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2ba45a60 DM |
1 | /* |
2 | * MSMPEG4 backend for encoder and decoder | |
3 | * Copyright (c) 2001 Fabrice Bellard | |
4 | * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at> | |
7 | * | |
8 | * This file is part of FFmpeg. | |
9 | * | |
10 | * FFmpeg is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU Lesser General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2.1 of the License, or (at your option) any later version. | |
14 | * | |
15 | * FFmpeg is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public | |
21 | * License along with FFmpeg; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | */ | |
24 | ||
25 | #include "avcodec.h" | |
26 | #include "mpegutils.h" | |
27 | #include "mpegvideo.h" | |
28 | #include "msmpeg4.h" | |
29 | #include "libavutil/imgutils.h" | |
30 | #include "libavutil/x86/asm.h" | |
31 | #include "h263.h" | |
32 | #include "mpeg4video.h" | |
33 | #include "msmpeg4data.h" | |
34 | #include "vc1data.h" | |
35 | ||
36 | #define DC_VLC_BITS 9 | |
37 | #define V2_INTRA_CBPC_VLC_BITS 3 | |
38 | #define V2_MB_TYPE_VLC_BITS 7 | |
39 | #define MV_VLC_BITS 9 | |
40 | #define V2_MV_VLC_BITS 9 | |
41 | #define TEX_VLC_BITS 9 | |
42 | ||
43 | #define DEFAULT_INTER_INDEX 3 | |
44 | ||
45 | static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, | |
46 | int32_t **dc_val_ptr) | |
47 | { | |
48 | int i; | |
49 | ||
50 | if (n < 4) { | |
51 | i= 0; | |
52 | } else { | |
53 | i= n-3; | |
54 | } | |
55 | ||
56 | *dc_val_ptr= &s->last_dc[i]; | |
57 | return s->last_dc[i]; | |
58 | } | |
59 | ||
60 | /****************************************/ | |
61 | /* decoding stuff */ | |
62 | ||
63 | VLC ff_mb_non_intra_vlc[4]; | |
64 | static VLC v2_dc_lum_vlc; | |
65 | static VLC v2_dc_chroma_vlc; | |
66 | static VLC v2_intra_cbpc_vlc; | |
67 | static VLC v2_mb_type_vlc; | |
68 | static VLC v2_mv_vlc; | |
69 | VLC ff_inter_intra_vlc; | |
70 | ||
71 | /* This is identical to h263 except that its range is multiplied by 2. */ | |
72 | static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) | |
73 | { | |
74 | int code, val, sign, shift; | |
75 | ||
76 | code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2); | |
77 | av_dlog(s, "MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred); | |
78 | if (code < 0) | |
79 | return 0xffff; | |
80 | ||
81 | if (code == 0) | |
82 | return pred; | |
83 | sign = get_bits1(&s->gb); | |
84 | shift = f_code - 1; | |
85 | val = code; | |
86 | if (shift) { | |
87 | val = (val - 1) << shift; | |
88 | val |= get_bits(&s->gb, shift); | |
89 | val++; | |
90 | } | |
91 | if (sign) | |
92 | val = -val; | |
93 | ||
94 | val += pred; | |
95 | if (val <= -64) | |
96 | val += 64; | |
97 | else if (val >= 64) | |
98 | val -= 64; | |
99 | ||
100 | return val; | |
101 | } | |
102 | ||
103 | static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) | |
104 | { | |
105 | int cbp, code, i; | |
106 | uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; | |
107 | ||
108 | if (s->pict_type == AV_PICTURE_TYPE_P) { | |
109 | if (s->use_skip_mb_code) { | |
110 | if (get_bits1(&s->gb)) { | |
111 | /* skip mb */ | |
112 | s->mb_intra = 0; | |
113 | for(i=0;i<6;i++) | |
114 | s->block_last_index[i] = -1; | |
115 | s->mv_dir = MV_DIR_FORWARD; | |
116 | s->mv_type = MV_TYPE_16X16; | |
117 | s->mv[0][0][0] = 0; | |
118 | s->mv[0][0][1] = 0; | |
119 | s->mb_skipped = 1; | |
120 | *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; | |
121 | return 0; | |
122 | } | |
123 | } | |
124 | ||
125 | if(s->msmpeg4_version==2) | |
126 | code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1); | |
127 | else | |
128 | code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); | |
129 | if(code<0 || code>7){ | |
130 | av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y); | |
131 | return -1; | |
132 | } | |
133 | ||
134 | s->mb_intra = code >>2; | |
135 | ||
136 | cbp = code & 0x3; | |
137 | } else { | |
138 | s->mb_intra = 1; | |
139 | if(s->msmpeg4_version==2) | |
