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
35 #include "ratecontrol.h"
37 #include "mpeg12data.h"
39 #include "libavutil/timecode.h"
41 #include "libavutil/opt.h"
43 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
53 #define MPEG_BUF_SIZE (16 * 1024)
55 #define QMAT_SHIFT_MMX 16
61 #define MAX_THREADS 32
63 #define MAX_PICTURE_COUNT 34
65 #define ME_MAP_SIZE 64
66 #define ME_MAP_SHIFT 3
67 #define ME_MAP_MV_BITS 11
69 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
71 #define INPLACE_OFFSET 16
74 #define SEQ_END_CODE 0x000001b7
75 #define SEQ_START_CODE 0x000001b3
76 #define GOP_START_CODE 0x000001b8
77 #define PICTURE_START_CODE 0x00000100
78 #define SLICE_MIN_START_CODE 0x00000101
79 #define SLICE_MAX_START_CODE 0x000001af
80 #define EXT_START_CODE 0x000001b5
81 #define USER_START_CODE 0x000001b2
84 * Value of Picture.reference when Picture is not a reference picture, but
85 * is held for delayed output.
87 #define DELAYED_PIC_REF 4
89 struct MpegEncContext;
94 typedef struct Picture{
98 * halfpel luma planes.
100 uint8_t *interpolated[3];
101 int8_t *qscale_table_base;
102 int16_t (*motion_val_base[2])[2];
103 uint32_t *mb_type_base;
104 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
105 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
106 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
107 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
108 #define IS_INTRA(a) ((a)&7)
109 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
110 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
111 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
112 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
113 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
114 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
115 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
116 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
117 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
118 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
119 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
120 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
121 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
122 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
123 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
124 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
125 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
126 #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
127 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
129 int field_poc[2]; ///< h264 top/bottom POC
130 int poc; ///< h264 frame POC
131 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
132 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
133 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
134 pic_num & max_pic_num; long -> long_pic_num) */
135 int long_ref; ///< 1->long term reference 0->short term reference
136 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
137 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
138 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
139 int field_picture; ///< whether or not the picture was encoded in separate fields
140 int sync; ///< has been decoded after a keyframe
142 int mb_var_sum; ///< sum of MB variance for current frame
143 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
144 uint16_t *mb_var; ///< Table for MB variances
145 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
146 uint8_t *mb_mean; ///< Table for MB luminance
147 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
148 int b_frame_score; /* */
149 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
150 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
154 * Motion estimation context.
156 typedef struct MotionEstContext{
157 AVCodecContext *avctx;
158 int skip; ///< set if ME is skipped for the current MB
159 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
160 int direct_basis_mv[4][2];
161 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
166 uint32_t *map; ///< map to avoid duplicate evaluations
167 uint32_t *score_map; ///< map to store the scores
168 unsigned map_generation;
169 int pre_penalty_factor;
170 int penalty_factor; /**< an estimate of the bits required to
171 code a given mv value, e.g. (1,0) takes
172 more bits than (0,0). We have to
173 estimate whether any reduction in
174 residual is worth the extra bits. */
175 int sub_penalty_factor;
176 int mb_penalty_factor;
180 int pre_pass; ///< = 1 for the pre pass
192 /* temp variables for picture complexity calculation */
193 int mc_mb_var_sum_temp;
195 int scene_change_score;
196 /* cmp, chroma_cmp;*/
197 op_pixels_func (*hpel_put)[4];
198 op_pixels_func (*hpel_avg)[4];
199 qpel_mc_func (*qpel_put)[16];
200 qpel_mc_func (*qpel_avg)[16];
201 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
202 uint8_t *current_mv_penalty;
203 int (*sub_motion_search)(struct MpegEncContext * s,
204 int *mx_ptr, int *my_ptr, int dmin,
205 int src_index, int ref_index,
212 typedef struct MpegEncContext {
214 struct AVCodecContext *avctx;
215 /* the following parameters must be initialized before encoding */
216 int width, height;///< picture size. must be a multiple of 16
218 int intra_only; ///< if true, only intra pictures are generated
219 int bit_rate; ///< wanted bit rate
220 enum OutputFormat out_format; ///< output format
221 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
222 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
224 /* the following codec id fields are deprecated in favor of codec_id */
225 int h263_plus; ///< h263 plus headers
226 int h263_flv; ///< use flv h263 header
228 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
229 int fixed_qscale; ///< fixed qscale if non zero
230 int encoding; ///< true if we are encoding (vs decoding)
231 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
232 int flags2; ///< AVCodecContext.flags2
233 int max_b_frames; ///< max number of b-frames for encoding
234 int luma_elim_threshold;
235 int chroma_elim_threshold;
236 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
237 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
238 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
239 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
240 /* the following fields are managed internally by the encoder */
242 /* sequence parameters */
243 int context_initialized;
244 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
245 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
246 int picture_number; //FIXME remove, unclear definition
247 int picture_in_gop_number; ///< 0-> first pic in gop, ...
