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"
38 #include "ratecontrol.h"
40 #include "mpeg12data.h"
45 #include "libavutil/opt.h"
47 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
56 #define MPEG_BUF_SIZE (16 * 1024)
58 #define QMAT_SHIFT_MMX 16
64 #define MAX_THREADS 16
66 #define MAX_PICTURE_COUNT 32
68 #define ME_MAP_SIZE 64
69 #define ME_MAP_SHIFT 3
70 #define ME_MAP_MV_BITS 11
72 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
74 #define INPLACE_OFFSET 16
77 #define SEQ_END_CODE 0x000001b7
78 #define SEQ_START_CODE 0x000001b3
79 #define GOP_START_CODE 0x000001b8
80 #define PICTURE_START_CODE 0x00000100
81 #define SLICE_MIN_START_CODE 0x00000101
82 #define SLICE_MAX_START_CODE 0x000001af
83 #define EXT_START_CODE 0x000001b5
84 #define USER_START_CODE 0x000001b2
87 * Value of Picture.reference when Picture is not a reference picture, but
88 * is held for delayed output.
90 #define DELAYED_PIC_REF 4
92 struct MpegEncContext;
97 typedef struct Picture{
101 AVBufferRef *qscale_table_buf;
102 int8_t *qscale_table;
104 AVBufferRef *motion_val_buf[2];
105 int16_t (*motion_val[2])[2];
107 AVBufferRef *mb_type_buf;
110 AVBufferRef *mbskip_table_buf;
111 uint8_t *mbskip_table;
113 AVBufferRef *ref_index_buf[2];
114 int8_t *ref_index[2];
116 AVBufferRef *mb_var_buf;
117 uint16_t *mb_var; ///< Table for MB variances
119 AVBufferRef *mc_mb_var_buf;
120 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
122 AVBufferRef *mb_mean_buf;
123 uint8_t *mb_mean; ///< Table for MB luminance
125 AVBufferRef *hwaccel_priv_buf;
127 * hardware accelerator private data
129 void *hwaccel_picture_private;
131 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
132 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
133 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
134 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
135 #define IS_INTRA(a) ((a)&7)
136 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
137 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
138 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
139 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
140 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
141 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
142 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
143 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
144 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
145 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
146 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
147 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
148 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
149 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
150 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
151 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
152 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
153 #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
154 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
156 int field_poc[2]; ///< h264 top/bottom POC
157 int poc; ///< h264 frame POC
158 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
159 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
160 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
161 pic_num & max_pic_num; long -> long_pic_num) */
162 int long_ref; ///< 1->long term reference 0->short term reference
163 int ref_poc[2][2][32]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
164 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
165 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
166 int field_picture; ///< whether or not the picture was encoded in separate fields
168 int mb_var_sum; ///< sum of MB variance for current frame
169 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
171 int b_frame_score; /* */
172 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
176 int recovered; ///< Picture at IDR or recovery point + recovery count
180 * Motion estimation context.
