Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * copyright (c) 2001 Fabrice Bellard | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVCODEC_AVCODEC_H | |
22 | #define AVCODEC_AVCODEC_H | |
23 | ||
24 | /** | |
25 | * @file | |
26 | * @ingroup libavc | |
27 | * Libavcodec external API header | |
28 | */ | |
29 | ||
30 | #include <errno.h> | |
31 | #include "libavutil/samplefmt.h" | |
32 | #include "libavutil/attributes.h" | |
33 | #include "libavutil/avutil.h" | |
34 | #include "libavutil/buffer.h" | |
35 | #include "libavutil/cpu.h" | |
36 | #include "libavutil/channel_layout.h" | |
37 | #include "libavutil/dict.h" | |
38 | #include "libavutil/frame.h" | |
39 | #include "libavutil/log.h" | |
40 | #include "libavutil/pixfmt.h" | |
41 | #include "libavutil/rational.h" | |
42 | ||
43 | #include "version.h" | |
44 | ||
2ba45a60 DM |
45 | /** |
46 | * @defgroup libavc Encoding/Decoding Library | |
47 | * @{ | |
48 | * | |
49 | * @defgroup lavc_decoding Decoding | |
50 | * @{ | |
51 | * @} | |
52 | * | |
53 | * @defgroup lavc_encoding Encoding | |
54 | * @{ | |
55 | * @} | |
56 | * | |
57 | * @defgroup lavc_codec Codecs | |
58 | * @{ | |
59 | * @defgroup lavc_codec_native Native Codecs | |
60 | * @{ | |
61 | * @} | |
62 | * @defgroup lavc_codec_wrappers External library wrappers | |
63 | * @{ | |
64 | * @} | |
65 | * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge | |
66 | * @{ | |
67 | * @} | |
68 | * @} | |
69 | * @defgroup lavc_internal Internal | |
70 | * @{ | |
71 | * @} | |
72 | * @} | |
73 | * | |
74 | */ | |
75 | ||
76 | /** | |
77 | * @defgroup lavc_core Core functions/structures. | |
78 | * @ingroup libavc | |
79 | * | |
80 | * Basic definitions, functions for querying libavcodec capabilities, | |
81 | * allocating core structures, etc. | |
82 | * @{ | |
83 | */ | |
84 | ||
85 | ||
86 | /** | |
87 | * Identify the syntax and semantics of the bitstream. | |
88 | * The principle is roughly: | |
89 | * Two decoders with the same ID can decode the same streams. | |
90 | * Two encoders with the same ID can encode compatible streams. | |
91 | * There may be slight deviations from the principle due to implementation | |
92 | * details. | |
93 | * | |
94 | * If you add a codec ID to this list, add it so that | |
95 | * 1. no value of a existing codec ID changes (that would break ABI), | |
96 | * 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec. | |
97 | * This ensures that 2 forks can independently add AVCodecIDs without producing conflicts. | |
98 | * | |
99 | * After adding new codec IDs, do not forget to add an entry to the codec | |
100 | * descriptor list and bump libavcodec minor version. | |
101 | */ | |
102 | enum AVCodecID { | |
103 | AV_CODEC_ID_NONE, | |
104 | ||
105 | /* video codecs */ | |
106 | AV_CODEC_ID_MPEG1VIDEO, | |
107 | AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding | |
108 | #if FF_API_XVMC | |
109 | AV_CODEC_ID_MPEG2VIDEO_XVMC, | |
110 | #endif /* FF_API_XVMC */ | |
111 | AV_CODEC_ID_H261, | |
112 | AV_CODEC_ID_H263, | |
113 | AV_CODEC_ID_RV10, | |
114 | AV_CODEC_ID_RV20, | |
115 | AV_CODEC_ID_MJPEG, | |
116 | AV_CODEC_ID_MJPEGB, | |
117 | AV_CODEC_ID_LJPEG, | |
118 | AV_CODEC_ID_SP5X, | |
119 | AV_CODEC_ID_JPEGLS, | |
120 | AV_CODEC_ID_MPEG4, | |
121 | AV_CODEC_ID_RAWVIDEO, | |
122 | AV_CODEC_ID_MSMPEG4V1, | |
123 | AV_CODEC_ID_MSMPEG4V2, | |
124 | AV_CODEC_ID_MSMPEG4V3, | |
125 | AV_CODEC_ID_WMV1, | |
126 | AV_CODEC_ID_WMV2, | |
127 | AV_CODEC_ID_H263P, | |
128 | AV_CODEC_ID_H263I, | |
129 | AV_CODEC_ID_FLV1, | |
130 | AV_CODEC_ID_SVQ1, | |
131 | AV_CODEC_ID_SVQ3, | |
132 | AV_CODEC_ID_DVVIDEO, | |
133 | AV_CODEC_ID_HUFFYUV, | |
134 | AV_CODEC_ID_CYUV, | |
135 | AV_CODEC_ID_H264, | |
136 | AV_CODEC_ID_INDEO3, | |
137 | AV_CODEC_ID_VP3, | |
138 | AV_CODEC_ID_THEORA, | |
139 | AV_CODEC_ID_ASV1, | |
140 | AV_CODEC_ID_ASV2, | |
141 | AV_CODEC_ID_FFV1, | |
142 | AV_CODEC_ID_4XM, | |
143 | AV_CODEC_ID_VCR1, | |
144 | AV_CODEC_ID_CLJR, | |
145 | AV_CODEC_ID_MDEC, | |
146 | AV_CODEC_ID_ROQ, | |
147 | AV_CODEC_ID_INTERPLAY_VIDEO, | |
148 | AV_CODEC_ID_XAN_WC3, | |
149 | AV_CODEC_ID_XAN_WC4, | |
150 | AV_CODEC_ID_RPZA, | |
151 | AV_CODEC_ID_CINEPAK, | |
152 | AV_CODEC_ID_WS_VQA, | |
153 | AV_CODEC_ID_MSRLE, | |
154 | AV_CODEC_ID_MSVIDEO1, | |
155 | AV_CODEC_ID_IDCIN, | |
156 | AV_CODEC_ID_8BPS, | |
157 | AV_CODEC_ID_SMC, | |
158 | AV_CODEC_ID_FLIC, | |
159 | AV_CODEC_ID_TRUEMOTION1, | |
160 | AV_CODEC_ID_VMDVIDEO, | |
161 | AV_CODEC_ID_MSZH, | |
162 | AV_CODEC_ID_ZLIB, | |
163 | AV_CODEC_ID_QTRLE, | |
164 | AV_CODEC_ID_TSCC, | |
165 | AV_CODEC_ID_ULTI, | |
166 | AV_CODEC_ID_QDRAW, | |
167 | AV_CODEC_ID_VIXL, | |
168 | AV_CODEC_ID_QPEG, | |
169 | AV_CODEC_ID_PNG, | |
170 | AV_CODEC_ID_PPM, | |
171 | AV_CODEC_ID_PBM, | |
172 | AV_CODEC_ID_PGM, | |
173 | AV_CODEC_ID_PGMYUV, | |
174 | AV_CODEC_ID_PAM, | |
175 | AV_CODEC_ID_FFVHUFF, | |
176 | AV_CODEC_ID_RV30, | |
177 | AV_CODEC_ID_RV40, | |
178 | AV_CODEC_ID_VC1, | |
179 | AV_CODEC_ID_WMV3, | |
180 | AV_CODEC_ID_LOCO, | |
181 | AV_CODEC_ID_WNV1, | |
182 | AV_CODEC_ID_AASC, | |
183 | AV_CODEC_ID_INDEO2, | |
184 | AV_CODEC_ID_FRAPS, | |
185 | AV_CODEC_ID_TRUEMOTION2, | |
186 | AV_CODEC_ID_BMP, | |
187 | AV_CODEC_ID_CSCD, | |
188 | AV_CODEC_ID_MMVIDEO, | |
189 | AV_CODEC_ID_ZMBV, | |
190 | AV_CODEC_ID_AVS, | |
191 | AV_CODEC_ID_SMACKVIDEO, | |
192 | AV_CODEC_ID_NUV, | |
193 | AV_CODEC_ID_KMVC, | |
194 | AV_CODEC_ID_FLASHSV, | |
195 | AV_CODEC_ID_CAVS, | |
196 | AV_CODEC_ID_JPEG2000, | |
197 | AV_CODEC_ID_VMNC, | |
198 | AV_CODEC_ID_VP5, | |
199 | AV_CODEC_ID_VP6, | |
200 | AV_CODEC_ID_VP6F, | |
201 | AV_CODEC_ID_TARGA, | |
202 | AV_CODEC_ID_DSICINVIDEO, | |
203 | AV_CODEC_ID_TIERTEXSEQVIDEO, | |
204 | AV_CODEC_ID_TIFF, | |
205 | AV_CODEC_ID_GIF, | |
206 | AV_CODEC_ID_DXA, | |
207 | AV_CODEC_ID_DNXHD, | |
208 | AV_CODEC_ID_THP, | |
209 | AV_CODEC_ID_SGI, | |
210 | AV_CODEC_ID_C93, | |
211 | AV_CODEC_ID_BETHSOFTVID, | |
212 | AV_CODEC_ID_PTX, | |
213 | AV_CODEC_ID_TXD, | |
214 | AV_CODEC_ID_VP6A, | |
215 | AV_CODEC_ID_AMV, | |
216 | AV_CODEC_ID_VB, | |
217 | AV_CODEC_ID_PCX, | |
218 | AV_CODEC_ID_SUNRAST, | |
219 | AV_CODEC_ID_INDEO4, | |
220 | AV_CODEC_ID_INDEO5, | |
221 | AV_CODEC_ID_MIMIC, | |
222 | AV_CODEC_ID_RL2, | |
223 | AV_CODEC_ID_ESCAPE124, | |
224 | AV_CODEC_ID_DIRAC, | |
225 | AV_CODEC_ID_BFI, | |
226 | AV_CODEC_ID_CMV, | |
227 | AV_CODEC_ID_MOTIONPIXELS, | |
228 | AV_CODEC_ID_TGV, | |
229 | AV_CODEC_ID_TGQ, | |
230 | AV_CODEC_ID_TQI, | |
231 | AV_CODEC_ID_AURA, | |
232 | AV_CODEC_ID_AURA2, | |
233 | AV_CODEC_ID_V210X, | |
234 | AV_CODEC_ID_TMV, | |
235 | AV_CODEC_ID_V210, | |
236 | AV_CODEC_ID_DPX, | |
237 | AV_CODEC_ID_MAD, | |
238 | AV_CODEC_ID_FRWU, | |
239 | AV_CODEC_ID_FLASHSV2, | |
240 | AV_CODEC_ID_CDGRAPHICS, | |
241 | AV_CODEC_ID_R210, | |
242 | AV_CODEC_ID_ANM, | |
243 | AV_CODEC_ID_BINKVIDEO, | |
244 | AV_CODEC_ID_IFF_ILBM, | |
245 | AV_CODEC_ID_IFF_BYTERUN1, | |
246 | AV_CODEC_ID_KGV1, | |
247 | AV_CODEC_ID_YOP, | |
248 | AV_CODEC_ID_VP8, | |
249 | AV_CODEC_ID_PICTOR, | |
250 | AV_CODEC_ID_ANSI, | |
251 | AV_CODEC_ID_A64_MULTI, | |
252 | AV_CODEC_ID_A64_MULTI5, | |
253 | AV_CODEC_ID_R10K, | |
254 | AV_CODEC_ID_MXPEG, | |
255 | AV_CODEC_ID_LAGARITH, | |
256 | AV_CODEC_ID_PRORES, | |
257 | AV_CODEC_ID_JV, | |
258 | AV_CODEC_ID_DFA, | |
259 | AV_CODEC_ID_WMV3IMAGE, | |
260 | AV_CODEC_ID_VC1IMAGE, | |
261 | AV_CODEC_ID_UTVIDEO, | |
262 | AV_CODEC_ID_BMV_VIDEO, | |
263 | AV_CODEC_ID_VBLE, | |
264 | AV_CODEC_ID_DXTORY, | |
265 | AV_CODEC_ID_V410, | |
266 | AV_CODEC_ID_XWD, | |
267 | AV_CODEC_ID_CDXL, | |
268 | AV_CODEC_ID_XBM, | |
269 | AV_CODEC_ID_ZEROCODEC, | |
270 | AV_CODEC_ID_MSS1, | |
271 | AV_CODEC_ID_MSA1, | |
272 | AV_CODEC_ID_TSCC2, | |
273 | AV_CODEC_ID_MTS2, | |
274 | AV_CODEC_ID_CLLC, | |
275 | AV_CODEC_ID_MSS2, | |
276 | AV_CODEC_ID_VP9, | |
277 | AV_CODEC_ID_AIC, | |
278 | AV_CODEC_ID_ESCAPE130_DEPRECATED, | |
279 | AV_CODEC_ID_G2M_DEPRECATED, | |
280 | AV_CODEC_ID_WEBP_DEPRECATED, | |
281 | AV_CODEC_ID_HNM4_VIDEO, | |
282 | AV_CODEC_ID_HEVC_DEPRECATED, | |
283 | AV_CODEC_ID_FIC, | |
284 | AV_CODEC_ID_ALIAS_PIX, | |
285 | AV_CODEC_ID_BRENDER_PIX_DEPRECATED, | |
286 | AV_CODEC_ID_PAF_VIDEO_DEPRECATED, | |
287 | AV_CODEC_ID_EXR_DEPRECATED, | |
288 | AV_CODEC_ID_VP7_DEPRECATED, | |
289 | AV_CODEC_ID_SANM_DEPRECATED, | |
290 | AV_CODEC_ID_SGIRLE_DEPRECATED, | |
291 | AV_CODEC_ID_MVC1_DEPRECATED, | |
292 | AV_CODEC_ID_MVC2_DEPRECATED, | |
293 | ||
294 | AV_CODEC_ID_BRENDER_PIX= MKBETAG('B','P','I','X'), | |
295 | AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'), | |
296 | AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'), | |
297 | AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'), | |
298 | AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'), | |
299 | ||
300 | AV_CODEC_ID_012V = MKBETAG('0','1','2','V'), | |
301 | AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'), | |
302 | AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'), | |
303 | AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'), | |
304 | AV_CODEC_ID_TARGA_Y216 = MKBETAG('T','2','1','6'), | |
305 | AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'), | |
306 | AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'), | |
307 | AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'), | |
308 | AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'), | |
309 | AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'), | |
310 | AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'), | |
311 | AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'), | |
312 | AV_CODEC_ID_XFACE = MKBETAG('X','F','A','C'), | |
313 | AV_CODEC_ID_SGIRLE = MKBETAG('S','G','I','R'), | |
314 | AV_CODEC_ID_MVC1 = MKBETAG('M','V','C','1'), | |
315 | AV_CODEC_ID_MVC2 = MKBETAG('M','V','C','2'), | |
316 | AV_CODEC_ID_SNOW = MKBETAG('S','N','O','W'), | |
317 | AV_CODEC_ID_WEBP = MKBETAG('W','E','B','P'), | |
318 | AV_CODEC_ID_SMVJPEG = MKBETAG('S','M','V','J'), | |
319 | AV_CODEC_ID_HEVC = MKBETAG('H','2','6','5'), | |
320 | #define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC | |
321 | AV_CODEC_ID_VP7 = MKBETAG('V','P','7','0'), | |
f6fa7814 | 322 | AV_CODEC_ID_APNG = MKBETAG('A','P','N','G'), |
2ba45a60 DM |
323 | |
324 | /* various PCM "codecs" */ | |
325 | AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs | |
326 | AV_CODEC_ID_PCM_S16LE = 0x10000, | |
327 | AV_CODEC_ID_PCM_S16BE, | |
328 | AV_CODEC_ID_PCM_U16LE, | |
329 | AV_CODEC_ID_PCM_U16BE, | |
330 | AV_CODEC_ID_PCM_S8, | |
331 | AV_CODEC_ID_PCM_U8, | |
332 | AV_CODEC_ID_PCM_MULAW, | |
333 | AV_CODEC_ID_PCM_ALAW, | |
334 | AV_CODEC_ID_PCM_S32LE, | |
335 | AV_CODEC_ID_PCM_S32BE, | |
336 | AV_CODEC_ID_PCM_U32LE, | |
337 | AV_CODEC_ID_PCM_U32BE, | |
338 | AV_CODEC_ID_PCM_S24LE, | |
339 | AV_CODEC_ID_PCM_S24BE, | |
340 | AV_CODEC_ID_PCM_U24LE, | |
341 | AV_CODEC_ID_PCM_U24BE, | |
342 | AV_CODEC_ID_PCM_S24DAUD, | |
343 | AV_CODEC_ID_PCM_ZORK, | |
344 | AV_CODEC_ID_PCM_S16LE_PLANAR, | |
345 | AV_CODEC_ID_PCM_DVD, | |
346 | AV_CODEC_ID_PCM_F32BE, | |
347 | AV_CODEC_ID_PCM_F32LE, | |
348 | AV_CODEC_ID_PCM_F64BE, | |
349 | AV_CODEC_ID_PCM_F64LE, | |
350 | AV_CODEC_ID_PCM_BLURAY, | |
351 | AV_CODEC_ID_PCM_LXF, | |
352 | AV_CODEC_ID_S302M, | |
353 | AV_CODEC_ID_PCM_S8_PLANAR, | |
354 | AV_CODEC_ID_PCM_S24LE_PLANAR_DEPRECATED, | |
355 | AV_CODEC_ID_PCM_S32LE_PLANAR_DEPRECATED, | |
356 | AV_CODEC_ID_PCM_S24LE_PLANAR = MKBETAG(24,'P','S','P'), | |
357 | AV_CODEC_ID_PCM_S32LE_PLANAR = MKBETAG(32,'P','S','P'), | |
358 | AV_CODEC_ID_PCM_S16BE_PLANAR = MKBETAG('P','S','P',16), | |
359 | ||
360 | /* various ADPCM codecs */ | |
361 | AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, | |
362 | AV_CODEC_ID_ADPCM_IMA_WAV, | |
363 | AV_CODEC_ID_ADPCM_IMA_DK3, | |
364 | AV_CODEC_ID_ADPCM_IMA_DK4, | |
365 | AV_CODEC_ID_ADPCM_IMA_WS, | |
366 | AV_CODEC_ID_ADPCM_IMA_SMJPEG, | |
367 | AV_CODEC_ID_ADPCM_MS, | |
368 | AV_CODEC_ID_ADPCM_4XM, | |
369 | AV_CODEC_ID_ADPCM_XA, | |
370 | AV_CODEC_ID_ADPCM_ADX, | |
371 | AV_CODEC_ID_ADPCM_EA, | |
372 | AV_CODEC_ID_ADPCM_G726, | |
373 | AV_CODEC_ID_ADPCM_CT, | |
374 | AV_CODEC_ID_ADPCM_SWF, | |
375 | AV_CODEC_ID_ADPCM_YAMAHA, | |
376 | AV_CODEC_ID_ADPCM_SBPRO_4, | |
377 | AV_CODEC_ID_ADPCM_SBPRO_3, | |
378 | AV_CODEC_ID_ADPCM_SBPRO_2, | |
379 | AV_CODEC_ID_ADPCM_THP, | |
380 | AV_CODEC_ID_ADPCM_IMA_AMV, | |
381 | AV_CODEC_ID_ADPCM_EA_R1, | |
382 | AV_CODEC_ID_ADPCM_EA_R3, | |
383 | AV_CODEC_ID_ADPCM_EA_R2, | |
384 | AV_CODEC_ID_ADPCM_IMA_EA_SEAD, | |
385 | AV_CODEC_ID_ADPCM_IMA_EA_EACS, | |
386 | AV_CODEC_ID_ADPCM_EA_XAS, | |
387 | AV_CODEC_ID_ADPCM_EA_MAXIS_XA, | |
388 | AV_CODEC_ID_ADPCM_IMA_ISS, | |
389 | AV_CODEC_ID_ADPCM_G722, | |
390 | AV_CODEC_ID_ADPCM_IMA_APC, | |
391 | AV_CODEC_ID_ADPCM_VIMA_DEPRECATED, | |
392 | AV_CODEC_ID_ADPCM_VIMA = MKBETAG('V','I','M','A'), | |
393 | AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'), | |
394 | AV_CODEC_ID_ADPCM_AFC = MKBETAG('A','F','C',' '), | |
395 | AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '), | |
396 | AV_CODEC_ID_ADPCM_DTK = MKBETAG('D','T','K',' '), | |
397 | AV_CODEC_ID_ADPCM_IMA_RAD = MKBETAG('R','A','D',' '), | |
398 | AV_CODEC_ID_ADPCM_G726LE = MKBETAG('6','2','7','G'), | |
399 | ||
400 | /* AMR */ | |
401 | AV_CODEC_ID_AMR_NB = 0x12000, | |
402 | AV_CODEC_ID_AMR_WB, | |
403 | ||
404 | /* RealAudio codecs*/ | |
405 | AV_CODEC_ID_RA_144 = 0x13000, | |
406 | AV_CODEC_ID_RA_288, | |
407 | ||
408 | /* various DPCM codecs */ | |
409 | AV_CODEC_ID_ROQ_DPCM = 0x14000, | |
410 | AV_CODEC_ID_INTERPLAY_DPCM, | |
411 | AV_CODEC_ID_XAN_DPCM, | |
412 | AV_CODEC_ID_SOL_DPCM, | |
413 | ||
414 | /* audio codecs */ | |
415 | AV_CODEC_ID_MP2 = 0x15000, | |
416 | AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 | |
417 | AV_CODEC_ID_AAC, | |
418 | AV_CODEC_ID_AC3, | |
419 | AV_CODEC_ID_DTS, | |
420 | AV_CODEC_ID_VORBIS, | |
421 | AV_CODEC_ID_DVAUDIO, | |
422 | AV_CODEC_ID_WMAV1, | |
423 | AV_CODEC_ID_WMAV2, | |
424 | AV_CODEC_ID_MACE3, | |
425 | AV_CODEC_ID_MACE6, | |
426 | AV_CODEC_ID_VMDAUDIO, | |
427 | AV_CODEC_ID_FLAC, | |
428 | AV_CODEC_ID_MP3ADU, | |
429 | AV_CODEC_ID_MP3ON4, | |
430 | AV_CODEC_ID_SHORTEN, | |
431 | AV_CODEC_ID_ALAC, | |
432 | AV_CODEC_ID_WESTWOOD_SND1, | |
433 | AV_CODEC_ID_GSM, ///< as in Berlin toast format | |
434 | AV_CODEC_ID_QDM2, | |
435 | AV_CODEC_ID_COOK, | |
436 | AV_CODEC_ID_TRUESPEECH, | |
437 | AV_CODEC_ID_TTA, | |
438 | AV_CODEC_ID_SMACKAUDIO, | |
439 | AV_CODEC_ID_QCELP, | |
440 | AV_CODEC_ID_WAVPACK, | |
441 | AV_CODEC_ID_DSICINAUDIO, | |
442 | AV_CODEC_ID_IMC, | |
443 | AV_CODEC_ID_MUSEPACK7, | |
444 | AV_CODEC_ID_MLP, | |
445 | AV_CODEC_ID_GSM_MS, /* as found in WAV */ | |
446 | AV_CODEC_ID_ATRAC3, | |
447 | #if FF_API_VOXWARE | |
448 | AV_CODEC_ID_VOXWARE, | |
449 | #endif | |
450 | AV_CODEC_ID_APE, | |
451 | AV_CODEC_ID_NELLYMOSER, | |
452 | AV_CODEC_ID_MUSEPACK8, | |
453 | AV_CODEC_ID_SPEEX, | |
454 | AV_CODEC_ID_WMAVOICE, | |
455 | AV_CODEC_ID_WMAPRO, | |
456 | AV_CODEC_ID_WMALOSSLESS, | |
457 | AV_CODEC_ID_ATRAC3P, | |
458 | AV_CODEC_ID_EAC3, | |
459 | AV_CODEC_ID_SIPR, | |
460 | AV_CODEC_ID_MP1, | |
461 | AV_CODEC_ID_TWINVQ, | |
462 | AV_CODEC_ID_TRUEHD, | |
463 | AV_CODEC_ID_MP4ALS, | |
464 | AV_CODEC_ID_ATRAC1, | |
465 | AV_CODEC_ID_BINKAUDIO_RDFT, | |
466 | AV_CODEC_ID_BINKAUDIO_DCT, | |
467 | AV_CODEC_ID_AAC_LATM, | |
468 | AV_CODEC_ID_QDMC, | |
469 | AV_CODEC_ID_CELT, | |
470 | AV_CODEC_ID_G723_1, | |
471 | AV_CODEC_ID_G729, | |
472 | AV_CODEC_ID_8SVX_EXP, | |
473 | AV_CODEC_ID_8SVX_FIB, | |
474 | AV_CODEC_ID_BMV_AUDIO, | |
475 | AV_CODEC_ID_RALF, | |
476 | AV_CODEC_ID_IAC, | |
477 | AV_CODEC_ID_ILBC, | |
478 | AV_CODEC_ID_OPUS_DEPRECATED, | |
479 | AV_CODEC_ID_COMFORT_NOISE, | |
480 | AV_CODEC_ID_TAK_DEPRECATED, | |
481 | AV_CODEC_ID_METASOUND, | |
482 | AV_CODEC_ID_PAF_AUDIO_DEPRECATED, | |
483 | AV_CODEC_ID_ON2AVC, | |
484 | AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'), | |
485 | AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'), | |
486 | AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'), | |
487 | AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'), | |
488 | AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'), | |
489 | AV_CODEC_ID_TAK = MKBETAG('t','B','a','K'), | |
490 | AV_CODEC_ID_EVRC = MKBETAG('s','e','v','c'), | |
491 | AV_CODEC_ID_SMV = MKBETAG('s','s','m','v'), | |
492 | AV_CODEC_ID_DSD_LSBF = MKBETAG('D','S','D','L'), | |
493 | AV_CODEC_ID_DSD_MSBF = MKBETAG('D','S','D','M'), | |
494 | AV_CODEC_ID_DSD_LSBF_PLANAR = MKBETAG('D','S','D','1'), | |
495 | AV_CODEC_ID_DSD_MSBF_PLANAR = MKBETAG('D','S','D','8'), | |
496 | ||
497 | /* subtitle codecs */ | |
498 | AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. | |
499 | AV_CODEC_ID_DVD_SUBTITLE = 0x17000, | |
500 | AV_CODEC_ID_DVB_SUBTITLE, | |
501 | AV_CODEC_ID_TEXT, ///< raw UTF-8 text | |
502 | AV_CODEC_ID_XSUB, | |
503 | AV_CODEC_ID_SSA, | |
504 | AV_CODEC_ID_MOV_TEXT, | |
505 | AV_CODEC_ID_HDMV_PGS_SUBTITLE, | |
506 | AV_CODEC_ID_DVB_TELETEXT, | |
507 | AV_CODEC_ID_SRT, | |
508 | AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'), | |
509 | AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'), | |
510 | AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'), | |
511 | AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'), | |
512 | AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'), | |
f6fa7814 | 513 | AV_CODEC_ID_STL = MKBETAG('S','p','T','L'), |
2ba45a60 DM |
514 | AV_CODEC_ID_SUBVIEWER1 = MKBETAG('S','b','V','1'), |
515 | AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'), | |
516 | AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'), | |
517 | AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'), | |
518 | AV_CODEC_ID_MPL2 = MKBETAG('M','P','L','2'), | |
519 | AV_CODEC_ID_VPLAYER = MKBETAG('V','P','l','r'), | |
520 | AV_CODEC_ID_PJS = MKBETAG('P','h','J','S'), | |
521 | AV_CODEC_ID_ASS = MKBETAG('A','S','S',' '), ///< ASS as defined in Matroska | |
522 | ||
523 | /* other specific kind of codecs (generally used for attachments) */ | |
524 | AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. | |
525 | AV_CODEC_ID_TTF = 0x18000, | |
526 | AV_CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'), | |
527 | AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'), | |
528 | AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'), | |
529 | AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'), | |
530 | AV_CODEC_ID_SMPTE_KLV = MKBETAG('K','L','V','A'), | |
531 | AV_CODEC_ID_DVD_NAV = MKBETAG('D','N','A','V'), | |
532 | AV_CODEC_ID_TIMED_ID3 = MKBETAG('T','I','D','3'), | |
533 | AV_CODEC_ID_BIN_DATA = MKBETAG('D','A','T','A'), | |
534 | ||
535 | ||
536 | AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it | |
537 | ||
538 | AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS | |
539 | * stream (only used by libavformat) */ | |
540 | AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems | |
541 | * stream (only used by libavformat) */ | |
542 | AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. | |
543 | ||
544 | #if FF_API_CODEC_ID | |
545 | #include "old_codec_ids.h" | |
546 | #endif | |
547 | }; | |
548 | ||
549 | /** | |
550 | * This struct describes the properties of a single codec described by an | |
551 | * AVCodecID. | |
f6fa7814 | 552 | * @see avcodec_descriptor_get() |
2ba45a60 DM |
553 | */ |
554 | typedef struct AVCodecDescriptor { | |
555 | enum AVCodecID id; | |
556 | enum AVMediaType type; | |
557 | /** | |
558 | * Name of the codec described by this descriptor. It is non-empty and | |
559 | * unique for each codec descriptor. It should contain alphanumeric | |
560 | * characters and '_' only. | |
561 | */ | |
562 | const char *name; | |
563 | /** | |
564 | * A more descriptive name for this codec. May be NULL. | |
565 | */ | |
566 | const char *long_name; | |
567 | /** | |
568 | * Codec properties, a combination of AV_CODEC_PROP_* flags. | |
569 | */ | |
570 | int props; | |
571 | ||
572 | /** | |
573 | * MIME type(s) associated with the codec. | |
574 | * May be NULL; if not, a NULL-terminated array of MIME types. | |
575 | * The first item is always non-NULL and is the preferred MIME type. | |
576 | */ | |
577 | const char *const *mime_types; | |
578 | } AVCodecDescriptor; | |
579 | ||
580 | /** | |
581 | * Codec uses only intra compression. | |
582 | * Video codecs only. | |
583 | */ | |
584 | #define AV_CODEC_PROP_INTRA_ONLY (1 << 0) | |
585 | /** | |
586 | * Codec supports lossy compression. Audio and video codecs only. | |
587 | * @note a codec may support both lossy and lossless | |
588 | * compression modes | |
589 | */ | |
590 | #define AV_CODEC_PROP_LOSSY (1 << 1) | |
591 | /** | |
592 | * Codec supports lossless compression. Audio and video codecs only. | |
593 | */ | |
594 | #define AV_CODEC_PROP_LOSSLESS (1 << 2) | |
595 | /** | |
596 | * Codec supports frame reordering. That is, the coded order (the order in which | |
597 | * the encoded packets are output by the encoders / stored / input to the | |
598 | * decoders) may be different from the presentation order of the corresponding | |
599 | * frames. | |
600 | * | |
601 | * For codecs that do not have this property set, PTS and DTS should always be | |
602 | * equal. | |
603 | */ | |
604 | #define AV_CODEC_PROP_REORDER (1 << 3) | |
605 | /** | |
606 | * Subtitle codec is bitmap based | |
607 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field. | |
608 | */ | |
609 | #define AV_CODEC_PROP_BITMAP_SUB (1 << 16) | |
610 | /** | |
611 | * Subtitle codec is text based. | |
612 | * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field. | |
613 | */ | |
614 | #define AV_CODEC_PROP_TEXT_SUB (1 << 17) | |
615 | ||
616 | /** | |
617 | * @ingroup lavc_decoding | |
618 | * Required number of additionally allocated bytes at the end of the input bitstream for decoding. | |
619 | * This is mainly needed because some optimized bitstream readers read | |
620 | * 32 or 64 bit at once and could read over the end.<br> | |
621 | * Note: If the first 23 bits of the additional bytes are not 0, then damaged | |
622 | * MPEG bitstreams could cause overread and segfault. | |
623 | */ | |
624 | #define FF_INPUT_BUFFER_PADDING_SIZE 32 | |
625 | ||
626 | /** | |
627 | * @ingroup lavc_encoding | |
628 | * minimum encoding buffer size | |
629 | * Used to avoid some checks during header writing. | |
630 | */ | |
631 | #define FF_MIN_BUFFER_SIZE 16384 | |
632 | ||
633 | ||
634 | /** | |
635 | * @ingroup lavc_encoding | |
636 | * motion estimation type. | |
637 | */ | |
638 | enum Motion_Est_ID { | |
639 | ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed | |
640 | ME_FULL, | |
641 | ME_LOG, | |
642 | ME_PHODS, | |
643 | ME_EPZS, ///< enhanced predictive zonal search | |
644 | ME_X1, ///< reserved for experiments | |
645 | ME_HEX, ///< hexagon based search | |
646 | ME_UMH, ///< uneven multi-hexagon search | |
647 | ME_TESA, ///< transformed exhaustive search algorithm | |
648 | ME_ITER=50, ///< iterative search | |
649 | }; | |
650 | ||
651 | /** | |
652 | * @ingroup lavc_decoding | |
653 | */ | |
654 | enum AVDiscard{ | |
655 | /* We leave some space between them for extensions (drop some | |
656 | * keyframes for intra-only or drop just some bidir frames). */ | |
657 | AVDISCARD_NONE =-16, ///< discard nothing | |
658 | AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi | |
659 | AVDISCARD_NONREF = 8, ///< discard all non reference | |
660 | AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames | |
661 | AVDISCARD_NONINTRA= 24, ///< discard all non intra frames | |
662 | AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes | |
663 | AVDISCARD_ALL = 48, ///< discard all | |
664 | }; | |
665 | ||
666 | enum AVAudioServiceType { | |
667 | AV_AUDIO_SERVICE_TYPE_MAIN = 0, | |
668 | AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, | |
669 | AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, | |
670 | AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, | |
671 | AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, | |
672 | AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, | |
673 | AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, | |
674 | AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, | |
675 | AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, | |
676 | AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI | |
677 | }; | |
678 | ||
679 | /** | |
680 | * @ingroup lavc_encoding | |
681 | */ | |
682 | typedef struct RcOverride{ | |
683 | int start_frame; | |
684 | int end_frame; | |
685 | int qscale; // If this is 0 then quality_factor will be used instead. | |
686 | float quality_factor; | |
687 | } RcOverride; | |
688 | ||
689 | #if FF_API_MAX_BFRAMES | |
690 | /** | |
691 | * @deprecated there is no libavcodec-wide limit on the number of B-frames | |
692 | */ | |
693 | #define FF_MAX_B_FRAMES 16 | |
694 | #endif | |
695 | ||
696 | /* encoding support | |
697 | These flags can be passed in AVCodecContext.flags before initialization. | |
698 | Note: Not everything is supported yet. | |
699 | */ | |
700 | ||
701 | /** | |
702 | * Allow decoders to produce frames with data planes that are not aligned | |
703 | * to CPU requirements (e.g. due to cropping). | |
704 | */ | |
705 | #define CODEC_FLAG_UNALIGNED 0x0001 | |
706 | #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. | |
707 | #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. | |
708 | #define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted | |
709 | #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. | |
710 | #if FF_API_GMC | |
711 | /** | |
712 | * @deprecated use the "gmc" private option of the libxvid encoder | |
713 | */ | |
714 | #define CODEC_FLAG_GMC 0x0020 ///< Use GMC. | |
715 | #endif | |
716 | #if FF_API_MV0 | |
717 | /** | |
718 | * @deprecated use the flag "mv0" in the "mpv_flags" private option of the | |
719 | * mpegvideo encoders | |
720 | */ | |
721 | #define CODEC_FLAG_MV0 0x0040 | |
722 | #endif | |
723 | #if FF_API_INPUT_PRESERVED | |
724 | /** | |
725 | * @deprecated passing reference-counted frames to the encoders replaces this | |
726 | * flag | |
727 | */ | |
