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"
37 #include "ratecontrol.h"
39 #include "mpeg12data.h"
43 #include "libavutil/opt.h"
44 #include "libavutil/timecode.h"
46 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
56 #define MPEG_BUF_SIZE (16 * 1024)
58 #define QMAT_SHIFT_MMX 16
64 #define MAX_THREADS 32
65 #define MAX_PICTURE_COUNT 36
67 #define ME_MAP_SIZE 64
68 #define ME_MAP_SHIFT 3
69 #define ME_MAP_MV_BITS 11
71 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
73 #define INPLACE_OFFSET 16
76 #define SEQ_END_CODE 0x000001b7
77 #define SEQ_START_CODE 0x000001b3
78 #define GOP_START_CODE 0x000001b8
79 #define PICTURE_START_CODE 0x00000100
80 #define SLICE_MIN_START_CODE 0x00000101
81 #define SLICE_MAX_START_CODE 0x000001af
82 #define EXT_START_CODE 0x000001b5
83 #define USER_START_CODE 0x000001b2
86 * Value of Picture.reference when Picture is not a reference picture, but
87 * is held for delayed output.
89 #define DELAYED_PIC_REF 4
91 struct MpegEncContext;
96 typedef struct Picture{
99 int8_t *qscale_table_base;
100 int16_t (*motion_val_base[2])[2];
101 uint32_t *mb_type_base;
102 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
103 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
104 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
105 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
106 #define IS_INTRA(a) ((a)&7)
107 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
108 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
109 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
110 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
111 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
112 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
113 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
114 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
115 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
116 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
117 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
118 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
119 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
120 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
121 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
122 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
123 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
124 #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
125 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
127 int field_poc[2]; ///< h264 top/bottom POC
128 int poc; ///< h264 frame POC
129 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
130 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
131 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
132 pic_num & max_pic_num; long -> long_pic_num) */
133 int long_ref; ///< 1->long term reference 0->short term reference
134 int ref_poc[2][2][32]; ///< h264 POCs of the frames/fields used as reference (FIXME need per slice)
135 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
136 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
137 int field_picture; ///< whether or not the picture was encoded in separate fields
138 int sync; ///< has been decoded after a keyframe
140 int mb_var_sum; ///< sum of MB variance for current frame
141 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
142 uint16_t *mb_var; ///< Table for MB variances
143 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
144 uint8_t *mb_mean; ///< Table for MB luminance
145 int b_frame_score; /* */
146 void *owner2; ///< pointer to the context that allocated this picture
147 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
148 int period_since_free; ///< "cycles" since this Picture has been freed
152 * Motion estimation context.
154 typedef struct MotionEstContext{
155 AVCodecContext *avctx;
156 int skip; ///< set if ME is skipped for the current MB
157 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
158 int direct_basis_mv[4][2];
159 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
164 uint32_t *map; ///< map to avoid duplicate evaluations
165 uint32_t *score_map; ///< map to store the scores
166 unsigned map_generation;
167 int pre_penalty_factor;
168 int penalty_factor; /**< an estimate of the bits required to
169 code a given mv value, e.g. (1,0) takes
170 more bits than (0,0). We have to
171 estimate whether any reduction in
172 residual is worth the extra bits. */
173 int sub_penalty_factor;
174 int mb_penalty_factor;
178 int pre_pass; ///< = 1 for the pre pass
190 /* temp variables for picture complexity calculation */
191 int mc_mb_var_sum_temp;
193 int scene_change_score;
194 /* cmp, chroma_cmp;*/
195 op_pixels_func (*hpel_put)[4];
196 op_pixels_func (*hpel_avg)[4];
197 qpel_mc_func (*qpel_put)[16];
198 qpel_mc_func (*qpel_avg)[16];
199 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
200 uint8_t *current_mv_penalty;
201 int (*sub_motion_search)(struct MpegEncContext * s,
202 int *mx_ptr, int *my_ptr, int dmin,
203 int src_index, int ref_index,
210 typedef struct MpegEncContext {
212 struct AVCodecContext *avctx;
213 /* the following parameters must be initialized before encoding */
214 int width, height;///< picture size. must be a multiple of 16
216 int intra_only; ///< if true, only intra pictures are generated
217 int bit_rate; ///< wanted bit rate
218 enum OutputFormat out_format; ///< output format
219 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
220 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
222 /* the following codec id fields are deprecated in favor of codec_id */
223 int h263_plus; ///< h263 plus headers
224 int h263_flv; ///< use flv h263 header
226 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
227 int fixed_qscale; ///< fixed qscale if non zero
228 int encoding; ///< true if we are encoding (vs decoding)
229 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
230 int flags2; ///< AVCodecContext.flags2
231 int max_b_frames; ///< max number of b-frames for encoding
232 int luma_elim_threshold;
233 int chroma_elim_threshold;
234 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
235 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
236 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
237 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
238 /* the following fields are managed internally by the encoder */
240 /* sequence parameters */
241 int context_initialized;
242 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
243 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
244 int picture_number; //FIXME remove, unclear definition
245 int picture_in_gop_number; ///< 0-> first pic in gop, ...
