move ff_copy_bits to bitstream.c
[libav.git] / libavcodec / mpegvideo.h
1 /*
2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23 /**
24 * @file mpegvideo.h
25 * mpegvideo header.
26 */
27
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
30
31 #include "dsputil.h"
32 #include "bitstream.h"
33 #include "ratecontrol.h"
34 #include "parser.h"
35
36 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
37
38 enum OutputFormat {
39 FMT_MPEG1,
40 FMT_H261,
41 FMT_H263,
42 FMT_MJPEG,
43 FMT_H264,
44 };
45
46 #define EDGE_WIDTH 16
47
48 #define MPEG_BUF_SIZE (16 * 1024)
49
50 #define QMAT_SHIFT_MMX 16
51 #define QMAT_SHIFT 22
52
53 #define MAX_FCODE 7
54 #define MAX_MV 2048
55
56 #define MAX_THREADS 8
57
58 #define MAX_PICTURE_COUNT 32
59
60 #define ME_MAP_SIZE 64
61 #define ME_MAP_SHIFT 3
62 #define ME_MAP_MV_BITS 11
63
64 /* run length table */
65 #define MAX_RUN 64
66 #define MAX_LEVEL 64
67
68 #define I_TYPE FF_I_TYPE ///< Intra
69 #define P_TYPE FF_P_TYPE ///< Predicted
70 #define B_TYPE FF_B_TYPE ///< Bi-dir predicted
71 #define S_TYPE FF_S_TYPE ///< S(GMC)-VOP MPEG4
72 #define SI_TYPE FF_SI_TYPE ///< Switching Intra
73 #define SP_TYPE FF_SP_TYPE ///< Switching Predicted
74
75 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
76
77 #define INPLACE_OFFSET 16
78
79 /* Start codes. */
80 #define SEQ_END_CODE 0x000001b7
81 #define SEQ_START_CODE 0x000001b3
82 #define GOP_START_CODE 0x000001b8
83 #define PICTURE_START_CODE 0x00000100
84 #define SLICE_MIN_START_CODE 0x00000101
85 #define SLICE_MAX_START_CODE 0x000001af
86 #define EXT_START_CODE 0x000001b5
87 #define USER_START_CODE 0x000001b2
88
89 /**
90 * Scantable.
91 */
92 typedef struct ScanTable{
93 const uint8_t *scantable;
94 uint8_t permutated[64];
95 uint8_t raster_end[64];
96 #ifdef ARCH_POWERPC
97 /** Used by dct_quantise_alitvec to find last-non-zero */
98 DECLARE_ALIGNED_8(uint8_t, inverse[64]);
99 #endif
100 } ScanTable;
101
102 /**
103 * Picture.
104 */
105 typedef struct Picture{
106 FF_COMMON_FRAME
107
108 /**
109 * halfpel luma planes.
110 */
111 uint8_t *interpolated[3];
112 int16_t (*motion_val_base[2])[2];
113 uint32_t *mb_type_base;
114 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if theres just one type
115 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
116 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
117 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
118 #define IS_INTRA(a) ((a)&7)
119 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
120 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
121 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
122 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
123 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
124 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
125 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
126 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
127 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
128 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
129 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
130 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
131 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
132 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
133 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
134 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
135 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
136 #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
137 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
138
139 int field_poc[2]; ///< h264 top/bottom POC
140 int poc; ///< h264 frame POC
141 int frame_num; ///< h264 frame_num
142 int pic_id; ///< h264 pic_num or long_term_pic_idx
143 int long_ref; ///< 1->long term reference 0->short term reference
144 int ref_poc[2][16]; ///< h264 POCs of the frames used as reference
145 int ref_count[2]; ///< number of entries in ref_poc
146
147 int mb_var_sum; ///< sum of MB variance for current frame
148 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
149 uint16_t *mb_var; ///< Table for MB variances
150 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
151 uint8_t *mb_mean; ///< Table for MB luminance
152 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
153 int b_frame_score; /* */
154 } Picture;
155
156 struct MpegEncContext;
157
158 /**
159 * Motion estimation context.
