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"
39 #include "ratecontrol.h"
41 #include "mpeg12data.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/timecode.h"
49 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
58 #define MPEG_BUF_SIZE (16 * 1024)
60 #define QMAT_SHIFT_MMX 16
66 #define MAX_THREADS 32
67 #define MAX_PICTURE_COUNT 36
69 #define ME_MAP_SIZE 64
70 #define ME_MAP_SHIFT 3
71 #define ME_MAP_MV_BITS 11
73 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
75 #define INPLACE_OFFSET 16
78 #define SEQ_END_CODE 0x000001b7
79 #define SEQ_START_CODE 0x000001b3
80 #define GOP_START_CODE 0x000001b8
81 #define PICTURE_START_CODE 0x00000100
82 #define SLICE_MIN_START_CODE 0x00000101
83 #define SLICE_MAX_START_CODE 0x000001af
84 #define EXT_START_CODE 0x000001b5
85 #define USER_START_CODE 0x000001b2
88 * Value of Picture.reference when Picture is not a reference picture, but
89 * is held for delayed output.
91 #define DELAYED_PIC_REF 4
93 struct MpegEncContext;
98 typedef struct Picture{
102 AVBufferRef *qscale_table_buf;
103 int8_t *qscale_table;
105 AVBufferRef *motion_val_buf[2];
106 int16_t (*motion_val[2])[2];
108 AVBufferRef *mb_type_buf;
111 AVBufferRef *mbskip_table_buf;
112 uint8_t *mbskip_table;
114 AVBufferRef *ref_index_buf[2];
115 int8_t *ref_index[2];
117 AVBufferRef *mb_var_buf;
118 uint16_t *mb_var; ///< Table for MB variances
120 AVBufferRef *mc_mb_var_buf;
121 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
123 int alloc_mb_width; ///< mb_width used to allocate tables
124 int alloc_mb_height; ///< mb_height used to allocate tables
126 AVBufferRef *mb_mean_buf;
127 uint8_t *mb_mean; ///< Table for MB luminance
129 AVBufferRef *hwaccel_priv_buf;
131 * hardware accelerator private data
133 void *hwaccel_picture_private;
135 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
136 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
137 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
138 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
139 #define IS_INTRA(a) ((a)&7)
140 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
141 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
142 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
143 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
144 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
145 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
146 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
147 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
148 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
149 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
150 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
151 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
152 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
153 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
154 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
155 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
156 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
157 #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
158 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
160 int field_poc[2]; ///< h264 top/bottom POC
161 int poc; ///< h264 frame POC
162 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
163 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
164 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
165 pic_num & max_pic_num; long -> long_pic_num) */
166 int long_ref; ///< 1->long term reference 0->short term reference
167 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
168 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
169 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
170 int field_picture; ///< whether or not the picture was encoded in separate fields
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)
180 int recovered; ///< Picture at IDR or recovery point + recovery count
188 * Motion estimation context.