248 int mb_width, mb_height; ///< number of MBs horizontally & vertically
249 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
250 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
251 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
252 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
253 int mb_num; ///< number of MBs of a picture
254 int linesize; ///< line size, in bytes, may be different from width
255 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
256 Picture *picture; ///< main picture buffer
257 Picture **input_picture; ///< next pictures on display order for encoding
258 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
260 int y_dc_scale, c_dc_scale;
262 int block_last_index[12]; ///< last non zero coefficient in block
263 int h263_aic; ///< Advanded INTRA Coding (AIC)
266 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
267 ScanTable intra_scantable;
268 ScanTable intra_h_scantable;
269 ScanTable intra_v_scantable;
271 /* WARNING: changes above this line require updates to hardcoded
272 * offsets used in asm. */
274 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
276 * pts difference between the first and second input frame, used for
277 * calculating dts of the first frame when there's a delay */
280 * reordered pts to be used as dts for the next output frame when there's
282 int64_t reordered_pts;
287 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
288 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
289 struct MpegEncContext *thread_context[MAX_THREADS];
290 int slice_context_count; ///< number of used thread_contexts
293 * copy of the previous picture structure.
294 * note, linesize & data, might not match the previous picture (for field pictures)
296 Picture last_picture;
299 * copy of the next picture structure.
300 * note, linesize & data, might not match the next picture (for field pictures)
302 Picture next_picture;
305 * copy of the source picture structure for encoding.
306 * note, linesize & data, might not match the source picture (for field pictures)
311 * copy of the current picture structure.
312 * note, linesize & data, might not match the current picture (for field pictures)
314 Picture current_picture; ///< buffer to store the decompressed current picture
316 Picture *last_picture_ptr; ///< pointer to the previous picture.
317 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
318 Picture *current_picture_ptr; ///< pointer to the current picture
319 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
320 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
321 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
322 int last_dc[3]; ///< last DC values for MPEG1
323 int16_t *dc_val_base;
324 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
325 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
326 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
327 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
328 uint8_t *coded_block_base;
329 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
330 int16_t (*ac_val_base)[16];
331 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
332 int mb_skipped; ///< MUST BE SET only during DECODING
333 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
334 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
335 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
336 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
337 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
338 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
339 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
340 uint8_t *obmc_scratchpad;
341 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
344 int chroma_qscale; ///< chroma QP
345 unsigned int lambda; ///< lagrange multipler used in rate distortion
346 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
348 int adaptive_quant; ///< use adaptive quantization
349 int dquant; ///< qscale difference to prev qscale
350 int closed_gop; ///< MPEG1/2 GOP is closed
351 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
353 int last_pict_type; //FIXME removes
354 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
356 int frame_rate_index;
357 AVRational mpeg2_frame_rate_ext;
358 int last_lambda_for[5]; ///< last lambda for a specific pict type
359 int skipdct; ///< skip dct and code zero residual
361 /* motion compensation */
362 int unrestricted_mv; ///< mv can point outside of the coded picture
363 int h263_long_vectors; ///< use horrible h263v1 long vector mode
365 DSPContext dsp; ///< pointers for accelerated dsp functions
366 int f_code; ///< forward MV resolution
