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
33 #include "error_resilience.h"
36 #include "ratecontrol.h"
38 #include "mpeg12data.h"
43 #include "libavutil/opt.h"
45 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
55 #define MPEG_BUF_SIZE (16 * 1024)
57 #define QMAT_SHIFT_MMX 16
63 #define MAX_THREADS 16
65 #define MAX_PICTURE_COUNT 32
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{
100 AVBufferRef *qscale_table_buf;
101 int8_t *qscale_table;
103 AVBufferRef *motion_val_buf[2];
104 int16_t (*motion_val[2])[2];
106 AVBufferRef *mb_type_buf;
109 AVBufferRef *mbskip_table_buf;
110 uint8_t *mbskip_table;
112 AVBufferRef *ref_index_buf[2];
113 int8_t *ref_index[2];
115 AVBufferRef *mb_var_buf;
116 uint16_t *mb_var; ///< Table for MB variances
118 AVBufferRef *mc_mb_var_buf;
119 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
121 AVBufferRef *mb_mean_buf;
122 uint8_t *mb_mean; ///< Table for MB luminance
124 AVBufferRef *hwaccel_priv_buf;
126 * hardware accelerator private data
128 void *hwaccel_picture_private;
130 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
131 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
132 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
133 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
134 #define IS_INTRA(a) ((a)&7)
135 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
136 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
137 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
138 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
139 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
140 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
141 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
142 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
143 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
144 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
145 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
146 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
147 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
148 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
149 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
150 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
151 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
152 #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
153 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
155 int field_poc[2]; ///< h264 top/bottom POC
156 int poc; ///< h264 frame POC
157 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
158 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
159 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
160 pic_num & max_pic_num; long -> long_pic_num) */
161 int long_ref; ///< 1->long term reference 0->short term reference
162 int ref_poc[2][2][32]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
163 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
164 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
165 int field_picture; ///< whether or not the picture was encoded in separate fields
167 int mb_var_sum; ///< sum of MB variance for current frame
168 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
170 int b_frame_score; /* */
171 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
178 * Motion estimation context.
180 typedef struct MotionEstContext{
181 AVCodecContext *avctx;
182 int skip; ///< set if ME is skipped for the current MB
183 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
184 int direct_basis_mv[4][2];
185 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
190 uint32_t *map; ///< map to avoid duplicate evaluations
191 uint32_t *score_map; ///< map to store the scores
192 unsigned map_generation;
193 int pre_penalty_factor;
194 int penalty_factor; /**< an estimate of the bits required to
195 code a given mv value, e.g. (1,0) takes
196 more bits than (0,0). We have to
197 estimate whether any reduction in
198 residual is worth the extra bits. */
199 int sub_penalty_factor;
200 int mb_penalty_factor;
204 int pre_pass; ///< = 1 for the pre pass
216 /* temp variables for picture complexity calculation */
217 int mc_mb_var_sum_temp;
219 int scene_change_score;
220 /* cmp, chroma_cmp;*/
221 op_pixels_func (*hpel_put)[4];
222 op_pixels_func (*hpel_avg)[4];
223 qpel_mc_func (*qpel_put)[16];
224 qpel_mc_func (*qpel_avg)[16];
225 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
226 uint8_t *current_mv_penalty;
227 int (*sub_motion_search)(struct MpegEncContext * s,
228 int *mx_ptr, int *my_ptr, int dmin,
229 int src_index, int ref_index,
236 typedef struct MpegEncContext {
238 struct AVCodecContext *avctx;
239 /* the following parameters must be initialized before encoding */
240 int width, height;///< picture size. must be a multiple of 16
242 int intra_only; ///< if true, only intra pictures are generated
243 int bit_rate; ///< wanted bit rate
244 enum OutputFormat out_format; ///< output format
245 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
246 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
248 /* the following codec id fields are deprecated in favor of codec_id */
249 int h263_plus; ///< h263 plus headers
250 int h263_flv; ///< use flv h263 header
252 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
253 int fixed_qscale; ///< fixed qscale if non zero
254 int encoding; ///< true if we are encoding (vs decoding)
255 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
256 int flags2; ///< AVCodecContext.flags2
257 int max_b_frames; ///< max number of b-frames for encoding
258 int luma_elim_threshold;
259 int chroma_elim_threshold;
260 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
261 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
262 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
263 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
264 /* the following fields are managed internally by the encoder */
266 /* sequence parameters */
267 int context_initialized;
268 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
269 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
270 int picture_number; //FIXME remove, unclear definition
271 int picture_in_gop_number; ///< 0-> first pic in gop, ...