140 | cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1); | |
141 | else | |
142 | cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1); | |
143 | if(cbp<0 || cbp>3){ | |
144 | av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); | |
145 | return -1; | |
146 | } | |
147 | } | |
148 | ||
149 | if (!s->mb_intra) { | |
150 | int mx, my, cbpy; | |
151 | ||
152 | cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); | |
153 | if(cbpy<0){ | |
154 | av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); | |
155 | return -1; | |
156 | } | |
157 | ||
158 | cbp|= cbpy<<2; | |
159 | if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; | |
160 | ||
161 | ff_h263_pred_motion(s, 0, 0, &mx, &my); | |
162 | mx= msmpeg4v2_decode_motion(s, mx, 1); | |
163 | my= msmpeg4v2_decode_motion(s, my, 1); | |
164 | ||
165 | s->mv_dir = MV_DIR_FORWARD; | |
166 | s->mv_type = MV_TYPE_16X16; | |
167 | s->mv[0][0][0] = mx; | |
168 | s->mv[0][0][1] = my; | |
169 | *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; | |
170 | } else { | |
171 | if(s->msmpeg4_version==2){ | |
172 | s->ac_pred = get_bits1(&s->gb); | |
173 | cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors | |
174 | } else{ | |
175 | s->ac_pred = 0; | |
176 | cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors | |
177 | if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; | |
178 | } | |
179 | *mb_type_ptr = MB_TYPE_INTRA; | |
180 | } | |
181 | ||
182 | s->bdsp.clear_blocks(s->block[0]); | |
183 | for (i = 0; i < 6; i++) { | |
184 | if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) | |
185 | { | |
186 | av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); | |
187 | return -1; | |
188 | } | |
189 | } | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64]) | |
194 | { | |
195 | int cbp, code, i; | |
196 | uint8_t *coded_val; | |
197 | uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; | |
198 | ||
199 | if (s->pict_type == AV_PICTURE_TYPE_P) { | |
200 | if (s->use_skip_mb_code) { | |
201 | if (get_bits1(&s->gb)) { | |
202 | /* skip mb */ | |
203 | s->mb_intra = 0; | |
204 | for(i=0;i<6;i++) | |
205 | s->block_last_index[i] = -1; | |
206 | s->mv_dir = MV_DIR_FORWARD; | |
207 | s->mv_type = MV_TYPE_16X16; | |
208 | s->mv[0][0][0] = 0; | |
209 | s->mv[0][0][1] = 0; | |
210 | s->mb_skipped = 1; | |
211 | *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | } | |
216 | ||
217 | code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3); | |
218 | if (code < 0) | |
219 | return -1; | |
220 | //s->mb_intra = (code & 0x40) ? 0 : 1; | |
221 | s->mb_intra = (~code & 0x40) >> 6; | |
222 | ||
223 | cbp = code & 0x3f; | |
224 | } else { | |
225 | s->mb_intra = 1; | |
226 | code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); | |
227 | if (code < 0) | |
228 | return -1; | |
229 | /* predict coded block pattern */ | |
230 | cbp = 0; | |
231 | for(i=0;i<6;i++) { | |
232 | int val = ((code >> (5 - i)) & 1); | |
233 | if (i < 4) { | |
234 | int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); | |
235 | val = val ^ pred; | |
236 | *coded_val = val; | |
237 | } | |
238 | cbp |= val << (5 - i); | |
239 | } | |
240 | } | |
241 | ||
242 | if (!s->mb_intra) { | |
243 | int mx, my; | |
244 | if(s->per_mb_rl_table && cbp){ | |
245 | s->rl_table_index = decode012(&s->gb); | |
246 | s->rl_chroma_table_index = s->rl_table_index; | |
247 | } | |
248 | ff_h263_pred_motion(s, 0, 0, &mx, &my); | |
249 | if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0) | |
250 | return -1; | |
251 | s->mv_dir = MV_DIR_FORWARD; | |
252 | s->mv_type = MV_TYPE_16X16; | |
253 | s->mv[0][0][0] = mx; | |
254 | s->mv[0][0][1] = my; | |
255 | *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; | |
256 | } else { | |
257 | av_dlog(s, "I at %d %d %d %06X\n", s->mb_x, s->mb_y, | |
258 | ((cbp & 3) ? 1 : 0) +((cbp & 0x3C)? 2 : 0), | |
259 | show_bits(&s->gb, 24)); | |
260 | s->ac_pred = get_bits1(&s->gb); | |
261 | *mb_type_ptr = MB_TYPE_INTRA; | |
262 | if(s->inter_intra_pred){ | |
263 | s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); | |