728 | #define CODEC_FLAG_INPUT_PRESERVED 0x0100 | |
729 | #endif | |
730 | #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. | |
731 | #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. | |
732 | #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. | |
733 | #if FF_API_EMU_EDGE | |
734 | /** | |
735 | * @deprecated edges are not used/required anymore. I.e. this flag is now always | |
736 | * set. | |
737 | */ | |
738 | #define CODEC_FLAG_EMU_EDGE 0x4000 | |
739 | #endif | |
740 | #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. | |
741 | #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random | |
742 | location instead of only at frame boundaries. */ | |
743 | #if FF_API_NORMALIZE_AQP | |
744 | /** | |
745 | * @deprecated use the flag "naq" in the "mpv_flags" private option of the | |
746 | * mpegvideo encoders | |
747 | */ | |
748 | #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 | |
749 | #endif | |
750 | #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. | |
751 | #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. | |
752 | #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. | |
753 | #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). | |
754 | /* Fx : Flag for h263+ extra options */ | |
755 | #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction | |
756 | #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter | |
757 | #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation | |
758 | #define CODEC_FLAG_CLOSED_GOP 0x80000000 | |
759 | #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. | |
760 | #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. | |
761 | #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. | |
762 | #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!! | |
763 | #define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS. | |
764 | ||
765 | #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. | |
766 | #define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe | |
767 | #define CODEC_FLAG2_EXPORT_MVS 0x10000000 ///< Export motion vectors through frame side data | |
f6fa7814 | 768 | #define CODEC_FLAG2_SKIP_MANUAL 0x20000000 ///< Do not skip samples and export skip information as frame side data |
2ba45a60 DM |
769 | |
770 | /* Unsupported options : | |
771 | * Syntax Arithmetic coding (SAC) | |
772 | * Reference Picture Selection | |
773 | * Independent Segment Decoding */ | |
774 | /* /Fx */ | |
775 | /* codec capabilities */ | |
776 | ||
777 | #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback. | |
778 | /** | |
779 | * Codec uses get_buffer() for allocating buffers and supports custom allocators. | |
780 | * If not set, it might not use get_buffer() at all or use operations that | |
781 | * assume the buffer was allocated by avcodec_default_get_buffer. | |
782 | */ | |
783 | #define CODEC_CAP_DR1 0x0002 | |
784 | #define CODEC_CAP_TRUNCATED 0x0008 | |
785 | #if FF_API_XVMC | |
786 | /* Codec can export data for HW decoding. This flag indicates that | |
787 | * the codec would call get_format() with list that might contain HW accelerated | |
788 | * pixel formats (XvMC, VDPAU, VAAPI, etc). The application can pick any of them | |
789 | * including raw image format. | |
790 | * The application can use the passed context to determine bitstream version, | |
791 | * chroma format, resolution etc. | |
792 | */ | |
793 | #define CODEC_CAP_HWACCEL 0x0010 | |
794 | #endif /* FF_API_XVMC */ | |
795 | /** | |
796 | * Encoder or decoder requires flushing with NULL input at the end in order to | |
797 | * give the complete and correct output. | |
798 | * | |
799 | * NOTE: If this flag is not set, the codec is guaranteed to never be fed with | |
800 | * with NULL data. The user can still send NULL data to the public encode | |
801 | * or decode function, but libavcodec will not pass it along to the codec | |
802 | * unless this flag is set. | |
803 | * | |
804 | * Decoders: | |
805 | * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, | |
806 | * avpkt->size=0 at the end to get the delayed data until the decoder no longer | |
807 | * returns frames. | |
808 | * | |
809 | * Encoders: | |
810 | * The encoder needs to be fed with NULL data at the end of encoding until the | |
811 | * encoder no longer returns data. | |
812 | * | |
813 | * NOTE: For encoders implementing the AVCodec.encode2() function, setting this | |
814 | * flag also means that the encoder must set the pts and duration for | |
815 | * each output packet. If this flag is not set, the pts and duration will | |
816 | * be determined by libavcodec from the input frame. | |
817 | */ | |
818 | #define CODEC_CAP_DELAY 0x0020 | |
819 | /** | |
820 | * Codec can be fed a final frame with a smaller size. | |
821 | * This can be used to prevent truncation of the last audio samples. | |
822 | */ | |
823 | #define CODEC_CAP_SMALL_LAST_FRAME 0x0040 | |
824 | #if FF_API_CAP_VDPAU | |
825 | /** | |
826 | * Codec can export data for HW decoding (VDPAU). | |
827 | */ | |
828 | #define CODEC_CAP_HWACCEL_VDPAU 0x0080 | |
829 | #endif | |
830 | /** | |
831 | * Codec can output multiple frames per AVPacket | |
832 | * Normally demuxers return one frame at a time, demuxers which do not do | |
833 | * are connected to a parser to split what they return into proper frames. | |
834 | * This flag is reserved to the very rare category of codecs which have a | |
835 | * bitstream that cannot be split into frames without timeconsuming | |
836 | * operations like full decoding. Demuxers carring such bitstreams thus | |
837 | * may return multiple frames in a packet. This has many disadvantages like | |
838 | * prohibiting stream copy in many cases thus it should only be considered | |
839 | * as a last resort. | |
840 | */ | |
841 | #define CODEC_CAP_SUBFRAMES 0x0100 | |
842 | /** | |
843 | * Codec is experimental and is thus avoided in favor of non experimental | |
844 | * encoders | |
845 | */ | |
846 | #define CODEC_CAP_EXPERIMENTAL 0x0200 | |
847 | /** | |
848 | * Codec should fill in channel configuration and samplerate instead of container | |
849 | */ | |
850 | #define CODEC_CAP_CHANNEL_CONF 0x0400 | |
851 | #if FF_API_NEG_LINESIZES | |
852 | /** | |
853 | * @deprecated no codecs use this capability | |
854 | */ | |
855 | #define CODEC_CAP_NEG_LINESIZES 0x0800 | |
856 | #endif | |
857 | /** | |
858 | * Codec supports frame-level multithreading. | |
859 | */ | |
860 | #define CODEC_CAP_FRAME_THREADS 0x1000 | |
861 | /** | |
862 | * Codec supports slice-based (or partition-based) multithreading. | |
863 | */ | |
864 | #define CODEC_CAP_SLICE_THREADS 0x2000 | |
865 | /** | |
866 | * Codec supports changed parameters at any point. | |
867 | */ | |
868 | #define CODEC_CAP_PARAM_CHANGE 0x4000 | |
869 | /** | |
870 | * Codec supports avctx->thread_count == 0 (auto). | |
871 | */ | |
872 | #define CODEC_CAP_AUTO_THREADS 0x8000 | |
873 | /** | |
874 | * Audio encoder supports receiving a different number of samples in each call. | |
875 | */ | |
876 | #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000 | |
877 | /** | |
878 | * Codec is intra only. | |
879 | */ | |
880 | #define CODEC_CAP_INTRA_ONLY 0x40000000 | |
881 | /** | |
882 | * Codec is lossless. | |
883 | */ | |
884 | #define CODEC_CAP_LOSSLESS 0x80000000 | |
885 | ||
886 | #if FF_API_MB_TYPE | |
887 | //The following defines may change, don't expect compatibility if you use them. | |
888 | #define MB_TYPE_INTRA4x4 0x0001 | |
889 | #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific | |
890 | #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific | |
891 | #define MB_TYPE_16x16 0x0008 | |
892 | #define MB_TYPE_16x8 0x0010 | |
893 | #define MB_TYPE_8x16 0x0020 | |
894 | #define MB_TYPE_8x8 0x0040 | |
895 | #define MB_TYPE_INTERLACED 0x0080 | |
896 | #define MB_TYPE_DIRECT2 0x0100 //FIXME | |
897 | #define MB_TYPE_ACPRED 0x0200 | |
898 | #define MB_TYPE_GMC 0x0400 | |
899 | #define MB_TYPE_SKIP 0x0800 | |
900 | #define MB_TYPE_P0L0 0x1000 | |
901 | #define MB_TYPE_P1L0 0x2000 | |
902 | #define MB_TYPE_P0L1 0x4000 | |
903 | #define MB_TYPE_P1L1 0x8000 | |
904 | #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0) | |
905 | #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1) | |
906 | #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1) | |
907 | #define MB_TYPE_QUANT 0x00010000 | |
908 | #define MB_TYPE_CBP 0x00020000 | |
909 | //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...) | |
910 | #endif | |
911 | ||
912 | /** | |
913 | * Pan Scan area. | |
914 | * This specifies the area which should be displayed. | |
915 | * Note there may be multiple such areas for one frame. | |
916 | */ | |
917 | typedef struct AVPanScan{ | |
918 | /** | |
919 | * id | |
920 | * - encoding: Set by user. | |
921 | * - decoding: Set by libavcodec. | |
922 | */ | |
923 | int id; | |
924 | ||
925 | /** | |
926 | * width and height in 1/16 pel | |
927 | * - encoding: Set by user. | |
928 | * - decoding: Set by libavcodec. | |
929 | */ | |
930 | int width; | |
931 | int height; | |
932 | ||
933 | /** | |
934 | * position of the top left corner in 1/16 pel for up to 3 fields/frames | |
935 | * - encoding: Set by user. | |
936 | * - decoding: Set by libavcodec. | |
937 | */ | |
938 | int16_t position[3][2]; | |
939 | }AVPanScan; | |
940 | ||
941 | #if FF_API_QSCALE_TYPE | |
942 | #define FF_QSCALE_TYPE_MPEG1 0 | |
943 | #define FF_QSCALE_TYPE_MPEG2 1 | |
944 | #define FF_QSCALE_TYPE_H264 2 | |
945 | #define FF_QSCALE_TYPE_VP56 3 | |
946 | #endif | |
947 | ||
948 | #if FF_API_GET_BUFFER | |
949 | #define FF_BUFFER_TYPE_INTERNAL 1 | |
950 | #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user) | |
951 | #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared. | |
952 | #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. | |
953 | ||
954 | #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore). | |
955 | #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer. | |
956 | #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content. | |
957 | #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update). | |
958 | #endif | |
959 | ||
960 | /** | |
961 | * The decoder will keep a reference to the frame and may reuse it later. | |
962 | */ | |
963 | #define AV_GET_BUFFER_FLAG_REF (1 << 0) | |
964 | ||
965 | /** | |
966 | * @defgroup lavc_packet AVPacket | |
967 | * | |
968 | * Types and functions for working with AVPacket. | |
969 | * @{ | |
970 | */ | |
971 | enum AVPacketSideDataType { | |
972 | AV_PKT_DATA_PALETTE, | |
973 | AV_PKT_DATA_NEW_EXTRADATA, | |
974 | ||
975 | /** | |
976 | * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows: | |
977 | * @code | |
978 | * u32le param_flags | |
979 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) | |
980 | * s32le channel_count | |
981 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) | |
982 | * u64le channel_layout | |
983 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) | |
984 | * s32le sample_rate | |
985 | * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) | |
986 | * s32le width | |
987 | * s32le height | |
988 | * @endcode | |
989 | */ | |
990 | AV_PKT_DATA_PARAM_CHANGE, | |
991 | ||
992 | /** | |
993 | * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of | |
994 | * structures with info about macroblocks relevant to splitting the | |
995 | * packet into smaller packets on macroblock edges (e.g. as for RFC 2190). | |
996 | * That is, it does not necessarily contain info about all macroblocks, | |
997 | * as long as the distance between macroblocks in the info is smaller | |
998 | * than the target payload size. | |
999 | * Each MB info structure is 12 bytes, and is laid out as follows: | |
1000 | * @code | |
1001 | * u32le bit offset from the start of the packet | |
1002 | * u8 current quantizer at the start of the macroblock | |
1003 | * u8 GOB number | |
1004 | * u16le macroblock address within the GOB | |
1005 | * u8 horizontal MV predictor | |
1006 | * u8 vertical MV predictor | |
1007 | * u8 horizontal MV predictor for block number 3 | |
1008 | * u8 vertical MV predictor for block number 3 | |
1009 | * @endcode | |
1010 | */ | |
1011 | AV_PKT_DATA_H263_MB_INFO, | |
1012 | ||
1013 | /** | |
1014 | * This side data should be associated with an audio stream and contains | |
1015 | * ReplayGain information in form of the AVReplayGain struct. | |
1016 | */ | |
1017 | AV_PKT_DATA_REPLAYGAIN, | |
1018 | ||
1019 | /** | |
1020 | * This side data contains a 3x3 transformation matrix describing an affine | |
1021 | * transformation that needs to be applied to the decoded video frames for | |
1022 | * correct presentation. | |
1023 | * | |
1024 | * See libavutil/display.h for a detailed description of the data. | |
1025 | */ | |
1026 | AV_PKT_DATA_DISPLAYMATRIX, | |
1027 | ||
1028 | /** | |
1029 | * This side data should be associated with a video stream and contains | |
1030 | * Stereoscopic 3D information in form of the AVStereo3D struct. | |
1031 | */ | |
1032 | AV_PKT_DATA_STEREO3D, | |
1033 | ||
1034 | /** | |
1035 | * Recommmends skipping the specified number of samples | |
1036 | * @code | |
1037 | * u32le number of samples to skip from start of this packet | |
1038 | * u32le number of samples to skip from end of this packet | |
1039 | * u8 reason for start skip | |
1040 | * u8 reason for end skip (0=padding silence, 1=convergence) | |
1041 | * @endcode | |
1042 | */ | |
1043 | AV_PKT_DATA_SKIP_SAMPLES=70, | |
1044 | ||
1045 | /** | |
1046 | * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that | |
1047 | * the packet may contain "dual mono" audio specific to Japanese DTV | |
1048 | * and if it is true, recommends only the selected channel to be used. | |
1049 | * @code | |
1050 | * u8 selected channels (0=mail/left, 1=sub/right, 2=both) | |
1051 | * @endcode | |
1052 | */ | |
1053 | AV_PKT_DATA_JP_DUALMONO, | |
1054 | ||
1055 | /** | |
1056 | * A list of zero terminated key/value strings. There is no end marker for | |
1057 | * the list, so it is required to rely on the side data size to stop. | |
1058 | */ | |
1059 | AV_PKT_DATA_STRINGS_METADATA, | |
1060 | ||
1061 | /** | |
1062 | * Subtitle event position | |
1063 | * @code | |
1064 | * u32le x1 | |
1065 | * u32le y1 | |
1066 | * u32le x2 | |
1067 | * u32le y2 | |
1068 | * @endcode | |
1069 | */ | |
1070 | AV_PKT_DATA_SUBTITLE_POSITION, | |
1071 | ||
1072 | /** | |
1073 | * Data found in BlockAdditional element of matroska container. There is | |
1074 | * no end marker for the data, so it is required to rely on the side data | |
1075 | * size to recognize the end. 8 byte id (as found in BlockAddId) followed | |
1076 | * by data. | |
1077 | */ | |
1078 | AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, | |
1079 | ||
1080 | /** | |
1081 | * The optional first identifier line of a WebVTT cue. | |
1082 | */ | |
1083 | AV_PKT_DATA_WEBVTT_IDENTIFIER, | |
1084 | ||
1085 | /** | |
1086 | * The optional settings (rendering instructions) that immediately | |
1087 | * follow the timestamp specifier of a WebVTT cue. | |
1088 | */ | |
1089 | AV_PKT_DATA_WEBVTT_SETTINGS, | |
1090 | ||
1091 | /** | |
1092 | * A list of zero terminated key/value strings. There is no end marker for | |
1093 | * the list, so it is required to rely on the side data size to stop. This | |
1094 | * side data includes updated metadata which appeared in the stream. | |
1095 | */ | |
1096 | AV_PKT_DATA_METADATA_UPDATE, | |
1097 | }; | |
1098 | ||
1099 | typedef struct AVPacketSideData { | |
1100 | uint8_t *data; | |
1101 | int size; | |
1102 | enum AVPacketSideDataType type; | |
1103 | } AVPacketSideData; | |
1104 | ||
1105 | /** | |
1106 | * This structure stores compressed data. It is typically exported by demuxers | |
1107 | * and then passed as input to decoders, or received as output from encoders and | |
1108 | * then passed to muxers. | |
1109 | * | |
1110 | * For video, it should typically contain one compressed frame. For audio it may | |
1111 | * contain several compressed frames. | |
1112 | * | |
1113 | * AVPacket is one of the few structs in FFmpeg, whose size is a part of public | |
1114 | * ABI. Thus it may be allocated on stack and no new fields can be added to it | |
1115 | * without libavcodec and libavformat major bump. | |
1116 | * | |
1117 | * The semantics of data ownership depends on the buf or destruct (deprecated) | |
1118 | * fields. If either is set, the packet data is dynamically allocated and is | |
1119 | * valid indefinitely until av_free_packet() is called (which in turn calls | |
1120 | * av_buffer_unref()/the destruct callback to free the data). If neither is set, | |
1121 | * the packet data is typically backed by some static buffer somewhere and is | |
1122 | * only valid for a limited time (e.g. until the next read call when demuxing). | |
1123 | * | |
1124 | * The side data is always allocated with av_malloc() and is freed in | |
1125 | * av_free_packet(). | |
1126 | */ | |
1127 | typedef struct AVPacket { | |
1128 | /** | |
1129 | * A reference to the reference-counted buffer where the packet data is | |
1130 | * stored. | |
1131 | * May be NULL, then the packet data is not reference-counted. | |
1132 | */ | |
1133 | AVBufferRef *buf; | |
1134 | /** | |
1135 | * Presentation timestamp in AVStream->time_base units; the time at which | |
1136 | * the decompressed packet will be presented to the user. | |
1137 | * Can be AV_NOPTS_VALUE if it is not stored in the file. | |
1138 | * pts MUST be larger or equal to dts as presentation cannot happen before | |
1139 | * decompression, unless one wants to view hex dumps. Some formats misuse | |
1140 | * the terms dts and pts/cts to mean something different. Such timestamps | |
1141 | * must be converted to true pts/dts before they are stored in AVPacket. | |
1142 | */ | |
1143 | int64_t pts; | |
1144 | /** | |
1145 | * Decompression timestamp in AVStream->time_base units; the time at which | |
1146 | * the packet is decompressed. | |
1147 | * Can be AV_NOPTS_VALUE if it is not stored in the file. | |
1148 | */ | |
1149 | int64_t dts; | |
1150 | uint8_t *data; | |
1151 | int size; | |
1152 | int stream_index; | |
1153 | /** | |
1154 | * A combination of AV_PKT_FLAG values | |
1155 | */ | |
1156 | int flags; | |
1157 | /** | |
1158 | * Additional packet data that can be provided by the container. | |
1159 | * Packet can contain several types of side information. | |
1160 | */ | |
1161 | AVPacketSideData *side_data; | |
1162 | int side_data_elems; | |
1163 | ||
1164 | /** | |
1165 | * Duration of this packet in AVStream->time_base units, 0 if unknown. | |
1166 | * Equals next_pts - this_pts in presentation order. | |
1167 | */ | |
1168 | int duration; | |
1169 | #if FF_API_DESTRUCT_PACKET | |
1170 | attribute_deprecated | |
1171 | void (*destruct)(struct AVPacket *); | |
1172 | attribute_deprecated | |
1173 | void *priv; | |
1174 | #endif | |
1175 | int64_t pos; ///< byte position in stream, -1 if unknown | |
1176 | ||
1177 | /** | |
1178 | * Time difference in AVStream->time_base units from the pts of this | |
1179 | * packet to the point at which the output from the decoder has converged | |
1180 | * independent from the availability of previous frames. That is, the | |
1181 | * frames are virtually identical no matter if decoding started from | |
1182 | * the very first frame or from this keyframe. | |
1183 | * Is AV_NOPTS_VALUE if unknown. | |
1184 | * This field is not the display duration of the current packet. | |
1185 | * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY | |
1186 | * set. | |
1187 | * | |
1188 | * The purpose of this field is to allow seeking in streams that have no | |
1189 | * keyframes in the conventional sense. It corresponds to the | |
1190 | * recovery point SEI in H.264 and match_time_delta in NUT. It is also | |
1191 | * essential for some types of subtitle streams to ensure that all | |
1192 | * subtitles are correctly displayed after seeking. | |
1193 | */ | |
1194 | int64_t convergence_duration; | |
1195 | } AVPacket; | |
1196 | #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe | |
1197 | #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted | |
1198 | ||
1199 | enum AVSideDataParamChangeFlags { | |
1200 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, | |
1201 | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, | |
1202 | AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, | |
1203 | AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, | |
1204 | }; | |
1205 | /** | |
1206 | * @} | |
1207 | */ | |
1208 | ||
1209 | struct AVCodecInternal; | |
1210 | ||
1211 | enum AVFieldOrder { | |
1212 | AV_FIELD_UNKNOWN, | |
1213 | AV_FIELD_PROGRESSIVE, | |
1214 | AV_FIELD_TT, //< Top coded_first, top displayed first | |
1215 | AV_FIELD_BB, //< Bottom coded first, bottom displayed first | |
1216 | AV_FIELD_TB, //< Top coded first, bottom displayed first | |
1217 | AV_FIELD_BT, //< Bottom coded first, top displayed first | |
1218 | }; | |
1219 | ||
1220 | /** | |
1221 | * main external API structure. | |
1222 | * New fields can be added to the end with minor version bumps. | |
1223 | * Removal, reordering and changes to existing fields require a major | |
1224 | * version bump. | |
1225 | * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user | |
1226 | * applications. | |
1227 | * sizeof(AVCodecContext) must not be used outside libav*. | |
1228 | */ | |
1229 | typedef struct AVCodecContext { | |
1230 | /** | |
1231 | * information on struct for av_log | |
1232 | * - set by avcodec_alloc_context3 | |
1233 | */ | |
1234 | const AVClass *av_class; | |
1235 | int log_level_offset; | |
1236 | ||
1237 | enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ | |
1238 | const struct AVCodec *codec; | |
1239 | #if FF_API_CODEC_NAME | |
1240 | /** | |
1241 | * @deprecated this field is not used for anything in libavcodec | |
1242 | */ | |
1243 | attribute_deprecated | |
1244 | char codec_name[32]; | |
1245 | #endif | |
1246 | enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ | |
1247 | ||
1248 | /** | |
1249 | * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). | |
1250 | * This is used to work around some encoder bugs. | |
1251 | * A demuxer should set this to what is stored in the field used to identify the codec. | |
1252 | * If there are multiple such fields in a container then the demuxer should choose the one | |
1253 | * which maximizes the information about the used codec. | |
1254 | * If the codec tag field in a container is larger than 32 bits then the demuxer should | |
1255 | * remap the longer ID to 32 bits with a table or other structure. Alternatively a new | |
1256 | * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated | |
1257 | * first. | |
1258 | * - encoding: Set by user, if not then the default based on codec_id will be used. | |
1259 | * - decoding: Set by user, will be converted to uppercase by libavcodec during init. | |
1260 | */ | |
1261 | unsigned int codec_tag; | |
1262 | ||
1263 | /** | |
1264 | * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). | |
1265 | * This is used to work around some encoder bugs. | |
1266 | * - encoding: unused | |
1267 | * - decoding: Set by user, will be converted to uppercase by libavcodec during init. | |
1268 | */ | |
1269 | unsigned int stream_codec_tag; | |
1270 | ||
1271 | void *priv_data; | |
1272 | ||
1273 | /** | |
1274 | * Private context used for internal data. | |
1275 | * | |
1276 | * Unlike priv_data, this is not codec-specific. It is used in general | |
1277 | * libavcodec functions. | |
1278 | */ | |
1279 | struct AVCodecInternal *internal; | |
1280 | ||
1281 | /** | |
1282 | * Private data of the user, can be used to carry app specific stuff. | |
1283 | * - encoding: Set by user. | |
1284 | * - decoding: Set by user. | |
1285 | */ | |
1286 | void *opaque; | |
1287 | ||
1288 | /** | |
1289 | * the average bitrate | |
1290 | * - encoding: Set by user; unused for constant quantizer encoding. | |
1291 | * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream. | |
1292 | */ | |
1293 | int bit_rate; | |
1294 | ||
1295 | /** | |
1296 | * number of bits the bitstream is allowed to diverge from the reference. | |
1297 | * the reference can be CBR (for CBR pass1) or VBR (for pass2) | |
1298 | * - encoding: Set by user; unused for constant quantizer encoding. | |
1299 | * - decoding: unused | |
1300 | */ | |
1301 | int bit_rate_tolerance; | |
1302 | ||
1303 | /** | |
1304 | * Global quality for codecs which cannot change it per frame. | |
1305 | * This should be proportional to MPEG-1/2/4 qscale. | |
1306 | * - encoding: Set by user. | |
1307 | * - decoding: unused | |
1308 | */ | |
1309 | int global_quality; | |
1310 | ||
1311 | /** | |
1312 | * - encoding: Set by user. | |
1313 | * - decoding: unused | |
1314 | */ | |
1315 | int compression_level; | |
1316 | #define FF_COMPRESSION_DEFAULT -1 | |
1317 | ||
1318 | /** | |
1319 | * CODEC_FLAG_*. | |
1320 | * - encoding: Set by user. | |
1321 | * - decoding: Set by user. | |
1322 | */ | |
1323 | int flags; | |
1324 | ||
1325 | /** | |
1326 | * CODEC_FLAG2_* | |
1327 | * - encoding: Set by user. | |
1328 | * - decoding: Set by user. | |
1329 | */ | |
1330 | int flags2; | |
1331 | ||
1332 | /** | |
1333 | * some codecs need / can use extradata like Huffman tables. | |
1334 | * mjpeg: Huffman tables | |
1335 | * rv10: additional flags | |
1336 | * mpeg4: global headers (they can be in the bitstream or here) | |
1337 | * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger | |
1338 | * than extradata_size to avoid problems if it is read with the bitstream reader. | |
1339 | * The bytewise contents of extradata must not depend on the architecture or CPU endianness. | |
1340 | * - encoding: Set/allocated/freed by libavcodec. | |
1341 | * - decoding: Set/allocated/freed by user. | |
1342 | */ | |
1343 | uint8_t *extradata; | |
1344 | int extradata_size; | |
1345 | ||
1346 | /** | |
1347 | * This is the fundamental unit of time (in seconds) in terms | |
1348 | * of which frame timestamps are represented. For fixed-fps content, | |
1349 | * timebase should be 1/framerate and timestamp increments should be | |
