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
34 #include "error_resilience.h"
39 #include "mpegvideodsp.h"
41 #include "ratecontrol.h"
43 #include "mpeg12data.h"
49 #include "libavutil/opt.h"
51 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
60 #define MPEG_BUF_SIZE (16 * 1024)
62 #define QMAT_SHIFT_MMX 16
68 #define MAX_THREADS 16
70 #define MAX_PICTURE_COUNT 32
72 #define MAX_B_FRAMES 16
74 #define ME_MAP_SIZE 64
75 #define ME_MAP_SHIFT 3
76 #define ME_MAP_MV_BITS 11
78 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
80 #define INPLACE_OFFSET 16
83 #define SEQ_END_CODE 0x000001b7
84 #define SEQ_START_CODE 0x000001b3
85 #define GOP_START_CODE 0x000001b8
86 #define PICTURE_START_CODE 0x00000100
87 #define SLICE_MIN_START_CODE 0x00000101
88 #define SLICE_MAX_START_CODE 0x000001af
89 #define EXT_START_CODE 0x000001b5
90 #define USER_START_CODE 0x000001b2
93 extern const uint8_t ff_alternate_horizontal_scan[64];
94 extern const uint8_t ff_alternate_vertical_scan[64];
96 struct MpegEncContext;
101 typedef struct Picture{
105 AVBufferRef *qscale_table_buf;
106 int8_t *qscale_table;
108 AVBufferRef *motion_val_buf[2];
109 int16_t (*motion_val[2])[2];
111 AVBufferRef *mb_type_buf;
112 uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
114 AVBufferRef *mbskip_table_buf;
115 uint8_t *mbskip_table;
117 AVBufferRef *ref_index_buf[2];
118 int8_t *ref_index[2];
120 AVBufferRef *mb_var_buf;
121 uint16_t *mb_var; ///< Table for MB variances
123 AVBufferRef *mc_mb_var_buf;
124 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
126 AVBufferRef *mb_mean_buf;
127 uint8_t *mb_mean; ///< Table for MB luminance
129 AVBufferRef *hwaccel_priv_buf;
131 * hardware accelerator private data
133 void *hwaccel_picture_private;
135 int field_picture; ///< whether or not the picture was encoded in separate fields
137 int mb_var_sum; ///< sum of MB variance for current frame
138 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
140 int b_frame_score; /* */
141 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
148 * Motion estimation context.
150 typedef struct MotionEstContext{
151 AVCodecContext *avctx;
152 int skip; ///< set if ME is skipped for the current MB
153 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
154 int direct_basis_mv[4][2];
155 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
160 uint32_t *map; ///< map to avoid duplicate evaluations
161 uint32_t *score_map; ///< map to store the scores
162 unsigned map_generation;
163 int pre_penalty_factor;
164 int penalty_factor; /**< an estimate of the bits required to
165 code a given mv value, e.g. (1,0) takes
166 more bits than (0,0). We have to
167 estimate whether any reduction in
168 residual is worth the extra bits. */
169 int sub_penalty_factor;
170 int mb_penalty_factor;
174 int pre_pass; ///< = 1 for the pre pass
186 /* temp variables for picture complexity calculation */
187 int mc_mb_var_sum_temp;
189 int scene_change_score;
190 /* cmp, chroma_cmp;*/
191 op_pixels_func (*hpel_put)[4];
192 op_pixels_func (*hpel_avg)[4];
193 qpel_mc_func (*qpel_put)[16];
194 qpel_mc_func (*qpel_avg)[16];
195 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
196 uint8_t *current_mv_penalty;
197 int (*sub_motion_search)(struct MpegEncContext * s,
198 int *mx_ptr, int *my_ptr, int dmin,
199 int src_index, int ref_index,
206 typedef struct MpegEncContext {
209 int y_dc_scale, c_dc_scale;
211 int block_last_index[12]; ///< last non zero coefficient in block
212 int h263_aic; ///< Advanded INTRA Coding (AIC)
215 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
216 ScanTable intra_scantable;
217 ScanTable intra_h_scantable;
218 ScanTable intra_v_scantable;
220 /* WARNING: changes above this line require updates to hardcoded
221 * offsets used in asm. */
223 struct AVCodecContext *avctx;
224 /* the following parameters must be initialized before encoding */
225 int width, height;///< picture size. must be a multiple of 16
227 int intra_only; ///< if true, only intra pictures are generated
228 int bit_rate; ///< wanted bit rate
229 enum OutputFormat out_format; ///< output format
230 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
231 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
233 /* the following codec id fields are deprecated in favor of codec_id */
234 int h263_plus; ///< h263 plus headers
235 int h263_flv; ///< use flv h263 header
237 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
238 int fixed_qscale; ///< fixed qscale if non zero
239 int encoding; ///< true if we are encoding (vs decoding)
240 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
241 int flags2; ///< AVCodecContext.flags2
242 int max_b_frames; ///< max number of b-frames for encoding
243 int luma_elim_threshold;
244 int chroma_elim_threshold;
245 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
246 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
247 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
248 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
249 /* the following fields are managed internally by the encoder */
251 /* sequence parameters */
252 int context_initialized;
253 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
254 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
255 int picture_number; //FIXME remove, unclear definition
256 int picture_in_gop_number; ///< 0-> first pic in gop, ...
