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 "avcodec.h" 32#include "blockdsp.h" 33#include "error_resilience.h" 34#include "fdctdsp.h" 35#include "get_bits.h" 36#include "h264chroma.h" 37#include "h263dsp.h" 38#include "hpeldsp.h" 39#include "idctdsp.h" 40#include "me_cmp.h" 41#include "motion_est.h" 42#include "mpegpicture.h" 43#include "mpegvideodsp.h" 44#include "mpegvideoencdsp.h" 45#include "pixblockdsp.h" 46#include "put_bits.h" 47#include "ratecontrol.h" 48#if FF_API_FLAG_TRUNCATED 49#include "parser.h" 50#endif 51#include "mpegutils.h" 52#include "qpeldsp.h" 53#include "videodsp.h" 54 55#define MAX_THREADS 32 56 57#define MAX_B_FRAMES 16 58 59/** 60 * MpegEncContext. 61 */ 62typedef struct MpegEncContext { 63 AVClass *class; 64 65 int y_dc_scale, c_dc_scale; 66 int ac_pred; 67 int block_last_index[12]; ///< last non zero coefficient in block 68 int h263_aic; ///< Advanced INTRA Coding (AIC) 69 70 /* scantables */ 71 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage 72 ScanTable intra_scantable; 73 ScanTable intra_h_scantable; 74 ScanTable intra_v_scantable; 75 76 /* WARNING: changes above this line require updates to hardcoded 77 * offsets used in ASM. */ 78 79 struct AVCodecContext *avctx; 80 /* The following pointer is intended for codecs sharing code 81 * between decoder and encoder and in need of a common context to do so. */ 82 void *private_ctx; 83 /* the following parameters must be initialized before encoding */ 84 int width, height;///< picture size. must be a multiple of 16 85 int gop_size; 86 int intra_only; ///< if true, only intra pictures are generated 87 int64_t bit_rate; ///< wanted bit rate 88 enum OutputFormat out_format; ///< output format 89 int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions 90 int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved) 91 92/* the following codec id fields are deprecated in favor of codec_id */ 93 int h263_plus; ///< H.263+ headers 94 int h263_flv; ///< use flv H.263 header 95 96 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ 97 int fixed_qscale; ///< fixed qscale if non zero 98 int encoding; ///< true if we are encoding (vs decoding) 99 int max_b_frames; ///< max number of B-frames for encoding 100 int luma_elim_threshold; 101 int chroma_elim_threshold; 102 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically 103 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag 104 /* the following fields are managed internally by the encoder */ 105 106 /* sequence parameters */ 107 int context_initialized; 108 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else 109 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else 110 int picture_number; //FIXME remove, unclear definition 111 int picture_in_gop_number; ///< 0-> first pic in gop, ... 112 int mb_width, mb_height; ///< number of MBs horizontally & vertically 113 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 114 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing 115 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication) 116 int mb_num; ///< number of MBs of a picture 117 ptrdiff_t linesize; ///< line size, in bytes, may be different from width 118 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width 119 Picture *picture; ///< main picture buffer 120 Picture **input_picture; ///< next pictures on display order for encoding 121 Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding 122 123 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_send_frame() 124 /** 125 * pts difference between the first and second input frame, used for 126 * calculating dts of the first frame when there's a delay */ 127 int64_t dts_delta; 128 /** 129 * reordered pts to be used as dts for the next output frame when there's 130 * a delay */ 131 int64_t reordered_pts; 132 133 /** bit output */ 134 PutBitContext pb; 135 136 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) 137 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) 138 struct MpegEncContext *thread_context[MAX_THREADS]; 139 int slice_context_count; ///< number of used thread_contexts 140 141 /** 142 * copy of the previous picture structure. 143 * note, linesize & data, might not match the previous picture (for field pictures) 144 */ 145 Picture last_picture; 146 147 /** 148 * copy of the next picture structure. 