264 | av_dlog(s, "%d%d %d %d/", | |
265 | s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); | |
266 | } | |
267 | if(s->per_mb_rl_table && cbp){ | |
268 | s->rl_table_index = decode012(&s->gb); | |
269 | s->rl_chroma_table_index = s->rl_table_index; | |
270 | } | |
271 | } | |
272 | ||
273 | s->bdsp.clear_blocks(s->block[0]); | |
274 | for (i = 0; i < 6; i++) { | |
275 | if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) | |
276 | { | |
277 | av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); | |
278 | return -1; | |
279 | } | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | /* init all vlc decoding tables */ | |
286 | av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) | |
287 | { | |
288 | MpegEncContext *s = avctx->priv_data; | |
289 | static volatile int done = 0; | |
290 | int i, ret; | |
291 | MVTable *mv; | |
292 | ||
293 | if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) | |
294 | return ret; | |
295 | ||
296 | if (ff_h263_decode_init(avctx) < 0) | |
297 | return -1; | |
298 | ||
299 | ff_msmpeg4_common_init(s); | |
300 | ||
301 | if (!done) { | |
302 | for(i=0;i<NB_RL_TABLES;i++) { | |
303 | ff_init_rl(&ff_rl_table[i], ff_static_rl_table_store[i]); | |
304 | } | |
305 | INIT_VLC_RL(ff_rl_table[0], 642); | |
306 | INIT_VLC_RL(ff_rl_table[1], 1104); | |
307 | INIT_VLC_RL(ff_rl_table[2], 554); | |
308 | INIT_VLC_RL(ff_rl_table[3], 940); | |
309 | INIT_VLC_RL(ff_rl_table[4], 962); | |
310 | INIT_VLC_RL(ff_rl_table[5], 554); | |
311 | ||
312 | mv = &ff_mv_tables[0]; | |
313 | INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, | |
314 | mv->table_mv_bits, 1, 1, | |
315 | mv->table_mv_code, 2, 2, 3714); | |
316 | mv = &ff_mv_tables[1]; | |
317 | INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, | |
318 | mv->table_mv_bits, 1, 1, | |
319 | mv->table_mv_code, 2, 2, 2694); | |
320 | ||
321 | INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120, | |
322 | &ff_table0_dc_lum[0][1], 8, 4, | |
323 | &ff_table0_dc_lum[0][0], 8, 4, 1158); | |
324 | INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120, | |
325 | &ff_table0_dc_chroma[0][1], 8, 4, | |
326 | &ff_table0_dc_chroma[0][0], 8, 4, 1118); | |
327 | INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120, | |
328 | &ff_table1_dc_lum[0][1], 8, 4, | |
329 | &ff_table1_dc_lum[0][0], 8, 4, 1476); | |
330 | INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120, | |
331 | &ff_table1_dc_chroma[0][1], 8, 4, | |
332 | &ff_table1_dc_chroma[0][0], 8, 4, 1216); | |
333 | ||
334 | INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512, | |
335 | &ff_v2_dc_lum_table[0][1], 8, 4, | |
336 | &ff_v2_dc_lum_table[0][0], 8, 4, 1472); | |
337 | INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512, | |
338 | &ff_v2_dc_chroma_table[0][1], 8, 4, | |
339 | &ff_v2_dc_chroma_table[0][0], 8, 4, 1506); | |
340 | ||
341 | INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4, | |
342 | &ff_v2_intra_cbpc[0][1], 2, 1, | |
343 | &ff_v2_intra_cbpc[0][0], 2, 1, 8); | |
344 | INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8, | |
345 | &ff_v2_mb_type[0][1], 2, 1, | |
346 | &ff_v2_mb_type[0][0], 2, 1, 128); | |
347 | INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33, | |
348 | &ff_mvtab[0][1], 2, 1, | |
349 | &ff_mvtab[0][0], 2, 1, 538); | |
350 | ||
351 | INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128, | |
352 | &ff_wmv2_inter_table[0][0][1], 8, 4, | |
353 | &ff_wmv2_inter_table[0][0][0], 8, 4, 1636); | |
354 | INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128, | |
355 | &ff_wmv2_inter_table[1][0][1], 8, 4, | |
356 | &ff_wmv2_inter_table[1][0][0], 8, 4, 2648); | |
357 | INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128, | |
358 | &ff_wmv2_inter_table[2][0][1], 8, 4, | |
359 | &ff_wmv2_inter_table[2][0][0], 8, 4, 1532); | |
360 | INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128, | |
361 | &ff_wmv2_inter_table[3][0][1], 8, 4, | |
362 | &ff_wmv2_inter_table[3][0][0], 8, 4, 2488); | |
363 | ||
