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 32
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
83 struct MpegEncContext;
88 typedef struct Picture{
92 * halfpel luma planes.
94 uint8_t *interpolated[3];
95 int8_t *qscale_table_base;
96 int16_t (*motion_val_base[2])[2];
97 uint32_t *mb_type_base;
98 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
99 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
100 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
101 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
102 #define IS_INTRA(a) ((a)&7)
103 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
104 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
105 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
106 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
107 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
108 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
109 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
110 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
111 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
112 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
113 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
114 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
115 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
116 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
117 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
118 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
119 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
120 #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
121 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
123 int field_poc[2]; ///< h264 top/bottom POC
124 int poc; ///< h264 frame POC
125 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
126 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
127 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
128 pic_num & max_pic_num; long -> long_pic_num) */
129 int long_ref; ///< 1->long term reference 0->short term reference
130 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
131 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
132 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
133 int field_picture; ///< whether or not the picture was encoded in separate fields
134 int sync; ///< has been decoded after a keyframe
136 int mb_var_sum; ///< sum of MB variance for current frame
137 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
138 uint16_t *mb_var; ///< Table for MB variances
139 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
140 uint8_t *mb_mean; ///< Table for MB luminance
141 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
142 int b_frame_score; /* */
143 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
147 * Motion estimation context.
149 typedef struct MotionEstContext{
150 AVCodecContext *avctx;
151 int skip; ///< set if ME is skipped for the current MB
152 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
153 int direct_basis_mv[4][2];
154 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
159 uint32_t *map; ///< map to avoid duplicate evaluations
160 uint32_t *score_map; ///< map to store the scores
161 unsigned map_generation;
162 int pre_penalty_factor;
163 int penalty_factor; /**< an estimate of the bits required to
164 code a given mv value, e.g. (1,0) takes
165 more bits than (0,0). We have to
166 estimate whether any reduction in
167 residual is worth the extra bits. */
168 int sub_penalty_factor;
169 int mb_penalty_factor;
173 int pre_pass; ///< = 1 for the pre pass
185 /* temp variables for picture complexity calculation */
186 int mc_mb_var_sum_temp;
188 int scene_change_score;
189 /* cmp, chroma_cmp;*/
190 op_pixels_func (*hpel_put)[4];
191 op_pixels_func (*hpel_avg)[4];
192 qpel_mc_func (*qpel_put)[16];
193 qpel_mc_func (*qpel_avg)[16];
194 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
195 uint8_t *current_mv_penalty;
196 int (*sub_motion_search)(struct MpegEncContext * s,
197 int *mx_ptr, int *my_ptr, int dmin,
198 int src_index, int ref_index,
205 typedef struct MpegEncContext {
207 struct AVCodecContext *avctx;
208 /* the following parameters must be initialized before encoding */
209 int width, height;///< picture size. must be a multiple of 16
211 int intra_only; ///< if true, only intra pictures are generated
212 int bit_rate; ///< wanted bit rate
213 enum OutputFormat out_format; ///< output format
214 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
215 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
217 /* the following codec id fields are deprecated in favor of codec_id */
218 int h263_plus; ///< h263 plus headers
219 int h263_flv; ///< use flv h263 header
221 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
222 int fixed_qscale; ///< fixed qscale if non zero
223 int encoding; ///< true if we are encoding (vs decoding)
224 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
225 int flags2; ///< AVCodecContext.flags2
226 int max_b_frames; ///< max number of b-frames for encoding
227 int luma_elim_threshold;
228 int chroma_elim_threshold;
229 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
230 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
231 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
232 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
233 /* the following fields are managed internally by the encoder */
235 /* sequence parameters */
236 int context_initialized;
237 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
238 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
239 int picture_number; //FIXME remove, unclear definition
240 int picture_in_gop_number; ///< 0-> first pic in gop, ...
