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1 | /* |
2 | * VC-1 and WMV3 decoder | |
3 | * Copyright (c) 2006-2007 Konstantin Shishkov | |
4 | * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #ifndef AVCODEC_VC1_H | |
24 | #define AVCODEC_VC1_H | |
25 | ||
26 | #include "avcodec.h" | |
27 | #include "h264chroma.h" | |
28 | #include "mpegvideo.h" | |
29 | #include "intrax8.h" | |
30 | #include "vc1_common.h" | |
31 | #include "vc1dsp.h" | |
32 | ||
33 | #define AC_VLC_BITS 9 | |
34 | ||
35 | /** Sequence quantizer mode */ | |
36 | //@{ | |
37 | enum QuantMode { | |
38 | QUANT_FRAME_IMPLICIT, ///< Implicitly specified at frame level | |
39 | QUANT_FRAME_EXPLICIT, ///< Explicitly specified at frame level | |
40 | QUANT_NON_UNIFORM, ///< Non-uniform quant used for all frames | |
41 | QUANT_UNIFORM ///< Uniform quant used for all frames | |
42 | }; | |
43 | //@} | |
44 | ||
45 | /** Where quant can be changed */ | |
46 | //@{ | |
47 | enum DQProfile { | |
48 | DQPROFILE_FOUR_EDGES, | |
49 | DQPROFILE_DOUBLE_EDGES, | |
50 | DQPROFILE_SINGLE_EDGE, | |
51 | DQPROFILE_ALL_MBS | |
52 | }; | |
53 | //@} | |
54 | ||
55 | /** @name Where quant can be changed | |
56 | */ | |
57 | //@{ | |
58 | enum DQSingleEdge { | |
59 | DQSINGLE_BEDGE_LEFT, | |
60 | DQSINGLE_BEDGE_TOP, | |
61 | DQSINGLE_BEDGE_RIGHT, | |
62 | DQSINGLE_BEDGE_BOTTOM | |
63 | }; | |
64 | //@} | |
65 | ||
66 | /** Which pair of edges is quantized with ALTPQUANT */ | |
67 | //@{ | |
68 | enum DQDoubleEdge { | |
69 | DQDOUBLE_BEDGE_TOPLEFT, | |
70 | DQDOUBLE_BEDGE_TOPRIGHT, | |
71 | DQDOUBLE_BEDGE_BOTTOMRIGHT, | |
72 | DQDOUBLE_BEDGE_BOTTOMLEFT | |
73 | }; | |
74 | //@} | |
75 | ||
76 | /** MV modes for P frames */ | |
77 | //@{ | |
78 | enum MVModes { | |
79 | MV_PMODE_1MV_HPEL_BILIN, | |
80 | MV_PMODE_1MV, | |
81 | MV_PMODE_1MV_HPEL, | |
82 | MV_PMODE_MIXED_MV, | |
83 | MV_PMODE_INTENSITY_COMP | |
84 | }; | |
85 | //@} | |
86 | ||
87 | /** MBMODE for interlaced frame P-picture */ | |
88 | //@{ | |
89 | enum MBModesIntfr { | |
90 | MV_PMODE_INTFR_1MV, | |
91 | MV_PMODE_INTFR_2MV_FIELD, | |
92 | MV_PMODE_INTFR_2MV, | |
93 | MV_PMODE_INTFR_4MV_FIELD, | |
94 | MV_PMODE_INTFR_4MV, | |
95 | MV_PMODE_INTFR_INTRA, | |
96 | }; | |
97 | //@} | |
98 | ||
99 | /** @name MV types for B frames */ | |
100 | //@{ | |
101 | enum BMVTypes { | |
102 | BMV_TYPE_BACKWARD, | |
103 | BMV_TYPE_FORWARD, | |
104 | BMV_TYPE_INTERPOLATED, | |
105 | BMV_TYPE_DIRECT | |
106 | }; | |
107 | //@} | |
108 | ||
109 | /** @name Block types for P/B frames */ | |
110 | //@{ | |
111 | enum TransformTypes { | |
112 | TT_8X8, | |
113 | TT_8X4_BOTTOM, | |
114 | TT_8X4_TOP, | |
115 | TT_8X4, // both halves | |
116 | TT_4X8_RIGHT, | |
117 | TT_4X8_LEFT, | |
118 | TT_4X8, // both halves | |
119 | TT_4X4 | |
120 | }; | |
121 | //@} | |
122 | ||
123 | enum CodingSet { | |
124 | CS_HIGH_MOT_INTRA = 0, | |
125 | CS_HIGH_MOT_INTER, | |
126 | CS_LOW_MOT_INTRA, | |
127 | CS_LOW_MOT_INTER, | |
128 | CS_MID_RATE_INTRA, | |
129 | CS_MID_RATE_INTER, | |
130 | CS_HIGH_RATE_INTRA, | |
131 | CS_HIGH_RATE_INTER | |
132 | }; | |
133 | ||
134 | /** @name Overlap conditions for Advanced Profile */ | |
135 | //@{ | |
136 | enum COTypes { | |
137 | CONDOVER_NONE = 0, | |