182 typedef struct MotionEstContext{
183 AVCodecContext *avctx;
184 int skip; ///< set if ME is skipped for the current MB
185 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
186 int direct_basis_mv[4][2];
187 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
192 uint32_t *map; ///< map to avoid duplicate evaluations
193 uint32_t *score_map; ///< map to store the scores
194 unsigned map_generation;
195 int pre_penalty_factor;
196 int penalty_factor; /**< an estimate of the bits required to
197 code a given mv value, e.g. (1,0) takes
198 more bits than (0,0). We have to
199 estimate whether any reduction in
200 residual is worth the extra bits. */
201 int sub_penalty_factor;
202 int mb_penalty_factor;
206 int pre_pass; ///< = 1 for the pre pass
218 /* temp variables for picture complexity calculation */
219 int mc_mb_var_sum_temp;
221 int scene_change_score;
222 /* cmp, chroma_cmp;*/
223 op_pixels_func (*hpel_put)[4];
224 op_pixels_func (*hpel_avg)[4];
225 qpel_mc_func (*qpel_put)[16];
226 qpel_mc_func (*qpel_avg)[16];
227 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
228 uint8_t *current_mv_penalty;
229 int (*sub_motion_search)(struct MpegEncContext * s,
230 int *mx_ptr, int *my_ptr, int dmin,
231 int src_index, int ref_index,
238 typedef struct MpegEncContext {
240 struct AVCodecContext *avctx;
241 /* the following parameters must be initialized before encoding */
242 int width, height;///< picture size. must be a multiple of 16
244 int intra_only; ///< if true, only intra pictures are generated
245 int bit_rate; ///< wanted bit rate
246 enum OutputFormat out_format; ///< output format
247 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
248 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
250 /* the following codec id fields are deprecated in favor of codec_id */
251 int h263_plus; ///< h263 plus headers
252 int h263_flv; ///< use flv h263 header
254 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
255 int fixed_qscale; ///< fixed qscale if non zero
256 int encoding; ///< true if we are encoding (vs decoding)
257 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
258 int flags2; ///< AVCodecContext.flags2
259 int max_b_frames; ///< max number of b-frames for encoding
260 int luma_elim_threshold;
261 int chroma_elim_threshold;
262 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
263 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
264 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
265 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
266 /* the following fields are managed internally by the encoder */
268 /* sequence parameters */
269 int context_initialized;
270 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
271 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
272 int picture_number; //FIXME remove, unclear definition
273 int picture_in_gop_number; ///< 0-> first pic in gop, ...
274 int mb_width, mb_height; ///< number of MBs horizontally & vertically
275 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
276 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
277 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
278 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
279 int mb_num; ///< number of MBs of a picture
280 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
281 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
282 Picture *picture; ///< main picture buffer
283 Picture **input_picture; ///< next pictures on display order for encoding
284 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
286 int y_dc_scale, c_dc_scale;
288 int block_last_index[12]; ///< last non zero coefficient in block
289 int h263_aic; ///< Advanded INTRA Coding (AIC)
292 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
293 ScanTable intra_scantable;
294 ScanTable intra_h_scantable;
295 ScanTable intra_v_scantable;
297 /* WARNING: changes above this line require updates to hardcoded
298 * offsets used in asm. */
300 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
302 * pts difference between the first and second input frame, used for
303 * calculating dts of the first frame when there's a delay */
306 * reordered pts to be used as dts for the next output frame when there's
308 int64_t reordered_pts;
313 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
314 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
315 struct MpegEncContext *thread_context[MAX_THREADS];
316 int slice_context_count; ///< number of used thread_contexts
319 * copy of the previous picture structure.
320 * note, linesize & data, might not match the previous picture (for field pictures)
322 Picture last_picture;
325 * copy of the next picture structure.
326 * note, linesize & data, might not match the next picture (for field pictures)
328 Picture next_picture;
331 * copy of the source picture structure for encoding.
332 * note, linesize & data, might not match the source picture (for field pictures)
337 * copy of the current picture structure.
338 * note, linesize & data, might not match the current picture (for field pictures)
