2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
6 * This file is part of FFmpeg.
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.
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.
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
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
33 #include "error_resilience.h"
35 #include "h264chroma.h"
38 #include "ratecontrol.h"
40 #include "mpeg12data.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/timecode.h"
48 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
57 #define MPEG_BUF_SIZE (16 * 1024)
59 #define QMAT_SHIFT_MMX 16
65 #define MAX_THREADS 32
66 #define MAX_PICTURE_COUNT 36
68 #define ME_MAP_SIZE 64
69 #define ME_MAP_SHIFT 3
70 #define ME_MAP_MV_BITS 11
72 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
74 #define INPLACE_OFFSET 16
77 #define SEQ_END_CODE 0x000001b7
78 #define SEQ_START_CODE 0x000001b3
79 #define GOP_START_CODE 0x000001b8
80 #define PICTURE_START_CODE 0x00000100
81 #define SLICE_MIN_START_CODE 0x00000101
82 #define SLICE_MAX_START_CODE 0x000001af
83 #define EXT_START_CODE 0x000001b5
84 #define USER_START_CODE 0x000001b2
87 * Value of Picture.reference when Picture is not a reference picture, but
88 * is held for delayed output.
90 #define DELAYED_PIC_REF 4
92 struct MpegEncContext;
97 typedef struct Picture{
101 AVBufferRef *qscale_table_buf;
102 int8_t *qscale_table;
104 AVBufferRef *motion_val_buf[2];
105 int16_t (*motion_val[2])[2];
107 AVBufferRef *mb_type_buf;
110 AVBufferRef *mbskip_table_buf;
111 uint8_t *mbskip_table;
113 AVBufferRef *ref_index_buf[2];
114 int8_t *ref_index[2];
116 AVBufferRef *mb_var_buf;
117 uint16_t *mb_var; ///< Table for MB variances
119 AVBufferRef *mc_mb_var_buf;
120 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
122 int alloc_mb_width; ///< mb_width used to allocate tables
123 int alloc_mb_height; ///< mb_height used to allocate tables
125 AVBufferRef *mb_mean_buf;
126 uint8_t *mb_mean; ///< Table for MB luminance
128 AVBufferRef *hwaccel_priv_buf;
130 * hardware accelerator private data
132 void *hwaccel_picture_private;
134 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
135 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
136 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
137 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
138 #define IS_INTRA(a) ((a)&7)
139 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
140 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
141 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
142 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
143 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
144 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
145 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
146 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
147 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
148 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
149 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
150 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
151 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
152 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
153 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
154 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
155 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
156 #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
157 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
159 int field_poc[2]; ///< h264 top/bottom POC
160 int poc; ///< h264 frame POC
161 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
162 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
163 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
164 pic_num & max_pic_num; long -> long_pic_num) */
165 int long_ref; ///< 1->long term reference 0->short term reference
166 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
167 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
168 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
169 int field_picture; ///< whether or not the picture was encoded in separate fields
170 int sync; ///< has been decoded after a keyframe
172 int mb_var_sum; ///< sum of MB variance for current frame
173 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
176 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
187 * Motion estimation context.
