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
35 #include "ratecontrol.h"
37 #include "mpeg12data.h"
41 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
51 #define MPEG_BUF_SIZE (16 * 1024)
53 #define QMAT_SHIFT_MMX 16
59 #define MAX_THREADS 16
61 #define MAX_PICTURE_COUNT 32
63 #define ME_MAP_SIZE 64
64 #define ME_MAP_SHIFT 3
65 #define ME_MAP_MV_BITS 11
67 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
69 #define INPLACE_OFFSET 16
72 #define SEQ_END_CODE 0x000001b7
73 #define SEQ_START_CODE 0x000001b3
74 #define GOP_START_CODE 0x000001b8
75 #define PICTURE_START_CODE 0x00000100
76 #define SLICE_MIN_START_CODE 0x00000101
77 #define SLICE_MAX_START_CODE 0x000001af
78 #define EXT_START_CODE 0x000001b5
79 #define USER_START_CODE 0x000001b2
81 struct MpegEncContext;
86 typedef struct Picture{
90 * halfpel luma planes.
92 uint8_t *interpolated[3];
93 int8_t *qscale_table_base;
94 int16_t (*motion_val_base[2])[2];
95 uint32_t *mb_type_base;
96 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
97 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
98 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
99 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
100 #define IS_INTRA(a) ((a)&7)
101 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
102 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
103 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
104 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
105 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
106 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
107 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
108 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
109 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
110 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
111 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
112 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
113 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
114 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
115 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
116 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
117 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
118 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note does not work if subMBs
119 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
121 int field_poc[2]; ///< h264 top/bottom POC
122 int poc; ///< h264 frame POC
123 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
124 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
125 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
126 pic_num & max_pic_num; long -> long_pic_num) */
127 int long_ref; ///< 1->long term reference 0->short term reference
128 int ref_poc[2][2][16]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
129 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
130 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
131 int field_picture; ///< whether or not the picture was encoded in seperate fields
133 int mb_var_sum; ///< sum of MB variance for current frame
134 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
135 uint16_t *mb_var; ///< Table for MB variances
136 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
137 uint8_t *mb_mean; ///< Table for MB luminance
138 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
139 int b_frame_score; /* */
140 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
144 * Motion estimation context.
146 typedef struct MotionEstContext{
147 AVCodecContext *avctx;
148 int skip; ///< set if ME is skipped for the current MB
149 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
150 int direct_basis_mv[4][2];
151 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
156 uint32_t *map; ///< map to avoid duplicate evaluations
157 uint32_t *score_map; ///< map to store the scores
159 int pre_penalty_factor;
160 int penalty_factor; /**< an estimate of the bits required to
161 code a given mv value, e.g. (1,0) takes
162 more bits than (0,0). We have to
163 estimate whether any reduction in
164 residual is worth the extra bits. */
165 int sub_penalty_factor;
166 int mb_penalty_factor;
170 int pre_pass; ///< = 1 for the pre pass
182 /* temp variables for picture complexity calculation */
183 int mc_mb_var_sum_temp;
185 int scene_change_score;
186 /* cmp, chroma_cmp;*/
187 op_pixels_func (*hpel_put)[4];
188 op_pixels_func (*hpel_avg)[4];
189 qpel_mc_func (*qpel_put)[16];
190 qpel_mc_func (*qpel_avg)[16];
191 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
192 uint8_t *current_mv_penalty;
193 int (*sub_motion_search)(struct MpegEncContext * s,
194 int *mx_ptr, int *my_ptr, int dmin,
195 int src_index, int ref_index,
202 typedef struct MpegEncContext {
204 struct AVCodecContext *avctx;
205 /* the following parameters must be initialized before encoding */
206 int width, height;///< picture size. must be a multiple of 16
208 int intra_only; ///< if true, only intra pictures are generated
209 int bit_rate; ///< wanted bit rate
210 enum OutputFormat out_format; ///< output format
211 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
212 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
214 /* the following codec id fields are deprecated in favor of codec_id */
215 int h263_plus; ///< h263 plus headers
216 int h263_flv; ///< use flv h263 header
218 enum CodecID codec_id; /* see CODEC_ID_xxx */
219 int fixed_qscale; ///< fixed qscale if non zero
220 int encoding; ///< true if we are encoding (vs decoding)
221 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
222 int flags2; ///< AVCodecContext.flags2
223 int max_b_frames; ///< max number of b-frames for encoding
224 int luma_elim_threshold;
225 int chroma_elim_threshold;
226 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
227 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
228 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
229 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
230 /* the following fields are managed internally by the encoder */
232 /* sequence parameters */
233 int context_initialized;
234 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
235 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
236 int picture_number; //FIXME remove, unclear definition
237 int picture_in_gop_number; ///< 0-> first pic in gop, ...
