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 FFmpeg.
8 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
37 #include "h264chroma.h"
41 #include "mpegvideodsp.h"
42 #include "mpegvideoencdsp.h"
43 #include "pixblockdsp.h"
45 #include "ratecontrol.h"
47 #include "mpeg12data.h"
53 #include "libavutil/opt.h"
54 #include "libavutil/timecode.h"
56 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
65 #define MPEG_BUF_SIZE (16 * 1024)
67 #define QMAT_SHIFT_MMX 16
73 #define MAX_THREADS 32
74 #define MAX_PICTURE_COUNT 36
76 #define MAX_B_FRAMES 16
78 #define ME_MAP_SIZE 64
79 #define ME_MAP_SHIFT 3
80 #define ME_MAP_MV_BITS 11
82 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
84 #define INPLACE_OFFSET 16
89 #define SEQ_END_CODE 0x000001b7
90 #define SEQ_START_CODE 0x000001b3
91 #define GOP_START_CODE 0x000001b8
92 #define PICTURE_START_CODE 0x00000100
93 #define SLICE_MIN_START_CODE 0x00000101
94 #define SLICE_MAX_START_CODE 0x000001af
95 #define EXT_START_CODE 0x000001b5
96 #define USER_START_CODE 0x000001b2
99 extern const uint8_t ff_alternate_horizontal_scan[64];
100 extern const uint8_t ff_alternate_vertical_scan[64];
102 struct MpegEncContext;
107 typedef struct Picture{
111 AVBufferRef *qscale_table_buf;
112 int8_t *qscale_table;
114 AVBufferRef *motion_val_buf[2];
115 int16_t (*motion_val[2])[2];
117 AVBufferRef *mb_type_buf;
118 uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
120 AVBufferRef *mbskip_table_buf;
121 uint8_t *mbskip_table;
123 AVBufferRef *ref_index_buf[2];
124 int8_t *ref_index[2];
126 AVBufferRef *mb_var_buf;
127 uint16_t *mb_var; ///< Table for MB variances
129 AVBufferRef *mc_mb_var_buf;
130 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
132 int alloc_mb_width; ///< mb_width used to allocate tables
133 int alloc_mb_height; ///< mb_height used to allocate tables
135 AVBufferRef *mb_mean_buf;
136 uint8_t *mb_mean; ///< Table for MB luminance
138 AVBufferRef *hwaccel_priv_buf;
140 * hardware accelerator private data
142 void *hwaccel_picture_private;
144 int field_picture; ///< whether or not the picture was encoded in separate fields
146 int64_t mb_var_sum; ///< sum of MB variance for current frame
147 int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
150 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
155 uint64_t error[AV_NUM_DATA_POINTERS];
159 * Motion estimation context.
161 typedef struct MotionEstContext{
162 AVCodecContext *avctx;
163 int skip; ///< set if ME is skipped for the current MB
164 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
165 int direct_basis_mv[4][2];
166 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
171 uint32_t *map; ///< map to avoid duplicate evaluations
172 uint32_t *score_map; ///< map to store the scores
173 unsigned map_generation;
174 int pre_penalty_factor;
175 int penalty_factor; /**< an estimate of the bits required to
176 code a given mv value, e.g. (1,0) takes
177 more bits than (0,0). We have to
178 estimate whether any reduction in
179 residual is worth the extra bits. */
180 int sub_penalty_factor;
181 int mb_penalty_factor;
185 int pre_pass; ///< = 1 for the pre pass
197 /* temp variables for picture complexity calculation */
198 int64_t mc_mb_var_sum_temp;
199 int64_t mb_var_sum_temp;
200 int scene_change_score;
201 /* cmp, chroma_cmp;*/
202 op_pixels_func (*hpel_put)[4];
203 op_pixels_func (*hpel_avg)[4];
204 qpel_mc_func (*qpel_put)[16];
205 qpel_mc_func (*qpel_avg)[16];
206 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
207 uint8_t *current_mv_penalty;
208 int (*sub_motion_search)(struct MpegEncContext * s,
209 int *mx_ptr, int *my_ptr, int dmin,
210 int src_index, int ref_index,
217 typedef struct MpegEncContext {
220 int y_dc_scale, c_dc_scale;
222 int block_last_index[12]; ///< last non zero coefficient in block
223 int h263_aic; ///< Advanded INTRA Coding (AIC)
226 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
227 ScanTable intra_scantable;
228 ScanTable intra_h_scantable;
229 ScanTable intra_v_scantable;
231 /* WARNING: changes above this line require updates to hardcoded
232 * offsets used in asm. */
234 struct AVCodecContext *avctx;
235 /* the following parameters must be initialized before encoding */
236 int width, height;///< picture size. must be a multiple of 16
238 int intra_only; ///< if true, only intra pictures are generated
239 int bit_rate; ///< wanted bit rate
240 enum OutputFormat out_format; ///< output format
241 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
242 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
244 /* the following codec id fields are deprecated in favor of codec_id */
245 int h263_plus; ///< h263 plus headers
246 int h263_flv; ///< use flv h263 header
248 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
249 int fixed_qscale; ///< fixed qscale if non zero
250 int encoding; ///< true if we are encoding (vs decoding)
251 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
252 int flags2; ///< AVCodecContext.flags2
253 int max_b_frames; ///< max number of b-frames for encoding
254 int luma_elim_threshold;
255 int chroma_elim_threshold;
256 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
257 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
258 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
259 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
260 /* the following fields are managed internally by the encoder */
262 /* sequence parameters */
263 int context_initialized;
264 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
265 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
266 int picture_number; //FIXME remove, unclear definition
267 int picture_in_gop_number; ///< 0-> first pic in gop, ...