340 Picture current_picture; ///< buffer to store the decompressed current picture
342 Picture *last_picture_ptr; ///< pointer to the previous picture.
343 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
344 Picture *current_picture_ptr; ///< pointer to the current picture
345 int last_dc[3]; ///< last DC values for MPEG1
346 int16_t *dc_val_base;
347 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
348 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
349 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
350 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
351 uint8_t *coded_block_base;
352 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
353 int16_t (*ac_val_base)[16];
354 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
355 int mb_skipped; ///< MUST BE SET only during DECODING
356 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
357 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
358 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
359 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
360 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
361 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
362 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
363 uint8_t *obmc_scratchpad;
364 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
367 int chroma_qscale; ///< chroma QP
368 unsigned int lambda; ///< lagrange multipler used in rate distortion
369 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
371 int adaptive_quant; ///< use adaptive quantization
372 int dquant; ///< qscale difference to prev qscale
373 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
374 int last_pict_type; //FIXME removes
375 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
377 int frame_rate_index;
378 int last_lambda_for[5]; ///< last lambda for a specific pict type
379 int skipdct; ///< skip dct and code zero residual
381 /* motion compensation */
382 int unrestricted_mv; ///< mv can point outside of the coded picture
383 int h263_long_vectors; ///< use horrible h263v1 long vector mode
385 DSPContext dsp; ///< pointers for accelerated dsp functions
387 VideoDSPContext vdsp;
388 H263DSPContext h263dsp;
389 int f_code; ///< forward MV resolution
390 int b_code; ///< backward MV resolution for B Frames (mpeg4)
391 int16_t (*p_mv_table_base)[2];
392 int16_t (*b_forw_mv_table_base)[2];
393 int16_t (*b_back_mv_table_base)[2];
394 int16_t (*b_bidir_forw_mv_table_base)[2];
395 int16_t (*b_bidir_back_mv_table_base)[2];
396 int16_t (*b_direct_mv_table_base)[2];
397 int16_t (*p_field_mv_table_base[2][2])[2];
398 int16_t (*b_field_mv_table_base[2][2][2])[2];
399 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
400 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
401 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
402 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
403 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
404 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
405 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
406 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
407 uint8_t (*p_field_select_table[2]);
408 uint8_t (*b_field_select_table[2][2]);
409 int me_method; ///< ME algorithm
411 #define MV_DIR_FORWARD 1
412 #define MV_DIR_BACKWARD 2
413 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
415 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
416 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
417 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
418 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
419 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
420 /**motion vectors for a macroblock
421 first coordinate : 0 = forward 1 = backward
422 second " : depend on type
423 third " : 0 = x, 1 = y
426 int field_select[2][2];
427 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
428 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
429 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
433 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
434 for b-frames rounding mode is always 0 */
436 /* macroblock layer */
440 uint16_t *mb_type; ///< Table for candidate MB types for encoding
441 #define CANDIDATE_MB_TYPE_INTRA 0x01
442 #define CANDIDATE_MB_TYPE_INTER 0x02
443 #define CANDIDATE_MB_TYPE_INTER4V 0x04
444 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
445 //#define MB_TYPE_GMC 0x10
447 #define CANDIDATE_MB_TYPE_DIRECT 0x10
448 #define CANDIDATE_MB_TYPE_FORWARD 0x20
449 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
450 #define CANDIDATE_MB_TYPE_BIDIR 0x80
452 #define CANDIDATE_MB_TYPE_INTER_I 0x100
453 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
454 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
455 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
457 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
459 int block_index[6]; ///< index to current MB in block based arrays with edges
463 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
465 /** matrix transmitted in the bitstream */
466 uint16_t intra_matrix[64];
467 uint16_t chroma_intra_matrix[64];
468 uint16_t inter_matrix[64];
469 uint16_t chroma_inter_matrix[64];
470 #define QUANT_BIAS_SHIFT 8
471 int intra_quant_bias; ///< bias for the quantizer
472 int inter_quant_bias; ///< bias for the quantizer
473 int min_qcoeff; ///< minimum encodable coefficient
474 int max_qcoeff; ///< maximum encodable coefficient
475 int ac_esc_length; ///< num of bits needed to encode the longest esc