238 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
239 int mb_width, mb_height; ///< number of MBs horizontally & vertically
240 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
241 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
242 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
243 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
244 int mb_num; ///< number of MBs of a picture
245 int linesize; ///< line size, in bytes, may be different from width
246 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
247 Picture *picture; ///< main picture buffer
248 Picture **input_picture; ///< next pictures on display order for encoding
249 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
251 int y_dc_scale, c_dc_scale;
253 int block_last_index[12]; ///< last non zero coefficient in block
254 int h263_aic; ///< Advanded INTRA Coding (AIC)
257 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
258 ScanTable intra_scantable;
259 ScanTable intra_h_scantable;
260 ScanTable intra_v_scantable;
262 /* WARNING: changes above this line require updates to hardcoded
263 * offsets used in asm. */
265 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
270 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
271 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
272 struct MpegEncContext *thread_context[MAX_THREADS];
275 * copy of the previous picture structure.
276 * note, linesize & data, might not match the previous picture (for field pictures)
278 Picture last_picture;
281 * copy of the next picture structure.
282 * note, linesize & data, might not match the next picture (for field pictures)
284 Picture next_picture;
287 * copy of the source picture structure for encoding.
288 * note, linesize & data, might not match the source picture (for field pictures)
293 * copy of the current picture structure.
294 * note, linesize & data, might not match the current picture (for field pictures)
296 Picture current_picture; ///< buffer to store the decompressed current picture
298 Picture *last_picture_ptr; ///< pointer to the previous picture.
299 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
300 Picture *current_picture_ptr; ///< pointer to the current picture
301 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
302 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
303 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
304 int last_dc[3]; ///< last DC values for MPEG1
305 int16_t *dc_val_base;
306 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
307 int16_t dc_cache[4*5];
308 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
309 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
310 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
311 uint8_t *coded_block_base;
312 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
313 int16_t (*ac_val_base)[16];
314 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
315 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
316 #define PREV_PICT_TYPES_BUFFER_SIZE 256
317 int mb_skipped; ///< MUST BE SET only during DECODING
318 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
319 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
320 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
321 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
322 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
323 uint8_t *allocated_edge_emu_buffer;
324 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
325 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
326 uint8_t *obmc_scratchpad;
327 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
330 int chroma_qscale; ///< chroma QP
331 unsigned int lambda; ///< lagrange multipler used in rate distortion
332 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
334 int adaptive_quant; ///< use adaptive quantization
335 int dquant; ///< qscale difference to prev qscale
336 int closed_gop; ///< MPEG1/2 GOP is closed
337 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
338 int last_pict_type; //FIXME removes
339 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
341 int frame_rate_index;
342 int last_lambda_for[5]; ///< last lambda for a specific pict type
343 int skipdct; ///< skip dct and code zero residual
345 /* motion compensation */
346 int unrestricted_mv; ///< mv can point outside of the coded picture
347 int h263_long_vectors; ///< use horrible h263v1 long vector mode
348 int decode; ///< if 0 then decoding will be skipped (for encoding b frames for example)
350 DSPContext dsp; ///< pointers for accelerated dsp functions
351 int f_code; ///< forward MV resolution
352 int b_code; ///< backward MV resolution for B Frames (mpeg4)
353 int16_t (*p_mv_table_base)[2];
354 int16_t (*b_forw_mv_table_base)[2];
355 int16_t (*b_back_mv_table_base)[2];
356 int16_t (*b_bidir_forw_mv_table_base)[2];
357 int16_t (*b_bidir_back_mv_table_base)[2];
358 int16_t (*b_direct_mv_table_base)[2];
359 int16_t (*p_field_mv_table_base[2][2])[2];
360 int16_t (*b_field_mv_table_base[2][2][2])[2];
361 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
362 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
363 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
364 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
365 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
366 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