268 int mb_width, mb_height; ///< number of MBs horizontally & vertically
269 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
270 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
271 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
272 int mb_num; ///< number of MBs of a picture
273 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
274 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
275 Picture *picture; ///< main picture buffer
276 Picture **input_picture; ///< next pictures on display order for encoding
277 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
279 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
281 * pts difference between the first and second input frame, used for
282 * calculating dts of the first frame when there's a delay */
285 * reordered pts to be used as dts for the next output frame when there's
287 int64_t reordered_pts;
292 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
293 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
294 struct MpegEncContext *thread_context[MAX_THREADS];
295 int slice_context_count; ///< number of used thread_contexts
298 * copy of the previous picture structure.
299 * note, linesize & data, might not match the previous picture (for field pictures)
301 Picture last_picture;
304 * copy of the next picture structure.
305 * note, linesize & data, might not match the next picture (for field pictures)
307 Picture next_picture;
310 * copy of the source picture structure for encoding.
311 * note, linesize & data, might not match the source picture (for field pictures)
316 * copy of the current picture structure.
317 * note, linesize & data, might not match the current picture (for field pictures)
319 Picture current_picture; ///< buffer to store the decompressed current picture
321 Picture *last_picture_ptr; ///< pointer to the previous picture.
322 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
323 Picture *current_picture_ptr; ///< pointer to the current picture
324 int last_dc[3]; ///< last DC values for MPEG1
325 int16_t *dc_val_base;
326 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
327 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
328 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
329 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
330 uint8_t *coded_block_base;
331 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
332 int16_t (*ac_val_base)[16];
333 int16_t (*ac_val[3])[16]; ///< used for mpeg4 AC prediction, all 3 arrays must be continuous
334 int mb_skipped; ///< MUST BE SET only during DECODING
335 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
336 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
337 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
338 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
339 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
340 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
341 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
342 uint8_t *obmc_scratchpad;
343 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
346 int chroma_qscale; ///< chroma QP
347 unsigned int lambda; ///< lagrange multipler used in rate distortion
348 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
350 int adaptive_quant; ///< use adaptive quantization
351 int dquant; ///< qscale difference to prev qscale
352 int closed_gop; ///< MPEG1/2 GOP is closed
353 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
355 int last_pict_type; //FIXME removes
356 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
358 int frame_rate_index;
359 AVRational mpeg2_frame_rate_ext;
360 int last_lambda_for[5]; ///< last lambda for a specific pict type
361 int skipdct; ///< skip dct and code zero residual
363 /* motion compensation */
364 int unrestricted_mv; ///< mv can point outside of the coded picture
365 int h263_long_vectors; ///< use horrible h263v1 long vector mode
367 BlockDSPContext bdsp;
368 DSPContext dsp; ///< pointers for accelerated dsp functions
370 H264ChromaContext h264chroma;
373 MpegVideoDSPContext mdsp;
374 MpegvideoEncDSPContext mpvencdsp;
375 PixblockDSPContext pdsp;
377 VideoDSPContext vdsp;
378 H263DSPContext h263dsp;
379 int f_code; ///< forward MV resolution
380 int b_code; ///< backward MV resolution for B Frames (mpeg4)
381 int16_t (*p_mv_table_base)[2];
382 int16_t (*b_forw_mv_table_base)[2];
383 int16_t (*b_back_mv_table_base)[2];
384 int16_t (*b_bidir_forw_mv_table_base)[2];
385 int16_t (*b_bidir_back_mv_table_base)[2];
386 int16_t (*b_direct_mv_table_base)[2];
387 int16_t (*p_field_mv_table_base[2][2])[2];
388 int16_t (*b_field_mv_table_base[2][2][2])[2];
389 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
390 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
391 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
392 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
393 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
394 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
395 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
396 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
397 uint8_t (*p_field_select_table[2]);
398 uint8_t (*b_field_select_table[2][2]);
399 int me_method; ///< ME algorithm
401 #define MV_DIR_FORWARD 1
402 #define MV_DIR_BACKWARD 2
403 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
405 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
406 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
407 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
408 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
409 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
410 /**motion vectors for a macroblock
411 first coordinate : 0 = forward 1 = backward
412 second " : depend on type
