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"
40 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
50 #define MPEG_BUF_SIZE (16 * 1024)
52 #define QMAT_SHIFT_MMX 16
58 #define MAX_THREADS 16
60 #define MAX_PICTURE_COUNT 32
62 #define ME_MAP_SIZE 64
63 #define ME_MAP_SHIFT 3
64 #define ME_MAP_MV_BITS 11
66 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
68 #define INPLACE_OFFSET 16
71 #define SEQ_END_CODE 0x000001b7
72 #define SEQ_START_CODE 0x000001b3
73 #define GOP_START_CODE 0x000001b8
74 #define PICTURE_START_CODE 0x00000100
75 #define SLICE_MIN_START_CODE 0x00000101
76 #define SLICE_MAX_START_CODE 0x000001af
77 #define EXT_START_CODE 0x000001b5
78 #define USER_START_CODE 0x000001b2
80 struct MpegEncContext;
85 typedef struct Picture{
89 * halfpel luma planes.
91 uint8_t *interpolated[3];
92 int8_t *qscale_table_base;
93 int16_t (*motion_val_base[2])[2];
94 uint32_t *mb_type_base;
95 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
96 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
97 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
98 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
99 #define IS_INTRA(a) ((a)&7)
100 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
101 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
102 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
103 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
104 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
105 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
106 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
107 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
108 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
109 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
110 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
111 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
112 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
113 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
114 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
115 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
116 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
117 #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
118 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
120 int field_poc[2]; ///< h264 top/bottom POC
121 int poc; ///< h264 frame POC
122 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
123 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
124 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
125 pic_num & max_pic_num; long -> long_pic_num) */
126 int long_ref; ///< 1->long term reference 0->short term reference
127 int ref_poc[2][2][16]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
128 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
129 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
130 int field_picture; ///< whether or not the picture was encoded in seperate fields
132 int mb_var_sum; ///< sum of MB variance for current frame
133 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
134 uint16_t *mb_var; ///< Table for MB variances
135 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
136 uint8_t *mb_mean; ///< Table for MB luminance
137 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
138 int b_frame_score; /* */
139 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
143 * Motion estimation context.
145 typedef struct MotionEstContext{
146 AVCodecContext *avctx;
147 int skip; ///< set if ME is skipped for the current MB
148 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
149 int direct_basis_mv[4][2];
150 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
155 uint32_t *map; ///< map to avoid duplicate evaluations
156 uint32_t *score_map; ///< map to store the scores
158 int pre_penalty_factor;
159 int penalty_factor; /**< an estimate of the bits required to
160 code a given mv value, e.g. (1,0) takes
161 more bits than (0,0). We have to
162 estimate whether any reduction in
163 residual is worth the extra bits. */
164 int sub_penalty_factor;
165 int mb_penalty_factor;
169 int pre_pass; ///< = 1 for the pre pass
181 /* temp variables for picture complexity calculation */
182 int mc_mb_var_sum_temp;
184 int scene_change_score;
185 /* cmp, chroma_cmp;*/
186 op_pixels_func (*hpel_put)[4];
187 op_pixels_func (*hpel_avg)[4];
188 qpel_mc_func (*qpel_put)[16];
189 qpel_mc_func (*qpel_avg)[16];
190 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
191 uint8_t *current_mv_penalty;
192 int (*sub_motion_search)(struct MpegEncContext * s,
193 int *mx_ptr, int *my_ptr, int dmin,
194 int src_index, int ref_index,
201 typedef struct MpegEncContext {
202 struct AVCodecContext *avctx;
203 /* the following parameters must be initialized before encoding */
204 int width, height;///< picture size. must be a multiple of 16
206 int intra_only; ///< if true, only intra pictures are generated
207 int bit_rate; ///< wanted bit rate
208 enum OutputFormat out_format; ///< output format
209 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
210 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
212 /* the following codec id fields are deprecated in favor of codec_id */
213 int h263_plus; ///< h263 plus headers
214 int h263_flv; ///< use flv h263 header
216 enum CodecID codec_id; /* see CODEC_ID_xxx */
217 int fixed_qscale; ///< fixed qscale if non zero
218 int encoding; ///< true if we are encoding (vs decoding)
219 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
220 int flags2; ///< AVCodecContext.flags2
221 int max_b_frames; ///< max number of b-frames for encoding
222 int luma_elim_threshold;
223 int chroma_elim_threshold;
224 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
225 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
226 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
227 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
228 /* the following fields are managed internally by the encoder */
230 /* sequence parameters */
231 int context_initialized;
232 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
233 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
234 int picture_number; //FIXME remove, unclear definition
235 int picture_in_gop_number; ///< 0-> first pic in gop, ...