367 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
368 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
369 uint8_t (*p_field_select_table[2]);
370 uint8_t (*b_field_select_table[2][2]);
371 int me_method; ///< ME algorithm
373 #define MV_DIR_FORWARD 1
374 #define MV_DIR_BACKWARD 2
375 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
377 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
378 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
379 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
380 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
381 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
382 /**motion vectors for a macroblock
383 first coordinate : 0 = forward 1 = backward
384 second " : depend on type
385 third " : 0 = x, 1 = y
388 int field_select[2][2];
389 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
390 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
391 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
395 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
396 for b-frames rounding mode is always 0 */
398 /* macroblock layer */
402 uint16_t *mb_type; ///< Table for candidate MB types for encoding
403 #define CANDIDATE_MB_TYPE_INTRA 0x01
404 #define CANDIDATE_MB_TYPE_INTER 0x02
405 #define CANDIDATE_MB_TYPE_INTER4V 0x04
406 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
407 //#define MB_TYPE_GMC 0x10
409 #define CANDIDATE_MB_TYPE_DIRECT 0x10
410 #define CANDIDATE_MB_TYPE_FORWARD 0x20
411 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
412 #define CANDIDATE_MB_TYPE_BIDIR 0x80
414 #define CANDIDATE_MB_TYPE_INTER_I 0x100
415 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
416 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
417 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
419 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
421 int block_index[6]; ///< index to current MB in block based arrays with edges
425 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
427 /** matrix transmitted in the bitstream */
428 uint16_t intra_matrix[64];
429 uint16_t chroma_intra_matrix[64];
430 uint16_t inter_matrix[64];
431 uint16_t chroma_inter_matrix[64];
432 #define QUANT_BIAS_SHIFT 8
433 int intra_quant_bias; ///< bias for the quantizer
434 int inter_quant_bias; ///< bias for the quantizer
435 int min_qcoeff; ///< minimum encodable coefficient
436 int max_qcoeff; ///< maximum encodable coefficient
437 int ac_esc_length; ///< num of bits needed to encode the longest esc
438 uint8_t *intra_ac_vlc_length;
439 uint8_t *intra_ac_vlc_last_length;
440 uint8_t *inter_ac_vlc_length;
441 uint8_t *inter_ac_vlc_last_length;
442 uint8_t *luma_dc_vlc_length;
443 uint8_t *chroma_dc_vlc_length;
444 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
448 /** precomputed matrix (combine qscale and DCT renorm) */
449 int (*q_intra_matrix)[64];
450 int (*q_inter_matrix)[64];
451 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
452 uint16_t (*q_intra_matrix16)[2][64];
453 uint16_t (*q_inter_matrix16)[2][64];
455 /* noise reduction */
456 int (*dct_error_sum)[64];
458 uint16_t (*dct_offset)[64];
460 void *opaque; ///< private data for the user
462 /* bit rate control */
465 int frame_bits; ///< bits used for the current frame
466 int next_lambda; ///< next lambda used for retrying to encode a frame
467 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
469 /* statistics, used for 2-pass encoding */
478 int misc_bits; ///< cbp, mb_type
479 int last_bits; ///< temp var used for calculating the above vars
481 /* error concealment / resync */
482 int error_count, error_occurred;
483 uint8_t *error_status_table; ///< table of the error status of each MB
484 #define VP_START 1 ///< current MB is the first after a resync marker
493 int resync_mb_x; ///< x position of last resync marker
494 int resync_mb_y; ///< y position of last resync marker
495 GetBitContext last_resync_gb; ///< used to search for the next resync marker
496 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
497 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
498 int error_recognition;
500 ParseContext parse_context;
504 int obmc; ///< overlapped block motion compensation
505 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
507 /* H.263+ specific */
508 int umvplus; ///< == H263+ && unrestricted_mv
509 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
510 int h263_slice_structured;
511 int alt_inter_vlc; ///< alternative inter vlc
517 int time_increment_bits; ///< number of bits to represent the fractional part of time
519 int time_base; ///< time in seconds of last I,P,S Frame
520 int64_t time; ///< time of current frame
521 int64_t last_non_b_time;
522 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
523 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
524 uint16_t pp_field_time;
525 uint16_t pb_field_time; ///< like above, just for interlaced
527 int vol_sprite_usage;
532 int sprite_brightness_change;
533 int num_sprite_warping_points;
534 int real_sprite_warping_points;
535 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
536 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
537 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
538 int sprite_shift[2]; ///< sprite shift [isChroma]
541 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