413 third " : 0 = x, 1 = y
416 int field_select[2][2];
417 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
418 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
419 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
423 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
424 for b-frames rounding mode is always 0 */
426 /* macroblock layer */
430 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h)
432 int block_index[6]; ///< index to current MB in block based arrays with edges
436 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
438 /** matrix transmitted in the bitstream */
439 uint16_t intra_matrix[64];
440 uint16_t chroma_intra_matrix[64];
441 uint16_t inter_matrix[64];
442 uint16_t chroma_inter_matrix[64];
443 #define QUANT_BIAS_SHIFT 8
444 int intra_quant_bias; ///< bias for the quantizer
445 int inter_quant_bias; ///< bias for the quantizer
446 int min_qcoeff; ///< minimum encodable coefficient
447 int max_qcoeff; ///< maximum encodable coefficient
448 int ac_esc_length; ///< num of bits needed to encode the longest esc
449 uint8_t *intra_ac_vlc_length;
450 uint8_t *intra_ac_vlc_last_length;
451 uint8_t *inter_ac_vlc_length;
452 uint8_t *inter_ac_vlc_last_length;
453 uint8_t *luma_dc_vlc_length;
454 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
458 /** precomputed matrix (combine qscale and DCT renorm) */
459 int (*q_intra_matrix)[64];
460 int (*q_chroma_intra_matrix)[64];
461 int (*q_inter_matrix)[64];
462 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
463 uint16_t (*q_intra_matrix16)[2][64];
464 uint16_t (*q_chroma_intra_matrix16)[2][64];
465 uint16_t (*q_inter_matrix16)[2][64];
467 /* noise reduction */
468 int (*dct_error_sum)[64];
470 uint16_t (*dct_offset)[64];
472 void *opaque; ///< private data for the user
474 /* bit rate control */
476 int frame_bits; ///< bits used for the current frame
477 int stuffing_bits; ///< bits used for stuffing
478 int next_lambda; ///< next lambda used for retrying to encode a frame
479 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
481 /* statistics, used for 2-pass encoding */
490 int misc_bits; ///< cbp, mb_type
491 int last_bits; ///< temp var used for calculating the above vars
493 /* error concealment / resync */
494 int resync_mb_x; ///< x position of last resync marker
495 int resync_mb_y; ///< y position of last resync marker
496 GetBitContext last_resync_gb; ///< used to search for the next resync marker
497 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
498 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
501 ParseContext parse_context;
505 int obmc; ///< overlapped block motion compensation
506 int mb_info; ///< interval for outputting info about mb offsets as side data
507 int prev_mb_info, last_mb_info;
508 uint8_t *mb_info_ptr;
512 /* H.263+ specific */
513 int umvplus; ///< == H263+ && unrestricted_mv
514 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
515 int h263_slice_structured;
516 int alt_inter_vlc; ///< alternative inter vlc
522 ///< number of bits to represent the fractional part of time (encoder only)
523 int time_increment_bits;
525 int time_base; ///< time in seconds of last I,P,S Frame
526 int64_t time; ///< time of current frame
527 int64_t last_non_b_time;
528 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
529 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
530 uint16_t pp_field_time;
531 uint16_t pb_field_time; ///< like above, just for interlaced
532 int real_sprite_warping_points;
533 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
534 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
537 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
538 int aspect_ratio_info; //FIXME remove
539 int sprite_warping_accuracy;
540 int data_partitioning; ///< data partitioning flag from header
541 int partitioned_frame; ///< is current frame partitioned
542 int low_delay; ///< no reordering needed / has no b-frames
544 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
545 PutBitContext tex_pb; ///< used for data partitioned VOPs
546 PutBitContext pb2; ///< used for data partitioned VOPs
548 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
550 /* divx specific, used to workaround (many) bugs in divx5 */
552 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
553 int bitstream_buffer_size;
554 unsigned int allocated_bitstream_buffer_size;
557 int rv10_version; ///< RV10 version: 0 or 3
558 int rv10_first_dc_coded[3];
559 int orig_width, orig_height;
562 struct MJpegContext *mjpeg_ctx;
565 /* MSMPEG4 specific */
568 int rl_chroma_table_index;
570 int use_skip_mb_code;
571 int slice_height; ///< in macroblocks
572 int first_slice_line; ///< used in mpeg4 too to handle resync markers
573 int flipflop_rounding;
574 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
576 int esc3_level_length;
578 /** [mb_intra][isChroma][level][run][last] */
579 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
580 int inter_intra_pred;
583 /* decompression specific */
587 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
588 int last_mv_dir; ///< last mv_dir, used for b frame encoding
589 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
591 /* MPEG-2-specific - I wished not to have to support this mess. */
592 int progressive_sequence;
593 int mpeg_f_code[2][2];
595 // picture structure defines are loaded from mpegutils.h
596 int picture_structure;
598 int intra_dc_precision;
599 int frame_pred_frame_dct;
601 int concealment_motion_vectors;
603 int intra_vlc_format;
606 int repeat_first_field;
612 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
615 int progressive_frame;
618 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
619 int drop_frame_timecode; ///< timecode is in drop frame format.
