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 Libav.
8 * Libav 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 * Libav 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 Libav; 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"
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 16
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
84 * Value of Picture.reference when Picture is not a reference picture, but
85 * is held for delayed output.
87 #define DELAYED_PIC_REF 4
89 struct MpegEncContext;
94 typedef struct Picture{
98 * halfpel luma planes.
100 uint8_t *interpolated[3];
101 int8_t *qscale_table_base;
102 int16_t (*motion_val_base[2])[2];
103 uint32_t *mb_type_base;
104 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
105 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
106 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
107 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
108 #define IS_INTRA(a) ((a)&7)
109 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
110 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
111 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
112 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
113 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
114 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
115 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
116 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
117 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
118 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
119 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
120 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
121 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
122 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
123 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
124 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
125 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
126 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note does not work if subMBs
127 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
129 int field_poc[2]; ///< h264 top/bottom POC
130 int poc; ///< h264 frame POC
131 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
132 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
133 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
134 pic_num & max_pic_num; long -> long_pic_num) */
135 int long_ref; ///< 1->long term reference 0->short term reference
136 int ref_poc[2][2][32]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
137 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
138 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
139 int field_picture; ///< whether or not the picture was encoded in separate fields
141 int mb_var_sum; ///< sum of MB variance for current frame
142 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
143 uint16_t *mb_var; ///< Table for MB variances
144 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
145 uint8_t *mb_mean; ///< Table for MB luminance
146 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
147 int b_frame_score; /* */
148 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
149 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
153 * Motion estimation context.
155 typedef struct MotionEstContext{
156 AVCodecContext *avctx;
157 int skip; ///< set if ME is skipped for the current MB
158 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
159 int direct_basis_mv[4][2];
160 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
165 uint32_t *map; ///< map to avoid duplicate evaluations
166 uint32_t *score_map; ///< map to store the scores
167 unsigned map_generation;
168 int pre_penalty_factor;
169 int penalty_factor; /**< an estimate of the bits required to
170 code a given mv value, e.g. (1,0) takes
171 more bits than (0,0). We have to
172 estimate whether any reduction in
173 residual is worth the extra bits. */
174 int sub_penalty_factor;
175 int mb_penalty_factor;
179 int pre_pass; ///< = 1 for the pre pass
191 /* temp variables for picture complexity calculation */
192 int mc_mb_var_sum_temp;
194 int scene_change_score;
195 /* cmp, chroma_cmp;*/
196 op_pixels_func (*hpel_put)[4];
197 op_pixels_func (*hpel_avg)[4];
198 qpel_mc_func (*qpel_put)[16];
199 qpel_mc_func (*qpel_avg)[16];
200 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
201 uint8_t *current_mv_penalty;
202 int (*sub_motion_search)(struct MpegEncContext * s,
203 int *mx_ptr, int *my_ptr, int dmin,
204 int src_index, int ref_index,
211 typedef struct MpegEncContext {
213 struct AVCodecContext *avctx;
214 /* the following parameters must be initialized before encoding */
215 int width, height;///< picture size. must be a multiple of 16
217 int intra_only; ///< if true, only intra pictures are generated
218 int bit_rate; ///< wanted bit rate
219 enum OutputFormat out_format; ///< output format
220 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
221 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
223 /* the following codec id fields are deprecated in favor of codec_id */
224 int h263_plus; ///< h263 plus headers
225 int h263_flv; ///< use flv h263 header
227 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
228 int fixed_qscale; ///< fixed qscale if non zero
229 int encoding; ///< true if we are encoding (vs decoding)
230 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
231 int flags2; ///< AVCodecContext.flags2
232 int max_b_frames; ///< max number of b-frames for encoding
233 int luma_elim_threshold;
234 int chroma_elim_threshold;
235 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
236 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
237 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
238 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
239 /* the following fields are managed internally by the encoder */
241 /* sequence parameters */
242 int context_initialized;
243 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
244 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
245 int picture_number; //FIXME remove, unclear definition
246 int picture_in_gop_number; ///< 0-> first pic in gop, ...