272 int mb_width, mb_height; ///< number of MBs horizontally & vertically
273 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
274 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
275 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
276 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
277 int mb_num; ///< number of MBs of a picture
278 int linesize; ///< line size, in bytes, may be different from width
279 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
280 Picture *picture; ///< main picture buffer
281 Picture **input_picture; ///< next pictures on display order for encoding
282 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
284 int y_dc_scale, c_dc_scale;
286 int block_last_index[12]; ///< last non zero coefficient in block
287 int h263_aic; ///< Advanded INTRA Coding (AIC)
290 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
291 ScanTable intra_scantable;
292 ScanTable intra_h_scantable;
293 ScanTable intra_v_scantable;
295 /* WARNING: changes above this line require updates to hardcoded
296 * offsets used in asm. */
298 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
300 * pts difference between the first and second input frame, used for
301 * calculating dts of the first frame when there's a delay */
304 * reordered pts to be used as dts for the next output frame when there's
306 int64_t reordered_pts;
311 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
312 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
313 struct MpegEncContext *thread_context[MAX_THREADS];
314 int slice_context_count; ///< number of used thread_contexts
317 * copy of the previous picture structure.
318 * note, linesize & data, might not match the previous picture (for field pictures)
320 Picture last_picture;
323 * copy of the next picture structure.
324 * note, linesize & data, might not match the next picture (for field pictures)
326 Picture next_picture;
329 * copy of the source picture structure for encoding.
330 * note, linesize & data, might not match the source picture (for field pictures)
335 * copy of the current picture structure.
336 * note, linesize & data, might not match the current picture (for field pictures)
338 Picture current_picture; ///< buffer to store the decompressed current picture
340 Picture *last_picture_ptr; ///< pointer to the previous picture.
341 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
342 Picture *current_picture_ptr; ///< pointer to the current picture
343 int last_dc[3]; ///< last DC values for MPEG1
344 int16_t *dc_val_base;
345 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
346 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
347 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
348 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
349 uint8_t *coded_block_base;
350 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
351 int16_t (*ac_val_base)[16];
352 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
353 int mb_skipped; ///< MUST BE SET only during DECODING
354 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
355 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
356 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
357 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
358 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
359 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
360 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
361 uint8_t *obmc_scratchpad;
362 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
365 int chroma_qscale; ///< chroma QP
366 unsigned int lambda; ///< lagrange multipler used in rate distortion
367 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
369 int adaptive_quant; ///< use adaptive quantization
370 int dquant; ///< qscale difference to prev qscale
371 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
372 int last_pict_type; //FIXME removes
373 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
375 int frame_rate_index;
376 int last_lambda_for[5]; ///< last lambda for a specific pict type
377 int skipdct; ///< skip dct and code zero residual
379 /* motion compensation */
380 int unrestricted_mv; ///< mv can point outside of the coded picture
381 int h263_long_vectors; ///< use horrible h263v1 long vector mode
383 DSPContext dsp; ///< pointers for accelerated dsp functions
384 VideoDSPContext vdsp;
385 int f_code; ///< forward MV resolution
