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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mpegvideo.h
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2ba45a60
DM		 1/*
2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23/**
24 * @file
25 * mpegvideo header.
26 */
27
28#ifndef AVCODEC_MPEGVIDEO_H
29#define AVCODEC_MPEGVIDEO_H
30
31#include "avcodec.h"
32#include "blockdsp.h"
33#include "error_resilience.h"
34#include "fdctdsp.h"
35#include "get_bits.h"
36#include "h264chroma.h"
37#include "h263dsp.h"
38#include "hpeldsp.h"
39#include "idctdsp.h"
40#include "me_cmp.h"
41#include "mpegvideodsp.h"
42#include "mpegvideoencdsp.h"
43#include "pixblockdsp.h"
44#include "put_bits.h"
45#include "ratecontrol.h"
46#include "parser.h"
47#include "mpeg12data.h"
48#include "qpeldsp.h"
49#include "rl.h"
50#include "thread.h"
51#include "videodsp.h"
52
53#include "libavutil/opt.h"
54#include "libavutil/timecode.h"
55
56#define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
57
58enum OutputFormat {
59 FMT_MPEG1,
60 FMT_H261,
61 FMT_H263,
62 FMT_MJPEG,
63};
64
65#define MAX_FCODE 7
66#define MAX_MV 4096
67
68#define MAX_THREADS 32
69#define MAX_PICTURE_COUNT 36
70
71#define MAX_B_FRAMES 16
72
73#define ME_MAP_SIZE 64
74
75#define MAX_MB_BYTES (30*16*16*3/8 + 120)
76
77#define INPLACE_OFFSET 16
78
79#define EDGE_WIDTH 16
80
81/* Start codes. */
82#define SEQ_END_CODE 0x000001b7
83#define SEQ_START_CODE 0x000001b3
84#define GOP_START_CODE 0x000001b8
85#define PICTURE_START_CODE 0x00000100
86#define SLICE_MIN_START_CODE 0x00000101
87#define SLICE_MAX_START_CODE 0x000001af
88#define EXT_START_CODE 0x000001b5
89#define USER_START_CODE 0x000001b2
90
91/* encoding scans */
92extern const uint8_t ff_alternate_horizontal_scan[64];
93extern const uint8_t ff_alternate_vertical_scan[64];
94
95struct MpegEncContext;
96
97/**
98 * Picture.
99 */
100typedef struct Picture{
101 struct AVFrame *f;
102 ThreadFrame tf;
103
104 AVBufferRef *qscale_table_buf;
105 int8_t *qscale_table;
106
107 AVBufferRef *motion_val_buf[2];
108 int16_t (*motion_val[2])[2];
109
110 AVBufferRef *mb_type_buf;
111 uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
112
113 AVBufferRef *mbskip_table_buf;
114 uint8_t *mbskip_table;
115
116 AVBufferRef *ref_index_buf[2];
117 int8_t *ref_index[2];
118
119 AVBufferRef *mb_var_buf;
120 uint16_t *mb_var; ///< Table for MB variances
121
122 AVBufferRef *mc_mb_var_buf;
123 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
124
125 int alloc_mb_width; ///< mb_width used to allocate tables
126 int alloc_mb_height; ///< mb_height used to allocate tables
127
128 AVBufferRef *mb_mean_buf;
129 uint8_t *mb_mean; ///< Table for MB luminance
130
131 AVBufferRef *hwaccel_priv_buf;
132 /**
133 * hardware accelerator private data
134 */
135 void *hwaccel_picture_private;
136
137 int field_picture; ///< whether or not the picture was encoded in separate fields
138
139 int64_t mb_var_sum; ///< sum of MB variance for current frame
140 int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
141
142 int b_frame_score;
143 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
144
145 int reference;
146 int shared;
147
148 uint64_t error[AV_NUM_DATA_POINTERS];
149} Picture;
150
151/**
152 * Motion estimation context.
153 */
154typedef 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
160 uint8_t *best_mb;
161 uint8_t *temp_mb[2];
162 uint8_t *temp;
163 int best_bits;
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;
175 int flags;
176 int sub_flags;
177 int mb_flags;
178 int pre_pass; ///< = 1 for the pre pass
179 int dia_size;
180 int xmin;
181 int xmax;
182 int ymin;
183 int ymax;
184 int pred_x;
185 int pred_y;
186 uint8_t *src[4][4];
187 uint8_t *ref[4][4];
188 int stride;
189 int uvstride;
190 /* temp variables for picture complexity calculation */
191 int64_t mc_mb_var_sum_temp;
192 int64_t 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,
204 int size, int h);
205}MotionEstContext;
206
207/**
208 * MpegEncContext.