247 int mb_width, mb_height; ///< number of MBs horizontally & vertically
248 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
249 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
250 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
251 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
252 int mb_num; ///< number of MBs of a picture
253 int linesize; ///< line size, in bytes, may be different from width
254 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
255 Picture *picture; ///< main picture buffer
256 Picture **input_picture; ///< next pictures on display order for encoding
257 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
259 int y_dc_scale, c_dc_scale;
261 int block_last_index[12]; ///< last non zero coefficient in block
262 int h263_aic; ///< Advanded INTRA Coding (AIC)
265 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
266 ScanTable intra_scantable;
267 ScanTable intra_h_scantable;
268 ScanTable intra_v_scantable;
270 /* WARNING: changes above this line require updates to hardcoded
271 * offsets used in asm. */
273 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
275 * pts difference between the first and second input frame, used for
276 * calculating dts of the first frame when there's a delay */
279 * reordered pts to be used as dts for the next output frame when there's
281 int64_t reordered_pts;
286 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
287 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
288 struct MpegEncContext *thread_context[MAX_THREADS];
289 int slice_context_count; ///< number of used thread_contexts
292 * copy of the previous picture structure.
293 * note, linesize & data, might not match the previous picture (for field pictures)
295 Picture last_picture;
298 * copy of the next picture structure.
299 * note, linesize & data, might not match the next picture (for field pictures)
301 Picture next_picture;
304 * copy of the source picture structure for encoding.
305 * note, linesize & data, might not match the source picture (for field pictures)
310 * copy of the current picture structure.
311 * note, linesize & data, might not match the current picture (for field pictures)
313 Picture current_picture; ///< buffer to store the decompressed current picture
315 Picture *last_picture_ptr; ///< pointer to the previous picture.
316 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
317 Picture *current_picture_ptr; ///< pointer to the current picture
318 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
319 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
320 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
321 int last_dc[3]; ///< last DC values for MPEG1
322 int16_t *dc_val_base;
323 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
324 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
325 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
326 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
327 uint8_t *coded_block_base;
328 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
329 int16_t (*ac_val_base)[16];
330 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
331 int mb_skipped; ///< MUST BE SET only during DECODING
332 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
333 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
334 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
335 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
336 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
337 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
338 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
339 uint8_t *obmc_scratchpad;
340 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
343 int chroma_qscale; ///< chroma QP
344 unsigned int lambda; ///< lagrange multipler used in rate distortion
345 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
347 int adaptive_quant; ///< use adaptive quantization
348 int dquant; ///< qscale difference to prev qscale
349 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
350 int last_pict_type; //FIXME removes
351 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
353 int frame_rate_index;
354 int last_lambda_for[5]; ///< last lambda for a specific pict type
355 int skipdct; ///< skip dct and code zero residual
357 /* motion compensation */
358 int unrestricted_mv; ///< mv can point outside of the coded picture
359 int h263_long_vectors; ///< use horrible h263v1 long vector mode
361 DSPContext dsp; ///< pointers for accelerated dsp functions
362 VideoDSPContext vdsp;
363 int f_code; ///< forward MV resolution
364 int b_code; ///< backward MV resolution for B Frames (mpeg4)
365 int16_t (*p_mv_table_base)[2];
366 int16_t (*b_forw_mv_table_base)[2];
367 int16_t (*b_back_mv_table_base)[2];
368 int16_t (*b_bidir_forw_mv_table_base)[2];
369 int16_t (*b_bidir_back_mv_table_base)[2];
370 int16_t (*b_direct_mv_table_base)[2];
371 int16_t (*p_field_mv_table_base[2][2])[2];
372 int16_t (*b_field_mv_table_base[2][2][2])[2];
373 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
374 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
375 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
376 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
377 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
378 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
379 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
380 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
381 uint8_t (*p_field_select_table[2]);
382 uint8_t (*b_field_select_table[2][2]);
383 int me_method; ///< ME algorithm
385 #define MV_DIR_FORWARD 1
386 #define MV_DIR_BACKWARD 2
387 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
389 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
390 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
391 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
392 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
393 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
394 /**motion vectors for a macroblock
395 first coordinate : 0 = forward 1 = backward
396 second " : depend on type
397 third " : 0 = x, 1 = y
400 int field_select[2][2];
401 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
402 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
403 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
407 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
408 for b-frames rounding mode is always 0 */
410 /* macroblock layer */
414 uint16_t *mb_type; ///< Table for candidate MB types for encoding
415 #define CANDIDATE_MB_TYPE_INTRA 0x01
416 #define CANDIDATE_MB_TYPE_INTER 0x02
417 #define CANDIDATE_MB_TYPE_INTER4V 0x04
418 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
419 //#define MB_TYPE_GMC 0x10
421 #define CANDIDATE_MB_TYPE_DIRECT 0x10
422 #define CANDIDATE_MB_TYPE_FORWARD 0x20
