1/* 2 * Generic DCT based hybrid video encoder 3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 4 * Copyright (c) 2002-2004 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/** 24 * @file 25 * mpegvideo header. 26 */ 27 28#ifndef AVCODEC_MPEGVIDEO_H 29#define AVCODEC_MPEGVIDEO_H 30 31#include "dsputil.h" 32#include "get_bits.h" 33#include "put_bits.h" 34#include "ratecontrol.h" 35#include "parser.h" 36#include "mpeg12data.h" 37#include "rl.h" 38 39#define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded 40 41enum OutputFormat { 42 FMT_MPEG1, 43 FMT_H261, 44 FMT_H263, 45 FMT_MJPEG, 46 FMT_H264, 47}; 48 49#define MPEG_BUF_SIZE (16 * 1024) 50 51#define QMAT_SHIFT_MMX 16 52#define QMAT_SHIFT 22 53 54#define MAX_FCODE 7 55#define MAX_MV 2048 56 57#define MAX_THREADS 16 58 59#define MAX_PICTURE_COUNT 32 60 61#define ME_MAP_SIZE 64 62#define ME_MAP_SHIFT 3 63#define ME_MAP_MV_BITS 11 64 65#define MAX_MB_BYTES (30*16*16*3/8 + 120) 66 67#define INPLACE_OFFSET 16 68 69/* Start codes. */ 70#define SEQ_END_CODE 0x000001b7 71#define SEQ_START_CODE 0x000001b3 72#define GOP_START_CODE 0x000001b8 73#define PICTURE_START_CODE 0x00000100 74#define SLICE_MIN_START_CODE 0x00000101 75#define SLICE_MAX_START_CODE 0x000001af 76#define EXT_START_CODE 0x000001b5 77#define USER_START_CODE 0x000001b2 78 79/** 80 * Picture. 81 */ 82typedef struct Picture{ 83 FF_COMMON_FRAME 84 85 /** 86 * halfpel luma planes. 87 */ 88 uint8_t *interpolated[3]; 89 int16_t (*motion_val_base[2])[2]; 90 uint32_t *mb_type_base; 91#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type 92#define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4) 93#define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16) 94#define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM) 95#define IS_INTRA(a) ((a)&7) 96#define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8)) 97#define IS_SKIP(a) ((a)&MB_TYPE_SKIP) 98#define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM) 99#define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED) 100#define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2) 101#define IS_GMC(a) ((a)&MB_TYPE_GMC) 102#define IS_16X16(a) ((a)&MB_TYPE_16x16) 103#define IS_16X8(a) ((a)&MB_TYPE_16x8) 104#define IS_8X16(a) ((a)&MB_TYPE_8x16) 105#define IS_8X8(a) ((a)&MB_TYPE_8x8) 106#define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused 107#define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused 108#define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused 109#define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused 110#define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED) 111#define IS_QUANT(a) ((a)&MB_TYPE_QUANT) 112#define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list)))) 113#define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note does not work if subMBs 114#define HAS_CBP(a) ((a)&MB_TYPE_CBP) 115 116 int field_poc[2]; ///< h264 top/bottom POC 117 int poc; ///< h264 frame POC 118 int frame_num; ///< h264 frame_num (raw frame_num from slice header) 119 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET. 120 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num, 121 pic_num & max_pic_num; long -> long_pic_num) */ 122 int long_ref; ///< 1->long term reference 0->short term reference 123 int ref_poc[2][2][16]; ///< h264 POCs of the frames used as reference (FIXME need per slice) 124 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice) 125 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF 126 127 int mb_var_sum; ///< sum of MB variance for current frame 128 int mc_mb_var_sum; ///< motion compensated MB variance for current frame 129 uint16_t *mb_var; ///< Table for MB variances 130 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances 131 uint8_t *mb_mean; ///< Table for MB luminance 132 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove 133 int b_frame_score; /* */ 134} Picture; 135 136struct MpegEncContext; 137 138/** 139 * Motion estimation context. 140 */ 141typedef struct MotionEstContext{ 142 AVCodecContext *avctx; 143 int skip; ///< set if ME is skipped for the current MB 144 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME 145 int direct_basis_mv[4][2]; 146 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free 147 uint8_t *best_mb; 148 uint8_t *temp_mb[2]; 149 uint8_t *temp; 150 int best_bits; 151 uint32_t *map; ///< map to avoid duplicate evaluations 152 uint32_t *score_map; ///< map to store the scores 153 int map_generation; 154 int pre_penalty_factor; 155 int penalty_factor; /*!