386 int b_code; ///< backward MV resolution for B Frames (mpeg4)
387 int16_t (*p_mv_table_base)[2];
388 int16_t (*b_forw_mv_table_base)[2];
389 int16_t (*b_back_mv_table_base)[2];
390 int16_t (*b_bidir_forw_mv_table_base)[2];
391 int16_t (*b_bidir_back_mv_table_base)[2];
392 int16_t (*b_direct_mv_table_base)[2];
393 int16_t (*p_field_mv_table_base[2][2])[2];
394 int16_t (*b_field_mv_table_base[2][2][2])[2];
395 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
396 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
397 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
398 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
399 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
400 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
401 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
402 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
403 uint8_t (*p_field_select_table[2]);
404 uint8_t (*b_field_select_table[2][2]);
405 int me_method; ///< ME algorithm
407 #define MV_DIR_FORWARD 1
408 #define MV_DIR_BACKWARD 2
409 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
411 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
412 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
413 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
414 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
415 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
416 /**motion vectors for a macroblock
417 first coordinate : 0 = forward 1 = backward
418 second " : depend on type
419 third " : 0 = x, 1 = y
422 int field_select[2][2];
423 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
424 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
425 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
429 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
430 for b-frames rounding mode is always 0 */
432 /* macroblock layer */
436 uint16_t *mb_type; ///< Table for candidate MB types for encoding
437 #define CANDIDATE_MB_TYPE_INTRA 0x01
438 #define CANDIDATE_MB_TYPE_INTER 0x02
439 #define CANDIDATE_MB_TYPE_INTER4V 0x04
440 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
441 //#define MB_TYPE_GMC 0x10
443 #define CANDIDATE_MB_TYPE_DIRECT 0x10
444 #define CANDIDATE_MB_TYPE_FORWARD 0x20
445 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
446 #define CANDIDATE_MB_TYPE_BIDIR 0x80
448 #define CANDIDATE_MB_TYPE_INTER_I 0x100
449 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
450 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
451 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
453 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
455 int block_index[6]; ///< index to current MB in block based arrays with edges
459 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
461 /** matrix transmitted in the bitstream */
462 uint16_t intra_matrix[64];
463 uint16_t chroma_intra_matrix[64];
464 uint16_t inter_matrix[64];
465 uint16_t chroma_inter_matrix[64];
466 #define QUANT_BIAS_SHIFT 8
467 int intra_quant_bias; ///< bias for the quantizer
468 int inter_quant_bias; ///< bias for the quantizer
469 int min_qcoeff; ///< minimum encodable coefficient
470 int max_qcoeff; ///< maximum encodable coefficient
471 int ac_esc_length; ///< num of bits needed to encode the longest esc
472 uint8_t *intra_ac_vlc_length;
473 uint8_t *intra_ac_vlc_last_length;
474 uint8_t *inter_ac_vlc_length;
475 uint8_t *inter_ac_vlc_last_length;
476 uint8_t *luma_dc_vlc_length;
477 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
481 /** precomputed matrix (combine qscale and DCT renorm) */
482 int (*q_intra_matrix)[64];
483 int (*q_inter_matrix)[64];
484 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
485 uint16_t (*q_intra_matrix16)[2][64];
486 uint16_t (*q_inter_matrix16)[2][64];
488 /* noise reduction */
489 int (*dct_error_sum)[64];
491 uint16_t (*dct_offset)[64];
493 void *opaque; ///< private data for the user
495 /* bit rate control */
497 int frame_bits; ///< bits used for the current frame
498 int next_lambda; ///< next lambda used for retrying to encode a frame
499 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
501 /* statistics, used for 2-pass encoding */
510 int misc_bits; ///< cbp, mb_type
511 int last_bits; ///< temp var used for calculating the above vars
513 /* error concealment / resync */
514 int resync_mb_x; ///< x position of last resync marker