423 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
424 #define CANDIDATE_MB_TYPE_BIDIR 0x80
426 #define CANDIDATE_MB_TYPE_INTER_I 0x100
427 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
428 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
429 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
431 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
433 int block_index[6]; ///< index to current MB in block based arrays with edges
437 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
439 /** matrix transmitted in the bitstream */
440 uint16_t intra_matrix[64];
441 uint16_t chroma_intra_matrix[64];
442 uint16_t inter_matrix[64];
443 uint16_t chroma_inter_matrix[64];
444 #define QUANT_BIAS_SHIFT 8
445 int intra_quant_bias; ///< bias for the quantizer
446 int inter_quant_bias; ///< bias for the quantizer
447 int min_qcoeff; ///< minimum encodable coefficient
448 int max_qcoeff; ///< maximum encodable coefficient
449 int ac_esc_length; ///< num of bits needed to encode the longest esc
450 uint8_t *intra_ac_vlc_length;
451 uint8_t *intra_ac_vlc_last_length;
452 uint8_t *inter_ac_vlc_length;
453 uint8_t *inter_ac_vlc_last_length;
454 uint8_t *luma_dc_vlc_length;
455 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
459 /** precomputed matrix (combine qscale and DCT renorm) */
460 int (*q_intra_matrix)[64];
461 int (*q_inter_matrix)[64];
462 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
463 uint16_t (*q_intra_matrix16)[2][64];
464 uint16_t (*q_inter_matrix16)[2][64];
466 /* noise reduction */
467 int (*dct_error_sum)[64];
469 uint16_t (*dct_offset)[64];
471 void *opaque; ///< private data for the user
473 /* bit rate control */
475 int frame_bits; ///< bits used for the current frame
476 int next_lambda; ///< next lambda used for retrying to encode a frame
477 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
479 /* statistics, used for 2-pass encoding */
488 int misc_bits; ///< cbp, mb_type
489 int last_bits; ///< temp var used for calculating the above vars
491 /* error concealment / resync */
492 int error_count, error_occurred;
493 uint8_t *error_status_table; ///< table of the error status of each MB
494 #define VP_START 1 ///< current MB is the first after a resync marker
495 #define ER_AC_ERROR 2
496 #define ER_DC_ERROR 4
497 #define ER_MV_ERROR 8
502 #define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
503 #define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
505 int resync_mb_x; ///< x position of last resync marker
506 int resync_mb_y; ///< y position of last resync marker
507 GetBitContext last_resync_gb; ///< used to search for the next resync marker
508 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
509 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
512 ParseContext parse_context;
516 int obmc; ///< overlapped block motion compensation
517 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
518 int mb_info; ///< interval for outputting info about mb offsets as side data
519 int prev_mb_info, last_mb_info;
520 uint8_t *mb_info_ptr;
523 /* H.263+ specific */
524 int umvplus; ///< == H263+ && unrestricted_mv
525 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
526 int h263_slice_structured;
527 int alt_inter_vlc; ///< alternative inter vlc
533 int time_increment_bits; ///< number of bits to represent the fractional part of time
535 int time_base; ///< time in seconds of last I,P,S Frame
536 int64_t time; ///< time of current frame
537 int64_t last_non_b_time;
538 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
539 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
540 uint16_t pp_field_time;
541 uint16_t pb_field_time; ///< like above, just for interlaced
543 int vol_sprite_usage;
548 int sprite_brightness_change;
549 int num_sprite_warping_points;
550 int real_sprite_warping_points;
551 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
552 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
553 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
554 int sprite_shift[2]; ///< sprite shift [isChroma]
557 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
560 int enhancement_type;
563 int aspect_ratio_info; //FIXME remove
564 int sprite_warping_accuracy;
565 int low_latency_sprite;
566 int data_partitioning; ///< data partitioning flag from header
567 int partitioned_frame; ///< is current frame partitioned
568 int rvlc; ///< reversible vlc
569 int resync_marker; ///< could this stream contain resync markers
570 int low_delay; ///< no reordering needed / has no b-frames
572 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
573 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
574 int use_intra_dc_vlc;
575 PutBitContext tex_pb; ///< used for data partitioned VOPs
576 PutBitContext pb2; ///< used for data partitioned VOPs
578 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
579 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
580 int cplx_estimation_trash_i;
581 int cplx_estimation_trash_p;
582 int cplx_estimation_trash_b;
584 /* divx specific, used to workaround (many) bugs in divx5 */
588 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
589 int bitstream_buffer_size;
590 unsigned int allocated_bitstream_buffer_size;
594 /* lavc specific stuff, used to workaround bugs in libavcodec */
598 int rv10_version; ///< RV10 version: 0 or 3
599 int rv10_first_dc_coded[3];
600 int orig_width, orig_height;
603 struct MJpegContext *mjpeg_ctx;
604 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
605 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
607 /* MSMPEG4 specific */
610 int rl_chroma_table_index;
612 int use_skip_mb_code;
613 int slice_height; ///< in macroblocks
614 int first_slice_line; ///< used in mpeg4 too to handle resync markers
615 int flipflop_rounding;
616 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
618 int esc3_level_length;
620 /** [mb_intra][isChroma][level][run][last] */
621 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
622 int inter_intra_pred;
625 /* decompression specific */
629 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
630 int last_mv_dir; ///< last mv_dir, used for b frame encoding
631 int broken_link; ///< no_output_of_prior_pics_flag
632 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
634 /* MPEG-2-specific - I wished not to have to support this mess. */
635 int progressive_sequence;
636 int mpeg_f_code[2][2];
637 int picture_structure;
639 #define PICT_TOP_FIELD 1
640 #define PICT_BOTTOM_FIELD 2
643 int intra_dc_precision;
644 int frame_pred_frame_dct;
646 int concealment_motion_vectors;
648 int intra_vlc_format;
650 int repeat_first_field;
656 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
659 int progressive_frame;
663 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
664 int drop_frame_timecode; ///< timecode is in drop frame format.
