blob: 556906d496189b8e48adf3bab5423ce269f9356f
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; ///< 3 bits, for Advanced/Simple Profile, provided by TS layer |
198 | int chromaformat; ///< 2 bits, 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 |
206 | int color_prim; ///< 8 bits, chroma coordinates of the color primaries |
207 | int transfer_char; ///< 8 bits, Opto-electronic transfer characteristics |
208 | int matrix_coef; ///< 8 bits, Color primaries->YCbCr transform matrix |
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; ///< 2 bits, Profile |
219 | int frmrtq_postproc; ///< 3 bits, |
220 | int bitrtq_postproc; ///< 5 bits, 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, 2 bits (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; ///< 2 bits, 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 mode |
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 | |
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 | |
431 | #endif /* AVCODEC_VC1_H */ |
432 |