f791af2543466e8b2e5e03310c6d358ba901133f
[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 libavcodec/mpegvideo.h
25 * mpegvideo header.
26 */
27
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
30
31 #include "dsputil.h"
32 #include "get_bits.h"
33 #include "put_bits.h"
34 #include "ratecontrol.h"
35 #include "parser.h"
36 #include "mpeg12data.h"
37 #include "rl.h"
38
39 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
40
41 enum OutputFormat {
42 FMT_MPEG1,
43 FMT_H261,
44 FMT_H263,
45 FMT_MJPEG,
46 FMT_H264,
47 };
48
49 #define MPEG_BUF_SIZE (16 * 1024)
50
51 #define QMAT_SHIFT_MMX 16
52 #define QMAT_SHIFT 22
53
54 #define MAX_FCODE 7
55 #define MAX_MV 2048
56
57 #define MAX_THREADS 16
58
59 #define MAX_PICTURE_COUNT 32
60
61 #define ME_MAP_SIZE 64
62 #define ME_MAP_SHIFT 3
63 #define ME_MAP_MV_BITS 11
64
65 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
66
67 #define INPLACE_OFFSET 16
68
69 /* Start codes. */
70 #define SEQ_END_CODE 0x000001b7
71 #define SEQ_START_CODE 0x000001b3
72 #define GOP_START_CODE 0x000001b8
73 #define PICTURE_START_CODE 0x00000100
74 #define SLICE_MIN_START_CODE 0x00000101
75 #define SLICE_MAX_START_CODE 0x000001af
76 #define EXT_START_CODE 0x000001b5
77 #define USER_START_CODE 0x000001b2
78
79 /**
80 * Picture.
81 */
82 typedef struct Picture{
83 FF_COMMON_FRAME
84
85 /**
86 * halfpel luma planes.
87 */
88 uint8_t *interpolated[3];
89 int16_t (*motion_val_base[2])[2];
90 uint32_t *mb_type_base;
91 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
92 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
93 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
94 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
95 #define IS_INTRA(a) ((a)&7)
96 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
97 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
98 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
99 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
100 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
101 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
102 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
103 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
104 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
105 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
106 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
107 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
108 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
109 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
110 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
111 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
112 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
113 #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
114 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
115
116 int field_poc[2]; ///< h264 top/bottom POC
117 int poc; ///< h264 frame POC
118 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
119 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
120 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
121 pic_num & max_pic_num; long -> long_pic_num) */
122 int long_ref; ///< 1->long term reference 0->short term reference
123 int ref_poc[2][2][16]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
124 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
125 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
126
127 int mb_var_sum; ///< sum of MB variance for current frame
128 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
129 uint16_t *mb_var; ///< Table for MB variances
130 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
131 uint8_t *mb_mean; ///< Table for MB luminance
132 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
133 int b_frame_score; /* */
134 } Picture;
135
136 struct MpegEncContext;
137
138 /**
139 * Motion estimation context.
140 */
141 typedef struct MotionEstContext{
142 AVCodecContext *avctx;
143 int skip; ///< set if ME is skipped for the current MB
144 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
145 int direct_basis_mv[4][2];
146 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
147 uint8_t *best_mb;
148 uint8_t *temp_mb[2];
149 uint8_t *temp;
150 int best_bits;
151 uint32_t *map; ///< map to avoid duplicate evaluations
152 uint32_t *score_map; ///< map to store the scores
153 int map_generation;
154 int pre_penalty_factor;
155 int penalty_factor; /*!< an estimate of the bits required to
156 code a given mv value, e.g. (1,0) takes
157 more bits than (0,0). We have to
158 estimate whether any reduction in
159 residual is worth the extra bits. */
160 int sub_penalty_factor;
161 int mb_penalty_factor;
162 int flags;
163 int sub_flags;
164 int mb_flags;
165 int pre_pass; ///< = 1 for the pre pass
166 int dia_size;
167 int xmin;
168 int xmax;
169 int ymin;
170 int ymax;
171 int pred_x;
172 int pred_y;
173 uint8_t *src[4][4];
174 uint8_t *ref[4][4];
175 int stride;
176 int uvstride;
177 /* temp variables for picture complexity calculation */
178 int mc_mb_var_sum_temp;
179 int mb_var_sum_temp;
180 int scene_change_score;
181 /* cmp, chroma_cmp;*/
182 op_pixels_func (*hpel_put)[4];
183 op_pixels_func (*hpel_avg)[4];
184 qpel_mc_func (*qpel_put)[16];
185 qpel_mc_func (*qpel_avg)[16];
186 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
187 uint8_t *current_mv_penalty;
188 int (*sub_motion_search)(struct MpegEncContext * s,
189 int *mx_ptr, int *my_ptr, int dmin,
190 int src_index, int ref_index,
191 int size, int h);
192 }MotionEstContext;
193
194 /**
195 * MpegEncContext.
