74fa23d3b20f881181f58766e9f2f0b07d225050
[libav.git] / libavcodec / mpegvideo.h
1 /*
2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 /**
21 * @file mpegvideo.h
22 * mpegvideo header.
23 */
24
25 #ifndef AVCODEC_MPEGVIDEO_H
26 #define AVCODEC_MPEGVIDEO_H
27
28 #include "dsputil.h"
29
30 #define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
31
32 enum OutputFormat {
33 FMT_MPEG1,
34 FMT_H263,
35 FMT_MJPEG,
36 FMT_H264,
37 };
38
39 #define EDGE_WIDTH 16
40
41 #define MPEG_BUF_SIZE (16 * 1024)
42
43 #define QMAT_SHIFT_MMX 16
44 #define QMAT_SHIFT 22
45
46 #define MAX_FCODE 7
47 #define MAX_MV 2048
48
49 #define MAX_PICTURE_COUNT 15
50
51 #define ME_MAP_SIZE 64
52 #define ME_MAP_SHIFT 3
53 #define ME_MAP_MV_BITS 11
54
55 /* run length table */
56 #define MAX_RUN 64
57 #define MAX_LEVEL 64
58
59 #define I_TYPE FF_I_TYPE ///< Intra
60 #define P_TYPE FF_P_TYPE ///< Predicted
61 #define B_TYPE FF_B_TYPE ///< Bi-dir predicted
62 #define S_TYPE FF_S_TYPE ///< S(GMC)-VOP MPEG4
63 #define SI_TYPE FF_SI_TYPE ///< Switching Intra
64 #define SP_TYPE FF_SP_TYPE ///< Switching Predicted
65
66 typedef struct Predictor{
67 double coeff;
68 double count;
69 double decay;
70 } Predictor;
71
72 typedef struct RateControlEntry{
73 int pict_type;
74 float qscale;
75 int mv_bits;
76 int i_tex_bits;
77 int p_tex_bits;
78 int misc_bits;
79 uint64_t expected_bits;
80 int new_pict_type;
81 float new_qscale;
82 int mc_mb_var_sum;
83 int mb_var_sum;
84 int i_count;
85 int f_code;
86 int b_code;
87 }RateControlEntry;
88
89 /**
90 * rate control context.
91 */
92 typedef struct RateControlContext{
93 FILE *stats_file;
94 int num_entries; ///< number of RateControlEntries
95 RateControlEntry *entry;
96 int buffer_index; ///< amount of bits in the video/audio buffer
97 Predictor pred[5];
98 double short_term_qsum; ///< sum of recent qscales
99 double short_term_qcount; ///< count of recent qscales
100 double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
101 double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init)
102 double last_qscale;
103 double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
104 int last_mc_mb_var_sum;
105 int last_mb_var_sum;
106 uint64_t i_cplx_sum[5];
107 uint64_t p_cplx_sum[5];
108 uint64_t mv_bits_sum[5];
109 uint64_t qscale_sum[5];
110 int frame_count[5];
111 int last_non_b_pict_type;
112 }RateControlContext;
113
114 /**
115 * Scantable.
116 */
117 typedef struct ScanTable{
118 const uint8_t *scantable;
119 uint8_t permutated[64];
120 uint8_t raster_end[64];
121 #ifdef ARCH_POWERPC
122 /** Used by dct_quantise_alitvec to find last-non-zero */
123 uint8_t __align8 inverse[64];
124 #endif
125 } ScanTable;
126
127 /**
128 * Picture.
129 */
130 typedef struct Picture{
131 FF_COMMON_FRAME
132
133 /**
134 * halfpel luma planes.