189 typedef struct MotionEstContext{
190 AVCodecContext *avctx;
191 int skip; ///< set if ME is skipped for the current MB
192 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
193 int direct_basis_mv[4][2];
194 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
199 uint32_t *map; ///< map to avoid duplicate evaluations
200 uint32_t *score_map; ///< map to store the scores
201 unsigned map_generation;
202 int pre_penalty_factor;
203 int penalty_factor; /**< an estimate of the bits required to
204 code a given mv value, e.g. (1,0) takes
205 more bits than (0,0). We have to
206 estimate whether any reduction in
207 residual is worth the extra bits. */
208 int sub_penalty_factor;
209 int mb_penalty_factor;
213 int pre_pass; ///< = 1 for the pre pass
225 /* temp variables for picture complexity calculation */
226 int mc_mb_var_sum_temp;
228 int scene_change_score;
229 /* cmp, chroma_cmp;*/
230 op_pixels_func (*hpel_put)[4];
231 op_pixels_func (*hpel_avg)[4];
232 qpel_mc_func (*qpel_put)[16];
233 qpel_mc_func (*qpel_avg)[16];
234 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
235 uint8_t *current_mv_penalty;
236 int (*sub_motion_search)(struct MpegEncContext * s,
237 int *mx_ptr, int *my_ptr, int dmin,
238 int src_index, int ref_index,
245 typedef struct MpegEncContext {
247 struct AVCodecContext *avctx;
248 /* the following parameters must be initialized before encoding */
249 int width, height;///< picture size. must be a multiple of 16
251 int intra_only; ///< if true, only intra pictures are generated
252 int bit_rate; ///< wanted bit rate
253 enum OutputFormat out_format; ///< output format
254 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
255 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
257 /* the following codec id fields are deprecated in favor of codec_id */
258 int h263_plus; ///< h263 plus headers
259 int h263_flv; ///< use flv h263 header
261 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
262 int fixed_qscale; ///< fixed qscale if non zero
263 int encoding; ///< true if we are encoding (vs decoding)
264 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
265 int flags2; ///< AVCodecContext.flags2
266 int max_b_frames; ///< max number of b-frames for encoding
267 int luma_elim_threshold;
268 int chroma_elim_threshold;
269 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
270 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
271 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
272 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
273 /* the following fields are managed internally by the encoder */
275 /* sequence parameters */
276 int context_initialized;
277 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
278 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
279 int picture_number; //FIXME remove, unclear definition
280 int picture_in_gop_number; ///< 0-> first pic in gop, ...
281 int mb_width, mb_height; ///< number of MBs horizontally & vertically
282 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
283 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
284 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
285 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
286 int mb_num; ///< number of MBs of a picture
287 int linesize; ///< line size, in bytes, may be different from width
288 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
289 Picture *picture; ///< main picture buffer
290 Picture **input_picture; ///< next pictures on display order for encoding
291 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
293 int y_dc_scale, c_dc_scale;
295 int block_last_index[12]; ///< last non zero coefficient in block
296 int h263_aic; ///< Advanded INTRA Coding (AIC)
299 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
300 ScanTable intra_scantable;
301 ScanTable intra_h_scantable;
302 ScanTable intra_v_scantable;
304 /* WARNING: changes above this line require updates to hardcoded
305 * offsets used in asm. */
307 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
309 * pts difference between the first and second input frame, used for
310 * calculating dts of the first frame when there's a delay */
313 * reordered pts to be used as dts for the next output frame when there's
315 int64_t reordered_pts;
320 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
321 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
322 struct MpegEncContext *thread_context[MAX_THREADS];
323 int slice_context_count; ///< number of used thread_contexts
326 * copy of the previous picture structure.
327 * note, linesize & data, might not match the previous picture (for field pictures)
329 Picture last_picture;
332 * copy of the next picture structure.
333 * note, linesize & data, might not match the next picture (for field pictures)
335 Picture next_picture;
338 * copy of the source picture structure for encoding.
339 * note, linesize & data, might not match the source picture (for field pictures)
344 * copy of the current picture structure.
345 * note, linesize & data, might not match the current picture (for field pictures)