665 int scan_offset; ///< reserve space for SVCD scan offset user data.
670 uint8_t *ptr_lastgob;
671 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
672 DCTELEM (*pblocks[12])[64];
674 DCTELEM (*block)[64]; ///< points to one of the following blocks
675 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
676 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
678 #define SLICE_ERROR -1
679 #define SLICE_END -2 ///<end marker found
680 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
682 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
683 DCTELEM *block/*align 16*/, int n, int qscale);
684 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
685 DCTELEM *block/*align 16*/, int n, int qscale);
686 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
687 DCTELEM *block/*align 16*/, int n, int qscale);
688 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
689 DCTELEM *block/*align 16*/, int n, int qscale);
690 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
691 DCTELEM *block/*align 16*/, int n, int qscale);
692 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
693 DCTELEM *block/*align 16*/, int n, int qscale);
694 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
695 DCTELEM *block/*align 16*/, int n, int qscale);
696 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
697 DCTELEM *block/*align 16*/, int n, int qscale);
698 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
699 DCTELEM *block/*align 16*/, int n, int qscale);
700 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
701 DCTELEM *block/*align 16*/, int n, int qscale);
702 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
703 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
704 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
706 int mpv_flags; ///< flags set by private options
707 int quantizer_noise_shaping;
709 /* error resilience stuff */
710 uint8_t *er_temp_buffer;
712 /* temp buffers for rate control */
713 float *cplx_tab, *bits_tab;
715 /* flag to indicate a reinitialization is required, e.g. after
716 * a frame size change */
720 #define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \
721 (pic >= old_ctx->picture && pic < old_ctx->picture+old_ctx->picture_count ?\
722 &new_ctx->picture[pic - old_ctx->picture] : pic - (Picture*)old_ctx + (Picture*)new_ctx)\
725 /* mpegvideo_enc common options */
726 #define FF_MPV_FLAG_SKIP_RD 0x0001
727 #define FF_MPV_FLAG_STRICT_GOP 0x0002
728 #define FF_MPV_FLAG_QP_RD 0x0004
729 #define FF_MPV_FLAG_CBP_RD 0x0008
731 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
732 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
733 #define FF_MPV_COMMON_OPTS \
734 { "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" },\
735 { "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" },\
736 { "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" },\
737 { "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" },\
738 { "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" },\
739 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
740 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
741 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
742 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
743 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
745 extern const AVOption ff_mpv_generic_options[];
747 #define FF_MPV_GENERIC_CLASS(name) \
748 static const AVClass name ## _class = {\
749 .class_name = #name " encoder",\
750 .item_name = av_default_item_name,\
751 .option = ff_mpv_generic_options,\
752 .version = LIBAVUTIL_VERSION_INT,\
756 * Set the given MpegEncContext to common defaults (same for encoding
757 * and decoding). The changed fields will not depend upon the prior
758 * state of the MpegEncContext.