135 */
136 uint8_t *interpolated[3];
137
138 int16_t (*motion_val[2])[2];
139 int8_t *ref_index[2];
140 uint32_t *mb_type_base;
141 uint32_t *mb_type; ///< mb_type_base + mb_width + 2, note: only used for decoding currently
142 #define MB_TYPE_INTRA4x4 0x0001
143 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
144 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
145 #define MB_TYPE_16x16 0x0008
146 #define MB_TYPE_16x8 0x0010
147 #define MB_TYPE_8x16 0x0020
148 #define MB_TYPE_8x8 0x0040
149 #define MB_TYPE_INTERLACED 0x0080
150 #define MB_TYPE_DIRECT2 0x0100 //FIXME
151 #define MB_TYPE_ACPRED 0x0200
152 #define MB_TYPE_GMC 0x0400 //FIXME mpeg4 specific
153 #define MB_TYPE_SKIP 0x0800
154 #define MB_TYPE_P0L0 0x1000
155 #define MB_TYPE_P1L0 0x2000
156 #define MB_TYPE_P0L1 0x4000
157 #define MB_TYPE_P1L1 0x8000
158 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
159 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
160 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
161 #define MB_TYPE_QUANT 0x00010000
162 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 pat, ...)
163
164 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
165 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
166 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
167 #define IS_INTRA(a) ((a)&7)
168 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
169 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
170 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
171 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
172 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
173 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
174 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
175 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
176 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
177 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
178 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
179 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
180 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
181 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
182 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
183 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
184 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
185 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note doesnt work if subMBs
186
187
188 int field_poc[2]; ///< h264 top/bottom POC
189 int poc; ///< h264 frame POC
190 int frame_num; ///< h264 frame_num
191 int pic_id; ///< h264 pic_num or long_term_pic_idx
192 int long_ref; ///< 1->long term reference 0->short term reference
193
194 int mb_var_sum; ///< sum of MB variance for current frame
195 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
196 uint16_t *mb_var; ///< Table for MB variances
197 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
198 uint8_t *mb_mean; ///< Table for MB luminance
199 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decission
200 int b_frame_score; /* */
201 } Picture;
202
203 typedef struct ParseContext{
204 uint8_t *buffer;
205 int index;
206 int last_index;
207 int buffer_size;
208 uint32_t state; ///< contains the last few bytes in MSB order
209 int frame_start_found;
210 int overread; ///< the number of bytes which where irreversibly read from the next frame
211 int overread_index; ///< the index into ParseContext.buffer of the overreaded bytes
212 } ParseContext;
213
214 struct MpegEncContext;
215
216 /**
217 * Motion estimation context.
218 */
219 typedef struct MotionEstContext{
220 int skip; ///< set if ME is skiped for the current MB
221 int co_located_mv[4][2]; ///< mv from last p frame for direct mode ME
222 int direct_basis_mv[4][2];
223 uint8_t *scratchpad; ///< data area for the me algo, so that the ME doesnt need to malloc/free
224 uint32_t *map; ///< map to avoid duplicate evaluations
225 uint32_t *score_map; ///< map to store the scores
226 int map_generation;
227 int pre_penalty_factor;
228 int penalty_factor;
229 int sub_penalty_factor;
230 int mb_penalty_factor;
231 int pre_pass; ///< = 1 for the pre pass
232 int dia_size;
233 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
234 int (*sub_motion_search)(struct MpegEncContext * s,
235 int *mx_ptr, int *my_ptr, int dmin,
236 int xmin, int ymin, int xmax, int ymax,
237 int pred_x, int pred_y, Picture *ref_picture,
238 int n, int size, uint8_t * const mv_penalty);
239 int (*motion_search[7])(struct MpegEncContext * s, int block,
240 int *mx_ptr, int *my_ptr,
241 int P[10][2], int pred_x, int pred_y,
242 int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
243 int ref_mv_scale, uint8_t * const mv_penalty);
244 int (*pre_motion_search)(struct MpegEncContext * s, int block,
245 int *mx_ptr, int *my_ptr,
246 int P[10][2], int pred_x, int pred_y,
247 int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
248 int ref_mv_scale, uint8_t * const mv_penalty);
249 int (*get_mb_score)(struct MpegEncContext * s, int mx, int my, int pred_x, int pred_y, Picture *ref_picture,
250 uint8_t * const mv_penalty);
251 }MotionEstContext;
252
253 /**
254 * MpegEncContext.