364 | INIT_VLC_STATIC(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64, | |
365 | &ff_msmp4_mb_i_table[0][1], 4, 2, | |
366 | &ff_msmp4_mb_i_table[0][0], 4, 2, 536); | |
367 | ||
368 | INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4, | |
369 | &ff_table_inter_intra[0][1], 2, 1, | |
370 | &ff_table_inter_intra[0][0], 2, 1, 8); | |
371 | done = 1; | |
372 | } | |
373 | ||
374 | switch(s->msmpeg4_version){ | |
375 | case 1: | |
376 | case 2: | |
377 | s->decode_mb= msmpeg4v12_decode_mb; | |
378 | break; | |
379 | case 3: | |
380 | case 4: | |
381 | s->decode_mb= msmpeg4v34_decode_mb; | |
382 | break; | |
383 | case 5: | |
384 | if (CONFIG_WMV2_DECODER) | |
385 | s->decode_mb= ff_wmv2_decode_mb; | |
386 | case 6: | |
387 | //FIXME + TODO VC1 decode mb | |
388 | break; | |
389 | } | |
390 | ||
391 | s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | int ff_msmpeg4_decode_picture_header(MpegEncContext * s) | |
397 | { | |
398 | int code; | |
399 | ||
400 | if(s->msmpeg4_version==1){ | |
401 | int start_code = get_bits_long(&s->gb, 32); | |
402 | if(start_code!=0x00000100){ | |
403 | av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n"); | |
404 | return -1; | |
405 | } | |
406 | ||
407 | skip_bits(&s->gb, 5); // frame number */ | |
408 | } | |
409 | ||
410 | s->pict_type = get_bits(&s->gb, 2) + 1; | |
411 | if (s->pict_type != AV_PICTURE_TYPE_I && | |
412 | s->pict_type != AV_PICTURE_TYPE_P){ | |
413 | av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n"); | |
414 | return -1; | |
415 | } | |
416 | #if 0 | |
417 | { | |
418 | static int had_i=0; | |
419 | if(s->pict_type == AV_PICTURE_TYPE_I) had_i=1; | |
420 | if(!had_i) return -1; | |
421 | } | |
422 | #endif | |
423 | s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); | |
424 | if(s->qscale==0){ | |
425 | av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n"); | |
426 | return -1; | |
427 | } | |
428 | ||
429 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
430 | code = get_bits(&s->gb, 5); | |
431 | if(s->msmpeg4_version==1){ | |
432 | if(code==0 || code>s->mb_height){ | |
433 | av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code); | |
434 | return -1; | |
435 | } | |
436 | ||
437 | s->slice_height = code; | |
438 | }else{ | |
439 | /* 0x17: one slice, 0x18: two slices, ... */ | |
440 | if (code < 0x17){ | |
441 | av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code); | |
442 | return -1; | |
443 | } | |
444 | ||
445 | s->slice_height = s->mb_height / (code - 0x16); | |
446 | } | |
447 | ||
448 | switch(s->msmpeg4_version){ | |
449 | case 1: | |
450 | case 2: | |
451 | s->rl_chroma_table_index = 2; | |
452 | s->rl_table_index = 2; | |
453 | ||
454 | s->dc_table_index = 0; //not used | |
455 | break; | |
456 | case 3: | |
457 | s->rl_chroma_table_index = decode012(&s->gb); | |
458 | s->rl_table_index = decode012(&s->gb); | |
459 | ||
460 | s->dc_table_index = get_bits1(&s->gb); | |
461 | break; | |
462 | case 4: | |
463 | ff_msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); | |
464 | ||
465 | if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); | |
466 | else s->per_mb_rl_table= 0; | |
467 | ||
468 | if(!s->per_mb_rl_table){ | |
469 | s->rl_chroma_table_index = decode012(&s->gb); | |
470 | s->rl_table_index = decode012(&s->gb); | |
471 | } | |
472 | ||
473 | s->dc_table_index = get_bits1(&s->gb); | |
474 | s->inter_intra_pred= 0; | |
475 | break; | |
476 | } | |
477 | s->no_rounding = 1; | |
478 | if(s->avctx->debug&FF_DEBUG_PICT_INFO) | |
479 | av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n", | |
480 | s->qscale, | |
481 | s->rl_chroma_table_index, | |
482 | s->rl_table_index, | |
483 | s->dc_table_index, | |
484 | s->per_mb_rl_table, | |
485 | s->slice_height); | |
486 | } else { | |
487 | switch(s->msmpeg4_version){ | |
488 | case 1: | |
489 | case 2: | |
490 | if(s->msmpeg4_version==1) | |
491 | s->use_skip_mb_code = 1; | |
492 | else | |
493 | s->use_skip_mb_code = get_bits1(&s->gb); | |
494 | s->rl_table_index = 2; | |