196 */
197 typedef struct MpegEncContext {
198 struct AVCodecContext *avctx;
199 /* the following parameters must be initialized before encoding */
200 int width, height;///< picture size. must be a multiple of 16
201 int gop_size;
202 int intra_only; ///< if true, only intra pictures are generated
203 int bit_rate; ///< wanted bit rate
204 enum OutputFormat out_format; ///< output format
205 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
206 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
207
208 /* the following codec id fields are deprecated in favor of codec_id */
209 int h263_plus; ///< h263 plus headers
210 int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
211 int h263_flv; ///< use flv h263 header
212
213 enum CodecID codec_id; /* see CODEC_ID_xxx */
214 int fixed_qscale; ///< fixed qscale if non zero
215 int encoding; ///< true if we are encoding (vs decoding)
216 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
217 int flags2; ///< AVCodecContext.flags2
218 int max_b_frames; ///< max number of b-frames for encoding
219 int luma_elim_threshold;
220 int chroma_elim_threshold;
221 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
222 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
223 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
224 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
225 /* the following fields are managed internally by the encoder */
226
227 /** bit output */
228 PutBitContext pb;
229
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 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
238 int mb_width, mb_height; ///< number of MBs horizontally & vertically
239 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
240 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
241 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
242 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
243 int mb_num; ///< number of MBs of a picture
244 int linesize; ///< line size, in bytes, may be different from width
245 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
246 Picture *picture; ///< main picture buffer
247 Picture **input_picture; ///< next pictures on display order for encoding
248 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
249
250 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
251 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
252 struct MpegEncContext *thread_context[MAX_THREADS];
253
254 /**
255 * copy of the previous picture structure.
256 * note, linesize & data, might not match the previous picture (for field pictures)
257 */
258 Picture last_picture;
259
260 /**
261 * copy of the next picture structure.
262 * note, linesize & data, might not match the next picture (for field pictures)
263 */
264 Picture next_picture;
265
266 /**
267 * copy of the source picture structure for encoding.
268 * note, linesize & data, might not match the source picture (for field pictures)
269 */
270 Picture new_picture;
271
272 /**
273 * copy of the current picture structure.
274 * note, linesize & data, might not match the current picture (for field pictures)
275 */
276 Picture current_picture; ///< buffer to store the decompressed current picture
277
278 Picture *last_picture_ptr; ///< pointer to the previous picture.
279 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
280 Picture *current_picture_ptr; ///< pointer to the current picture
281 uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
282 int last_dc[3]; ///< last DC values for MPEG1
283 int16_t *dc_val_base;
284 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
285 int16_t dc_cache[4*5];
286 int y_dc_scale, c_dc_scale;
287 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
288 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
289 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
290 uint8_t *coded_block_base;
291 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
292 int16_t (*ac_val_base)[16];
293 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
294 int ac_pred;
295 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
296 #define PREV_PICT_TYPES_BUFFER_SIZE 256
297 int mb_skipped; ///< MUST BE SET only during DECODING
298 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
299 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
300 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
301 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
302 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
303 uint8_t *allocated_edge_emu_buffer;
304 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
305 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
306 uint8_t *obmc_scratchpad;
307 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
308
309 int qscale; ///< QP
310 int chroma_qscale; ///< chroma QP
311 unsigned int lambda; ///< lagrange multipler used in rate distortion
312 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
313 int *lambda_table;
314 int adaptive_quant; ///< use adaptive quantization
315 int dquant; ///< qscale difference to prev qscale
316 int closed_gop; ///< MPEG1/2 GOP is closed
317 int pict_type; ///< FF_I_TYPE, FF_P_TYPE, FF_B_TYPE, ...