620 int scan_offset; ///< reserve space for SVCD scan offset user data.
625 char *tc_opt_str; ///< timecode option string
626 AVTimecode tc; ///< timecode context
628 uint8_t *ptr_lastgob;
629 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
630 int pack_pblocks; //xvmc needs to keep blocks without gaps.
631 int16_t (*pblocks[12])[64];
633 int16_t (*block)[64]; ///< points to one of the following blocks
634 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
635 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
637 #define SLICE_ERROR -1
638 #define SLICE_END -2 ///<end marker found
639 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
641 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
642 int16_t *block/*align 16*/, int n, int qscale);
643 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
644 int16_t *block/*align 16*/, int n, int qscale);
645 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
646 int16_t *block/*align 16*/, int n, int qscale);
647 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
648 int16_t *block/*align 16*/, int n, int qscale);
649 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
650 int16_t *block/*align 16*/, int n, int qscale);
651 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
652 int16_t *block/*align 16*/, int n, int qscale);
653 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
654 int16_t *block/*align 16*/, int n, int qscale);
655 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
656 int16_t *block/*align 16*/, int n, int qscale);
657 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
658 int16_t *block/*align 16*/, int n, int qscale);
659 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
660 int16_t *block/*align 16*/, int n, int qscale);
661 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
662 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
663 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
665 int mpv_flags; ///< flags set by private options
666 int quantizer_noise_shaping;
668 /* temp buffers for rate control */
669 float *cplx_tab, *bits_tab;
671 /* flag to indicate a reinitialization is required, e.g. after
672 * a frame size change */
679 /* temporary frames used by b_frame_strategy = 2 */
680 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
683 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
684 ((pic && pic >= old_ctx->picture && \
685 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
686 &new_ctx->picture[pic - old_ctx->picture] : NULL)
688 /* mpegvideo_enc common options */
689 #define FF_MPV_FLAG_SKIP_RD 0x0001
690 #define FF_MPV_FLAG_STRICT_GOP 0x0002
691 #define FF_MPV_FLAG_QP_RD 0x0004
692 #define FF_MPV_FLAG_CBP_RD 0x0008
693 #define FF_MPV_FLAG_NAQ 0x0010
694 #define FF_MPV_FLAG_MV0 0x0020
696 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
697 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
698 #define FF_MPV_COMMON_OPTS \
699 { "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" },\
700 { "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" },\
701 { "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" },\
702 { "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" },\
703 { "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" },\
704 { "naq", "normalize adaptive quantization", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
705 { "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" },\
706 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
707 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
708 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
709 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
710 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
711 { "error_rate", "Simulate errors in the bitstream to test error concealment.", \
712 FF_MPV_OFFSET(error_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
714 extern const AVOption ff_mpv_generic_options[];
716 #define FF_MPV_GENERIC_CLASS(name) \
717 static const AVClass name ## _class = {\
718 .class_name = #name " encoder",\
719 .item_name = av_default_item_name,\
720 .option = ff_mpv_generic_options,\
721 .version = LIBAVUTIL_VERSION_INT,\
725 * Set the given MpegEncContext to common defaults (same for encoding
726 * and decoding). The changed fields will not depend upon the prior
727 * state of the MpegEncContext.