190 typedef struct MotionEstContext{
191 AVCodecContext *avctx;
192 int skip; ///< set if ME is skipped for the current MB
193 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
194 int direct_basis_mv[4][2];
195 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
200 uint32_t *map; ///< map to avoid duplicate evaluations
201 uint32_t *score_map; ///< map to store the scores
202 unsigned map_generation;
203 int pre_penalty_factor;
204 int penalty_factor; /**< an estimate of the bits required to
205 code a given mv value, e.g. (1,0) takes
206 more bits than (0,0). We have to
207 estimate whether any reduction in
208 residual is worth the extra bits. */
209 int sub_penalty_factor;
210 int mb_penalty_factor;
214 int pre_pass; ///< = 1 for the pre pass
226 /* temp variables for picture complexity calculation */
227 int mc_mb_var_sum_temp;
229 int scene_change_score;
230 /* cmp, chroma_cmp;*/
231 op_pixels_func (*hpel_put)[4];
232 op_pixels_func (*hpel_avg)[4];
233 qpel_mc_func (*qpel_put)[16];
234 qpel_mc_func (*qpel_avg)[16];
235 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
236 uint8_t *current_mv_penalty;
237 int (*sub_motion_search)(struct MpegEncContext * s,
238 int *mx_ptr, int *my_ptr, int dmin,
239 int src_index, int ref_index,
246 typedef struct MpegEncContext {
248 struct AVCodecContext *avctx;
249 /* the following parameters must be initialized before encoding */
250 int width, height;///< picture size. must be a multiple of 16
252 int intra_only; ///< if true, only intra pictures are generated
253 int bit_rate; ///< wanted bit rate
254 enum OutputFormat out_format; ///< output format
255 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
256 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
258 /* the following codec id fields are deprecated in favor of codec_id */
259 int h263_plus; ///< h263 plus headers
260 int h263_flv; ///< use flv h263 header
262 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
263 int fixed_qscale; ///< fixed qscale if non zero
264 int encoding; ///< true if we are encoding (vs decoding)
265 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
266 int flags2; ///< AVCodecContext.flags2
267 int max_b_frames; ///< max number of b-frames for encoding
268 int luma_elim_threshold;
269 int chroma_elim_threshold;
270 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
271 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
272 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
273 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
274 /* the following fields are managed internally by the encoder */
276 /* sequence parameters */
277 int context_initialized;
278 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
279 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
280 int picture_number; //FIXME remove, unclear definition
281 int picture_in_gop_number; ///< 0-> first pic in gop, ...
282 int mb_width, mb_height; ///< number of MBs horizontally & vertically
283 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
284 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
285 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
286 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
287 int mb_num; ///< number of MBs of a picture
288 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
289 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
290 Picture *picture; ///< main picture buffer
291 Picture **input_picture; ///< next pictures on display order for encoding
292 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
294 int y_dc_scale, c_dc_scale;
296 int block_last_index[12]; ///< last non zero coefficient in block
297 int h263_aic; ///< Advanded INTRA Coding (AIC)
300 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
301 ScanTable intra_scantable;
302 ScanTable intra_h_scantable;
303 ScanTable intra_v_scantable;
305 /* WARNING: changes above this line require updates to hardcoded
306 * offsets used in asm. */
308 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
310 * pts difference between the first and second input frame, used for
311 * calculating dts of the first frame when there's a delay */
314 * reordered pts to be used as dts for the next output frame when there's
316 int64_t reordered_pts;
321 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
322 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
323 struct MpegEncContext *thread_context[MAX_THREADS];
324 int slice_context_count; ///< number of used thread_contexts
327 * copy of the previous picture structure.
328 * note, linesize & data, might not match the previous picture (for field pictures)
330 Picture last_picture;
333 * copy of the next picture structure.
334 * note, linesize & data, might not match the next picture (for field pictures)
336 Picture next_picture;
339 * copy of the source picture structure for encoding.
340 * note, linesize & data, might not match the source picture (for field pictures)
345 * copy of the current picture structure.
346 * note, linesize & data, might not match the current picture (for field pictures)