236 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
237 int mb_width, mb_height; ///< number of MBs horizontally & vertically
238 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
239 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
240 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
241 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
242 int mb_num; ///< number of MBs of a picture
243 int linesize; ///< line size, in bytes, may be different from width
244 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
245 Picture *picture; ///< main picture buffer
246 Picture **input_picture; ///< next pictures on display order for encoding
247 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
249 int y_dc_scale, c_dc_scale;
251 int block_last_index[12]; ///< last non zero coefficient in block
252 int h263_aic; ///< Advanded INTRA Coding (AIC)
255 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
256 ScanTable intra_scantable;
257 ScanTable intra_h_scantable;
258 ScanTable intra_v_scantable;
260 /* WARNING: changes above this line require updates to hardcoded
261 * offsets used in asm. */
263 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
268 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
269 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
270 struct MpegEncContext *thread_context[MAX_THREADS];
273 * copy of the previous picture structure.
274 * note, linesize & data, might not match the previous picture (for field pictures)
276 Picture last_picture;
279 * copy of the next picture structure.
280 * note, linesize & data, might not match the next picture (for field pictures)
282 Picture next_picture;
285 * copy of the source picture structure for encoding.
286 * note, linesize & data, might not match the source picture (for field pictures)
291 * copy of the current picture structure.
292 * note, linesize & data, might not match the current picture (for field pictures)
294 Picture current_picture; ///< buffer to store the decompressed current picture
296 Picture *last_picture_ptr; ///< pointer to the previous picture.
297 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
298 Picture *current_picture_ptr; ///< pointer to the current picture
299 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
300 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
301 uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
302 int last_dc[3]; ///< last DC values for MPEG1
303 int16_t *dc_val_base;
304 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
305 int16_t dc_cache[4*5];
306 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
307 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
308 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
309 uint8_t *coded_block_base;
310 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
311 int16_t (*ac_val_base)[16];
312 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
313 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
314 #define PREV_PICT_TYPES_BUFFER_SIZE 256
315 int mb_skipped; ///< MUST BE SET only during DECODING
316 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
317 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
318 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
319 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
320 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
321 uint8_t *allocated_edge_emu_buffer;
322 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
323 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
324 uint8_t *obmc_scratchpad;
325 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
328 int chroma_qscale; ///< chroma QP
329 unsigned int lambda; ///< lagrange multipler used in rate distortion
330 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
332 int adaptive_quant; ///< use adaptive quantization
333 int dquant; ///< qscale difference to prev qscale
334 int closed_gop; ///< MPEG1/2 GOP is closed
335 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
336 int last_pict_type; //FIXME removes
337 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
339 int frame_rate_index;
340 int last_lambda_for[5]; ///< last lambda for a specific pict type
341 int skipdct; ///< skip dct and code zero residual
343 /* motion compensation */
344 int unrestricted_mv; ///< mv can point outside of the coded picture
345 int h263_long_vectors; ///< use horrible h263v1 long vector mode
346 int decode; ///< if 0 then decoding will be skipped (for encoding b frames for example)
348 DSPContext dsp; ///< pointers for accelerated dsp functions
349 int f_code; ///< forward MV resolution
350 int b_code; ///< backward MV resolution for B Frames (mpeg4)
351 int16_t (*p_mv_table_base)[2];
352 int16_t (*b_forw_mv_table_base)[2];
353 int16_t (*b_back_mv_table_base)[2];
354 int16_t (*b_bidir_forw_mv_table_base)[2];
355 int16_t (*b_bidir_back_mv_table_base)[2];
356 int16_t (*b_direct_mv_table_base)[2];
357 int16_t (*p_field_mv_table_base[2][2])[2];
358 int16_t (*b_field_mv_table_base[2][2][2])[2];
359 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
360 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
361 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
362 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
363 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