241 int mb_width, mb_height; ///< number of MBs horizontally & vertically
242 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
243 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
244 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
245 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
246 int mb_num; ///< number of MBs of a picture
247 int linesize; ///< line size, in bytes, may be different from width
248 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
249 Picture *picture; ///< main picture buffer
250 Picture **input_picture; ///< next pictures on display order for encoding
251 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
253 int y_dc_scale, c_dc_scale;
255 int block_last_index[12]; ///< last non zero coefficient in block
256 int h263_aic; ///< Advanded INTRA Coding (AIC)
259 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
260 ScanTable intra_scantable;
261 ScanTable intra_h_scantable;
262 ScanTable intra_v_scantable;
264 /* WARNING: changes above this line require updates to hardcoded
265 * offsets used in asm. */
267 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
269 * pts difference between the first and second input frame, used for
270 * calculating dts of the first frame when there's a delay */
273 * reordered pts to be used as dts for the next output frame when there's
275 int64_t reordered_pts;
280 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
281 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
282 struct MpegEncContext *thread_context[MAX_THREADS];
283 int slice_context_count; ///< number of used thread_contexts
286 * copy of the previous picture structure.
287 * note, linesize & data, might not match the previous picture (for field pictures)
289 Picture last_picture;
292 * copy of the next picture structure.
293 * note, linesize & data, might not match the next picture (for field pictures)
295 Picture next_picture;
298 * copy of the source picture structure for encoding.
299 * note, linesize & data, might not match the source picture (for field pictures)
304 * copy of the current picture structure.
305 * note, linesize & data, might not match the current picture (for field pictures)
307 Picture current_picture; ///< buffer to store the decompressed current picture
309 Picture *last_picture_ptr; ///< pointer to the previous picture.
310 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
311 Picture *current_picture_ptr; ///< pointer to the current picture
312 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
313 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
314 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
315 int last_dc[3]; ///< last DC values for MPEG1
316 int16_t *dc_val_base;
317 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
318 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
319 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
320 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
321 uint8_t *coded_block_base;
322 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
323 int16_t (*ac_val_base)[16];
324 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
325 int mb_skipped; ///< MUST BE SET only during DECODING
326 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
327 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
328 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
329 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
330 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
331 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
332 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
333 uint8_t *obmc_scratchpad;
334 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
337 int chroma_qscale; ///< chroma QP
338 unsigned int lambda; ///< lagrange multipler used in rate distortion
339 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
341 int adaptive_quant; ///< use adaptive quantization
342 int dquant; ///< qscale difference to prev qscale
343 int closed_gop; ///< MPEG1/2 GOP is closed
344 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
345 int last_pict_type; //FIXME removes
346 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
348 int frame_rate_index;
349 int last_lambda_for[5]; ///< last lambda for a specific pict type
350 int skipdct; ///< skip dct and code zero residual
352 /* motion compensation */
353 int unrestricted_mv; ///< mv can point outside of the coded picture
354 int h263_long_vectors; ///< use horrible h263v1 long vector mode
356 DSPContext dsp; ///< pointers for accelerated dsp functions
357 int f_code; ///< forward MV resolution
358 int b_code; ///< backward MV resolution for B Frames (mpeg4)