729 void ff_MPV_common_defaults(MpegEncContext *s);
731 void ff_MPV_decode_defaults(MpegEncContext *s);
732 int ff_MPV_common_init(MpegEncContext *s);
733 int ff_MPV_common_frame_size_change(MpegEncContext *s);
734 void ff_MPV_common_end(MpegEncContext *s);
735 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
736 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
737 void ff_MPV_frame_end(MpegEncContext *s);
738 int ff_MPV_encode_init(AVCodecContext *avctx);
739 int ff_MPV_encode_end(AVCodecContext *avctx);
740 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
741 const AVFrame *frame, int *got_packet);
742 void ff_dct_encode_init_x86(MpegEncContext *s);
743 void ff_MPV_common_init_x86(MpegEncContext *s);
744 void ff_MPV_common_init_axp(MpegEncContext *s);
745 void ff_MPV_common_init_arm(MpegEncContext *s);
746 void ff_MPV_common_init_ppc(MpegEncContext *s);
747 void ff_clean_intra_table_entries(MpegEncContext *s);
748 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
749 void ff_mpeg_flush(AVCodecContext *avctx);
751 void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
752 void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table,
753 uint32_t *mbtype_table, int8_t *qscale_table, int16_t (*motion_val[2])[2],
755 int mb_width, int mb_height, int mb_stride, int quarter_sample);
757 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
759 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
760 int ff_find_unused_picture(MpegEncContext *s, int shared);
761 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
762 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
763 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
764 void ff_MPV_report_decode_progress(MpegEncContext *s);
765 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
766 void ff_set_qscale(MpegEncContext * s, int qscale);
768 int ff_dct_common_init(MpegEncContext *s);
769 int ff_dct_encode_init(MpegEncContext *s);
770 void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],
771 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
772 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
774 void ff_init_block_index(MpegEncContext *s);
776 void ff_MPV_motion(MpegEncContext *s,
777 uint8_t *dest_y, uint8_t *dest_cb,
778 uint8_t *dest_cr, int dir,
779 uint8_t **ref_picture,
780 op_pixels_func (*pix_op)[4],
781 qpel_mc_func (*qpix_op)[16]);
784 * Allocate a Picture.
785 * The pixels are allocated/set by calling get_buffer() if shared = 0.
787 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
790 * permute block according to permuatation.
791 * @param last last non zero element in scantable order
793 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
795 static inline void ff_update_block_index(MpegEncContext *s){
796 const int block_size= 8 >> s->avctx->lowres;
798 s->block_index[0]+=2;
799 s->block_index[1]+=2;
800 s->block_index[2]+=2;
801 s->block_index[3]+=2;
804 s->dest[0]+= 2*block_size;
805 s->dest[1]+= block_size;
806 s->dest[2]+= block_size;
809 static inline int get_bits_diff(MpegEncContext *s){
810 const int bits= put_bits_count(&s->pb);
811 const int last= s->last_bits;
818 static inline int ff_h263_round_chroma(int x){
819 static const uint8_t h263_chroma_roundtab[16] = {
820 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
821 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
823 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
827 void ff_estimate_p_frame_motion(MpegEncContext * s,
829 void ff_estimate_b_frame_motion(MpegEncContext * s,
831 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
832 void ff_fix_long_p_mvs(MpegEncContext * s);
833 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
834 int16_t (*mv_table)[2], int f_code, int type, int truncate);
835 int ff_init_me(MpegEncContext *s);
836 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
837 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
838 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
839 int ref_mv_scale, int size, int h);
840 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
841 int ref_index, int size, int h, int add_rate);
844 extern const uint8_t ff_mpeg1_dc_scale_table[128];
845 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
847 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
848 void ff_mpeg1_encode_mb(MpegEncContext *s,
849 int16_t block[6][64],
850 int motion_x, int motion_y);
851 void ff_mpeg1_encode_init(MpegEncContext *s);
852 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
854 extern const uint8_t ff_aic_dc_scale_table[32];
855 extern const uint8_t ff_h263_chroma_qscale_table[32];
858 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
859 int ff_rv_decode_dc(MpegEncContext *s, int n);
860 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
864 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
865 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
866 void ff_msmpeg4_encode_mb(MpegEncContext * s,
867 int16_t block[6][64],
868 int motion_x, int motion_y);
869 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
870 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
871 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
872 void ff_msmpeg4_encode_init(MpegEncContext *s);
873 int ff_wmv2_decode_picture_header(MpegEncContext * s);
874 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
875 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
876 void ff_mspel_motion(MpegEncContext *s,
877 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
878 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
879 int motion_x, int motion_y, int h);
880 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
881 void ff_wmv2_encode_mb(MpegEncContext * s,
882 int16_t block[6][64],
883 int motion_x, int motion_y);
885 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
886 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
887 void ff_free_picture_tables(Picture *pic);
890 #endif /* AVCODEC_MPEGVIDEO_H */