515 int resync_mb_y; ///< y position of last resync marker
516 GetBitContext last_resync_gb; ///< used to search for the next resync marker
517 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
518 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
521 ParseContext parse_context;
525 int obmc; ///< overlapped block motion compensation
526 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
527 int mb_info; ///< interval for outputting info about mb offsets as side data
528 int prev_mb_info, last_mb_info;
529 uint8_t *mb_info_ptr;
532 /* H.263+ specific */
533 int umvplus; ///< == H263+ && unrestricted_mv
534 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
535 int h263_slice_structured;
536 int alt_inter_vlc; ///< alternative inter vlc
542 int time_increment_bits; ///< number of bits to represent the fractional part of time
544 int time_base; ///< time in seconds of last I,P,S Frame
545 int64_t time; ///< time of current frame
546 int64_t last_non_b_time;
547 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
548 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
549 uint16_t pp_field_time;
550 uint16_t pb_field_time; ///< like above, just for interlaced
552 int vol_sprite_usage;
557 int sprite_brightness_change;
558 int num_sprite_warping_points;
559 int real_sprite_warping_points;
560 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
561 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
562 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
563 int sprite_shift[2]; ///< sprite shift [isChroma]
566 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
569 int enhancement_type;
572 int aspect_ratio_info; //FIXME remove
573 int sprite_warping_accuracy;
574 int low_latency_sprite;
575 int data_partitioning; ///< data partitioning flag from header
576 int partitioned_frame; ///< is current frame partitioned
577 int rvlc; ///< reversible vlc
578 int resync_marker; ///< could this stream contain resync markers
579 int low_delay; ///< no reordering needed / has no b-frames
581 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
582 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
583 int use_intra_dc_vlc;
584 PutBitContext tex_pb; ///< used for data partitioned VOPs
585 PutBitContext pb2; ///< used for data partitioned VOPs
587 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
588 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
589 int cplx_estimation_trash_i;
590 int cplx_estimation_trash_p;
591 int cplx_estimation_trash_b;
593 /* divx specific, used to workaround (many) bugs in divx5 */
597 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
598 int bitstream_buffer_size;
599 unsigned int allocated_bitstream_buffer_size;
603 /* lavc specific stuff, used to workaround bugs in libavcodec */
607 int rv10_version; ///< RV10 version: 0 or 3
608 int rv10_first_dc_coded[3];
609 int orig_width, orig_height;
612 struct MJpegContext *mjpeg_ctx;
613 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
614 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
616 /* MSMPEG4 specific */
619 int rl_chroma_table_index;
621 int use_skip_mb_code;
622 int slice_height; ///< in macroblocks
623 int first_slice_line; ///< used in mpeg4 too to handle resync markers
624 int flipflop_rounding;
625 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
627 int esc3_level_length;
629 /** [mb_intra][isChroma][level][run][last] */
630 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
631 int inter_intra_pred;
634 /* decompression specific */
638 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
639 int last_mv_dir; ///< last mv_dir, used for b frame encoding
640 int broken_link; ///< no_output_of_prior_pics_flag
641 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
643 /* MPEG-2-specific - I wished not to have to support this mess. */
644 int progressive_sequence;
645 int mpeg_f_code[2][2];
646 int picture_structure;
648 #define PICT_TOP_FIELD 1
649 #define PICT_BOTTOM_FIELD 2
652 int intra_dc_precision;
653 int frame_pred_frame_dct;
655 int concealment_motion_vectors;
657 int intra_vlc_format;
659 int repeat_first_field;
665 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
668 int progressive_frame;
672 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
673 int drop_frame_timecode; ///< timecode is in drop frame format.
674 int scan_offset; ///< reserve space for SVCD scan offset user data.