149 * note, linesize & data, might not match the next picture (for field pictures) 150 */ 151 Picture next_picture; 152 153 /** 154 * Reference to the source picture for encoding. 155 * note, linesize & data, might not match the source picture (for field pictures) 156 */ 157 AVFrame *new_picture; 158 159 /** 160 * copy of the current picture structure. 161 * note, linesize & data, might not match the current picture (for field pictures) 162 */ 163 Picture current_picture; ///< buffer to store the decompressed current picture 164 165 Picture *last_picture_ptr; ///< pointer to the previous picture. 166 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred) 167 Picture *current_picture_ptr; ///< pointer to the current picture 168 int last_dc[3]; ///< last DC values for MPEG-1 169 int16_t *dc_val_base; 170 int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous 171 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table 172 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table 173 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263) 174 uint8_t *coded_block_base; 175 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1) 176 int16_t (*ac_val_base)[16]; 177 int16_t (*ac_val[3])[16]; ///< used for MPEG-4 AC prediction, all 3 arrays must be continuous 178 int mb_skipped; ///< MUST BE SET only during DECODING 179 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example) 180 and used for B-frame encoding & decoding (contains skip table of next P-frame) */ 181 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding 182 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding 183 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding 184 185 ScratchpadContext sc; 186 187 int qscale; ///< QP 188 int chroma_qscale; ///< chroma QP 189 unsigned int lambda; ///< Lagrange multiplier used in rate distortion 190 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT 191 int *lambda_table; 192 int adaptive_quant; ///< use adaptive quantization 193 int dquant; ///< qscale difference to prev qscale 194 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ... 195 int vbv_delay; 196 int last_pict_type; //FIXME removes 197 int last_non_b_pict_type; ///< used for MPEG-4 gmc B-frames & ratecontrol 198 int droppable; 199 int last_lambda_for[5]; ///< last lambda for a specific pict type 200 int skipdct; ///< skip dct and code zero residual 201 202 /* motion compensation */ 203 int unrestricted_mv; ///< mv can point outside of the coded picture 204 int h263_long_vectors; ///< use horrible H.263v1 long vector mode 205 206 BlockDSPContext bdsp; 207 FDCTDSPContext fdsp; 208 H264ChromaContext h264chroma; 209 HpelDSPContext hdsp; 210 IDCTDSPContext idsp; 211 MECmpContext mecc; 212 MpegVideoDSPContext mdsp; 213 MpegvideoEncDSPContext mpvencdsp; 214 PixblockDSPContext pdsp; 215 QpelDSPContext qdsp; 216 VideoDSPContext vdsp; 217 H263DSPContext h263dsp; 218 int f_code; ///< forward MV resolution 219 int b_code; ///< backward MV resolution for B-frames (MPEG-4) 220 int16_t (*p_mv_table_base)[2]; 221 int16_t (*b_forw_mv_table_base)[2]; 222 int16_t (*b_back_mv_table_base)[2]; 223 int16_t (*b_bidir_forw_mv_table_base)[2]; 224 int16_t (*b_bidir_back_mv_table_base)[2]; 225 int16_t (*b_direct_mv_table_base)[2]; 226 int16_t (*p_field_mv_table_base)[2]; 227 int16_t (*b_field_mv_table_base)[2]; 228 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) P-frame encoding 229 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode B-frame encoding 230 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode B-frame encoding 231 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding 232 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding 233 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode B-frame encoding 234 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding 235 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding 236 uint8_t (*p_field_select_table[2]); ///< Only the first element is allocated 237 uint8_t (*b_field_select_table[2][2]); ///< Only the first element is allocated 238 int motion_est; ///< ME algorithm 239 int me_penalty_compensation; 240 int me_pre; ///< prepass