347 Picture current_picture; ///< buffer to store the decompressed current picture
349 Picture *last_picture_ptr; ///< pointer to the previous picture.
350 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
351 Picture *current_picture_ptr; ///< pointer to the current picture
352 int last_dc[3]; ///< last DC values for MPEG1
353 int16_t *dc_val_base;
354 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
355 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
356 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
357 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
358 uint8_t *coded_block_base;
359 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
360 int16_t (*ac_val_base)[16];
361 int16_t (*ac_val[3])[16]; ///< used for mpeg4 AC prediction, all 3 arrays must be continuous
362 int mb_skipped; ///< MUST BE SET only during DECODING
363 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
364 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
365 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
366 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
367 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
368 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
369 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
370 uint8_t *obmc_scratchpad;
371 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
374 int chroma_qscale; ///< chroma QP
375 unsigned int lambda; ///< lagrange multipler used in rate distortion
376 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
378 int adaptive_quant; ///< use adaptive quantization
379 int dquant; ///< qscale difference to prev qscale
380 int closed_gop; ///< MPEG1/2 GOP is closed
381 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
383 int last_pict_type; //FIXME removes
384 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
386 int frame_rate_index;
387 AVRational mpeg2_frame_rate_ext;
388 int last_lambda_for[5]; ///< last lambda for a specific pict type
389 int skipdct; ///< skip dct and code zero residual
391 /* motion compensation */
392 int unrestricted_mv; ///< mv can point outside of the coded picture
393 int h263_long_vectors; ///< use horrible h263v1 long vector mode
395 DSPContext dsp; ///< pointers for accelerated dsp functions
396 H264ChromaContext h264chroma;
398 VideoDSPContext vdsp;
399 int f_code; ///< forward MV resolution
400 int b_code; ///< backward MV resolution for B Frames (mpeg4)
401 int16_t (*p_mv_table_base)[2];
402 int16_t (*b_forw_mv_table_base)[2];
403 int16_t (*b_back_mv_table_base)[2];
404 int16_t (*b_bidir_forw_mv_table_base)[2];
405 int16_t (*b_bidir_back_mv_table_base)[2];
406 int16_t (*b_direct_mv_table_base)[2];
407 int16_t (*p_field_mv_table_base[2][2])[2];
408 int16_t (*b_field_mv_table_base[2][2][2])[2];
409 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
410 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
411 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
412 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
413 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
414 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
415 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
416 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
417 uint8_t (*p_field_select_table[2]);
418 uint8_t (*b_field_select_table[2][2]);
419 int me_method; ///< ME algorithm
421 #define MV_DIR_FORWARD 1
422 #define MV_DIR_BACKWARD 2
423 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
425 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
426 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
427 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
428 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
429 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
430 /**motion vectors for a macroblock
431 first coordinate : 0 = forward 1 = backward
432 second " : depend on type
433 third " : 0 = x, 1 = y
436 int field_select[2][2];
437 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
438 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
439 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
443 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
444 for b-frames rounding mode is always 0 */
446 /* macroblock layer */
450 uint16_t *mb_type; ///< Table for candidate MB types for encoding
451 #define CANDIDATE_MB_TYPE_INTRA 0x01
452 #define CANDIDATE_MB_TYPE_INTER 0x02
453 #define CANDIDATE_MB_TYPE_INTER4V 0x04
454 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
455 //#define MB_TYPE_GMC 0x10
457 #define CANDIDATE_MB_TYPE_DIRECT 0x10
458 #define CANDIDATE_MB_TYPE_FORWARD 0x20
459 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
460 #define CANDIDATE_MB_TYPE_BIDIR 0x80
462 #define CANDIDATE_MB_TYPE_INTER_I 0x100
463 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
464 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
465 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
467 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
469 int block_index[6]; ///< index to current MB in block based arrays with edges
473 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
475 /** matrix transmitted in the bitstream */
476 uint16_t intra_matrix[64];
477 uint16_t chroma_intra_matrix[64];
478 uint16_t inter_matrix[64];
479 uint16_t chroma_inter_matrix[64];
480 #define QUANT_BIAS_SHIFT 8
481 int intra_quant_bias; ///< bias for the quantizer
482 int inter_quant_bias; ///< bias for the quantizer
483 int min_qcoeff; ///< minimum encodable coefficient
484 int max_qcoeff; ///< maximum encodable coefficient
485 int ac_esc_length; ///< num of bits needed to encode the longest esc