257 int mb_width, mb_height; ///< number of MBs horizontally & vertically
258 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
259 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
260 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
261 int mb_num; ///< number of MBs of a picture
262 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
263 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
264 Picture *picture; ///< main picture buffer
265 Picture **input_picture; ///< next pictures on display order for encoding
266 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
268 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
270 * pts difference between the first and second input frame, used for
271 * calculating dts of the first frame when there's a delay */
274 * reordered pts to be used as dts for the next output frame when there's
276 int64_t reordered_pts;
281 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
282 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
283 struct MpegEncContext *thread_context[MAX_THREADS];
284 int slice_context_count; ///< number of used thread_contexts
287 * copy of the previous picture structure.
288 * note, linesize & data, might not match the previous picture (for field pictures)
290 Picture last_picture;
293 * copy of the next picture structure.
294 * note, linesize & data, might not match the next picture (for field pictures)
296 Picture next_picture;
299 * copy of the source picture structure for encoding.
300 * note, linesize & data, might not match the source picture (for field pictures)
305 * copy of the current picture structure.
306 * note, linesize & data, might not match the current picture (for field pictures)
308 Picture current_picture; ///< buffer to store the decompressed current picture
310 Picture *last_picture_ptr; ///< pointer to the previous picture.
311 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
312 Picture *current_picture_ptr; ///< pointer to the current picture
313 int last_dc[3]; ///< last DC values for MPEG1
314 int16_t *dc_val_base;
315 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
316 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
317 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
318 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
319 uint8_t *coded_block_base;
320 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
321 int16_t (*ac_val_base)[16];
322 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
323 int mb_skipped; ///< MUST BE SET only during DECODING
324 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
325 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
326 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
327 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
328 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
329 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
330 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
331 uint8_t *obmc_scratchpad;
332 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
335 int chroma_qscale; ///< chroma QP
336 unsigned int lambda; ///< lagrange multipler used in rate distortion
337 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
339 int adaptive_quant; ///< use adaptive quantization
340 int dquant; ///< qscale difference to prev qscale
341 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
342 int last_pict_type; //FIXME removes
343 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
345 int frame_rate_index;
346 int last_lambda_for[5]; ///< last lambda for a specific pict type
347 int skipdct; ///< skip dct and code zero residual
349 /* motion compensation */
350 int unrestricted_mv; ///< mv can point outside of the coded picture
351 int h263_long_vectors; ///< use horrible h263v1 long vector mode
353 BlockDSPContext bdsp;
354 DSPContext dsp; ///< pointers for accelerated dsp functions
357 MpegVideoDSPContext mdsp;
359 VideoDSPContext vdsp;
360 H263DSPContext h263dsp;
361 int f_code; ///< forward MV resolution
362 int b_code; ///< backward MV resolution for B Frames (mpeg4)
363 int16_t (*p_mv_table_base)[2];
364 int16_t (*b_forw_mv_table_base)[2];
365 int16_t (*b_back_mv_table_base)[2];
366 int16_t (*b_bidir_forw_mv_table_base)[2];
367 int16_t (*b_bidir_back_mv_table_base)[2];
368 int16_t (*b_direct_mv_table_base)[2];
369 int16_t (*p_field_mv_table_base[2][2])[2];
370 int16_t (*b_field_mv_table_base[2][2][2])[2];
371 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
372 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
373 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
374 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
375 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
376 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
377 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
378 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
379 uint8_t (*p_field_select_table[2]);
380 uint8_t (*b_field_select_table[2][2]);
381 int me_method; ///< ME algorithm
383 #define MV_DIR_FORWARD 1
384 #define MV_DIR_BACKWARD 2
385 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
387 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
388 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
389 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
390 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
391 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
392 /**motion vectors for a macroblock
393 first coordinate : 0 = forward 1 = backward
394 second " : depend on type
395 third " : 0 = x, 1 = y
398 int field_select[2][2];