348 Picture current_picture; ///< buffer to store the decompressed current picture
350 Picture *last_picture_ptr; ///< pointer to the previous picture.
351 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
352 Picture *current_picture_ptr; ///< pointer to the current picture
353 int last_dc[3]; ///< last DC values for MPEG1
354 int16_t *dc_val_base;
355 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
356 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
357 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
358 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
359 uint8_t *coded_block_base;
360 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
361 int16_t (*ac_val_base)[16];
362 int16_t (*ac_val[3])[16]; ///< used for mpeg4 AC prediction, all 3 arrays must be continuous
363 int mb_skipped; ///< MUST BE SET only during DECODING
364 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
365 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
366 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
367 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
368 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
369 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
370 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
371 uint8_t *obmc_scratchpad;
372 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
375 int chroma_qscale; ///< chroma QP
376 unsigned int lambda; ///< lagrange multipler used in rate distortion
377 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
379 int adaptive_quant; ///< use adaptive quantization
380 int dquant; ///< qscale difference to prev qscale
381 int closed_gop; ///< MPEG1/2 GOP is closed
382 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
384 int last_pict_type; //FIXME removes
385 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
387 int frame_rate_index;
388 AVRational mpeg2_frame_rate_ext;
389 int last_lambda_for[5]; ///< last lambda for a specific pict type
390 int skipdct; ///< skip dct and code zero residual
392 /* motion compensation */
393 int unrestricted_mv; ///< mv can point outside of the coded picture
394 int h263_long_vectors; ///< use horrible h263v1 long vector mode
396 DSPContext dsp; ///< pointers for accelerated dsp functions
397 H264ChromaContext h264chroma;
399 VideoDSPContext vdsp;
400 H263DSPContext h263dsp;
401 int f_code; ///< forward MV resolution
402 int b_code; ///< backward MV resolution for B Frames (mpeg4)
403 int16_t (*p_mv_table_base)[2];
404 int16_t (*b_forw_mv_table_base)[2];
405 int16_t (*b_back_mv_table_base)[2];
406 int16_t (*b_bidir_forw_mv_table_base)[2];
407 int16_t (*b_bidir_back_mv_table_base)[2];
408 int16_t (*b_direct_mv_table_base)[2];
409 int16_t (*p_field_mv_table_base[2][2])[2];
410 int16_t (*b_field_mv_table_base[2][2][2])[2];
411 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
412 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
413 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
414 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
415 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
416 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
417 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
418 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
419 uint8_t (*p_field_select_table[2]);
420 uint8_t (*b_field_select_table[2][2]);
421 int me_method; ///< ME algorithm
423 #define MV_DIR_FORWARD 1
424 #define MV_DIR_BACKWARD 2
425 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
427 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
428 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
429 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
430 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
431 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
432 /**motion vectors for a macroblock
433 first coordinate : 0 = forward 1 = backward
434 second " : depend on type
435 third " : 0 = x, 1 = y
438 int field_select[2][2];
439 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
440 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
441 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
445 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
446 for b-frames rounding mode is always 0 */
448 /* macroblock layer */
452 uint16_t *mb_type; ///< Table for candidate MB types for encoding
453 #define CANDIDATE_MB_TYPE_INTRA 0x01
454 #define CANDIDATE_MB_TYPE_INTER 0x02
455 #define CANDIDATE_MB_TYPE_INTER4V 0x04
456 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
457 //#define MB_TYPE_GMC 0x10
459 #define CANDIDATE_MB_TYPE_DIRECT 0x10
460 #define CANDIDATE_MB_TYPE_FORWARD 0x20
461 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
462 #define CANDIDATE_MB_TYPE_BIDIR 0x80
464 #define CANDIDATE_MB_TYPE_INTER_I 0x100
465 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
466 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
467 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
469 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
471 int block_index[6]; ///< index to current MB in block based arrays with edges
475 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
477 /** matrix transmitted in the bitstream */
478 uint16_t intra_matrix[64];
479 uint16_t chroma_intra_matrix[64];
480 uint16_t inter_matrix[64];
481 uint16_t chroma_inter_matrix[64];
482 #define QUANT_BIAS_SHIFT 8
483 int intra_quant_bias; ///< bias for the quantizer
484 int inter_quant_bias; ///< bias for the quantizer
485 int min_qcoeff; ///< minimum encodable coefficient
486 int max_qcoeff; ///< maximum encodable coefficient