476 uint8_t *intra_ac_vlc_length;
477 uint8_t *intra_ac_vlc_last_length;
478 uint8_t *inter_ac_vlc_length;
479 uint8_t *inter_ac_vlc_last_length;
480 uint8_t *luma_dc_vlc_length;
481 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
485 /** precomputed matrix (combine qscale and DCT renorm) */
486 int (*q_intra_matrix)[64];
487 int (*q_inter_matrix)[64];
488 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
489 uint16_t (*q_intra_matrix16)[2][64];
490 uint16_t (*q_inter_matrix16)[2][64];
492 /* noise reduction */
493 int (*dct_error_sum)[64];
495 uint16_t (*dct_offset)[64];
497 void *opaque; ///< private data for the user
499 /* bit rate control */
501 int frame_bits; ///< bits used for the current frame
502 int next_lambda; ///< next lambda used for retrying to encode a frame
503 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
505 /* statistics, used for 2-pass encoding */
514 int misc_bits; ///< cbp, mb_type
515 int last_bits; ///< temp var used for calculating the above vars
517 /* error concealment / resync */
518 int resync_mb_x; ///< x position of last resync marker
519 int resync_mb_y; ///< y position of last resync marker
520 GetBitContext last_resync_gb; ///< used to search for the next resync marker
521 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
522 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
525 ParseContext parse_context;
529 int obmc; ///< overlapped block motion compensation
530 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
531 int mb_info; ///< interval for outputting info about mb offsets as side data
532 int prev_mb_info, last_mb_info;
533 uint8_t *mb_info_ptr;
536 /* H.263+ specific */
537 int umvplus; ///< == H263+ && unrestricted_mv
538 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
539 int h263_slice_structured;
540 int alt_inter_vlc; ///< alternative inter vlc
546 int time_increment_bits; ///< number of bits to represent the fractional part of time
548 int time_base; ///< time in seconds of last I,P,S Frame
549 int64_t time; ///< time of current frame
550 int64_t last_non_b_time;
551 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
552 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
553 uint16_t pp_field_time;
554 uint16_t pb_field_time; ///< like above, just for interlaced
556 int vol_sprite_usage;
561 int sprite_brightness_change;
562 int num_sprite_warping_points;
563 int real_sprite_warping_points;
564 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
565 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
566 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
567 int sprite_shift[2]; ///< sprite shift [isChroma]
570 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
573 int enhancement_type;
576 int aspect_ratio_info; //FIXME remove
577 int sprite_warping_accuracy;
578 int low_latency_sprite;
579 int data_partitioning; ///< data partitioning flag from header
580 int partitioned_frame; ///< is current frame partitioned
581 int rvlc; ///< reversible vlc
582 int resync_marker; ///< could this stream contain resync markers
583 int low_delay; ///< no reordering needed / has no b-frames
585 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
586 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
587 int use_intra_dc_vlc;
588 PutBitContext tex_pb; ///< used for data partitioned VOPs
589 PutBitContext pb2; ///< used for data partitioned VOPs
591 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
592 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
593 int cplx_estimation_trash_i;
594 int cplx_estimation_trash_p;
595 int cplx_estimation_trash_b;
597 /* divx specific, used to workaround (many) bugs in divx5 */
601 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
602 int bitstream_buffer_size;
603 unsigned int allocated_bitstream_buffer_size;
607 /* lavc specific stuff, used to workaround bugs in libavcodec */
611 int rv10_version; ///< RV10 version: 0 or 3
612 int rv10_first_dc_coded[3];
613 int orig_width, orig_height;
616 struct MJpegContext *mjpeg_ctx;
617 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
618 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
620 /* MSMPEG4 specific */
623 int rl_chroma_table_index;
625 int use_skip_mb_code;
626 int slice_height; ///< in macroblocks
627 int first_slice_line; ///< used in mpeg4 too to handle resync markers
628 int flipflop_rounding;
629 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
631 int esc3_level_length;
633 /** [mb_intra][isChroma][level][run][last] */
634 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
635 int inter_intra_pred;
638 /* decompression specific */
642 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
643 int last_mv_dir; ///< last mv_dir, used for b frame encoding
644 int broken_link; ///< no_output_of_prior_pics_flag
645 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
647 /* MPEG-2-specific - I wished not to have to support this mess. */
648 int progressive_sequence;
649 int mpeg_f_code[2][2];
650 int picture_structure;
652 #define PICT_TOP_FIELD 1
653 #define PICT_BOTTOM_FIELD 2
656 int intra_dc_precision;
657 int frame_pred_frame_dct;
659 int concealment_motion_vectors;
661 int intra_vlc_format;
663 int repeat_first_field;
669 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
672 int progressive_frame;
676 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
677 int drop_frame_timecode; ///< timecode is in drop frame format.