255 */
256 typedef struct MpegEncContext {
257 struct AVCodecContext *avctx;
258 /* the following parameters must be initialized before encoding */
259 int width, height;///< picture size. must be a multiple of 16
260 int gop_size;
261 int intra_only; ///< if true, only intra pictures are generated
262 int bit_rate; ///< wanted bit rate
263 int bit_rate_tolerance; ///< amount of +- bits (>0)
264 enum OutputFormat out_format; ///< output format
265 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
266
267 /* the following codec id fields are deprecated in favor of codec_id */
268 int h263_plus; ///< h263 plus headers
269 int h263_rv10; ///< use RV10 variation for H263
270 int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
271 int h263_intel; ///< use I263 intel h263 header
272 int h263_flv; ///< use flv h263 header
273
274 int codec_id; /* see CODEC_ID_xxx */
275 int fixed_qscale; ///< fixed qscale if non zero
276 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
277 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
278 int max_qdiff; ///< max qscale difference between frames
279 int encoding; ///< true if we are encoding (vs decoding)
280 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
281 int max_b_frames; ///< max number of b-frames for encoding
282 int b_frame_strategy;
283 int luma_elim_threshold;
284 int chroma_elim_threshold;
285 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
286 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
287 /* the following fields are managed internally by the encoder */
288
289 /** bit output */
290 PutBitContext pb;
291
292 /* sequence parameters */
293 int context_initialized;
294 int input_picture_number;
295 int picture_number;
296 int picture_in_gop_number; ///< 0-> first pic in gop, ...
297 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
298 int mb_width, mb_height; ///< number of MBs horizontally & vertically
299 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressng of left & top MBs withoutt sig11
300 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)
301 int mb_num; ///< number of MBs of a picture
302 int linesize; ///< line size, in bytes, may be different from width
303 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
304 Picture picture[MAX_PICTURE_COUNT]; ///< main picture buffer
305 Picture *input_picture[MAX_PICTURE_COUNT]; ///< next pictures on display order for encoding
306 Picture *reordered_input_picture[MAX_PICTURE_COUNT]; ///< pointer to the next pictures in codedorder for encoding
307
308 /**
309 * copy of the previous picture structure.
310 * note, linesize & data, might not match the previous picture (for field pictures)
311 */
312 Picture last_picture;
313
314 /**
315 * copy of the next picture structure.
316 * note, linesize & data, might not match the next picture (for field pictures)
317 */
318 Picture next_picture;
319
320 /**
321 * copy of the source picture structure for encoding.
322 * note, linesize & data, might not match the source picture (for field pictures)
323 */
324 Picture new_picture;
325
326 /**
327 * copy of the current picture structure.
328 * note, linesize & data, might not match the current picture (for field pictures)
329 */
330 Picture current_picture; ///< buffer to store the decompressed current picture
331
332 Picture *last_picture_ptr; ///< pointer to the previous picture.
333 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
334 Picture *current_picture_ptr; ///< pointer to the current picture
335 int last_dc[3]; ///< last DC values for MPEG1
336 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
337 int16_t dc_cache[4*5];
338 int y_dc_scale, c_dc_scale;
339 uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
340 uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
341 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
342 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
343 int ac_pred;
344 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
345 #define PREV_PICT_TYPES_BUFFER_SIZE 256
346 int mb_skiped; ///< MUST BE SET only during DECODING
347 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
348 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
349 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
350 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
351 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
352 uint8_t *allocated_edge_emu_buffer;
353 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
354
355 int qscale; ///< QP
356 int lambda; ///< lagrange multipler used in rate distortion
357 int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
358 int *lambda_table;
359 int adaptive_quant; ///< use adaptive quantization
360 int dquant; ///< qscale difference to prev qscale
361 int pict_type; ///< I_TYPE, P_TYPE, B_TYPE, ...