487 int ac_esc_length; ///< num of bits needed to encode the longest esc
488 uint8_t *intra_ac_vlc_length;
489 uint8_t *intra_ac_vlc_last_length;
490 uint8_t *inter_ac_vlc_length;
491 uint8_t *inter_ac_vlc_last_length;
492 uint8_t *luma_dc_vlc_length;
493 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
497 /** precomputed matrix (combine qscale and DCT renorm) */
498 int (*q_intra_matrix)[64];
499 int (*q_chroma_intra_matrix)[64];
500 int (*q_inter_matrix)[64];
501 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
502 uint16_t (*q_intra_matrix16)[2][64];
503 uint16_t (*q_chroma_intra_matrix16)[2][64];
504 uint16_t (*q_inter_matrix16)[2][64];
506 /* noise reduction */
507 int (*dct_error_sum)[64];
509 uint16_t (*dct_offset)[64];
511 void *opaque; ///< private data for the user
513 /* bit rate control */
515 int frame_bits; ///< bits used for the current frame
516 int stuffing_bits; ///< bits used for stuffing
517 int next_lambda; ///< next lambda used for retrying to encode a frame
518 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
520 /* statistics, used for 2-pass encoding */
529 int misc_bits; ///< cbp, mb_type
530 int last_bits; ///< temp var used for calculating the above vars
532 /* error concealment / resync */
533 int resync_mb_x; ///< x position of last resync marker
534 int resync_mb_y; ///< y position of last resync marker
535 GetBitContext last_resync_gb; ///< used to search for the next resync marker
536 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
537 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
540 ParseContext parse_context;
544 int obmc; ///< overlapped block motion compensation
545 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
546 int mb_info; ///< interval for outputting info about mb offsets as side data
547 int prev_mb_info, last_mb_info;
548 uint8_t *mb_info_ptr;
552 /* H.263+ specific */
553 int umvplus; ///< == H263+ && unrestricted_mv
554 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
555 int h263_slice_structured;
556 int alt_inter_vlc; ///< alternative inter vlc
562 int time_increment_bits; ///< number of bits to represent the fractional part of time
564 int time_base; ///< time in seconds of last I,P,S Frame
565 int64_t time; ///< time of current frame
566 int64_t last_non_b_time;
567 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
568 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
569 uint16_t pp_field_time;
570 uint16_t pb_field_time; ///< like above, just for interlaced
572 int vol_sprite_usage;
577 int sprite_brightness_change;
578 int num_sprite_warping_points;
579 int real_sprite_warping_points;
580 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
581 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
582 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
583 int sprite_shift[2]; ///< sprite shift [isChroma]
586 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
589 int enhancement_type;
592 int aspect_ratio_info; //FIXME remove
593 int sprite_warping_accuracy;
594 int low_latency_sprite;
595 int data_partitioning; ///< data partitioning flag from header
596 int partitioned_frame; ///< is current frame partitioned
597 int rvlc; ///< reversible vlc
598 int resync_marker; ///< could this stream contain resync markers
599 int low_delay; ///< no reordering needed / has no b-frames
601 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
602 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
603 int use_intra_dc_vlc;
604 PutBitContext tex_pb; ///< used for data partitioned VOPs
605 PutBitContext pb2; ///< used for data partitioned VOPs
607 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
608 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
609 int cplx_estimation_trash_i;
610 int cplx_estimation_trash_p;
611 int cplx_estimation_trash_b;
613 /* divx specific, used to workaround (many) bugs in divx5 */
617 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
618 int bitstream_buffer_size;
619 unsigned int allocated_bitstream_buffer_size;
623 /* lavc specific stuff, used to workaround bugs in libavcodec */
627 int rv10_version; ///< RV10 version: 0 or 3
628 int rv10_first_dc_coded[3];
629 int orig_width, orig_height;
632 struct MJpegContext *mjpeg_ctx;
633 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
634 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
637 /* MSMPEG4 specific */
640 int rl_chroma_table_index;
642 int use_skip_mb_code;
643 int slice_height; ///< in macroblocks
644 int first_slice_line; ///< used in mpeg4 too to handle resync markers
645 int flipflop_rounding;
646 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
648 int esc3_level_length;
650 /** [mb_intra][isChroma][level][run][last] */
651 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
652 int inter_intra_pred;
655 /* decompression specific */
659 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
660 int last_mv_dir; ///< last mv_dir, used for b frame encoding
661 int broken_link; ///< no_output_of_prior_pics_flag
662 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
664 /* MPEG-2-specific - I wished not to have to support this mess. */
665 int progressive_sequence;
666 int mpeg_f_code[2][2];
667 int picture_structure;
669 #define PICT_TOP_FIELD 1
670 #define PICT_BOTTOM_FIELD 2
673 int intra_dc_precision;
674 int frame_pred_frame_dct;
676 int concealment_motion_vectors;
678 int intra_vlc_format;
680 int repeat_first_field;
686 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
689 int progressive_frame;
693 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
694 int drop_frame_timecode; ///< timecode is in drop frame format.
