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"
46 #include "libavutil/opt.h"
48 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
57 #define MPEG_BUF_SIZE (16 * 1024)
59 #define QMAT_SHIFT_MMX 16
65 #define MAX_THREADS 16
67 #define MAX_PICTURE_COUNT 32
69 #define MAX_B_FRAMES 16
71 #define ME_MAP_SIZE 64
72 #define ME_MAP_SHIFT 3
73 #define ME_MAP_MV_BITS 11
75 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
77 #define INPLACE_OFFSET 16
80 #define SEQ_END_CODE 0x000001b7
81 #define SEQ_START_CODE 0x000001b3
82 #define GOP_START_CODE 0x000001b8
83 #define PICTURE_START_CODE 0x00000100
84 #define SLICE_MIN_START_CODE 0x00000101
85 #define SLICE_MAX_START_CODE 0x000001af
86 #define EXT_START_CODE 0x000001b5
87 #define USER_START_CODE 0x000001b2
90 extern const uint8_t ff_alternate_horizontal_scan[64];
91 extern const uint8_t ff_alternate_vertical_scan[64];
93 struct MpegEncContext;
98 typedef struct Picture{
102 AVBufferRef *qscale_table_buf;
103 int8_t *qscale_table;
105 AVBufferRef *motion_val_buf[2];
106 int16_t (*motion_val[2])[2];
108 AVBufferRef *mb_type_buf;
109 uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
111 AVBufferRef *mbskip_table_buf;
112 uint8_t *mbskip_table;
114 AVBufferRef *ref_index_buf[2];
115 int8_t *ref_index[2];
117 AVBufferRef *mb_var_buf;
118 uint16_t *mb_var; ///< Table for MB variances
120 AVBufferRef *mc_mb_var_buf;
121 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
123 AVBufferRef *mb_mean_buf;
124 uint8_t *mb_mean; ///< Table for MB luminance
126 AVBufferRef *hwaccel_priv_buf;
128 * hardware accelerator private data
130 void *hwaccel_picture_private;
132 int field_picture; ///< whether or not the picture was encoded in separate fields
134 int mb_var_sum; ///< sum of MB variance for current frame
135 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
137 int b_frame_score; /* */
138 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
145 * Motion estimation context.
147 typedef struct MotionEstContext{
148 AVCodecContext *avctx;
149 int skip; ///< set if ME is skipped for the current MB
150 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
151 int direct_basis_mv[4][2];
152 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
157 uint32_t *map; ///< map to avoid duplicate evaluations
158 uint32_t *score_map; ///< map to store the scores
159 unsigned map_generation;
160 int pre_penalty_factor;
161 int penalty_factor; /**< an estimate of the bits required to
162 code a given mv value, e.g. (1,0) takes
163 more bits than (0,0). We have to
164 estimate whether any reduction in
165 residual is worth the extra bits. */
166 int sub_penalty_factor;
167 int mb_penalty_factor;
171 int pre_pass; ///< = 1 for the pre pass
183 /* temp variables for picture complexity calculation */
184 int mc_mb_var_sum_temp;
186 int scene_change_score;
187 /* cmp, chroma_cmp;*/
188 op_pixels_func (*hpel_put)[4];
189 op_pixels_func (*hpel_avg)[4];
190 qpel_mc_func (*qpel_put)[16];
191 qpel_mc_func (*qpel_avg)[16];
192 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
193 uint8_t *current_mv_penalty;
194 int (*sub_motion_search)(struct MpegEncContext * s,
195 int *mx_ptr, int *my_ptr, int dmin,
196 int src_index, int ref_index,
203 typedef struct MpegEncContext {
206 int y_dc_scale, c_dc_scale;
208 int block_last_index[12]; ///< last non zero coefficient in block
209 int h263_aic; ///< Advanded INTRA Coding (AIC)
212 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
213 ScanTable intra_scantable;
214 ScanTable intra_h_scantable;
215 ScanTable intra_v_scantable;
217 /* WARNING: changes above this line require updates to hardcoded
218 * offsets used in asm. */
220 struct AVCodecContext *avctx;
221 /* the following parameters must be initialized before encoding */
222 int width, height;///< picture size. must be a multiple of 16
224 int intra_only; ///< if true, only intra pictures are generated
225 int bit_rate; ///< wanted bit rate
226 enum OutputFormat out_format; ///< output format
227 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
228 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
230 /* the following codec id fields are deprecated in favor of codec_id */
231 int h263_plus; ///< h263 plus headers
232 int h263_flv; ///< use flv h263 header
234 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
235 int fixed_qscale; ///< fixed qscale if non zero
236 int encoding; ///< true if we are encoding (vs decoding)
237 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
238 int flags2; ///< AVCodecContext.flags2
239 int max_b_frames; ///< max number of b-frames for encoding
240 int luma_elim_threshold;
241 int chroma_elim_threshold;
242 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
243 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
244 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
245 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
246 /* the following fields are managed internally by the encoder */
248 /* sequence parameters */
249 int context_initialized;
250 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
251 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
252 int picture_number; //FIXME remove, unclear definition
253 int picture_in_gop_number; ///< 0-> first pic in gop, ...