1350 | * identically 1. | |
f6fa7814 DM |
1351 | * This often, but not always is the inverse of the frame rate or field rate |
1352 | * for video. | |
2ba45a60 | 1353 | * - encoding: MUST be set by user. |
f6fa7814 DM |
1354 | * - decoding: the use of this field for decoding is deprecated. |
1355 | * Use framerate instead. | |
2ba45a60 DM |
1356 | */ |
1357 | AVRational time_base; | |
1358 | ||
1359 | /** | |
1360 | * For some codecs, the time base is closer to the field rate than the frame rate. | |
1361 | * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration | |
1362 | * if no telecine is used ... | |
1363 | * | |
1364 | * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. | |
1365 | */ | |
1366 | int ticks_per_frame; | |
1367 | ||
1368 | /** | |
1369 | * Codec delay. | |
1370 | * | |
1371 | * Encoding: Number of frames delay there will be from the encoder input to | |
1372 | * the decoder output. (we assume the decoder matches the spec) | |
1373 | * Decoding: Number of frames delay in addition to what a standard decoder | |
1374 | * as specified in the spec would produce. | |
1375 | * | |
1376 | * Video: | |
1377 | * Number of frames the decoded output will be delayed relative to the | |
1378 | * encoded input. | |
1379 | * | |
1380 | * Audio: | |
f6fa7814 | 1381 | * For encoding, this field is unused (see initial_padding). |
2ba45a60 DM |
1382 | * |
1383 | * For decoding, this is the number of samples the decoder needs to | |
1384 | * output before the decoder's output is valid. When seeking, you should | |
1385 | * start decoding this many samples prior to your desired seek point. | |
1386 | * | |
1387 | * - encoding: Set by libavcodec. | |
1388 | * - decoding: Set by libavcodec. | |
1389 | */ | |
1390 | int delay; | |
1391 | ||
1392 | ||
1393 | /* video only */ | |
1394 | /** | |
1395 | * picture width / height. | |
1396 | * - encoding: MUST be set by user. | |
1397 | * - decoding: May be set by the user before opening the decoder if known e.g. | |
1398 | * from the container. Some decoders will require the dimensions | |
1399 | * to be set by the caller. During decoding, the decoder may | |
1400 | * overwrite those values as required. | |
1401 | */ | |
1402 | int width, height; | |
1403 | ||
1404 | /** | |
1405 | * Bitstream width / height, may be different from width/height e.g. when | |
1406 | * the decoded frame is cropped before being output or lowres is enabled. | |
1407 | * - encoding: unused | |
1408 | * - decoding: May be set by the user before opening the decoder if known | |
1409 | * e.g. from the container. During decoding, the decoder may | |
1410 | * overwrite those values as required. | |
1411 | */ | |
1412 | int coded_width, coded_height; | |
1413 | ||
1414 | #if FF_API_ASPECT_EXTENDED | |
1415 | #define FF_ASPECT_EXTENDED 15 | |
1416 | #endif | |
1417 | ||
1418 | /** | |
1419 | * the number of pictures in a group of pictures, or 0 for intra_only | |
1420 | * - encoding: Set by user. | |
1421 | * - decoding: unused | |
1422 | */ | |
1423 | int gop_size; | |
1424 | ||
1425 | /** | |
1426 | * Pixel format, see AV_PIX_FMT_xxx. | |
1427 | * May be set by the demuxer if known from headers. | |
1428 | * May be overridden by the decoder if it knows better. | |
1429 | * - encoding: Set by user. | |
1430 | * - decoding: Set by user if known, overridden by libavcodec if known | |
1431 | */ | |
1432 | enum AVPixelFormat pix_fmt; | |
1433 | ||
1434 | /** | |
1435 | * Motion estimation algorithm used for video coding. | |
1436 | * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), | |
1437 | * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific] | |
1438 | * - encoding: MUST be set by user. | |
1439 | * - decoding: unused | |
1440 | */ | |
1441 | int me_method; | |
1442 | ||
1443 | /** | |
1444 | * If non NULL, 'draw_horiz_band' is called by the libavcodec | |
1445 | * decoder to draw a horizontal band. It improves cache usage. Not | |
1446 | * all codecs can do that. You must check the codec capabilities | |
1447 | * beforehand. | |
1448 | * When multithreading is used, it may be called from multiple threads | |
1449 | * at the same time; threads might draw different parts of the same AVFrame, | |
1450 | * or multiple AVFrames, and there is no guarantee that slices will be drawn | |
1451 | * in order. | |
1452 | * The function is also used by hardware acceleration APIs. | |
1453 | * It is called at least once during frame decoding to pass | |
1454 | * the data needed for hardware render. | |
1455 | * In that mode instead of pixel data, AVFrame points to | |
1456 | * a structure specific to the acceleration API. The application | |
1457 | * reads the structure and can change some fields to indicate progress | |
1458 | * or mark state. | |
1459 | * - encoding: unused | |
1460 | * - decoding: Set by user. | |
1461 | * @param height the height of the slice | |
1462 | * @param y the y position of the slice | |
1463 | * @param type 1->top field, 2->bottom field, 3->frame | |
1464 | * @param offset offset into the AVFrame.data from which the slice should be read | |
1465 | */ | |
1466 | void (*draw_horiz_band)(struct AVCodecContext *s, | |
1467 | const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], | |
1468 | int y, int type, int height); | |
1469 | ||
1470 | /** | |
1471 | * callback to negotiate the pixelFormat | |
1472 | * @param fmt is the list of formats which are supported by the codec, | |
1473 | * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. | |
1474 | * The first is always the native one. | |
f6fa7814 DM |
1475 | * @note The callback may be called again immediately if initialization for |
1476 | * the selected (hardware-accelerated) pixel format failed. | |
1477 | * @warning Behavior is undefined if the callback returns a value not | |
1478 | * in the fmt list of formats. | |
2ba45a60 DM |
1479 | * @return the chosen format |
1480 | * - encoding: unused | |
1481 | * - decoding: Set by user, if not set the native format will be chosen. | |
1482 | */ | |
1483 | enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); | |
1484 | ||
1485 | /** | |
1486 | * maximum number of B-frames between non-B-frames | |
1487 | * Note: The output will be delayed by max_b_frames+1 relative to the input. | |
1488 | * - encoding: Set by user. | |
1489 | * - decoding: unused | |
1490 | */ | |
1491 | int max_b_frames; | |
1492 | ||
1493 | /** | |
1494 | * qscale factor between IP and B-frames | |
1495 | * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). | |
1496 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). | |
1497 | * - encoding: Set by user. | |
1498 | * - decoding: unused | |
1499 | */ | |
1500 | float b_quant_factor; | |
1501 | ||
1502 | /** obsolete FIXME remove */ | |
1503 | int rc_strategy; | |
1504 | #define FF_RC_STRATEGY_XVID 1 | |
1505 | ||
1506 | int b_frame_strategy; | |
1507 | ||
1508 | /** | |
1509 | * qscale offset between IP and B-frames | |
1510 | * - encoding: Set by user. | |
1511 | * - decoding: unused | |
1512 | */ | |
1513 | float b_quant_offset; | |
1514 | ||
1515 | /** | |
1516 | * Size of the frame reordering buffer in the decoder. | |
1517 | * For MPEG-2 it is 1 IPB or 0 low delay IP. | |
1518 | * - encoding: Set by libavcodec. | |
1519 | * - decoding: Set by libavcodec. | |
1520 | */ | |
1521 | int has_b_frames; | |
1522 | ||
1523 | /** | |
1524 | * 0-> h263 quant 1-> mpeg quant | |
1525 | * - encoding: Set by user. | |
1526 | * - decoding: unused | |
1527 | */ | |
1528 | int mpeg_quant; | |
1529 | ||
1530 | /** | |
1531 | * qscale factor between P and I-frames | |
1532 | * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset). | |
1533 | * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). | |
1534 | * - encoding: Set by user. | |
1535 | * - decoding: unused | |
1536 | */ | |
1537 | float i_quant_factor; | |
1538 | ||
1539 | /** | |
1540 | * qscale offset between P and I-frames | |
1541 | * - encoding: Set by user. | |
1542 | * - decoding: unused | |
1543 | */ | |
1544 | float i_quant_offset; | |
1545 | ||
1546 | /** | |
1547 | * luminance masking (0-> disabled) | |
1548 | * - encoding: Set by user. | |
1549 | * - decoding: unused | |
1550 | */ | |
1551 | float lumi_masking; | |
1552 | ||
1553 | /** | |
1554 | * temporary complexity masking (0-> disabled) | |
1555 | * - encoding: Set by user. | |
1556 | * - decoding: unused | |
1557 | */ | |
1558 | float temporal_cplx_masking; | |
1559 | ||
1560 | /** | |
1561 | * spatial complexity masking (0-> disabled) | |
1562 | * - encoding: Set by user. | |
1563 | * - decoding: unused | |
1564 | */ | |
1565 | float spatial_cplx_masking; | |
1566 | ||
1567 | /** | |
1568 | * p block masking (0-> disabled) | |
1569 | * - encoding: Set by user. | |
1570 | * - decoding: unused | |
1571 | */ | |
1572 | float p_masking; | |
1573 | ||
1574 | /** | |
1575 | * darkness masking (0-> disabled) | |
1576 | * - encoding: Set by user. | |
1577 | * - decoding: unused | |
1578 | */ | |
1579 | float dark_masking; | |
1580 | ||
1581 | /** | |
1582 | * slice count | |
1583 | * - encoding: Set by libavcodec. | |
1584 | * - decoding: Set by user (or 0). | |
1585 | */ | |
1586 | int slice_count; | |
1587 | /** | |
1588 | * prediction method (needed for huffyuv) | |
1589 | * - encoding: Set by user. | |
1590 | * - decoding: unused | |
1591 | */ | |
1592 | int prediction_method; | |
1593 | #define FF_PRED_LEFT 0 | |
1594 | #define FF_PRED_PLANE 1 | |
1595 | #define FF_PRED_MEDIAN 2 | |
1596 | ||
1597 | /** | |
1598 | * slice offsets in the frame in bytes | |
1599 | * - encoding: Set/allocated by libavcodec. | |
1600 | * - decoding: Set/allocated by user (or NULL). | |
1601 | */ | |
1602 | int *slice_offset; | |
1603 | ||
1604 | /** | |
1605 | * sample aspect ratio (0 if unknown) | |
1606 | * That is the width of a pixel divided by the height of the pixel. | |
1607 | * Numerator and denominator must be relatively prime and smaller than 256 for some video standards. | |
1608 | * - encoding: Set by user. | |
1609 | * - decoding: Set by libavcodec. | |
1610 | */ | |
1611 | AVRational sample_aspect_ratio; | |
1612 | ||
1613 | /** | |
1614 | * motion estimation comparison function | |
1615 | * - encoding: Set by user. | |
1616 | * - decoding: unused | |
1617 | */ | |
1618 | int me_cmp; | |
1619 | /** | |
1620 | * subpixel motion estimation comparison function | |
1621 | * - encoding: Set by user. | |
1622 | * - decoding: unused | |
1623 | */ | |
1624 | int me_sub_cmp; | |
1625 | /** | |
1626 | * macroblock comparison function (not supported yet) | |
1627 | * - encoding: Set by user. | |
1628 | * - decoding: unused | |
1629 | */ | |
1630 | int mb_cmp; | |
1631 | /** | |
1632 | * interlaced DCT comparison function | |
1633 | * - encoding: Set by user. | |
1634 | * - decoding: unused | |
1635 | */ | |
1636 | int ildct_cmp; | |
1637 | #define FF_CMP_SAD 0 | |
1638 | #define FF_CMP_SSE 1 | |
1639 | #define FF_CMP_SATD 2 | |
1640 | #define FF_CMP_DCT 3 | |
1641 | #define FF_CMP_PSNR 4 | |
1642 | #define FF_CMP_BIT 5 | |
1643 | #define FF_CMP_RD 6 | |
1644 | #define FF_CMP_ZERO 7 | |
1645 | #define FF_CMP_VSAD 8 | |
1646 | #define FF_CMP_VSSE 9 | |
1647 | #define FF_CMP_NSSE 10 | |
1648 | #define FF_CMP_W53 11 | |
1649 | #define FF_CMP_W97 12 | |
1650 | #define FF_CMP_DCTMAX 13 | |
1651 | #define FF_CMP_DCT264 14 | |
1652 | #define FF_CMP_CHROMA 256 | |
1653 | ||
1654 | /** | |
1655 | * ME diamond size & shape | |
1656 | * - encoding: Set by user. | |
1657 | * - decoding: unused | |
1658 | */ | |
1659 | int dia_size; | |
1660 | ||
1661 | /** | |
1662 | * amount of previous MV predictors (2a+1 x 2a+1 square) | |
1663 | * - encoding: Set by user. | |
1664 | * - decoding: unused | |
1665 | */ | |
1666 | int last_predictor_count; | |
1667 | ||
1668 | /** | |
1669 | * prepass for motion estimation | |
1670 | * - encoding: Set by user. | |
1671 | * - decoding: unused | |
1672 | */ | |
1673 | int pre_me; | |
1674 | ||
1675 | /** | |
1676 | * motion estimation prepass comparison function | |
1677 | * - encoding: Set by user. | |
1678 | * - decoding: unused | |
1679 | */ | |
1680 | int me_pre_cmp; | |
1681 | ||
1682 | /** | |
1683 | * ME prepass diamond size & shape | |
1684 | * - encoding: Set by user. | |
1685 | * - decoding: unused | |
1686 | */ | |
1687 | int pre_dia_size; | |
1688 | ||
1689 | /** | |
1690 | * subpel ME quality | |
1691 | * - encoding: Set by user. | |
1692 | * - decoding: unused | |
1693 | */ | |
1694 | int me_subpel_quality; | |
1695 | ||
1696 | #if FF_API_AFD | |
1697 | /** | |
1698 | * DTG active format information (additional aspect ratio | |
1699 | * information only used in DVB MPEG-2 transport streams) | |
1700 | * 0 if not set. | |
1701 | * | |
1702 | * - encoding: unused | |
1703 | * - decoding: Set by decoder. | |
1704 | * @deprecated Deprecated in favor of AVSideData | |
1705 | */ | |
1706 | attribute_deprecated int dtg_active_format; | |
1707 | #define FF_DTG_AFD_SAME 8 | |
1708 | #define FF_DTG_AFD_4_3 9 | |
1709 | #define FF_DTG_AFD_16_9 10 | |
1710 | #define FF_DTG_AFD_14_9 11 | |
1711 | #define FF_DTG_AFD_4_3_SP_14_9 13 | |
1712 | #define FF_DTG_AFD_16_9_SP_14_9 14 | |
1713 | #define FF_DTG_AFD_SP_4_3 15 | |
1714 | #endif /* FF_API_AFD */ | |
1715 | ||
1716 | /** | |
1717 | * maximum motion estimation search range in subpel units | |
1718 | * If 0 then no limit. | |
1719 | * | |
1720 | * - encoding: Set by user. | |
1721 | * - decoding: unused | |
1722 | */ | |
1723 | int me_range; | |
1724 | ||
1725 | /** | |
1726 | * intra quantizer bias | |
1727 | * - encoding: Set by user. | |
1728 | * - decoding: unused | |
1729 | */ | |
1730 | int intra_quant_bias; | |
1731 | #define FF_DEFAULT_QUANT_BIAS 999999 | |
1732 | ||
1733 | /** | |
1734 | * inter quantizer bias | |
1735 | * - encoding: Set by user. | |
1736 | * - decoding: unused | |
1737 | */ | |
1738 | int inter_quant_bias; | |
1739 | ||
1740 | /** | |
1741 | * slice flags | |
1742 | * - encoding: unused | |
1743 | * - decoding: Set by user. | |
1744 | */ | |
1745 | int slice_flags; | |
1746 | #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display | |
1747 | #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics) | |
1748 | #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) | |
1749 | ||
1750 | #if FF_API_XVMC | |
1751 | /** | |
1752 | * XVideo Motion Acceleration | |
1753 | * - encoding: forbidden | |
1754 | * - decoding: set by decoder | |
1755 | * @deprecated XvMC doesn't need it anymore. | |
1756 | */ | |
1757 | attribute_deprecated int xvmc_acceleration; | |
1758 | #endif /* FF_API_XVMC */ | |
1759 | ||
1760 | /** | |
1761 | * macroblock decision mode | |
1762 | * - encoding: Set by user. | |
1763 | * - decoding: unused | |
1764 | */ | |
1765 | int mb_decision; | |
1766 | #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp | |
1767 | #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits | |
1768 | #define FF_MB_DECISION_RD 2 ///< rate distortion | |
1769 | ||
1770 | /** | |
1771 | * custom intra quantization matrix | |
1772 | * - encoding: Set by user, can be NULL. | |
1773 | * - decoding: Set by libavcodec. | |
1774 | */ | |
1775 | uint16_t *intra_matrix; | |
1776 | ||
1777 | /** | |
1778 | * custom inter quantization matrix | |
1779 | * - encoding: Set by user, can be NULL. | |
1780 | * - decoding: Set by libavcodec. | |
1781 | */ | |
1782 | uint16_t *inter_matrix; | |
1783 | ||
1784 | /** | |
1785 | * scene change detection threshold | |
1786 | * 0 is default, larger means fewer detected scene changes. | |
1787 | * - encoding: Set by user. | |
1788 | * - decoding: unused | |
1789 | */ | |
1790 | int scenechange_threshold; | |
1791 | ||
1792 | /** | |
1793 | * noise reduction strength | |
1794 | * - encoding: Set by user. | |
1795 | * - decoding: unused | |
1796 | */ | |
1797 | int noise_reduction; | |
1798 | ||
f6fa7814 | 1799 | #if FF_API_MPV_OPT |
2ba45a60 | 1800 | /** |
f6fa7814 | 1801 | * @deprecated this field is unused |
2ba45a60 | 1802 | */ |
f6fa7814 | 1803 | attribute_deprecated |
2ba45a60 DM |
1804 | int me_threshold; |
1805 | ||
1806 | /** | |
f6fa7814 | 1807 | * @deprecated this field is unused |
2ba45a60 | 1808 | */ |
f6fa7814 | 1809 | attribute_deprecated |
2ba45a60 | 1810 | int mb_threshold; |
f6fa7814 | 1811 | #endif |
2ba45a60 DM |
1812 | |
1813 | /** | |
1814 | * precision of the intra DC coefficient - 8 | |
1815 | * - encoding: Set by user. | |
1816 | * - decoding: unused | |
1817 | */ | |
1818 | int intra_dc_precision; | |
1819 | ||
1820 | /** | |
1821 | * Number of macroblock rows at the top which are skipped. | |
1822 | * - encoding: unused | |
1823 | * - decoding: Set by user. | |
1824 | */ | |
1825 | int skip_top; | |
1826 | ||
1827 | /** | |
1828 | * Number of macroblock rows at the bottom which are skipped. | |
1829 | * - encoding: unused | |
1830 | * - decoding: Set by user. | |
1831 | */ | |
1832 | int skip_bottom; | |
1833 | ||
f6fa7814 | 1834 | #if FF_API_MPV_OPT |
2ba45a60 | 1835 | /** |
f6fa7814 | 1836 | * @deprecated use encoder private options instead |
2ba45a60 | 1837 | */ |
f6fa7814 | 1838 | attribute_deprecated |
2ba45a60 | 1839 | float border_masking; |
f6fa7814 | 1840 | #endif |
2ba45a60 DM |
1841 | |
1842 | /** | |
1843 | * minimum MB lagrange multipler | |
1844 | * - encoding: Set by user. | |
1845 | * - decoding: unused | |
1846 | */ | |
1847 | int mb_lmin; | |
1848 | ||
1849 | /** | |
1850 | * maximum MB lagrange multipler | |
1851 | * - encoding: Set by user. | |
1852 | * - decoding: unused | |
1853 | */ | |
1854 | int mb_lmax; | |
1855 | ||
1856 | /** | |
1857 | * | |
1858 | * - encoding: Set by user. | |
1859 | * - decoding: unused | |
1860 | */ | |
1861 | int me_penalty_compensation; | |
1862 | ||
1863 | /** | |
1864 | * | |
1865 | * - encoding: Set by user. | |
1866 | * - decoding: unused | |
1867 | */ | |
1868 | int bidir_refine; | |
1869 | ||
1870 | /** | |
1871 | * | |
1872 | * - encoding: Set by user. | |
1873 | * - decoding: unused | |
1874 | */ | |
1875 | int brd_scale; | |
1876 | ||
1877 | /** | |
1878 | * minimum GOP size | |
1879 | * - encoding: Set by user. | |
1880 | * - decoding: unused | |
1881 | */ | |
1882 | int keyint_min; | |
1883 | ||
1884 | /** | |
1885 | * number of reference frames | |
1886 | * - encoding: Set by user. | |
1887 | * - decoding: Set by lavc. | |
1888 | */ | |
1889 | int refs; | |
1890 | ||
1891 | /** | |
1892 | * chroma qp offset from luma | |
1893 | * - encoding: Set by user. | |
1894 | * - decoding: unused | |
1895 | */ | |
1896 | int chromaoffset; | |
1897 | ||
1898 | #if FF_API_UNUSED_MEMBERS | |
1899 | /** | |
1900 | * Multiplied by qscale for each frame and added to scene_change_score. | |
1901 | * - encoding: Set by user. | |
1902 | * - decoding: unused | |
1903 | */ | |
1904 | attribute_deprecated int scenechange_factor; | |
1905 | #endif | |
1906 | ||
1907 | /** | |
1908 | * | |
1909 | * Note: Value depends upon the compare function used for fullpel ME. | |
1910 | * - encoding: Set by user. | |
1911 | * - decoding: unused | |
1912 | */ | |
1913 | int mv0_threshold; | |
1914 | ||
1915 | /** | |
1916 | * Adjust sensitivity of b_frame_strategy 1. | |
1917 | * - encoding: Set by user. | |
1918 | * - decoding: unused | |
1919 | */ | |
1920 | int b_sensitivity; | |
1921 | ||
1922 | /** | |
1923 | * Chromaticity coordinates of the source primaries. | |
1924 | * - encoding: Set by user | |
1925 | * - decoding: Set by libavcodec | |
1926 | */ | |
1927 | enum AVColorPrimaries color_primaries; | |
1928 | ||
1929 | /** | |
1930 | * Color Transfer Characteristic. | |
1931 | * - encoding: Set by user | |
1932 | * - decoding: Set by libavcodec | |
1933 | */ | |
1934 | enum AVColorTransferCharacteristic color_trc; | |
1935 | ||
1936 | /** | |
1937 | * YUV colorspace type. | |
1938 | * - encoding: Set by user | |
1939 | * - decoding: Set by libavcodec | |
1940 | */ | |
1941 | enum AVColorSpace colorspace; | |
1942 | ||
1943 | /** | |
1944 | * MPEG vs JPEG YUV range. | |
1945 | * - encoding: Set by user | |
1946 | * - decoding: Set by libavcodec | |
1947 | */ | |
1948 | enum AVColorRange color_range; | |
1949 | ||
1950 | /** | |
1951 | * This defines the location of chroma samples. | |
1952 | * - encoding: Set by user | |
1953 | * - decoding: Set by libavcodec | |
1954 | */ | |
1955 | enum AVChromaLocation chroma_sample_location; | |
1956 | ||
1957 | /** | |
1958 | * Number of slices. | |
1959 | * Indicates number of picture subdivisions. Used for parallelized | |
1960 | * decoding. | |
1961 | * - encoding: Set by user | |
1962 | * - decoding: unused | |
1963 | */ | |
1964 | int slices; | |
1965 | ||
1966 | /** Field order | |
1967 | * - encoding: set by libavcodec | |
1968 | * - decoding: Set by user. | |
1969 | */ | |
1970 | enum AVFieldOrder field_order; | |
1971 | ||
1972 | /* audio only */ | |
1973 | int sample_rate; ///< samples per second | |
1974 | int channels; ///< number of audio channels | |
1975 | ||
1976 | /** | |
1977 | * audio sample format | |
1978 | * - encoding: Set by user. | |
1979 | * - decoding: Set by libavcodec. | |
1980 | */ | |
1981 | enum AVSampleFormat sample_fmt; ///< sample format | |
1982 | ||
1983 | /* The following data should not be initialized. */ | |
1984 | /** | |
1985 | * Number of samples per channel in an audio frame. | |
1986 | * | |
1987 | * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame | |
1988 | * except the last must contain exactly frame_size samples per channel. | |
1989 | * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the | |
1990 | * frame size is not restricted. | |
1991 | * - decoding: may be set by some decoders to indicate constant frame size | |
1992 | */ | |
1993 | int frame_size; | |
1994 | ||
1995 | /** | |
1996 | * Frame counter, set by libavcodec. | |
1997 | * | |
1998 | * - decoding: total number of frames returned from the decoder so far. | |
1999 | * - encoding: total number of frames passed to the encoder so far. | |
2000 | * | |
2001 | * @note the counter is not incremented if encoding/decoding resulted in | |
2002 | * an error. | |
2003 | */ | |
2004 | int frame_number; | |
2005 | ||
2006 | /** | |
2007 | * number of bytes per packet if constant and known or 0 | |
2008 | * Used by some WAV based audio codecs. | |
2009 | */ | |
2010 | int block_align; | |
2011 | ||
2012 | /** | |
2013 | * Audio cutoff bandwidth (0 means "automatic") | |
2014 | * - encoding: Set by user. | |
2015 | * - decoding: unused | |
2016 | */ | |
2017 | int cutoff; | |
2018 | ||
2019 | #if FF_API_REQUEST_CHANNELS | |
2020 | /** | |
2021 | * Decoder should decode to this many channels if it can (0 for default) | |
2022 | * - encoding: unused | |
2023 | * - decoding: Set by user. | |
2024 | * @deprecated Deprecated in favor of request_channel_layout. | |
2025 | */ | |
2026 | attribute_deprecated int request_channels; | |
2027 | #endif | |
2028 | ||
2029 | /** | |
2030 | * Audio channel layout. | |
2031 | * - encoding: set by user. | |
2032 | * - decoding: set by user, may be overwritten by libavcodec. | |
2033 | */ | |
2034 | uint64_t channel_layout; | |
2035 | ||
2036 | /** | |
2037 | * Request decoder to use this channel layout if it can (0 for default) | |
2038 | * - encoding: unused | |
2039 | * - decoding: Set by user. | |
2040 | */ | |
2041 | uint64_t request_channel_layout; | |
2042 | ||
2043 | /** | |
2044 | * Type of service that the audio stream conveys. | |
2045 | * - encoding: Set by user. | |
2046 | * - decoding: Set by libavcodec. | |
2047 | */ | |
2048 | enum AVAudioServiceType audio_service_type; | |
2049 | ||
2050 | /** | |
2051 | * desired sample format | |
2052 | * - encoding: Not used. | |
2053 | * - decoding: Set by user. | |
2054 | * Decoder will decode to this format if it can. | |
2055 | */ | |
2056 | enum AVSampleFormat request_sample_fmt; | |
2057 | ||
2058 | #if FF_API_GET_BUFFER | |
2059 | /** | |
2060 | * Called at the beginning of each frame to get a buffer for it. | |
2061 | * | |
2062 | * The function will set AVFrame.data[], AVFrame.linesize[]. | |
2063 | * AVFrame.extended_data[] must also be set, but it should be the same as | |
2064 | * AVFrame.data[] except for planar audio with more channels than can fit | |
2065 | * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as | |
2066 | * many data pointers as it can hold. | |
2067 | * | |
2068 | * if CODEC_CAP_DR1 is not set then get_buffer() must call | |
2069 | * avcodec_default_get_buffer() instead of providing buffers allocated by | |
2070 | * some other means. | |
2071 | * | |
2072 | * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't | |
2073 | * need it. avcodec_default_get_buffer() aligns the output buffer properly, | |
2074 | * but if get_buffer() is overridden then alignment considerations should | |
2075 | * be taken into account. | |
2076 | * | |
2077 | * @see avcodec_default_get_buffer() | |
2078 | * | |
2079 | * Video: | |
2080 | * | |
2081 | * If pic.reference is set then the frame will be read later by libavcodec. | |
2082 | * avcodec_align_dimensions2() should be used to find the required width and | |
2083 | * height, as they normally need to be rounded up to the next multiple of 16. | |
2084 | * | |
2085 | * If frame multithreading is used and thread_safe_callbacks is set, | |
2086 | * it may be called from a different thread, but not from more than one at | |
2087 | * once. Does not need to be reentrant. | |
2088 | * | |
2089 | * @see release_buffer(), reget_buffer() | |
2090 | * @see avcodec_align_dimensions2() | |
2091 | * | |
2092 | * Audio: | |
2093 | * | |
2094 | * Decoders request a buffer of a particular size by setting | |
2095 | * AVFrame.nb_samples prior to calling get_buffer(). The decoder may, | |
2096 | * however, utilize only part of the buffer by setting AVFrame.nb_samples | |
2097 | * to a smaller value in the output frame. | |
2098 | * | |
2099 | * Decoders cannot use the buffer after returning from | |
2100 | * avcodec_decode_audio4(), so they will not call release_buffer(), as it | |
2101 | * is assumed to be released immediately upon return. In some rare cases, | |
2102 | * a decoder may need to call get_buffer() more than once in a single | |
2103 | * call to avcodec_decode_audio4(). In that case, when get_buffer() is | |