495 | s->rl_chroma_table_index = s->rl_table_index; | |
496 | s->dc_table_index = 0; //not used | |
497 | s->mv_table_index = 0; | |
498 | break; | |
499 | case 3: | |
500 | s->use_skip_mb_code = get_bits1(&s->gb); | |
501 | s->rl_table_index = decode012(&s->gb); | |
502 | s->rl_chroma_table_index = s->rl_table_index; | |
503 | ||
504 | s->dc_table_index = get_bits1(&s->gb); | |
505 | ||
506 | s->mv_table_index = get_bits1(&s->gb); | |
507 | break; | |
508 | case 4: | |
509 | s->use_skip_mb_code = get_bits1(&s->gb); | |
510 | ||
511 | if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); | |
512 | else s->per_mb_rl_table= 0; | |
513 | ||
514 | if(!s->per_mb_rl_table){ | |
515 | s->rl_table_index = decode012(&s->gb); | |
516 | s->rl_chroma_table_index = s->rl_table_index; | |
517 | } | |
518 | ||
519 | s->dc_table_index = get_bits1(&s->gb); | |
520 | ||
521 | s->mv_table_index = get_bits1(&s->gb); | |
522 | s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); | |
523 | break; | |
524 | } | |
525 | ||
526 | if(s->avctx->debug&FF_DEBUG_PICT_INFO) | |
527 | av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n", | |
528 | s->use_skip_mb_code, | |
529 | s->rl_table_index, | |
530 | s->rl_chroma_table_index, | |
531 | s->dc_table_index, | |
532 | s->mv_table_index, | |
533 | s->per_mb_rl_table, | |
534 | s->qscale); | |
535 | ||
536 | if(s->flipflop_rounding){ | |
537 | s->no_rounding ^= 1; | |
538 | }else{ | |
539 | s->no_rounding = 0; | |
540 | } | |
541 | } | |
542 | av_dlog(s->avctx, "%d %d %d %d %d\n", s->pict_type, s->bit_rate, | |
543 | s->inter_intra_pred, s->width, s->height); | |
544 | ||
545 | s->esc3_level_length= 0; | |
546 | s->esc3_run_length= 0; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) | |
552 | { | |
553 | int left= buf_size*8 - get_bits_count(&s->gb); | |
554 | int length= s->msmpeg4_version>=3 ? 17 : 16; | |
555 | /* the alt_bitstream reader could read over the end so we need to check it */ | |
556 | if(left>=length && left<length+8) | |
557 | { | |
558 | skip_bits(&s->gb, 5); /* fps */ | |
559 | s->bit_rate= get_bits(&s->gb, 11)*1024; | |
560 | if(s->msmpeg4_version>=3) | |
561 | s->flipflop_rounding= get_bits1(&s->gb); | |
562 | else | |
563 | s->flipflop_rounding= 0; | |
564 | } | |
565 | else if(left<length+8) | |
566 | { | |
567 | s->flipflop_rounding= 0; | |
568 | if(s->msmpeg4_version != 2) | |
569 | av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left); | |
570 | } | |
571 | else | |
572 | { | |
573 | av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n"); | |
574 | } | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) | |
580 | { | |
581 | int level, pred; | |
582 | ||
583 | if(s->msmpeg4_version<=2){ | |
584 | if (n < 4) { | |
585 | level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3); | |
586 | } else { | |
587 | level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3); | |
588 | } | |
589 | if (level < 0) { | |
590 | av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); | |
591 | *dir_ptr = 0; | |
592 | return -1; | |
593 | } | |
594 | level-=256; | |
595 | }else{ //FIXME optimize use unified tables & index | |
596 | if (n < 4) { | |
597 | level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); | |
598 | } else { | |
599 | level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); | |
600 | } | |
601 | if (level < 0){ | |
602 | av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); | |
603 | *dir_ptr = 0; | |
604 | return -1; | |
605 | } | |
606 | ||
607 | if (level == DC_MAX) { | |
608 | level = get_bits(&s->gb, 8); | |
609 | if (get_bits1(&s->gb)) | |
610 | level = -level; | |
611 | } else if (level != 0) { | |
612 | if (get_bits1(&s->gb)) | |
613 | level = -level; | |
614 | } | |
615 | } | |
616 | ||
617 | if(s->msmpeg4_version==1){ | |
618 | int32_t *dc_val; | |
619 | pred = msmpeg4v1_pred_dc(s, n, &dc_val); | |
620 | level += pred; | |
621 | ||
622 | /* update predictor */ | |
623 | *dc_val= level; | |
624 | }else{ | |
625 | int16_t *dc_val; | |
626 | pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); | |