209 */
210typedef struct MpegEncContext {
211 AVClass *class;
212
213 int y_dc_scale, c_dc_scale;
214 int ac_pred;
215 int block_last_index[12]; ///< last non zero coefficient in block
216 int h263_aic; ///< Advanded INTRA Coding (AIC)
217
218 /* scantables */
219 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
220 ScanTable intra_scantable;
221 ScanTable intra_h_scantable;
222 ScanTable intra_v_scantable;
223
224 /* WARNING: changes above this line require updates to hardcoded
225 * offsets used in asm. */
226
227 struct AVCodecContext *avctx;
228 /* the following parameters must be initialized before encoding */
229 int width, height;///< picture size. must be a multiple of 16
230 int gop_size;
231 int intra_only; ///< if true, only intra pictures are generated
232 int bit_rate; ///< wanted bit rate
233 enum OutputFormat out_format; ///< output format
234 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
235 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
236
237/* the following codec id fields are deprecated in favor of codec_id */
238 int h263_plus; ///< h263 plus headers
239 int h263_flv; ///< use flv h263 header
240
241 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
242 int fixed_qscale; ///< fixed qscale if non zero
243 int encoding; ///< true if we are encoding (vs decoding)
244 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
245 int flags2; ///< AVCodecContext.flags2
246 int max_b_frames; ///< max number of b-frames for encoding
247 int luma_elim_threshold;
248 int chroma_elim_threshold;
249 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
250 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
251 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
252 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
253 /* the following fields are managed internally by the encoder */
254
255 /* sequence parameters */
256 int context_initialized;
257 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
258 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
259 int picture_number; //FIXME remove, unclear definition
260 int picture_in_gop_number; ///< 0-> first pic in gop, ...
261 int mb_width, mb_height; ///< number of MBs horizontally & vertically
262 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
263 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
264 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
265 int mb_num; ///< number of MBs of a picture
266 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
267 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
268 Picture *picture; ///< main picture buffer
269 Picture **input_picture; ///< next pictures on display order for encoding
270 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
271
272 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
273 /**
274 * pts difference between the first and second input frame, used for
275 * calculating dts of the first frame when there's a delay */
276 int64_t dts_delta;
277 /**
278 * reordered pts to be used as dts for the next output frame when there's
279 * a delay */
280 int64_t reordered_pts;
281
282 /** bit output */
283 PutBitContext pb;
284
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
289
290 /**
291 * copy of the previous picture structure.
292 * note, linesize & data, might not match the previous picture (for field pictures)
293 */
294 Picture last_picture;
295
296 /**
297 * copy of the next picture structure.
298 * note, linesize & data, might not match the next picture (for field pictures)
299 */
300 Picture next_picture;
301
302 /**
303 * copy of the source picture structure for encoding.
304 * note, linesize & data, might not match the source picture (for field pictures)
305 */
306 Picture new_picture;
307
308 /**
309 * copy of the current picture structure.
310 * note, linesize & data, might not match the current picture (for field pictures)
311 */
312 Picture current_picture; ///< buffer to store the decompressed current picture
313
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 last_dc[3]; ///< last DC values for MPEG1
318 int16_t *dc_val_base;
319 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
320 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
321 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
322 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
323 uint8_t *coded_block_base;
324 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
325 int16_t (*ac_val_base)[16];
326 int16_t (*ac_val[3])[16]; ///< used for mpeg4 AC prediction, all 3 arrays must be continuous
327 int mb_skipped; ///< MUST BE SET only during DECODING
328 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
329 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
330 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
331 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
332 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
333 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
334 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
335 uint8_t *obmc_scratchpad;
336 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