362 int last_pict_type;
363 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
364 int frame_rate_index;
365 /* motion compensation */
366 int unrestricted_mv; ///< mv can point outside of the coded picture
367 int h263_long_vectors; ///< use horrible h263v1 long vector mode
368 int decode; ///< if 0 then decoding will be skiped (for encoding b frames for example)
369
370 DSPContext dsp; ///< pointers for accelerated dsp fucntions
371 int f_code; ///< forward MV resolution
372 int b_code; ///< backward MV resolution for B Frames (mpeg4)
373 int16_t (*motion_val)[2];
374 int16_t (*p_mv_table_base)[2];
375 int16_t (*b_forw_mv_table_base)[2];
376 int16_t (*b_back_mv_table_base)[2];
377 int16_t (*b_bidir_forw_mv_table_base)[2];
378 int16_t (*b_bidir_back_mv_table_base)[2];
379 int16_t (*b_direct_mv_table_base)[2];
380 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
381 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
382 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
383 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
384 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
385 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
386 int me_method; ///< ME algorithm
387 int scene_change_score;
388 int mv_dir;
389 #define MV_DIR_BACKWARD 1
390 #define MV_DIR_FORWARD 2
391 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
392 int mv_type;
393 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
394 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
395 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
396 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
397 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
398 /**motion vectors for a macroblock
399 first coordinate : 0 = forward 1 = backward
400 second " : depend on type
401 third " : 0 = x, 1 = y
402 */
403 int mv[2][4][2];
404 int field_select[2][2];
405 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
406 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
407
408 MotionEstContext me;
409
410 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
411 for b-frames rounding mode is allways 0 */
412
413 int hurry_up; /**< when set to 1 during decoding, b frames will be skiped
414 when set to 2 idct/dequant will be skipped too */
415
416 /* macroblock layer */
417 int mb_x, mb_y;
418 int mb_skip_run;
419 int mb_intra;
420 uint8_t *mb_type; ///< Table for MB type FIXME remove and use picture->mb_type
421 #define MB_TYPE_INTRA 0x01
422 #define MB_TYPE_INTER 0x02
423 #define MB_TYPE_INTER4V 0x04
424 #define MB_TYPE_SKIPED 0x08
425 //#define MB_TYPE_GMC 0x10
426
427 #define MB_TYPE_DIRECT 0x10
428 #define MB_TYPE_FORWARD 0x20
429 #define MB_TYPE_BACKWARD 0x40
430 #define MB_TYPE_BIDIR 0x80
431
432 int block_index[6]; ///< index to current MB in block based arrays with edges
433 int block_wrap[6];
434 uint8_t *dest[3];
435
436 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
437
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 uint8_t *chroma_dc_vlc_length;
455 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
456
457 int coded_score[6];
458
459 /** precomputed matrix (combine qscale and DCT renorm) */
460 int __align8 q_intra_matrix[32][64];
461 int __align8 q_inter_matrix[32][64];
462 /** identical to the above but for MMX & these are not permutated */
463 uint16_t __align8 q_intra_matrix16[32][64];
464 uint16_t __align8 q_inter_matrix16[32][64];
465 uint16_t __align8 q_intra_matrix16_bias[32][64];
466 uint16_t __align8 q_inter_matrix16_bias[32][64];
467 int block_last_index[6]; ///< last non zero coefficient in block
468 /* scantables */
469 ScanTable __align8 intra_scantable;
470 ScanTable intra_h_scantable;
471 ScanTable intra_v_scantable;
472 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
473
474 void *opaque; ///< private data for the user
475
476 /* bit rate control */
477 int I_frame_bits; //FIXME used in mpeg12 ...