< an estimate of the bits required to 156 code a given mv value, e.g. (1,0) takes 157 more bits than (0,0). We have to 158 estimate whether any reduction in 159 residual is worth the extra bits. */ 160 int sub_penalty_factor; 161 int mb_penalty_factor; 162 int flags; 163 int sub_flags; 164 int mb_flags; 165 int pre_pass; ///< = 1 for the pre pass 166 int dia_size; 167 int xmin; 168 int xmax; 169 int ymin; 170 int ymax; 171 int pred_x; 172 int pred_y; 173 uint8_t *src[4][4]; 174 uint8_t *ref[4][4]; 175 int stride; 176 int uvstride; 177 /* temp variables for picture complexity calculation */ 178 int mc_mb_var_sum_temp; 179 int mb_var_sum_temp; 180 int scene_change_score; 181/* cmp, chroma_cmp;*/ 182 op_pixels_func (*hpel_put)[4]; 183 op_pixels_func (*hpel_avg)[4]; 184 qpel_mc_func (*qpel_put)[16]; 185 qpel_mc_func (*qpel_avg)[16]; 186 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV 187 uint8_t *current_mv_penalty; 188 int (*sub_motion_search)(struct MpegEncContext * s, 189 int *mx_ptr, int *my_ptr, int dmin, 190 int src_index, int ref_index, 191 int size, int h); 192}MotionEstContext; 193 194/** 195 * MpegEncContext. 196 */ 197typedef struct MpegEncContext { 198 struct AVCodecContext *avctx; 199 /* the following parameters must be initialized before encoding */ 200 int width, height;///< picture size. must be a multiple of 16 201 int gop_size; 202 int intra_only; ///< if true, only intra pictures are generated 203 int bit_rate; ///< wanted bit rate 204 enum OutputFormat out_format; ///< output format 205 int h263_pred; ///< use mpeg4/h263 ac/dc predictions 206 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved) 207 208/* the following codec id fields are deprecated in favor of codec_id */ 209 int h263_plus; ///< h263 plus headers 210 int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead) 211 int h263_flv; ///< use flv h263 header 212 213 enum CodecID codec_id; /* see CODEC_ID_xxx */ 214 int fixed_qscale; ///< fixed qscale if non zero 215 int encoding; ///< true if we are encoding (vs decoding) 216 int flags; ///< AVCodecContext.flags (HQ, MV4, ...) 217 int flags2; ///< AVCodecContext.flags2 218 int max_b_frames; ///< max number of b-frames for encoding 219 int luma_elim_threshold; 220 int chroma_elim_threshold; 221 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...) 222 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically 223 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag 224 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag 225 /* the following fields are managed internally by the encoder */ 226 227 /** bit output */ 228 PutBitContext pb; 229 230 /* sequence parameters */ 231 int context_initialized; 232 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else 233 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else 234 int picture_number; //FIXME remove, unclear definition 235 int picture_in_gop_number; ///< 0-> first pic in gop, ... 236 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input 237 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video() 238 int mb_width, mb_height; ///< number of MBs horizontally & vertically 239 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 240 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing 241 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing 242 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication) 243 int mb_num; ///< number of MBs of a picture 244 int linesize; ///< line size, in bytes, may be different from width 245 int uvlinesize; ///< line size, for chroma in bytes, may be different from width 246 Picture *picture; ///< main picture buffer 247 Picture **input_picture; ///< next pictures on display order for encoding 248 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding 249 250 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) 251 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) 252 struct MpegEncContext *thread_context[MAX_THREADS]; 253 254 /** 255 * copy of the previous picture structure. 256 * note, linesize & data, might not match the previous picture (for field pictures) 257 */ 258 Picture last_picture; 259 260 /** 261 * copy of the next picture structure. 262 * note, linesize & data, might not match the next picture (for field pictures) 263 */ 264 Picture next_picture; 265 266 /** 267 * copy of the source picture structure for encoding. 