160 */
161 typedef struct MotionEstContext{
162 AVCodecContext *avctx;
163 int skip; ///< set if ME is skipped for the current MB
164 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
165 int direct_basis_mv[4][2];
166 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
167 uint8_t *best_mb;
168 uint8_t *temp_mb[2];
169 uint8_t *temp;
170 int best_bits;
171 uint32_t *map; ///< map to avoid duplicate evaluations
172 uint32_t *score_map; ///< map to store the scores
173 int map_generation;
174 int pre_penalty_factor;
175 int penalty_factor; /*!< an estimate of the bits required to
176 code a given mv value, e.g. (1,0) takes
177 more bits than (0,0). We have to
178 estimate whether any reduction in
179 residual is worth the extra bits. */
180 int sub_penalty_factor;
181 int mb_penalty_factor;
182 int flags;
183 int sub_flags;
184 int mb_flags;
185 int pre_pass; ///< = 1 for the pre pass
186 int dia_size;
187 int xmin;
188 int xmax;
189 int ymin;
190 int ymax;
191 int pred_x;
192 int pred_y;
193 uint8_t *src[4][4];
194 uint8_t *ref[4][4];
195 int stride;
196 int uvstride;
197 /* temp variables for picture complexity calculation */
198 int mc_mb_var_sum_temp;
199 int mb_var_sum_temp;
200 int scene_change_score;
201 /* cmp, chroma_cmp;*/
202 op_pixels_func (*hpel_put)[4];
203 op_pixels_func (*hpel_avg)[4];
204 qpel_mc_func (*qpel_put)[16];
205 qpel_mc_func (*qpel_avg)[16];
206 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
207 uint8_t *current_mv_penalty;
208 int (*sub_motion_search)(struct MpegEncContext * s,
209 int *mx_ptr, int *my_ptr, int dmin,
210 int src_index, int ref_index,
211 int size, int h);
212 }MotionEstContext;
213
214 /**
215 * MpegEncContext.
216 */
217 typedef struct MpegEncContext {
218 struct AVCodecContext *avctx;
219 /* the following parameters must be initialized before encoding */
220 int width, height;///< picture size. must be a multiple of 16
221 int gop_size;
222 int intra_only; ///< if true, only intra pictures are generated
223 int bit_rate; ///< wanted bit rate
224 enum OutputFormat out_format; ///< output format
225 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
226
227 /* the following codec id fields are deprecated in favor of codec_id */
228 int h263_plus; ///< h263 plus headers
229 int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
230 int h263_flv; ///< use flv h263 header
231
232 enum CodecID codec_id; /* see CODEC_ID_xxx */
233 int fixed_qscale; ///< fixed qscale if non zero
234 int encoding; ///< true if we are encoding (vs decoding)
235 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
236 int flags2; ///< AVCodecContext.flags2
237 int max_b_frames; ///< max number of b-frames for encoding
238 int luma_elim_threshold;
239 int chroma_elim_threshold;
240 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
241 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
242 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
243 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
244 /* the following fields are managed internally by the encoder */
245
246 /** bit output */
247 PutBitContext pb;
248
249 /* sequence parameters */
250 int context_initialized;
251 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
252 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
253 int picture_number; //FIXME remove, unclear definition
254 int picture_in_gop_number; ///< 0-> first pic in gop, ...
255 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
256 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
257 int mb_width, mb_height; ///< number of MBs horizontally & vertically
258 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
259 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
260 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
261 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
262 int mb_num; ///< number of MBs of a picture
263 int linesize; ///< line size, in bytes, may be different from width
264 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
265 Picture *picture; ///< main picture buffer
266 Picture **input_picture; ///< next pictures on display order for encoding
267 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
268
269 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
270 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
271 struct MpegEncContext *thread_context[MAX_THREADS];
272
273 /**
274 * copy of the previous picture structure.