544 int enhancement_type;
547 int aspect_ratio_info; //FIXME remove
548 int sprite_warping_accuracy;
549 int low_latency_sprite;
550 int data_partitioning; ///< data partitioning flag from header
551 int partitioned_frame; ///< is current frame partitioned
552 int rvlc; ///< reversible vlc
553 int resync_marker; ///< could this stream contain resync markers
554 int low_delay; ///< no reordering needed / has no b-frames
556 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
557 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
558 int use_intra_dc_vlc;
559 PutBitContext tex_pb; ///< used for data partitioned VOPs
560 PutBitContext pb2; ///< used for data partitioned VOPs
562 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
563 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
564 int cplx_estimation_trash_i;
565 int cplx_estimation_trash_p;
566 int cplx_estimation_trash_b;
568 /* divx specific, used to workaround (many) bugs in divx5 */
572 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
573 int bitstream_buffer_size;
574 unsigned int allocated_bitstream_buffer_size;
578 /* lavc specific stuff, used to workaround bugs in libavcodec */
582 int rv10_version; ///< RV10 version: 0 or 3
583 int rv10_first_dc_coded[3];
584 int orig_width, orig_height;
587 struct MJpegContext *mjpeg_ctx;
588 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
589 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
591 /* MSMPEG4 specific */
594 int rl_chroma_table_index;
596 int use_skip_mb_code;
597 int slice_height; ///< in macroblocks
598 int first_slice_line; ///< used in mpeg4 too to handle resync markers
599 int flipflop_rounding;
600 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
602 int esc3_level_length;
604 /** [mb_intra][isChroma][level][run][last] */
605 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
606 int inter_intra_pred;
609 /* decompression specific */
613 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
614 int last_mv_dir; ///< last mv_dir, used for b frame encoding
615 int broken_link; ///< no_output_of_prior_pics_flag
616 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
618 /* MPEG-2-specific - I wished not to have to support this mess. */
619 int progressive_sequence;
620 int mpeg_f_code[2][2];
621 int picture_structure;
623 #define PICT_TOP_FIELD 1
624 #define PICT_BOTTOM_FIELD 2
627 int intra_dc_precision;
628 int frame_pred_frame_dct;
630 int concealment_motion_vectors;
632 int intra_vlc_format;
634 int repeat_first_field;
640 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
643 int progressive_frame;
647 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
648 int drop_frame_timecode; ///< timecode is in drop frame format.
649 int scan_offset; ///< reserve space for SVCD scan offset user data.
654 struct ff_timecode tc;
656 uint8_t *ptr_lastgob;
657 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
658 DCTELEM (*pblocks[12])[64];
660 DCTELEM (*block)[64]; ///< points to one of the following blocks
661 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
662 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
664 #define SLICE_ERROR -1
665 #define SLICE_END -2 ///<end marker found
666 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
668 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
669 DCTELEM *block/*align 16*/, int n, int qscale);
670 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
671 DCTELEM *block/*align 16*/, int n, int qscale);
672 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
673 DCTELEM *block/*align 16*/, int n, int qscale);
674 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
675 DCTELEM *block/*align 16*/, int n, int qscale);
676 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
677 DCTELEM *block/*align 16*/, int n, int qscale);
678 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
679 DCTELEM *block/*align 16*/, int n, int qscale);
680 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
681 DCTELEM *block/*align 16*/, int n, int qscale);
682 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
683 DCTELEM *block/*align 16*/, int n, int qscale);
684 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
685 DCTELEM *block/*align 16*/, int n, int qscale);
686 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
687 DCTELEM *block/*align 16*/, int n, int qscale);
688 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
689 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
690 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
693 #define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \
694 (pic >= old_ctx->picture && pic < old_ctx->picture+old_ctx->picture_count ?\
695 &new_ctx->picture[pic - old_ctx->picture] : pic - (Picture*)old_ctx + (Picture*)new_ctx)\
698 void MPV_decode_defaults(MpegEncContext *s);
699 int MPV_common_init(MpegEncContext *s);
700 void MPV_common_end(MpegEncContext *s);
701 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
702 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
703 void MPV_frame_end(MpegEncContext *s);
704 int MPV_encode_init(AVCodecContext *avctx);
705 int MPV_encode_end(AVCodecContext *avctx);
706 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
707 void MPV_common_init_mmx(MpegEncContext *s);
708 void MPV_common_init_axp(MpegEncContext *s);
709 void MPV_common_init_mlib(MpegEncContext *s);