627 | level += pred; | |
628 | ||
629 | /* update predictor */ | |
630 | if (n < 4) { | |
631 | *dc_val = level * s->y_dc_scale; | |
632 | } else { | |
633 | *dc_val = level * s->c_dc_scale; | |
634 | } | |
635 | } | |
636 | ||
637 | return level; | |
638 | } | |
639 | ||
640 | //#define ERROR_DETAILS | |
641 | int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block, | |
642 | int n, int coded, const uint8_t *scan_table) | |
643 | { | |
644 | int level, i, last, run, run_diff; | |
645 | int av_uninit(dc_pred_dir); | |
646 | RLTable *rl; | |
647 | RL_VLC_ELEM *rl_vlc; | |
648 | int qmul, qadd; | |
649 | ||
650 | if (s->mb_intra) { | |
651 | qmul=1; | |
652 | qadd=0; | |
653 | ||
654 | /* DC coef */ | |
655 | level = msmpeg4_decode_dc(s, n, &dc_pred_dir); | |
656 | ||
657 | if (level < 0){ | |
658 | av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale); | |
659 | if(s->inter_intra_pred) level=0; | |
660 | } | |
661 | if (n < 4) { | |
662 | rl = &ff_rl_table[s->rl_table_index]; | |
663 | if(level > 256*s->y_dc_scale){ | |
664 | av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale); | |
665 | if(!s->inter_intra_pred) return -1; | |
666 | } | |
667 | } else { | |
668 | rl = &ff_rl_table[3 + s->rl_chroma_table_index]; | |
669 | if(level > 256*s->c_dc_scale){ | |
670 | av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale); | |
671 | if(!s->inter_intra_pred) return -1; | |
672 | } | |
673 | } | |
674 | block[0] = level; | |
675 | ||
676 | run_diff = s->msmpeg4_version >= 4; | |
677 | i = 0; | |
678 | if (!coded) { | |
679 | goto not_coded; | |
680 | } | |
681 | if (s->ac_pred) { | |
682 | if (dc_pred_dir == 0) | |
683 | scan_table = s->intra_v_scantable.permutated; /* left */ | |
684 | else | |
685 | scan_table = s->intra_h_scantable.permutated; /* top */ | |
686 | } else { | |
687 | scan_table = s->intra_scantable.permutated; | |
688 | } | |
689 | rl_vlc= rl->rl_vlc[0]; | |
690 | } else { | |
691 | qmul = s->qscale << 1; | |
692 | qadd = (s->qscale - 1) | 1; | |
693 | i = -1; | |
694 | rl = &ff_rl_table[3 + s->rl_table_index]; | |
695 | ||
696 | if(s->msmpeg4_version==2) | |
697 | run_diff = 0; | |
698 | else | |
699 | run_diff = 1; | |
700 | ||
701 | if (!coded) { | |
702 | s->block_last_index[n] = i; | |
703 | return 0; | |
704 | } | |
705 | if(!scan_table) | |
706 | scan_table = s->inter_scantable.permutated; | |
707 | rl_vlc= rl->rl_vlc[s->qscale]; | |
708 | } | |
709 | { | |
710 | OPEN_READER(re, &s->gb); | |
711 | for(;;) { | |
712 | UPDATE_CACHE(re, &s->gb); | |
713 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); | |
714 | if (level==0) { | |
715 | int cache; | |
716 | cache= GET_CACHE(re, &s->gb); | |
717 | /* escape */ | |
718 | if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { | |
719 | if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { | |
720 | /* third escape */ | |
721 | if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); | |
722 | UPDATE_CACHE(re, &s->gb); | |
723 | if(s->msmpeg4_version<=3){ | |
724 | last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); | |
725 | run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); | |
726 | level= SHOW_SBITS(re, &s->gb, 8); | |
727 | SKIP_COUNTER(re, &s->gb, 1+6+8); | |
728 | }else{ | |
729 | int sign; | |
730 | last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); | |
731 | if(!s->esc3_level_length){ | |
732 | int ll; | |
733 | av_dlog(s->avctx, "ESC-3 %X at %d %d\n", | |
734 | show_bits(&s->gb, 24), s->mb_x, s->mb_y); | |
735 | if(s->qscale<8){ | |
736 | ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); | |
737 | if(ll==0){ | |
738 | ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); | |
739 | } | |
740 | }else{ | |
741 | ll=2; | |
742 | while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ | |
743 | ll++; | |
744 | SKIP_BITS(re, &s->gb, 1); | |
745 | } | |
746 | if(ll<8) SKIP_BITS(re, &s->gb, 1); | |
747 | } | |
748 | ||
749 | s->esc3_level_length= ll; | |
750 | s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); | |