138 | CONDOVER_ALL, | |
139 | CONDOVER_SELECT | |
140 | }; | |
141 | //@} | |
142 | ||
143 | /** | |
144 | * FCM Frame Coding Mode | |
145 | * @note some content might be marked interlaced | |
146 | * but have fcm set to 0 as well (e.g. HD-DVD) | |
147 | */ | |
148 | enum FrameCodingMode { | |
149 | PROGRESSIVE = 0, ///< in the bitstream is reported as 00b | |
150 | ILACE_FRAME, ///< in the bitstream is reported as 10b | |
151 | ILACE_FIELD ///< in the bitstream is reported as 11b | |
152 | }; | |
153 | ||
154 | /** | |
155 | * Imode types | |
156 | * @{ | |
157 | */ | |
158 | enum Imode { | |
159 | IMODE_RAW, | |
160 | IMODE_NORM2, | |
161 | IMODE_DIFF2, | |
162 | IMODE_NORM6, | |
163 | IMODE_DIFF6, | |
164 | IMODE_ROWSKIP, | |
165 | IMODE_COLSKIP | |
166 | }; | |
167 | /** @} */ //imode defines | |
168 | ||
169 | /** The VC1 Context | |
170 | * @todo Change size wherever another size is more efficient | |
171 | * Many members are only used for Advanced Profile | |
172 | */ | |
173 | typedef struct VC1Context{ | |
174 | MpegEncContext s; | |
175 | IntraX8Context x8; | |
176 | H264ChromaContext h264chroma; | |
177 | VC1DSPContext vc1dsp; | |
178 | ||
179 | int bits; | |
180 | ||
181 | /** Simple/Main Profile sequence header */ | |
182 | //@{ | |
183 | int res_sprite; ///< reserved, sprite mode | |
184 | int res_y411; ///< reserved, old interlaced mode | |
185 | int res_x8; ///< reserved | |
186 | int multires; ///< frame-level RESPIC syntax element present | |
187 | int res_fasttx; ///< reserved, always 1 | |
188 | int res_transtab; ///< reserved, always 0 | |
189 | int rangered; ///< RANGEREDFRM (range reduction) syntax element present | |
190 | ///< at frame level | |
191 | int res_rtm_flag; ///< reserved, set to 1 | |
192 | int reserved; ///< reserved | |
193 | //@} | |
194 | ||
195 | /** Advanced Profile */ | |
196 | //@{ | |
197 | int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer | |
198 | int chromaformat; ///< 2bits, 2=4:2:0, only defined | |
199 | int postprocflag; ///< Per-frame processing suggestion flag present | |
200 | int broadcast; ///< TFF/RFF present | |
201 | int interlace; ///< Progressive/interlaced (RPTFTM syntax element) | |
202 | int tfcntrflag; ///< TFCNTR present | |
203 | int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present | |
204 | int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers | |
205 | int extended_dmv; ///< Additional extended dmv range at P/B frame-level | |
f6fa7814 DM |
206 | int color_prim; ///< 8bits, chroma coordinates of the color primaries |
207 | int transfer_char; ///< 8bits, Opto-electronic transfer characteristics | |
208 | int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix | |
2ba45a60 DM |
209 | int hrd_param_flag; ///< Presence of Hypothetical Reference |
210 | ///< Decoder parameters | |
211 | int psf; ///< Progressive Segmented Frame | |
212 | //@} | |
213 | ||
214 | /** Sequence header data for all Profiles | |
215 | * TODO: choose between ints, uint8_ts and monobit flags | |
216 | */ | |
217 | //@{ | |
218 | int profile; ///< 2bits, Profile | |
219 | int frmrtq_postproc; ///< 3bits, | |
220 | int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength | |
221 | int max_coded_width, max_coded_height; | |