337
338 int qscale; ///< QP
339 int chroma_qscale; ///< chroma QP
340 unsigned int lambda; ///< lagrange multipler used in rate distortion
341 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
342 int *lambda_table;
343 int adaptive_quant; ///< use adaptive quantization
344 int dquant; ///< qscale difference to prev qscale
345 int closed_gop; ///< MPEG1/2 GOP is closed
346 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
347 int vbv_delay;
348 int last_pict_type; //FIXME removes
349 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
350 int droppable;
351 int frame_rate_index;
352 AVRational mpeg2_frame_rate_ext;
353 int last_lambda_for[5]; ///< last lambda for a specific pict type
354 int skipdct; ///< skip dct and code zero residual
355
356 /* motion compensation */
357 int unrestricted_mv; ///< mv can point outside of the coded picture
358 int h263_long_vectors; ///< use horrible h263v1 long vector mode
359
360 BlockDSPContext bdsp;
361 FDCTDSPContext fdsp;
362 H264ChromaContext h264chroma;
363 HpelDSPContext hdsp;
364 IDCTDSPContext idsp;
365 MECmpContext mecc;
366 MpegVideoDSPContext mdsp;
367 MpegvideoEncDSPContext mpvencdsp;
368 PixblockDSPContext pdsp;
369 QpelDSPContext qdsp;
370 VideoDSPContext vdsp;
371 H263DSPContext h263dsp;
372 int f_code; ///< forward MV resolution
373 int b_code; ///< backward MV resolution for B Frames (mpeg4)
374 int16_t (*p_mv_table_base)[2];
375 int16_t (*b_forw_mv_table_base)[2];
376 int16_t (*b_back_mv_table_base)[2];
377 int16_t (*b_bidir_forw_mv_table_base)[2];
378 int16_t (*b_bidir_back_mv_table_base)[2];
379 int16_t (*b_direct_mv_table_base)[2];
380 int16_t (*p_field_mv_table_base[2][2])[2];
381 int16_t (*b_field_mv_table_base[2][2][2])[2];
382 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
383 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
384 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
385 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
386 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
387 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
388 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
389 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
390 uint8_t (*p_field_select_table[2]);
391 uint8_t (*b_field_select_table[2][2]);
392 int me_method; ///< ME algorithm
393 int mv_dir;
394#define MV_DIR_FORWARD 1
395#define MV_DIR_BACKWARD 2
396#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
397 int mv_type;
398#define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
399#define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
400#define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
401#define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
402#define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
403 /**motion vectors for a macroblock
404 first coordinate : 0 = forward 1 = backward
405 second " : depend on type
406 third " : 0 = x, 1 = y
407 */
408 int mv[2][4][2];
409 int field_select[2][2];
410 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
411 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
412 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
413
414 MotionEstContext me;
415
416 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
417 for b-frames rounding mode is always 0 */
418
419 /* macroblock layer */
420 int mb_x, mb_y;
421 int mb_skip_run;
422 int mb_intra;
423 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h)
424
425 int block_index[6]; ///< index to current MB in block based arrays with edges
426 int block_wrap[6];
427 uint8_t *dest[3];
428
429 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
430
431 /** matrix transmitted in the bitstream */
432 uint16_t intra_matrix[64];
433 uint16_t chroma_intra_matrix[64];
434 uint16_t inter_matrix[64];
435 uint16_t chroma_inter_matrix[64];
436
437 int intra_quant_bias; ///< bias for the quantizer
438 int inter_quant_bias; ///< bias for the quantizer
439 int min_qcoeff; ///< minimum encodable coefficient
440 int max_qcoeff; ///< maximum encodable coefficient
441 int ac_esc_length; ///< num of bits needed to encode the longest esc
442 uint8_t *intra_ac_vlc_length;
443 uint8_t *intra_ac_vlc_last_length;
444 uint8_t *inter_ac_vlc_length;
445 uint8_t *inter_ac_vlc_last_length;
446 uint8_t *luma_dc_vlc_length;
447#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
448
449 int coded_score[12];
450
451 /** precomputed matrix (combine qscale and DCT renorm) */
452 int (*q_intra_matrix)[64];
453 int (*q_chroma_intra_matrix)[64];
454 int (*q_inter_matrix)[64];
455 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
456 uint16_t (*q_intra_matrix16)[2][64];
457 uint16_t (*q_chroma_intra_matrix16)[2][64];
458 uint16_t (*q_inter_matrix16)[2][64];
459
460 /* noise reduction */
461 int (*dct_error_sum)[64];
462 int dct_count[2];
463 uint16_t (*dct_offset)[64];
464
465 /* bit rate control */
466 int64_t total_bits;
467 int frame_bits; ///< bits used for the current frame
468 int stuffing_bits; ///< bits used for stuffing
469 int next_lambda; ///< next lambda used for retrying to encode a frame