399 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
400 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
401 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
405 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
406 for b-frames rounding mode is always 0 */
408 /* macroblock layer */
412 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h)
414 int block_index[6]; ///< index to current MB in block based arrays with edges
418 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
420 /** matrix transmitted in the bitstream */
421 uint16_t intra_matrix[64];
422 uint16_t chroma_intra_matrix[64];
423 uint16_t inter_matrix[64];
424 uint16_t chroma_inter_matrix[64];
425 #define QUANT_BIAS_SHIFT 8
426 int intra_quant_bias; ///< bias for the quantizer
427 int inter_quant_bias; ///< bias for the quantizer
428 int min_qcoeff; ///< minimum encodable coefficient
429 int max_qcoeff; ///< maximum encodable coefficient
430 int ac_esc_length; ///< num of bits needed to encode the longest esc
431 uint8_t *intra_ac_vlc_length;
432 uint8_t *intra_ac_vlc_last_length;
433 uint8_t *inter_ac_vlc_length;
434 uint8_t *inter_ac_vlc_last_length;
435 uint8_t *luma_dc_vlc_length;
436 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
440 /** precomputed matrix (combine qscale and DCT renorm) */
441 int (*q_intra_matrix)[64];
442 int (*q_inter_matrix)[64];
443 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
444 uint16_t (*q_intra_matrix16)[2][64];
445 uint16_t (*q_inter_matrix16)[2][64];
447 /* noise reduction */
448 int (*dct_error_sum)[64];
450 uint16_t (*dct_offset)[64];
452 void *opaque; ///< private data for the user
454 /* bit rate control */
456 int frame_bits; ///< bits used for the current frame
457 int next_lambda; ///< next lambda used for retrying to encode a frame
458 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
460 /* statistics, used for 2-pass encoding */
469 int misc_bits; ///< cbp, mb_type
470 int last_bits; ///< temp var used for calculating the above vars
472 /* error concealment / resync */
473 int resync_mb_x; ///< x position of last resync marker
474 int resync_mb_y; ///< y position of last resync marker
475 GetBitContext last_resync_gb; ///< used to search for the next resync marker
476 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
477 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
480 ParseContext parse_context;
484 int obmc; ///< overlapped block motion compensation
485 int mb_info; ///< interval for outputting info about mb offsets as side data
486 int prev_mb_info, last_mb_info;
487 uint8_t *mb_info_ptr;
490 /* H.263+ specific */
491 int umvplus; ///< == H263+ && unrestricted_mv
492 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
493 int h263_slice_structured;
494 int alt_inter_vlc; ///< alternative inter vlc
500 ///< number of bits to represent the fractional part of time (encoder only)
501 int time_increment_bits;
503 int time_base; ///< time in seconds of last I,P,S Frame
504 int64_t time; ///< time of current frame
505 int64_t last_non_b_time;
506 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
507 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
508 uint16_t pp_field_time;
509 uint16_t pb_field_time; ///< like above, just for interlaced
510 int real_sprite_warping_points;
511 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
512 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
515 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
516 int aspect_ratio_info; //FIXME remove
517 int sprite_warping_accuracy;
518 int data_partitioning; ///< data partitioning flag from header
519 int partitioned_frame; ///< is current frame partitioned
520 int low_delay; ///< no reordering needed / has no b-frames
522 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
523 PutBitContext tex_pb; ///< used for data partitioned VOPs
524 PutBitContext pb2; ///< used for data partitioned VOPs
526 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
528 /* divx specific, used to workaround (many) bugs in divx5 */
530 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
531 int bitstream_buffer_size;
532 unsigned int allocated_bitstream_buffer_size;
535 int rv10_version; ///< RV10 version: 0 or 3
536 int rv10_first_dc_coded[3];
537 int orig_width, orig_height;
540 struct MJpegContext *mjpeg_ctx;
542 /* MSMPEG4 specific */
545 int rl_chroma_table_index;
547 int use_skip_mb_code;
548 int slice_height; ///< in macroblocks
549 int first_slice_line; ///< used in mpeg4 too to handle resync markers
550 int flipflop_rounding;
551 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
553 int esc3_level_length;
555 /** [mb_intra][isChroma][level][run][last] */
556 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
557 int inter_intra_pred;
560 /* decompression specific */
564 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
565 int last_mv_dir; ///< last mv_dir, used for b frame encoding
566 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
568 /* MPEG-2-specific - I wished not to have to support this mess. */
569 int progressive_sequence;
570 int mpeg_f_code[2][2];
572 // picture structure defines are loaded from mpegutils.h
573 int picture_structure;
575 int intra_dc_precision;
576 int frame_pred_frame_dct;
578 int concealment_motion_vectors;
580 int intra_vlc_format;
582 int repeat_first_field;
588 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
591 int progressive_frame;
594 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
595 int drop_frame_timecode; ///< timecode is in drop frame format.