254 int mb_width, mb_height; ///< number of MBs horizontally & vertically
255 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
256 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
257 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
258 int mb_num; ///< number of MBs of a picture
259 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
260 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
261 Picture *picture; ///< main picture buffer
262 Picture **input_picture; ///< next pictures on display order for encoding
263 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
265 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
267 * pts difference between the first and second input frame, used for
268 * calculating dts of the first frame when there's a delay */
271 * reordered pts to be used as dts for the next output frame when there's
273 int64_t reordered_pts;
278 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
279 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
280 struct MpegEncContext *thread_context[MAX_THREADS];
281 int slice_context_count; ///< number of used thread_contexts
284 * copy of the previous picture structure.
285 * note, linesize & data, might not match the previous picture (for field pictures)
287 Picture last_picture;
290 * copy of the next picture structure.
291 * note, linesize & data, might not match the next picture (for field pictures)
293 Picture next_picture;
296 * copy of the source picture structure for encoding.
297 * note, linesize & data, might not match the source picture (for field pictures)
302 * copy of the current picture structure.
303 * note, linesize & data, might not match the current picture (for field pictures)
305 Picture current_picture; ///< buffer to store the decompressed current picture
307 Picture *last_picture_ptr; ///< pointer to the previous picture.
308 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
309 Picture *current_picture_ptr; ///< pointer to the current picture
310 int last_dc[3]; ///< last DC values for MPEG1
311 int16_t *dc_val_base;
312 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
313 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
314 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
315 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
316 uint8_t *coded_block_base;
317 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
318 int16_t (*ac_val_base)[16];
319 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
320 int mb_skipped; ///< MUST BE SET only during DECODING
321 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
322 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
323 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
324 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
325 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
326 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
327 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
328 uint8_t *obmc_scratchpad;
329 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
332 int chroma_qscale; ///< chroma QP
333 unsigned int lambda; ///< lagrange multipler used in rate distortion
334 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
336 int adaptive_quant; ///< use adaptive quantization
337 int dquant; ///< qscale difference to prev qscale
338 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
339 int last_pict_type; //FIXME removes
340 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
342 int frame_rate_index;
343 int last_lambda_for[5]; ///< last lambda for a specific pict type
344 int skipdct; ///< skip dct and code zero residual
346 /* motion compensation */
347 int unrestricted_mv; ///< mv can point outside of the coded picture
348 int h263_long_vectors; ///< use horrible h263v1 long vector mode
350 DSPContext dsp; ///< pointers for accelerated dsp functions
353 VideoDSPContext vdsp;
354 H263DSPContext h263dsp;
355 int f_code; ///< forward MV resolution
356 int b_code; ///< backward MV resolution for B Frames (mpeg4)
357 int16_t (*p_mv_table_base)[2];
358 int16_t (*b_forw_mv_table_base)[2];
359 int16_t (*b_back_mv_table_base)[2];
360 int16_t (*b_bidir_forw_mv_table_base)[2];
361 int16_t (*b_bidir_back_mv_table_base)[2];
362 int16_t (*b_direct_mv_table_base)[2];
363 int16_t (*p_field_mv_table_base[2][2])[2];
364 int16_t (*b_field_mv_table_base[2][2][2])[2];
365 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
366 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
367 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
368 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
369 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
370 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
371 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
372 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
373 uint8_t (*p_field_select_table[2]);
374 uint8_t (*b_field_select_table[2][2]);
375 int me_method; ///< ME algorithm
377 #define MV_DIR_FORWARD 1
378 #define MV_DIR_BACKWARD 2
379 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
381 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
382 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
383 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
384 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
385 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
386 /**motion vectors for a macroblock
387 first coordinate : 0 = forward 1 = backward
388 second " : depend on type
389 third " : 0 = x, 1 = y
392 int field_select[2][2];