2104 | * called again after it has already been called once, the previously | |
2105 | * acquired buffer is assumed to be released at that time and may not be | |
2106 | * reused by the decoder. | |
2107 | * | |
2108 | * As a convenience, av_samples_get_buffer_size() and | |
2109 | * av_samples_fill_arrays() in libavutil may be used by custom get_buffer() | |
2110 | * functions to find the required data size and to fill data pointers and | |
2111 | * linesize. In AVFrame.linesize, only linesize[0] may be set for audio | |
2112 | * since all planes must be the same size. | |
2113 | * | |
2114 | * @see av_samples_get_buffer_size(), av_samples_fill_arrays() | |
2115 | * | |
2116 | * - encoding: unused | |
2117 | * - decoding: Set by libavcodec, user can override. | |
2118 | * | |
2119 | * @deprecated use get_buffer2() | |
2120 | */ | |
2121 | attribute_deprecated | |
2122 | int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic); | |
2123 | ||
2124 | /** | |
2125 | * Called to release buffers which were allocated with get_buffer. | |
2126 | * A released buffer can be reused in get_buffer(). | |
2127 | * pic.data[*] must be set to NULL. | |
2128 | * May be called from a different thread if frame multithreading is used, | |
2129 | * but not by more than one thread at once, so does not need to be reentrant. | |
2130 | * - encoding: unused | |
2131 | * - decoding: Set by libavcodec, user can override. | |
2132 | * | |
2133 | * @deprecated custom freeing callbacks should be set from get_buffer2() | |
2134 | */ | |
2135 | attribute_deprecated | |
2136 | void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); | |
2137 | ||
2138 | /** | |
2139 | * Called at the beginning of a frame to get cr buffer for it. | |
2140 | * Buffer type (size, hints) must be the same. libavcodec won't check it. | |
2141 | * libavcodec will pass previous buffer in pic, function should return | |
2142 | * same buffer or new buffer with old frame "painted" into it. | |
2143 | * If pic.data[0] == NULL must behave like get_buffer(). | |
2144 | * if CODEC_CAP_DR1 is not set then reget_buffer() must call | |
2145 | * avcodec_default_reget_buffer() instead of providing buffers allocated by | |
2146 | * some other means. | |
2147 | * - encoding: unused | |
2148 | * - decoding: Set by libavcodec, user can override. | |
2149 | */ | |
2150 | attribute_deprecated | |
2151 | int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); | |
2152 | #endif | |
2153 | ||
2154 | /** | |
2155 | * This callback is called at the beginning of each frame to get data | |
2156 | * buffer(s) for it. There may be one contiguous buffer for all the data or | |
2157 | * there may be a buffer per each data plane or anything in between. What | |
2158 | * this means is, you may set however many entries in buf[] you feel necessary. | |
2159 | * Each buffer must be reference-counted using the AVBuffer API (see description | |
2160 | * of buf[] below). | |
2161 | * | |
2162 | * The following fields will be set in the frame before this callback is | |
2163 | * called: | |
2164 | * - format | |
2165 | * - width, height (video only) | |
2166 | * - sample_rate, channel_layout, nb_samples (audio only) | |
2167 | * Their values may differ from the corresponding values in | |
2168 | * AVCodecContext. This callback must use the frame values, not the codec | |
2169 | * context values, to calculate the required buffer size. | |
2170 | * | |
2171 | * This callback must fill the following fields in the frame: | |
2172 | * - data[] | |
2173 | * - linesize[] | |
2174 | * - extended_data: | |
2175 | * * if the data is planar audio with more than 8 channels, then this | |
2176 | * callback must allocate and fill extended_data to contain all pointers | |
2177 | * to all data planes. data[] must hold as many pointers as it can. | |
2178 | * extended_data must be allocated with av_malloc() and will be freed in | |
2179 | * av_frame_unref(). | |
2180 | * * otherwise exended_data must point to data | |
2181 | * - buf[] must contain one or more pointers to AVBufferRef structures. Each of | |
2182 | * the frame's data and extended_data pointers must be contained in these. That | |
2183 | * is, one AVBufferRef for each allocated chunk of memory, not necessarily one | |
2184 | * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), | |
2185 | * and av_buffer_ref(). | |
2186 | * - extended_buf and nb_extended_buf must be allocated with av_malloc() by | |
2187 | * this callback and filled with the extra buffers if there are more | |
2188 | * buffers than buf[] can hold. extended_buf will be freed in | |
2189 | * av_frame_unref(). | |
2190 | * | |
2191 | * If CODEC_CAP_DR1 is not set then get_buffer2() must call | |
2192 | * avcodec_default_get_buffer2() instead of providing buffers allocated by | |
2193 | * some other means. | |
2194 | * | |
2195 | * Each data plane must be aligned to the maximum required by the target | |
2196 | * CPU. | |
2197 | * | |
2198 | * @see avcodec_default_get_buffer2() | |
2199 | * | |
2200 | * Video: | |
2201 | * | |
2202 | * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused | |
2203 | * (read and/or written to if it is writable) later by libavcodec. | |
2204 | * | |
2205 | * avcodec_align_dimensions2() should be used to find the required width and | |
2206 | * height, as they normally need to be rounded up to the next multiple of 16. | |
2207 | * | |
2208 | * Some decoders do not support linesizes changing between frames. | |
2209 | * | |
2210 | * If frame multithreading is used and thread_safe_callbacks is set, | |
2211 | * this callback may be called from a different thread, but not from more | |
2212 | * than one at once. Does not need to be reentrant. | |
2213 | * | |
2214 | * @see avcodec_align_dimensions2() | |
2215 | * | |
2216 | * Audio: | |
2217 | * | |
2218 | * Decoders request a buffer of a particular size by setting | |
2219 | * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, | |
2220 | * however, utilize only part of the buffer by setting AVFrame.nb_samples | |
2221 | * to a smaller value in the output frame. | |
2222 | * | |
2223 | * As a convenience, av_samples_get_buffer_size() and | |
2224 | * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() | |
2225 | * functions to find the required data size and to fill data pointers and | |
2226 | * linesize. In AVFrame.linesize, only linesize[0] may be set for audio | |
2227 | * since all planes must be the same size. | |
2228 | * | |
2229 | * @see av_samples_get_buffer_size(), av_samples_fill_arrays() | |
2230 | * | |
2231 | * - encoding: unused | |
2232 | * - decoding: Set by libavcodec, user can override. | |
2233 | */ | |
2234 | int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags); | |
2235 | ||
2236 | /** | |
2237 | * If non-zero, the decoded audio and video frames returned from | |
2238 | * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted | |
2239 | * and are valid indefinitely. The caller must free them with | |
2240 | * av_frame_unref() when they are not needed anymore. | |
2241 | * Otherwise, the decoded frames must not be freed by the caller and are | |
2242 | * only valid until the next decode call. | |
2243 | * | |
2244 | * - encoding: unused | |
2245 | * - decoding: set by the caller before avcodec_open2(). | |
2246 | */ | |
2247 | int refcounted_frames; | |
2248 | ||
2249 | /* - encoding parameters */ | |
2250 | float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0) | |
2251 | float qblur; ///< amount of qscale smoothing over time (0.0-1.0) | |
2252 | ||
2253 | /** | |
2254 | * minimum quantizer | |
2255 | * - encoding: Set by user. | |
2256 | * - decoding: unused | |
2257 | */ | |
2258 | int qmin; | |
2259 | ||
2260 | /** | |
2261 | * maximum quantizer | |
2262 | * - encoding: Set by user. | |
2263 | * - decoding: unused | |
2264 | */ | |
2265 | int qmax; | |
2266 | ||
2267 | /** | |
2268 | * maximum quantizer difference between frames | |
2269 | * - encoding: Set by user. | |
2270 | * - decoding: unused | |
2271 | */ | |
2272 | int max_qdiff; | |
2273 | ||
f6fa7814 | 2274 | #if FF_API_MPV_OPT |
2ba45a60 | 2275 | /** |
f6fa7814 | 2276 | * @deprecated use encoder private options instead |
2ba45a60 | 2277 | */ |
f6fa7814 | 2278 | attribute_deprecated |
2ba45a60 DM |
2279 | float rc_qsquish; |
2280 | ||
f6fa7814 | 2281 | attribute_deprecated |
2ba45a60 | 2282 | float rc_qmod_amp; |
f6fa7814 | 2283 | attribute_deprecated |
2ba45a60 | 2284 | int rc_qmod_freq; |
f6fa7814 | 2285 | #endif |
2ba45a60 DM |
2286 | |
2287 | /** | |
2288 | * decoder bitstream buffer size | |
2289 | * - encoding: Set by user. | |
2290 | * - decoding: unused | |
2291 | */ | |
2292 | int rc_buffer_size; | |
2293 | ||
2294 | /** | |
2295 | * ratecontrol override, see RcOverride | |
2296 | * - encoding: Allocated/set/freed by user. | |
2297 | * - decoding: unused | |
2298 | */ | |
2299 | int rc_override_count; | |
2300 | RcOverride *rc_override; | |
2301 | ||
f6fa7814 | 2302 | #if FF_API_MPV_OPT |
2ba45a60 | 2303 | /** |
f6fa7814 | 2304 | * @deprecated use encoder private options instead |
2ba45a60 | 2305 | */ |
f6fa7814 | 2306 | attribute_deprecated |
2ba45a60 | 2307 | const char *rc_eq; |
f6fa7814 | 2308 | #endif |
2ba45a60 DM |
2309 | |
2310 | /** | |
2311 | * maximum bitrate | |
2312 | * - encoding: Set by user. | |
2313 | * - decoding: Set by libavcodec. | |
2314 | */ | |
2315 | int rc_max_rate; | |
2316 | ||
2317 | /** | |
2318 | * minimum bitrate | |
2319 | * - encoding: Set by user. | |
2320 | * - decoding: unused | |
2321 | */ | |
2322 | int rc_min_rate; | |
2323 | ||
f6fa7814 | 2324 | #if FF_API_MPV_OPT |
2ba45a60 | 2325 | /** |
f6fa7814 | 2326 | * @deprecated use encoder private options instead |
2ba45a60 | 2327 | */ |
f6fa7814 DM |
2328 | attribute_deprecated |
2329 | float rc_buffer_aggressivity; | |
2330 | ||
2331 | attribute_deprecated | |
2ba45a60 | 2332 | float rc_initial_cplx; |
f6fa7814 | 2333 | #endif |
2ba45a60 DM |
2334 | |
2335 | /** | |
2336 | * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. | |
2337 | * - encoding: Set by user. | |
2338 | * - decoding: unused. | |
2339 | */ | |
2340 | float rc_max_available_vbv_use; | |
2341 | ||
2342 | /** | |
2343 | * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. | |
2344 | * - encoding: Set by user. | |
2345 | * - decoding: unused. | |
2346 | */ | |
2347 | float rc_min_vbv_overflow_use; | |
2348 | ||
2349 | /** | |
2350 | * Number of bits which should be loaded into the rc buffer before decoding starts. | |
2351 | * - encoding: Set by user. | |
2352 | * - decoding: unused | |
2353 | */ | |
2354 | int rc_initial_buffer_occupancy; | |
2355 | ||
2356 | #define FF_CODER_TYPE_VLC 0 | |
2357 | #define FF_CODER_TYPE_AC 1 | |
2358 | #define FF_CODER_TYPE_RAW 2 | |
2359 | #define FF_CODER_TYPE_RLE 3 | |
2360 | #if FF_API_UNUSED_MEMBERS | |
2361 | #define FF_CODER_TYPE_DEFLATE 4 | |
2362 | #endif /* FF_API_UNUSED_MEMBERS */ | |
2363 | /** | |
2364 | * coder type | |
2365 | * - encoding: Set by user. | |
2366 | * - decoding: unused | |
2367 | */ | |
2368 | int coder_type; | |
2369 | ||
2370 | /** | |
2371 | * context model | |
2372 | * - encoding: Set by user. | |
2373 | * - decoding: unused | |
2374 | */ | |
2375 | int context_model; | |
2376 | ||
f6fa7814 | 2377 | #if FF_API_MPV_OPT |
2ba45a60 | 2378 | /** |
f6fa7814 | 2379 | * @deprecated use encoder private options instead |
2ba45a60 | 2380 | */ |
f6fa7814 | 2381 | attribute_deprecated |
2ba45a60 DM |
2382 | int lmin; |
2383 | ||
2384 | /** | |
f6fa7814 | 2385 | * @deprecated use encoder private options instead |
2ba45a60 | 2386 | */ |
f6fa7814 | 2387 | attribute_deprecated |
2ba45a60 | 2388 | int lmax; |
f6fa7814 | 2389 | #endif |
2ba45a60 DM |
2390 | |
2391 | /** | |
2392 | * frame skip threshold | |
2393 | * - encoding: Set by user. | |
2394 | * - decoding: unused | |
2395 | */ | |
2396 | int frame_skip_threshold; | |
2397 | ||
2398 | /** | |
2399 | * frame skip factor | |
2400 | * - encoding: Set by user. | |
2401 | * - decoding: unused | |
2402 | */ | |
2403 | int frame_skip_factor; | |
2404 | ||
2405 | /** | |
2406 | * frame skip exponent | |
2407 | * - encoding: Set by user. | |
2408 | * - decoding: unused | |
2409 | */ | |
2410 | int frame_skip_exp; | |
2411 | ||
2412 | /** | |
2413 | * frame skip comparison function | |
2414 | * - encoding: Set by user. | |
2415 | * - decoding: unused | |
2416 | */ | |
2417 | int frame_skip_cmp; | |
2418 | ||
2419 | /** | |
2420 | * trellis RD quantization | |
2421 | * - encoding: Set by user. | |
2422 | * - decoding: unused | |
2423 | */ | |
2424 | int trellis; | |
2425 | ||
2426 | /** | |
2427 | * - encoding: Set by user. | |
2428 | * - decoding: unused | |
2429 | */ | |
2430 | int min_prediction_order; | |
2431 | ||
2432 | /** | |
2433 | * - encoding: Set by user. | |
2434 | * - decoding: unused | |
2435 | */ | |
2436 | int max_prediction_order; | |
2437 | ||
2438 | /** | |
2439 | * GOP timecode frame start number | |
2440 | * - encoding: Set by user, in non drop frame format | |
2441 | * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset) | |
2442 | */ | |
2443 | int64_t timecode_frame_start; | |
2444 | ||
2445 | /* The RTP callback: This function is called */ | |
2446 | /* every time the encoder has a packet to send. */ | |
2447 | /* It depends on the encoder if the data starts */ | |
2448 | /* with a Start Code (it should). H.263 does. */ | |
2449 | /* mb_nb contains the number of macroblocks */ | |
2450 | /* encoded in the RTP payload. */ | |
2451 | void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); | |
2452 | ||
2453 | int rtp_payload_size; /* The size of the RTP payload: the coder will */ | |
2454 | /* do its best to deliver a chunk with size */ | |
2455 | /* below rtp_payload_size, the chunk will start */ | |
2456 | /* with a start code on some codecs like H.263. */ | |
2457 | /* This doesn't take account of any particular */ | |
2458 | /* headers inside the transmitted RTP payload. */ | |
2459 | ||
2460 | /* statistics, used for 2-pass encoding */ | |
2461 | int mv_bits; | |
2462 | int header_bits; | |
2463 | int i_tex_bits; | |
2464 | int p_tex_bits; | |
2465 | int i_count; | |
2466 | int p_count; | |
2467 | int skip_count; | |
2468 | int misc_bits; | |
2469 | ||
2470 | /** | |
2471 | * number of bits used for the previously encoded frame | |
2472 | * - encoding: Set by libavcodec. | |
2473 | * - decoding: unused | |
2474 | */ | |
2475 | int frame_bits; | |
2476 | ||
2477 | /** | |
2478 | * pass1 encoding statistics output buffer | |
2479 | * - encoding: Set by libavcodec. | |
2480 | * - decoding: unused | |
2481 | */ | |
2482 | char *stats_out; | |
2483 | ||
2484 | /** | |
2485 | * pass2 encoding statistics input buffer | |
2486 | * Concatenated stuff from stats_out of pass1 should be placed here. | |
2487 | * - encoding: Allocated/set/freed by user. | |
2488 | * - decoding: unused | |
2489 | */ | |
2490 | char *stats_in; | |
2491 | ||
2492 | /** | |
2493 | * Work around bugs in encoders which sometimes cannot be detected automatically. | |
2494 | * - encoding: Set by user | |
2495 | * - decoding: Set by user | |
2496 | */ | |
2497 | int workaround_bugs; | |
2498 | #define FF_BUG_AUTODETECT 1 ///< autodetection | |
2499 | #if FF_API_OLD_MSMPEG4 | |
2500 | #define FF_BUG_OLD_MSMPEG4 2 | |
2501 | #endif | |
2502 | #define FF_BUG_XVID_ILACE 4 | |
2503 | #define FF_BUG_UMP4 8 | |
2504 | #define FF_BUG_NO_PADDING 16 | |
2505 | #define FF_BUG_AMV 32 | |
2506 | #if FF_API_AC_VLC | |
2507 | #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. | |
2508 | #endif | |
2509 | #define FF_BUG_QPEL_CHROMA 64 | |
2510 | #define FF_BUG_STD_QPEL 128 | |
2511 | #define FF_BUG_QPEL_CHROMA2 256 | |
2512 | #define FF_BUG_DIRECT_BLOCKSIZE 512 | |
2513 | #define FF_BUG_EDGE 1024 | |
2514 | #define FF_BUG_HPEL_CHROMA 2048 | |
2515 | #define FF_BUG_DC_CLIP 4096 | |
2516 | #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders. | |
2517 | #define FF_BUG_TRUNCATED 16384 | |
2518 | ||
2519 | /** | |
2520 | * strictly follow the standard (MPEG4, ...). | |
2521 | * - encoding: Set by user. | |
2522 | * - decoding: Set by user. | |
2523 | * Setting this to STRICT or higher means the encoder and decoder will | |
2524 | * generally do stupid things, whereas setting it to unofficial or lower | |
2525 | * will mean the encoder might produce output that is not supported by all | |
2526 | * spec-compliant decoders. Decoders don't differentiate between normal, | |
2527 | * unofficial and experimental (that is, they always try to decode things | |
2528 | * when they can) unless they are explicitly asked to behave stupidly | |
2529 | * (=strictly conform to the specs) | |
2530 | */ | |
2531 | int strict_std_compliance; | |
2532 | #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. | |
2533 | #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. | |
2534 | #define FF_COMPLIANCE_NORMAL 0 | |
2535 | #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions | |
2536 | #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. | |
2537 | ||
2538 | /** | |
2539 | * error concealment flags | |
2540 | * - encoding: unused | |
2541 | * - decoding: Set by user. | |
2542 | */ | |
2543 | int error_concealment; | |
2544 | #define FF_EC_GUESS_MVS 1 | |
2545 | #define FF_EC_DEBLOCK 2 | |
2546 | #define FF_EC_FAVOR_INTER 256 | |
2547 | ||
2548 | /** | |
2549 | * debug | |
2550 | * - encoding: Set by user. | |
2551 | * - decoding: Set by user. | |
2552 | */ | |
2553 | int debug; | |
2554 | #define FF_DEBUG_PICT_INFO 1 | |
2555 | #define FF_DEBUG_RC 2 | |
2556 | #define FF_DEBUG_BITSTREAM 4 | |
2557 | #define FF_DEBUG_MB_TYPE 8 | |
2558 | #define FF_DEBUG_QP 16 | |
2559 | #if FF_API_DEBUG_MV | |
2560 | /** | |
2561 | * @deprecated this option does nothing | |
2562 | */ | |
2563 | #define FF_DEBUG_MV 32 | |
2564 | #endif | |
2565 | #define FF_DEBUG_DCT_COEFF 0x00000040 | |
2566 | #define FF_DEBUG_SKIP 0x00000080 | |
2567 | #define FF_DEBUG_STARTCODE 0x00000100 | |
2568 | #if FF_API_UNUSED_MEMBERS | |
2569 | #define FF_DEBUG_PTS 0x00000200 | |
2570 | #endif /* FF_API_UNUSED_MEMBERS */ | |
2571 | #define FF_DEBUG_ER 0x00000400 | |
2572 | #define FF_DEBUG_MMCO 0x00000800 | |
2573 | #define FF_DEBUG_BUGS 0x00001000 | |
2574 | #if FF_API_DEBUG_MV | |
2575 | #define FF_DEBUG_VIS_QP 0x00002000 ///< only access through AVOptions from outside libavcodec | |
2576 | #define FF_DEBUG_VIS_MB_TYPE 0x00004000 ///< only access through AVOptions from outside libavcodec | |
2577 | #endif | |
2578 | #define FF_DEBUG_BUFFERS 0x00008000 | |
2579 | #define FF_DEBUG_THREADS 0x00010000 | |
2580 | #define FF_DEBUG_NOMC 0x01000000 | |
2581 | ||
2582 | #if FF_API_DEBUG_MV | |
2583 | /** | |
2584 | * debug | |
2585 | * Code outside libavcodec should access this field using AVOptions | |
2586 | * - encoding: Set by user. | |
2587 | * - decoding: Set by user. | |
2588 | */ | |
2589 | int debug_mv; | |
2590 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames | |
2591 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames | |
2592 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames | |
2593 | #endif | |
2594 | ||
2595 | /** | |
2596 | * Error recognition; may misdetect some more or less valid parts as errors. | |
2597 | * - encoding: unused | |
2598 | * - decoding: Set by user. | |
2599 | */ | |
2600 | int err_recognition; | |
2601 | ||
2602 | /** | |
2603 | * Verify checksums embedded in the bitstream (could be of either encoded or | |
2604 | * decoded data, depending on the codec) and print an error message on mismatch. | |
2605 | * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the | |
2606 | * decoder returning an error. | |
2607 | */ | |
2608 | #define AV_EF_CRCCHECK (1<<0) | |
2609 | #define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations | |
2610 | #define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length | |
2611 | #define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection | |
2612 | ||
2613 | #define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue | |
2614 | #define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors | |
2615 | #define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors | |
2616 | #define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error | |
2617 | ||
2618 | ||
2619 | /** | |
2620 | * opaque 64bit number (generally a PTS) that will be reordered and | |
2621 | * output in AVFrame.reordered_opaque | |
2622 | * - encoding: unused | |
2623 | * - decoding: Set by user. | |
2624 | */ | |
2625 | int64_t reordered_opaque; | |
2626 | ||
2627 | /** | |
2628 | * Hardware accelerator in use | |
2629 | * - encoding: unused. | |
2630 | * - decoding: Set by libavcodec | |
2631 | */ | |
2632 | struct AVHWAccel *hwaccel; | |
2633 | ||
2634 | /** | |
2635 | * Hardware accelerator context. | |
2636 | * For some hardware accelerators, a global context needs to be | |
2637 | * provided by the user. In that case, this holds display-dependent | |
2638 | * data FFmpeg cannot instantiate itself. Please refer to the | |
2639 | * FFmpeg HW accelerator documentation to know how to fill this | |
2640 | * is. e.g. for VA API, this is a struct vaapi_context. | |
2641 | * - encoding: unused | |
2642 | * - decoding: Set by user | |
2643 | */ | |
2644 | void *hwaccel_context; | |
2645 | ||
2646 | /** | |
2647 | * error | |
2648 | * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. | |
2649 | * - decoding: unused | |
2650 | */ | |
2651 | uint64_t error[AV_NUM_DATA_POINTERS]; | |
2652 | ||
2653 | /** | |
2654 | * DCT algorithm, see FF_DCT_* below | |
2655 | * - encoding: Set by user. | |
2656 | * - decoding: unused | |
2657 | */ | |
2658 | int dct_algo; | |
2659 | #define FF_DCT_AUTO 0 | |
2660 | #define FF_DCT_FASTINT 1 | |
2661 | #if FF_API_UNUSED_MEMBERS | |
2662 | #define FF_DCT_INT 2 | |
2663 | #endif /* FF_API_UNUSED_MEMBERS */ | |
2664 | #define FF_DCT_MMX 3 | |
2665 | #define FF_DCT_ALTIVEC 5 | |
2666 | #define FF_DCT_FAAN 6 | |
2667 | ||
2668 | /** | |
2669 | * IDCT algorithm, see FF_IDCT_* below. | |
2670 | * - encoding: Set by user. | |
2671 | * - decoding: Set by user. | |
2672 | */ | |
2673 | int idct_algo; | |
2674 | #define FF_IDCT_AUTO 0 | |
2675 | #define FF_IDCT_INT 1 | |
2676 | #define FF_IDCT_SIMPLE 2 | |
2677 | #define FF_IDCT_SIMPLEMMX 3 | |
2678 | #define FF_IDCT_ARM 7 | |
2679 | #define FF_IDCT_ALTIVEC 8 | |
2680 | #if FF_API_ARCH_SH4 | |
2681 | #define FF_IDCT_SH4 9 | |
2682 | #endif | |
2683 | #define FF_IDCT_SIMPLEARM 10 | |
2684 | #if FF_API_UNUSED_MEMBERS | |
2685 | #define FF_IDCT_IPP 13 | |
2686 | #endif /* FF_API_UNUSED_MEMBERS */ | |
2687 | #define FF_IDCT_XVID 14 | |
2688 | #if FF_API_IDCT_XVIDMMX | |
2689 | #define FF_IDCT_XVIDMMX 14 | |
2690 | #endif /* FF_API_IDCT_XVIDMMX */ | |
2691 | #define FF_IDCT_SIMPLEARMV5TE 16 | |
2692 | #define FF_IDCT_SIMPLEARMV6 17 | |
2693 | #if FF_API_ARCH_SPARC | |
2694 | #define FF_IDCT_SIMPLEVIS 18 | |
2695 | #endif | |
2696 | #define FF_IDCT_FAAN 20 | |
2697 | #define FF_IDCT_SIMPLENEON 22 | |
2698 | #if FF_API_ARCH_ALPHA | |
2699 | #define FF_IDCT_SIMPLEALPHA 23 | |
2700 | #endif | |
2701 | #define FF_IDCT_SIMPLEAUTO 128 | |
2702 | ||
2703 | /** | |
2704 | * bits per sample/pixel from the demuxer (needed for huffyuv). | |
2705 | * - encoding: Set by libavcodec. | |
2706 | * - decoding: Set by user. | |
2707 | */ | |
2708 | int bits_per_coded_sample; | |
2709 | ||
2710 | /** | |
2711 | * Bits per sample/pixel of internal libavcodec pixel/sample format. | |
2712 | * - encoding: set by user. | |
2713 | * - decoding: set by libavcodec. | |
2714 | */ | |
2715 | int bits_per_raw_sample; | |
2716 | ||
2717 | #if FF_API_LOWRES | |
2718 | /** | |
2719 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size | |
2720 | * - encoding: unused | |
2721 | * - decoding: Set by user. | |
2722 | * Code outside libavcodec should access this field using: | |
2723 | * av_codec_{get,set}_lowres(avctx) | |
2724 | */ | |
2725 | int lowres; | |
2726 | #endif | |
2727 | ||
2728 | /** | |
2729 | * the picture in the bitstream | |
2730 | * - encoding: Set by libavcodec. | |
2731 | * - decoding: unused | |
2732 | */ | |
2733 | AVFrame *coded_frame; | |
2734 | ||
2735 | /** | |
2736 | * thread count | |
2737 | * is used to decide how many independent tasks should be passed to execute() | |
2738 | * - encoding: Set by user. | |
2739 | * - decoding: Set by user. | |
2740 | */ | |
2741 | int thread_count; | |
2742 | ||
2743 | /** | |
2744 | * Which multithreading methods to use. | |
2745 | * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, | |
2746 | * so clients which cannot provide future frames should not use it. | |
2747 | * | |
2748 | * - encoding: Set by user, otherwise the default is used. | |
2749 | * - decoding: Set by user, otherwise the default is used. | |
2750 | */ | |
2751 | int thread_type; | |
2752 | #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once | |
2753 | #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once | |
2754 | ||
2755 | /** | |
2756 | * Which multithreading methods are in use by the codec. | |
2757 | * - encoding: Set by libavcodec. | |
2758 | * - decoding: Set by libavcodec. | |
2759 | */ | |
2760 | int active_thread_type; | |
2761 | ||
2762 | /** | |
2763 | * Set by the client if its custom get_buffer() callback can be called | |
2764 | * synchronously from another thread, which allows faster multithreaded decoding. | |
2765 | * draw_horiz_band() will be called from other threads regardless of this setting. | |
2766 | * Ignored if the default get_buffer() is used. | |
2767 | * - encoding: Set by user. | |
2768 | * - decoding: Set by user. | |
2769 | */ | |
2770 | int thread_safe_callbacks; | |
2771 | ||
2772 | /** | |
2773 | * The codec may call this to execute several independent things. | |
2774 | * It will return only after finishing all tasks. | |
2775 | * The user may replace this with some multithreaded implementation, | |
2776 | * the default implementation will execute the parts serially. | |
2777 | * @param count the number of things to execute | |
2778 | * - encoding: Set by libavcodec, user can override. | |
2779 | * - decoding: Set by libavcodec, user can override. | |
2780 | */ | |