596 int scan_offset; ///< reserve space for SVCD scan offset user data.
601 uint8_t *ptr_lastgob;
602 int16_t (*pblocks[12])[64];
604 int16_t (*block)[64]; ///< points to one of the following blocks
605 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
606 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
608 #define SLICE_ERROR -1
609 #define SLICE_END -2 ///<end marker found
610 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
612 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
613 int16_t *block/*align 16*/, int n, int qscale);
614 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
615 int16_t *block/*align 16*/, int n, int qscale);
616 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
617 int16_t *block/*align 16*/, int n, int qscale);
618 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
619 int16_t *block/*align 16*/, int n, int qscale);
620 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
621 int16_t *block/*align 16*/, int n, int qscale);
622 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
623 int16_t *block/*align 16*/, int n, int qscale);
624 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
625 int16_t *block/*align 16*/, int n, int qscale);
626 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
627 int16_t *block/*align 16*/, int n, int qscale);
628 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
629 int16_t *block/*align 16*/, int n, int qscale);
630 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
631 int16_t *block/*align 16*/, int n, int qscale);
632 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
633 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
634 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
636 int mpv_flags; ///< flags set by private options
637 int quantizer_noise_shaping;
639 /* temp buffers for rate control */
640 float *cplx_tab, *bits_tab;
642 /* flag to indicate a reinitialization is required, e.g. after
643 * a frame size change */
650 /* temporary frames used by b_frame_strategy = 2 */
651 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
654 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
655 ((pic && pic >= old_ctx->picture && \
656 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
657 &new_ctx->picture[pic - old_ctx->picture] : NULL)
659 /* mpegvideo_enc common options */
660 #define FF_MPV_FLAG_SKIP_RD 0x0001
661 #define FF_MPV_FLAG_STRICT_GOP 0x0002
662 #define FF_MPV_FLAG_QP_RD 0x0004
663 #define FF_MPV_FLAG_CBP_RD 0x0008
664 #define FF_MPV_FLAG_NAQ 0x0010
665 #define FF_MPV_FLAG_MV0 0x0020
667 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
668 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
669 #define FF_MPV_COMMON_OPTS \
670 { "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" },\
671 { "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" },\
672 { "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" },\
673 { "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" },\
674 { "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" },\
675 { "naq", "normalize adaptive quantization", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
676 { "mv0", "always try a mb with mv=<0,0>", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_MV0 }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
677 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
678 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
679 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
680 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
681 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
682 { "error_rate", "Simulate errors in the bitstream to test error concealment.", \
683 FF_MPV_OFFSET(error_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
685 extern const AVOption ff_mpv_generic_options[];
687 #define FF_MPV_GENERIC_CLASS(name) \
688 static const AVClass name ## _class = {\
689 .class_name = #name " encoder",\
690 .item_name = av_default_item_name,\
691 .option = ff_mpv_generic_options,\
692 .version = LIBAVUTIL_VERSION_INT,\
696 * Set the given MpegEncContext to common defaults (same for encoding
697 * and decoding). The changed fields will not depend upon the prior
698 * state of the MpegEncContext.