359 int16_t (*p_mv_table_base)[2];
360 int16_t (*b_forw_mv_table_base)[2];
361 int16_t (*b_back_mv_table_base)[2];
362 int16_t (*b_bidir_forw_mv_table_base)[2];
363 int16_t (*b_bidir_back_mv_table_base)[2];
364 int16_t (*b_direct_mv_table_base)[2];
365 int16_t (*p_field_mv_table_base[2][2])[2];
366 int16_t (*b_field_mv_table_base[2][2][2])[2];
367 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
368 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
369 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
370 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
371 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
372 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
373 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
374 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
375 uint8_t (*p_field_select_table[2]);
376 uint8_t (*b_field_select_table[2][2]);
377 int me_method; ///< ME algorithm
379 #define MV_DIR_FORWARD 1
380 #define MV_DIR_BACKWARD 2
381 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
383 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
384 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
385 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
386 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
387 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
388 /**motion vectors for a macroblock
389 first coordinate : 0 = forward 1 = backward
390 second " : depend on type
391 third " : 0 = x, 1 = y
394 int field_select[2][2];
395 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
396 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
397 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
401 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
402 for b-frames rounding mode is always 0 */
404 /* macroblock layer */
408 uint16_t *mb_type; ///< Table for candidate MB types for encoding
409 #define CANDIDATE_MB_TYPE_INTRA 0x01
410 #define CANDIDATE_MB_TYPE_INTER 0x02
411 #define CANDIDATE_MB_TYPE_INTER4V 0x04
412 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
413 //#define MB_TYPE_GMC 0x10
415 #define CANDIDATE_MB_TYPE_DIRECT 0x10
416 #define CANDIDATE_MB_TYPE_FORWARD 0x20
417 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
418 #define CANDIDATE_MB_TYPE_BIDIR 0x80
420 #define CANDIDATE_MB_TYPE_INTER_I 0x100
421 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
422 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
423 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
425 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
427 int block_index[6]; ///< index to current MB in block based arrays with edges
431 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
433 /** matrix transmitted in the bitstream */
434 uint16_t intra_matrix[64];
435 uint16_t chroma_intra_matrix[64];
436 uint16_t inter_matrix[64];
437 uint16_t chroma_inter_matrix[64];
438 #define QUANT_BIAS_SHIFT 8
439 int intra_quant_bias; ///< bias for the quantizer
440 int inter_quant_bias; ///< bias for the quantizer
441 int min_qcoeff; ///< minimum encodable coefficient
442 int max_qcoeff; ///< maximum encodable coefficient
443 int ac_esc_length; ///< num of bits needed to encode the longest esc
444 uint8_t *intra_ac_vlc_length;
445 uint8_t *intra_ac_vlc_last_length;
446 uint8_t *inter_ac_vlc_length;
447 uint8_t *inter_ac_vlc_last_length;
448 uint8_t *luma_dc_vlc_length;
449 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
453 /** precomputed matrix (combine qscale and DCT renorm) */
454 int (*q_intra_matrix)[64];
455 int (*q_chroma_intra_matrix)[64];
456 int (*q_inter_matrix)[64];
457 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
458 uint16_t (*q_intra_matrix16)[2][64];
459 uint16_t (*q_chroma_intra_matrix16)[2][64];
460 uint16_t (*q_inter_matrix16)[2][64];
462 /* noise reduction */
463 int (*dct_error_sum)[64];
465 uint16_t (*dct_offset)[64];
467 void *opaque; ///< private data for the user
469 /* bit rate control */
471 int frame_bits; ///< bits used for the current frame
472 int stuffing_bits; ///< bits used for stuffing
473 int next_lambda; ///< next lambda used for retrying to encode a frame
474 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
476 /* statistics, used for 2-pass encoding */
485 int misc_bits; ///< cbp, mb_type
486 int last_bits; ///< temp var used for calculating the above vars
488 /* error concealment / resync */
489 int error_count, error_occurred;
490 uint8_t *error_status_table; ///< table of the error status of each MB
491 #define VP_START 1 ///< current MB is the first after a resync marker
492 #define ER_AC_ERROR 2
493 #define ER_DC_ERROR 4