246 int mb_width, mb_height; ///< number of MBs horizontally & vertically
247 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
248 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
249 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
250 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
251 int mb_num; ///< number of MBs of a picture
252 int linesize; ///< line size, in bytes, may be different from width
253 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
254 Picture *picture; ///< main picture buffer
255 Picture **input_picture; ///< next pictures on display order for encoding
256 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
258 int y_dc_scale, c_dc_scale;
260 int block_last_index[12]; ///< last non zero coefficient in block
261 int h263_aic; ///< Advanded INTRA Coding (AIC)
264 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
265 ScanTable intra_scantable;
266 ScanTable intra_h_scantable;
267 ScanTable intra_v_scantable;
269 /* WARNING: changes above this line require updates to hardcoded
270 * offsets used in asm. */
272 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
274 * pts difference between the first and second input frame, used for
275 * calculating dts of the first frame when there's a delay */
278 * reordered pts to be used as dts for the next output frame when there's
280 int64_t reordered_pts;
285 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
286 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
287 struct MpegEncContext *thread_context[MAX_THREADS];
288 int slice_context_count; ///< number of used thread_contexts
291 * copy of the previous picture structure.
292 * note, linesize & data, might not match the previous picture (for field pictures)
294 Picture last_picture;
297 * copy of the next picture structure.
298 * note, linesize & data, might not match the next picture (for field pictures)
300 Picture next_picture;
303 * copy of the source picture structure for encoding.
304 * note, linesize & data, might not match the source picture (for field pictures)
309 * copy of the current picture structure.
310 * note, linesize & data, might not match the current picture (for field pictures)