679 uint8_t *ptr_lastgob;
680 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
681 int16_t (*pblocks[12])[64];
683 int16_t (*block)[64]; ///< points to one of the following blocks
684 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
685 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
687 #define SLICE_ERROR -1
688 #define SLICE_END -2 ///<end marker found
689 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
691 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
692 int16_t *block/*align 16*/, int n, int qscale);
693 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
694 int16_t *block/*align 16*/, int n, int qscale);
695 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
696 int16_t *block/*align 16*/, int n, int qscale);
697 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
698 int16_t *block/*align 16*/, int n, int qscale);
699 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
700 int16_t *block/*align 16*/, int n, int qscale);
701 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
702 int16_t *block/*align 16*/, int n, int qscale);
703 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
704 int16_t *block/*align 16*/, int n, int qscale);
705 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
706 int16_t *block/*align 16*/, int n, int qscale);
707 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
708 int16_t *block/*align 16*/, int n, int qscale);
709 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
710 int16_t *block/*align 16*/, int n, int qscale);
711 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
712 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
713 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
715 int mpv_flags; ///< flags set by private options
716 int quantizer_noise_shaping;
718 /* temp buffers for rate control */
719 float *cplx_tab, *bits_tab;
721 /* flag to indicate a reinitialization is required, e.g. after
722 * a frame size change */
728 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
729 ((pic && pic >= old_ctx->picture && \
730 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
731 &new_ctx->picture[pic - old_ctx->picture] : NULL)
733 /* mpegvideo_enc common options */
734 #define FF_MPV_FLAG_SKIP_RD 0x0001
735 #define FF_MPV_FLAG_STRICT_GOP 0x0002
736 #define FF_MPV_FLAG_QP_RD 0x0004
737 #define FF_MPV_FLAG_CBP_RD 0x0008
739 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
740 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
741 #define FF_MPV_COMMON_OPTS \
742 { "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" },\
743 { "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" },\
744 { "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" },\
745 { "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" },\
746 { "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" },\
747 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
748 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
749 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
750 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
751 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
753 extern const AVOption ff_mpv_generic_options[];
755 #define FF_MPV_GENERIC_CLASS(name) \
756 static const AVClass name ## _class = {\
757 .class_name = #name " encoder",\
758 .item_name = av_default_item_name,\
759 .option = ff_mpv_generic_options,\
760 .version = LIBAVUTIL_VERSION_INT,\
764 * Set the given MpegEncContext to common defaults (same for encoding
765 * and decoding). The changed fields will not depend upon the prior
766 * state of the MpegEncContext.
768 void ff_MPV_common_defaults(MpegEncContext *s);
770 void ff_MPV_decode_defaults(MpegEncContext *s);
771 int ff_MPV_common_init(MpegEncContext *s);
772 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
773 int ff_MPV_common_frame_size_change(MpegEncContext *s);
774 void ff_MPV_common_end(MpegEncContext *s);
775 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
776 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
777 void ff_MPV_frame_end(MpegEncContext *s);
778 int ff_MPV_encode_init(AVCodecContext *avctx);
779 int ff_MPV_encode_end(AVCodecContext *avctx);
780 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
781 const AVFrame *frame, int *got_packet);
782 void ff_MPV_encode_init_x86(MpegEncContext *s);
783 void ff_MPV_common_init_x86(MpegEncContext *s);
784 void ff_MPV_common_init_axp(MpegEncContext *s);
785 void ff_MPV_common_init_arm(MpegEncContext *s);
786 void ff_MPV_common_init_altivec(MpegEncContext *s);
787 void ff_MPV_common_init_bfin(MpegEncContext *s);
788 void ff_clean_intra_table_entries(MpegEncContext *s);
789 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
790 Picture *last, int y, int h, int picture_structure,
791 int first_field, int draw_edges, int low_delay,
792 int v_edge_pos, int h_edge_pos);
793 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
794 void ff_mpeg_flush(AVCodecContext *avctx);
795 void ff_print_debug_info(MpegEncContext *s, Picture *p);
796 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
797 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
798 int ff_find_unused_picture(MpegEncContext *s, int shared);
799 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
800 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
801 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
802 void ff_MPV_report_decode_progress(MpegEncContext *s);
803 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
804 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
805 void ff_set_qscale(MpegEncContext * s, int qscale);
807 void ff_mpeg_er_frame_start(MpegEncContext *s);
809 int ff_dct_common_init(MpegEncContext *s);
810 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
811 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
812 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
814 void ff_init_block_index(MpegEncContext *s);
816 void ff_MPV_motion(MpegEncContext *s,
817 uint8_t *dest_y, uint8_t *dest_cb,
818 uint8_t *dest_cr, int dir,
819 uint8_t **ref_picture,
820 op_pixels_func (*pix_op)[4],
821 qpel_mc_func (*qpix_op)[16]);
824 * Allocate a Picture.