2781 | int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size); | |
2782 | ||
2783 | /** | |
2784 | * The codec may call this to execute several independent things. | |
2785 | * It will return only after finishing all tasks. | |
2786 | * The user may replace this with some multithreaded implementation, | |
2787 | * the default implementation will execute the parts serially. | |
2788 | * Also see avcodec_thread_init and e.g. the --enable-pthread configure option. | |
2789 | * @param c context passed also to func | |
2790 | * @param count the number of things to execute | |
2791 | * @param arg2 argument passed unchanged to func | |
2792 | * @param ret return values of executed functions, must have space for "count" values. May be NULL. | |
2793 | * @param func function that will be called count times, with jobnr from 0 to count-1. | |
2794 | * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no | |
2795 | * two instances of func executing at the same time will have the same threadnr. | |
2796 | * @return always 0 currently, but code should handle a future improvement where when any call to func | |
2797 | * returns < 0 no further calls to func may be done and < 0 is returned. | |
2798 | * - encoding: Set by libavcodec, user can override. | |
2799 | * - decoding: Set by libavcodec, user can override. | |
2800 | */ | |
2801 | int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); | |
2802 | ||
2803 | #if FF_API_THREAD_OPAQUE | |
2804 | /** | |
2805 | * @deprecated this field should not be used from outside of lavc | |
2806 | */ | |
2807 | attribute_deprecated | |
2808 | void *thread_opaque; | |
2809 | #endif | |
2810 | ||
2811 | /** | |
2812 | * noise vs. sse weight for the nsse comparison function | |
2813 | * - encoding: Set by user. | |
2814 | * - decoding: unused | |
2815 | */ | |
2816 | int nsse_weight; | |
2817 | ||
2818 | /** | |
2819 | * profile | |
2820 | * - encoding: Set by user. | |
2821 | * - decoding: Set by libavcodec. | |
2822 | */ | |
2823 | int profile; | |
2824 | #define FF_PROFILE_UNKNOWN -99 | |
2825 | #define FF_PROFILE_RESERVED -100 | |
2826 | ||
2827 | #define FF_PROFILE_AAC_MAIN 0 | |
2828 | #define FF_PROFILE_AAC_LOW 1 | |
2829 | #define FF_PROFILE_AAC_SSR 2 | |
2830 | #define FF_PROFILE_AAC_LTP 3 | |
2831 | #define FF_PROFILE_AAC_HE 4 | |
2832 | #define FF_PROFILE_AAC_HE_V2 28 | |
2833 | #define FF_PROFILE_AAC_LD 22 | |
2834 | #define FF_PROFILE_AAC_ELD 38 | |
2835 | #define FF_PROFILE_MPEG2_AAC_LOW 128 | |
2836 | #define FF_PROFILE_MPEG2_AAC_HE 131 | |
2837 | ||
2838 | #define FF_PROFILE_DTS 20 | |
2839 | #define FF_PROFILE_DTS_ES 30 | |
2840 | #define FF_PROFILE_DTS_96_24 40 | |
2841 | #define FF_PROFILE_DTS_HD_HRA 50 | |
2842 | #define FF_PROFILE_DTS_HD_MA 60 | |
2843 | ||
2844 | #define FF_PROFILE_MPEG2_422 0 | |
2845 | #define FF_PROFILE_MPEG2_HIGH 1 | |
2846 | #define FF_PROFILE_MPEG2_SS 2 | |
2847 | #define FF_PROFILE_MPEG2_SNR_SCALABLE 3 | |
2848 | #define FF_PROFILE_MPEG2_MAIN 4 | |
2849 | #define FF_PROFILE_MPEG2_SIMPLE 5 | |
2850 | ||
2851 | #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag | |
2852 | #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag | |
2853 | ||
2854 | #define FF_PROFILE_H264_BASELINE 66 | |
2855 | #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) | |
2856 | #define FF_PROFILE_H264_MAIN 77 | |
2857 | #define FF_PROFILE_H264_EXTENDED 88 | |
2858 | #define FF_PROFILE_H264_HIGH 100 | |
2859 | #define FF_PROFILE_H264_HIGH_10 110 | |
2860 | #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) | |
2861 | #define FF_PROFILE_H264_HIGH_422 122 | |
2862 | #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) | |
2863 | #define FF_PROFILE_H264_HIGH_444 144 | |
2864 | #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 | |
2865 | #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) | |
2866 | #define FF_PROFILE_H264_CAVLC_444 44 | |
2867 | ||
2868 | #define FF_PROFILE_VC1_SIMPLE 0 | |
2869 | #define FF_PROFILE_VC1_MAIN 1 | |
2870 | #define FF_PROFILE_VC1_COMPLEX 2 | |
2871 | #define FF_PROFILE_VC1_ADVANCED 3 | |
2872 | ||
2873 | #define FF_PROFILE_MPEG4_SIMPLE 0 | |
2874 | #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 | |
2875 | #define FF_PROFILE_MPEG4_CORE 2 | |
2876 | #define FF_PROFILE_MPEG4_MAIN 3 | |
2877 | #define FF_PROFILE_MPEG4_N_BIT 4 | |
2878 | #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 | |
2879 | #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 | |
2880 | #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 | |
2881 | #define FF_PROFILE_MPEG4_HYBRID 8 | |
2882 | #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 | |
2883 | #define FF_PROFILE_MPEG4_CORE_SCALABLE 10 | |
2884 | #define FF_PROFILE_MPEG4_ADVANCED_CODING 11 | |
2885 | #define FF_PROFILE_MPEG4_ADVANCED_CORE 12 | |
2886 | #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 | |
2887 | #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 | |
2888 | #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 | |
2889 | ||
2890 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0 | |
2891 | #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1 | |
2892 | #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2 | |
2893 | #define FF_PROFILE_JPEG2000_DCINEMA_2K 3 | |
2894 | #define FF_PROFILE_JPEG2000_DCINEMA_4K 4 | |
2895 | ||
2896 | ||
2897 | #define FF_PROFILE_HEVC_MAIN 1 | |
2898 | #define FF_PROFILE_HEVC_MAIN_10 2 | |
2899 | #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 | |
2900 | #define FF_PROFILE_HEVC_REXT 4 | |
2901 | ||
2902 | /** | |
2903 | * level | |
2904 | * - encoding: Set by user. | |
2905 | * - decoding: Set by libavcodec. | |
2906 | */ | |
2907 | int level; | |
2908 | #define FF_LEVEL_UNKNOWN -99 | |
2909 | ||
2910 | /** | |
2911 | * Skip loop filtering for selected frames. | |
2912 | * - encoding: unused | |
2913 | * - decoding: Set by user. | |
2914 | */ | |
2915 | enum AVDiscard skip_loop_filter; | |
2916 | ||
2917 | /** | |
2918 | * Skip IDCT/dequantization for selected frames. | |
2919 | * - encoding: unused | |
2920 | * - decoding: Set by user. | |
2921 | */ | |
2922 | enum AVDiscard skip_idct; | |
2923 | ||
2924 | /** | |
2925 | * Skip decoding for selected frames. | |
2926 | * - encoding: unused | |
2927 | * - decoding: Set by user. | |
2928 | */ | |
2929 | enum AVDiscard skip_frame; | |
2930 | ||
2931 | /** | |
2932 | * Header containing style information for text subtitles. | |
2933 | * For SUBTITLE_ASS subtitle type, it should contain the whole ASS | |
2934 | * [Script Info] and [V4+ Styles] section, plus the [Events] line and | |
2935 | * the Format line following. It shouldn't include any Dialogue line. | |
2936 | * - encoding: Set/allocated/freed by user (before avcodec_open2()) | |
2937 | * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) | |
2938 | */ | |
2939 | uint8_t *subtitle_header; | |
2940 | int subtitle_header_size; | |
2941 | ||
2942 | #if FF_API_ERROR_RATE | |
2943 | /** | |
2944 | * @deprecated use the 'error_rate' private AVOption of the mpegvideo | |
2945 | * encoders | |
2946 | */ | |
2947 | attribute_deprecated | |
2948 | int error_rate; | |
2949 | #endif | |
2950 | ||
2951 | #if FF_API_CODEC_PKT | |
2952 | /** | |
2953 | * @deprecated this field is not supposed to be accessed from outside lavc | |
2954 | */ | |
2955 | attribute_deprecated | |
2956 | AVPacket *pkt; | |
2957 | #endif | |
2958 | ||
2959 | /** | |
2960 | * VBV delay coded in the last frame (in periods of a 27 MHz clock). | |
2961 | * Used for compliant TS muxing. | |
2962 | * - encoding: Set by libavcodec. | |
2963 | * - decoding: unused. | |
2964 | */ | |
2965 | uint64_t vbv_delay; | |
2966 | ||
2967 | /** | |
2968 | * Encoding only. Allow encoders to output packets that do not contain any | |
2969 | * encoded data, only side data. | |
2970 | * | |
2971 | * Some encoders need to output such packets, e.g. to update some stream | |
2972 | * parameters at the end of encoding. | |
2973 | * | |
2974 | * All callers are strongly recommended to set this option to 1 and update | |
2975 | * their code to deal with such packets, since this behaviour may become | |
2976 | * always enabled in the future (then this option will be deprecated and | |
2977 | * later removed). To avoid ABI issues when this happens, the callers should | |
2978 | * use AVOptions to set this field. | |
2979 | */ | |
2980 | int side_data_only_packets; | |
2981 | ||
f6fa7814 DM |
2982 | /** |
2983 | * Audio only. The number of "priming" samples (padding) inserted by the | |
2984 | * encoder at the beginning of the audio. I.e. this number of leading | |
2985 | * decoded samples must be discarded by the caller to get the original audio | |
2986 | * without leading padding. | |
2987 | * | |
2988 | * - decoding: unused | |
2989 | * - encoding: Set by libavcodec. The timestamps on the output packets are | |
2990 | * adjusted by the encoder so that they always refer to the | |
2991 | * first sample of the data actually contained in the packet, | |
2992 | * including any added padding. E.g. if the timebase is | |
2993 | * 1/samplerate and the timestamp of the first input sample is | |
2994 | * 0, the timestamp of the first output packet will be | |
2995 | * -initial_padding. | |
2996 | */ | |
2997 | int initial_padding; | |
2998 | ||
2999 | /** | |
3000 | * - decoding: For codecs that store a framerate value in the compressed | |
3001 | * bitstream, the decoder may export it here. { 0, 1} when | |
3002 | * unknown. | |
3003 | * - encoding: unused | |
3004 | */ | |
3005 | AVRational framerate; | |
3006 | ||
2ba45a60 DM |
3007 | /** |
3008 | * Timebase in which pkt_dts/pts and AVPacket.dts/pts are. | |
3009 | * Code outside libavcodec should access this field using: | |
3010 | * av_codec_{get,set}_pkt_timebase(avctx) | |
3011 | * - encoding unused. | |
3012 | * - decoding set by user. | |
3013 | */ | |
3014 | AVRational pkt_timebase; | |
3015 | ||
3016 | /** | |
3017 | * AVCodecDescriptor | |
3018 | * Code outside libavcodec should access this field using: | |
3019 | * av_codec_{get,set}_codec_descriptor(avctx) | |
3020 | * - encoding: unused. | |
3021 | * - decoding: set by libavcodec. | |
3022 | */ | |
3023 | const AVCodecDescriptor *codec_descriptor; | |
3024 | ||
3025 | #if !FF_API_LOWRES | |
3026 | /** | |
3027 | * low resolution decoding, 1-> 1/2 size, 2->1/4 size | |
3028 | * - encoding: unused | |
3029 | * - decoding: Set by user. | |
3030 | * Code outside libavcodec should access this field using: | |
3031 | * av_codec_{get,set}_lowres(avctx) | |
3032 | */ | |
3033 | int lowres; | |
3034 | #endif | |
3035 | ||
3036 | /** | |
3037 | * Current statistics for PTS correction. | |
3038 | * - decoding: maintained and used by libavcodec, not intended to be used by user apps | |
3039 | * - encoding: unused | |
3040 | */ | |
3041 | int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far | |
3042 | int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far | |
3043 | int64_t pts_correction_last_pts; /// PTS of the last frame | |
3044 | int64_t pts_correction_last_dts; /// DTS of the last frame | |
3045 | ||
3046 | /** | |
3047 | * Character encoding of the input subtitles file. | |
3048 | * - decoding: set by user | |
3049 | * - encoding: unused | |
3050 | */ | |
3051 | char *sub_charenc; | |
3052 | ||
3053 | /** | |
3054 | * Subtitles character encoding mode. Formats or codecs might be adjusting | |
3055 | * this setting (if they are doing the conversion themselves for instance). | |
3056 | * - decoding: set by libavcodec | |
3057 | * - encoding: unused | |
3058 | */ | |
3059 | int sub_charenc_mode; | |
3060 | #define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance) | |
3061 | #define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself | |
3062 | #define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv | |
3063 | ||
3064 | /** | |
3065 | * Skip processing alpha if supported by codec. | |
3066 | * Note that if the format uses pre-multiplied alpha (common with VP6, | |
3067 | * and recommended due to better video quality/compression) | |
3068 | * the image will look as if alpha-blended onto a black background. | |
3069 | * However for formats that do not use pre-multiplied alpha | |
3070 | * there might be serious artefacts (though e.g. libswscale currently | |
3071 | * assumes pre-multiplied alpha anyway). | |
3072 | * Code outside libavcodec should access this field using AVOptions | |
3073 | * | |
3074 | * - decoding: set by user | |
3075 | * - encoding: unused | |
3076 | */ | |
3077 | int skip_alpha; | |
3078 | ||
3079 | /** | |
3080 | * Number of samples to skip after a discontinuity | |
3081 | * - decoding: unused | |
3082 | * - encoding: set by libavcodec | |
3083 | */ | |
3084 | int seek_preroll; | |
3085 | ||
3086 | #if !FF_API_DEBUG_MV | |
3087 | /** | |
3088 | * debug motion vectors | |
3089 | * Code outside libavcodec should access this field using AVOptions | |
3090 | * - encoding: Set by user. | |
3091 | * - decoding: Set by user. | |
3092 | */ | |
3093 | int debug_mv; | |
3094 | #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames | |
3095 | #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames | |
3096 | #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames | |
3097 | #endif | |
3098 | ||
3099 | /** | |
3100 | * custom intra quantization matrix | |
3101 | * Code outside libavcodec should access this field using av_codec_g/set_chroma_intra_matrix() | |
3102 | * - encoding: Set by user, can be NULL. | |
3103 | * - decoding: unused. | |
3104 | */ | |
3105 | uint16_t *chroma_intra_matrix; | |
f6fa7814 DM |
3106 | |
3107 | /** | |
3108 | * dump format separator. | |
3109 | * can be ", " or "\n " or anything else | |
3110 | * Code outside libavcodec should access this field using AVOptions | |
3111 | * (NO direct access). | |
3112 | * - encoding: Set by user. | |
3113 | * - decoding: Set by user. | |
3114 | */ | |
3115 | uint8_t *dump_separator; | |
3116 | ||
3117 | /** | |
3118 | * ',' separated list of allowed decoders. | |
3119 | * If NULL then all are allowed | |
3120 | * - encoding: unused | |
3121 | * - decoding: set by user through AVOPtions (NO direct access) | |
3122 | */ | |
3123 | char *codec_whitelist; | |
2ba45a60 DM |
3124 | } AVCodecContext; |
3125 | ||
3126 | AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx); | |
3127 | void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val); | |
3128 | ||
3129 | const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx); | |
3130 | void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc); | |
3131 | ||
3132 | int av_codec_get_lowres(const AVCodecContext *avctx); | |
3133 | void av_codec_set_lowres(AVCodecContext *avctx, int val); | |
3134 | ||
3135 | int av_codec_get_seek_preroll(const AVCodecContext *avctx); | |
3136 | void av_codec_set_seek_preroll(AVCodecContext *avctx, int val); | |
3137 | ||
3138 | uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx); | |
3139 | void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val); | |
3140 | ||
3141 | /** | |
3142 | * AVProfile. | |
3143 | */ | |
3144 | typedef struct AVProfile { | |
3145 | int profile; | |
3146 | const char *name; ///< short name for the profile | |
3147 | } AVProfile; | |
3148 | ||
3149 | typedef struct AVCodecDefault AVCodecDefault; | |
3150 | ||
3151 | struct AVSubtitle; | |
3152 | ||
3153 | /** | |
3154 | * AVCodec. | |
3155 | */ | |
3156 | typedef struct AVCodec { | |
3157 | /** | |
3158 | * Name of the codec implementation. | |
3159 | * The name is globally unique among encoders and among decoders (but an | |
3160 | * encoder and a decoder can share the same name). | |
3161 | * This is the primary way to find a codec from the user perspective. | |
3162 | */ | |
3163 | const char *name; | |
3164 | /** | |
3165 | * Descriptive name for the codec, meant to be more human readable than name. | |
3166 | * You should use the NULL_IF_CONFIG_SMALL() macro to define it. | |
3167 | */ | |
3168 | const char *long_name; | |
3169 | enum AVMediaType type; | |
3170 | enum AVCodecID id; | |
3171 | /** | |
3172 | * Codec capabilities. | |
3173 | * see CODEC_CAP_* | |
3174 | */ | |
3175 | int capabilities; | |
3176 | const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} | |
3177 | const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 | |
3178 | const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 | |
3179 | const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 | |
3180 | const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 | |
3181 | #if FF_API_LOWRES | |
3182 | uint8_t max_lowres; ///< maximum value for lowres supported by the decoder, no direct access, use av_codec_get_max_lowres() | |
3183 | #endif | |
3184 | const AVClass *priv_class; ///< AVClass for the private context | |
3185 | const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN} | |
3186 | ||
3187 | /***************************************************************** | |
3188 | * No fields below this line are part of the public API. They | |
3189 | * may not be used outside of libavcodec and can be changed and | |
3190 | * removed at will. | |
3191 | * New public fields should be added right above. | |
3192 | ***************************************************************** | |
3193 | */ | |
3194 | int priv_data_size; | |
3195 | struct AVCodec *next; | |
3196 | /** | |
3197 | * @name Frame-level threading support functions | |
3198 | * @{ | |
3199 | */ | |
3200 | /** | |
3201 | * If defined, called on thread contexts when they are created. | |
3202 | * If the codec allocates writable tables in init(), re-allocate them here. | |
3203 | * priv_data will be set to a copy of the original. | |
3204 | */ | |
3205 | int (*init_thread_copy)(AVCodecContext *); | |
3206 | /** | |
3207 | * Copy necessary context variables from a previous thread context to the current one. | |
3208 | * If not defined, the next thread will start automatically; otherwise, the codec | |
3209 | * must call ff_thread_finish_setup(). | |
3210 | * | |
3211 | * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. | |
3212 | */ | |
3213 | int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); | |
3214 | /** @} */ | |
3215 | ||
3216 | /** | |
3217 | * Private codec-specific defaults. | |
3218 | */ | |
3219 | const AVCodecDefault *defaults; | |
3220 | ||
3221 | /** | |
3222 | * Initialize codec static data, called from avcodec_register(). | |
3223 | */ | |
3224 | void (*init_static_data)(struct AVCodec *codec); | |
3225 | ||
3226 | int (*init)(AVCodecContext *); | |
3227 | int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, | |
3228 | const struct AVSubtitle *sub); | |
3229 | /** | |
3230 | * Encode data to an AVPacket. | |
3231 | * | |
3232 | * @param avctx codec context | |
3233 | * @param avpkt output AVPacket (may contain a user-provided buffer) | |
3234 | * @param[in] frame AVFrame containing the raw data to be encoded | |
3235 | * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a | |
3236 | * non-empty packet was returned in avpkt. | |
3237 | * @return 0 on success, negative error code on failure | |
3238 | */ | |
3239 | int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, | |
3240 | int *got_packet_ptr); | |
3241 | int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); | |
3242 | int (*close)(AVCodecContext *); | |
3243 | /** | |
3244 | * Flush buffers. | |
3245 | * Will be called when seeking | |
3246 | */ | |
3247 | void (*flush)(AVCodecContext *); | |
3248 | } AVCodec; | |
3249 | ||
3250 | int av_codec_get_max_lowres(const AVCodec *codec); | |
3251 | ||
3252 | struct MpegEncContext; | |
3253 | ||
3254 | /** | |
f6fa7814 DM |
3255 | * @defgroup lavc_hwaccel AVHWAccel |
3256 | * @{ | |
2ba45a60 DM |
3257 | */ |
3258 | typedef struct AVHWAccel { | |
3259 | /** | |
3260 | * Name of the hardware accelerated codec. | |
3261 | * The name is globally unique among encoders and among decoders (but an | |
3262 | * encoder and a decoder can share the same name). | |
3263 | */ | |
3264 | const char *name; | |
3265 | ||
3266 | /** | |
3267 | * Type of codec implemented by the hardware accelerator. | |
3268 | * | |
3269 | * See AVMEDIA_TYPE_xxx | |
3270 | */ | |
3271 | enum AVMediaType type; | |
3272 | ||
3273 | /** | |
3274 | * Codec implemented by the hardware accelerator. | |
3275 | * | |
3276 | * See AV_CODEC_ID_xxx | |
3277 | */ | |
3278 | enum AVCodecID id; | |
3279 | ||
3280 | /** | |
3281 | * Supported pixel format. | |
3282 | * | |
3283 | * Only hardware accelerated formats are supported here. | |
3284 | */ | |
3285 | enum AVPixelFormat pix_fmt; | |
3286 | ||
3287 | /** | |
3288 | * Hardware accelerated codec capabilities. | |
3289 | * see FF_HWACCEL_CODEC_CAP_* | |
3290 | */ | |
3291 | int capabilities; | |
3292 | ||
3293 | /***************************************************************** | |
3294 | * No fields below this line are part of the public API. They | |
3295 | * may not be used outside of libavcodec and can be changed and | |
3296 | * removed at will. | |
3297 | * New public fields should be added right above. | |
3298 | ***************************************************************** | |
3299 | */ | |
3300 | struct AVHWAccel *next; | |
3301 | ||
3302 | /** | |
3303 | * Allocate a custom buffer | |
3304 | */ | |
3305 | int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); | |
3306 | ||
3307 | /** | |
3308 | * Called at the beginning of each frame or field picture. | |
3309 | * | |
3310 | * Meaningful frame information (codec specific) is guaranteed to | |
3311 | * be parsed at this point. This function is mandatory. | |
3312 | * | |
3313 | * Note that buf can be NULL along with buf_size set to 0. | |
3314 | * Otherwise, this means the whole frame is available at this point. | |
3315 | * | |
3316 | * @param avctx the codec context | |
3317 | * @param buf the frame data buffer base | |
3318 | * @param buf_size the size of the frame in bytes | |
3319 | * @return zero if successful, a negative value otherwise | |
3320 | */ | |
3321 | int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); | |
3322 | ||
3323 | /** | |
3324 | * Callback for each slice. | |
3325 | * | |
3326 | * Meaningful slice information (codec specific) is guaranteed to | |
3327 | * be parsed at this point. This function is mandatory. | |
3328 | * The only exception is XvMC, that works on MB level. | |
3329 | * | |
3330 | * @param avctx the codec context | |
3331 | * @param buf the slice data buffer base | |
3332 | * @param buf_size the size of the slice in bytes | |
3333 | * @return zero if successful, a negative value otherwise | |
3334 | */ | |
3335 | int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); | |
3336 | ||
3337 | /** | |
3338 | * Called at the end of each frame or field picture. | |
3339 | * | |
3340 | * The whole picture is parsed at this point and can now be sent | |
3341 | * to the hardware accelerator. This function is mandatory. | |
3342 | * | |
3343 | * @param avctx the codec context | |
3344 | * @return zero if successful, a negative value otherwise | |
3345 | */ | |
3346 | int (*end_frame)(AVCodecContext *avctx); | |
3347 | ||
3348 | /** | |
3349 | * Size of per-frame hardware accelerator private data. | |
3350 | * | |
3351 | * Private data is allocated with av_mallocz() before | |
3352 | * AVCodecContext.get_buffer() and deallocated after | |
3353 | * AVCodecContext.release_buffer(). | |
3354 | */ | |
3355 | int frame_priv_data_size; | |
3356 | ||
3357 | /** | |
3358 | * Called for every Macroblock in a slice. | |
3359 | * | |
3360 | * XvMC uses it to replace the ff_mpv_decode_mb(). | |
3361 | * Instead of decoding to raw picture, MB parameters are | |
3362 | * stored in an array provided by the video driver. | |
3363 | * | |
3364 | * @param s the mpeg context | |
3365 | */ | |
3366 | void (*decode_mb)(struct MpegEncContext *s); | |
3367 | ||
3368 | /** | |
3369 | * Initialize the hwaccel private data. | |
3370 | * | |
3371 | * This will be called from ff_get_format(), after hwaccel and | |
3372 | * hwaccel_context are set and the hwaccel private data in AVCodecInternal | |
3373 | * is allocated. | |
3374 | */ | |
3375 | int (*init)(AVCodecContext *avctx); | |
3376 | ||
3377 | /** | |
3378 | * Uninitialize the hwaccel private data. | |
3379 | * | |
3380 | * This will be called from get_format() or avcodec_close(), after hwaccel | |
3381 | * and hwaccel_context are already uninitialized. | |
3382 | */ | |
3383 | int (*uninit)(AVCodecContext *avctx); | |
3384 | ||
3385 | /** | |
3386 | * Size of the private data to allocate in | |
3387 | * AVCodecInternal.hwaccel_priv_data. | |
3388 | */ | |
3389 | int priv_data_size; | |
3390 | } AVHWAccel; | |
3391 | ||
f6fa7814 DM |
3392 | /** |
3393 | * Hardware acceleration should be used for decoding even if the codec level | |
3394 | * used is unknown or higher than the maximum supported level reported by the | |
3395 | * hardware driver. | |
3396 | */ | |
3397 | #define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0) | |
3398 | ||
3399 | /** | |
3400 | * @} | |
3401 | */ | |
3402 | ||
2ba45a60 DM |
3403 | /** |
3404 | * @defgroup lavc_picture AVPicture | |
3405 | * | |
3406 | * Functions for working with AVPicture | |
3407 | * @{ | |
3408 | */ | |
3409 | ||
3410 | /** | |
3411 | * Picture data structure. | |
3412 | * | |
3413 | * Up to four components can be stored into it, the last component is | |
3414 | * alpha. | |
3415 | */ | |
3416 | typedef struct AVPicture { | |
3417 | uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes | |
3418 | int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line | |
3419 | } AVPicture; | |
3420 | ||
3421 | /** | |
3422 | * @} | |
3423 | */ | |
3424 | ||
3425 | enum AVSubtitleType { | |
3426 | SUBTITLE_NONE, | |
3427 | ||
3428 | SUBTITLE_BITMAP, ///< A bitmap, pict will be set | |
3429 | ||
3430 | /** | |
3431 | * Plain text, the text field must be set by the decoder and is | |
3432 | * authoritative. ass and pict fields may contain approximations. | |
3433 | */ | |
3434 | SUBTITLE_TEXT, | |
3435 | ||
3436 | /** | |
3437 | * Formatted text, the ass field must be set by the decoder and is | |
3438 | * authoritative. pict and text fields may contain approximations. | |
3439 | */ | |
