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//@{ 37enum 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//@{ 47enum 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//@{ 58enum 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//@{ 68enum 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//@{ 78enum 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//@{ 89enum 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//@{ 101enum 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//@{ 111enum 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 123enum 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//@{ 136enum 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 */ 148enum 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 */ 158enum 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 */ 173typedef struct VC1Context{ 174 MpegEncContext s; 175 IntraX8Context x8; 176 H264ChromaContext h264chroma; 177 VC1DSPContext vc1dsp; 178 179 /** Simple/Main Profile sequence header */ 180 //@{ 181 int res_sprite; ///< reserved, sprite mode 182 int res_y411; ///< reserved, old interlaced mode 183 int res_x8; ///< reserved 184 int multires; ///< frame-level RESPIC syntax element present 185 int res_fasttx; ///< reserved, always 1 186 int res_transtab; ///< reserved, always 0 187 int rangered; ///< RANGEREDFRM (range reduction) syntax element present 188 ///< at frame level 189 int res_rtm_flag; ///< reserved, set to 1 190 int reserved; ///< reserved 191 //@} 192 193 /** Advanced Profile */ 194 //@{ 195 int level; ///< 3 bits, for Advanced/Simple Profile, provided by TS layer 196 int chromaformat; ///< 2 bits, 2=4:2:0, only defined 197 int postprocflag; ///< Per-frame processing suggestion flag present 198 int broadcast; ///< TFF/RFF present 199 int interlace; ///< Progressive/interlaced (RPTFTM syntax element) 200 int tfcntrflag; ///< TFCNTR present 201 int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present 202 int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers 203 int extended_dmv; ///< Additional extended dmv range at P/B-frame-level 204 int color_prim; ///< 8 bits, chroma coordinates of the color primaries 205 int transfer_char; ///< 8 bits, Opto-electronic transfer characteristics 206 int matrix_coef; ///< 8 bits, Color primaries->YCbCr transform matrix 207 int hrd_param_flag; ///< Presence of Hypothetical Reference 208 ///< Decoder parameters 209 int psf; ///< Progressive Segmented Frame 210 //@} 211 212 /** Sequence header data for all Profiles 213 * TODO: choose between ints, uint8_ts and monobit flags 214 */ 215 //@{ 216 int profile; ///< 2 bits, Profile 217 int frmrtq_postproc; ///< 3 bits, 218 int bitrtq_postproc; ///< 5 bits, quantized framerate-based postprocessing strength 219 int max_coded_width, max_coded_height; 220 int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple) 221 int extended_mv; ///< Ext MV in P/B (not in Simple) 222 int dquant; ///< How qscale varies with MBs, 2 bits (not in Simple) 223 int vstransform; ///< variable-size [48]x[48] transform type + info 224 int overlap; ///< overlapped transforms in use 225 int quantizer_mode; ///< 2 bits, quantizer mode used for sequence, see QUANT_* 226 int finterpflag; ///< INTERPFRM present 227 //@} 228 229 /** Frame decoding info for all profiles */ 230 //@{ 231 uint8_t mv_mode; ///< MV coding mode 232 uint8_t mv_mode2; ///< Secondary MV coding mode (B-frames) 233 int k_x; ///< Number of bits for MVs (depends on MV range) 234 int k_y; ///< Number of bits for MVs (depends on MV range) 235 int range_x, range_y; ///< MV range 236 uint8_t pq, altpq; ///< Current/alternate frame quantizer scale 237 uint8_t zz_8x8[4][64]; ///< Zigzag table for TT_8x8, permuted for IDCT 238 int left_blk_sh, top_blk_sh; ///< Either 