695 int scan_offset; ///< reserve space for SVCD scan offset user data.
700 char *tc_opt_str; ///< timecode option string
701 AVTimecode tc; ///< timecode context
703 uint8_t *ptr_lastgob;
704 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
705 int16_t (*pblocks[12])[64];
707 int16_t (*block)[64]; ///< points to one of the following blocks
708 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
709 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
711 #define SLICE_ERROR -1
712 #define SLICE_END -2 ///<end marker found
713 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
715 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
716 int16_t *block/*align 16*/, int n, int qscale);
717 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
718 int16_t *block/*align 16*/, int n, int qscale);
719 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
720 int16_t *block/*align 16*/, int n, int qscale);
721 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
722 int16_t *block/*align 16*/, int n, int qscale);
723 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
724 int16_t *block/*align 16*/, int n, int qscale);
725 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
726 int16_t *block/*align 16*/, int n, int qscale);
727 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
728 int16_t *block/*align 16*/, int n, int qscale);
729 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
730 int16_t *block/*align 16*/, int n, int qscale);
731 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
732 int16_t *block/*align 16*/, int n, int qscale);
733 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
734 int16_t *block/*align 16*/, int n, int qscale);
735 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
736 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
737 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
739 int mpv_flags; ///< flags set by private options
740 int quantizer_noise_shaping;
742 /* temp buffers for rate control */
743 float *cplx_tab, *bits_tab;
745 /* flag to indicate a reinitialization is required, e.g. after
746 * a frame size change */
752 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
753 ((pic && pic >= old_ctx->picture && \
754 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
755 &new_ctx->picture[pic - old_ctx->picture] : NULL)
757 /* mpegvideo_enc common options */
758 #define FF_MPV_FLAG_SKIP_RD 0x0001
759 #define FF_MPV_FLAG_STRICT_GOP 0x0002
760 #define FF_MPV_FLAG_QP_RD 0x0004
761 #define FF_MPV_FLAG_CBP_RD 0x0008
763 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
764 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
765 #define FF_MPV_COMMON_OPTS \
766 { "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" },\
767 { "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" },\
768 { "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" },\
769 { "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" },\
770 { "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" },\
771 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
772 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
773 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
774 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
775 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
777 extern const AVOption ff_mpv_generic_options[];
779 #define FF_MPV_GENERIC_CLASS(name) \
780 static const AVClass name ## _class = {\
781 .class_name = #name " encoder",\
782 .item_name = av_default_item_name,\
783 .option = ff_mpv_generic_options,\
784 .version = LIBAVUTIL_VERSION_INT,\
788 * Set the given MpegEncContext to common defaults (same for encoding
789 * and decoding). The changed fields will not depend upon the prior
790 * state of the MpegEncContext.