367 int b_code; ///< backward MV resolution for B Frames (mpeg4)
368 int16_t (*p_mv_table_base)[2];
369 int16_t (*b_forw_mv_table_base)[2];
370 int16_t (*b_back_mv_table_base)[2];
371 int16_t (*b_bidir_forw_mv_table_base)[2];
372 int16_t (*b_bidir_back_mv_table_base)[2];
373 int16_t (*b_direct_mv_table_base)[2];
374 int16_t (*p_field_mv_table_base[2][2])[2];
375 int16_t (*b_field_mv_table_base[2][2][2])[2];
376 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
377 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
378 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
379 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
380 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
381 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
382 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
383 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
384 uint8_t (*p_field_select_table[2]);
385 uint8_t (*b_field_select_table[2][2]);
386 int me_method; ///< ME algorithm
388 #define MV_DIR_FORWARD 1
389 #define MV_DIR_BACKWARD 2
390 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
392 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
393 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
394 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
395 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
396 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
397 /**motion vectors for a macroblock
398 first coordinate : 0 = forward 1 = backward
399 second " : depend on type
400 third " : 0 = x, 1 = y
403 int field_select[2][2];
404 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
405 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
406 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
410 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
411 for b-frames rounding mode is always 0 */
413 /* macroblock layer */
417 uint16_t *mb_type; ///< Table for candidate MB types for encoding
418 #define CANDIDATE_MB_TYPE_INTRA 0x01
419 #define CANDIDATE_MB_TYPE_INTER 0x02
420 #define CANDIDATE_MB_TYPE_INTER4V 0x04
421 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
422 //#define MB_TYPE_GMC 0x10
424 #define CANDIDATE_MB_TYPE_DIRECT 0x10
425 #define CANDIDATE_MB_TYPE_FORWARD 0x20
426 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
427 #define CANDIDATE_MB_TYPE_BIDIR 0x80
429 #define CANDIDATE_MB_TYPE_INTER_I 0x100
430 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
431 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
432 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
434 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
436 int block_index[6]; ///< index to current MB in block based arrays with edges
440 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
442 /** matrix transmitted in the bitstream */
443 uint16_t intra_matrix[64];
444 uint16_t chroma_intra_matrix[64];
445 uint16_t inter_matrix[64];
446 uint16_t chroma_inter_matrix[64];
447 #define QUANT_BIAS_SHIFT 8
448 int intra_quant_bias; ///< bias for the quantizer
449 int inter_quant_bias; ///< bias for the quantizer
450 int min_qcoeff; ///< minimum encodable coefficient
451 int max_qcoeff; ///< maximum encodable coefficient
452 int ac_esc_length; ///< num of bits needed to encode the longest esc
453 uint8_t *intra_ac_vlc_length;
454 uint8_t *intra_ac_vlc_last_length;
455 uint8_t *inter_ac_vlc_length;
456 uint8_t *inter_ac_vlc_last_length;
457 uint8_t *luma_dc_vlc_length;
458 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
462 /** precomputed matrix (combine qscale and DCT renorm) */
463 int (*q_intra_matrix)[64];
464 int (*q_chroma_intra_matrix)[64];
465 int (*q_inter_matrix)[64];
466 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
467 uint16_t (*q_intra_matrix16)[2][64];
468 uint16_t (*q_chroma_intra_matrix16)[2][64];
469 uint16_t (*q_inter_matrix16)[2][64];
471 /* noise reduction */
472 int (*dct_error_sum)[64];
474 uint16_t (*dct_offset)[64];
476 void *opaque; ///< private data for the user
478 /* bit rate control */
480 int frame_bits; ///< bits used for the current frame
481 int stuffing_bits; ///< bits used for stuffing
482 int next_lambda; ///< next lambda used for retrying to encode a frame
483 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
485 /* statistics, used for 2-pass encoding */
494 int misc_bits; ///< cbp, mb_type
495 int last_bits; ///< temp var used for calculating the above vars
497 /* error concealment / resync */
498 int error_count, error_occurred;
499 uint8_t *error_status_table; ///< table of the error status of each MB
500 #define VP_START 1 ///< current MB is the first after a resync marker
501 #define ER_AC_ERROR 2