393 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
394 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
395 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
399 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
400 for b-frames rounding mode is always 0 */
402 /* macroblock layer */
406 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h)
408 int block_index[6]; ///< index to current MB in block based arrays with edges
412 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
414 /** matrix transmitted in the bitstream */
415 uint16_t intra_matrix[64];
416 uint16_t chroma_intra_matrix[64];
417 uint16_t inter_matrix[64];
418 uint16_t chroma_inter_matrix[64];
419 #define QUANT_BIAS_SHIFT 8
420 int intra_quant_bias; ///< bias for the quantizer
421 int inter_quant_bias; ///< bias for the quantizer
422 int min_qcoeff; ///< minimum encodable coefficient
423 int max_qcoeff; ///< maximum encodable coefficient
424 int ac_esc_length; ///< num of bits needed to encode the longest esc
425 uint8_t *intra_ac_vlc_length;
426 uint8_t *intra_ac_vlc_last_length;
427 uint8_t *inter_ac_vlc_length;
428 uint8_t *inter_ac_vlc_last_length;
429 uint8_t *luma_dc_vlc_length;
430 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
434 /** precomputed matrix (combine qscale and DCT renorm) */
435 int (*q_intra_matrix)[64];
436 int (*q_inter_matrix)[64];
437 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
438 uint16_t (*q_intra_matrix16)[2][64];
439 uint16_t (*q_inter_matrix16)[2][64];
441 /* noise reduction */
442 int (*dct_error_sum)[64];
444 uint16_t (*dct_offset)[64];
446 void *opaque; ///< private data for the user
448 /* bit rate control */
450 int frame_bits; ///< bits used for the current frame
451 int next_lambda; ///< next lambda used for retrying to encode a frame
452 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
454 /* statistics, used for 2-pass encoding */
463 int misc_bits; ///< cbp, mb_type
464 int last_bits; ///< temp var used for calculating the above vars
466 /* error concealment / resync */
467 int resync_mb_x; ///< x position of last resync marker
468 int resync_mb_y; ///< y position of last resync marker
469 GetBitContext last_resync_gb; ///< used to search for the next resync marker
470 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
471 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
474 ParseContext parse_context;
478 int obmc; ///< overlapped block motion compensation
479 int mb_info; ///< interval for outputting info about mb offsets as side data
480 int prev_mb_info, last_mb_info;
481 uint8_t *mb_info_ptr;
484 /* H.263+ specific */
485 int umvplus; ///< == H263+ && unrestricted_mv
486 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
487 int h263_slice_structured;
488 int alt_inter_vlc; ///< alternative inter vlc
494 ///< number of bits to represent the fractional part of time (encoder only)
495 int time_increment_bits;
497 int time_base; ///< time in seconds of last I,P,S Frame
498 int64_t time; ///< time of current frame
499 int64_t last_non_b_time;
500 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
501 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
502 uint16_t pp_field_time;
503 uint16_t pb_field_time; ///< like above, just for interlaced
504 int real_sprite_warping_points;
505 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
506 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
509 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
510 int aspect_ratio_info; //FIXME remove
511 int sprite_warping_accuracy;
512 int data_partitioning; ///< data partitioning flag from header
513 int partitioned_frame; ///< is current frame partitioned
514 int low_delay; ///< no reordering needed / has no b-frames
516 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
517 PutBitContext tex_pb; ///< used for data partitioned VOPs
518 PutBitContext pb2; ///< used for data partitioned VOPs
520 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
522 /* divx specific, used to workaround (many) bugs in divx5 */
524 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
525 int bitstream_buffer_size;
526 unsigned int allocated_bitstream_buffer_size;
529 int rv10_version; ///< RV10 version: 0 or 3
530 int rv10_first_dc_coded[3];
531 int orig_width, orig_height;
534 struct MJpegContext *mjpeg_ctx;
536 /* MSMPEG4 specific */
539 int rl_chroma_table_index;
541 int use_skip_mb_code;
542 int slice_height; ///< in macroblocks
543 int first_slice_line; ///< used in mpeg4 too to handle resync markers
544 int flipflop_rounding;
545 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
547 int esc3_level_length;
549 /** [mb_intra][isChroma][level][run][last] */
550 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
551 int inter_intra_pred;
554 /* decompression specific */
558 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
559 int last_mv_dir; ///< last mv_dir, used for b frame encoding
560 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
562 /* MPEG-2-specific - I wished not to have to support this mess. */
563 int progressive_sequence;
564 int mpeg_f_code[2][2];
566 // picture structure defines are loaded from mpegutils.h
567 int picture_structure;
569 int intra_dc_precision;
570 int frame_pred_frame_dct;
572 int concealment_motion_vectors;
574 int intra_vlc_format;
576 int repeat_first_field;
582 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
585 int progressive_frame;
588 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
589 int drop_frame_timecode; ///< timecode is in drop frame format.