3440 | SUBTITLE_ASS, | |
3441 | }; | |
3442 | ||
3443 | #define AV_SUBTITLE_FLAG_FORCED 0x00000001 | |
3444 | ||
3445 | typedef struct AVSubtitleRect { | |
3446 | int x; ///< top left corner of pict, undefined when pict is not set | |
3447 | int y; ///< top left corner of pict, undefined when pict is not set | |
3448 | int w; ///< width of pict, undefined when pict is not set | |
3449 | int h; ///< height of pict, undefined when pict is not set | |
3450 | int nb_colors; ///< number of colors in pict, undefined when pict is not set | |
3451 | ||
3452 | /** | |
3453 | * data+linesize for the bitmap of this subtitle. | |
3454 | * can be set for text/ass as well once they where rendered | |
3455 | */ | |
3456 | AVPicture pict; | |
3457 | enum AVSubtitleType type; | |
3458 | ||
3459 | char *text; ///< 0 terminated plain UTF-8 text | |
3460 | ||
3461 | /** | |
3462 | * 0 terminated ASS/SSA compatible event line. | |
3463 | * The presentation of this is unaffected by the other values in this | |
3464 | * struct. | |
3465 | */ | |
3466 | char *ass; | |
3467 | ||
3468 | int flags; | |
3469 | } AVSubtitleRect; | |
3470 | ||
3471 | typedef struct AVSubtitle { | |
3472 | uint16_t format; /* 0 = graphics */ | |
3473 | uint32_t start_display_time; /* relative to packet pts, in ms */ | |
3474 | uint32_t end_display_time; /* relative to packet pts, in ms */ | |
3475 | unsigned num_rects; | |
3476 | AVSubtitleRect **rects; | |
3477 | int64_t pts; ///< Same as packet pts, in AV_TIME_BASE | |
3478 | } AVSubtitle; | |
3479 | ||
3480 | /** | |
3481 | * If c is NULL, returns the first registered codec, | |
3482 | * if c is non-NULL, returns the next registered codec after c, | |
3483 | * or NULL if c is the last one. | |
3484 | */ | |
3485 | AVCodec *av_codec_next(const AVCodec *c); | |
3486 | ||
3487 | /** | |
3488 | * Return the LIBAVCODEC_VERSION_INT constant. | |
3489 | */ | |
3490 | unsigned avcodec_version(void); | |
3491 | ||
3492 | /** | |
3493 | * Return the libavcodec build-time configuration. | |
3494 | */ | |
3495 | const char *avcodec_configuration(void); | |
3496 | ||
3497 | /** | |
3498 | * Return the libavcodec license. | |
3499 | */ | |
3500 | const char *avcodec_license(void); | |
3501 | ||
3502 | /** | |
3503 | * Register the codec codec and initialize libavcodec. | |
3504 | * | |
3505 | * @warning either this function or avcodec_register_all() must be called | |
3506 | * before any other libavcodec functions. | |
3507 | * | |
3508 | * @see avcodec_register_all() | |
3509 | */ | |
3510 | void avcodec_register(AVCodec *codec); | |
3511 | ||
3512 | /** | |
3513 | * Register all the codecs, parsers and bitstream filters which were enabled at | |
3514 | * configuration time. If you do not call this function you can select exactly | |
3515 | * which formats you want to support, by using the individual registration | |
3516 | * functions. | |
3517 | * | |
3518 | * @see avcodec_register | |
3519 | * @see av_register_codec_parser | |
3520 | * @see av_register_bitstream_filter | |
3521 | */ | |
3522 | void avcodec_register_all(void); | |
3523 | ||
3524 | /** | |
3525 | * Allocate an AVCodecContext and set its fields to default values. The | |
3526 | * resulting struct should be freed with avcodec_free_context(). | |
3527 | * | |
3528 | * @param codec if non-NULL, allocate private data and initialize defaults | |
3529 | * for the given codec. It is illegal to then call avcodec_open2() | |
3530 | * with a different codec. | |
3531 | * If NULL, then the codec-specific defaults won't be initialized, | |
3532 | * which may result in suboptimal default settings (this is | |
3533 | * important mainly for encoders, e.g. libx264). | |
3534 | * | |
3535 | * @return An AVCodecContext filled with default values or NULL on failure. | |
3536 | * @see avcodec_get_context_defaults | |
3537 | */ | |
3538 | AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); | |
3539 | ||
3540 | /** | |
3541 | * Free the codec context and everything associated with it and write NULL to | |
3542 | * the provided pointer. | |
3543 | */ | |
3544 | void avcodec_free_context(AVCodecContext **avctx); | |
3545 | ||
3546 | /** | |
3547 | * Set the fields of the given AVCodecContext to default values corresponding | |
3548 | * to the given codec (defaults may be codec-dependent). | |
3549 | * | |
3550 | * Do not call this function if a non-NULL codec has been passed | |
3551 | * to avcodec_alloc_context3() that allocated this AVCodecContext. | |
3552 | * If codec is non-NULL, it is illegal to call avcodec_open2() with a | |
3553 | * different codec on this AVCodecContext. | |
3554 | */ | |
3555 | int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); | |
3556 | ||
3557 | /** | |
3558 | * Get the AVClass for AVCodecContext. It can be used in combination with | |
3559 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. | |
3560 | * | |
3561 | * @see av_opt_find(). | |
3562 | */ | |
3563 | const AVClass *avcodec_get_class(void); | |
3564 | ||
3565 | /** | |
3566 | * Get the AVClass for AVFrame. It can be used in combination with | |
3567 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. | |
3568 | * | |
3569 | * @see av_opt_find(). | |
3570 | */ | |
3571 | const AVClass *avcodec_get_frame_class(void); | |
3572 | ||
3573 | /** | |
3574 | * Get the AVClass for AVSubtitleRect. It can be used in combination with | |
3575 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. | |
3576 | * | |
3577 | * @see av_opt_find(). | |
3578 | */ | |
3579 | const AVClass *avcodec_get_subtitle_rect_class(void); | |
3580 | ||
3581 | /** | |
3582 | * Copy the settings of the source AVCodecContext into the destination | |
3583 | * AVCodecContext. The resulting destination codec context will be | |
3584 | * unopened, i.e. you are required to call avcodec_open2() before you | |
3585 | * can use this AVCodecContext to decode/encode video/audio data. | |
3586 | * | |
3587 | * @param dest target codec context, should be initialized with | |
3588 | * avcodec_alloc_context3(NULL), but otherwise uninitialized | |
3589 | * @param src source codec context | |
3590 | * @return AVERROR() on error (e.g. memory allocation error), 0 on success | |
3591 | */ | |
3592 | int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); | |
3593 | ||
3594 | #if FF_API_AVFRAME_LAVC | |
3595 | /** | |
3596 | * @deprecated use av_frame_alloc() | |
3597 | */ | |
3598 | attribute_deprecated | |
3599 | AVFrame *avcodec_alloc_frame(void); | |
3600 | ||
3601 | /** | |
3602 | * Set the fields of the given AVFrame to default values. | |
3603 | * | |
3604 | * @param frame The AVFrame of which the fields should be set to default values. | |
3605 | * | |
3606 | * @deprecated use av_frame_unref() | |
3607 | */ | |
3608 | attribute_deprecated | |
3609 | void avcodec_get_frame_defaults(AVFrame *frame); | |
3610 | ||
3611 | /** | |
3612 | * Free the frame and any dynamically allocated objects in it, | |
3613 | * e.g. extended_data. | |
3614 | * | |
3615 | * @param frame frame to be freed. The pointer will be set to NULL. | |
3616 | * | |
3617 | * @warning this function does NOT free the data buffers themselves | |
3618 | * (it does not know how, since they might have been allocated with | |
3619 | * a custom get_buffer()). | |
3620 | * | |
3621 | * @deprecated use av_frame_free() | |
3622 | */ | |
3623 | attribute_deprecated | |
3624 | void avcodec_free_frame(AVFrame **frame); | |
3625 | #endif | |
3626 | ||
3627 | /** | |
3628 | * Initialize the AVCodecContext to use the given AVCodec. Prior to using this | |
3629 | * function the context has to be allocated with avcodec_alloc_context3(). | |
3630 | * | |
3631 | * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), | |
3632 | * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for | |
3633 | * retrieving a codec. | |
3634 | * | |
3635 | * @warning This function is not thread safe! | |
3636 | * | |
3637 | * @code | |
3638 | * avcodec_register_all(); | |
3639 | * av_dict_set(&opts, "b", "2.5M", 0); | |
3640 | * codec = avcodec_find_decoder(AV_CODEC_ID_H264); | |
3641 | * if (!codec) | |
3642 | * exit(1); | |
3643 | * | |
3644 | * context = avcodec_alloc_context3(codec); | |
3645 | * | |
3646 | * if (avcodec_open2(context, codec, opts) < 0) | |
3647 | * exit(1); | |
3648 | * @endcode | |
3649 | * | |
3650 | * @param avctx The context to initialize. | |
3651 | * @param codec The codec to open this context for. If a non-NULL codec has been | |
3652 | * previously passed to avcodec_alloc_context3() or | |
3653 | * avcodec_get_context_defaults3() for this context, then this | |
3654 | * parameter MUST be either NULL or equal to the previously passed | |
3655 | * codec. | |
3656 | * @param options A dictionary filled with AVCodecContext and codec-private options. | |
3657 | * On return this object will be filled with options that were not found. | |
3658 | * | |
3659 | * @return zero on success, a negative value on error | |
3660 | * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), | |
3661 | * av_dict_set(), av_opt_find(). | |
3662 | */ | |
3663 | int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); | |
3664 | ||
3665 | /** | |
3666 | * Close a given AVCodecContext and free all the data associated with it | |
3667 | * (but not the AVCodecContext itself). | |
3668 | * | |
3669 | * Calling this function on an AVCodecContext that hasn't been opened will free | |
3670 | * the codec-specific data allocated in avcodec_alloc_context3() / | |
3671 | * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will | |
3672 | * do nothing. | |
3673 | */ | |
3674 | int avcodec_close(AVCodecContext *avctx); | |
3675 | ||
3676 | /** | |
3677 | * Free all allocated data in the given subtitle struct. | |
3678 | * | |
3679 | * @param sub AVSubtitle to free. | |
3680 | */ | |
3681 | void avsubtitle_free(AVSubtitle *sub); | |
3682 | ||
3683 | /** | |
3684 | * @} | |
3685 | */ | |
3686 | ||
3687 | /** | |
3688 | * @addtogroup lavc_packet | |
3689 | * @{ | |
3690 | */ | |
3691 | ||
3692 | #if FF_API_DESTRUCT_PACKET | |
3693 | /** | |
3694 | * Default packet destructor. | |
3695 | * @deprecated use the AVBuffer API instead | |
3696 | */ | |
3697 | attribute_deprecated | |
3698 | void av_destruct_packet(AVPacket *pkt); | |
3699 | #endif | |
3700 | ||
3701 | /** | |
3702 | * Initialize optional fields of a packet with default values. | |
3703 | * | |
3704 | * Note, this does not touch the data and size members, which have to be | |
3705 | * initialized separately. | |
3706 | * | |
3707 | * @param pkt packet | |
3708 | */ | |
3709 | void av_init_packet(AVPacket *pkt); | |
3710 | ||
3711 | /** | |
3712 | * Allocate the payload of a packet and initialize its fields with | |
3713 | * default values. | |
3714 | * | |
3715 | * @param pkt packet | |
3716 | * @param size wanted payload size | |
3717 | * @return 0 if OK, AVERROR_xxx otherwise | |
3718 | */ | |
3719 | int av_new_packet(AVPacket *pkt, int size); | |
3720 | ||
3721 | /** | |
3722 | * Reduce packet size, correctly zeroing padding | |
3723 | * | |
3724 | * @param pkt packet | |
3725 | * @param size new size | |
3726 | */ | |
3727 | void av_shrink_packet(AVPacket *pkt, int size); | |
3728 | ||
3729 | /** | |
3730 | * Increase packet size, correctly zeroing padding | |
3731 | * | |
3732 | * @param pkt packet | |
3733 | * @param grow_by number of bytes by which to increase the size of the packet | |
3734 | */ | |
3735 | int av_grow_packet(AVPacket *pkt, int grow_by); | |
3736 | ||
3737 | /** | |
3738 | * Initialize a reference-counted packet from av_malloc()ed data. | |
3739 | * | |
3740 | * @param pkt packet to be initialized. This function will set the data, size, | |
3741 | * buf and destruct fields, all others are left untouched. | |
3742 | * @param data Data allocated by av_malloc() to be used as packet data. If this | |
3743 | * function returns successfully, the data is owned by the underlying AVBuffer. | |
3744 | * The caller may not access the data through other means. | |
3745 | * @param size size of data in bytes, without the padding. I.e. the full buffer | |
3746 | * size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE. | |
3747 | * | |
3748 | * @return 0 on success, a negative AVERROR on error | |
3749 | */ | |
3750 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size); | |
3751 | ||
3752 | /** | |
3753 | * @warning This is a hack - the packet memory allocation stuff is broken. The | |
3754 | * packet is allocated if it was not really allocated. | |
3755 | */ | |
3756 | int av_dup_packet(AVPacket *pkt); | |
3757 | ||
3758 | /** | |
3759 | * Copy packet, including contents | |
3760 | * | |
3761 | * @return 0 on success, negative AVERROR on fail | |
3762 | */ | |
3763 | int av_copy_packet(AVPacket *dst, const AVPacket *src); | |
3764 | ||
3765 | /** | |
3766 | * Copy packet side data | |
3767 | * | |
3768 | * @return 0 on success, negative AVERROR on fail | |
3769 | */ | |
3770 | int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src); | |
3771 | ||
3772 | /** | |
3773 | * Free a packet. | |
3774 | * | |
3775 | * @param pkt packet to free | |
3776 | */ | |
3777 | void av_free_packet(AVPacket *pkt); | |
3778 | ||
3779 | /** | |
3780 | * Allocate new information of a packet. | |
3781 | * | |
3782 | * @param pkt packet | |
3783 | * @param type side information type | |
3784 | * @param size side information size | |
3785 | * @return pointer to fresh allocated data or NULL otherwise | |
3786 | */ | |
3787 | uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
3788 | int size); | |
3789 | ||
3790 | /** | |
3791 | * Shrink the already allocated side data buffer | |
3792 | * | |
3793 | * @param pkt packet | |
3794 | * @param type side information type | |
3795 | * @param size new side information size | |
3796 | * @return 0 on success, < 0 on failure | |
3797 | */ | |
3798 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
3799 | int size); | |
3800 | ||
3801 | /** | |
3802 | * Get side information from packet. | |
3803 | * | |
3804 | * @param pkt packet | |
3805 | * @param type desired side information type | |
3806 | * @param size pointer for side information size to store (optional) | |
3807 | * @return pointer to data if present or NULL otherwise | |
3808 | */ | |
3809 | uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
3810 | int *size); | |
3811 | ||
3812 | int av_packet_merge_side_data(AVPacket *pkt); | |
3813 | ||
3814 | int av_packet_split_side_data(AVPacket *pkt); | |
3815 | ||
3816 | /** | |
3817 | * Pack a dictionary for use in side_data. | |
3818 | * | |
3819 | * @param dict The dictionary to pack. | |
3820 | * @param size pointer to store the size of the returned data | |
3821 | * @return pointer to data if successful, NULL otherwise | |
3822 | */ | |
3823 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size); | |
3824 | /** | |
3825 | * Unpack a dictionary from side_data. | |
3826 | * | |
3827 | * @param data data from side_data | |
3828 | * @param size size of the data | |
3829 | * @param dict the metadata storage dictionary | |
3830 | * @return 0 on success, < 0 on failure | |
3831 | */ | |
3832 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict); | |
3833 | ||
3834 | ||
3835 | /** | |
3836 | * Convenience function to free all the side data stored. | |
3837 | * All the other fields stay untouched. | |
3838 | * | |
3839 | * @param pkt packet | |
3840 | */ | |
3841 | void av_packet_free_side_data(AVPacket *pkt); | |
3842 | ||
3843 | /** | |
3844 | * Setup a new reference to the data described by a given packet | |
3845 | * | |
3846 | * If src is reference-counted, setup dst as a new reference to the | |
3847 | * buffer in src. Otherwise allocate a new buffer in dst and copy the | |
3848 | * data from src into it. | |
3849 | * | |
3850 | * All the other fields are copied from src. | |
3851 | * | |
3852 | * @see av_packet_unref | |
3853 | * | |
3854 | * @param dst Destination packet | |
3855 | * @param src Source packet | |
3856 | * | |
3857 | * @return 0 on success, a negative AVERROR on error. | |
3858 | */ | |
3859 | int av_packet_ref(AVPacket *dst, const AVPacket *src); | |
3860 | ||
3861 | /** | |
3862 | * Wipe the packet. | |
3863 | * | |
3864 | * Unreference the buffer referenced by the packet and reset the | |
3865 | * remaining packet fields to their default values. | |
3866 | * | |
3867 | * @param pkt The packet to be unreferenced. | |
3868 | */ | |
3869 | void av_packet_unref(AVPacket *pkt); | |
3870 | ||
3871 | /** | |
3872 | * Move every field in src to dst and reset src. | |
3873 | * | |
3874 | * @see av_packet_unref | |
3875 | * | |
3876 | * @param src Source packet, will be reset | |
3877 | * @param dst Destination packet | |
3878 | */ | |
3879 | void av_packet_move_ref(AVPacket *dst, AVPacket *src); | |
3880 | ||
3881 | /** | |
3882 | * Copy only "properties" fields from src to dst. | |
3883 | * | |
3884 | * Properties for the purpose of this function are all the fields | |
3885 | * beside those related to the packet data (buf, data, size) | |
3886 | * | |
3887 | * @param dst Destination packet | |
3888 | * @param src Source packet | |
3889 | * | |
3890 | * @return 0 on success AVERROR on failure. | |
3891 | * | |
3892 | */ | |
3893 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src); | |
3894 | ||
3895 | /** | |
3896 | * Convert valid timing fields (timestamps / durations) in a packet from one | |
3897 | * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be | |
3898 | * ignored. | |
3899 | * | |
3900 | * @param pkt packet on which the conversion will be performed | |
3901 | * @param tb_src source timebase, in which the timing fields in pkt are | |
3902 | * expressed | |
3903 | * @param tb_dst destination timebase, to which the timing fields will be | |
3904 | * converted | |
3905 | */ | |
3906 | void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); | |
3907 | ||
3908 | /** | |
3909 | * @} | |
3910 | */ | |
3911 | ||
3912 | /** | |
3913 | * @addtogroup lavc_decoding | |
3914 | * @{ | |
3915 | */ | |
3916 | ||
3917 | /** | |
3918 | * Find a registered decoder with a matching codec ID. | |
3919 | * | |
3920 | * @param id AVCodecID of the requested decoder | |
3921 | * @return A decoder if one was found, NULL otherwise. | |
3922 | */ | |
3923 | AVCodec *avcodec_find_decoder(enum AVCodecID id); | |
3924 | ||
3925 | /** | |
3926 | * Find a registered decoder with the specified name. | |
3927 | * | |
3928 | * @param name name of the requested decoder | |
3929 | * @return A decoder if one was found, NULL otherwise. | |
3930 | */ | |
3931 | AVCodec *avcodec_find_decoder_by_name(const char *name); | |
3932 | ||
3933 | #if FF_API_GET_BUFFER | |
3934 | attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic); | |
3935 | attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic); | |
3936 | attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic); | |
3937 | #endif | |
3938 | ||
3939 | /** | |
3940 | * The default callback for AVCodecContext.get_buffer2(). It is made public so | |
3941 | * it can be called by custom get_buffer2() implementations for decoders without | |
3942 | * CODEC_CAP_DR1 set. | |
3943 | */ | |
3944 | int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags); | |
3945 | ||
3946 | #if FF_API_EMU_EDGE | |
3947 | /** | |
3948 | * Return the amount of padding in pixels which the get_buffer callback must | |
3949 | * provide around the edge of the image for codecs which do not have the | |
3950 | * CODEC_FLAG_EMU_EDGE flag. | |
3951 | * | |
3952 | * @return Required padding in pixels. | |
3953 | * | |
3954 | * @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer | |
3955 | * needed | |
3956 | */ | |
3957 | attribute_deprecated | |
3958 | unsigned avcodec_get_edge_width(void); | |
3959 | #endif | |
3960 | ||
3961 | /** | |
3962 | * Modify width and height values so that they will result in a memory | |
3963 | * buffer that is acceptable for the codec if you do not use any horizontal | |
3964 | * padding. | |
3965 | * | |
3966 | * May only be used if a codec with CODEC_CAP_DR1 has been opened. | |
3967 | */ | |
3968 | void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); | |
3969 | ||
3970 | /** | |
3971 | * Modify width and height values so that they will result in a memory | |
3972 | * buffer that is acceptable for the codec if you also ensure that all | |
3973 | * line sizes are a multiple of the respective linesize_align[i]. | |
3974 | * | |
3975 | * May only be used if a codec with CODEC_CAP_DR1 has been opened. | |
3976 | */ | |
3977 | void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, | |
3978 | int linesize_align[AV_NUM_DATA_POINTERS]); | |
3979 | ||
3980 | /** | |
3981 | * Converts AVChromaLocation to swscale x/y chroma position. | |
3982 | * | |
3983 | * The positions represent the chroma (0,0) position in a coordinates system | |
3984 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 | |
3985 | * | |
3986 | * @param xpos horizontal chroma sample position | |
3987 | * @param ypos vertical chroma sample position | |
3988 | */ | |
3989 | int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos); | |
3990 | ||
3991 | /** | |
3992 | * Converts swscale x/y chroma position to AVChromaLocation. | |
3993 | * | |
3994 | * The positions represent the chroma (0,0) position in a coordinates system | |
3995 | * with luma (0,0) representing the origin and luma(1,1) representing 256,256 | |
3996 | * | |
3997 | * @param xpos horizontal chroma sample position | |
3998 | * @param ypos vertical chroma sample position | |
3999 | */ | |
4000 | enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos); | |
4001 | ||
4002 | #if FF_API_OLD_DECODE_AUDIO | |
4003 | /** | |
4004 | * Wrapper function which calls avcodec_decode_audio4. | |
4005 | * | |
4006 | * @deprecated Use avcodec_decode_audio4 instead. | |
4007 | * | |
4008 | * Decode the audio frame of size avpkt->size from avpkt->data into samples. | |
4009 | * Some decoders may support multiple frames in a single AVPacket, such | |
4010 | * decoders would then just decode the first frame. In this case, | |
4011 | * avcodec_decode_audio3 has to be called again with an AVPacket that contains | |
4012 | * the remaining data in order to decode the second frame etc. | |
4013 | * If no frame | |
4014 | * could be outputted, frame_size_ptr is zero. Otherwise, it is the | |
4015 | * decompressed frame size in bytes. | |
4016 | * | |
4017 | * @warning You must set frame_size_ptr to the allocated size of the | |
4018 | * output buffer before calling avcodec_decode_audio3(). | |
4019 | * | |
4020 | * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than | |
4021 | * the actual read bytes because some optimized bitstream readers read 32 or 64 | |
4022 | * bits at once and could read over the end. | |
4023 | * | |
4024 | * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that | |
4025 | * no overreading happens for damaged MPEG streams. | |
4026 | * | |
4027 | * @warning You must not provide a custom get_buffer() when using | |
4028 | * avcodec_decode_audio3(). Doing so will override it with | |
4029 | * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead, | |
4030 | * which does allow the application to provide a custom get_buffer(). | |
4031 | * | |
4032 | * @note You might have to align the input buffer avpkt->data and output buffer | |
4033 | * samples. The alignment requirements depend on the CPU: On some CPUs it isn't | |
4034 | * necessary at all, on others it won't work at all if not aligned and on others | |
4035 | * it will work but it will have an impact on performance. | |
4036 | * | |
4037 | * In practice, avpkt->data should have 4 byte alignment at minimum and | |
4038 | * samples should be 16 byte aligned unless the CPU doesn't need it | |
4039 | * (AltiVec and SSE do). | |
4040 | * | |
4041 | * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay | |
4042 | * between input and output, these need to be fed with avpkt->data=NULL, | |
4043 | * avpkt->size=0 at the end to return the remaining frames. | |
4044 | * | |
4045 | * @param avctx the codec context | |
4046 | * @param[out] samples the output buffer, sample type in avctx->sample_fmt | |
4047 | * If the sample format is planar, each channel plane will | |
4048 | * be the same size, with no padding between channels. | |
4049 | * @param[in,out] frame_size_ptr the output buffer size in bytes | |
4050 | * @param[in] avpkt The input AVPacket containing the input buffer. | |
4051 | * You can create such packet with av_init_packet() and by then setting | |
4052 | * data and size, some decoders might in addition need other fields. | |
4053 | * All decoders are designed to use the least fields possible though. | |
4054 | * @return On error a negative value is returned, otherwise the number of bytes | |
4055 | * used or zero if no frame data was decompressed (used) from the input AVPacket. | |
4056 | */ | |
4057 | attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, | |
4058 | int *frame_size_ptr, | |
4059 | AVPacket *avpkt); | |
4060 | #endif | |
4061 | ||
4062 | /** | |
4063 | * Decode the audio frame of size avpkt->size from avpkt->data into frame. | |
4064 | * | |
4065 | * Some decoders may support multiple frames in a single AVPacket. Such | |
4066 | * decoders would then just decode the first frame and the return value would be | |
4067 | * less than the packet size. In this case, avcodec_decode_audio4 has to be | |
4068 | * called again with an AVPacket containing the remaining data in order to | |
4069 | * decode the second frame, etc... Even if no frames are returned, the packet | |
4070 | * needs to be fed to the decoder with remaining data until it is completely | |
4071 | * consumed or an error occurs. | |
4072 | * | |
4073 | * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input | |
4074 | * and output. This means that for some packets they will not immediately | |
4075 | * produce decoded output and need to be flushed at the end of decoding to get | |
4076 | * all the decoded data. Flushing is done by calling this function with packets | |
4077 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops | |
4078 | * returning samples. It is safe to flush even those decoders that are not | |
