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 MAX_B_FRAMES 16
71 #define ME_MAP_SIZE 64
72 #define ME_MAP_SHIFT 3
73 #define ME_MAP_MV_BITS 11
75 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
77 #define INPLACE_OFFSET 16
80 #define SEQ_END_CODE 0x000001b7
81 #define SEQ_START_CODE 0x000001b3
82 #define GOP_START_CODE 0x000001b8
83 #define PICTURE_START_CODE 0x00000100
84 #define SLICE_MIN_START_CODE 0x00000101
85 #define SLICE_MAX_START_CODE 0x000001af
86 #define EXT_START_CODE 0x000001b5
87 #define USER_START_CODE 0x000001b2
90 * Value of Picture.reference when Picture is not a reference picture, but
91 * is held for delayed output.
93 #define DELAYED_PIC_REF 4
95 struct MpegEncContext;
100 typedef struct Picture{
104 AVBufferRef *qscale_table_buf;
105 int8_t *qscale_table;
107 AVBufferRef *motion_val_buf[2];
108 int16_t (*motion_val[2])[2];
110 AVBufferRef *mb_type_buf;
114 #define MB_TYPE_INTRA4x4 0x0001
115 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
116 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
117 #define MB_TYPE_16x16 0x0008
118 #define MB_TYPE_16x8 0x0010
119 #define MB_TYPE_8x16 0x0020
120 #define MB_TYPE_8x8 0x0040
121 #define MB_TYPE_INTERLACED 0x0080
122 #define MB_TYPE_DIRECT2 0x0100 //FIXME
123 #define MB_TYPE_ACPRED 0x0200
124 #define MB_TYPE_GMC 0x0400
125 #define MB_TYPE_SKIP 0x0800
126 #define MB_TYPE_P0L0 0x1000
127 #define MB_TYPE_P1L0 0x2000
128 #define MB_TYPE_P0L1 0x4000
129 #define MB_TYPE_P1L1 0x8000
130 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
131 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
132 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
133 #define MB_TYPE_QUANT 0x00010000
134 #define MB_TYPE_CBP 0x00020000
137 AVBufferRef *mbskip_table_buf;
138 uint8_t *mbskip_table;
140 AVBufferRef *ref_index_buf[2];
141 int8_t *ref_index[2];
143 AVBufferRef *mb_var_buf;
144 uint16_t *mb_var; ///< Table for MB variances
146 AVBufferRef *mc_mb_var_buf;
147 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
149 int alloc_mb_width; ///< mb_width used to allocate tables
150 int alloc_mb_height; ///< mb_height used to allocate tables
152 AVBufferRef *mb_mean_buf;
153 uint8_t *mb_mean; ///< Table for MB luminance
155 AVBufferRef *hwaccel_priv_buf;
157 * hardware accelerator private data
159 void *hwaccel_picture_private;
161 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
162 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
163 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
164 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
165 #define IS_INTRA(a) ((a)&7)
166 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
167 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
168 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
169 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
170 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
171 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
172 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
173 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
174 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
175 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
176 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
177 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
178 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
179 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
180 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
181 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
182 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
183 #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
184 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
186 int field_poc[2]; ///< h264 top/bottom POC
187 int poc; ///< h264 frame POC
188 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
189 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
190 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
191 pic_num & max_pic_num; long -> long_pic_num) */
192 int long_ref; ///< 1->long term reference 0->short term reference
193 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
194 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
195 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
196 int field_picture; ///< whether or not the picture was encoded in separate fields
198 int mb_var_sum; ///< sum of MB variance for current frame
199 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
202 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
206 int recovered; ///< Picture at IDR or recovery point + recovery count
215 * Motion estimation context.