760 void ff_MPV_common_defaults(MpegEncContext *s);
762 void ff_MPV_decode_defaults(MpegEncContext *s);
763 int ff_MPV_common_init(MpegEncContext *s);
764 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
765 int ff_MPV_common_frame_size_change(MpegEncContext *s);
766 void ff_MPV_common_end(MpegEncContext *s);
767 void ff_MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
768 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
769 void ff_MPV_frame_end(MpegEncContext *s);
770 int ff_MPV_encode_init(AVCodecContext *avctx);
771 int ff_MPV_encode_end(AVCodecContext *avctx);
772 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
773 const AVFrame *frame, int *got_packet);
774 void ff_MPV_encode_init_x86(MpegEncContext *s);
775 void ff_MPV_common_init_x86(MpegEncContext *s);
776 void ff_MPV_common_init_axp(MpegEncContext *s);
777 void ff_MPV_common_init_arm(MpegEncContext *s);
778 void ff_MPV_common_init_altivec(MpegEncContext *s);
779 void ff_MPV_common_init_bfin(MpegEncContext *s);
780 void ff_clean_intra_table_entries(MpegEncContext *s);
781 void ff_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, DCTELEM *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_er_frame_start(MpegEncContext *s);
796 void ff_er_frame_end(MpegEncContext *s);
797 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
799 int ff_dct_common_init(MpegEncContext *s);
800 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
801 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
802 int ff_dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
804 void ff_init_block_index(MpegEncContext *s);
805 void ff_copy_picture(Picture *dst, Picture *src);
807 void ff_MPV_motion(MpegEncContext *s,
808 uint8_t *dest_y, uint8_t *dest_cb,
809 uint8_t *dest_cr, int dir,
810 uint8_t **ref_picture,
811 op_pixels_func (*pix_op)[4],
812 qpel_mc_func (*qpix_op)[16]);
815 * Allocate a Picture.
816 * The pixels are allocated/set by calling get_buffer() if shared = 0.
818 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
820 extern const enum AVPixelFormat ff_pixfmt_list_420[];
821 extern const enum AVPixelFormat ff_hwaccel_pixfmt_list_420[];
823 static inline void ff_update_block_index(MpegEncContext *s){
824 const int block_size = 8;
826 s->block_index[0]+=2;
827 s->block_index[1]+=2;
828 s->block_index[2]+=2;
829 s->block_index[3]+=2;
832 s->dest[0]+= 2*block_size;
833 s->dest[1]+= block_size;
834 s->dest[2]+= block_size;
837 static inline int get_bits_diff(MpegEncContext *s){
838 const int bits= put_bits_count(&s->pb);
839 const int last= s->last_bits;
846 static inline int ff_h263_round_chroma(int x){
847 static const uint8_t h263_chroma_roundtab[16] = {
848 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
849 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
851 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
855 void ff_estimate_p_frame_motion(MpegEncContext * s,
857 void ff_estimate_b_frame_motion(MpegEncContext * s,
859 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
860 void ff_fix_long_p_mvs(MpegEncContext * s);
861 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
862 int16_t (*mv_table)[2], int f_code, int type, int truncate);
863 int ff_init_me(MpegEncContext *s);
864 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
865 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
866 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
867 int ref_mv_scale, int size, int h);
868 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
869 int ref_index, int size, int h, int add_rate);
872 extern const uint8_t ff_mpeg1_dc_scale_table[128];
873 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
875 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
876 void ff_mpeg1_encode_mb(MpegEncContext *s,
877 DCTELEM block[6][64],
878 int motion_x, int motion_y);
879 void ff_mpeg1_encode_init(MpegEncContext *s);
880 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
881 void ff_mpeg1_clean_buffers(MpegEncContext *s);
882 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
884 extern const uint8_t ff_aic_dc_scale_table[32];
885 extern const uint8_t ff_h263_chroma_qscale_table[32];
886 extern const uint8_t ff_h263_loop_filter_strength[32];
889 void ff_h261_loop_filter(MpegEncContext *s);
890 void ff_h261_reorder_mb_index(MpegEncContext* s);
891 void ff_h261_encode_mb(MpegEncContext *s,
892 DCTELEM block[6][64],
893 int motion_x, int motion_y);
894 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
895 void ff_h261_encode_init(MpegEncContext *s);
896 int ff_h261_get_picture_format(int width, int height);
900 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
901 int ff_rv_decode_dc(MpegEncContext *s, int n);
902 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
906 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
907 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
908 void ff_msmpeg4_encode_mb(MpegEncContext * s,
909 DCTELEM block[6][64],
910 int motion_x, int motion_y);
911 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
912 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
913 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
914 void ff_msmpeg4_encode_init(MpegEncContext *s);
915 int ff_wmv2_decode_picture_header(MpegEncContext * s);
916 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
917 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
918 void ff_mspel_motion(MpegEncContext *s,
919 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
920 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
921 int motion_x, int motion_y, int h);
922 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
923 void ff_wmv2_encode_mb(MpegEncContext * s,
924 DCTELEM block[6][64],
925 int motion_x, int motion_y);
927 #endif /* AVCODEC_MPEGVIDEO_H */