268 * note, linesize & data, might not match the source picture (for field pictures) 269 */ 270 Picture new_picture; 271 272 /** 273 * copy of the current picture structure. 274 * note, linesize & data, might not match the current picture (for field pictures) 275 */ 276 Picture current_picture; ///< buffer to store the decompressed current picture 277 278 Picture *last_picture_ptr; ///< pointer to the previous picture. 279 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred) 280 Picture *current_picture_ptr; ///< pointer to the current picture 281 uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization 282 int last_dc[3]; ///< last DC values for MPEG1 283 int16_t *dc_val_base; 284 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous 285 int16_t dc_cache[4*5]; 286 int y_dc_scale, c_dc_scale; 287 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table 288 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table 289 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263) 290 uint8_t *coded_block_base; 291 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1) 292 int16_t (*ac_val_base)[16]; 293 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous 294 int ac_pred; 295 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip 296#define PREV_PICT_TYPES_BUFFER_SIZE 256 297 int mb_skipped; ///< MUST BE SET only during DECODING 298 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example) 299 and used for b-frame encoding & decoding (contains skip table of next P Frame) */ 300 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding 301 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding 302 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding 303 uint8_t *allocated_edge_emu_buffer; 304 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer 305 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision 306 uint8_t *obmc_scratchpad; 307 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers 308 309 int qscale; ///< QP 310 int chroma_qscale; ///< chroma QP 311 unsigned int lambda; ///< lagrange multipler used in rate distortion 312 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT 313 int *lambda_table; 314 int adaptive_quant; ///< use adaptive quantization 315 int dquant; ///< qscale difference to prev qscale 316 int closed_gop; ///< MPEG1/2 GOP is closed 317 int pict_type; ///< FF_I_TYPE, FF_P_TYPE, FF_B_TYPE, ... 318 int last_pict_type; //FIXME removes 319 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol 320 int dropable; 321 int frame_rate_index; 322 int last_lambda_for[5]; ///< last lambda for a specific pict type 323 int skipdct; ///< skip dct and code zero residual 324 325 /* motion compensation */ 326 int unrestricted_mv; ///< mv can point outside of the coded picture 327 int h263_long_vectors; ///< use horrible h263v1 long vector mode 328 int decode; ///< if 0 then decoding will be skipped (for encoding b frames for example) 329 330 DSPContext dsp; ///< pointers for accelerated dsp functions 331 int f_code; ///< forward MV resolution 332 int b_code; ///< backward MV resolution for B Frames (mpeg4) 333 int16_t (*p_mv_table_base)[2]; 334 int16_t (*b_forw_mv_table_base)[2]; 335 int16_t (*b_back_mv_table_base)[2]; 336 int16_t (*b_bidir_forw_mv_table_base)[2]; 337 int16_t (*b_bidir_back_mv_table_base)[2]; 338 int16_t (*b_direct_mv_table_base)[2]; 339 int16_t (*p_field_mv_table_base[2][2])[2]; 340 int16_t (*b_field_mv_table_base[2][2][2])[2]; 341 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding 342 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding 343 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding 344 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 345 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 346 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding 347 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding 348 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding 349 uint8_t (*p_field_select_table[2]); 350 uint8_t (*b_field_select_table[2][2]); 351 int me_method; ///< ME algorithm 352 int mv_dir; 353#define MV_DIR_FORWARD 1 354#define MV_DIR_BACKWARD 2 355#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4) 356 int mv_type; 357#define MV_TYPE_16X16 0 ///< 1 vector for the whole mb 358#define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV) 359#define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block 360#define MV_TYPE_FIELD 3 ///< 2 vectors, one per field 361#define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors 362 /**motion vectors for a macroblock 363 first coordinate : 0 = forward 1 = backward 364 second " : depend on type 365 third " : 0 = x, 1 = y 366 */ 367 int mv[2][4][2]; 368 int field_select[2][2]; 369 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4 370 uint8_t *fcode_tab; ///< smallest fcode needed for each MV 371 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv 372 373 MotionEstContext me; 374 375 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...) 