494 #define ER_MV_ERROR 8
499 #define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
500 #define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
502 int resync_mb_x; ///< x position of last resync marker
503 int resync_mb_y; ///< y position of last resync marker
504 GetBitContext last_resync_gb; ///< used to search for the next resync marker
505 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
506 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
509 ParseContext parse_context;
513 int obmc; ///< overlapped block motion compensation
514 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
515 int mb_info; ///< interval for outputting info about mb offsets as side data
516 int prev_mb_info, last_mb_info;
517 uint8_t *mb_info_ptr;
520 /* H.263+ specific */
521 int umvplus; ///< == H263+ && unrestricted_mv
522 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
523 int h263_slice_structured;
524 int alt_inter_vlc; ///< alternative inter vlc
530 int time_increment_bits; ///< number of bits to represent the fractional part of time
532 int time_base; ///< time in seconds of last I,P,S Frame
533 int64_t time; ///< time of current frame
534 int64_t last_non_b_time;
535 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
536 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
537 uint16_t pp_field_time;
538 uint16_t pb_field_time; ///< like above, just for interlaced
540 int vol_sprite_usage;
545 int sprite_brightness_change;
546 int num_sprite_warping_points;
547 int real_sprite_warping_points;
548 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
549 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
550 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
551 int sprite_shift[2]; ///< sprite shift [isChroma]
554 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
557 int enhancement_type;
560 int aspect_ratio_info; //FIXME remove
561 int sprite_warping_accuracy;
562 int low_latency_sprite;
563 int data_partitioning; ///< data partitioning flag from header
564 int partitioned_frame; ///< is current frame partitioned
565 int rvlc; ///< reversible vlc
566 int resync_marker; ///< could this stream contain resync markers
567 int low_delay; ///< no reordering needed / has no b-frames
569 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
570 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
571 int use_intra_dc_vlc;
572 PutBitContext tex_pb; ///< used for data partitioned VOPs
573 PutBitContext pb2; ///< used for data partitioned VOPs
575 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
576 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
577 int cplx_estimation_trash_i;
578 int cplx_estimation_trash_p;
579 int cplx_estimation_trash_b;
581 /* divx specific, used to workaround (many) bugs in divx5 */
585 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
586 int bitstream_buffer_size;
587 unsigned int allocated_bitstream_buffer_size;
591 /* lavc specific stuff, used to workaround bugs in libavcodec */
595 int rv10_version; ///< RV10 version: 0 or 3
596 int rv10_first_dc_coded[3];
597 int orig_width, orig_height;
600 struct MJpegContext *mjpeg_ctx;
601 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
602 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
605 /* MSMPEG4 specific */
608 int rl_chroma_table_index;
610 int use_skip_mb_code;
611 int slice_height; ///< in macroblocks
612 int first_slice_line; ///< used in mpeg4 too to handle resync markers
613 int flipflop_rounding;
614 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
616 int esc3_level_length;
618 /** [mb_intra][isChroma][level][run][last] */
619 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
620 int inter_intra_pred;
623 /* decompression specific */
627 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
628 int last_mv_dir; ///< last mv_dir, used for b frame encoding
629 int broken_link; ///< no_output_of_prior_pics_flag
630 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
632 /* MPEG-2-specific - I wished not to have to support this mess. */
633 int progressive_sequence;
634 int mpeg_f_code[2][2];
635 int picture_structure;
637 #define PICT_TOP_FIELD 1
638 #define PICT_BOTTOM_FIELD 2
641 int intra_dc_precision;
642 int frame_pred_frame_dct;
644 int concealment_motion_vectors;
646 int intra_vlc_format;
648 int repeat_first_field;
654 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
657 int progressive_frame;
661 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
662 int drop_frame_timecode; ///< timecode is in drop frame format.
663 int scan_offset; ///< reserve space for SVCD scan offset user data.