3 or 0, positions of l/t in blk[] 239 const uint8_t* zz_8x4; ///< Zigzag scan table for TT_8x4 coding mode 240 const uint8_t* zz_4x8; ///< Zigzag scan table for TT_4x8 coding mode 241 /** pquant parameters */ 242 //@{ 243 uint8_t dquantfrm; 244 uint8_t dqprofile; 245 uint8_t dqsbedge; 246 uint8_t dqbilevel; 247 //@} 248 /** AC coding set indexes 249 * @see 8.1.1.10, p(1)10 250 */ 251 //@{ 252 int c_ac_table_index; ///< Chroma index from ACFRM element 253 int y_ac_table_index; ///< Luma index from AC2FRM element 254 //@} 255 int ttfrm; ///< Transform type info present at frame level 256 uint8_t ttmbf; ///< Transform type flag 257 int *ttblk_base, *ttblk; ///< Transform type at the block level 258 int codingset; ///< index of current table set from 11.8 to use for luma block decoding 259 int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding 260 int pqindex; ///< raw pqindex used in coding set selection 261 int a_avail, c_avail; 262 uint8_t *mb_type_base, *mb_type[3]; 263 264 265 /** Luma compensation parameters */ 266 //@{ 267 uint8_t lumscale; 268 uint8_t lumshift; 269 //@} 270 int16_t bfraction; ///< Relative position % anchors=> how to scale MVs 271 uint8_t halfpq; ///< Uniform quant over image and qp+.5 272 uint8_t respic; ///< Frame-level flag for resized images 273 int buffer_fullness; ///< HRD info 274 /** Ranges: 275 * -# 0 -> [-64n 63.f] x [-32, 31.f] 276 * -# 1 -> [-128, 127.f] x [-64, 63.f] 277 * -# 2 -> [-512, 511.f] x [-128, 127.f] 278 * -# 3 -> [-1024, 1023.f] x [-256, 255.f] 279 */ 280 uint8_t mvrange; ///< Extended MV range flag 281 uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use 282 VLC *cbpcy_vlc; ///< CBPCY VLC table 283 int tt_index; ///< Index for Transform Type tables (to decode TTMB) 284 uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV) 285 uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs 286 uint8_t* forward_mb_plane; ///< bitplane for "forward" MBs 287 int mv_type_is_raw; ///< mv type mb plane is not coded 288 int dmb_is_raw; ///< direct mb plane is raw 289 int fmb_is_raw; ///< forward mb plane is raw 290 int skip_is_raw; ///< skip mb plane is not coded 291 uint8_t last_luty[2][256], last_lutuv[2][256]; ///< lookup tables used for intensity compensation 292 uint8_t aux_luty[2][256], aux_lutuv[2][256]; ///< lookup tables used for intensity compensation 293 uint8_t next_luty[2][256], next_lutuv[2][256]; ///< lookup tables used for intensity compensation 294 uint8_t (*curr_luty)[256] ,(*curr_lutuv)[256]; 295 int last_use_ic, *curr_use_ic, next_use_ic, aux_use_ic; 296 int rnd; ///< rounding control 297 int cbptab; 298 299 /** Frame decoding info for S/M profiles only */ 300 //@{ 301 uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128) 302 uint8_t interpfrm; 303 //@} 304 305 /** Frame decoding info for Advanced profile */ 306 //@{ 307 enum FrameCodingMode fcm; 308 uint8_t numpanscanwin; 309 uint8_t tfcntr; 310 uint8_t rptfrm, tff, rff; 311 uint16_t topleftx; 312 uint16_t toplefty; 313 uint16_t bottomrightx; 314 uint16_t bottomrighty; 315 uint8_t uvsamp; 316 uint8_t postproc; 317 int hrd_num_leaky_buckets; 318 uint8_t bit_rate_exponent; 319 uint8_t buffer_size_exponent; 320 uint8_t* acpred_plane; ///< AC prediction flags bitplane 321 int acpred_is_raw; 322 uint8_t* over_flags_plane; ///< Overflags bitplane 323 int overflg_is_raw; 324 uint8_t condover; 325 uint8_t range_mapy_flag; 326 uint8_t range_mapuv_flag; 327 uint8_t range_mapy; 328 uint8_t range_mapuv; 329 //@} 330 331 /** Frame decoding info for interlaced picture */ 332 uint8_t dmvrange; ///< Extended differential MV range flag 333 int fourmvswitch; 334 int intcomp; 335 uint8_t lumscale2; ///< for interlaced field P picture 336 uint8_t lumshift2; 337 VLC* mbmode_vlc; 338 VLC* imv_vlc; 339 VLC* twomvbp_vlc; 