502 #define ER_DC_ERROR 4
503 #define ER_MV_ERROR 8
508 #define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
509 #define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
511 int resync_mb_x; ///< x position of last resync marker
512 int resync_mb_y; ///< y position of last resync marker
513 GetBitContext last_resync_gb; ///< used to search for the next resync marker
514 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
515 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
518 ParseContext parse_context;
522 int obmc; ///< overlapped block motion compensation
523 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
524 int mb_info; ///< interval for outputting info about mb offsets as side data
525 int prev_mb_info, last_mb_info;
526 uint8_t *mb_info_ptr;
529 /* H.263+ specific */
530 int umvplus; ///< == H263+ && unrestricted_mv
531 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
532 int h263_slice_structured;
533 int alt_inter_vlc; ///< alternative inter vlc
539 int time_increment_bits; ///< number of bits to represent the fractional part of time
541 int time_base; ///< time in seconds of last I,P,S Frame
542 int64_t time; ///< time of current frame
543 int64_t last_non_b_time;
544 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
545 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
546 uint16_t pp_field_time;
547 uint16_t pb_field_time; ///< like above, just for interlaced
549 int vol_sprite_usage;
554 int sprite_brightness_change;
555 int num_sprite_warping_points;
556 int real_sprite_warping_points;
557 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
558 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
559 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
560 int sprite_shift[2]; ///< sprite shift [isChroma]
563 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
566 int enhancement_type;
569 int aspect_ratio_info; //FIXME remove
570 int sprite_warping_accuracy;
571 int low_latency_sprite;
572 int data_partitioning; ///< data partitioning flag from header
573 int partitioned_frame; ///< is current frame partitioned
574 int rvlc; ///< reversible vlc
575 int resync_marker; ///< could this stream contain resync markers
576 int low_delay; ///< no reordering needed / has no b-frames
578 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
579 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
580 int use_intra_dc_vlc;
581 PutBitContext tex_pb; ///< used for data partitioned VOPs
582 PutBitContext pb2; ///< used for data partitioned VOPs
584 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
585 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
586 int cplx_estimation_trash_i;
587 int cplx_estimation_trash_p;
588 int cplx_estimation_trash_b;
590 /* divx specific, used to workaround (many) bugs in divx5 */
594 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
595 int bitstream_buffer_size;
596 unsigned int allocated_bitstream_buffer_size;
600 /* lavc specific stuff, used to workaround bugs in libavcodec */
604 int rv10_version; ///< RV10 version: 0 or 3
605 int rv10_first_dc_coded[3];
606 int orig_width, orig_height;
609 struct MJpegContext *mjpeg_ctx;
610 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
611 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
614 /* MSMPEG4 specific */
617 int rl_chroma_table_index;
619 int use_skip_mb_code;
620 int slice_height; ///< in macroblocks
621 int first_slice_line; ///< used in mpeg4 too to handle resync markers
622 int flipflop_rounding;
623 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
625 int esc3_level_length;
627 /** [mb_intra][isChroma][level][run][last] */
628 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
629 int inter_intra_pred;
632 /* decompression specific */
636 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
637 int last_mv_dir; ///< last mv_dir, used for b frame encoding
638 int broken_link; ///< no_output_of_prior_pics_flag
639 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
641 /* MPEG-2-specific - I wished not to have to support this mess. */
642 int progressive_sequence;
643 int mpeg_f_code[2][2];
644 int picture_structure;
646 #define PICT_TOP_FIELD 1
647 #define PICT_BOTTOM_FIELD 2
650 int intra_dc_precision;
651 int frame_pred_frame_dct;
653 int concealment_motion_vectors;
655 int intra_vlc_format;
657 int repeat_first_field;
663 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
666 int progressive_frame;
670 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
671 int drop_frame_timecode; ///< timecode is in drop frame format.
672 int scan_offset; ///< reserve space for SVCD scan offset user data.