486 uint8_t *intra_ac_vlc_length;
487 uint8_t *intra_ac_vlc_last_length;
488 uint8_t *inter_ac_vlc_length;
489 uint8_t *inter_ac_vlc_last_length;
490 uint8_t *luma_dc_vlc_length;
491 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
495 /** precomputed matrix (combine qscale and DCT renorm) */
496 int (*q_intra_matrix)[64];
497 int (*q_chroma_intra_matrix)[64];
498 int (*q_inter_matrix)[64];
499 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
500 uint16_t (*q_intra_matrix16)[2][64];
501 uint16_t (*q_chroma_intra_matrix16)[2][64];
502 uint16_t (*q_inter_matrix16)[2][64];
504 /* noise reduction */
505 int (*dct_error_sum)[64];
507 uint16_t (*dct_offset)[64];
509 void *opaque; ///< private data for the user
511 /* bit rate control */
513 int frame_bits; ///< bits used for the current frame
514 int stuffing_bits; ///< bits used for stuffing
515 int next_lambda; ///< next lambda used for retrying to encode a frame
516 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
518 /* statistics, used for 2-pass encoding */
527 int misc_bits; ///< cbp, mb_type
528 int last_bits; ///< temp var used for calculating the above vars
530 /* error concealment / resync */
531 int resync_mb_x; ///< x position of last resync marker
532 int resync_mb_y; ///< y position of last resync marker
533 GetBitContext last_resync_gb; ///< used to search for the next resync marker
534 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
535 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
538 ParseContext parse_context;
542 int obmc; ///< overlapped block motion compensation
543 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
544 int mb_info; ///< interval for outputting info about mb offsets as side data
545 int prev_mb_info, last_mb_info;
546 uint8_t *mb_info_ptr;
549 /* H.263+ specific */
550 int umvplus; ///< == H263+ && unrestricted_mv
551 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
552 int h263_slice_structured;
553 int alt_inter_vlc; ///< alternative inter vlc
559 int time_increment_bits; ///< number of bits to represent the fractional part of time
561 int time_base; ///< time in seconds of last I,P,S Frame
562 int64_t time; ///< time of current frame
563 int64_t last_non_b_time;
564 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
565 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
566 uint16_t pp_field_time;
567 uint16_t pb_field_time; ///< like above, just for interlaced
569 int vol_sprite_usage;
574 int sprite_brightness_change;
575 int num_sprite_warping_points;
576 int real_sprite_warping_points;
577 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
578 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
579 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
580 int sprite_shift[2]; ///< sprite shift [isChroma]
583 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
586 int enhancement_type;
589 int aspect_ratio_info; //FIXME remove
590 int sprite_warping_accuracy;
591 int low_latency_sprite;
592 int data_partitioning; ///< data partitioning flag from header
593 int partitioned_frame; ///< is current frame partitioned
594 int rvlc; ///< reversible vlc
595 int resync_marker; ///< could this stream contain resync markers
596 int low_delay; ///< no reordering needed / has no b-frames
598 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
599 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
600 int use_intra_dc_vlc;
601 PutBitContext tex_pb; ///< used for data partitioned VOPs
602 PutBitContext pb2; ///< used for data partitioned VOPs
604 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
605 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
606 int cplx_estimation_trash_i;
607 int cplx_estimation_trash_p;
608 int cplx_estimation_trash_b;
610 /* divx specific, used to workaround (many) bugs in divx5 */
614 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
615 int bitstream_buffer_size;
616 unsigned int allocated_bitstream_buffer_size;
620 /* lavc specific stuff, used to workaround bugs in libavcodec */
624 int rv10_version; ///< RV10 version: 0 or 3
625 int rv10_first_dc_coded[3];
626 int orig_width, orig_height;
629 struct MJpegContext *mjpeg_ctx;
630 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
631 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
634 /* MSMPEG4 specific */
637 int rl_chroma_table_index;
639 int use_skip_mb_code;
640 int slice_height; ///< in macroblocks
641 int first_slice_line; ///< used in mpeg4 too to handle resync markers
642 int flipflop_rounding;
643 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
645 int esc3_level_length;
647 /** [mb_intra][isChroma][level][run][last] */
648 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
649 int inter_intra_pred;
652 /* decompression specific */
656 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
657 int last_mv_dir; ///< last mv_dir, used for b frame encoding
658 int broken_link; ///< no_output_of_prior_pics_flag
659 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
661 /* MPEG-2-specific - I wished not to have to support this mess. */
662 int progressive_sequence;
663 int mpeg_f_code[2][2];
664 int picture_structure;
666 #define PICT_TOP_FIELD 1
667 #define PICT_BOTTOM_FIELD 2
670 int intra_dc_precision;
671 int frame_pred_frame_dct;
673 int concealment_motion_vectors;
675 int intra_vlc_format;
677 int repeat_first_field;
683 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
686 int progressive_frame;
690 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
691 int drop_frame_timecode; ///< timecode is in drop frame format.