for motion estimation 241 int mv_dir; 242#define MV_DIR_FORWARD 1 243#define MV_DIR_BACKWARD 2 244#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4) 245 int mv_type; 246#define MV_TYPE_16X16 0 ///< 1 vector for the whole mb 247#define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV) 248#define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block 249#define MV_TYPE_FIELD 3 ///< 2 vectors, one per field 250#define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors 251 /**motion vectors for a macroblock 252 first coordinate : 0 = forward 1 = backward 253 second " : depend on type 254 third " : 0 = x, 1 = y 255 */ 256 int mv[2][4][2]; 257 int field_select[2][2]; 258 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4 259 const uint8_t *fcode_tab; ///< smallest fcode needed for each MV 260 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv 261 262 MotionEstContext me; 263 264 int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) 265 for B-frames rounding mode is always 0 */ 266 267 /* macroblock layer */ 268 int mb_x, mb_y; 269 int mb_skip_run; 270 int mb_intra; 271 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h) 272 273 int block_index[6]; ///< index to current MB in block based arrays with edges 274 int block_wrap[6]; 275 uint8_t *dest[3]; 276 277 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride 278 279 /** matrix transmitted in the bitstream */ 280 uint16_t intra_matrix[64]; 281 uint16_t chroma_intra_matrix[64]; 282 uint16_t inter_matrix[64]; 283 uint16_t chroma_inter_matrix[64]; 284 285 int intra_quant_bias; ///< bias for the quantizer 286 int inter_quant_bias; ///< bias for the quantizer 287 int min_qcoeff; ///< minimum encodable coefficient 288 int max_qcoeff; ///< maximum encodable coefficient 289 int ac_esc_length; ///< num of bits needed to encode the longest esc 290 uint8_t *intra_ac_vlc_length; 291 uint8_t *intra_ac_vlc_last_length; 292 uint8_t *intra_chroma_ac_vlc_length; 293 uint8_t *intra_chroma_ac_vlc_last_length; 294 uint8_t *inter_ac_vlc_length; 295 uint8_t *inter_ac_vlc_last_length; 296 uint8_t *luma_dc_vlc_length; 297 298 int coded_score[12]; 299 300 /** precomputed matrix (combine qscale and DCT renorm) */ 301 int (*q_intra_matrix)[64]; 302 int (*q_chroma_intra_matrix)[64]; 303 int (*q_inter_matrix)[64]; 304 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/ 305 uint16_t (*q_intra_matrix16)[2][64]; 306 uint16_t (*q_chroma_intra_matrix16)[2][64]; 307 uint16_t (*q_inter_matrix16)[2][64]; 308 309 /* noise reduction */ 310 int (*dct_error_sum)[64]; 311 int dct_count[2]; 312 uint16_t (*dct_offset)[64]; 313 314 /* bit rate control */ 315 int64_t total_bits; 316 int frame_bits; ///< bits used for the current frame 317 int stuffing_bits; ///< bits used for stuffing 318 int next_lambda; ///< next lambda used for retrying to encode a frame 319 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c 320 321 /* statistics, used for 2-pass encoding */ 322 int mv_bits; 323 int header_bits; 324 int i_tex_bits; 325 int p_tex_bits; 326 int i_count; 327 int skip_count; 328 int misc_bits; ///< cbp, mb_type 329 int last_bits; ///< temp var used for calculating the above vars 330 331 /* error concealment / resync */ 332 int resync_mb_x; ///< x position of last resync marker 333 int resync_mb_y; ///< y position of last resync marker 334 GetBitContext last_resync_gb; ///< used to search for the next resync marker 335 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only) 336 337#if FF_API_FLAG_TRUNCATED 338 ParseContext parse_context; 339#endif 340 341 /* H.263 specific */ 342 int gob_index; 343 int obmc; ///< overlapped block motion compensation 344 int mb_info; ///< interval for outputting info about mb offsets as side data 345 int prev_mb_info, last_mb_info; 346 uint8_t *mb_info_ptr; 347 int mb_info_size; 348 int ehc_mode; 349 350 /* H.263+ specific */ 351 int umvplus; ///< == H.263+ && unrestricted_mv 352 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top 353 int h263_slice_structured; 354 int alt_inter_vlc; ///< alternative inter vlc 355 int modified_quant; 356 int loop_filter; 357 int custom_pcf; 358 359 /* MPEG-4 specific */ 360 int studio_profile; 361 int dct_precision; 362 ///< number of