275 * note, linesize & data, might not match the previous picture (for field pictures)
276 */
277 Picture last_picture;
278
279 /**
280 * copy of the next picture structure.
281 * note, linesize & data, might not match the next picture (for field pictures)
282 */
283 Picture next_picture;
284
285 /**
286 * copy of the source picture structure for encoding.
287 * note, linesize & data, might not match the source picture (for field pictures)
288 */
289 Picture new_picture;
290
291 /**
292 * copy of the current picture structure.
293 * note, linesize & data, might not match the current picture (for field pictures)
294 */
295 Picture current_picture; ///< buffer to store the decompressed current picture
296
297 Picture *last_picture_ptr; ///< pointer to the previous picture.
298 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
299 Picture *current_picture_ptr; ///< pointer to the current picture
300 uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
301 int last_dc[3]; ///< last DC values for MPEG1
302 int16_t *dc_val_base;
303 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
304 int16_t dc_cache[4*5];
305 int y_dc_scale, c_dc_scale;
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 int ac_pred;
314 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
315 #define PREV_PICT_TYPES_BUFFER_SIZE 256
316 int mb_skipped; ///< MUST BE SET only during DECODING
317 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
318 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
319 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
320 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
321 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
322 uint8_t *allocated_edge_emu_buffer;
323 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
324 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
325 uint8_t *obmc_scratchpad;
326 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
327
328 int qscale; ///< QP
329 int chroma_qscale; ///< chroma QP
330 unsigned int lambda; ///< lagrange multipler used in rate distortion
331 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
332 int *lambda_table;
333 int adaptive_quant; ///< use adaptive quantization
334 int dquant; ///< qscale difference to prev qscale
335 int pict_type; ///< I_TYPE, P_TYPE, B_TYPE, ...
336 int last_pict_type; //FIXME removes
337 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
338 int dropable;
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
342
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)
347
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
370 int mv_dir;
371 #define MV_DIR_BACKWARD 1
372 #define MV_DIR_FORWARD 2
373 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
374 int mv_type;
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
384 */
385 int mv[2][4][2];
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
390
391 MotionEstContext me;
392
393 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
394 for b-frames rounding mode is always 0 */
395
396 int hurry_up; /**< when set to 1 during decoding, b frames will be skipped
397 when set to 2 idct/dequant will be skipped too */
398
399 /* macroblock layer */
400 int mb_x, mb_y;
401 int mb_skip_run;
402 int mb_intra;
403 uint16_t *mb_type; ///< Table for candidate MB types for encoding
404 #define CANDIDATE_MB_TYPE_INTRA 0x01
405 #define CANDIDATE_MB_TYPE_INTER 0x02
406 #define CANDIDATE_MB_TYPE_INTER4V 0x04
407 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
408 //#define MB_TYPE_GMC 0x10
409
410 #define CANDIDATE_MB_TYPE_DIRECT 0x10
411 #define CANDIDATE_MB_TYPE_FORWARD 0x20
412 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
413 #define CANDIDATE_MB_TYPE_BIDIR 0x80
414
415 #define CANDIDATE_MB_TYPE_INTER_I 0x100
416 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
417 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
418 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
419
420 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
421
422 int block_index[6]; ///< index to current MB in block based arrays with edges
423 int block_wrap[6];
424 uint8_t *dest[3];
425
426 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
427
428 /** matrix transmitted in the bitstream */
429 uint16_t intra_matrix[64];
430 uint16_t chroma_intra_matrix[64];
431 uint16_t inter_matrix[64];
432 uint16_t chroma_inter_matrix[64];