222 | int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple) | |
223 | int extended_mv; ///< Ext MV in P/B (not in Simple) | |
224 | int dquant; ///< How qscale varies with MBs, 2bits (not in Simple) | |
225 | int vstransform; ///< variable-size [48]x[48] transform type + info | |
226 | int overlap; ///< overlapped transforms in use | |
227 | int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_* | |
228 | int finterpflag; ///< INTERPFRM present | |
229 | //@} | |
230 | ||
231 | /** Frame decoding info for all profiles */ | |
232 | //@{ | |
233 | uint8_t mv_mode; ///< MV coding monde | |
234 | uint8_t mv_mode2; ///< Secondary MV coding mode (B frames) | |
235 | int k_x; ///< Number of bits for MVs (depends on MV range) | |
236 | int k_y; ///< Number of bits for MVs (depends on MV range) | |
237 | int range_x, range_y; ///< MV range | |
238 | uint8_t pq, altpq; ///< Current/alternate frame quantizer scale | |
239 | uint8_t zz_8x8[4][64]; ///< Zigzag table for TT_8x8, permuted for IDCT | |
240 | int left_blk_sh, top_blk_sh; ///< Either 3 or 0, positions of l/t in blk[] | |
241 | const uint8_t* zz_8x4; ///< Zigzag scan table for TT_8x4 coding mode | |
242 | const uint8_t* zz_4x8; ///< Zigzag scan table for TT_4x8 coding mode | |
243 | /** pquant parameters */ | |
244 | //@{ | |
245 | uint8_t dquantfrm; | |
246 | uint8_t dqprofile; | |
247 | uint8_t dqsbedge; | |
248 | uint8_t dqbilevel; | |
249 | //@} | |
250 | /** AC coding set indexes | |
251 | * @see 8.1.1.10, p(1)10 | |
252 | */ | |
253 | //@{ | |
254 | int c_ac_table_index; ///< Chroma index from ACFRM element | |
255 | int y_ac_table_index; ///< Luma index from AC2FRM element | |
256 | //@} | |
257 | int ttfrm; ///< Transform type info present at frame level | |
258 | uint8_t ttmbf; ///< Transform type flag | |
259 | int *ttblk_base, *ttblk; ///< Transform type at the block level | |
260 | int codingset; ///< index of current table set from 11.8 to use for luma block decoding | |
261 | int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding | |
262 | int pqindex; ///< raw pqindex used in coding set selection | |
263 | int a_avail, c_avail; | |
264 | uint8_t *mb_type_base, *mb_type[3]; | |
265 | ||
266 | ||
267 | /** Luma compensation parameters */ | |
268 | //@{ | |
269 | uint8_t lumscale; | |
270 | uint8_t lumshift; | |
271 | //@} | |
272 | int16_t bfraction; ///< Relative position % anchors=> how to scale MVs | |
273 | uint8_t halfpq; ///< Uniform quant over image and qp+.5 | |
274 | uint8_t respic; ///< Frame-level flag for resized images | |
275 | int buffer_fullness; ///< HRD info | |
276 | /** Ranges: | |
277 | * -# 0 -> [-64n 63.f] x [-32, 31.f] | |
278 | * -# 1 -> [-128, 127.f] x [-64, 63.f] | |
279 | * -# 2 -> [-512, 511.f] x [-128, 127.f] | |
280 | * -# 3 -> [-1024, 1023.f] x [-256, 255.f] | |
281 | */ | |
282 | uint8_t mvrange; ///< Extended MV range flag | |
283 | uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use | |
284 | VLC *cbpcy_vlc; ///< CBPCY VLC table | |
285 | int tt_index; ///< Index for Transform Type tables (to decode TTMB) | |
286 | uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV) | |
287 | uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs | |
288 | uint8_t* forward_mb_plane; ///< bitplane for "forward" MBs | |
289 | int mv_type_is_raw; ///< mv type mb plane is not coded | |
290 | int dmb_is_raw; ///< direct mb plane is raw | |
291 | int fmb_is_raw; ///< forward mb plane is raw | |
292 | int skip_is_raw; ///< skip mb plane is not coded | |
293 | uint8_t last_luty[2][256], last_lutuv[2][256]; ///< lookup tables used for intensity compensation | |
294 | uint8_t aux_luty[2][256], aux_lutuv[2][256]; ///< lookup tables used for intensity compensation | |
295 | uint8_t next_luty[2][256], next_lutuv[2][256]; ///< lookup tables used for intensity compensation | |
296 | uint8_t (*curr_luty)[256] ,(*curr_lutuv)[256]; | |
297 | int last_use_ic, *curr_use_ic, next_use_ic, aux_use_ic; | |
298 | int rnd; ///< rounding control | |
299 | ||
300 | /** Frame decoding info for S/M profiles only */ | |
301 | //@{ | |
302 | uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128) | |
303 | uint8_t interpfrm; | |
304 | //@} | |
305 | ||
306 | /** Frame decoding info for Advanced profile */ | |
307 | //@{ | |
308 | enum FrameCodingMode fcm; | |
309 | uint8_t numpanscanwin; | |
310 | uint8_t tfcntr; | |
311 | uint8_t rptfrm, tff, rff; | |
312 | uint16_t topleftx; | |
313 | uint16_t toplefty; | |
314 | uint16_t bottomrightx; | |
315 | uint16_t bottomrighty; | |
316 | uint8_t uvsamp; | |
317 | uint8_t postproc; | |
318 | int hrd_num_leaky_buckets; | |
319 | uint8_t bit_rate_exponent; | |
320 | uint8_t buffer_size_exponent; | |
321 | uint8_t* acpred_plane; ///< AC prediction flags bitplane | |
322 | int acpred_is_raw; | |
323 | uint8_t* over_flags_plane; ///< Overflags bitplane | |
324 | int overflg_is_raw; | |
325 | uint8_t condover; | |
326 | uint16_t *hrd_rate, *hrd_buffer; | |
327 | uint8_t *hrd_fullness; | |
328 | uint8_t range_mapy_flag; | |
329 | uint8_t range_mapuv_flag; | |
330 | uint8_t range_mapy; | |
331 | uint8_t range_mapuv; | |
332 | //@} | |
333 | ||
334 | /** Frame decoding info for interlaced picture */ | |
335 | uint8_t dmvrange; ///< Extended differential MV range flag | |
336 | int fourmvswitch; | |
337 | int intcomp; | |
338 | uint8_t lumscale2; ///< for interlaced field P picture | |
339 | uint8_t lumshift2; | |
340 | VLC* mbmode_vlc; | |
341 | VLC* imv_vlc; | |
342 | VLC* twomvbp_vlc; | |
343 | VLC* fourmvbp_vlc; | |
344 | uint8_t twomvbp; | |
345 | uint8_t fourmvbp; | |
346 | uint8_t* fieldtx_plane; | |
347 | int fieldtx_is_raw; | |
348 | uint8_t zzi_8x8[64]; | |
349 | uint8_t *blk_mv_type_base, *blk_mv_type; ///< 0: frame MV, 1: field MV (interlaced frame) | |
350 | uint8_t *mv_f_base, *mv_f[2]; ///< 0: MV obtained from same field, 1: opposite field | |
351 | uint8_t *mv_f_next_base, *mv_f_next[2]; | |
352 | int field_mode; ///< 1 for interlaced field pictures | |
353 | int fptype; | |
354 | int second_field; | |
355 | int refdist; ///< distance of the current picture from reference | |
356 | int numref; ///< number of past field pictures used as reference | |
357 | // 0 corresponds to 1 and 1 corresponds to 2 references | |
358 | int reffield; ///< if numref = 0 (1 reference) then reffield decides which | |
359 | // field to use among the two fields from previous frame | |
360 | int intcompfield; ///< which of the two fields to be intensity compensated | |