312 Picture current_picture; ///< buffer to store the decompressed current picture
314 Picture *last_picture_ptr; ///< pointer to the previous picture.
315 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
316 Picture *current_picture_ptr; ///< pointer to the current picture
317 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
318 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
319 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
320 int last_dc[3]; ///< last DC values for MPEG1
321 int16_t *dc_val_base;
322 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
323 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
324 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
325 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
326 uint8_t *coded_block_base;
327 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
328 int16_t (*ac_val_base)[16];
329 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
330 int mb_skipped; ///< MUST BE SET only during DECODING
331 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
332 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
333 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
334 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
335 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
336 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
337 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
338 uint8_t *obmc_scratchpad;
339 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
342 int chroma_qscale; ///< chroma QP
343 unsigned int lambda; ///< lagrange multipler used in rate distortion
344 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
346 int adaptive_quant; ///< use adaptive quantization
347 int dquant; ///< qscale difference to prev qscale
348 int closed_gop; ///< MPEG1/2 GOP is closed
349 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
351 int last_pict_type; //FIXME removes
352 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
354 int frame_rate_index;
355 AVRational mpeg2_frame_rate_ext;
356 int last_lambda_for[5]; ///< last lambda for a specific pict type
357 int skipdct; ///< skip dct and code zero residual
359 /* motion compensation */
360 int unrestricted_mv; ///< mv can point outside of the coded picture
361 int h263_long_vectors; ///< use horrible h263v1 long vector mode
363 DSPContext dsp; ///< pointers for accelerated dsp functions
364 H264ChromaContext h264chroma;
365 VideoDSPContext vdsp;
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 resync_mb_x; ///< x position of last resync marker
499 int resync_mb_y; ///< y position of last resync marker
500 GetBitContext last_resync_gb; ///< used to search for the next resync marker
501 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
502 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
505 ParseContext parse_context;
509 int obmc; ///< overlapped block motion compensation
510 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
511 int mb_info; ///< interval for outputting info about mb offsets as side data
512 int prev_mb_info, last_mb_info;
513 uint8_t *mb_info_ptr;
516 /* H.263+ specific */
517 int umvplus; ///< == H263+ && unrestricted_mv
518 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
519 int h263_slice_structured;
520 int alt_inter_vlc; ///< alternative inter vlc
526 int time_increment_bits; ///< number of bits to represent the fractional part of time
528 int time_base; ///< time in seconds of last I,P,S Frame
529 int64_t time; ///< time of current frame
530 int64_t last_non_b_time;
531 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
532 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
533 uint16_t pp_field_time;
534 uint16_t pb_field_time; ///< like above, just for interlaced
536 int vol_sprite_usage;
541 int sprite_brightness_change;
542 int num_sprite_warping_points;
543 int real_sprite_warping_points;
544 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
545 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
546 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
547 int sprite_shift[2]; ///< sprite shift [isChroma]
550 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
553 int enhancement_type;
556 int aspect_ratio_info; //FIXME remove
557 int sprite_warping_accuracy;
558 int low_latency_sprite;
559 int data_partitioning; ///< data partitioning flag from header
560 int partitioned_frame; ///< is current frame partitioned
561 int rvlc; ///< reversible vlc
562 int resync_marker; ///< could this stream contain resync markers
563 int low_delay; ///< no reordering needed / has no b-frames
565 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
566 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
567 int use_intra_dc_vlc;
568 PutBitContext tex_pb; ///< used for data partitioned VOPs
569 PutBitContext pb2; ///< used for data partitioned VOPs
571 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
572 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
573 int cplx_estimation_trash_i;
574 int cplx_estimation_trash_p;
575 int cplx_estimation_trash_b;
577 /* divx specific, used to workaround (many) bugs in divx5 */
581 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
582 int bitstream_buffer_size;
583 unsigned int allocated_bitstream_buffer_size;
587 /* lavc specific stuff, used to workaround bugs in libavcodec */
591 int rv10_version; ///< RV10 version: 0 or 3
592 int rv10_first_dc_coded[3];
593 int orig_width, orig_height;
596 struct MJpegContext *mjpeg_ctx;
597 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
598 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
601 /* MSMPEG4 specific */
604 int rl_chroma_table_index;
606 int use_skip_mb_code;
607 int slice_height; ///< in macroblocks
608 int first_slice_line; ///< used in mpeg4 too to handle resync markers
609 int flipflop_rounding;
610 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
612 int esc3_level_length;
614 /** [mb_intra][isChroma][level][run][last] */
615 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
616 int inter_intra_pred;
619 /* decompression specific */
623 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
624 int last_mv_dir; ///< last mv_dir, used for b frame encoding
625 int broken_link; ///< no_output_of_prior_pics_flag
626 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
628 /* MPEG-2-specific - I wished not to have to support this mess. */
629 int progressive_sequence;
630 int mpeg_f_code[2][2];
631 int picture_structure;
633 #define PICT_TOP_FIELD 1
634 #define PICT_BOTTOM_FIELD 2
637 int intra_dc_precision;
638 int frame_pred_frame_dct;
640 int concealment_motion_vectors;
642 int intra_vlc_format;
644 int repeat_first_field;
650 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
653 int progressive_frame;
657 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
658 int drop_frame_timecode; ///< timecode is in drop frame format.
659 int scan_offset; ///< reserve space for SVCD scan offset user data.