433 #define QUANT_BIAS_SHIFT 8
434 int intra_quant_bias; ///< bias for the quantizer
435 int inter_quant_bias; ///< bias for the quantizer
436 int min_qcoeff; ///< minimum encodable coefficient
437 int max_qcoeff; ///< maximum encodable coefficient
438 int ac_esc_length; ///< num of bits needed to encode the longest esc
439 uint8_t *intra_ac_vlc_length;
440 uint8_t *intra_ac_vlc_last_length;
441 uint8_t *inter_ac_vlc_length;
442 uint8_t *inter_ac_vlc_last_length;
443 uint8_t *luma_dc_vlc_length;
444 uint8_t *chroma_dc_vlc_length;
445 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
446
447 int coded_score[8];
448
449 /** precomputed matrix (combine qscale and DCT renorm) */
450 int (*q_intra_matrix)[64];
451 int (*q_inter_matrix)[64];
452 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
453 uint16_t (*q_intra_matrix16)[2][64];
454 uint16_t (*q_inter_matrix16)[2][64];
455 int block_last_index[12]; ///< last non zero coefficient in block
456 /* scantables */
457 DECLARE_ALIGNED_8(ScanTable, intra_scantable);
458 ScanTable intra_h_scantable;
459 ScanTable intra_v_scantable;
460 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
461
462 /* noise reduction */
463 int (*dct_error_sum)[64];
464 int dct_count[2];
465 uint16_t (*dct_offset)[64];
466
467 void *opaque; ///< private data for the user
468
469 /* bit rate control */
470 int64_t wanted_bits;
471 int64_t total_bits;
472 int frame_bits; ///< bits used for the current frame
473 int next_lambda; ///< next lambda used for retrying to encode a frame
474 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
475
476 /* statistics, used for 2-pass encoding */
477 int mv_bits;
478 int header_bits;
479 int i_tex_bits;
480 int p_tex_bits;
481 int i_count;
482 int f_count;
483 int b_count;
484 int skip_count;
485 int misc_bits; ///< cbp, mb_type
486 int last_bits; ///< temp var used for calculating the above vars
487
488 /* error concealment / resync */
489 int error_count;
490 uint8_t *error_status_table; ///< table of the error status of each MB
491 #define VP_START 1 ///< current MB is the first after a resync marker
492 #define AC_ERROR 2
493 #define DC_ERROR 4
494 #define MV_ERROR 8
495 #define AC_END 16
496 #define DC_END 32
497 #define MV_END 64
498 //FIXME some prefix?
499
500 int resync_mb_x; ///< x position of last resync marker
501 int resync_mb_y; ///< y position of last resync marker
502 GetBitContext last_resync_gb; ///< used to search for the next resync marker
503 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
504 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
505 int error_resilience;
506
507 ParseContext parse_context;
508
509 /* H.263 specific */
510 int gob_index;
511 int obmc; ///< overlapped block motion compensation
512
513 /* H.263+ specific */
514 int umvplus; ///< == H263+ && unrestricted_mv
515 int h263_aic; ///< Advanded INTRA Coding (AIC)
516 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
517 int h263_slice_structured;
518 int alt_inter_vlc; ///< alternative inter vlc
519 int modified_quant;
520 int loop_filter;
521 int custom_pcf;
522
523 /* mpeg4 specific */
524 int time_increment_bits; ///< number of bits to represent the fractional part of time
525 int last_time_base;
526 int time_base; ///< time in seconds of last I,P,S Frame
527 int64_t time; ///< time of current frame
528 int64_t last_non_b_time;
529 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
530 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
531 uint16_t pp_field_time;
532 uint16_t pb_field_time; ///< like above, just for interlaced
533 int shape;
534 int vol_sprite_usage;
535 int sprite_width;
536 int sprite_height;
537 int sprite_left;
538 int sprite_top;
539 int sprite_brightness_change;
540 int num_sprite_warping_points;
541 int real_sprite_warping_points;
542 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
543 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
544 int sprite_shift[2]; ///< sprite shift [isChroma]
545 int mcsel;
546 int quant_precision;
547 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
548 int scalability;
549 int hierachy_type;
550 int enhancement_type;
551 int new_pred;
552 int reduced_res_vop;
553 int aspect_ratio_info; //FIXME remove
554 int sprite_warping_accuracy;
555 int low_latency_sprite;
556 int data_partitioning; ///< data partitioning flag from header