692 int scan_offset; ///< reserve space for SVCD scan offset user data.
697 char *tc_opt_str; ///< timecode option string
698 AVTimecode tc; ///< timecode context
700 uint8_t *ptr_lastgob;
701 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
702 int16_t (*pblocks[12])[64];
704 int16_t (*block)[64]; ///< points to one of the following blocks
705 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
706 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
708 #define SLICE_ERROR -1
709 #define SLICE_END -2 ///<end marker found
710 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
712 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
713 int16_t *block/*align 16*/, int n, int qscale);
714 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
715 int16_t *block/*align 16*/, int n, int qscale);
716 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
717 int16_t *block/*align 16*/, int n, int qscale);
718 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
719 int16_t *block/*align 16*/, int n, int qscale);
720 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
721 int16_t *block/*align 16*/, int n, int qscale);
722 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
723 int16_t *block/*align 16*/, int n, int qscale);
724 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
725 int16_t *block/*align 16*/, int n, int qscale);
726 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
727 int16_t *block/*align 16*/, int n, int qscale);
728 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
729 int16_t *block/*align 16*/, int n, int qscale);
730 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
731 int16_t *block/*align 16*/, int n, int qscale);
732 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
733 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
734 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
736 int mpv_flags; ///< flags set by private options
737 int quantizer_noise_shaping;
739 /* temp buffers for rate control */
740 float *cplx_tab, *bits_tab;
742 /* flag to indicate a reinitialization is required, e.g. after
743 * a frame size change */
749 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
750 ((pic && pic >= old_ctx->picture && \
751 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
752 &new_ctx->picture[pic - old_ctx->picture] : NULL)
754 /* mpegvideo_enc common options */
755 #define FF_MPV_FLAG_SKIP_RD 0x0001
756 #define FF_MPV_FLAG_STRICT_GOP 0x0002
757 #define FF_MPV_FLAG_QP_RD 0x0004
758 #define FF_MPV_FLAG_CBP_RD 0x0008
760 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
761 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
762 #define FF_MPV_COMMON_OPTS \
763 { "mpv_flags", "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\
764 { "skip_rd", "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_SKIP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
765 { "strict_gop", "Strictly enforce gop size", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_STRICT_GOP }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
766 { "qp_rd", "Use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_QP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
767 { "cbp_rd", "use rate distortion optimization for CBP", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_CBP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
768 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
769 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
770 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
771 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
772 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
774 extern const AVOption ff_mpv_generic_options[];
776 #define FF_MPV_GENERIC_CLASS(name) \
777 static const AVClass name ## _class = {\
778 .class_name = #name " encoder",\
779 .item_name = av_default_item_name,\
780 .option = ff_mpv_generic_options,\
781 .version = LIBAVUTIL_VERSION_INT,\
785 * Set the given MpegEncContext to common defaults (same for encoding
786 * and decoding). The changed fields will not depend upon the prior
787 * state of the MpegEncContext.