668 char *tc_opt_str; ///< timecode option string
669 AVTimecode tc; ///< timecode context
671 uint8_t *ptr_lastgob;
672 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
673 DCTELEM (*pblocks[12])[64];
675 DCTELEM (*block)[64]; ///< points to one of the following blocks
676 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
677 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
679 #define SLICE_ERROR -1
680 #define SLICE_END -2 ///<end marker found
681 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
683 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
684 DCTELEM *block/*align 16*/, int n, int qscale);
685 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
686 DCTELEM *block/*align 16*/, int n, int qscale);
687 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
688 DCTELEM *block/*align 16*/, int n, int qscale);
689 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
690 DCTELEM *block/*align 16*/, int n, int qscale);
691 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
692 DCTELEM *block/*align 16*/, int n, int qscale);
693 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
694 DCTELEM *block/*align 16*/, int n, int qscale);
695 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
696 DCTELEM *block/*align 16*/, int n, int qscale);
697 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
698 DCTELEM *block/*align 16*/, int n, int qscale);
699 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
700 DCTELEM *block/*align 16*/, int n, int qscale);
701 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
702 DCTELEM *block/*align 16*/, int n, int qscale);
703 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
704 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
705 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
707 int mpv_flags; ///< flags set by private options
708 int quantizer_noise_shaping;
710 /* error resilience stuff */
711 uint8_t *er_temp_buffer;
713 /* temp buffers for rate control */
714 float *cplx_tab, *bits_tab;
717 #define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \
718 (pic >= old_ctx->picture && pic < old_ctx->picture+old_ctx->picture_count ?\
719 &new_ctx->picture[pic - old_ctx->picture] : pic - (Picture*)old_ctx + (Picture*)new_ctx)\
722 /* mpegvideo_enc common options */
723 #define FF_MPV_FLAG_SKIP_RD 0x0001
724 #define FF_MPV_FLAG_STRICT_GOP 0x0002
725 #define FF_MPV_FLAG_QP_RD 0x0004
726 #define FF_MPV_FLAG_CBP_RD 0x0008
728 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
729 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
730 #define FF_MPV_COMMON_OPTS \
731 { "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" },\
732 { "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" },\
733 { "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" },\
734 { "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" },\
735 { "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" },\
736 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
737 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
738 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
739 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
740 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
742 extern const AVOption ff_mpv_generic_options[];
744 #define FF_MPV_GENERIC_CLASS(name) \
745 static const AVClass name ## _class = {\
746 .class_name = #name " encoder",\
747 .item_name = av_default_item_name,\
748 .option = ff_mpv_generic_options,\
749 .version = LIBAVUTIL_VERSION_INT,\
753 * Set the given MpegEncContext to common defaults (same for encoding
754 * and decoding). The changed fields will not depend upon the prior
755 * state of the MpegEncContext.
757 void ff_MPV_common_defaults(MpegEncContext *s);
759 void ff_MPV_decode_defaults(MpegEncContext *s);
760 int ff_MPV_common_init(MpegEncContext *s);
761 void ff_MPV_common_end(MpegEncContext *s);
762 void ff_MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
763 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
764 void ff_MPV_frame_end(MpegEncContext *s);
765 int ff_MPV_encode_init(AVCodecContext *avctx);
766 int ff_MPV_encode_end(AVCodecContext *avctx);
767 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
768 AVFrame *frame, int *got_packet);
769 void ff_MPV_encode_init_x86(MpegEncContext *s);
770 void ff_MPV_common_init_x86(MpegEncContext *s);
771 void ff_MPV_common_init_axp(MpegEncContext *s);
772 void ff_MPV_common_init_mmi(MpegEncContext *s);
773 void ff_MPV_common_init_arm(MpegEncContext *s);
774 void ff_MPV_common_init_altivec(MpegEncContext *s);
775 void ff_MPV_common_init_bfin(MpegEncContext *s);
776 void ff_clean_intra_table_entries(MpegEncContext *s);
777 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
778 void ff_mpeg_flush(AVCodecContext *avctx);
779 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
780 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
781 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
782 int ff_find_unused_picture(MpegEncContext *s, int shared);
783 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
784 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
785 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
786 void ff_MPV_report_decode_progress(MpegEncContext *s);
787 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
788 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
789 void ff_set_qscale(MpegEncContext * s, int qscale);
791 void ff_er_frame_start(MpegEncContext *s);
792 void ff_er_frame_end(MpegEncContext *s);
793 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
795 int ff_dct_common_init(MpegEncContext *s);
796 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
797 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
798 int ff_dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
800 void ff_init_block_index(MpegEncContext *s);
801 void ff_copy_picture(Picture *dst, Picture *src);
803 void ff_MPV_motion(MpegEncContext *s,
804 uint8_t *dest_y, uint8_t *dest_cb,
805 uint8_t *dest_cr, int dir,
806 uint8_t **ref_picture,
807 op_pixels_func (*pix_op)[4],
808 qpel_mc_func (*qpix_op)[16]);
811 * Allocate a Picture.