364 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
365 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
366 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
367 uint8_t (*p_field_select_table[2]);
368 uint8_t (*b_field_select_table[2][2]);
369 int me_method; ///< ME algorithm
371 #define MV_DIR_FORWARD 1
372 #define MV_DIR_BACKWARD 2
373 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
375 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
376 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
377 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
378 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
379 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
380 /**motion vectors for a macroblock
381 first coordinate : 0 = forward 1 = backward
382 second " : depend on type
383 third " : 0 = x, 1 = y
386 int field_select[2][2];
387 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
388 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
389 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
393 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
394 for b-frames rounding mode is always 0 */
396 /* macroblock layer */
400 uint16_t *mb_type; ///< Table for candidate MB types for encoding
401 #define CANDIDATE_MB_TYPE_INTRA 0x01
402 #define CANDIDATE_MB_TYPE_INTER 0x02
403 #define CANDIDATE_MB_TYPE_INTER4V 0x04
404 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
405 //#define MB_TYPE_GMC 0x10
407 #define CANDIDATE_MB_TYPE_DIRECT 0x10
408 #define CANDIDATE_MB_TYPE_FORWARD 0x20
409 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
410 #define CANDIDATE_MB_TYPE_BIDIR 0x80
412 #define CANDIDATE_MB_TYPE_INTER_I 0x100
413 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
414 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
415 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
417 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
419 int block_index[6]; ///< index to current MB in block based arrays with edges
423 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
425 /** matrix transmitted in the bitstream */
426 uint16_t intra_matrix[64];
427 uint16_t chroma_intra_matrix[64];
428 uint16_t inter_matrix[64];
429 uint16_t chroma_inter_matrix[64];
430 #define QUANT_BIAS_SHIFT 8
431 int intra_quant_bias; ///< bias for the quantizer
432 int inter_quant_bias; ///< bias for the quantizer
433 int min_qcoeff; ///< minimum encodable coefficient
434 int max_qcoeff; ///< maximum encodable coefficient
435 int ac_esc_length; ///< num of bits needed to encode the longest esc
436 uint8_t *intra_ac_vlc_length;
437 uint8_t *intra_ac_vlc_last_length;
438 uint8_t *inter_ac_vlc_length;
439 uint8_t *inter_ac_vlc_last_length;
440 uint8_t *luma_dc_vlc_length;
441 uint8_t *chroma_dc_vlc_length;
442 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
446 /** precomputed matrix (combine qscale and DCT renorm) */
447 int (*q_intra_matrix)[64];
448 int (*q_inter_matrix)[64];
449 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
450 uint16_t (*q_intra_matrix16)[2][64];
451 uint16_t (*q_inter_matrix16)[2][64];
453 /* noise reduction */
454 int (*dct_error_sum)[64];
456 uint16_t (*dct_offset)[64];
458 void *opaque; ///< private data for the user
460 /* bit rate control */
463 int frame_bits; ///< bits used for the current frame
464 int next_lambda; ///< next lambda used for retrying to encode a frame
465 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
467 /* statistics, used for 2-pass encoding */
476 int misc_bits; ///< cbp, mb_type
477 int last_bits; ///< temp var used for calculating the above vars
479 /* error concealment / resync */
480 int error_count, error_occurred;
481 uint8_t *error_status_table; ///< table of the error status of each MB
482 #define VP_START 1 ///< current MB is the first after a resync marker
491 int resync_mb_x; ///< x position of last resync marker
492 int resync_mb_y; ///< y position of last resync marker
493 GetBitContext last_resync_gb; ///< used to search for the next resync marker
494 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
495 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
496 int error_recognition;
498 ParseContext parse_context;
502 int obmc; ///< overlapped block motion compensation
503 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
505 /* H.263+ specific */
506 int umvplus; ///< == H263+ && unrestricted_mv
507 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
508 int h263_slice_structured;
509 int alt_inter_vlc; ///< alternative inter vlc
515 int time_increment_bits; ///< number of bits to represent the fractional part of time
517 int time_base; ///< time in seconds of last I,P,S Frame
518 int64_t time; ///< time of current frame
519 int64_t last_non_b_time;
520 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
521 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
522 uint16_t pp_field_time;
523 uint16_t pb_field_time; ///< like above, just for interlaced
525 int vol_sprite_usage;
530 int sprite_brightness_change;
531 int num_sprite_warping_points;
532 int real_sprite_warping_points;
533 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
534 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
535 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
536 int sprite_shift[2]; ///< sprite shift [isChroma]