557 int partitioned_frame; ///< is current frame partitioned
558 int rvlc; ///< reversible vlc
559 int resync_marker; ///< could this stream contain resync markers
560 int low_delay; ///< no reordering needed / has no b-frames
561 int vo_type;
562 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
563 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
564 int use_intra_dc_vlc;
565 PutBitContext tex_pb; ///< used for data partitioned VOPs
566 PutBitContext pb2; ///< used for data partitioned VOPs
567 int mpeg_quant;
568 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
569 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
570
571 /* divx specific, used to workaround (many) bugs in divx5 */
572 int divx_version;
573 int divx_build;
574 int divx_packed;
575 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
576 int bitstream_buffer_size;
577 unsigned int allocated_bitstream_buffer_size;
578
579 int xvid_build;
580
581 /* lavc specific stuff, used to workaround bugs in libavcodec */
582 int lavc_build;
583
584 /* RV10 specific */
585 int rv10_version; ///< RV10 version: 0 or 3
586 int rv10_first_dc_coded[3];
587
588 /* MJPEG specific */
589 struct MJpegContext *mjpeg_ctx;
590 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
591 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
592
593 /* MSMPEG4 specific */
594 int mv_table_index;
595 int rl_table_index;
596 int rl_chroma_table_index;
597 int dc_table_index;
598 int use_skip_mb_code;
599 int slice_height; ///< in macroblocks
600 int first_slice_line; ///< used in mpeg4 too to handle resync markers
601 int flipflop_rounding;
602 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
603 int per_mb_rl_table;
604 int esc3_level_length;
605 int esc3_run_length;
606 /** [mb_intra][isChroma][level][run][last] */
607 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
608 int inter_intra_pred;
609 int mspel;
610
611 /* decompression specific */
612 GetBitContext gb;
613
614 /* Mpeg1 specific */
615 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
616 int last_mv_dir; ///< last mv_dir, used for b frame encoding
617 int broken_link; ///< no_output_of_prior_pics_flag
618 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
619
620 /* MPEG2 specific - I wish I had not to support this mess. */
621 int progressive_sequence;
622 int mpeg_f_code[2][2];
623 int picture_structure;
624 /* picture type */
625 #define PICT_TOP_FIELD 1
626 #define PICT_BOTTOM_FIELD 2
627 #define PICT_FRAME 3
628
629 int intra_dc_precision;
630 int frame_pred_frame_dct;
631 int top_field_first;
632 int concealment_motion_vectors;
633 int q_scale_type;
634 int intra_vlc_format;
635 int alternate_scan;
636 int repeat_first_field;
637 int chroma_420_type;
638 int chroma_format;
639 #define CHROMA_420 1
640 #define CHROMA_422 2
641 #define CHROMA_444 3
642 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
643 int chroma_y_shift;
644
645 int progressive_frame;
646 int full_pel[2];
647 int interlaced_dct;
648 int first_slice;
649 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
650
651 /* RTP specific */
652 int rtp_mode;
653
654 uint8_t *ptr_lastgob;
655 int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
656 short * pblocks[12];
657
658 DCTELEM (*block)[64]; ///< points to one of the following blocks
659 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
660 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
661 #define SLICE_OK 0
662 #define SLICE_ERROR -1
663 #define SLICE_END -2 ///<end marker found
664 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
665
666 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
667 DCTELEM *block/*align 16*/, int n, int qscale);
668 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
669 DCTELEM *block/*align 16*/, int n, int qscale);
670 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
671 DCTELEM *block/*align 16*/, int n, int qscale);
672 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
673 DCTELEM *block/*align 16*/, int n, int qscale);
674 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
675 DCTELEM *block/*align 16*/, int n, int qscale);
676 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
677 DCTELEM *block/*align 16*/, int n, int qscale);
678 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
679 DCTELEM *block/*align 16*/, int n, int qscale);
680 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