217 typedef struct MotionEstContext{
218 AVCodecContext *avctx;
219 int skip; ///< set if ME is skipped for the current MB
220 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
221 int direct_basis_mv[4][2];
222 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
227 uint32_t *map; ///< map to avoid duplicate evaluations
228 uint32_t *score_map; ///< map to store the scores
229 unsigned map_generation;
230 int pre_penalty_factor;
231 int penalty_factor; /**< an estimate of the bits required to
232 code a given mv value, e.g. (1,0) takes
233 more bits than (0,0). We have to
234 estimate whether any reduction in
235 residual is worth the extra bits. */
236 int sub_penalty_factor;
237 int mb_penalty_factor;
241 int pre_pass; ///< = 1 for the pre pass
253 /* temp variables for picture complexity calculation */
254 int mc_mb_var_sum_temp;
256 int scene_change_score;
257 /* cmp, chroma_cmp;*/
258 op_pixels_func (*hpel_put)[4];
259 op_pixels_func (*hpel_avg)[4];
260 qpel_mc_func (*qpel_put)[16];
261 qpel_mc_func (*qpel_avg)[16];
262 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
263 uint8_t *current_mv_penalty;
264 int (*sub_motion_search)(struct MpegEncContext * s,
265 int *mx_ptr, int *my_ptr, int dmin,
266 int src_index, int ref_index,
273 typedef struct MpegEncContext {
275 struct AVCodecContext *avctx;
276 /* the following parameters must be initialized before encoding */
277 int width, height;///< picture size. must be a multiple of 16
279 int intra_only; ///< if true, only intra pictures are generated
280 int bit_rate; ///< wanted bit rate
281 enum OutputFormat out_format; ///< output format
282 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
283 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
285 /* the following codec id fields are deprecated in favor of codec_id */
286 int h263_plus; ///< h263 plus headers
287 int h263_flv; ///< use flv h263 header
289 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
290 int fixed_qscale; ///< fixed qscale if non zero
291 int encoding; ///< true if we are encoding (vs decoding)
292 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
293 int flags2; ///< AVCodecContext.flags2
294 int max_b_frames; ///< max number of b-frames for encoding
295 int luma_elim_threshold;
296 int chroma_elim_threshold;
297 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
298 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
299 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
300 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
301 /* the following fields are managed internally by the encoder */
303 /* sequence parameters */
304 int context_initialized;
305 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
306 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
307 int picture_number; //FIXME remove, unclear definition
308 int picture_in_gop_number; ///< 0-> first pic in gop, ...
309 int mb_width, mb_height; ///< number of MBs horizontally & vertically
310 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
311 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
312 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
313 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
314 int mb_num; ///< number of MBs of a picture
315 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
316 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
317 Picture *picture; ///< main picture buffer
318 Picture **input_picture; ///< next pictures on display order for encoding
319 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
321 int y_dc_scale, c_dc_scale;
323 int block_last_index[12]; ///< last non zero coefficient in block
324 int h263_aic; ///< Advanded INTRA Coding (AIC)
327 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
328 ScanTable intra_scantable;
329 ScanTable intra_h_scantable;
330 ScanTable intra_v_scantable;
332 /* WARNING: changes above this line require updates to hardcoded
333 * offsets used in asm. */
335 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
337 * pts difference between the first and second input frame, used for
338 * calculating dts of the first frame when there's a delay */
341 * reordered pts to be used as dts for the next output frame when there's
343 int64_t reordered_pts;
348 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
349 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
350 struct MpegEncContext *thread_context[MAX_THREADS];
351 int slice_context_count; ///< number of used thread_contexts
354 * copy of the previous picture structure.
355 * note, linesize & data, might not match the previous picture (for field pictures)
357 Picture last_picture;
360 * copy of the next picture structure.
361 * note, linesize & data, might not match the next picture (for field pictures)
363 Picture next_picture;
366 * copy of the source picture structure for encoding.
367 * note, linesize & data, might not match the source picture (for field pictures)
372 * copy of the current picture structure.