825 * The pixels are allocated/set by calling get_buffer() if shared = 0.
827 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
829 extern const enum AVPixelFormat ff_pixfmt_list_420[];
832 * permute block according to permuatation.
833 * @param last last non zero element in scantable order
835 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
837 static inline void ff_update_block_index(MpegEncContext *s){
838 const int block_size = 8;
840 s->block_index[0]+=2;
841 s->block_index[1]+=2;
842 s->block_index[2]+=2;
843 s->block_index[3]+=2;
846 s->dest[0]+= 2*block_size;
847 s->dest[1]+= block_size;
848 s->dest[2]+= block_size;
851 static inline int get_bits_diff(MpegEncContext *s){
852 const int bits= put_bits_count(&s->pb);
853 const int last= s->last_bits;
860 static inline int ff_h263_round_chroma(int x){
861 static const uint8_t h263_chroma_roundtab[16] = {
862 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
863 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
865 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
869 void ff_estimate_p_frame_motion(MpegEncContext * s,
871 void ff_estimate_b_frame_motion(MpegEncContext * s,
873 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
874 void ff_fix_long_p_mvs(MpegEncContext * s);
875 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
876 int16_t (*mv_table)[2], int f_code, int type, int truncate);
877 int ff_init_me(MpegEncContext *s);
878 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
879 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
880 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
881 int ref_mv_scale, int size, int h);
882 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
883 int ref_index, int size, int h, int add_rate);
886 extern const uint8_t ff_mpeg1_dc_scale_table[128];
887 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
889 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
890 void ff_mpeg1_encode_mb(MpegEncContext *s,
891 int16_t block[6][64],
892 int motion_x, int motion_y);
893 void ff_mpeg1_encode_init(MpegEncContext *s);
894 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
895 void ff_mpeg1_clean_buffers(MpegEncContext *s);
896 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
898 extern const uint8_t ff_aic_dc_scale_table[32];
899 extern const uint8_t ff_h263_chroma_qscale_table[32];
900 extern const uint8_t ff_h263_loop_filter_strength[32];
903 void ff_h261_loop_filter(MpegEncContext *s);
904 void ff_h261_reorder_mb_index(MpegEncContext* s);
905 void ff_h261_encode_mb(MpegEncContext *s,
906 int16_t block[6][64],
907 int motion_x, int motion_y);
908 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
909 void ff_h261_encode_init(MpegEncContext *s);
910 int ff_h261_get_picture_format(int width, int height);
914 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
915 int ff_rv_decode_dc(MpegEncContext *s, int n);
916 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
920 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
921 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
922 void ff_msmpeg4_encode_mb(MpegEncContext * s,
923 int16_t block[6][64],
924 int motion_x, int motion_y);
925 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
926 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
927 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
928 void ff_msmpeg4_encode_init(MpegEncContext *s);
929 int ff_wmv2_decode_picture_header(MpegEncContext * s);
930 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
931 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
932 void ff_mspel_motion(MpegEncContext *s,
933 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
934 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
935 int motion_x, int motion_y, int h);
936 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
937 void ff_wmv2_encode_mb(MpegEncContext * s,
938 int16_t block[6][64],
939 int motion_x, int motion_y);
941 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
942 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
944 #endif /* AVCODEC_MPEGVIDEO_H */