376 for b-frames rounding mode is always 0 */ 377 378 int hurry_up; /**< when set to 1 during decoding, b frames will be skipped 379 when set to 2 idct/dequant will be skipped too */ 380 381 /* macroblock layer */ 382 int mb_x, mb_y; 383 int mb_skip_run; 384 int mb_intra; 385 uint16_t *mb_type; ///< Table for candidate MB types for encoding 386#define CANDIDATE_MB_TYPE_INTRA 0x01 387#define CANDIDATE_MB_TYPE_INTER 0x02 388#define CANDIDATE_MB_TYPE_INTER4V 0x04 389#define CANDIDATE_MB_TYPE_SKIPPED 0x08 390//#define MB_TYPE_GMC 0x10 391 392#define CANDIDATE_MB_TYPE_DIRECT 0x10 393#define CANDIDATE_MB_TYPE_FORWARD 0x20 394#define CANDIDATE_MB_TYPE_BACKWARD 0x40 395#define CANDIDATE_MB_TYPE_BIDIR 0x80 396 397#define CANDIDATE_MB_TYPE_INTER_I 0x100 398#define CANDIDATE_MB_TYPE_FORWARD_I 0x200 399#define CANDIDATE_MB_TYPE_BACKWARD_I 0x400 400#define CANDIDATE_MB_TYPE_BIDIR_I 0x800 401 402#define CANDIDATE_MB_TYPE_DIRECT0 0x1000 403 404 int block_index[6]; ///< index to current MB in block based arrays with edges 405 int block_wrap[6]; 406 uint8_t *dest[3]; 407 408 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride 409 410 /** matrix transmitted in the bitstream */ 411 uint16_t intra_matrix[64]; 412 uint16_t chroma_intra_matrix[64]; 413 uint16_t inter_matrix[64]; 414 uint16_t chroma_inter_matrix[64]; 415#define QUANT_BIAS_SHIFT 8 416 int intra_quant_bias; ///< bias for the quantizer 417 int inter_quant_bias; ///< bias for the quantizer 418 int min_qcoeff; ///< minimum encodable coefficient 419 int max_qcoeff; ///< maximum encodable coefficient 420 int ac_esc_length; ///< num of bits needed to encode the longest esc 421 uint8_t *intra_ac_vlc_length; 422 uint8_t *intra_ac_vlc_last_length; 423 uint8_t *inter_ac_vlc_length; 424 uint8_t *inter_ac_vlc_last_length; 425 uint8_t *luma_dc_vlc_length; 426 uint8_t *chroma_dc_vlc_length; 427#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level)) 428 429 int coded_score[8]; 430 431 /** precomputed matrix (combine qscale and DCT renorm) */ 432 int (*q_intra_matrix)[64]; 433 int (*q_inter_matrix)[64]; 434 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/ 435 uint16_t (*q_intra_matrix16)[2][64]; 436 uint16_t (*q_inter_matrix16)[2][64]; 437 int block_last_index[12]; ///< last non zero coefficient in block 438 /* scantables */ 439 ScanTable intra_scantable; 440 ScanTable intra_h_scantable; 441 ScanTable intra_v_scantable; 442 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage 443 444 /* noise reduction */ 445 int (*dct_error_sum)[64]; 446 int dct_count[2]; 447 uint16_t (*dct_offset)[64]; 448 449 void *opaque; ///< private data for the user 450 451 /* bit rate control */ 452 int64_t wanted_bits; 453 int64_t total_bits; 454 int frame_bits; ///< bits used for the current frame 455 int next_lambda; ///< next lambda used for retrying to encode a frame 456 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c 457 458 /* statistics, used for 2-pass encoding */ 459 int mv_bits; 460 int header_bits; 461 int i_tex_bits; 462 int p_tex_bits; 463 int i_count; 464 int f_count; 465 int b_count; 466 int skip_count; 467 int misc_bits; ///< cbp, mb_type 468 int last_bits; ///< temp var used for calculating the above vars 469 470 /* error concealment / resync */ 471 int error_count; 472 uint8_t *error_status_table; ///< table of the error status of each MB 473#define VP_START 1 ///< current MB is the first after a resync marker 474#define AC_ERROR 2 475#define DC_ERROR 4 476#define MV_ERROR 8 477#define AC_END 16 478#define DC_END 32 479#define MV_END 64 480//FIXME some prefix? 