373 * note, linesize & data, might not match the current picture (for field pictures)
375 Picture current_picture; ///< buffer to store the decompressed current picture
377 Picture *last_picture_ptr; ///< pointer to the previous picture.
378 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
379 Picture *current_picture_ptr; ///< pointer to the current picture
380 int last_dc[3]; ///< last DC values for MPEG1
381 int16_t *dc_val_base;
382 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
383 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
384 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
385 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
386 uint8_t *coded_block_base;
387 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
388 int16_t (*ac_val_base)[16];
389 int16_t (*ac_val[3])[16]; ///< used for mpeg4 AC prediction, all 3 arrays must be continuous
390 int mb_skipped; ///< MUST BE SET only during DECODING
391 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
392 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
393 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
394 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
395 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
396 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
397 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
398 uint8_t *obmc_scratchpad;
399 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
402 int chroma_qscale; ///< chroma QP
403 unsigned int lambda; ///< lagrange multipler used in rate distortion
404 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
406 int adaptive_quant; ///< use adaptive quantization
407 int dquant; ///< qscale difference to prev qscale
408 int closed_gop; ///< MPEG1/2 GOP is closed
409 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
411 int last_pict_type; //FIXME removes
412 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
414 int frame_rate_index;
415 AVRational mpeg2_frame_rate_ext;
416 int last_lambda_for[5]; ///< last lambda for a specific pict type
417 int skipdct; ///< skip dct and code zero residual
419 /* motion compensation */
420 int unrestricted_mv; ///< mv can point outside of the coded picture
421 int h263_long_vectors; ///< use horrible h263v1 long vector mode
423 DSPContext dsp; ///< pointers for accelerated dsp functions
424 H264ChromaContext h264chroma;
426 VideoDSPContext vdsp;
427 H263DSPContext h263dsp;
428 int f_code; ///< forward MV resolution
429 int b_code; ///< backward MV resolution for B Frames (mpeg4)
430 int16_t (*p_mv_table_base)[2];
431 int16_t (*b_forw_mv_table_base)[2];
432 int16_t (*b_back_mv_table_base)[2];
433 int16_t (*b_bidir_forw_mv_table_base)[2];
434 int16_t (*b_bidir_back_mv_table_base)[2];
435 int16_t (*b_direct_mv_table_base)[2];
436 int16_t (*p_field_mv_table_base[2][2])[2];
437 int16_t (*b_field_mv_table_base[2][2][2])[2];
438 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
439 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
440 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
441 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
442 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
443 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
444 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
445 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
446 uint8_t (*p_field_select_table[2]);
447 uint8_t (*b_field_select_table[2][2]);
448 int me_method; ///< ME algorithm
450 #define MV_DIR_FORWARD 1
451 #define MV_DIR_BACKWARD 2
452 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
454 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
455 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
456 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
457 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
458 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
459 /**motion vectors for a macroblock
460 first coordinate : 0 = forward 1 = backward
461 second " : depend on type
462 third " : 0 = x, 1 = y
465 int field_select[2][2];
466 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
467 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
468 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
472 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
473 for b-frames rounding mode is always 0 */
475 /* macroblock layer */
479 uint16_t *mb_type; ///< Table for candidate MB types for encoding
480 #define CANDIDATE_MB_TYPE_INTRA 0x01
481 #define CANDIDATE_MB_TYPE_INTER 0x02
482 #define CANDIDATE_MB_TYPE_INTER4V 0x04
483 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
484 //#define MB_TYPE_GMC 0x10
486 #define CANDIDATE_MB_TYPE_DIRECT 0x10
487 #define CANDIDATE_MB_TYPE_FORWARD 0x20
488 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
489 #define CANDIDATE_MB_TYPE_BIDIR 0x80
491 #define CANDIDATE_MB_TYPE_INTER_I 0x100
492 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
493 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
494 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
496 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
498 int block_index[6]; ///< index to current MB in block based arrays with edges
502 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