470 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
471
472 /* statistics, used for 2-pass encoding */
473 int mv_bits;
474 int header_bits;
475 int i_tex_bits;
476 int p_tex_bits;
477 int i_count;
478 int f_count;
479 int b_count;
480 int skip_count;
481 int misc_bits; ///< cbp, mb_type
482 int last_bits; ///< temp var used for calculating the above vars
483
484 /* error concealment / resync */
485 int resync_mb_x; ///< x position of last resync marker
486 int resync_mb_y; ///< y position of last resync marker
487 GetBitContext last_resync_gb; ///< used to search for the next resync marker
488 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
489 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
490 int err_recognition;
491
492 ParseContext parse_context;
493
494 /* H.263 specific */
495 int gob_index;
496 int obmc; ///< overlapped block motion compensation
497 int mb_info; ///< interval for outputting info about mb offsets as side data
498 int prev_mb_info, last_mb_info;
499 uint8_t *mb_info_ptr;
500 int mb_info_size;
501 int ehc_mode;
502
503 /* H.263+ specific */
504 int umvplus; ///< == H263+ && unrestricted_mv
505 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
506 int h263_slice_structured;
507 int alt_inter_vlc; ///< alternative inter vlc
508 int modified_quant;
509 int loop_filter;
510 int custom_pcf;
511
512 /* mpeg4 specific */
513 ///< number of bits to represent the fractional part of time (encoder only)
514 int time_increment_bits;
515 int last_time_base;
516 int time_base; ///< time in seconds of last I,P,S Frame
517 int64_t time; ///< time of current frame
518 int64_t last_non_b_time;
519 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
520 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
521 uint16_t pp_field_time;
522 uint16_t pb_field_time; ///< like above, just for interlaced
523 int real_sprite_warping_points;
524 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
525 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
526 int mcsel;
527 int quant_precision;
528 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
529 int aspect_ratio_info; //FIXME remove
530 int sprite_warping_accuracy;
531 int data_partitioning; ///< data partitioning flag from header
532 int partitioned_frame; ///< is current frame partitioned
533 int low_delay; ///< no reordering needed / has no b-frames
534 int vo_type;
535 PutBitContext tex_pb; ///< used for data partitioned VOPs
536 PutBitContext pb2; ///< used for data partitioned VOPs
537 int mpeg_quant;
538 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
539
540 /* divx specific, used to workaround (many) bugs in divx5 */
541 int divx_packed;
542 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
543 int bitstream_buffer_size;
544 unsigned int allocated_bitstream_buffer_size;
545
546 /* RV10 specific */
547 int rv10_version; ///< RV10 version: 0 or 3
548 int rv10_first_dc_coded[3];
549
550 /* MJPEG specific */
551 struct MJpegContext *mjpeg_ctx;
552 int esc_pos;
553
554 /* MSMPEG4 specific */
555 int mv_table_index;
556 int rl_table_index;
557 int rl_chroma_table_index;
558 int dc_table_index;
559 int use_skip_mb_code;
560 int slice_height; ///< in macroblocks
561 int first_slice_line; ///< used in mpeg4 too to handle resync markers
562 int flipflop_rounding;
563 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
564 int per_mb_rl_table;
565 int esc3_level_length;
566 int esc3_run_length;
567 /** [mb_intra][isChroma][level][run][last] */
568 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
569 int inter_intra_pred;
570 int mspel;
571
572 /* decompression specific */
573 GetBitContext gb;
574
575 /* Mpeg1 specific */
576 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
577 int last_mv_dir; ///< last mv_dir, used for b frame encoding
578 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
579
580 /* MPEG-2-specific - I wished not to have to support this mess. */
581 int progressive_sequence;
582 int mpeg_f_code[2][2];
583
584 // picture structure defines are loaded from mpegutils.h
585 int picture_structure;
586
587 int intra_dc_precision;
588 int frame_pred_frame_dct;
589 int top_field_first;
590 int concealment_motion_vectors;
591 int q_scale_type;
592 int intra_vlc_format;
593 int alternate_scan;
594 int seq_disp_ext;
595 int repeat_first_field;
596 int chroma_420_type;
597 int chroma_format;
598#define CHROMA_420 1
599#define CHROMA_422 2
600#define CHROMA_444 3
601 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
602 int chroma_y_shift;
603
604 int progressive_frame;
605 int full_pel[2];
606 int interlaced_dct;
607 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
608 int drop_frame_timecode; ///< timecode is in drop frame format.
609 int scan_offset; ///< reserve space for SVCD scan offset user data.
610
611 /* RTP specific */
612 int rtp_mode;
613
614 char *tc_opt_str; ///< timecode option string
615 AVTimecode tc; ///< timecode context
616
617 uint8_t *ptr_lastgob;
618 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
619 int pack_pblocks; //xvmc needs to keep blocks without gaps.