539 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
542 int enhancement_type;
545 int aspect_ratio_info; //FIXME remove
546 int sprite_warping_accuracy;
547 int low_latency_sprite;
548 int data_partitioning; ///< data partitioning flag from header
549 int partitioned_frame; ///< is current frame partitioned
550 int rvlc; ///< reversible vlc
551 int resync_marker; ///< could this stream contain resync markers
552 int low_delay; ///< no reordering needed / has no b-frames
554 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
555 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
556 int use_intra_dc_vlc;
557 PutBitContext tex_pb; ///< used for data partitioned VOPs
558 PutBitContext pb2; ///< used for data partitioned VOPs
560 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
561 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
562 int cplx_estimation_trash_i;
563 int cplx_estimation_trash_p;
564 int cplx_estimation_trash_b;
566 /* divx specific, used to workaround (many) bugs in divx5 */
570 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
571 int bitstream_buffer_size;
572 unsigned int allocated_bitstream_buffer_size;
576 /* lavc specific stuff, used to workaround bugs in libavcodec */
580 int rv10_version; ///< RV10 version: 0 or 3
581 int rv10_first_dc_coded[3];
582 int orig_width, orig_height;
585 struct MJpegContext *mjpeg_ctx;
586 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
587 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
589 /* MSMPEG4 specific */
592 int rl_chroma_table_index;
594 int use_skip_mb_code;
595 int slice_height; ///< in macroblocks
596 int first_slice_line; ///< used in mpeg4 too to handle resync markers
597 int flipflop_rounding;
598 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
600 int esc3_level_length;
602 /** [mb_intra][isChroma][level][run][last] */
603 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
604 int inter_intra_pred;
607 /* decompression specific */
611 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
612 int last_mv_dir; ///< last mv_dir, used for b frame encoding
613 int broken_link; ///< no_output_of_prior_pics_flag
614 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
616 /* MPEG-2-specific - I wished not to have to support this mess. */
617 int progressive_sequence;
618 int mpeg_f_code[2][2];
619 int picture_structure;
621 #define PICT_TOP_FIELD 1
622 #define PICT_BOTTOM_FIELD 2
625 int intra_dc_precision;
626 int frame_pred_frame_dct;
628 int concealment_motion_vectors;
630 int intra_vlc_format;
632 int repeat_first_field;
638 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
641 int progressive_frame;
645 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
650 uint8_t *ptr_lastgob;
651 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
652 DCTELEM (*pblocks[12])[64];
654 DCTELEM (*block)[64]; ///< points to one of the following blocks
655 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
656 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
658 #define SLICE_ERROR -1
659 #define SLICE_END -2 ///<end marker found
660 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
662 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
663 DCTELEM *block/*align 16*/, int n, int qscale);
664 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
665 DCTELEM *block/*align 16*/, int n, int qscale);
666 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
667 DCTELEM *block/*align 16*/, int n, int qscale);
668 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
669 DCTELEM *block/*align 16*/, int n, int qscale);
670 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
671 DCTELEM *block/*align 16*/, int n, int qscale);
672 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
673 DCTELEM *block/*align 16*/, int n, int qscale);
674 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
675 DCTELEM *block/*align 16*/, int n, int qscale);
676 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
677 DCTELEM *block/*align 16*/, int n, int qscale);
678 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
679 DCTELEM *block/*align 16*/, int n, int qscale);
680 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
681 DCTELEM *block/*align 16*/, int n, int qscale);
682 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
683 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
684 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
687 #define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \
688 (pic >= old_ctx->picture && pic < old_ctx->picture+old_ctx->picture_count ?\
689 &new_ctx->picture[pic - old_ctx->picture] : pic - (Picture*)old_ctx + (Picture*)new_ctx)\
692 void MPV_decode_defaults(MpegEncContext *s);
693 int MPV_common_init(MpegEncContext *s);
694 void MPV_common_end(MpegEncContext *s);
695 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
696 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
697 void MPV_frame_end(MpegEncContext *s);
698 int MPV_encode_init(AVCodecContext *avctx);
699 int MPV_encode_end(AVCodecContext *avctx);
700 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
701 void MPV_common_init_mmx(MpegEncContext *s);
702 void MPV_common_init_axp(MpegEncContext *s);
703 void MPV_common_init_mlib(MpegEncContext *s);
704 void MPV_common_init_mmi(MpegEncContext *s);