751 | UPDATE_CACHE(re, &s->gb); | |
752 | } | |
753 | run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); | |
754 | SKIP_BITS(re, &s->gb, s->esc3_run_length); | |
755 | ||
756 | sign= SHOW_UBITS(re, &s->gb, 1); | |
757 | SKIP_BITS(re, &s->gb, 1); | |
758 | ||
759 | level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); | |
760 | SKIP_BITS(re, &s->gb, s->esc3_level_length); | |
761 | if(sign) level= -level; | |
762 | } | |
763 | ||
764 | #if 0 // waste of time / this will detect very few errors | |
765 | { | |
766 | const int abs_level= FFABS(level); | |
767 | const int run1= run - rl->max_run[last][abs_level] - run_diff; | |
768 | if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ | |
769 | if(abs_level <= rl->max_level[last][run]){ | |
770 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); | |
771 | return DECODING_AC_LOST; | |
772 | } | |
773 | if(abs_level <= rl->max_level[last][run]*2){ | |
774 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); | |
775 | return DECODING_AC_LOST; | |
776 | } | |
777 | if(run1>=0 && abs_level <= rl->max_level[last][run1]){ | |
778 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); | |
779 | return DECODING_AC_LOST; | |
780 | } | |
781 | } | |
782 | } | |
783 | #endif | |
784 | //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ; | |
785 | if (level>0) level= level * qmul + qadd; | |
786 | else level= level * qmul - qadd; | |
787 | #if 0 // waste of time too :( | |
788 | if(level>2048 || level<-2048){ | |
789 | av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n"); | |
790 | return DECODING_AC_LOST; | |
791 | } | |
792 | #endif | |
793 | i+= run + 1; | |
794 | if(last) i+=192; | |
795 | #ifdef ERROR_DETAILS | |
796 | if(run==66) | |
797 | av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level); | |
798 | else if((i>62 && i<192) || i>192+63) | |
799 | av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level); | |
800 | #endif | |
801 | } else { | |
802 | /* second escape */ | |
803 | SKIP_BITS(re, &s->gb, 2); | |
804 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); | |
805 | i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing | |
806 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
807 | LAST_SKIP_BITS(re, &s->gb, 1); | |
808 | #ifdef ERROR_DETAILS | |
809 | if(run==66) | |
810 | av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level); | |
811 | else if((i>62 && i<192) || i>192+63) | |
812 | av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level); | |
813 | #endif | |
814 | } | |
815 | } else { | |
816 | /* first escape */ | |
817 | SKIP_BITS(re, &s->gb, 1); | |
818 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); | |
819 | i+= run; | |
820 | level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing | |
821 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
822 | LAST_SKIP_BITS(re, &s->gb, 1); | |
823 | #ifdef ERROR_DETAILS | |
824 | if(run==66) | |
825 | av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level); | |
826 | else if((i>62 && i<192) || i>192+63) | |
827 | av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level); | |
828 | #endif | |
829 | } | |
830 | } else { | |
831 | i+= run; | |
832 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
833 | LAST_SKIP_BITS(re, &s->gb, 1); | |
834 | #ifdef ERROR_DETAILS | |
835 | if(run==66) | |
836 | av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level); | |
837 | else if((i>62 && i<192) || i>192+63) | |
838 | av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level); | |
839 | #endif | |
840 | } | |
841 | if (i > 62){ | |
842 | i-= 192; | |
843 | if(i&(~63)){ | |
844 | const int left= get_bits_left(&s->gb); | |
845 | if(((i+192 == 64 && level/qmul==-1) || !(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT))) && left>=0){ | |
846 | av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y); | |
847 | i = 63; | |
848 | break; | |
849 | }else{ | |
850 | av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); | |
851 | return -1; | |
852 | } | |
853 | } | |
854 | ||