681 DCTELEM *block/*align 16*/, int n, int qscale);
682 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
683 DCTELEM *block/*align 16*/, int n, int qscale);
684 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
685 DCTELEM *block/*align 16*/, int n, int qscale);
686 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
687 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
688 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
689 } MpegEncContext;
690
691
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 #ifdef HAVE_MMX
702 void MPV_common_init_mmx(MpegEncContext *s);
703 #endif
704 #ifdef ARCH_ALPHA
705 void MPV_common_init_axp(MpegEncContext *s);
706 #endif
707 #ifdef HAVE_MLIB
708 void MPV_common_init_mlib(MpegEncContext *s);
709 #endif
710 #ifdef HAVE_MMI
711 void MPV_common_init_mmi(MpegEncContext *s);
712 #endif
713 #ifdef ARCH_ARMV4L
714 void MPV_common_init_armv4l(MpegEncContext *s);
715 #endif
716 #ifdef ARCH_POWERPC
717 void MPV_common_init_ppc(MpegEncContext *s);
718 #endif
719 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
720 void ff_clean_intra_table_entries(MpegEncContext *s);
721 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
722 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
723 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
724 int src_x, int src_y, int w, int h);
725 void ff_mpeg_flush(AVCodecContext *avctx);
726 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
727 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
728 int ff_find_unused_picture(MpegEncContext *s, int shared);
729 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
730 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
731 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
732
733 void ff_er_frame_start(MpegEncContext *s);
734 void ff_er_frame_end(MpegEncContext *s);
735 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
736
737
738 extern enum PixelFormat ff_yuv420p_list[2];
739
740 void ff_init_block_index(MpegEncContext *s);
741
742 static inline void ff_update_block_index(MpegEncContext *s){
743 const int block_size= 8>>s->avctx->lowres;
744
745 s->block_index[0]+=2;
746 s->block_index[1]+=2;
747 s->block_index[2]+=2;
748 s->block_index[3]+=2;
749 s->block_index[4]++;
750 s->block_index[5]++;
751 s->dest[0]+= 2*block_size;
752 s->dest[1]+= block_size;
753 s->dest[2]+= block_size;
754 }
755
756 static inline int get_bits_diff(MpegEncContext *s){
757 const int bits= put_bits_count(&s->pb);
758 const int last= s->last_bits;
759
760 s->last_bits = bits;
761
762 return bits - last;
763 }
764
765 /* motion_est.c */
766 void ff_estimate_p_frame_motion(MpegEncContext * s,
767 int mb_x, int mb_y);
768 void ff_estimate_b_frame_motion(MpegEncContext * s,
769 int mb_x, int mb_y);
770 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
771 void ff_fix_long_p_mvs(MpegEncContext * s);
772 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
773 int16_t (*mv_table)[2], int f_code, int type, int truncate);
774 void ff_init_me(MpegEncContext *s);
775 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
776 inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
777 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
778 int ref_mv_scale, int size, int h);
779 inline int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
780 int ref_index, int size, int h, int add_rate);
781
782 /* mpeg12.c */
783 extern const uint16_t ff_mpeg1_default_intra_matrix[64];
784 extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
785 extern const uint8_t ff_mpeg1_dc_scale_table[128];
786 extern const AVRational ff_frame_rate_tab[];
787
788 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
789 void mpeg1_encode_mb(MpegEncContext *s,
790 DCTELEM block[6][64],
791 int motion_x, int motion_y);
792 void ff_mpeg1_encode_init(MpegEncContext *s);
793 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
794 void ff_mpeg1_clean_buffers(MpegEncContext *s);
795 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
796
797 #include "rl.h"
798
799 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
800 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
801 extern const uint8_t ff_aic_dc_scale_table[32];
802 extern const int16_t ff_mpeg4_default_intra_matrix[64];
803 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
804 extern const uint8_t ff_h263_chroma_qscale_table[32];