504 /** matrix transmitted in the bitstream */
505 uint16_t intra_matrix[64];
506 uint16_t chroma_intra_matrix[64];
507 uint16_t inter_matrix[64];
508 uint16_t chroma_inter_matrix[64];
509 #define QUANT_BIAS_SHIFT 8
510 int intra_quant_bias; ///< bias for the quantizer
511 int inter_quant_bias; ///< bias for the quantizer
512 int min_qcoeff; ///< minimum encodable coefficient
513 int max_qcoeff; ///< maximum encodable coefficient
514 int ac_esc_length; ///< num of bits needed to encode the longest esc
515 uint8_t *intra_ac_vlc_length;
516 uint8_t *intra_ac_vlc_last_length;
517 uint8_t *inter_ac_vlc_length;
518 uint8_t *inter_ac_vlc_last_length;
519 uint8_t *luma_dc_vlc_length;
520 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
524 /** precomputed matrix (combine qscale and DCT renorm) */
525 int (*q_intra_matrix)[64];
526 int (*q_chroma_intra_matrix)[64];
527 int (*q_inter_matrix)[64];
528 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
529 uint16_t (*q_intra_matrix16)[2][64];
530 uint16_t (*q_chroma_intra_matrix16)[2][64];
531 uint16_t (*q_inter_matrix16)[2][64];
533 /* noise reduction */
534 int (*dct_error_sum)[64];
536 uint16_t (*dct_offset)[64];
538 void *opaque; ///< private data for the user
540 /* bit rate control */
542 int frame_bits; ///< bits used for the current frame
543 int stuffing_bits; ///< bits used for stuffing
544 int next_lambda; ///< next lambda used for retrying to encode a frame
545 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
547 /* statistics, used for 2-pass encoding */
556 int misc_bits; ///< cbp, mb_type
557 int last_bits; ///< temp var used for calculating the above vars
559 /* error concealment / resync */
560 int resync_mb_x; ///< x position of last resync marker
561 int resync_mb_y; ///< y position of last resync marker
562 GetBitContext last_resync_gb; ///< used to search for the next resync marker
563 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
564 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
567 ParseContext parse_context;
571 int obmc; ///< overlapped block motion compensation
572 int mb_info; ///< interval for outputting info about mb offsets as side data
573 int prev_mb_info, last_mb_info;
574 uint8_t *mb_info_ptr;
578 /* H.263+ specific */
579 int umvplus; ///< == H263+ && unrestricted_mv
580 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
581 int h263_slice_structured;
582 int alt_inter_vlc; ///< alternative inter vlc
588 ///< number of bits to represent the fractional part of time (encoder only)
589 int time_increment_bits;
591 int time_base; ///< time in seconds of last I,P,S Frame
592 int64_t time; ///< time of current frame
593 int64_t last_non_b_time;
594 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
595 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
596 uint16_t pp_field_time;
597 uint16_t pb_field_time; ///< like above, just for interlaced
598 int real_sprite_warping_points;
599 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
600 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
603 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
604 int aspect_ratio_info; //FIXME remove
605 int sprite_warping_accuracy;
606 int data_partitioning; ///< data partitioning flag from header
607 int partitioned_frame; ///< is current frame partitioned
608 int low_delay; ///< no reordering needed / has no b-frames
610 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
611 PutBitContext tex_pb; ///< used for data partitioned VOPs
612 PutBitContext pb2; ///< used for data partitioned VOPs
614 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
616 /* divx specific, used to workaround (many) bugs in divx5 */
618 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
619 int bitstream_buffer_size;
620 unsigned int allocated_bitstream_buffer_size;
623 int rv10_version; ///< RV10 version: 0 or 3
624 int rv10_first_dc_coded[3];
625 int orig_width, orig_height;
628 struct MJpegContext *mjpeg_ctx;
631 /* MSMPEG4 specific */
634 int rl_chroma_table_index;
636 int use_skip_mb_code;
637 int slice_height; ///< in macroblocks
638 int first_slice_line; ///< used in mpeg4 too to handle resync markers
639 int flipflop_rounding;
640 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
642 int esc3_level_length;
644 /** [mb_intra][isChroma][level][run][last] */
645 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
646 int inter_intra_pred;
649 /* decompression specific */
653 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
654 int last_mv_dir; ///< last mv_dir, used for b frame encoding
655 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
657 /* MPEG-2-specific - I wished not to have to support this mess. */
658 int progressive_sequence;
659 int mpeg_f_code[2][2];
660 int picture_structure;
662 #define PICT_TOP_FIELD 1
663 #define PICT_BOTTOM_FIELD 2
666 int intra_dc_precision;
667 int frame_pred_frame_dct;
669 int concealment_motion_vectors;
671 int intra_vlc_format;
673 int repeat_first_field;
679 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
682 int progressive_frame;
685 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
686 int drop_frame_timecode; ///< timecode is in drop frame format.