481 482 int resync_mb_x; ///< x position of last resync marker 483 int resync_mb_y; ///< y position of last resync marker 484 GetBitContext last_resync_gb; ///< used to search for the next resync marker 485 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only) 486 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames 487 int error_recognition; 488 489 ParseContext parse_context; 490 491 /* H.263 specific */ 492 int gob_index; 493 int obmc; ///< overlapped block motion compensation 494 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames 495 496 /* H.263+ specific */ 497 int umvplus; ///< == H263+ && unrestricted_mv 498 int h263_aic; ///< Advanded INTRA Coding (AIC) 499 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top 500 int h263_slice_structured; 501 int alt_inter_vlc; ///< alternative inter vlc 502 int modified_quant; 503 int loop_filter; 504 int custom_pcf; 505 506 /* mpeg4 specific */ 507 int time_increment_bits; ///< number of bits to represent the fractional part of time 508 int last_time_base; 509 int time_base; ///< time in seconds of last I,P,S Frame 510 int64_t time; ///< time of current frame 511 int64_t last_non_b_time; 512 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames 513 uint16_t pb_time; ///< time distance between the last b and p,s,i frame 514 uint16_t pp_field_time; 515 uint16_t pb_field_time; ///< like above, just for interlaced 516 int shape; 517 int vol_sprite_usage; 518 int sprite_width; 519 int sprite_height; 520 int sprite_left; 521 int sprite_top; 522 int sprite_brightness_change; 523 int num_sprite_warping_points; 524 int real_sprite_warping_points; 525 uint16_t sprite_traj[4][2]; ///< sprite trajectory points 526 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY] 527 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY] 528 int sprite_shift[2]; ///< sprite shift [isChroma] 529 int mcsel; 530 int quant_precision; 531 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC 532 int scalability; 533 int hierachy_type; 534 int enhancement_type; 535 int new_pred; 536 int reduced_res_vop; 537 int aspect_ratio_info; //FIXME remove 538 int sprite_warping_accuracy; 539 int low_latency_sprite; 540 int data_partitioning; ///< data partitioning flag from header 541 int partitioned_frame; ///< is current frame partitioned 542 int rvlc; ///< reversible vlc 543 int resync_marker; ///< could this stream contain resync markers 544 int low_delay; ///< no reordering needed / has no b-frames 545 int vo_type; 546 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders 547 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc 548 int use_intra_dc_vlc; 549 PutBitContext tex_pb; ///< used for data partitioned VOPs 550 PutBitContext pb2; ///< used for data partitioned VOPs 551 int mpeg_quant; 552 int t_frame; ///< time distance of first I -> B, used for interlaced b frames 553 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4 554 int cplx_estimation_trash_i; 555 int cplx_estimation_trash_p; 556 int cplx_estimation_trash_b; 557 558 /* divx specific, used to workaround (many) bugs in divx5 */ 559 int divx_version; 560 int divx_build; 561 int divx_packed; 562 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them 563 int bitstream_buffer_size; 564 unsigned int allocated_bitstream_buffer_size; 565 566 int xvid_build; 567 568 /* lavc specific stuff, used to workaround bugs in libavcodec */ 569 int lavc_build; 570 571 /* RV10 specific */ 572 int rv10_version; ///< RV10 version: 0 or 3 573 int rv10_first_dc_coded[3]; 574 int orig_width, orig_height; 575 576 /* MJPEG specific */ 577 struct MJpegContext *mjpeg_ctx; 578 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1} 579 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1} 580 581 /* MSMPEG4 specific */ 582 int mv_table_index; 583 int rl_table_index; 584 int rl_chroma_table_index; 585 int dc_table_index; 586 int use_skip_mb_code; 587 int slice_height; ///< in macroblocks 588 int first_slice_line; ///< used in mpeg4 too to handle resync markers 589 int flipflop_rounding; 590 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8 591 int per_mb_rl_table; 592 int esc3_level_length; 593 int esc3_run_length; 594 /** [mb_intra][isChroma][level][run][last] */ 595 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2]; 596 int inter_intra_pred; 597 int mspel; 598 599 /* decompression specific */ 600 GetBitContext gb; 601 602 /* Mpeg1 specific */ 603 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific 604 int last_mv_dir; ///< last mv_dir, used for b frame encoding 605 int broken_link; ///< no_output_of_prior_pics_flag 606 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream 607 608 /* MPEG-2-specific - I wished not to have to support this mess. */ 609 int