478 int64_t wanted_bits;
479 int64_t total_bits;
480 int frame_bits; ///< bits used for the current frame
481 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
482
483 /* statistics, used for 2-pass encoding */
484 int mv_bits;
485 int header_bits;
486 int i_tex_bits;
487 int p_tex_bits;
488 int i_count;
489 int f_count;
490 int b_count;
491 int skip_count;
492 int misc_bits; ///< cbp, mb_type
493 int last_bits; ///< temp var used for calculating the above vars
494
495 /* error concealment / resync */
496 int error_count;
497 uint8_t *error_status_table; ///< table of the error status of each MB
498 #define VP_START 1 ///< current MB is the first after a resync marker
499 #define AC_ERROR 2
500 #define DC_ERROR 4
501 #define MV_ERROR 8
502 #define AC_END 16
503 #define DC_END 32
504 #define MV_END 64
505 //FIXME some prefix?
506
507 int resync_mb_x; ///< x position of last resync marker
508 int resync_mb_y; ///< y position of last resync marker
509 GetBitContext last_resync_gb; ///< used to search for the next resync marker
510 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
511 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
512 int error_resilience;
513
514 ParseContext parse_context;
515
516 /* H.263 specific */
517 int gob_number;
518 int gob_index;
519
520 /* H.263+ specific */
521 int umvplus; ///< == H263+ && unrestricted_mv
522 int h263_aic; ///< Advanded INTRA Coding (AIC)
523 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
524
525 /* mpeg4 specific */
526 int time_increment_resolution;
527 int time_increment_bits; ///< number of bits to represent the fractional part of time
528 int last_time_base;
529 int time_base; ///< time in seconds of last I,P,S Frame
530 int64_t time; ///< time of current frame
531 int64_t last_non_b_time;
532 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
533 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
534 uint16_t pp_field_time;
535 uint16_t pb_field_time; ///< like above, just for interlaced
536 int shape;
537 int vol_sprite_usage;
538 int sprite_width;
539 int sprite_height;
540 int sprite_left;
541 int sprite_top;
542 int sprite_brightness_change;
543 int num_sprite_warping_points;
544 int real_sprite_warping_points;
545 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
546 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
547 int sprite_shift[2]; ///< sprite shift [isChroma]
548 int mcsel;
549 int quant_precision;
550 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
551 int scalability;
552 int hierachy_type;
553 int enhancement_type;
554 int new_pred;
555 int reduced_res_vop;
556 int aspect_ratio_info; //FIXME remove
557 int aspected_width; //FIXME remove
558 int aspected_height; //FIXME remove
559 int sprite_warping_accuracy;
560 int low_latency_sprite;
561 int data_partitioning; ///< data partitioning flag from header
562 int partitioned_frame; ///< is current frame partitioned
563 int rvlc; ///< reversible vlc
564 int resync_marker; ///< could this stream contain resync markers
565 int low_delay; ///< no reordering needed / has no b-frames
566 int vo_type;
567 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
568 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
569 PutBitContext tex_pb; ///< used for data partitioned VOPs
570 PutBitContext pb2; ///< used for data partitioned VOPs
571 #define PB_BUFFER_SIZE 1024*256
572 uint8_t *tex_pb_buffer;
573 uint8_t *pb2_buffer;
574 int mpeg_quant;
575 int16_t (*field_mv_table)[2][2]; ///< used for interlaced b frame decoding
576 int8_t (*field_select_table)[2]; ///< wtf, no really another table for interlaced b frames
577 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
578 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
579
580 /* divx specific, used to workaround (many) bugs in divx5 */
581 int divx_version;
582 int divx_build;
583 int divx_packed;
584 #define BITSTREAM_BUFFER_SIZE 1024*256
585 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
586 int bitstream_buffer_size;
587
588 int xvid_build;
589
590 /* lavc specific stuff, used to workaround bugs in libavcodec */
591 int ffmpeg_version;
592 int lavc_build;
593
594 /* RV10 specific */
595 int rv10_version; ///< RV10 version: 0 or 3
596 int rv10_first_dc_coded[3];
597
598 /* MJPEG specific */
599 struct MJpegContext *mjpeg_ctx;
600 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
601 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
602 int mjpeg_write_tables; ///< do we want to have quantisation- and huffmantables in the jpeg file ?