677 char *tc_opt_str; ///< timecode option string
678 AVTimecode tc; ///< timecode context
680 uint8_t *ptr_lastgob;
681 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
682 DCTELEM (*pblocks[12])[64];
684 DCTELEM (*block)[64]; ///< points to one of the following blocks
685 DCTELEM (*blocks)[12][64]; // for HQ mode we need to keep the best block
686 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
688 #define SLICE_ERROR -1
689 #define SLICE_END -2 ///<end marker found
690 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
692 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
693 DCTELEM *block/*align 16*/, int n, int qscale);
694 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
695 DCTELEM *block/*align 16*/, int n, int qscale);
696 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
697 DCTELEM *block/*align 16*/, int n, int qscale);
698 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
699 DCTELEM *block/*align 16*/, int n, int qscale);
700 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
701 DCTELEM *block/*align 16*/, int n, int qscale);
702 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
703 DCTELEM *block/*align 16*/, int n, int qscale);
704 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
705 DCTELEM *block/*align 16*/, int n, int qscale);
706 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
707 DCTELEM *block/*align 16*/, int n, int qscale);
708 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
709 DCTELEM *block/*align 16*/, int n, int qscale);
710 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
711 DCTELEM *block/*align 16*/, int n, int qscale);
712 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
713 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
714 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
716 int mpv_flags; ///< flags set by private options
717 int quantizer_noise_shaping;
719 /* error resilience stuff */
720 uint8_t *er_temp_buffer;
722 /* temp buffers for rate control */
723 float *cplx_tab, *bits_tab;
725 /* flag to indicate a reinitialization is required, e.g. after
726 * a frame size change */
730 #define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \
731 (pic >= old_ctx->picture && pic < old_ctx->picture+old_ctx->picture_count ?\
732 &new_ctx->picture[pic - old_ctx->picture] : pic - (Picture*)old_ctx + (Picture*)new_ctx)\
735 /* mpegvideo_enc common options */
736 #define FF_MPV_FLAG_SKIP_RD 0x0001
737 #define FF_MPV_FLAG_STRICT_GOP 0x0002
738 #define FF_MPV_FLAG_QP_RD 0x0004
739 #define FF_MPV_FLAG_CBP_RD 0x0008
741 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
742 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
743 #define FF_MPV_COMMON_OPTS \
744 { "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" },\
745 { "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" },\
746 { "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" },\
747 { "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" },\
748 { "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" },\
749 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
750 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
751 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
752 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
753 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
755 extern const AVOption ff_mpv_generic_options[];
757 #define FF_MPV_GENERIC_CLASS(name) \
758 static const AVClass name ## _class = {\
759 .class_name = #name " encoder",\
760 .item_name = av_default_item_name,\
761 .option = ff_mpv_generic_options,\
762 .version = LIBAVUTIL_VERSION_INT,\
766 * Set the given MpegEncContext to common defaults (same for encoding
767 * and decoding). The changed fields will not depend upon the prior
768 * state of the MpegEncContext.
770 void ff_MPV_common_defaults(MpegEncContext *s);
772 void ff_MPV_decode_defaults(MpegEncContext *s);
773 int ff_MPV_common_init(MpegEncContext *s);
774 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
775 int ff_MPV_common_frame_size_change(MpegEncContext *s);
776 void ff_MPV_common_end(MpegEncContext *s);
777 void ff_MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
778 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
779 void ff_MPV_frame_end(MpegEncContext *s);
780 int ff_MPV_encode_init(AVCodecContext *avctx);
781 int ff_MPV_encode_end(AVCodecContext *avctx);
782 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
783 AVFrame *frame, int *got_packet);
784 void ff_dct_encode_init_x86(MpegEncContext *s);
785 void ff_MPV_common_init_x86(MpegEncContext *s);
786 void ff_MPV_common_init_axp(MpegEncContext *s);
787 void ff_MPV_common_init_arm(MpegEncContext *s);
788 void ff_MPV_common_init_altivec(MpegEncContext *s);
789 void ff_MPV_common_init_bfin(MpegEncContext *s);
790 void ff_clean_intra_table_entries(MpegEncContext *s);
791 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
792 void ff_mpeg_flush(AVCodecContext *avctx);
793 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
794 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
795 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
796 int ff_find_unused_picture(MpegEncContext *s, int shared);
797 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
798 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
799 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
800 void ff_MPV_report_decode_progress(MpegEncContext *s);
801 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
802 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
803 void ff_set_qscale(MpegEncContext * s, int qscale);
805 void ff_er_frame_start(MpegEncContext *s);
806 void ff_er_frame_end(MpegEncContext *s);
807 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
809 int ff_dct_common_init(MpegEncContext *s);
810 int ff_dct_encode_init(MpegEncContext *s);
811 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
812 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
813 int ff_dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
815 void ff_init_block_index(MpegEncContext *s);
816 void ff_copy_picture(Picture *dst, Picture *src);
818 void ff_MPV_motion(MpegEncContext *s,
819 uint8_t *dest_y, uint8_t *dest_cb,
820 uint8_t *dest_cr, int dir,
821 uint8_t **ref_picture,
822 op_pixels_func (*pix_op)[4],
823 qpel_mc_func (*qpix_op)[16]);
826 * Allocate a Picture.