705 void MPV_common_init_arm(MpegEncContext *s);
706 void MPV_common_init_altivec(MpegEncContext *s);
707 void MPV_common_init_bfin(MpegEncContext *s);
708 void ff_clean_intra_table_entries(MpegEncContext *s);
709 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
710 void ff_mpeg_flush(AVCodecContext *avctx);
711 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
712 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
713 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
714 int ff_find_unused_picture(MpegEncContext *s, int shared);
715 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
716 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
717 int MPV_lowest_referenced_row(MpegEncContext *s, int dir);
718 void MPV_report_decode_progress(MpegEncContext *s);
719 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
720 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
721 void ff_set_qscale(MpegEncContext * s, int qscale);
723 void ff_er_frame_start(MpegEncContext *s);
724 void ff_er_frame_end(MpegEncContext *s);
725 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
727 int ff_dct_common_init(MpegEncContext *s);
728 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
729 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
731 void ff_init_block_index(MpegEncContext *s);
732 void ff_copy_picture(Picture *dst, Picture *src);
735 * allocates a Picture
736 * The pixels are allocated/set by calling get_buffer() if shared=0
738 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
740 extern const enum PixelFormat ff_pixfmt_list_420[];
741 extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[];
743 static inline void ff_update_block_index(MpegEncContext *s){
744 const int block_size= 8>>s->avctx->lowres;
746 s->block_index[0]+=2;
747 s->block_index[1]+=2;
748 s->block_index[2]+=2;
749 s->block_index[3]+=2;
752 s->dest[0]+= 2*block_size;
753 s->dest[1]+= block_size;
754 s->dest[2]+= block_size;
757 static inline int get_bits_diff(MpegEncContext *s){
758 const int bits= put_bits_count(&s->pb);
759 const int last= s->last_bits;
766 static inline int ff_h263_round_chroma(int x){
767 static const uint8_t h263_chroma_roundtab[16] = {
768 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
769 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
771 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
775 void ff_estimate_p_frame_motion(MpegEncContext * s,
777 void ff_estimate_b_frame_motion(MpegEncContext * s,
779 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
780 void ff_fix_long_p_mvs(MpegEncContext * s);
781 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
782 int16_t (*mv_table)[2], int f_code, int type, int truncate);
783 int ff_init_me(MpegEncContext *s);
784 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
785 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
786 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
787 int ref_mv_scale, int size, int h);
788 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
789 int ref_index, int size, int h, int add_rate);
792 extern const uint8_t ff_mpeg1_dc_scale_table[128];
793 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
795 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
796 void mpeg1_encode_mb(MpegEncContext *s,
797 DCTELEM block[6][64],
798 int motion_x, int motion_y);
799 void ff_mpeg1_encode_init(MpegEncContext *s);
800 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
801 void ff_mpeg1_clean_buffers(MpegEncContext *s);
802 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
804 extern const uint8_t ff_aic_dc_scale_table[32];
805 extern const uint8_t ff_h263_chroma_qscale_table[32];
806 extern const uint8_t ff_h263_loop_filter_strength[32];
809 void ff_h261_loop_filter(MpegEncContext *s);
810 void ff_h261_reorder_mb_index(MpegEncContext* s);
811 void ff_h261_encode_mb(MpegEncContext *s,
812 DCTELEM block[6][64],
813 int motion_x, int motion_y);
814 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
815 void ff_h261_encode_init(MpegEncContext *s);
816 int ff_h261_get_picture_format(int width, int height);
820 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
821 int rv_decode_dc(MpegEncContext *s, int n);
822 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
826 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
827 void msmpeg4_encode_ext_header(MpegEncContext * s);
828 void msmpeg4_encode_mb(MpegEncContext * s,
829 DCTELEM block[6][64],
830 int motion_x, int motion_y);
831 int msmpeg4_decode_picture_header(MpegEncContext * s);
832 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
833 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
834 void ff_msmpeg4_encode_init(MpegEncContext *s);
835 int ff_wmv2_decode_picture_header(MpegEncContext * s);
836 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
837 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
838 void ff_mspel_motion(MpegEncContext *s,
839 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
840 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
841 int motion_x, int motion_y, int h);
842 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
843 void ff_wmv2_encode_mb(MpegEncContext * s,
844 DCTELEM block[6][64],
845 int motion_x, int motion_y);
847 #endif /* AVCODEC_MPEGVIDEO_H */