710 void MPV_common_init_mmi(MpegEncContext *s);
711 void MPV_common_init_arm(MpegEncContext *s);
712 void MPV_common_init_altivec(MpegEncContext *s);
713 void MPV_common_init_bfin(MpegEncContext *s);
714 void ff_clean_intra_table_entries(MpegEncContext *s);
715 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
716 void ff_mpeg_flush(AVCodecContext *avctx);
717 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
718 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
719 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
720 int ff_find_unused_picture(MpegEncContext *s, int shared);
721 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
722 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
723 int MPV_lowest_referenced_row(MpegEncContext *s, int dir);
724 void MPV_report_decode_progress(MpegEncContext *s);
725 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
726 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
727 void ff_set_qscale(MpegEncContext * s, int qscale);
729 void ff_er_frame_start(MpegEncContext *s);
730 void ff_er_frame_end(MpegEncContext *s);
731 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
733 int ff_dct_common_init(MpegEncContext *s);
734 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
735 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
737 void ff_init_block_index(MpegEncContext *s);
738 void ff_copy_picture(Picture *dst, Picture *src);
741 * allocates a Picture
742 * The pixels are allocated/set by calling get_buffer() if shared=0
744 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
746 extern const enum PixelFormat ff_pixfmt_list_420[];
747 extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[];
749 static inline void ff_update_block_index(MpegEncContext *s){
750 const int block_size= 8>>s->avctx->lowres;
752 s->block_index[0]+=2;
753 s->block_index[1]+=2;
754 s->block_index[2]+=2;
755 s->block_index[3]+=2;
758 s->dest[0]+= 2*block_size;
759 s->dest[1]+= block_size;
760 s->dest[2]+= block_size;
763 static inline int get_bits_diff(MpegEncContext *s){
764 const int bits= put_bits_count(&s->pb);
765 const int last= s->last_bits;
772 static inline int ff_h263_round_chroma(int x){
773 static const uint8_t h263_chroma_roundtab[16] = {
774 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
775 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
777 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
781 void ff_estimate_p_frame_motion(MpegEncContext * s,
783 void ff_estimate_b_frame_motion(MpegEncContext * s,
785 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
786 void ff_fix_long_p_mvs(MpegEncContext * s);
787 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
788 int16_t (*mv_table)[2], int f_code, int type, int truncate);
789 int ff_init_me(MpegEncContext *s);
790 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
791 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
792 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
793 int ref_mv_scale, int size, int h);
794 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
795 int ref_index, int size, int h, int add_rate);
798 extern const uint8_t ff_mpeg1_dc_scale_table[128];
799 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
801 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
802 void mpeg1_encode_mb(MpegEncContext *s,
803 DCTELEM block[6][64],
804 int motion_x, int motion_y);
805 void ff_mpeg1_encode_init(MpegEncContext *s);
806 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
807 void ff_mpeg1_clean_buffers(MpegEncContext *s);
808 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
810 extern const uint8_t ff_aic_dc_scale_table[32];
811 extern const uint8_t ff_h263_chroma_qscale_table[32];
812 extern const uint8_t ff_h263_loop_filter_strength[32];
815 void ff_h261_loop_filter(MpegEncContext *s);
816 void ff_h261_reorder_mb_index(MpegEncContext* s);
817 void ff_h261_encode_mb(MpegEncContext *s,
818 DCTELEM block[6][64],
819 int motion_x, int motion_y);
820 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
821 void ff_h261_encode_init(MpegEncContext *s);
822 int ff_h261_get_picture_format(int width, int height);
826 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
827 int rv_decode_dc(MpegEncContext *s, int n);
828 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
832 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
833 void msmpeg4_encode_ext_header(MpegEncContext * s);
834 void msmpeg4_encode_mb(MpegEncContext * s,
835 DCTELEM block[6][64],
836 int motion_x, int motion_y);
837 int msmpeg4_decode_picture_header(MpegEncContext * s);
838 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
839 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
840 void ff_msmpeg4_encode_init(MpegEncContext *s);
841 int ff_wmv2_decode_picture_header(MpegEncContext * s);
842 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
843 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
844 void ff_mspel_motion(MpegEncContext *s,
845 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
846 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
847 int motion_x, int motion_y, int h);
848 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
849 void ff_wmv2_encode_mb(MpegEncContext * s,
850 DCTELEM block[6][64],
851 int motion_x, int motion_y);
853 #endif /* AVCODEC_MPEGVIDEO_H */