590 int scan_offset; ///< reserve space for SVCD scan offset user data.
595 uint8_t *ptr_lastgob;
596 int16_t (*pblocks[12])[64];
598 int16_t (*block)[64]; ///< points to one of the following blocks
599 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
600 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
602 #define SLICE_ERROR -1
603 #define SLICE_END -2 ///<end marker found
604 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
606 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
607 int16_t *block/*align 16*/, int n, int qscale);
608 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
609 int16_t *block/*align 16*/, int n, int qscale);
610 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
611 int16_t *block/*align 16*/, int n, int qscale);
612 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
613 int16_t *block/*align 16*/, int n, int qscale);
614 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
615 int16_t *block/*align 16*/, int n, int qscale);
616 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
617 int16_t *block/*align 16*/, int n, int qscale);
618 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
619 int16_t *block/*align 16*/, int n, int qscale);
620 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
621 int16_t *block/*align 16*/, int n, int qscale);
622 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
623 int16_t *block/*align 16*/, int n, int qscale);
624 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
625 int16_t *block/*align 16*/, int n, int qscale);
626 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
627 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
628 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
630 int mpv_flags; ///< flags set by private options
631 int quantizer_noise_shaping;
633 /* temp buffers for rate control */
634 float *cplx_tab, *bits_tab;
636 /* flag to indicate a reinitialization is required, e.g. after
637 * a frame size change */
644 /* temporary frames used by b_frame_strategy = 2 */
645 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
648 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
649 ((pic && pic >= old_ctx->picture && \
650 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
651 &new_ctx->picture[pic - old_ctx->picture] : NULL)
653 /* mpegvideo_enc common options */
654 #define FF_MPV_FLAG_SKIP_RD 0x0001
655 #define FF_MPV_FLAG_STRICT_GOP 0x0002
656 #define FF_MPV_FLAG_QP_RD 0x0004
657 #define FF_MPV_FLAG_CBP_RD 0x0008
658 #define FF_MPV_FLAG_NAQ 0x0010
659 #define FF_MPV_FLAG_MV0 0x0020
661 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
662 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
663 #define FF_MPV_COMMON_OPTS \
664 { "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" },\
665 { "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" },\
666 { "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" },\
667 { "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" },\
668 { "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" },\
669 { "naq", "normalize adaptive quantization", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
670 { "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" },\
671 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
672 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
673 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
674 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
675 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
676 { "error_rate", "Simulate errors in the bitstream to test error concealment.", \
677 FF_MPV_OFFSET(error_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
679 extern const AVOption ff_mpv_generic_options[];
681 #define FF_MPV_GENERIC_CLASS(name) \
682 static const AVClass name ## _class = {\
683 .class_name = #name " encoder",\
684 .item_name = av_default_item_name,\
685 .option = ff_mpv_generic_options,\
686 .version = LIBAVUTIL_VERSION_INT,\
690 * Set the given MpegEncContext to common defaults (same for encoding
691 * and decoding). The changed fields will not depend upon the prior
692 * state of the MpegEncContext.