620 int16_t (*pblocks[12])[64];
621
622 int16_t (*block)[64]; ///< points to one of the following blocks
623 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
624 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
625#define SLICE_OK 0
626#define SLICE_ERROR -1
627#define SLICE_END -2 ///<end marker found
628#define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
629
630 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
631 int16_t *block/*align 16*/, int n, int qscale);
632 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
633 int16_t *block/*align 16*/, int n, int qscale);
634 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
635 int16_t *block/*align 16*/, int n, int qscale);
636 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
637 int16_t *block/*align 16*/, int n, int qscale);
638 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
639 int16_t *block/*align 16*/, int n, int qscale);
640 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
641 int16_t *block/*align 16*/, int n, int qscale);
642 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
643 int16_t *block/*align 16*/, int n, int qscale);
644 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
645 int16_t *block/*align 16*/, int n, int qscale);
646 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
647 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
648 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
649
650 int mpv_flags; ///< flags set by private options
651 int quantizer_noise_shaping;
652
653 /* temp buffers for rate control */
654 float *cplx_tab, *bits_tab;
655
656 /* flag to indicate a reinitialization is required, e.g. after
657 * a frame size change */
658 int context_reinit;
659
660 ERContext er;
661
662 int error_rate;
663
664 /* temporary frames used by b_frame_strategy = 2 */
665 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
666} MpegEncContext;
667
668#define REBASE_PICTURE(pic, new_ctx, old_ctx) \
669 ((pic && pic >= old_ctx->picture && \
670 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
671 &new_ctx->picture[pic - old_ctx->picture] : NULL)
672
673/* mpegvideo_enc common options */
674#define FF_MPV_FLAG_SKIP_RD 0x0001
675#define FF_MPV_FLAG_STRICT_GOP 0x0002
676#define FF_MPV_FLAG_QP_RD 0x0004
677#define FF_MPV_FLAG_CBP_RD 0x0008
678#define FF_MPV_FLAG_NAQ 0x0010
679#define FF_MPV_FLAG_MV0 0x0020
680
681#define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
682#define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
683#define FF_MPV_COMMON_OPTS \
684{ "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" },\
685{ "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" },\
686{ "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" },\
687{ "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" },\
688{ "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" },\
689{ "naq", "normalize adaptive quantization", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
690{ "mv0", "always try a mb with mv=<0,0>", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_MV0 }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
691{ "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
692 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
693{ "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
694 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
695{ "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
696{ "error_rate", "Simulate errors in the bitstream to test error concealment.", \
697 FF_MPV_OFFSET(error_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
698
699extern const AVOption ff_mpv_generic_options[];
700
701#define FF_MPV_GENERIC_CLASS(name) \
702static const AVClass name ## _class = {\
703 .class_name = #name " encoder",\
704 .item_name = av_default_item_name,\
705 .option = ff_mpv_generic_options,\
706 .version = LIBAVUTIL_VERSION_INT,\
707};
708
709/**
710 * Set the given MpegEncContext to common defaults (same for encoding
711 * and decoding). The changed fields will not depend upon the prior
712 * state of the MpegEncContext.
713 */
714void ff_mpv_common_defaults(MpegEncContext *s);
715
716void ff_dct_encode_init_x86(MpegEncContext *s);
717
718int ff_mpv_common_init(MpegEncContext *s);
719void ff_mpv_common_init_arm(MpegEncContext *s);
720void ff_mpv_common_init_axp(MpegEncContext *s);
721void ff_mpv_common_init_neon(MpegEncContext *s);
722void ff_mpv_common_init_ppc(MpegEncContext *s);
723void ff_mpv_common_init_x86(MpegEncContext *s);
724
725int ff_mpv_common_frame_size_change(MpegEncContext *s);
726void ff_mpv_common_end(MpegEncContext *s);
727
728void ff_mpv_decode_defaults(MpegEncContext *s);
729void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx);
730void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64]);
731void ff_mpv_report_decode_progress(MpegEncContext *s);
732
733int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
734void ff_mpv_frame_end(MpegEncContext *s);
735
736int ff_mpv_lowest_referenced_row(MpegEncContext *s, int dir);
737
738int ff_mpv_encode_init(AVCodecContext *avctx);
739void ff_mpv_encode_init_x86(MpegEncContext *s);
740
741int ff_mpv_encode_end(AVCodecContext *avctx);
742int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
743 const AVFrame *frame, int *got_packet);
744
745void ff_clean_intra_table_entries(MpegEncContext *s);
746void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
747void ff_mpeg_flush(AVCodecContext *avctx);
748
749void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
750void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table,
751 uint32_t *mbtype_table, int8_t *qscale_table, int16_t (*motion_val[2])[2],
752 int *low_delay,
753 int mb_width, int mb_height, int mb_stride, int quarter_sample);
754
755int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
756
757void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
758int ff_find_unused_picture(MpegEncContext *s, int shared);
759void ff_denoise_dct(MpegEncContext *s, int16_t *block);
760int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
761int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
762void ff_set_qscale(MpegEncContext * s, int qscale);
763
764void ff_mpv_idct_init(MpegEncContext *s);
765int ff_dct_encode_init(MpegEncContext *s);
766void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],
767 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
768int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
769
770void ff_init_block_index(MpegEncContext *s);
771
772void ff_mpv_motion(MpegEncContext *s,
773 uint8_t *dest_y, uint8_t *dest_cb,
774 uint8_t *dest_cr, int dir,
775 uint8_t **ref_picture,
776 op_pixels_func (*pix_op)[4],
777 qpel_mc_func (*qpix_op)[16]);
778
779/**
780 * Allocate a Picture.