603 int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers
604
605 /* MSMPEG4 specific */
606 int mv_table_index;
607 int rl_table_index;
608 int rl_chroma_table_index;
609 int dc_table_index;
610 int use_skip_mb_code;
611 int slice_height; ///< in macroblocks
612 int first_slice_line; ///< used in mpeg4 too to handle resync markers
613 int flipflop_rounding;
614 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
615 int per_mb_rl_table;
616 int esc3_level_length;
617 int esc3_run_length;
618 /** [mb_intra][isChroma][level][run][last] */
619 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
620 int inter_intra_pred;
621 int mspel;
622
623 /* decompression specific */
624 GetBitContext gb;
625
626 /* Mpeg1 specific */
627 int fake_picture_number; ///< picture number at the bitstream frame rate
628 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
629 int last_mv_dir; ///< last mv_dir, used for b frame encoding
630 int broken_link; ///< no_output_of_prior_pics_flag
631
632 /* MPEG2 specific - I wish I had not to support this mess. */
633 int progressive_sequence;
634 int mpeg_f_code[2][2];
635 int picture_structure;
636 /* picture type */
637 #define PICT_TOP_FIELD 1
638 #define PICT_BOTTOM_FIELD 2
639 #define PICT_FRAME 3
640
641 int intra_dc_precision;
642 int frame_pred_frame_dct;
643 int top_field_first;
644 int concealment_motion_vectors;
645 int q_scale_type;
646 int intra_vlc_format;
647 int alternate_scan;
648 int repeat_first_field;
649 int chroma_420_type;
650 int progressive_frame;
651 int full_pel[2];
652 int interlaced_dct;
653 int first_slice;
654 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
655
656 /* RTP specific */
657 /* These are explained on avcodec.h */
658 int rtp_mode;
659 int rtp_payload_size;
660 void (*rtp_callback)(void *data, int size, int packet_number);
661 uint8_t *ptr_lastgob;
662
663 DCTELEM (*block)[64]; ///< points to one of the following blocks
664 DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
665 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
666 #define SLICE_OK 0
667 #define SLICE_ERROR -1
668 #define SLICE_END -2 ///<end marker found
669 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
670
671 void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
672 DCTELEM *block/*align 16*/, int n, int qscale);
673 void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
674 DCTELEM *block/*align 16*/, int n, int qscale);
675 void (*dct_unquantize_h263)(struct MpegEncContext *s,
676 DCTELEM *block/*align 16*/, int n, int qscale);
677 void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
678 DCTELEM *block/*align 16*/, int n, int qscale);
679 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
680 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
681 } MpegEncContext;
682
683
684 int DCT_common_init(MpegEncContext *s);
685 int MPV_common_init(MpegEncContext *s);
686 void MPV_common_end(MpegEncContext *s);
687 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
688 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
689 void MPV_frame_end(MpegEncContext *s);
690 int MPV_encode_init(AVCodecContext *avctx);
691 int MPV_encode_end(AVCodecContext *avctx);
692 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
693 #ifdef HAVE_MMX
694 void MPV_common_init_mmx(MpegEncContext *s);
695 #endif
696 #ifdef ARCH_ALPHA
697 void MPV_common_init_axp(MpegEncContext *s);
698 #endif
699 #ifdef HAVE_MLIB
700 void MPV_common_init_mlib(MpegEncContext *s);
701 #endif
702 #ifdef HAVE_MMI
703 void MPV_common_init_mmi(MpegEncContext *s);
704 #endif
705 #ifdef ARCH_ARMV4L
706 void MPV_common_init_armv4l(MpegEncContext *s);
707 #endif
708 #ifdef ARCH_POWERPC
709 void MPV_common_init_ppc(MpegEncContext *s);
710 #endif