678 int scan_offset; ///< reserve space for SVCD scan offset user data.
683 uint8_t *ptr_lastgob;
684 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
685 int16_t (*pblocks[12])[64];
687 int16_t (*block)[64]; ///< points to one of the following blocks
688 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
689 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
691 #define SLICE_ERROR -1
692 #define SLICE_END -2 ///<end marker found
693 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
695 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
696 int16_t *block/*align 16*/, int n, int qscale);
697 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
698 int16_t *block/*align 16*/, int n, int qscale);
699 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
700 int16_t *block/*align 16*/, int n, int qscale);
701 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
702 int16_t *block/*align 16*/, int n, int qscale);
703 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
704 int16_t *block/*align 16*/, int n, int qscale);
705 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
706 int16_t *block/*align 16*/, int n, int qscale);
707 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
708 int16_t *block/*align 16*/, int n, int qscale);
709 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
710 int16_t *block/*align 16*/, int n, int qscale);
711 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
712 int16_t *block/*align 16*/, int n, int qscale);
713 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
714 int16_t *block/*align 16*/, int n, int qscale);
715 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
716 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
717 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
719 int mpv_flags; ///< flags set by private options
720 int quantizer_noise_shaping;
722 /* temp buffers for rate control */
723 float *cplx_tab, *bits_tab;
725 /* flag to indicate a reinitialization is required, e.g. after
726 * a frame size change */
732 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
733 ((pic && pic >= old_ctx->picture && \
734 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
735 &new_ctx->picture[pic - old_ctx->picture] : NULL)
737 /* mpegvideo_enc common options */
738 #define FF_MPV_FLAG_SKIP_RD 0x0001
739 #define FF_MPV_FLAG_STRICT_GOP 0x0002
740 #define FF_MPV_FLAG_QP_RD 0x0004
741 #define FF_MPV_FLAG_CBP_RD 0x0008
743 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
744 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
745 #define FF_MPV_COMMON_OPTS \
746 { "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" },\
747 { "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" },\
748 { "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" },\
749 { "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" },\
750 { "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" },\
751 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
752 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
753 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
754 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
755 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
757 extern const AVOption ff_mpv_generic_options[];
759 #define FF_MPV_GENERIC_CLASS(name) \
760 static const AVClass name ## _class = {\
761 .class_name = #name " encoder",\
762 .item_name = av_default_item_name,\
763 .option = ff_mpv_generic_options,\
764 .version = LIBAVUTIL_VERSION_INT,\
768 * Set the given MpegEncContext to common defaults (same for encoding
769 * and decoding). The changed fields will not depend upon the prior
770 * state of the MpegEncContext.