805 extern const uint8_t ff_h263_loop_filter_strength[32];
806
807 /* h261.c */
808 void ff_h261_loop_filter(MpegEncContext *s);
809 void ff_h261_reorder_mb_index(MpegEncContext* s);
810 void ff_h261_encode_mb(MpegEncContext *s,
811 DCTELEM block[6][64],
812 int motion_x, int motion_y);
813 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
814 void ff_h261_encode_init(MpegEncContext *s);
815 int ff_h261_get_picture_format(int width, int height);
816
817
818 /* h263.c, h263dec.c */
819 int ff_h263_decode_init(AVCodecContext *avctx);
820 int ff_h263_decode_frame(AVCodecContext *avctx,
821 void *data, int *data_size,
822 uint8_t *buf, int buf_size);
823 int ff_h263_decode_end(AVCodecContext *avctx);
824 void h263_encode_mb(MpegEncContext *s,
825 DCTELEM block[6][64],
826 int motion_x, int motion_y);
827 void mpeg4_encode_mb(MpegEncContext *s,
828 DCTELEM block[6][64],
829 int motion_x, int motion_y);
830 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
831 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
832 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
833 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
834 int *px, int *py);
835 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
836 int dir);
837 void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
838 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
839 #ifdef CONFIG_ENCODERS
840 void h263_encode_init(MpegEncContext *s);
841 #else
842 static void h263_encode_init(MpegEncContext *s) {assert(0);}
843 #endif
844 void h263_decode_init_vlc(MpegEncContext *s);
845 int h263_decode_picture_header(MpegEncContext *s);
846 int ff_h263_decode_gob_header(MpegEncContext *s);
847 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
848 void ff_h263_update_motion_val(MpegEncContext * s);
849 void ff_h263_loop_filter(MpegEncContext * s);
850 void ff_set_qscale(MpegEncContext * s, int qscale);
851 int ff_h263_decode_mba(MpegEncContext *s);
852 void ff_h263_encode_mba(MpegEncContext *s);
853
854 int intel_h263_decode_picture_header(MpegEncContext *s);
855 int flv_h263_decode_picture_header(MpegEncContext *s);
856 int ff_h263_decode_mb(MpegEncContext *s,
857 DCTELEM block[6][64]);
858 int ff_mpeg4_decode_mb(MpegEncContext *s,
859 DCTELEM block[6][64]);
860 int h263_get_picture_format(int width, int height);
861 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
862 void ff_mpeg4_clean_buffers(MpegEncContext *s);
863 void ff_mpeg4_stuffing(PutBitContext * pbc);
864 void ff_mpeg4_init_partitions(MpegEncContext *s);
865 void ff_mpeg4_merge_partitions(MpegEncContext *s);
866 void ff_clean_mpeg4_qscales(MpegEncContext *s);
867 void ff_clean_h263_qscales(MpegEncContext *s);
868 int ff_mpeg4_decode_partitions(MpegEncContext *s);
869 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
870 int ff_h263_resync(MpegEncContext *s);
871 int ff_h263_get_gob_height(MpegEncContext *s);
872 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
873 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
874 int ff_h263_round_chroma(int x);
875 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
876
877
878 /* rv10.c */
879 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
880 int rv_decode_dc(MpegEncContext *s, int n);
881 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
882
883
884 /* msmpeg4.c */
885 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
886 void msmpeg4_encode_ext_header(MpegEncContext * s);
887 void msmpeg4_encode_mb(MpegEncContext * s,
888 DCTELEM block[6][64],
889 int motion_x, int motion_y);
890 int msmpeg4_decode_picture_header(MpegEncContext * s);
891 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
892 int ff_msmpeg4_decode_init(MpegEncContext *s);
893 void ff_msmpeg4_encode_init(MpegEncContext *s);
894 int ff_wmv2_decode_picture_header(MpegEncContext * s);
895 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
896 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
897 void ff_mspel_motion(MpegEncContext *s,
898 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
899 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
900 int motion_x, int motion_y, int h);
901 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
902 void ff_wmv2_encode_mb(MpegEncContext * s,
903 DCTELEM block[6][64],
904 int motion_x, int motion_y);
905
906 #endif /* AVCODEC_MPEGVIDEO_H */
907