812 * The pixels are allocated/set by calling get_buffer() if shared = 0.
814 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
816 extern const enum PixelFormat ff_pixfmt_list_420[];
817 extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[];
819 static inline void ff_update_block_index(MpegEncContext *s){
820 const int block_size= 8 >> s->avctx->lowres;
822 s->block_index[0]+=2;
823 s->block_index[1]+=2;
824 s->block_index[2]+=2;
825 s->block_index[3]+=2;
828 s->dest[0]+= 2*block_size;
829 s->dest[1]+= block_size;
830 s->dest[2]+= block_size;
833 static inline int get_bits_diff(MpegEncContext *s){
834 const int bits= put_bits_count(&s->pb);
835 const int last= s->last_bits;
842 static inline int ff_h263_round_chroma(int x){
843 static const uint8_t h263_chroma_roundtab[16] = {
844 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
845 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
847 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
851 void ff_estimate_p_frame_motion(MpegEncContext * s,
853 void ff_estimate_b_frame_motion(MpegEncContext * s,
855 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
856 void ff_fix_long_p_mvs(MpegEncContext * s);
857 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
858 int16_t (*mv_table)[2], int f_code, int type, int truncate);
859 int ff_init_me(MpegEncContext *s);
860 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
861 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
862 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
863 int ref_mv_scale, int size, int h);
864 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
865 int ref_index, int size, int h, int add_rate);
868 extern const uint8_t ff_mpeg1_dc_scale_table[128];
869 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
871 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
872 void ff_mpeg1_encode_mb(MpegEncContext *s,
873 DCTELEM block[6][64],
874 int motion_x, int motion_y);
875 void ff_mpeg1_encode_init(MpegEncContext *s);
876 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
877 void ff_mpeg1_clean_buffers(MpegEncContext *s);
878 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
880 extern const uint8_t ff_aic_dc_scale_table[32];
881 extern const uint8_t ff_h263_chroma_qscale_table[32];
882 extern const uint8_t ff_h263_loop_filter_strength[32];
885 void ff_h261_loop_filter(MpegEncContext *s);
886 void ff_h261_reorder_mb_index(MpegEncContext* s);
887 void ff_h261_encode_mb(MpegEncContext *s,
888 DCTELEM block[6][64],
889 int motion_x, int motion_y);
890 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
891 void ff_h261_encode_init(MpegEncContext *s);
892 int ff_h261_get_picture_format(int width, int height);
896 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
897 int ff_rv_decode_dc(MpegEncContext *s, int n);
898 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
902 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
903 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
904 void ff_msmpeg4_encode_mb(MpegEncContext * s,
905 DCTELEM block[6][64],
906 int motion_x, int motion_y);
907 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
908 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
909 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
910 void ff_msmpeg4_encode_init(MpegEncContext *s);
911 int ff_wmv2_decode_picture_header(MpegEncContext * s);
912 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
913 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
914 void ff_mspel_motion(MpegEncContext *s,
915 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
916 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
917 int motion_x, int motion_y, int h);
918 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
919 void ff_wmv2_encode_mb(MpegEncContext * s,
920 DCTELEM block[6][64],
921 int motion_x, int motion_y);
923 #endif /* AVCODEC_MPEGVIDEO_H */