711 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
712 void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
713 void ff_clean_intra_table_entries(MpegEncContext *s);
714 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
715 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
716 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
717 int src_x, int src_y, int w, int h);
718 #define END_NOT_FOUND -100
719 int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);
720 void ff_mpeg_flush(AVCodecContext *avctx);
721 void ff_print_debug_info(MpegEncContext *s, Picture *pict);
722 void ff_write_quant_matrix(PutBitContext *pb, int16_t *matrix);
723
724 void ff_er_frame_start(MpegEncContext *s);
725 void ff_er_frame_end(MpegEncContext *s);
726 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
727
728
729 extern enum PixelFormat ff_yuv420p_list[2];
730
731 void ff_init_block_index(MpegEncContext *s);
732
733 static inline void ff_update_block_index(MpegEncContext *s){
734 s->block_index[0]+=2;
735 s->block_index[1]+=2;
736 s->block_index[2]+=2;
737 s->block_index[3]+=2;
738 s->block_index[4]++;
739 s->block_index[5]++;
740 s->dest[0]+= 16;
741 s->dest[1]+= 8;
742 s->dest[2]+= 8;
743 }
744
745 static inline int get_bits_diff(MpegEncContext *s){
746 const int bits= get_bit_count(&s->pb);
747 const int last= s->last_bits;
748
749 s->last_bits = bits;
750
751 return bits - last;
752 }
753
754 /* motion_est.c */
755 void ff_estimate_p_frame_motion(MpegEncContext * s,
756 int mb_x, int mb_y);
757 void ff_estimate_b_frame_motion(MpegEncContext * s,
758 int mb_x, int mb_y);
759 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
760 void ff_fix_long_p_mvs(MpegEncContext * s);
761 void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
762 void ff_init_me(MpegEncContext *s);
763 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
764
765
766 /* mpeg12.c */
767 extern const int16_t ff_mpeg1_default_intra_matrix[64];
768 extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
769 extern uint8_t ff_mpeg1_dc_scale_table[128];
770
771 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
772 void mpeg1_encode_mb(MpegEncContext *s,
773 DCTELEM block[6][64],
774 int motion_x, int motion_y);
775 void ff_mpeg1_encode_init(MpegEncContext *s);
776 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
777 void ff_mpeg1_clean_buffers(MpegEncContext *s);
778
779
780 /** RLTable. */
781 typedef struct RLTable {
782 int n; ///< number of entries of table_vlc minus 1
783 int last; ///< number of values for last = 0
784 const uint16_t (*table_vlc)[2];
785 const int8_t *table_run;
786 const int8_t *table_level;
787 uint8_t *index_run[2]; ///< encoding only
788 int8_t *max_level[2]; ///< encoding & decoding
789 int8_t *max_run[2]; ///< encoding & decoding
790 VLC vlc; ///< decoding only deprected FIXME remove
791 RL_VLC_ELEM *rl_vlc[32]; ///< decoding only
792 } RLTable;
793
794 void init_rl(RLTable *rl);
795 void init_vlc_rl(RLTable *rl);
796
797 static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
798 {
799 int index;
800 index = rl->index_run[last][run];
801 if (index >= rl->n)
802 return rl->n;
803 if (level > rl->max_level[last][run])
804 return rl->n;
805 return index + level - 1;
806 }
807
808 extern uint8_t ff_mpeg4_y_dc_scale_table[32];
809 extern uint8_t ff_mpeg4_c_dc_scale_table[32];
810 extern const int16_t ff_mpeg4_default_intra_matrix[64];
811 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
812 int ff_h263_decode_init(AVCodecContext *avctx);
813 int ff_h263_decode_frame(AVCodecContext *avctx,
814 void *data, int *data_size,
815 uint8_t *buf, int buf_size);
816 int ff_h263_decode_end(AVCodecContext *avctx);
817 void h263_encode_mb(MpegEncContext *s,
818 DCTELEM block[6][64],