664 char *tc_opt_str; ///< timecode option string
665 AVTimecode tc; ///< timecode context
667 uint8_t *ptr_lastgob;
668 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
669 int16_t (*pblocks[12])[64];
671 int16_t (*block)[64]; ///< points to one of the following blocks
672 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
673 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
675 #define SLICE_ERROR -1
676 #define SLICE_END -2 ///<end marker found
677 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
679 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
680 int16_t *block/*align 16*/, int n, int qscale);
681 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
682 int16_t *block/*align 16*/, int n, int qscale);
683 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
684 int16_t *block/*align 16*/, int n, int qscale);
685 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
686 int16_t *block/*align 16*/, int n, int qscale);
687 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
688 int16_t *block/*align 16*/, int n, int qscale);
689 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
690 int16_t *block/*align 16*/, int n, int qscale);
691 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
692 int16_t *block/*align 16*/, int n, int qscale);
693 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
694 int16_t *block/*align 16*/, int n, int qscale);
695 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
696 int16_t *block/*align 16*/, int n, int qscale);
697 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
698 int16_t *block/*align 16*/, int n, int qscale);
699 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
700 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
701 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
703 int mpv_flags; ///< flags set by private options
704 int quantizer_noise_shaping;
706 /* temp buffers for rate control */
707 float *cplx_tab, *bits_tab;
709 /* flag to indicate a reinitialization is required, e.g. after
710 * a frame size change */
716 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
717 ((pic && pic >= old_ctx->picture && \
718 pic < old_ctx->picture + old_ctx->picture_count) ? \
719 &new_ctx->picture[pic - old_ctx->picture] : NULL)
721 /* mpegvideo_enc common options */
722 #define FF_MPV_FLAG_SKIP_RD 0x0001
723 #define FF_MPV_FLAG_STRICT_GOP 0x0002
724 #define FF_MPV_FLAG_QP_RD 0x0004
725 #define FF_MPV_FLAG_CBP_RD 0x0008
727 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
728 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
729 #define FF_MPV_COMMON_OPTS \
730 { "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" },\
731 { "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" },\
732 { "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" },\
733 { "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" },\
734 { "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" },\
735 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
736 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
737 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
738 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
739 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
741 extern const AVOption ff_mpv_generic_options[];
743 #define FF_MPV_GENERIC_CLASS(name) \
744 static const AVClass name ## _class = {\
745 .class_name = #name " encoder",\
746 .item_name = av_default_item_name,\
747 .option = ff_mpv_generic_options,\
748 .version = LIBAVUTIL_VERSION_INT,\
752 * Set the given MpegEncContext to common defaults (same for encoding
753 * and decoding). The changed fields will not depend upon the prior
754 * state of the MpegEncContext.
756 void ff_MPV_common_defaults(MpegEncContext *s);
758 void ff_MPV_decode_defaults(MpegEncContext *s);
759 int ff_MPV_common_init(MpegEncContext *s);
760 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
761 int ff_MPV_common_frame_size_change(MpegEncContext *s);
762 void ff_MPV_common_end(MpegEncContext *s);
763 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
764 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
765 void ff_MPV_frame_end(MpegEncContext *s);
766 int ff_MPV_encode_init(AVCodecContext *avctx);
767 int ff_MPV_encode_end(AVCodecContext *avctx);
768 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
769 AVFrame *frame, int *got_packet);
770 void ff_dct_encode_init_x86(MpegEncContext *s);
771 void ff_MPV_common_init_x86(MpegEncContext *s);
772 void ff_MPV_common_init_axp(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(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
778 Picture *last, int y, int h, int picture_structure,
779 int first_field, int draw_edges, int low_delay,
780 int v_edge_pos, int h_edge_pos);
781 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
782 void ff_mpeg_flush(AVCodecContext *avctx);
783 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
784 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
785 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
786 int ff_find_unused_picture(MpegEncContext *s, int shared);
787 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
788 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
789 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
790 void ff_MPV_report_decode_progress(MpegEncContext *s);
791 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
792 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
793 void ff_set_qscale(MpegEncContext * s, int qscale);
795 void ff_mpeg_er_frame_start(MpegEncContext *s);
797 int ff_dct_common_init(MpegEncContext *s);
798 int ff_dct_encode_init(MpegEncContext *s);
799 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
800 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
801 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
803 void ff_init_block_index(MpegEncContext *s);
804 void ff_copy_picture(Picture *dst, Picture *src);
806 void ff_MPV_motion(MpegEncContext *s,
807 uint8_t *dest_y, uint8_t *dest_cb,
808 uint8_t *dest_cr, int dir,
809 uint8_t **ref_picture,
810 op_pixels_func (*pix_op)[4],
811 qpel_mc_func (*qpix_op)[16]);
814 * Allocate a Picture.