789 void ff_MPV_common_defaults(MpegEncContext *s);
791 void ff_MPV_decode_defaults(MpegEncContext *s);
792 int ff_MPV_common_init(MpegEncContext *s);
793 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
794 int ff_MPV_common_frame_size_change(MpegEncContext *s);
795 void ff_MPV_common_end(MpegEncContext *s);
796 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
797 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
798 void ff_MPV_frame_end(MpegEncContext *s);
799 int ff_MPV_encode_init(AVCodecContext *avctx);
800 int ff_MPV_encode_end(AVCodecContext *avctx);
801 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
802 AVFrame *frame, int *got_packet);
803 void ff_dct_encode_init_x86(MpegEncContext *s);
804 void ff_MPV_common_init_x86(MpegEncContext *s);
805 void ff_MPV_common_init_axp(MpegEncContext *s);
806 void ff_MPV_common_init_arm(MpegEncContext *s);
807 void ff_MPV_common_init_bfin(MpegEncContext *s);
808 void ff_MPV_common_init_ppc(MpegEncContext *s);
809 void ff_clean_intra_table_entries(MpegEncContext *s);
810 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
811 Picture *last, int y, int h, int picture_structure,
812 int first_field, int draw_edges, int low_delay,
813 int v_edge_pos, int h_edge_pos);
814 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
815 void ff_mpeg_flush(AVCodecContext *avctx);
817 void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
818 void ff_print_debug_info2(AVCodecContext *avctx, Picture *p, AVFrame *pict, uint8_t *mbskip_table,
820 int mb_width, int mb_height, int mb_stride, int quarter_sample);
822 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
824 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
825 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
826 int ff_find_unused_picture(MpegEncContext *s, int shared);
827 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
828 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
829 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
830 void ff_MPV_report_decode_progress(MpegEncContext *s);
831 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
832 void ff_set_qscale(MpegEncContext * s, int qscale);
834 void ff_mpeg_er_frame_start(MpegEncContext *s);
836 int ff_dct_common_init(MpegEncContext *s);
837 int ff_dct_encode_init(MpegEncContext *s);
838 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
839 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
840 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
842 void ff_init_block_index(MpegEncContext *s);
844 void ff_MPV_motion(MpegEncContext *s,
845 uint8_t *dest_y, uint8_t *dest_cb,
846 uint8_t *dest_cr, int dir,
847 uint8_t **ref_picture,
848 op_pixels_func (*pix_op)[4],
849 qpel_mc_func (*qpix_op)[16]);
852 * Allocate a Picture.
853 * The pixels are allocated/set by calling get_buffer() if shared = 0.
855 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
857 extern const enum AVPixelFormat ff_pixfmt_list_420[];
860 * permute block according to permuatation.
861 * @param last last non zero element in scantable order
863 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
865 static inline void ff_update_block_index(MpegEncContext *s){
866 const int block_size= 8 >> s->avctx->lowres;
868 s->block_index[0]+=2;
869 s->block_index[1]+=2;
870 s->block_index[2]+=2;
871 s->block_index[3]+=2;
874 s->dest[0]+= 2*block_size;
875 s->dest[1]+= block_size;
876 s->dest[2]+= block_size;
879 static inline int get_bits_diff(MpegEncContext *s){
880 const int bits= put_bits_count(&s->pb);
881 const int last= s->last_bits;
888 static inline int ff_h263_round_chroma(int x){
889 static const uint8_t h263_chroma_roundtab[16] = {
890 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
891 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
893 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
897 void ff_estimate_p_frame_motion(MpegEncContext * s,
899 void ff_estimate_b_frame_motion(MpegEncContext * s,
901 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
902 void ff_fix_long_p_mvs(MpegEncContext * s);
903 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
904 int16_t (*mv_table)[2], int f_code, int type, int truncate);
905 int ff_init_me(MpegEncContext *s);
906 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
907 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
908 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
909 int ref_mv_scale, int size, int h);
910 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
911 int ref_index, int size, int h, int add_rate);
914 extern const uint8_t ff_mpeg1_dc_scale_table[128];
915 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
917 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
918 void ff_mpeg1_encode_mb(MpegEncContext *s,
919 int16_t block[6][64],
920 int motion_x, int motion_y);
921 void ff_mpeg1_encode_init(MpegEncContext *s);
922 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
924 extern const uint8_t ff_aic_dc_scale_table[32];
925 extern const uint8_t ff_h263_chroma_qscale_table[32];
926 extern const uint8_t ff_h263_loop_filter_strength[32];
929 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
930 int ff_rv_decode_dc(MpegEncContext *s, int n);
931 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
935 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
936 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
937 void ff_msmpeg4_encode_mb(MpegEncContext * s,
938 int16_t block[6][64],
939 int motion_x, int motion_y);
940 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
941 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
942 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
943 void ff_msmpeg4_encode_init(MpegEncContext *s);
944 int ff_wmv2_decode_picture_header(MpegEncContext * s);
945 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
946 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
947 void ff_mspel_motion(MpegEncContext *s,
948 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
949 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
950 int motion_x, int motion_y, int h);
951 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
952 void ff_wmv2_encode_mb(MpegEncContext * s,
953 int16_t block[6][64],
954 int motion_x, int motion_y);
956 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
957 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
960 #endif /* AVCODEC_MPEGVIDEO_H */