4079 | * marked with CODEC_CAP_DELAY, then no samples will be returned. | |
4080 | * | |
4081 | * @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE | |
4082 | * larger than the actual read bytes because some optimized bitstream | |
4083 | * readers read 32 or 64 bits at once and could read over the end. | |
4084 | * | |
4085 | * @param avctx the codec context | |
4086 | * @param[out] frame The AVFrame in which to store decoded audio samples. | |
4087 | * The decoder will allocate a buffer for the decoded frame by | |
4088 | * calling the AVCodecContext.get_buffer2() callback. | |
4089 | * When AVCodecContext.refcounted_frames is set to 1, the frame is | |
4090 | * reference counted and the returned reference belongs to the | |
4091 | * caller. The caller must release the frame using av_frame_unref() | |
4092 | * when the frame is no longer needed. The caller may safely write | |
4093 | * to the frame if av_frame_is_writable() returns 1. | |
4094 | * When AVCodecContext.refcounted_frames is set to 0, the returned | |
4095 | * reference belongs to the decoder and is valid only until the | |
4096 | * next call to this function or until closing or flushing the | |
4097 | * decoder. The caller may not write to it. | |
4098 | * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is | |
4099 | * non-zero. Note that this field being set to zero | |
4100 | * does not mean that an error has occurred. For | |
4101 | * decoders with CODEC_CAP_DELAY set, no given decode | |
4102 | * call is guaranteed to produce a frame. | |
4103 | * @param[in] avpkt The input AVPacket containing the input buffer. | |
4104 | * At least avpkt->data and avpkt->size should be set. Some | |
4105 | * decoders might also require additional fields to be set. | |
4106 | * @return A negative error code is returned if an error occurred during | |
4107 | * decoding, otherwise the number of bytes consumed from the input | |
4108 | * AVPacket is returned. | |
4109 | */ | |
4110 | int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, | |
4111 | int *got_frame_ptr, const AVPacket *avpkt); | |
4112 | ||
4113 | /** | |
4114 | * Decode the video frame of size avpkt->size from avpkt->data into picture. | |
4115 | * Some decoders may support multiple frames in a single AVPacket, such | |
4116 | * decoders would then just decode the first frame. | |
4117 | * | |
4118 | * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than | |
4119 | * the actual read bytes because some optimized bitstream readers read 32 or 64 | |
4120 | * bits at once and could read over the end. | |
4121 | * | |
4122 | * @warning The end of the input buffer buf should be set to 0 to ensure that | |
4123 | * no overreading happens for damaged MPEG streams. | |
4124 | * | |
4125 | * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay | |
4126 | * between input and output, these need to be fed with avpkt->data=NULL, | |
4127 | * avpkt->size=0 at the end to return the remaining frames. | |
4128 | * | |
4129 | * @param avctx the codec context | |
4130 | * @param[out] picture The AVFrame in which the decoded video frame will be stored. | |
4131 | * Use av_frame_alloc() to get an AVFrame. The codec will | |
4132 | * allocate memory for the actual bitmap by calling the | |
4133 | * AVCodecContext.get_buffer2() callback. | |
4134 | * When AVCodecContext.refcounted_frames is set to 1, the frame is | |
4135 | * reference counted and the returned reference belongs to the | |
4136 | * caller. The caller must release the frame using av_frame_unref() | |
4137 | * when the frame is no longer needed. The caller may safely write | |
4138 | * to the frame if av_frame_is_writable() returns 1. | |
4139 | * When AVCodecContext.refcounted_frames is set to 0, the returned | |
4140 | * reference belongs to the decoder and is valid only until the | |
4141 | * next call to this function or until closing or flushing the | |
4142 | * decoder. The caller may not write to it. | |
4143 | * | |
4144 | * @param[in] avpkt The input AVPacket containing the input buffer. | |
4145 | * You can create such packet with av_init_packet() and by then setting | |
4146 | * data and size, some decoders might in addition need other fields like | |
4147 | * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least | |
4148 | * fields possible. | |
4149 | * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. | |
4150 | * @return On error a negative value is returned, otherwise the number of bytes | |
4151 | * used or zero if no frame could be decompressed. | |
4152 | */ | |
4153 | int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, | |
4154 | int *got_picture_ptr, | |
4155 | const AVPacket *avpkt); | |
4156 | ||
4157 | /** | |
4158 | * Decode a subtitle message. | |
4159 | * Return a negative value on error, otherwise return the number of bytes used. | |
4160 | * If no subtitle could be decompressed, got_sub_ptr is zero. | |
4161 | * Otherwise, the subtitle is stored in *sub. | |
4162 | * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for | |
4163 | * simplicity, because the performance difference is expect to be negligible | |
4164 | * and reusing a get_buffer written for video codecs would probably perform badly | |
4165 | * due to a potentially very different allocation pattern. | |
4166 | * | |
4167 | * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input | |
4168 | * and output. This means that for some packets they will not immediately | |
4169 | * produce decoded output and need to be flushed at the end of decoding to get | |
4170 | * all the decoded data. Flushing is done by calling this function with packets | |
4171 | * with avpkt->data set to NULL and avpkt->size set to 0 until it stops | |
4172 | * returning subtitles. It is safe to flush even those decoders that are not | |
4173 | * marked with CODEC_CAP_DELAY, then no subtitles will be returned. | |
4174 | * | |
4175 | * @param avctx the codec context | |
4176 | * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored, | |
4177 | * must be freed with avsubtitle_free if *got_sub_ptr is set. | |
4178 | * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero. | |
4179 | * @param[in] avpkt The input AVPacket containing the input buffer. | |
4180 | */ | |
4181 | int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, | |
4182 | int *got_sub_ptr, | |
4183 | AVPacket *avpkt); | |
4184 | ||
4185 | /** | |
4186 | * @defgroup lavc_parsing Frame parsing | |
4187 | * @{ | |
4188 | */ | |
4189 | ||
4190 | enum AVPictureStructure { | |
4191 | AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown | |
4192 | AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field | |
4193 | AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field | |
4194 | AV_PICTURE_STRUCTURE_FRAME, //< coded as frame | |
4195 | }; | |
4196 | ||
4197 | typedef struct AVCodecParserContext { | |
4198 | void *priv_data; | |
4199 | struct AVCodecParser *parser; | |
4200 | int64_t frame_offset; /* offset of the current frame */ | |
4201 | int64_t cur_offset; /* current offset | |
4202 | (incremented by each av_parser_parse()) */ | |
4203 | int64_t next_frame_offset; /* offset of the next frame */ | |
4204 | /* video info */ | |
4205 | int pict_type; /* XXX: Put it back in AVCodecContext. */ | |
4206 | /** | |
4207 | * This field is used for proper frame duration computation in lavf. | |
4208 | * It signals, how much longer the frame duration of the current frame | |
4209 | * is compared to normal frame duration. | |
4210 | * | |
4211 | * frame_duration = (1 + repeat_pict) * time_base | |
4212 | * | |
4213 | * It is used by codecs like H.264 to display telecined material. | |
4214 | */ | |
4215 | int repeat_pict; /* XXX: Put it back in AVCodecContext. */ | |
4216 | int64_t pts; /* pts of the current frame */ | |
4217 | int64_t dts; /* dts of the current frame */ | |
4218 | ||
4219 | /* private data */ | |
4220 | int64_t last_pts; | |
4221 | int64_t last_dts; | |
4222 | int fetch_timestamp; | |
4223 | ||
4224 | #define AV_PARSER_PTS_NB 4 | |
4225 | int cur_frame_start_index; | |
4226 | int64_t cur_frame_offset[AV_PARSER_PTS_NB]; | |
4227 | int64_t cur_frame_pts[AV_PARSER_PTS_NB]; | |
4228 | int64_t cur_frame_dts[AV_PARSER_PTS_NB]; | |
4229 | ||
4230 | int flags; | |
4231 | #define PARSER_FLAG_COMPLETE_FRAMES 0x0001 | |
4232 | #define PARSER_FLAG_ONCE 0x0002 | |
4233 | /// Set if the parser has a valid file offset | |
4234 | #define PARSER_FLAG_FETCHED_OFFSET 0x0004 | |
4235 | #define PARSER_FLAG_USE_CODEC_TS 0x1000 | |
4236 | ||
4237 | int64_t offset; ///< byte offset from starting packet start | |
4238 | int64_t cur_frame_end[AV_PARSER_PTS_NB]; | |
4239 | ||
4240 | /** | |
4241 | * Set by parser to 1 for key frames and 0 for non-key frames. | |
4242 | * It is initialized to -1, so if the parser doesn't set this flag, | |
4243 | * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames | |
4244 | * will be used. | |
4245 | */ | |
4246 | int key_frame; | |
4247 | ||
4248 | /** | |
4249 | * Time difference in stream time base units from the pts of this | |
4250 | * packet to the point at which the output from the decoder has converged | |
4251 | * independent from the availability of previous frames. That is, the | |
4252 | * frames are virtually identical no matter if decoding started from | |
4253 | * the very first frame or from this keyframe. | |
4254 | * Is AV_NOPTS_VALUE if unknown. | |
4255 | * This field is not the display duration of the current frame. | |
4256 | * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY | |
4257 | * set. | |
4258 | * | |
4259 | * The purpose of this field is to allow seeking in streams that have no | |
4260 | * keyframes in the conventional sense. It corresponds to the | |
4261 | * recovery point SEI in H.264 and match_time_delta in NUT. It is also | |
4262 | * essential for some types of subtitle streams to ensure that all | |
4263 | * subtitles are correctly displayed after seeking. | |
4264 | */ | |
4265 | int64_t convergence_duration; | |
4266 | ||
4267 | // Timestamp generation support: | |
4268 | /** | |
4269 | * Synchronization point for start of timestamp generation. | |
4270 | * | |
4271 | * Set to >0 for sync point, 0 for no sync point and <0 for undefined | |
4272 | * (default). | |
4273 | * | |
4274 | * For example, this corresponds to presence of H.264 buffering period | |
4275 | * SEI message. | |
4276 | */ | |
4277 | int dts_sync_point; | |
4278 | ||
4279 | /** | |
4280 | * Offset of the current timestamp against last timestamp sync point in | |
4281 | * units of AVCodecContext.time_base. | |
4282 | * | |
4283 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must | |
4284 | * contain a valid timestamp offset. | |
4285 | * | |
4286 | * Note that the timestamp of sync point has usually a nonzero | |
4287 | * dts_ref_dts_delta, which refers to the previous sync point. Offset of | |
4288 | * the next frame after timestamp sync point will be usually 1. | |
4289 | * | |
4290 | * For example, this corresponds to H.264 cpb_removal_delay. | |
4291 | */ | |
4292 | int dts_ref_dts_delta; | |
4293 | ||
4294 | /** | |
4295 | * Presentation delay of current frame in units of AVCodecContext.time_base. | |
4296 | * | |
4297 | * Set to INT_MIN when dts_sync_point unused. Otherwise, it must | |
4298 | * contain valid non-negative timestamp delta (presentation time of a frame | |
4299 | * must not lie in the past). | |
4300 | * | |
4301 | * This delay represents the difference between decoding and presentation | |
4302 | * time of the frame. | |
4303 | * | |
4304 | * For example, this corresponds to H.264 dpb_output_delay. | |
4305 | */ | |
4306 | int pts_dts_delta; | |
4307 | ||
4308 | /** | |
4309 | * Position of the packet in file. | |
4310 | * | |
4311 | * Analogous to cur_frame_pts/dts | |
4312 | */ | |
4313 | int64_t cur_frame_pos[AV_PARSER_PTS_NB]; | |
4314 | ||
4315 | /** | |
4316 | * Byte position of currently parsed frame in stream. | |
4317 | */ | |
4318 | int64_t pos; | |
4319 | ||
4320 | /** | |
4321 | * Previous frame byte position. | |
4322 | */ | |
4323 | int64_t last_pos; | |
4324 | ||
4325 | /** | |
4326 | * Duration of the current frame. | |
4327 | * For audio, this is in units of 1 / AVCodecContext.sample_rate. | |
4328 | * For all other types, this is in units of AVCodecContext.time_base. | |
4329 | */ | |
4330 | int duration; | |
4331 | ||
4332 | enum AVFieldOrder field_order; | |
4333 | ||
4334 | /** | |
4335 | * Indicate whether a picture is coded as a frame, top field or bottom field. | |
4336 | * | |
4337 | * For example, H.264 field_pic_flag equal to 0 corresponds to | |
4338 | * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag | |
4339 | * equal to 1 and bottom_field_flag equal to 0 corresponds to | |
4340 | * AV_PICTURE_STRUCTURE_TOP_FIELD. | |
4341 | */ | |
4342 | enum AVPictureStructure picture_structure; | |
4343 | ||
4344 | /** | |
4345 | * Picture number incremented in presentation or output order. | |
4346 | * This field may be reinitialized at the first picture of a new sequence. | |
4347 | * | |
4348 | * For example, this corresponds to H.264 PicOrderCnt. | |
4349 | */ | |
4350 | int output_picture_number; | |
4351 | } AVCodecParserContext; | |
4352 | ||
4353 | typedef struct AVCodecParser { | |
4354 | int codec_ids[5]; /* several codec IDs are permitted */ | |
4355 | int priv_data_size; | |
4356 | int (*parser_init)(AVCodecParserContext *s); | |
4357 | int (*parser_parse)(AVCodecParserContext *s, | |
4358 | AVCodecContext *avctx, | |
4359 | const uint8_t **poutbuf, int *poutbuf_size, | |
4360 | const uint8_t *buf, int buf_size); | |
4361 | void (*parser_close)(AVCodecParserContext *s); | |
4362 | int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size); | |
4363 | struct AVCodecParser *next; | |
4364 | } AVCodecParser; | |
4365 | ||
4366 | AVCodecParser *av_parser_next(const AVCodecParser *c); | |
4367 | ||
4368 | void av_register_codec_parser(AVCodecParser *parser); | |
4369 | AVCodecParserContext *av_parser_init(int codec_id); | |
4370 | ||
4371 | /** | |
4372 | * Parse a packet. | |
4373 | * | |
4374 | * @param s parser context. | |
4375 | * @param avctx codec context. | |
4376 | * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished. | |
4377 | * @param poutbuf_size set to size of parsed buffer or zero if not yet finished. | |
4378 | * @param buf input buffer. | |
4379 | * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output). | |
4380 | * @param pts input presentation timestamp. | |
4381 | * @param dts input decoding timestamp. | |
4382 | * @param pos input byte position in stream. | |
4383 | * @return the number of bytes of the input bitstream used. | |
4384 | * | |
4385 | * Example: | |
4386 | * @code | |
4387 | * while(in_len){ | |
4388 | * len = av_parser_parse2(myparser, AVCodecContext, &data, &size, | |
4389 | * in_data, in_len, | |
4390 | * pts, dts, pos); | |
4391 | * in_data += len; | |
4392 | * in_len -= len; | |
4393 | * | |
4394 | * if(size) | |
4395 | * decode_frame(data, size); | |
4396 | * } | |
4397 | * @endcode | |
4398 | */ | |
4399 | int av_parser_parse2(AVCodecParserContext *s, | |
4400 | AVCodecContext *avctx, | |
4401 | uint8_t **poutbuf, int *poutbuf_size, | |
4402 | const uint8_t *buf, int buf_size, | |
4403 | int64_t pts, int64_t dts, | |
4404 | int64_t pos); | |
4405 | ||
4406 | /** | |
4407 | * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed | |
4408 | * @deprecated use AVBitStreamFilter | |
4409 | */ | |
4410 | int av_parser_change(AVCodecParserContext *s, | |
4411 | AVCodecContext *avctx, | |
4412 | uint8_t **poutbuf, int *poutbuf_size, | |
4413 | const uint8_t *buf, int buf_size, int keyframe); | |
4414 | void av_parser_close(AVCodecParserContext *s); | |
4415 | ||
4416 | /** | |
4417 | * @} | |
4418 | * @} | |
4419 | */ | |
4420 | ||
4421 | /** | |
4422 | * @addtogroup lavc_encoding | |
4423 | * @{ | |
4424 | */ | |
4425 | ||
4426 | /** | |
4427 | * Find a registered encoder with a matching codec ID. | |
4428 | * | |
4429 | * @param id AVCodecID of the requested encoder | |
4430 | * @return An encoder if one was found, NULL otherwise. | |
4431 | */ | |
4432 | AVCodec *avcodec_find_encoder(enum AVCodecID id); | |
4433 | ||
4434 | /** | |
4435 | * Find a registered encoder with the specified name. | |
4436 | * | |
4437 | * @param name name of the requested encoder | |
4438 | * @return An encoder if one was found, NULL otherwise. | |
4439 | */ | |
4440 | AVCodec *avcodec_find_encoder_by_name(const char *name); | |
4441 | ||
4442 | #if FF_API_OLD_ENCODE_AUDIO | |
4443 | /** | |
4444 | * Encode an audio frame from samples into buf. | |
4445 | * | |
4446 | * @deprecated Use avcodec_encode_audio2 instead. | |
4447 | * | |
4448 | * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large. | |
4449 | * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user | |
4450 | * will know how much space is needed because it depends on the value passed | |
4451 | * in buf_size as described below. In that case a lower value can be used. | |
4452 | * | |
4453 | * @param avctx the codec context | |
4454 | * @param[out] buf the output buffer | |
4455 | * @param[in] buf_size the output buffer size | |
4456 | * @param[in] samples the input buffer containing the samples | |
4457 | * The number of samples read from this buffer is frame_size*channels, | |
4458 | * both of which are defined in avctx. | |
4459 | * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of | |
4460 | * samples read from samples is equal to: | |
4461 | * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id)) | |
4462 | * This also implies that av_get_bits_per_sample() must not return 0 for these | |
4463 | * codecs. | |
4464 | * @return On error a negative value is returned, on success zero or the number | |
4465 | * of bytes used to encode the data read from the input buffer. | |
4466 | */ | |
4467 | int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx, | |
4468 | uint8_t *buf, int buf_size, | |
4469 | const short *samples); | |
4470 | #endif | |
4471 | ||
4472 | /** | |
4473 | * Encode a frame of audio. | |
4474 | * | |
4475 | * Takes input samples from frame and writes the next output packet, if | |
4476 | * available, to avpkt. The output packet does not necessarily contain data for | |
4477 | * the most recent frame, as encoders can delay, split, and combine input frames | |
4478 | * internally as needed. | |
4479 | * | |
4480 | * @param avctx codec context | |
4481 | * @param avpkt output AVPacket. | |
4482 | * The user can supply an output buffer by setting | |
4483 | * avpkt->data and avpkt->size prior to calling the | |
4484 | * function, but if the size of the user-provided data is not | |
4485 | * large enough, encoding will fail. If avpkt->data and | |
4486 | * avpkt->size are set, avpkt->destruct must also be set. All | |
4487 | * other AVPacket fields will be reset by the encoder using | |
4488 | * av_init_packet(). If avpkt->data is NULL, the encoder will | |
4489 | * allocate it. The encoder will set avpkt->size to the size | |
4490 | * of the output packet. | |
4491 | * | |
4492 | * If this function fails or produces no output, avpkt will be | |
4493 | * freed using av_free_packet() (i.e. avpkt->destruct will be | |
4494 | * called to free the user supplied buffer). | |
4495 | * @param[in] frame AVFrame containing the raw audio data to be encoded. | |
4496 | * May be NULL when flushing an encoder that has the | |
4497 | * CODEC_CAP_DELAY capability set. | |
4498 | * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame | |
4499 | * can have any number of samples. | |
4500 | * If it is not set, frame->nb_samples must be equal to | |
4501 | * avctx->frame_size for all frames except the last. | |
4502 | * The final frame may be smaller than avctx->frame_size. | |
4503 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the | |
4504 | * output packet is non-empty, and to 0 if it is | |
4505 | * empty. If the function returns an error, the | |
4506 | * packet can be assumed to be invalid, and the | |
4507 | * value of got_packet_ptr is undefined and should | |
4508 | * not be used. | |
4509 | * @return 0 on success, negative error code on failure | |
4510 | */ | |
4511 | int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, | |
4512 | const AVFrame *frame, int *got_packet_ptr); | |
4513 | ||
4514 | #if FF_API_OLD_ENCODE_VIDEO | |
4515 | /** | |
4516 | * @deprecated use avcodec_encode_video2() instead. | |
4517 | * | |
4518 | * Encode a video frame from pict into buf. | |
4519 | * The input picture should be | |
4520 | * stored using a specific format, namely avctx.pix_fmt. | |
4521 | * | |
4522 | * @param avctx the codec context | |
4523 | * @param[out] buf the output buffer for the bitstream of encoded frame | |
4524 | * @param[in] buf_size the size of the output buffer in bytes | |
4525 | * @param[in] pict the input picture to encode | |
4526 | * @return On error a negative value is returned, on success zero or the number | |
4527 | * of bytes used from the output buffer. | |
4528 | */ | |
4529 | attribute_deprecated | |
4530 | int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, | |
4531 | const AVFrame *pict); | |
4532 | #endif | |
4533 | ||
4534 | /** | |
4535 | * Encode a frame of video. | |
4536 | * | |
4537 | * Takes input raw video data from frame and writes the next output packet, if | |
4538 | * available, to avpkt. The output packet does not necessarily contain data for | |
4539 | * the most recent frame, as encoders can delay and reorder input frames | |
4540 | * internally as needed. | |
4541 | * | |
4542 | * @param avctx codec context | |
4543 | * @param avpkt output AVPacket. | |
4544 | * The user can supply an output buffer by setting | |
4545 | * avpkt->data and avpkt->size prior to calling the | |
4546 | * function, but if the size of the user-provided data is not | |
4547 | * large enough, encoding will fail. All other AVPacket fields | |
4548 | * will be reset by the encoder using av_init_packet(). If | |
4549 | * avpkt->data is NULL, the encoder will allocate it. | |
4550 | * The encoder will set avpkt->size to the size of the | |
4551 | * output packet. The returned data (if any) belongs to the | |
4552 | * caller, he is responsible for freeing it. | |
4553 | * | |
4554 | * If this function fails or produces no output, avpkt will be | |
4555 | * freed using av_free_packet() (i.e. avpkt->destruct will be | |
4556 | * called to free the user supplied buffer). | |
4557 | * @param[in] frame AVFrame containing the raw video data to be encoded. | |
4558 | * May be NULL when flushing an encoder that has the | |
4559 | * CODEC_CAP_DELAY capability set. | |
4560 | * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the | |
4561 | * output packet is non-empty, and to 0 if it is | |
4562 | * empty. If the function returns an error, the | |
4563 | * packet can be assumed to be invalid, and the | |
4564 | * value of got_packet_ptr is undefined and should | |
4565 | * not be used. | |
4566 | * @return 0 on success, negative error code on failure | |
4567 | */ | |
4568 | int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, | |
4569 | const AVFrame *frame, int *got_packet_ptr); | |
4570 | ||
4571 | int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, | |
4572 | const AVSubtitle *sub); | |
4573 | ||
4574 | ||
4575 | /** | |
4576 | * @} | |
4577 | */ | |
4578 | ||
4579 | #if FF_API_AVCODEC_RESAMPLE | |
4580 | /** | |
4581 | * @defgroup lavc_resample Audio resampling | |
4582 | * @ingroup libavc | |
4583 | * @deprecated use libswresample instead | |
4584 | * | |
4585 | * @{ | |
4586 | */ | |
4587 | struct ReSampleContext; | |
4588 | struct AVResampleContext; | |
4589 | ||
4590 | typedef struct ReSampleContext ReSampleContext; | |
4591 | ||
4592 | /** | |
4593 | * Initialize audio resampling context. | |
4594 | * | |
4595 | * @param output_channels number of output channels | |
4596 | * @param input_channels number of input channels | |
4597 | * @param output_rate output sample rate | |
4598 | * @param input_rate input sample rate | |
4599 | * @param sample_fmt_out requested output sample format | |
4600 | * @param sample_fmt_in input sample format | |
4601 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency | |
4602 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank | |
4603 | * @param linear if 1 then the used FIR filter will be linearly interpolated | |
4604 | between the 2 closest, if 0 the closest will be used | |
4605 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate | |
4606 | * @return allocated ReSampleContext, NULL if error occurred | |
4607 | */ | |
4608 | attribute_deprecated | |
4609 | ReSampleContext *av_audio_resample_init(int output_channels, int input_channels, | |
4610 | int output_rate, int input_rate, | |
4611 | enum AVSampleFormat sample_fmt_out, | |
4612 | enum AVSampleFormat sample_fmt_in, | |
4613 | int filter_length, int log2_phase_count, | |
4614 | int linear, double cutoff); | |
4615 | ||
4616 | attribute_deprecated | |
4617 | int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); | |
4618 | ||
4619 | /** | |
4620 | * Free resample context. | |
4621 | * | |
4622 | * @param s a non-NULL pointer to a resample context previously | |
4623 | * created with av_audio_resample_init() | |
4624 | */ | |
4625 | attribute_deprecated | |
4626 | void audio_resample_close(ReSampleContext *s); | |
4627 | ||
4628 | ||
4629 | /** | |
4630 | * Initialize an audio resampler. | |
4631 | * Note, if either rate is not an integer then simply scale both rates up so they are. | |
4632 | * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq | |
4633 | * @param log2_phase_count log2 of the number of entries in the polyphase filterbank | |
4634 | * @param linear If 1 then the used FIR filter will be linearly interpolated | |
4635 | between the 2 closest, if 0 the closest will be used | |
4636 | * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate | |
4637 | */ | |
4638 | attribute_deprecated | |
4639 | struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); | |
4640 | ||
4641 | /** | |
4642 | * Resample an array of samples using a previously configured context. | |