827 * The pixels are allocated/set by calling get_buffer() if shared = 0.
829 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
831 extern const enum AVPixelFormat ff_pixfmt_list_420[];
832 extern const enum AVPixelFormat ff_hwaccel_pixfmt_list_420[];
834 static inline void ff_update_block_index(MpegEncContext *s){
835 const int block_size= 8 >> s->avctx->lowres;
837 s->block_index[0]+=2;
838 s->block_index[1]+=2;
839 s->block_index[2]+=2;
840 s->block_index[3]+=2;
843 s->dest[0]+= 2*block_size;
844 s->dest[1]+= block_size;
845 s->dest[2]+= block_size;
848 static inline int get_bits_diff(MpegEncContext *s){
849 const int bits= put_bits_count(&s->pb);
850 const int last= s->last_bits;
857 static inline int ff_h263_round_chroma(int x){
858 static const uint8_t h263_chroma_roundtab[16] = {
859 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
860 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
862 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
866 void ff_estimate_p_frame_motion(MpegEncContext * s,
868 void ff_estimate_b_frame_motion(MpegEncContext * s,
870 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
871 void ff_fix_long_p_mvs(MpegEncContext * s);
872 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
873 int16_t (*mv_table)[2], int f_code, int type, int truncate);
874 int ff_init_me(MpegEncContext *s);
875 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
876 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
877 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
878 int ref_mv_scale, int size, int h);
879 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
880 int ref_index, int size, int h, int add_rate);
883 extern const uint8_t ff_mpeg1_dc_scale_table[128];
884 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
886 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
887 void ff_mpeg1_encode_mb(MpegEncContext *s,
888 DCTELEM block[6][64],
889 int motion_x, int motion_y);
890 void ff_mpeg1_encode_init(MpegEncContext *s);
891 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
892 void ff_mpeg1_clean_buffers(MpegEncContext *s);
893 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
895 extern const uint8_t ff_aic_dc_scale_table[32];
896 extern const uint8_t ff_h263_chroma_qscale_table[32];
897 extern const uint8_t ff_h263_loop_filter_strength[32];
900 void ff_h261_loop_filter(MpegEncContext *s);
901 void ff_h261_reorder_mb_index(MpegEncContext* s);
902 void ff_h261_encode_mb(MpegEncContext *s,
903 DCTELEM block[6][64],
904 int motion_x, int motion_y);
905 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
906 void ff_h261_encode_init(MpegEncContext *s);
907 int ff_h261_get_picture_format(int width, int height);
911 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
912 int ff_rv_decode_dc(MpegEncContext *s, int n);
913 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
917 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
918 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
919 void ff_msmpeg4_encode_mb(MpegEncContext * s,
920 DCTELEM block[6][64],
921 int motion_x, int motion_y);
922 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
923 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
924 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
925 void ff_msmpeg4_encode_init(MpegEncContext *s);
926 int ff_wmv2_decode_picture_header(MpegEncContext * s);
927 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
928 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
929 void ff_mspel_motion(MpegEncContext *s,
930 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
931 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
932 int motion_x, int motion_y, int h);
933 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
934 void ff_wmv2_encode_mb(MpegEncContext * s,
935 DCTELEM block[6][64],
936 int motion_x, int motion_y);
938 #endif /* AVCODEC_MPEGVIDEO_H */