772 void ff_MPV_common_defaults(MpegEncContext *s);
774 void ff_MPV_decode_defaults(MpegEncContext *s);
775 int ff_MPV_common_init(MpegEncContext *s);
776 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
777 int ff_MPV_common_frame_size_change(MpegEncContext *s);
778 void ff_MPV_common_end(MpegEncContext *s);
779 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
780 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
781 void ff_MPV_frame_end(MpegEncContext *s);
782 int ff_MPV_encode_init(AVCodecContext *avctx);
783 int ff_MPV_encode_end(AVCodecContext *avctx);
784 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
785 const AVFrame *frame, int *got_packet);
786 void ff_MPV_encode_init_x86(MpegEncContext *s);
787 void ff_MPV_common_init_x86(MpegEncContext *s);
788 void ff_MPV_common_init_axp(MpegEncContext *s);
789 void ff_MPV_common_init_arm(MpegEncContext *s);
790 void ff_MPV_common_init_bfin(MpegEncContext *s);
791 void ff_MPV_common_init_ppc(MpegEncContext *s);
792 void ff_clean_intra_table_entries(MpegEncContext *s);
793 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
794 Picture *last, int y, int h, int picture_structure,
795 int first_field, int draw_edges, int low_delay,
796 int v_edge_pos, int h_edge_pos);
797 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
798 void ff_mpeg_flush(AVCodecContext *avctx);
799 void ff_print_debug_info(MpegEncContext *s, Picture *p);
800 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
801 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
802 int ff_find_unused_picture(MpegEncContext *s, int shared);
803 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
804 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
805 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
806 void ff_MPV_report_decode_progress(MpegEncContext *s);
807 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
808 void ff_set_qscale(MpegEncContext * s, int qscale);
810 void ff_mpeg_er_frame_start(MpegEncContext *s);
812 int ff_dct_common_init(MpegEncContext *s);
813 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
814 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
815 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
817 void ff_init_block_index(MpegEncContext *s);
819 void ff_MPV_motion(MpegEncContext *s,
820 uint8_t *dest_y, uint8_t *dest_cb,
821 uint8_t *dest_cr, int dir,
822 uint8_t **ref_picture,
823 op_pixels_func (*pix_op)[4],
824 qpel_mc_func (*qpix_op)[16]);
827 * Allocate a Picture.
828 * The pixels are allocated/set by calling get_buffer() if shared = 0.
830 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
832 extern const enum AVPixelFormat ff_pixfmt_list_420[];
835 * permute block according to permuatation.
836 * @param last last non zero element in scantable order
838 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
840 static inline void ff_update_block_index(MpegEncContext *s){
841 const int block_size = 8;
843 s->block_index[0]+=2;
844 s->block_index[1]+=2;
845 s->block_index[2]+=2;
846 s->block_index[3]+=2;
849 s->dest[0]+= 2*block_size;
850 s->dest[1]+= block_size;
851 s->dest[2]+= block_size;
854 static inline int get_bits_diff(MpegEncContext *s){
855 const int bits= put_bits_count(&s->pb);
856 const int last= s->last_bits;
863 static inline int ff_h263_round_chroma(int x){
864 static const uint8_t h263_chroma_roundtab[16] = {
865 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
866 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
868 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
872 void ff_estimate_p_frame_motion(MpegEncContext * s,
874 void ff_estimate_b_frame_motion(MpegEncContext * s,
876 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
877 void ff_fix_long_p_mvs(MpegEncContext * s);
878 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
879 int16_t (*mv_table)[2], int f_code, int type, int truncate);
880 int ff_init_me(MpegEncContext *s);
881 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
882 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
883 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
884 int ref_mv_scale, int size, int h);
885 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
886 int ref_index, int size, int h, int add_rate);
889 extern const uint8_t ff_mpeg1_dc_scale_table[128];
890 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
892 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
893 void ff_mpeg1_encode_mb(MpegEncContext *s,
894 int16_t block[6][64],
895 int motion_x, int motion_y);
896 void ff_mpeg1_encode_init(MpegEncContext *s);
897 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
899 extern const uint8_t ff_aic_dc_scale_table[32];
900 extern const uint8_t ff_h263_chroma_qscale_table[32];
903 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
904 int ff_rv_decode_dc(MpegEncContext *s, int n);
905 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
909 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
910 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
911 void ff_msmpeg4_encode_mb(MpegEncContext * s,
912 int16_t block[6][64],
913 int motion_x, int motion_y);
914 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
915 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
916 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
917 void ff_msmpeg4_encode_init(MpegEncContext *s);
918 int ff_wmv2_decode_picture_header(MpegEncContext * s);
919 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
920 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
921 void ff_mspel_motion(MpegEncContext *s,
922 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
923 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
924 int motion_x, int motion_y, int h);
925 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
926 void ff_wmv2_encode_mb(MpegEncContext * s,
927 int16_t block[6][64],
928 int motion_x, int motion_y);
930 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
931 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
933 #endif /* AVCODEC_MPEGVIDEO_H */