855 | block[scan_table[i]] = level; | |
856 | break; | |
857 | } | |
858 | ||
859 | block[scan_table[i]] = level; | |
860 | } | |
861 | CLOSE_READER(re, &s->gb); | |
862 | } | |
863 | not_coded: | |
864 | if (s->mb_intra) { | |
865 | ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); | |
866 | if (s->ac_pred) { | |
867 | i = 63; /* XXX: not optimal */ | |
868 | } | |
869 | } | |
870 | if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize | |
871 | s->block_last_index[n] = i; | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | int ff_msmpeg4_decode_motion(MpegEncContext * s, | |
877 | int *mx_ptr, int *my_ptr) | |
878 | { | |
879 | MVTable *mv; | |
880 | int code, mx, my; | |
881 | ||
882 | mv = &ff_mv_tables[s->mv_table_index]; | |
883 | ||
884 | code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2); | |
885 | if (code < 0){ | |
886 | av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y); | |
887 | return -1; | |
888 | } | |
889 | if (code == mv->n) { | |
890 | mx = get_bits(&s->gb, 6); | |
891 | my = get_bits(&s->gb, 6); | |
892 | } else { | |
893 | mx = mv->table_mvx[code]; | |
894 | my = mv->table_mvy[code]; | |
895 | } | |
896 | ||
897 | mx += *mx_ptr - 32; | |
898 | my += *my_ptr - 32; | |
899 | /* WARNING : they do not do exactly modulo encoding */ | |
900 | if (mx <= -64) | |
901 | mx += 64; | |
902 | else if (mx >= 64) | |
903 | mx -= 64; | |
904 | ||
905 | if (my <= -64) | |
906 | my += 64; | |
907 | else if (my >= 64) | |
908 | my -= 64; | |
909 | *mx_ptr = mx; | |
910 | *my_ptr = my; | |
911 | return 0; | |
912 | } | |
913 | ||
914 | AVCodec ff_msmpeg4v1_decoder = { | |
915 | .name = "msmpeg4v1", | |
916 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"), | |
917 | .type = AVMEDIA_TYPE_VIDEO, | |
918 | .id = AV_CODEC_ID_MSMPEG4V1, | |
919 | .priv_data_size = sizeof(MpegEncContext), | |
920 | .init = ff_msmpeg4_decode_init, | |
921 | .close = ff_h263_decode_end, | |
922 | .decode = ff_h263_decode_frame, | |
923 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, | |
924 | .max_lowres = 3, | |
925 | .pix_fmts = (const enum AVPixelFormat[]) { | |
926 | AV_PIX_FMT_YUV420P, | |
927 | AV_PIX_FMT_NONE | |
928 | }, | |
929 | }; | |
930 | ||
931 | AVCodec ff_msmpeg4v2_decoder = { | |
932 | .name = "msmpeg4v2", | |
933 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"), | |
934 | .type = AVMEDIA_TYPE_VIDEO, | |
935 | .id = AV_CODEC_ID_MSMPEG4V2, | |
936 | .priv_data_size = sizeof(MpegEncContext), | |
937 | .init = ff_msmpeg4_decode_init, | |
938 | .close = ff_h263_decode_end, | |
939 | .decode = ff_h263_decode_frame, | |
940 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, | |
941 | .max_lowres = 3, | |
942 | .pix_fmts = (const enum AVPixelFormat[]) { | |
943 | AV_PIX_FMT_YUV420P, | |
944 | AV_PIX_FMT_NONE | |
945 | }, | |
946 | }; | |
947 | ||
948 | AVCodec ff_msmpeg4v3_decoder = { | |
949 | .name = "msmpeg4", | |
950 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"), | |
951 | .type = AVMEDIA_TYPE_VIDEO, | |
952 | .id = AV_CODEC_ID_MSMPEG4V3, | |
953 | .priv_data_size = sizeof(MpegEncContext), | |
954 | .init = ff_msmpeg4_decode_init, | |
955 | .close = ff_h263_decode_end, | |
956 | .decode = ff_h263_decode_frame, | |
957 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, | |
958 | .max_lowres = 3, | |
959 | .pix_fmts = (const enum AVPixelFormat[]) { | |
960 | AV_PIX_FMT_YUV420P, | |
961 | AV_PIX_FMT_NONE | |
962 | }, | |
963 | }; | |
964 | ||
965 | AVCodec ff_wmv1_decoder = { | |
966 | .name = "wmv1", | |
967 | .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 7"), | |
968 | .type = AVMEDIA_TYPE_VIDEO, | |
969 | .id = AV_CODEC_ID_WMV1, | |
970 | .priv_data_size = sizeof(MpegEncContext), | |
971 | .init = ff_msmpeg4_decode_init, | |
972 | .close = ff_h263_decode_end, | |
973 | .decode = ff_h263_decode_frame, | |
974 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, | |
975 | .max_lowres = 3, | |
976 | .pix_fmts = (const enum AVPixelFormat[]) { | |
977 | AV_PIX_FMT_YUV420P, | |
978 | AV_PIX_FMT_NONE | |
979 | }, | |
980 | }; |