4643 | * @param src an array of unconsumed samples | |
4644 | * @param consumed the number of samples of src which have been consumed are returned here | |
4645 | * @param src_size the number of unconsumed samples available | |
4646 | * @param dst_size the amount of space in samples available in dst | |
4647 | * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context. | |
4648 | * @return the number of samples written in dst or -1 if an error occurred | |
4649 | */ | |
4650 | attribute_deprecated | |
4651 | int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); | |
4652 | ||
4653 | ||
4654 | /** | |
4655 | * Compensate samplerate/timestamp drift. The compensation is done by changing | |
4656 | * the resampler parameters, so no audible clicks or similar distortions occur | |
4657 | * @param compensation_distance distance in output samples over which the compensation should be performed | |
4658 | * @param sample_delta number of output samples which should be output less | |
4659 | * | |
4660 | * example: av_resample_compensate(c, 10, 500) | |
4661 | * here instead of 510 samples only 500 samples would be output | |
4662 | * | |
4663 | * note, due to rounding the actual compensation might be slightly different, | |
4664 | * especially if the compensation_distance is large and the in_rate used during init is small | |
4665 | */ | |
4666 | attribute_deprecated | |
4667 | void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); | |
4668 | attribute_deprecated | |
4669 | void av_resample_close(struct AVResampleContext *c); | |
4670 | ||
4671 | /** | |
4672 | * @} | |
4673 | */ | |
4674 | #endif | |
4675 | ||
4676 | /** | |
4677 | * @addtogroup lavc_picture | |
4678 | * @{ | |
4679 | */ | |
4680 | ||
4681 | /** | |
4682 | * Allocate memory for the pixels of a picture and setup the AVPicture | |
4683 | * fields for it. | |
4684 | * | |
4685 | * Call avpicture_free() to free it. | |
4686 | * | |
4687 | * @param picture the picture structure to be filled in | |
4688 | * @param pix_fmt the pixel format of the picture | |
4689 | * @param width the width of the picture | |
4690 | * @param height the height of the picture | |
4691 | * @return zero if successful, a negative error code otherwise | |
4692 | * | |
4693 | * @see av_image_alloc(), avpicture_fill() | |
4694 | */ | |
4695 | int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); | |
4696 | ||
4697 | /** | |
4698 | * Free a picture previously allocated by avpicture_alloc(). | |
4699 | * The data buffer used by the AVPicture is freed, but the AVPicture structure | |
4700 | * itself is not. | |
4701 | * | |
4702 | * @param picture the AVPicture to be freed | |
4703 | */ | |
4704 | void avpicture_free(AVPicture *picture); | |
4705 | ||
4706 | /** | |
4707 | * Setup the picture fields based on the specified image parameters | |
4708 | * and the provided image data buffer. | |
4709 | * | |
4710 | * The picture fields are filled in by using the image data buffer | |
4711 | * pointed to by ptr. | |
4712 | * | |
4713 | * If ptr is NULL, the function will fill only the picture linesize | |
4714 | * array and return the required size for the image buffer. | |
4715 | * | |
4716 | * To allocate an image buffer and fill the picture data in one call, | |
4717 | * use avpicture_alloc(). | |
4718 | * | |
4719 | * @param picture the picture to be filled in | |
4720 | * @param ptr buffer where the image data is stored, or NULL | |
4721 | * @param pix_fmt the pixel format of the image | |
4722 | * @param width the width of the image in pixels | |
4723 | * @param height the height of the image in pixels | |
4724 | * @return the size in bytes required for src, a negative error code | |
4725 | * in case of failure | |
4726 | * | |
4727 | * @see av_image_fill_arrays() | |
4728 | */ | |
4729 | int avpicture_fill(AVPicture *picture, const uint8_t *ptr, | |
4730 | enum AVPixelFormat pix_fmt, int width, int height); | |
4731 | ||
4732 | /** | |
4733 | * Copy pixel data from an AVPicture into a buffer. | |
4734 | * | |
4735 | * avpicture_get_size() can be used to compute the required size for | |
4736 | * the buffer to fill. | |
4737 | * | |
4738 | * @param src source picture with filled data | |
4739 | * @param pix_fmt picture pixel format | |
4740 | * @param width picture width | |
4741 | * @param height picture height | |
4742 | * @param dest destination buffer | |
4743 | * @param dest_size destination buffer size in bytes | |
4744 | * @return the number of bytes written to dest, or a negative value | |
4745 | * (error code) on error, for example if the destination buffer is not | |
4746 | * big enough | |
4747 | * | |
4748 | * @see av_image_copy_to_buffer() | |
4749 | */ | |
4750 | int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, | |
4751 | int width, int height, | |
4752 | unsigned char *dest, int dest_size); | |
4753 | ||
4754 | /** | |
4755 | * Calculate the size in bytes that a picture of the given width and height | |
4756 | * would occupy if stored in the given picture format. | |
4757 | * | |
4758 | * @param pix_fmt picture pixel format | |
4759 | * @param width picture width | |
4760 | * @param height picture height | |
4761 | * @return the computed picture buffer size or a negative error code | |
4762 | * in case of error | |
4763 | * | |
4764 | * @see av_image_get_buffer_size(). | |
4765 | */ | |
4766 | int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height); | |
4767 | ||
4768 | #if FF_API_DEINTERLACE | |
4769 | /** | |
4770 | * deinterlace - if not supported return -1 | |
4771 | * | |
4772 | * @deprecated - use yadif (in libavfilter) instead | |
4773 | */ | |
4774 | attribute_deprecated | |
4775 | int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, | |
4776 | enum AVPixelFormat pix_fmt, int width, int height); | |
4777 | #endif | |
4778 | /** | |
4779 | * Copy image src to dst. Wraps av_image_copy(). | |
4780 | */ | |
4781 | void av_picture_copy(AVPicture *dst, const AVPicture *src, | |
4782 | enum AVPixelFormat pix_fmt, int width, int height); | |
4783 | ||
4784 | /** | |
4785 | * Crop image top and left side. | |
4786 | */ | |
4787 | int av_picture_crop(AVPicture *dst, const AVPicture *src, | |
4788 | enum AVPixelFormat pix_fmt, int top_band, int left_band); | |
4789 | ||
4790 | /** | |
4791 | * Pad image. | |
4792 | */ | |
4793 | int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, | |
4794 | int padtop, int padbottom, int padleft, int padright, int *color); | |
4795 | ||
4796 | /** | |
4797 | * @} | |
4798 | */ | |
4799 | ||
4800 | /** | |
4801 | * @defgroup lavc_misc Utility functions | |
4802 | * @ingroup libavc | |
4803 | * | |
4804 | * Miscellaneous utility functions related to both encoding and decoding | |
4805 | * (or neither). | |
4806 | * @{ | |
4807 | */ | |
4808 | ||
4809 | /** | |
4810 | * @defgroup lavc_misc_pixfmt Pixel formats | |
4811 | * | |
4812 | * Functions for working with pixel formats. | |
4813 | * @{ | |
4814 | */ | |
4815 | ||
4816 | /** | |
4817 | * Utility function to access log2_chroma_w log2_chroma_h from | |
4818 | * the pixel format AVPixFmtDescriptor. | |
4819 | * | |
4820 | * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample | |
4821 | * for one that returns a failure code and continues in case of invalid | |
4822 | * pix_fmts. | |
4823 | * | |
4824 | * @param[in] pix_fmt the pixel format | |
4825 | * @param[out] h_shift store log2_chroma_w | |
4826 | * @param[out] v_shift store log2_chroma_h | |
4827 | * | |
4828 | * @see av_pix_fmt_get_chroma_sub_sample | |
4829 | */ | |
4830 | ||
4831 | void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); | |
4832 | ||
4833 | /** | |
4834 | * Return a value representing the fourCC code associated to the | |
4835 | * pixel format pix_fmt, or 0 if no associated fourCC code can be | |
4836 | * found. | |
4837 | */ | |
4838 | unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt); | |
4839 | ||
4840 | /** | |
4841 | * @deprecated see av_get_pix_fmt_loss() | |
4842 | */ | |
4843 | int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, | |
4844 | int has_alpha); | |
4845 | ||
4846 | /** | |
4847 | * Find the best pixel format to convert to given a certain source pixel | |
4848 | * format. When converting from one pixel format to another, information loss | |
4849 | * may occur. For example, when converting from RGB24 to GRAY, the color | |
4850 | * information will be lost. Similarly, other losses occur when converting from | |
4851 | * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of | |
4852 | * the given pixel formats should be used to suffer the least amount of loss. | |
4853 | * The pixel formats from which it chooses one, are determined by the | |
4854 | * pix_fmt_list parameter. | |
4855 | * | |
4856 | * | |
4857 | * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from | |
4858 | * @param[in] src_pix_fmt source pixel format | |
4859 | * @param[in] has_alpha Whether the source pixel format alpha channel is used. | |
4860 | * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. | |
4861 | * @return The best pixel format to convert to or -1 if none was found. | |
4862 | */ | |
4863 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, | |
4864 | enum AVPixelFormat src_pix_fmt, | |
4865 | int has_alpha, int *loss_ptr); | |
4866 | ||
4867 | /** | |
4868 | * @deprecated see av_find_best_pix_fmt_of_2() | |
4869 | */ | |
4870 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, | |
4871 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); | |
4872 | ||
4873 | attribute_deprecated | |
4874 | #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI | |
4875 | enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list, | |
4876 | enum AVPixelFormat src_pix_fmt, | |
4877 | int has_alpha, int *loss_ptr); | |
4878 | #else | |
4879 | enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, | |
4880 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr); | |
4881 | #endif | |
4882 | ||
4883 | ||
4884 | enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt); | |
4885 | ||
4886 | /** | |
4887 | * @} | |
4888 | */ | |
4889 | ||
4890 | #if FF_API_SET_DIMENSIONS | |
4891 | /** | |
4892 | * @deprecated this function is not supposed to be used from outside of lavc | |
4893 | */ | |
4894 | attribute_deprecated | |
4895 | void avcodec_set_dimensions(AVCodecContext *s, int width, int height); | |
4896 | #endif | |
4897 | ||
4898 | /** | |
4899 | * Put a string representing the codec tag codec_tag in buf. | |
4900 | * | |
4901 | * @param buf buffer to place codec tag in | |
4902 | * @param buf_size size in bytes of buf | |
4903 | * @param codec_tag codec tag to assign | |
4904 | * @return the length of the string that would have been generated if | |
4905 | * enough space had been available, excluding the trailing null | |
4906 | */ | |
4907 | size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); | |
4908 | ||
4909 | void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); | |
4910 | ||
4911 | /** | |
4912 | * Return a name for the specified profile, if available. | |
4913 | * | |
4914 | * @param codec the codec that is searched for the given profile | |
4915 | * @param profile the profile value for which a name is requested | |
4916 | * @return A name for the profile if found, NULL otherwise. | |
4917 | */ | |
4918 | const char *av_get_profile_name(const AVCodec *codec, int profile); | |
4919 | ||
4920 | int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); | |
4921 | int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count); | |
4922 | //FIXME func typedef | |
4923 | ||
4924 | /** | |
4925 | * Fill AVFrame audio data and linesize pointers. | |
4926 | * | |
4927 | * The buffer buf must be a preallocated buffer with a size big enough | |
4928 | * to contain the specified samples amount. The filled AVFrame data | |
4929 | * pointers will point to this buffer. | |
4930 | * | |
4931 | * AVFrame extended_data channel pointers are allocated if necessary for | |
4932 | * planar audio. | |
4933 | * | |
4934 | * @param frame the AVFrame | |
4935 | * frame->nb_samples must be set prior to calling the | |
4936 | * function. This function fills in frame->data, | |
4937 | * frame->extended_data, frame->linesize[0]. | |
4938 | * @param nb_channels channel count | |
4939 | * @param sample_fmt sample format | |
4940 | * @param buf buffer to use for frame data | |
4941 | * @param buf_size size of buffer | |
4942 | * @param align plane size sample alignment (0 = default) | |
4943 | * @return >=0 on success, negative error code on failure | |
4944 | * @todo return the size in bytes required to store the samples in | |
4945 | * case of success, at the next libavutil bump | |
4946 | */ | |
4947 | int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, | |
4948 | enum AVSampleFormat sample_fmt, const uint8_t *buf, | |
4949 | int buf_size, int align); | |
4950 | ||
4951 | /** | |
4952 | * Reset the internal decoder state / flush internal buffers. Should be called | |
4953 | * e.g. when seeking or when switching to a different stream. | |
4954 | * | |
4955 | * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), | |
4956 | * this invalidates the frames previously returned from the decoder. When | |
4957 | * refcounted frames are used, the decoder just releases any references it might | |
4958 | * keep internally, but the caller's reference remains valid. | |
4959 | */ | |
4960 | void avcodec_flush_buffers(AVCodecContext *avctx); | |
4961 | ||
4962 | /** | |
4963 | * Return codec bits per sample. | |
4964 | * | |
4965 | * @param[in] codec_id the codec | |
4966 | * @return Number of bits per sample or zero if unknown for the given codec. | |
4967 | */ | |
4968 | int av_get_bits_per_sample(enum AVCodecID codec_id); | |
4969 | ||
4970 | /** | |
4971 | * Return the PCM codec associated with a sample format. | |
4972 | * @param be endianness, 0 for little, 1 for big, | |
4973 | * -1 (or anything else) for native | |
4974 | * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE | |
4975 | */ | |
4976 | enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be); | |
4977 | ||
4978 | /** | |
4979 | * Return codec bits per sample. | |
4980 | * Only return non-zero if the bits per sample is exactly correct, not an | |
4981 | * approximation. | |
4982 | * | |
4983 | * @param[in] codec_id the codec | |
4984 | * @return Number of bits per sample or zero if unknown for the given codec. | |
4985 | */ | |
4986 | int av_get_exact_bits_per_sample(enum AVCodecID codec_id); | |
4987 | ||
4988 | /** | |
4989 | * Return audio frame duration. | |
4990 | * | |
4991 | * @param avctx codec context | |
4992 | * @param frame_bytes size of the frame, or 0 if unknown | |
4993 | * @return frame duration, in samples, if known. 0 if not able to | |
4994 | * determine. | |
4995 | */ | |
4996 | int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes); | |
4997 | ||
4998 | ||
4999 | typedef struct AVBitStreamFilterContext { | |
5000 | void *priv_data; | |
5001 | struct AVBitStreamFilter *filter; | |
5002 | AVCodecParserContext *parser; | |
5003 | struct AVBitStreamFilterContext *next; | |
5004 | } AVBitStreamFilterContext; | |
5005 | ||
5006 | ||
5007 | typedef struct AVBitStreamFilter { | |
5008 | const char *name; | |
5009 | int priv_data_size; | |
5010 | int (*filter)(AVBitStreamFilterContext *bsfc, | |
5011 | AVCodecContext *avctx, const char *args, | |
5012 | uint8_t **poutbuf, int *poutbuf_size, | |
5013 | const uint8_t *buf, int buf_size, int keyframe); | |
5014 | void (*close)(AVBitStreamFilterContext *bsfc); | |
5015 | struct AVBitStreamFilter *next; | |
5016 | } AVBitStreamFilter; | |
5017 | ||
5018 | /** | |
5019 | * Register a bitstream filter. | |
5020 | * | |
5021 | * The filter will be accessible to the application code through | |
5022 | * av_bitstream_filter_next() or can be directly initialized with | |
5023 | * av_bitstream_filter_init(). | |
5024 | * | |
5025 | * @see avcodec_register_all() | |
5026 | */ | |
5027 | void av_register_bitstream_filter(AVBitStreamFilter *bsf); | |
5028 | ||
5029 | /** | |
5030 | * Create and initialize a bitstream filter context given a bitstream | |
5031 | * filter name. | |
5032 | * | |
5033 | * The returned context must be freed with av_bitstream_filter_close(). | |
5034 | * | |
5035 | * @param name the name of the bitstream filter | |
5036 | * @return a bitstream filter context if a matching filter was found | |
5037 | * and successfully initialized, NULL otherwise | |
5038 | */ | |
5039 | AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); | |
5040 | ||
5041 | /** | |
5042 | * Filter bitstream. | |
5043 | * | |
5044 | * This function filters the buffer buf with size buf_size, and places the | |
5045 | * filtered buffer in the buffer pointed to by poutbuf. | |
5046 | * | |
5047 | * The output buffer must be freed by the caller. | |
5048 | * | |
5049 | * @param bsfc bitstream filter context created by av_bitstream_filter_init() | |
5050 | * @param avctx AVCodecContext accessed by the filter, may be NULL. | |
5051 | * If specified, this must point to the encoder context of the | |
5052 | * output stream the packet is sent to. | |
5053 | * @param args arguments which specify the filter configuration, may be NULL | |
5054 | * @param poutbuf pointer which is updated to point to the filtered buffer | |
5055 | * @param poutbuf_size pointer which is updated to the filtered buffer size in bytes | |
5056 | * @param buf buffer containing the data to filter | |
5057 | * @param buf_size size in bytes of buf | |
5058 | * @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data | |
5059 | * @return >= 0 in case of success, or a negative error code in case of failure | |
5060 | * | |
5061 | * If the return value is positive, an output buffer is allocated and | |
5062 | * is available in *poutbuf, and is distinct from the input buffer. | |
5063 | * | |
5064 | * If the return value is 0, the output buffer is not allocated and | |
5065 | * should be considered identical to the input buffer, or in case | |
5066 | * *poutbuf was set it points to the input buffer (not necessarily to | |
5067 | * its starting address). | |
5068 | */ | |
5069 | int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, | |
5070 | AVCodecContext *avctx, const char *args, | |
5071 | uint8_t **poutbuf, int *poutbuf_size, | |
5072 | const uint8_t *buf, int buf_size, int keyframe); | |
5073 | ||
5074 | /** | |
5075 | * Release bitstream filter context. | |
5076 | * | |
5077 | * @param bsf the bitstream filter context created with | |
5078 | * av_bitstream_filter_init(), can be NULL | |
5079 | */ | |
5080 | void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); | |
5081 | ||
5082 | /** | |
5083 | * If f is NULL, return the first registered bitstream filter, | |
5084 | * if f is non-NULL, return the next registered bitstream filter | |
5085 | * after f, or NULL if f is the last one. | |
5086 | * | |
5087 | * This function can be used to iterate over all registered bitstream | |
5088 | * filters. | |
5089 | */ | |
5090 | AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f); | |
5091 | ||
5092 | /* memory */ | |
5093 | ||
5094 | /** | |
5095 | * Same behaviour av_fast_malloc but the buffer has additional | |
5096 | * FF_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0. | |
5097 | * | |
5098 | * In addition the whole buffer will initially and after resizes | |
5099 | * be 0-initialized so that no uninitialized data will ever appear. | |
5100 | */ | |
5101 | void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size); | |
5102 | ||
5103 | /** | |
5104 | * Same behaviour av_fast_padded_malloc except that buffer will always | |
5105 | * be 0-initialized after call. | |
5106 | */ | |
5107 | void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size); | |
5108 | ||
5109 | /** | |
5110 | * Encode extradata length to a buffer. Used by xiph codecs. | |
5111 | * | |
5112 | * @param s buffer to write to; must be at least (v/255+1) bytes long | |
5113 | * @param v size of extradata in bytes | |
5114 | * @return number of bytes written to the buffer. | |
5115 | */ | |
5116 | unsigned int av_xiphlacing(unsigned char *s, unsigned int v); | |
5117 | ||
5118 | #if FF_API_MISSING_SAMPLE | |
5119 | /** | |
5120 | * Log a generic warning message about a missing feature. This function is | |
5121 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) | |
5122 | * only, and would normally not be used by applications. | |
5123 | * @param[in] avc a pointer to an arbitrary struct of which the first field is | |
5124 | * a pointer to an AVClass struct | |
5125 | * @param[in] feature string containing the name of the missing feature | |
5126 | * @param[in] want_sample indicates if samples are wanted which exhibit this feature. | |
5127 | * If want_sample is non-zero, additional verbage will be added to the log | |
5128 | * message which tells the user how to report samples to the development | |
5129 | * mailing list. | |
5130 | * @deprecated Use avpriv_report_missing_feature() instead. | |
5131 | */ | |
5132 | attribute_deprecated | |
5133 | void av_log_missing_feature(void *avc, const char *feature, int want_sample); | |
5134 | ||
5135 | /** | |
5136 | * Log a generic warning message asking for a sample. This function is | |
5137 | * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) | |
5138 | * only, and would normally not be used by applications. | |
5139 | * @param[in] avc a pointer to an arbitrary struct of which the first field is | |
5140 | * a pointer to an AVClass struct | |
5141 | * @param[in] msg string containing an optional message, or NULL if no message | |
5142 | * @deprecated Use avpriv_request_sample() instead. | |
5143 | */ | |
5144 | attribute_deprecated | |
5145 | void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); | |
5146 | #endif /* FF_API_MISSING_SAMPLE */ | |
5147 | ||
5148 | /** | |
5149 | * Register the hardware accelerator hwaccel. | |
5150 | */ | |
5151 | void av_register_hwaccel(AVHWAccel *hwaccel); | |
5152 | ||
5153 | /** | |
5154 | * If hwaccel is NULL, returns the first registered hardware accelerator, | |
5155 | * if hwaccel is non-NULL, returns the next registered hardware accelerator | |
5156 | * after hwaccel, or NULL if hwaccel is the last one. | |
5157 | */ | |
5158 | AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel); | |
5159 | ||
5160 | ||
5161 | /** | |
5162 | * Lock operation used by lockmgr | |
5163 | */ | |
5164 | enum AVLockOp { | |
5165 | AV_LOCK_CREATE, ///< Create a mutex | |
5166 | AV_LOCK_OBTAIN, ///< Lock the mutex | |
5167 | AV_LOCK_RELEASE, ///< Unlock the mutex | |
5168 | AV_LOCK_DESTROY, ///< Free mutex resources | |
5169 | }; | |
5170 | ||
5171 | /** | |
5172 | * Register a user provided lock manager supporting the operations | |
f6fa7814 DM |
5173 | * specified by AVLockOp. The "mutex" argument to the function points |
5174 | * to a (void *) where the lockmgr should store/get a pointer to a user | |
5175 | * allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the | |
5176 | * value left by the last call for all other ops. If the lock manager is | |
5177 | * unable to perform the op then it should leave the mutex in the same | |
5178 | * state as when it was called and return a non-zero value. However, | |
5179 | * when called with AV_LOCK_DESTROY the mutex will always be assumed to | |
5180 | * have been successfully destroyed. If av_lockmgr_register succeeds | |
5181 | * it will return a non-negative value, if it fails it will return a | |
5182 | * negative value and destroy all mutex and unregister all callbacks. | |
5183 | * av_lockmgr_register is not thread-safe, it must be called from a | |
5184 | * single thread before any calls which make use of locking are used. | |
5185 | * | |
5186 | * @param cb User defined callback. av_lockmgr_register invokes calls | |
5187 | * to this callback and the previously registered callback. | |
5188 | * The callback will be used to create more than one mutex | |
5189 | * each of which must be backed by its own underlying locking | |
5190 | * mechanism (i.e. do not use a single static object to | |
5191 | * implement your lock manager). If cb is set to NULL the | |
5192 | * lockmgr will be unregistered. | |
2ba45a60 DM |
5193 | */ |
5194 | int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); | |
5195 | ||
5196 | /** | |
5197 | * Get the type of the given codec. | |
5198 | */ | |
5199 | enum AVMediaType avcodec_get_type(enum AVCodecID codec_id); | |
5200 | ||
5201 | /** | |
5202 | * Get the name of a codec. | |
5203 | * @return a static string identifying the codec; never NULL | |
5204 | */ | |
5205 | const char *avcodec_get_name(enum AVCodecID id); | |
5206 | ||
5207 | /** | |
5208 | * @return a positive value if s is open (i.e. avcodec_open2() was called on it | |
5209 | * with no corresponding avcodec_close()), 0 otherwise. | |
5210 | */ | |
5211 | int avcodec_is_open(AVCodecContext *s); | |
5212 | ||
5213 | /** | |
5214 | * @return a non-zero number if codec is an encoder, zero otherwise | |
5215 | */ | |
5216 | int av_codec_is_encoder(const AVCodec *codec); | |
5217 | ||
5218 | /** | |
5219 | * @return a non-zero number if codec is a decoder, zero otherwise | |
5220 | */ | |
5221 | int av_codec_is_decoder(const AVCodec *codec); | |
5222 | ||
5223 | /** | |
5224 | * @return descriptor for given codec ID or NULL if no descriptor exists. | |
5225 | */ | |
5226 | const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); | |
5227 | ||
5228 | /** | |
5229 | * Iterate over all codec descriptors known to libavcodec. | |
5230 | * | |
5231 | * @param prev previous descriptor. NULL to get the first descriptor. | |
5232 | * | |
5233 | * @return next descriptor or NULL after the last descriptor | |
5234 | */ | |
5235 | const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev); | |
5236 | ||
5237 | /** | |
5238 | * @return codec descriptor with the given name or NULL if no such descriptor | |
5239 | * exists. | |
5240 | */ | |
5241 | const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); | |
5242 | ||
5243 | /** | |
5244 | * @} | |
5245 | */ | |
5246 | ||
5247 | #endif /* AVCODEC_AVCODEC_H */ |