792 void ff_MPV_common_defaults(MpegEncContext *s);
794 void ff_MPV_decode_defaults(MpegEncContext *s);
795 int ff_MPV_common_init(MpegEncContext *s);
796 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
797 int ff_MPV_common_frame_size_change(MpegEncContext *s);
798 void ff_MPV_common_end(MpegEncContext *s);
799 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
800 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
801 void ff_MPV_frame_end(MpegEncContext *s);
802 int ff_MPV_encode_init(AVCodecContext *avctx);
803 int ff_MPV_encode_end(AVCodecContext *avctx);
804 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
805 AVFrame *frame, int *got_packet);
806 void ff_dct_encode_init_x86(MpegEncContext *s);
807 void ff_MPV_common_init_x86(MpegEncContext *s);
808 void ff_MPV_common_init_axp(MpegEncContext *s);
809 void ff_MPV_common_init_arm(MpegEncContext *s);
810 void ff_MPV_common_init_bfin(MpegEncContext *s);
811 void ff_MPV_common_init_ppc(MpegEncContext *s);
812 void ff_clean_intra_table_entries(MpegEncContext *s);
813 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
814 Picture *last, int y, int h, int picture_structure,
815 int first_field, int draw_edges, int low_delay,
816 int v_edge_pos, int h_edge_pos);
817 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
818 void ff_mpeg_flush(AVCodecContext *avctx);
820 void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
821 void ff_print_debug_info2(AVCodecContext *avctx, Picture *p, AVFrame *pict, uint8_t *mbskip_table,
823 int mb_width, int mb_height, int mb_stride, int quarter_sample);
825 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
827 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
828 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
829 int ff_find_unused_picture(MpegEncContext *s, int shared);
830 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
831 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
832 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
833 void ff_MPV_report_decode_progress(MpegEncContext *s);
834 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
835 void ff_set_qscale(MpegEncContext * s, int qscale);
837 void ff_mpeg_er_frame_start(MpegEncContext *s);
839 int ff_dct_common_init(MpegEncContext *s);
840 int ff_dct_encode_init(MpegEncContext *s);
841 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
842 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
843 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
845 void ff_init_block_index(MpegEncContext *s);
847 void ff_MPV_motion(MpegEncContext *s,
848 uint8_t *dest_y, uint8_t *dest_cb,
849 uint8_t *dest_cr, int dir,
850 uint8_t **ref_picture,
851 op_pixels_func (*pix_op)[4],
852 qpel_mc_func (*qpix_op)[16]);
855 * Allocate a Picture.
856 * The pixels are allocated/set by calling get_buffer() if shared = 0.
858 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
860 extern const enum AVPixelFormat ff_pixfmt_list_420[];
863 * permute block according to permuatation.
864 * @param last last non zero element in scantable order
866 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
868 static inline void ff_update_block_index(MpegEncContext *s){
869 const int block_size= 8 >> s->avctx->lowres;
871 s->block_index[0]+=2;
872 s->block_index[1]+=2;
873 s->block_index[2]+=2;
874 s->block_index[3]+=2;
877 s->dest[0]+= 2*block_size;
878 s->dest[1]+= block_size;
879 s->dest[2]+= block_size;
882 static inline int get_bits_diff(MpegEncContext *s){
883 const int bits= put_bits_count(&s->pb);
884 const int last= s->last_bits;
891 static inline int ff_h263_round_chroma(int x){
892 static const uint8_t h263_chroma_roundtab[16] = {
893 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
894 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
896 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
900 void ff_estimate_p_frame_motion(MpegEncContext * s,
902 void ff_estimate_b_frame_motion(MpegEncContext * s,
904 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
905 void ff_fix_long_p_mvs(MpegEncContext * s);
906 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
907 int16_t (*mv_table)[2], int f_code, int type, int truncate);
908 int ff_init_me(MpegEncContext *s);
909 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
910 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
911 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
912 int ref_mv_scale, int size, int h);
913 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
914 int ref_index, int size, int h, int add_rate);
917 extern const uint8_t ff_mpeg1_dc_scale_table[128];
918 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
920 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
921 void ff_mpeg1_encode_mb(MpegEncContext *s,
922 int16_t block[6][64],
923 int motion_x, int motion_y);
924 void ff_mpeg1_encode_init(MpegEncContext *s);
925 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
927 extern const uint8_t ff_aic_dc_scale_table[32];
928 extern const uint8_t ff_h263_chroma_qscale_table[32];
931 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
932 int ff_rv_decode_dc(MpegEncContext *s, int n);
933 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
937 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
938 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
939 void ff_msmpeg4_encode_mb(MpegEncContext * s,
940 int16_t block[6][64],
941 int motion_x, int motion_y);
942 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
943 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
944 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
945 void ff_msmpeg4_encode_init(MpegEncContext *s);
946 int ff_wmv2_decode_picture_header(MpegEncContext * s);
947 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
948 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
949 void ff_mspel_motion(MpegEncContext *s,
950 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
951 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
952 int motion_x, int motion_y, int h);
953 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
954 void ff_wmv2_encode_mb(MpegEncContext * s,
955 int16_t block[6][64],
956 int motion_x, int motion_y);
958 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
959 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
962 #endif /* AVCODEC_MPEGVIDEO_H */