819 int motion_x, int motion_y);
820 void mpeg4_encode_mb(MpegEncContext *s,
821 DCTELEM block[6][64],
822 int motion_x, int motion_y);
823 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
824 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
825 int h263_encode_gob_header(MpegEncContext * s, int mb_line);
826 int16_t *h263_pred_motion(MpegEncContext * s, int block,
827 int *px, int *py);
828 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
829 int dir);
830 void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
831 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
832 void h263_encode_init(MpegEncContext *s);
833 void h263_decode_init_vlc(MpegEncContext *s);
834 int h263_decode_picture_header(MpegEncContext *s);
835 int ff_h263_decode_gob_header(MpegEncContext *s);
836 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
837 void ff_h263_update_motion_val(MpegEncContext * s);
838
839
840 int intel_h263_decode_picture_header(MpegEncContext *s);
841 int flv_h263_decode_picture_header(MpegEncContext *s);
842 int ff_h263_decode_mb(MpegEncContext *s,
843 DCTELEM block[6][64]);
844 int h263_get_picture_format(int width, int height);
845 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
846 void ff_mpeg4_clean_buffers(MpegEncContext *s);
847 void ff_mpeg4_stuffing(PutBitContext * pbc);
848 void ff_mpeg4_init_partitions(MpegEncContext *s);
849 void ff_mpeg4_merge_partitions(MpegEncContext *s);
850 void ff_clean_mpeg4_qscales(MpegEncContext *s);
851 void ff_clean_h263_qscales(MpegEncContext *s);
852 int ff_mpeg4_decode_partitions(MpegEncContext *s);
853 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
854 int ff_h263_resync(MpegEncContext *s);
855 int ff_h263_get_gob_height(MpegEncContext *s);
856 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
857 inline int ff_h263_round_chroma(int x);
858
859
860 /* rv10.c */
861 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
862 int rv_decode_dc(MpegEncContext *s, int n);
863
864
865 /* msmpeg4.c */
866 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
867 void msmpeg4_encode_ext_header(MpegEncContext * s);
868 void msmpeg4_encode_mb(MpegEncContext * s,
869 DCTELEM block[6][64],
870 int motion_x, int motion_y);
871 int msmpeg4_decode_picture_header(MpegEncContext * s);
872 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
873 int ff_msmpeg4_decode_init(MpegEncContext *s);
874 void ff_msmpeg4_encode_init(MpegEncContext *s);
875 int ff_wmv2_decode_picture_header(MpegEncContext * s);
876 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
877 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
878 void ff_mspel_motion(MpegEncContext *s,
879 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
880 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
881 int motion_x, int motion_y, int h);
882 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
883 void ff_wmv2_encode_mb(MpegEncContext * s,
884 DCTELEM block[6][64],
885 int motion_x, int motion_y);
886
887 /* mjpeg.c */
888 int mjpeg_init(MpegEncContext *s);
889 void mjpeg_close(MpegEncContext *s);
890 void mjpeg_encode_mb(MpegEncContext *s,
891 DCTELEM block[6][64]);
892 void mjpeg_picture_header(MpegEncContext *s);
893 void mjpeg_picture_trailer(MpegEncContext *s);
894
895
896 /* rate control */
897 int ff_rate_control_init(MpegEncContext *s);
898 float ff_rate_estimate_qscale(MpegEncContext *s);
899 void ff_write_pass1_stats(MpegEncContext *s);
900 void ff_rate_control_uninit(MpegEncContext *s);
901 double ff_eval(char *s, double *const_value, const char **const_name,
902 double (**func1)(void *, double), const char **func1_name,
903 double (**func2)(void *, double, double), char **func2_name,
904 void *opaque);
905
906
907 #endif /* AVCODEC_MPEGVIDEO_H */