781 * The pixels are allocated/set by calling get_buffer() if shared = 0.
782 */
783int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
784
785/**
786 * permute block according to permuatation.
787 * @param last last non zero element in scantable order
788 */
789void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
790
791static inline void ff_update_block_index(MpegEncContext *s){
792 const int block_size= 8 >> s->avctx->lowres;
793
794 s->block_index[0]+=2;
795 s->block_index[1]+=2;
796 s->block_index[2]+=2;
797 s->block_index[3]+=2;
798 s->block_index[4]++;
799 s->block_index[5]++;
800 s->dest[0]+= 2*block_size;
801 s->dest[1]+= block_size;
802 s->dest[2]+= block_size;
803}
804
805static inline int get_bits_diff(MpegEncContext *s){
806 const int bits= put_bits_count(&s->pb);
807 const int last= s->last_bits;
808
809 s->last_bits = bits;
810
811 return bits - last;
812}
813
814static inline int ff_h263_round_chroma(int x){
815 static const uint8_t h263_chroma_roundtab[16] = {
816 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
817 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
818 };
819 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
820}
821
822/* motion_est.c */
823void ff_estimate_p_frame_motion(MpegEncContext * s,
824 int mb_x, int mb_y);
825void ff_estimate_b_frame_motion(MpegEncContext * s,
826 int mb_x, int mb_y);
827int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
828void ff_fix_long_p_mvs(MpegEncContext * s);
829void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
830 int16_t (*mv_table)[2], int f_code, int type, int truncate);
831int ff_init_me(MpegEncContext *s);
832int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
833int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
834 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
835 int ref_mv_scale, int size, int h);
836int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
837 int ref_index, int size, int h, int add_rate);
838
839/* mpeg12.c */
840extern const uint8_t ff_mpeg1_dc_scale_table[128];
841extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
842
843void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
844void ff_mpeg1_encode_mb(MpegEncContext *s,
845 int16_t block[6][64],
846 int motion_x, int motion_y);
847void ff_mpeg1_encode_init(MpegEncContext *s);
848void ff_mpeg1_encode_slice_header(MpegEncContext *s);
849
850extern const uint8_t ff_aic_dc_scale_table[32];
851extern const uint8_t ff_h263_chroma_qscale_table[32];
852
853/* rv10.c */
854void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
855int ff_rv_decode_dc(MpegEncContext *s, int n);
856void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
857
858
859/* msmpeg4.c */
860void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
861void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
862void ff_msmpeg4_encode_mb(MpegEncContext * s,
863 int16_t block[6][64],
864 int motion_x, int motion_y);
865int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
866int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
867int ff_msmpeg4_decode_init(AVCodecContext *avctx);
868void ff_msmpeg4_encode_init(MpegEncContext *s);
869int ff_wmv2_decode_picture_header(MpegEncContext * s);
870int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
871void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
872void ff_mspel_motion(MpegEncContext *s,
873 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
874 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
875 int motion_x, int motion_y, int h);
876int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
877void ff_wmv2_encode_mb(MpegEncContext * s,
878 int16_t block[6][64],
879 int motion_x, int motion_y);
880
881int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
882void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
883void ff_free_picture_tables(Picture *pic);
884
885
886#endif /* AVCODEC_MPEGVIDEO_H */
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