687 int scan_offset; ///< reserve space for SVCD scan offset user data.
692 char *tc_opt_str; ///< timecode option string
693 AVTimecode tc; ///< timecode context
695 uint8_t *ptr_lastgob;
696 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
697 int pack_pblocks; //xvmc needs to keep blocks without gaps.
698 int16_t (*pblocks[12])[64];
700 int16_t (*block)[64]; ///< points to one of the following blocks
701 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
702 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
704 #define SLICE_ERROR -1
705 #define SLICE_END -2 ///<end marker found
706 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
708 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
709 int16_t *block/*align 16*/, int n, int qscale);
710 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
711 int16_t *block/*align 16*/, int n, int qscale);
712 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
713 int16_t *block/*align 16*/, int n, int qscale);
714 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
715 int16_t *block/*align 16*/, int n, int qscale);
716 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
717 int16_t *block/*align 16*/, int n, int qscale);
718 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
719 int16_t *block/*align 16*/, int n, int qscale);
720 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
721 int16_t *block/*align 16*/, int n, int qscale);
722 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
723 int16_t *block/*align 16*/, int n, int qscale);
724 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
725 int16_t *block/*align 16*/, int n, int qscale);
726 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
727 int16_t *block/*align 16*/, int n, int qscale);
728 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
729 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
730 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
732 int mpv_flags; ///< flags set by private options
733 int quantizer_noise_shaping;
735 /* temp buffers for rate control */
736 float *cplx_tab, *bits_tab;
738 /* flag to indicate a reinitialization is required, e.g. after
739 * a frame size change */
746 /* temporary frames used by b_frame_strategy = 2 */
747 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
750 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
751 ((pic && pic >= old_ctx->picture && \
752 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
753 &new_ctx->picture[pic - old_ctx->picture] : NULL)
755 /* mpegvideo_enc common options */
756 #define FF_MPV_FLAG_SKIP_RD 0x0001
757 #define FF_MPV_FLAG_STRICT_GOP 0x0002
758 #define FF_MPV_FLAG_QP_RD 0x0004
759 #define FF_MPV_FLAG_CBP_RD 0x0008
761 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
762 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
763 #define FF_MPV_COMMON_OPTS \
764 { "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" },\
765 { "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" },\
766 { "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" },\
767 { "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" },\
768 { "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" },\
769 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
770 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
771 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
772 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
773 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
774 { "error_rate", "Simulate errors in the bitstream to test error concealment.", \
775 FF_MPV_OFFSET(error_rate), 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_common_frame_size_change(MpegEncContext *s);
797 void ff_MPV_common_end(MpegEncContext *s);
798 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
799 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
800 void ff_MPV_frame_end(MpegEncContext *s);
801 int ff_MPV_encode_init(AVCodecContext *avctx);
802 int ff_MPV_encode_end(AVCodecContext *avctx);
803 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
804 const AVFrame *frame, int *got_packet);
805 void ff_dct_encode_init_x86(MpegEncContext *s);
806 void ff_MPV_common_init_x86(MpegEncContext *s);
807 void ff_MPV_common_init_axp(MpegEncContext *s);
808 void ff_MPV_common_init_arm(MpegEncContext *s);
809 void ff_MPV_common_init_ppc(MpegEncContext *s);
810 void ff_clean_intra_table_entries(MpegEncContext *s);
811 void ff_draw_horiz_band(AVCodecContext *avctx, Picture *cur, Picture *last,
812 int y, int h, int picture_structure, int first_field,
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 int ff_find_unused_picture(MpegEncContext *s, int shared);
826 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
827 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
828 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
829 void ff_MPV_report_decode_progress(MpegEncContext *s);
830 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
831 void ff_set_qscale(MpegEncContext * s, int qscale);
833 void ff_mpeg_er_frame_start(MpegEncContext *s);
835 int ff_dct_common_init(MpegEncContext *s);
836 int ff_dct_encode_init(MpegEncContext *s);
837 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
838 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
839 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
841 void ff_init_block_index(MpegEncContext *s);
843 void ff_MPV_motion(MpegEncContext *s,
844 uint8_t *dest_y, uint8_t *dest_cb,
845 uint8_t *dest_cr, int dir,
846 uint8_t **ref_picture,
847 op_pixels_func (*pix_op)[4],
848 qpel_mc_func (*qpix_op)[16]);
851 * Allocate a Picture.