progressive_sequence; 610 int mpeg_f_code[2][2]; 611 int picture_structure; 612/* picture type */ 613#define PICT_TOP_FIELD 1 614#define PICT_BOTTOM_FIELD 2 615#define PICT_FRAME 3 616 617 int intra_dc_precision; 618 int frame_pred_frame_dct; 619 int top_field_first; 620 int concealment_motion_vectors; 621 int q_scale_type; 622 int intra_vlc_format; 623 int alternate_scan; 624 int repeat_first_field; 625 int chroma_420_type; 626 int chroma_format; 627#define CHROMA_420 1 628#define CHROMA_422 2 629#define CHROMA_444 3 630 int chroma_x_shift;//depend on pix_format, that depend on chroma_format 631 int chroma_y_shift; 632 633 int progressive_frame; 634 int full_pel[2]; 635 int interlaced_dct; 636 int first_slice; 637 int first_field; ///< is 1 for the first field of a field picture 0 otherwise 638 639 /* RTP specific */ 640 int rtp_mode; 641 642 uint8_t *ptr_lastgob; 643 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped 644 DCTELEM (*pblocks[12])[64]; 645 646 DCTELEM (*block)[64]; ///< points to one of the following blocks 647 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block 648 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch() 649#define SLICE_OK 0 650#define SLICE_ERROR -1 651#define SLICE_END -2 ///<end marker found 652#define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded 653 654 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s, 655 DCTELEM *block/*align 16*/, int n, int qscale); 656 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s, 657 DCTELEM *block/*align 16*/, int n, int qscale); 658 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s, 659 DCTELEM *block/*align 16*/, int n, int qscale); 660 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s, 661 DCTELEM *block/*align 16*/, int n, int qscale); 662 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s, 663 DCTELEM *block/*align 16*/, int n, int qscale); 664 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s, 665 DCTELEM *block/*align 16*/, int n, int qscale); 666 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s, 667 DCTELEM *block/*align 16*/, int n, int qscale); 668 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s, 669 DCTELEM *block/*align 16*/, int n, int qscale); 670 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both) 671 DCTELEM *block/*align 16*/, int n, int qscale); 672 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both) 673 DCTELEM *block/*align 16*/, int n, int qscale); 674 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow); 675 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow); 676 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block); 677} MpegEncContext; 678 679 680void MPV_decode_defaults(MpegEncContext *s); 681int MPV_common_init(MpegEncContext *s); 682void MPV_common_end(MpegEncContext *s); 683void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]); 684int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx); 685void MPV_frame_end(MpegEncContext *s); 686int MPV_encode_init(AVCodecContext *avctx); 687int MPV_encode_end(AVCodecContext *avctx); 688int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data); 689void MPV_common_init_mmx(MpegEncContext *s); 690void MPV_common_init_axp(MpegEncContext *s); 691void MPV_common_init_mlib(MpegEncContext *s); 692void MPV_common_init_mmi(MpegEncContext *s); 693void MPV_common_init_arm(MpegEncContext *s); 694void MPV_common_init_altivec(MpegEncContext *s); 695void MPV_common_init_bfin(MpegEncContext *s); 696void ff_clean_intra_table_entries(MpegEncContext *s); 697void ff_draw_horiz_band(MpegEncContext *s, int y, int h); 698void ff_mpeg_flush(AVCodecContext *avctx); 699void ff_print_debug_info(MpegEncContext *s, AVFrame *pict); 700void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix); 701int ff_find_unused_picture(MpegEncContext *s, int shared); 702void ff_denoise_dct(MpegEncContext *s, DCTELEM *block); 703void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src); 704const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state); 705void ff_set_qscale(MpegEncContext * s, int qscale); 706 707void ff_er_frame_start(MpegEncContext *s); 708void ff_er_frame_end(MpegEncContext *s); 709void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status); 710 711int ff_dct_common_init(MpegEncContext *s); 712void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64], 713 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra); 714 715void ff_init_block_index(MpegEncContext *s); 716void ff_copy_picture(Picture *dst, Picture *src); 717 718/** 719 * allocates a Picture 720 * The pixels are allocated/set by calling get_buffer() if shared=0 721 */ 722int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared); 723 724extern const enum PixelFormat ff_pixfmt_list_420[]; 725extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[]; 726 727static inline void ff_update_block_index(MpegEncContext *s){ 728 const int block_size= 8>>s->avctx->lowres; 729 730 s->block_index[0]+=2; 731 s->block_index[1]+=2; 732 s->block_index[2]+=2; 733 s->block_index[3]+=2; 734 s->block_index[4]++; 735 s->block_index[5]++; 736 s->dest[0]+= 2*block_size; 737 s->dest[1]+= block_size; 738 s->dest[2]+= block_size; 739} 740 741static inline int get_bits_diff(MpegEncContext *s){ 742 const int bits= put_bits_count(&s->pb); 743 const int last= s->last_bits; 744 745 s->last_bits = bits; 746 747 return bits - last; 748} 749 750static inline int ff_h263_round_chroma(int x){ 751 static const uint8_t h263_chroma_roundtab[16] = { 752 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 753 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 754 }; 755 return h263_chroma_roundtab[x & 0xf] + (x >> 3); 756} 757 758/* motion_est.c */ 759void ff_estimate_p_frame_motion(MpegEncContext * s, 760 int mb_x, int mb_y); 761void ff_estimate_b_frame_motion(MpegEncContext * s, 762 int mb_x, int mb_y); 763int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type); 764void ff_fix_long_p_mvs(MpegEncContext * s); 765void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select, 766 int16_t (*mv_table)[2], int f_code, int type, int truncate); 767int ff_init_me(MpegEncContext *s); 768int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y); 769int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr, 770 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2], 771 int ref_mv_scale, int size, int h); 772int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index, 773 int ref_index, int size, int h, int add_rate); 774 775/* mpeg12.c */ 776extern const uint8_t ff_mpeg1_dc_scale_table[128]; 777extern const uint8_t * const ff_mpeg2_dc_scale_table[4]; 778 779void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number); 780void mpeg1_encode_mb(MpegEncContext *s, 781 DCTELEM block[6][64], 782 int motion_x, int motion_y); 783void ff_mpeg1_encode_init(MpegEncContext *s); 784void ff_mpeg1_encode_slice_header(MpegEncContext *s); 785void ff_mpeg1_clean_buffers(MpegEncContext *s); 786int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); 787 788extern const uint8_t ff_aic_dc_scale_table[32]; 789extern const uint8_t ff_h263_chroma_qscale_table[32]; 790extern const uint8_t ff_h263_loop_filter_strength[32]; 791 792/* h261.c */ 793void ff_h261_loop_filter(MpegEncContext *s); 794void ff_h261_reorder_mb_index(MpegEncContext* s); 795void ff_h261_encode_mb(MpegEncContext *s, 796 DCTELEM block[6][64], 797 int motion_x, int motion_y); 798void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number); 799void ff_h261_encode_init(MpegEncContext *s); 800int ff_h261_get_picture_format(int width, int height); 801 802 803/* rv10.c */ 804void rv10_encode_picture_header(MpegEncContext *s, int picture_number); 805int rv_decode_dc(MpegEncContext *s, int n); 806void rv20_encode_picture_header(MpegEncContext *s, int picture_number); 807 808 809/* msmpeg4.c */ 810void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number); 811void msmpeg4_encode_ext_header(MpegEncContext * s); 812void msmpeg4_encode_mb(MpegEncContext * s, 813 DCTELEM block[6][64], 814 int motion_x, int motion_y); 815int msmpeg4_decode_picture_header(MpegEncContext * s); 816int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size); 817int ff_msmpeg4_decode_init(AVCodecContext *avctx); 818void ff_msmpeg4_encode_init(MpegEncContext *s); 819int ff_wmv2_decode_picture_header(MpegEncContext * s); 820int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s); 821void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr); 822void ff_mspel_motion(MpegEncContext *s, 823 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, 824 uint8_t **ref_picture, op_pixels_func (*pix_op)[4], 825 int motion_x, int motion_y, int h); 826int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number); 827void ff_wmv2_encode_mb(MpegEncContext * s, 828 DCTELEM block[6][64], 829 int motion_x, int motion_y); 830 831#endif /* AVCODEC_MPEGVIDEO_H */ 832 833