815 * The pixels are allocated/set by calling get_buffer() if shared = 0.
817 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
819 extern const enum AVPixelFormat ff_pixfmt_list_420[];
822 * permute block according to permuatation.
823 * @param last last non zero element in scantable order
825 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
827 static inline void ff_update_block_index(MpegEncContext *s){
828 const int block_size= 8 >> s->avctx->lowres;
830 s->block_index[0]+=2;
831 s->block_index[1]+=2;
832 s->block_index[2]+=2;
833 s->block_index[3]+=2;
836 s->dest[0]+= 2*block_size;
837 s->dest[1]+= block_size;
838 s->dest[2]+= block_size;
841 static inline int get_bits_diff(MpegEncContext *s){
842 const int bits= put_bits_count(&s->pb);
843 const int last= s->last_bits;
850 static inline int ff_h263_round_chroma(int x){
851 static const uint8_t h263_chroma_roundtab[16] = {
852 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
853 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
855 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
859 void ff_estimate_p_frame_motion(MpegEncContext * s,
861 void ff_estimate_b_frame_motion(MpegEncContext * s,
863 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
864 void ff_fix_long_p_mvs(MpegEncContext * s);
865 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
866 int16_t (*mv_table)[2], int f_code, int type, int truncate);
867 int ff_init_me(MpegEncContext *s);
868 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
869 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
870 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
871 int ref_mv_scale, int size, int h);
872 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
873 int ref_index, int size, int h, int add_rate);
876 extern const uint8_t ff_mpeg1_dc_scale_table[128];
877 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
879 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
880 void ff_mpeg1_encode_mb(MpegEncContext *s,
881 int16_t block[6][64],
882 int motion_x, int motion_y);
883 void ff_mpeg1_encode_init(MpegEncContext *s);
884 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
885 void ff_mpeg1_clean_buffers(MpegEncContext *s);
886 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
888 extern const uint8_t ff_aic_dc_scale_table[32];
889 extern const uint8_t ff_h263_chroma_qscale_table[32];
890 extern const uint8_t ff_h263_loop_filter_strength[32];
893 void ff_h261_loop_filter(MpegEncContext *s);
894 void ff_h261_reorder_mb_index(MpegEncContext* s);
895 void ff_h261_encode_mb(MpegEncContext *s,
896 int16_t block[6][64],
897 int motion_x, int motion_y);
898 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
899 void ff_h261_encode_init(MpegEncContext *s);
900 int ff_h261_get_picture_format(int width, int height);
904 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
905 int ff_rv_decode_dc(MpegEncContext *s, int n);
906 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
910 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
911 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
912 void ff_msmpeg4_encode_mb(MpegEncContext * s,
913 int16_t block[6][64],
914 int motion_x, int motion_y);
915 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
916 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
917 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
918 void ff_msmpeg4_encode_init(MpegEncContext *s);
919 int ff_wmv2_decode_picture_header(MpegEncContext * s);
920 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
921 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
922 void ff_mspel_motion(MpegEncContext *s,
923 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
924 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
925 int motion_x, int motion_y, int h);
926 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
927 void ff_wmv2_encode_mb(MpegEncContext * s,
928 int16_t block[6][64],
929 int motion_x, int motion_y);
931 #endif /* AVCODEC_MPEGVIDEO_H */