340 VLC* fourmvbp_vlc; 341 uint8_t twomvbp; 342 uint8_t fourmvbp; 343 uint8_t* fieldtx_plane; 344 int fieldtx_is_raw; 345 uint8_t zzi_8x8[64]; 346 uint8_t *blk_mv_type_base, *blk_mv_type; ///< 0: frame MV, 1: field MV (interlaced frame) 347 uint8_t *mv_f_base, *mv_f[2]; ///< 0: MV obtained from same field, 1: opposite field 348 uint8_t *mv_f_next_base, *mv_f_next[2]; 349 int field_mode; ///< 1 for interlaced field pictures 350 int fptype; 351 int second_field; 352 int refdist; ///< distance of the current picture from reference 353 int numref; ///< number of past field pictures used as reference 354 // 0 corresponds to 1 and 1 corresponds to 2 references 355 int reffield; ///< if numref = 0 (1 reference) then reffield decides which 356 // field to use among the two fields from previous frame 357 int intcompfield; ///< which of the two fields to be intensity compensated 358 // 0: both fields, 1: bottom field, 2: top field 359 int cur_field_type; ///< 0: top, 1: bottom 360 int ref_field_type[2]; ///< forward and backward reference field type (top or bottom) 361 int blocks_off, mb_off; 362 int qs_last; ///< if qpel has been used in the previous (tr.) picture 363 int bmvtype; 364 int frfd, brfd; ///< reference frame distance (forward or backward) 365 int first_pic_header_flag; 366 int pic_header_flag; 367 int mbmodetab; 368 int icbptab; 369 int imvtab; 370 int twomvbptab; 371 int fourmvbptab; 372 373 /** Frame decoding info for sprite modes */ 374 //@{ 375 int new_sprite; 376 int two_sprites; 377 AVFrame *sprite_output_frame; 378 int output_width, output_height, sprite_width, sprite_height; 379 uint8_t* sr_rows[2][2]; ///< Sprite resizer line cache 380 //@} 381 382 int p_frame_skipped; 383 int bi_type; 384 int x8_type; 385 386 int16_t (*block)[6][64]; 387 int n_allocated_blks, cur_blk_idx, left_blk_idx, topleft_blk_idx, top_blk_idx; 388 uint32_t *cbp_base, *cbp; 389 uint8_t *is_intra_base, *is_intra; 390 int16_t (*luma_mv_base)[2], (*luma_mv)[2]; 391 uint8_t bfraction_lut_index; ///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[]) 392 uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element) 393 uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element) 394 395 int end_mb_x; ///< Horizontal macroblock limit (used only by mss2) 396 397 int parse_only; ///< Context is used within parser 398 int resync_marker; ///< could this stream contain resync markers 399} VC1Context; 400 401/** 402 * Decode Simple/Main Profiles sequence header 403 * @see Figure 7-8, p16-17 404 * @param avctx Codec context 405 * @param gb GetBit context initialized from Codec context extra_data 406 * @return Status 407 */ 408int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); 409 410int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); 411 412int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb); 413int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb); 414void ff_vc1_init_common(VC1Context *v); 415 416int ff_vc1_decode_init_alloc_tables(VC1Context *v); 417void ff_vc1_init_transposed_scantables(VC1Context *v); 418int ff_vc1_decode_end(AVCodecContext *avctx); 419void ff_vc1_decode_blocks(VC1Context *v); 420 421void ff_vc1_i_overlap_filter(VC1Context *v); 422void ff_vc1_p_overlap_filter(VC1Context *v); 423void ff_vc1_i_loop_filter(VC1Context *v); 424void ff_vc1_p_loop_filter(VC1Context *v); 425void ff_vc1_p_intfr_loop_filter(VC1Context *v); 426void ff_vc1_b_intfi_loop_filter(VC1Context *v); 427 428void ff_vc1_mc_1mv(VC1Context *v, int dir); 429void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg); 430void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir); 431void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg); 432 433void ff_vc1_interp_mc(VC1Context *v); 434 435#endif /* AVCODEC_VC1_H */ 436