bits to represent the fractional part of time (encoder only) 363 int time_increment_bits; 364 int last_time_base; 365 int time_base; ///< time in seconds of last I,P,S Frame 366 int64_t time; ///< time of current frame 367 int64_t last_non_b_time; 368 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames 369 uint16_t pb_time; ///< time distance between the last b and p,s,i frame 370 uint16_t pp_field_time; 371 uint16_t pb_field_time; ///< like above, just for interlaced 372 int real_sprite_warping_points; 373 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY] 374 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY] 375 int mcsel; 376 int quant_precision; 377 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC 378 int sprite_warping_accuracy; 379 int data_partitioning; ///< data partitioning flag from header 380 int partitioned_frame; ///< is current frame partitioned 381 int low_delay; ///< no reordering needed / has no B-frames 382 PutBitContext tex_pb; ///< used for data partitioned VOPs 383 PutBitContext pb2; ///< used for data partitioned VOPs 384 int mpeg_quant; 385 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG-4 386 387 /* divx specific, used to workaround (many) bugs in divx5 */ 388 int divx_packed; 389 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them 390 int bitstream_buffer_size; 391 unsigned int allocated_bitstream_buffer_size; 392 393 /* RV10 specific */ 394 int rv10_version; ///< RV10 version: 0 or 3 395 int rv10_first_dc_coded[3]; 396 397 /* MJPEG specific */ 398 struct MJpegContext *mjpeg_ctx; 399 int esc_pos; 400 401 /* MSMPEG4 specific */ 402 int mv_table_index; 403 int rl_table_index; 404 int rl_chroma_table_index; 405 int dc_table_index; 406 int use_skip_mb_code; 407 int slice_height; ///< in macroblocks 408 int first_slice_line; ///< used in MPEG-4 too to handle resync markers 409 int flipflop_rounding; 410 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8 411 int per_mb_rl_table; 412 int esc3_level_length; 413 int esc3_run_length; 414 int inter_intra_pred; 415 int mspel; 416 417 /* decompression specific */ 418 GetBitContext gb; 419 420 /* MPEG-1 specific */ 421 int last_mv_dir; ///< last mv_dir, used for B-frame encoding 422 int vbv_delay_pos; ///< offset of vbv_delay in the bitstream 423 424 /* MPEG-2-specific - I wished not to have to support this mess. */ 425 int progressive_sequence; 426 int mpeg_f_code[2][2]; 427 428 // picture structure defines are loaded from mpegutils.h 429 int picture_structure; 430 431 int intra_dc_precision; 432 int frame_pred_frame_dct; 433 int top_field_first; 434 int concealment_motion_vectors; 435 int q_scale_type; 436 int brd_scale; 437 int intra_vlc_format; 438 int alternate_scan; 439#define VIDEO_FORMAT_COMPONENT 0 440#define VIDEO_FORMAT_PAL 1 441#define VIDEO_FORMAT_NTSC 2 442#define VIDEO_FORMAT_SECAM 3 443#define VIDEO_FORMAT_MAC 4 444#define VIDEO_FORMAT_UNSPECIFIED 5 445 int repeat_first_field; 446 int chroma_420_type; 447 int chroma_format; 448#define CHROMA_420 1 449#define CHROMA_422 2 450#define CHROMA_444 3 451 int chroma_x_shift;//depend on pix_format, that depend on chroma_format 452 int chroma_y_shift; 453 454 int progressive_frame; 455 int full_pel[2]; 456 int interlaced_dct; 457 int first_field; ///< is 1 for the first field of a field picture 0 otherwise 458 459 /* RTP specific */ 460 int rtp_mode; 461 int rtp_payload_size; 462 463 uint8_t *ptr_lastgob; 464 int16_t (*pblocks[12])[64]; 465 466 int16_t (*block)[64]; ///< points to one of the following blocks 467 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block 468 int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch() 469 470#define SLICE_OK 0 471#define SLICE_ERROR -1 472#define SLICE_END -2 ///<end marker found 473#define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded 474 475 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s, 476 int16_t *block/*align 16*/, int n, int qscale); 477 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s, 478 int16_t *block/*align 16*/, int n, int qscale); 479 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s, 480 int16_t *block/*align 16*/, int n, int qscale); 481 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s, 482 int16_t *block/*align 16*/, int n, int qscale); 483 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s, 484 int16_t *block/*align 16*/, int n, int qscale); 485 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s, 486 int16_t *block/*align 16*/, int n, int qscale); 487 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) 488 int16_t *block/*align 16*/, int n, int qscale); 489 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) 490 int16_t *block/*align 16*/, int n, int qscale); 491 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow); 492 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow); 493 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block); 494 495 int mpv_flags; ///< flags set by private options 496 int quantizer_noise_shaping; 497 498 /** 499 * ratecontrol qmin qmax limiting method 500 * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax. 501 */ 502 float rc_qsquish; 503 float rc_qmod_amp; 504 int rc_qmod_freq; 505 float rc_initial_cplx; 506 float rc_buffer_aggressivity; 507 float border_masking; 508 int lmin, lmax; 509 int vbv_ignore_qmax; 510 511 char *rc_eq; 512 513 /* temp buffers for rate control */ 514 float *cplx_tab, *bits_tab; 515 516 /* flag to indicate a reinitialization is required, e.g. after 517 * a frame size change */ 518 int context_reinit; 519 520 ERContext er; 521 522 int error_rate; 523 524 /* temporary frames used by b_frame_strategy = 2 */ 525 AVFrame *tmp_frames[MAX_B_FRAMES + 2]; 526 int b_frame_strategy; 527 int b_sensitivity; 528 529 /* frame skip options for encoding */ 530 int frame_skip_threshold; 531 int frame_skip_factor; 532 int frame_skip_exp; 533 int frame_skip_cmp; 534 535 int scenechange_threshold; 536 int noise_reduction; 537 538 int intra_penalty; 539} MpegEncContext; 540 541 542/** 543 * Set the given MpegEncContext to common defaults (same for encoding 544 * and decoding). The changed fields will not depend upon the prior 545 * state of the MpegEncContext. 546 */ 547void ff_mpv_common_defaults(MpegEncContext *s); 548 549int ff_mpv_common_init(MpegEncContext *s); 550void ff_mpv_common_init_arm(MpegEncContext *s); 551void ff_mpv_common_init_axp(MpegEncContext *s); 552void ff_mpv_common_init_neon(MpegEncContext *s); 553void ff_mpv_common_init_ppc(MpegEncContext *s); 554void ff_mpv_common_init_x86(MpegEncContext *s); 555void ff_mpv_common_init_mips(MpegEncContext *s); 556/** 557 * Initialize an MpegEncContext's thread contexts. Presumes that 558 * slice_context_count is already set and that all the fields 559 * that are freed/reset in free_duplicate_context() are NULL. 560 */ 561int ff_mpv_init_duplicate_contexts(MpegEncContext *s); 562/** 563 * Initialize and allocates MpegEncContext fields dependent on the resolution. 564 */ 565int ff_mpv_init_context_frame(MpegEncContext *s); 566/** 567 * Frees and resets MpegEncContext fields depending on the resolution 568 * as well as the slice thread contexts. 569 * Is used during resolution changes to avoid a full reinitialization of the 570 * codec. 571 */ 572void ff_mpv_free_context_frame(MpegEncContext *s); 573 574void ff_mpv_common_end(MpegEncContext *s); 575 576void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]); 577 578void ff_clean_intra_table_entries(MpegEncContext *s); 579 580int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src); 581void ff_set_qscale(MpegEncContext * s, int qscale); 582 583void ff_mpv_idct_init(MpegEncContext *s); 584void ff_init_block_index(MpegEncContext *s); 585 586void ff_mpv_motion(MpegEncContext *s, 587 uint8_t *dest_y, uint8_t *dest_cb, 588 uint8_t *dest_cr, int dir, 589 uint8_t **ref_picture, 590 op_pixels_func (*pix_op)[4], 591 qpel_mc_func (*qpix_op)[16]); 592 593static inline void ff_update_block_index(MpegEncContext *s){ 594 const int bytes_per_pixel = 1 + (s->avctx->bits_per_raw_sample > 8); 595 const int block_size= (8*bytes_per_pixel) >> s->avctx->lowres; 596 597 s->block_index[0]+=2; 598 s->block_index[1]+=2; 599 s->block_index[2]+=2; 600 s->block_index[3]+=2; 601 s->block_index[4]++; 602 s->block_index[5]++; 603 s->dest[0]+= 2*block_size; 604 s->dest[1]+= (2 >> s->chroma_x_shift) * block_size; 605 s->dest[2]+= (2 >> s->chroma_x_shift) * block_size; 606} 607 608#endif /* AVCODEC_MPEGVIDEO_H */ 609