852 * The pixels are allocated/set by calling get_buffer() if shared = 0.
854 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
856 extern const enum AVPixelFormat ff_pixfmt_list_420[];
859 * permute block according to permuatation.
860 * @param last last non zero element in scantable order
862 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
864 static inline void ff_update_block_index(MpegEncContext *s){
865 const int block_size= 8 >> s->avctx->lowres;
867 s->block_index[0]+=2;
868 s->block_index[1]+=2;
869 s->block_index[2]+=2;
870 s->block_index[3]+=2;
873 s->dest[0]+= 2*block_size;
874 s->dest[1]+= block_size;
875 s->dest[2]+= block_size;
878 static inline int get_bits_diff(MpegEncContext *s){
879 const int bits= put_bits_count(&s->pb);
880 const int last= s->last_bits;
887 static inline int ff_h263_round_chroma(int x){
888 static const uint8_t h263_chroma_roundtab[16] = {
889 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
890 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
892 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
896 void ff_estimate_p_frame_motion(MpegEncContext * s,
898 void ff_estimate_b_frame_motion(MpegEncContext * s,
900 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
901 void ff_fix_long_p_mvs(MpegEncContext * s);
902 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
903 int16_t (*mv_table)[2], int f_code, int type, int truncate);
904 int ff_init_me(MpegEncContext *s);
905 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
906 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
907 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
908 int ref_mv_scale, int size, int h);
909 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
910 int ref_index, int size, int h, int add_rate);
913 extern const uint8_t ff_mpeg1_dc_scale_table[128];
914 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
916 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
917 void ff_mpeg1_encode_mb(MpegEncContext *s,
918 int16_t block[6][64],
919 int motion_x, int motion_y);
920 void ff_mpeg1_encode_init(MpegEncContext *s);
921 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
923 extern const uint8_t ff_aic_dc_scale_table[32];
924 extern const uint8_t ff_h263_chroma_qscale_table[32];
927 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
928 int ff_rv_decode_dc(MpegEncContext *s, int n);
929 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
933 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
934 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
935 void ff_msmpeg4_encode_mb(MpegEncContext * s,
936 int16_t block[6][64],
937 int motion_x, int motion_y);
938 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
939 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
940 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
941 void ff_msmpeg4_encode_init(MpegEncContext *s);
942 int ff_wmv2_decode_picture_header(MpegEncContext * s);
943 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
944 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
945 void ff_mspel_motion(MpegEncContext *s,
946 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
947 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
948 int motion_x, int motion_y, int h);
949 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
950 void ff_wmv2_encode_mb(MpegEncContext * s,
951 int16_t block[6][64],
952 int motion_x, int motion_y);
954 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
955 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
956 void ff_free_picture_tables(Picture *pic);
959 #endif /* AVCODEC_MPEGVIDEO_H */