694 void ff_MPV_common_defaults(MpegEncContext *s);
696 void ff_MPV_decode_defaults(MpegEncContext *s);
697 int ff_MPV_common_init(MpegEncContext *s);
698 int ff_MPV_common_frame_size_change(MpegEncContext *s);
699 void ff_MPV_common_end(MpegEncContext *s);
700 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
701 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
702 void ff_MPV_frame_end(MpegEncContext *s);
703 int ff_MPV_encode_init(AVCodecContext *avctx);
704 int ff_MPV_encode_end(AVCodecContext *avctx);
705 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
706 const AVFrame *frame, int *got_packet);
707 void ff_MPV_encode_init_x86(MpegEncContext *s);
708 void ff_MPV_common_init_x86(MpegEncContext *s);
709 void ff_MPV_common_init_arm(MpegEncContext *s);
710 void ff_MPV_common_init_ppc(MpegEncContext *s);
711 void ff_clean_intra_table_entries(MpegEncContext *s);
712 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
713 void ff_mpeg_flush(AVCodecContext *avctx);
714 void ff_print_debug_info(MpegEncContext *s, Picture *p);
715 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
716 int ff_find_unused_picture(MpegEncContext *s, int shared);
717 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
718 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
719 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
720 void ff_MPV_report_decode_progress(MpegEncContext *s);
721 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
722 void ff_set_qscale(MpegEncContext * s, int qscale);
724 /* Error resilience */
725 void ff_mpeg_er_frame_start(MpegEncContext *s);
726 void ff_mpeg_set_erpic(ERPicture *dst, Picture *src);
728 int ff_dct_common_init(MpegEncContext *s);
729 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
730 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
731 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
733 void ff_init_block_index(MpegEncContext *s);
735 void ff_MPV_motion(MpegEncContext *s,
736 uint8_t *dest_y, uint8_t *dest_cb,
737 uint8_t *dest_cr, int dir,
738 uint8_t **ref_picture,
739 op_pixels_func (*pix_op)[4],
740 qpel_mc_func (*qpix_op)[16]);
743 * Allocate a Picture.
744 * The pixels are allocated/set by calling get_buffer() if shared = 0.
746 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
749 * permute block according to permuatation.
750 * @param last last non zero element in scantable order
752 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
754 static inline void ff_update_block_index(MpegEncContext *s){
755 const int block_size = 8;
757 s->block_index[0]+=2;
758 s->block_index[1]+=2;
759 s->block_index[2]+=2;
760 s->block_index[3]+=2;
763 s->dest[0]+= 2*block_size;
764 s->dest[1]+= block_size;
765 s->dest[2]+= block_size;
768 static inline int get_bits_diff(MpegEncContext *s){
769 const int bits= put_bits_count(&s->pb);
770 const int last= s->last_bits;
777 static inline int ff_h263_round_chroma(int x){
778 static const uint8_t h263_chroma_roundtab[16] = {
779 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
780 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
782 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
786 void ff_estimate_p_frame_motion(MpegEncContext * s,
788 void ff_estimate_b_frame_motion(MpegEncContext * s,
790 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
791 void ff_fix_long_p_mvs(MpegEncContext * s);
792 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
793 int16_t (*mv_table)[2], int f_code, int type, int truncate);
794 int ff_init_me(MpegEncContext *s);
795 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
796 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
797 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
798 int ref_mv_scale, int size, int h);
799 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
800 int ref_index, int size, int h, int add_rate);
803 extern const uint8_t ff_mpeg1_dc_scale_table[128];
804 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
806 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
807 void ff_mpeg1_encode_mb(MpegEncContext *s,
808 int16_t block[6][64],
809 int motion_x, int motion_y);
810 void ff_mpeg1_encode_init(MpegEncContext *s);
811 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
813 extern const uint8_t ff_aic_dc_scale_table[32];
814 extern const uint8_t ff_h263_chroma_qscale_table[32];
817 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
818 int ff_rv_decode_dc(MpegEncContext *s, int n);
819 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
823 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
824 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
825 void ff_msmpeg4_encode_mb(MpegEncContext * s,
826 int16_t block[6][64],
827 int motion_x, int motion_y);
828 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
829 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
830 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
831 void ff_msmpeg4_encode_init(MpegEncContext *s);
832 int ff_wmv2_decode_picture_header(MpegEncContext * s);
833 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
834 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
835 void ff_mspel_motion(MpegEncContext *s,
836 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
837 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
838 int motion_x, int motion_y, int h);
839 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
840 void ff_wmv2_encode_mb(MpegEncContext * s,
841 int16_t block[6][64],
842 int motion_x, int motion_y);
844 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
845 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
846 void ff_free_picture_tables(Picture *pic);
848 #endif /* AVCODEC_MPEGVIDEO_H */