700 void ff_MPV_common_defaults(MpegEncContext *s);
702 void ff_MPV_decode_defaults(MpegEncContext *s);
703 int ff_MPV_common_init(MpegEncContext *s);
704 int ff_MPV_common_frame_size_change(MpegEncContext *s);
705 void ff_MPV_common_end(MpegEncContext *s);
706 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
707 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
708 void ff_MPV_frame_end(MpegEncContext *s);
709 int ff_MPV_encode_init(AVCodecContext *avctx);
710 int ff_MPV_encode_end(AVCodecContext *avctx);
711 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
712 const AVFrame *frame, int *got_packet);
713 void ff_MPV_encode_init_x86(MpegEncContext *s);
714 void ff_MPV_common_init_x86(MpegEncContext *s);
715 void ff_MPV_common_init_arm(MpegEncContext *s);
716 void ff_MPV_common_init_ppc(MpegEncContext *s);
717 void ff_clean_intra_table_entries(MpegEncContext *s);
718 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
719 void ff_mpeg_flush(AVCodecContext *avctx);
720 void ff_print_debug_info(MpegEncContext *s, Picture *p);
721 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
722 int ff_find_unused_picture(MpegEncContext *s, int shared);
723 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
724 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
725 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
726 void ff_MPV_report_decode_progress(MpegEncContext *s);
727 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
728 void ff_set_qscale(MpegEncContext * s, int qscale);
730 int ff_dct_common_init(MpegEncContext *s);
731 void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],
732 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
733 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
735 void ff_init_block_index(MpegEncContext *s);
737 void ff_MPV_motion(MpegEncContext *s,
738 uint8_t *dest_y, uint8_t *dest_cb,
739 uint8_t *dest_cr, int dir,
740 uint8_t **ref_picture,
741 op_pixels_func (*pix_op)[4],
742 qpel_mc_func (*qpix_op)[16]);
745 * Allocate a Picture.
746 * The pixels are allocated/set by calling get_buffer() if shared = 0.
748 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
751 * permute block according to permuatation.
752 * @param last last non zero element in scantable order
754 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
756 static inline void ff_update_block_index(MpegEncContext *s){
757 const int block_size = 8;
759 s->block_index[0]+=2;
760 s->block_index[1]+=2;
761 s->block_index[2]+=2;
762 s->block_index[3]+=2;
765 s->dest[0]+= 2*block_size;
766 s->dest[1]+= block_size;
767 s->dest[2]+= block_size;
770 static inline int get_bits_diff(MpegEncContext *s){
771 const int bits= put_bits_count(&s->pb);
772 const int last= s->last_bits;
779 static inline int ff_h263_round_chroma(int x){
780 static const uint8_t h263_chroma_roundtab[16] = {
781 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
782 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
784 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
788 void ff_estimate_p_frame_motion(MpegEncContext * s,
790 void ff_estimate_b_frame_motion(MpegEncContext * s,
792 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
793 void ff_fix_long_p_mvs(MpegEncContext * s);
794 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
795 int16_t (*mv_table)[2], int f_code, int type, int truncate);
796 int ff_init_me(MpegEncContext *s);
797 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
798 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
799 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
800 int ref_mv_scale, int size, int h);
801 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
802 int ref_index, int size, int h, int add_rate);
805 extern const uint8_t ff_mpeg1_dc_scale_table[128];
806 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
808 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
809 void ff_mpeg1_encode_mb(MpegEncContext *s,
810 int16_t block[6][64],
811 int motion_x, int motion_y);
812 void ff_mpeg1_encode_init(MpegEncContext *s);
813 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
815 extern const uint8_t ff_aic_dc_scale_table[32];
816 extern const uint8_t ff_h263_chroma_qscale_table[32];
819 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
820 int ff_rv_decode_dc(MpegEncContext *s, int n);
821 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
825 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
826 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
827 void ff_msmpeg4_encode_mb(MpegEncContext * s,
828 int16_t block[6][64],
829 int motion_x, int motion_y);
830 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
831 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
832 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
833 void ff_msmpeg4_encode_init(MpegEncContext *s);
834 int ff_wmv2_decode_picture_header(MpegEncContext * s);
835 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
836 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
837 void ff_mspel_motion(MpegEncContext *s,
838 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
839 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
840 int motion_x, int motion_y, int h);
841 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
842 void ff_wmv2_encode_mb(MpegEncContext * s,
843 int16_t block[6][64],
844 int motion_x, int motion_y);
846 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
847 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
848 void ff_free_picture_tables(Picture *pic);
850 #endif /* AVCODEC_MPEGVIDEO_H */