361 | // 0: both fields, 1: bottom field, 2: top field | |
362 | int cur_field_type; ///< 0: top, 1: bottom | |
363 | int ref_field_type[2]; ///< forward and backward reference field type (top or bottom) | |
364 | int blocks_off, mb_off; | |
365 | int qs_last; ///< if qpel has been used in the previous (tr.) picture | |
366 | int bmvtype; | |
367 | int frfd, brfd; ///< reference frame distance (forward or backward) | |
368 | int first_pic_header_flag; | |
369 | int pic_header_flag; | |
370 | ||
371 | /** Frame decoding info for sprite modes */ | |
372 | //@{ | |
373 | int new_sprite; | |
374 | int two_sprites; | |
375 | AVFrame *sprite_output_frame; | |
376 | int output_width, output_height, sprite_width, sprite_height; | |
377 | uint8_t* sr_rows[2][2]; ///< Sprite resizer line cache | |
378 | //@} | |
379 | ||
380 | int p_frame_skipped; | |
381 | int bi_type; | |
382 | int x8_type; | |
383 | ||
384 | int16_t (*block)[6][64]; | |
385 | int n_allocated_blks, cur_blk_idx, left_blk_idx, topleft_blk_idx, top_blk_idx; | |
386 | uint32_t *cbp_base, *cbp; | |
387 | uint8_t *is_intra_base, *is_intra; | |
388 | int16_t (*luma_mv_base)[2], (*luma_mv)[2]; | |
389 | uint8_t bfraction_lut_index; ///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[]) | |
390 | uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element) | |
391 | uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element) | |
392 | ||
393 | int end_mb_x; ///< Horizontal macroblock limit (used only by mss2) | |
394 | ||
395 | int parse_only; ///< Context is used within parser | |
396 | int resync_marker; ///< could this stream contain resync markers | |
397 | } VC1Context; | |
398 | ||
399 | /** | |
400 | * Decode Simple/Main Profiles sequence header | |
401 | * @see Figure 7-8, p16-17 | |
402 | * @param avctx Codec context | |
403 | * @param gb GetBit context initialized from Codec context extra_data | |
404 | * @return Status | |
405 | */ | |
406 | int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); | |
407 | ||
408 | int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); | |
409 | ||
410 | int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb); | |
411 | int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb); | |
412 | int ff_vc1_init_common(VC1Context *v); | |
413 | ||
414 | int ff_vc1_decode_init_alloc_tables(VC1Context *v); | |
415 | void ff_vc1_init_transposed_scantables(VC1Context *v); | |
416 | int ff_vc1_decode_end(AVCodecContext *avctx); | |
417 | void ff_vc1_decode_blocks(VC1Context *v); | |
418 | ||
f6fa7814 DM |
419 | void ff_vc1_loop_filter_iblk(VC1Context *v, int pq); |
420 | void ff_vc1_loop_filter_iblk_delayed(VC1Context *v, int pq); | |
421 | void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v); | |
422 | void ff_vc1_apply_p_loop_filter(VC1Context *v); | |
423 | ||
424 | void ff_vc1_mc_1mv(VC1Context *v, int dir); | |
425 | void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg); | |
426 | void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir); | |
427 | void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg); | |
428 | ||
429 | void ff_vc1_interp_mc(VC1Context *v); | |
430 | ||
2ba45a60 | 431 | #endif /* AVCODEC_VC1_H */ |