318 int last_pict_type; //FIXME removes
319 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
320 int dropable;
321 int frame_rate_index;
322 int last_lambda_for[5]; ///< last lambda for a specific pict type
323 int skipdct; ///< skip dct and code zero residual
324
325 /* motion compensation */
326 int unrestricted_mv; ///< mv can point outside of the coded picture
327 int h263_long_vectors; ///< use horrible h263v1 long vector mode
328 int decode; ///< if 0 then decoding will be skipped (for encoding b frames for example)
329
330 DSPContext dsp; ///< pointers for accelerated dsp functions
331 int f_code; ///< forward MV resolution
332 int b_code; ///< backward MV resolution for B Frames (mpeg4)
333 int16_t (*p_mv_table_base)[2];
334 int16_t (*b_forw_mv_table_base)[2];
335 int16_t (*b_back_mv_table_base)[2];
336 int16_t (*b_bidir_forw_mv_table_base)[2];
337 int16_t (*b_bidir_back_mv_table_base)[2];
338 int16_t (*b_direct_mv_table_base)[2];
339 int16_t (*p_field_mv_table_base[2][2])[2];
340 int16_t (*b_field_mv_table_base[2][2][2])[2];
341 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
342 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
343 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
344 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
345 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
346 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
347 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
348 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
349 uint8_t (*p_field_select_table[2]);
350 uint8_t (*b_field_select_table[2][2]);
351 int me_method; ///< ME algorithm
352 int mv_dir;
353 #define MV_DIR_FORWARD 1
354 #define MV_DIR_BACKWARD 2
355 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
356 int mv_type;
357 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
358 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
359 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
360 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
361 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
362 /**motion vectors for a macroblock
363 first coordinate : 0 = forward 1 = backward
364 second " : depend on type
365 third " : 0 = x, 1 = y
366 */
367 int mv[2][4][2];
368 int field_select[2][2];
369 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
370 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
371 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
372
373 MotionEstContext me;
374
375 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
376 for b-frames rounding mode is always 0 */
377
378 int hurry_up; /**< when set to 1 during decoding, b frames will be skipped
379 when set to 2 idct/dequant will be skipped too */
380
381 /* macroblock layer */
382 int mb_x, mb_y;
383 int mb_skip_run;
384 int mb_intra;
385 uint16_t *mb_type; ///< Table for candidate MB types for encoding
386 #define CANDIDATE_MB_TYPE_INTRA 0x01
387 #define CANDIDATE_MB_TYPE_INTER 0x02
388 #define CANDIDATE_MB_TYPE_INTER4V 0x04
389 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
390 //#define MB_TYPE_GMC 0x10
391
392 #define CANDIDATE_MB_TYPE_DIRECT 0x10
393 #define CANDIDATE_MB_TYPE_FORWARD 0x20
394 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
395 #define CANDIDATE_MB_TYPE_BIDIR 0x80
396
397 #define CANDIDATE_MB_TYPE_INTER_I 0x100
398 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
399 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
400 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
401
402 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
403
404 int block_index[6]; ///< index to current MB in block based arrays with edges
405 int block_wrap[6];
406 uint8_t *dest[3];
407
408 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
409
410 /** matrix transmitted in the bitstream */
411 uint16_t intra_matrix[64];
412 uint16_t chroma_intra_matrix[64];
413 uint16_t inter_matrix[64];
414 uint16_t chroma_inter_matrix[64];
415 #define QUANT_BIAS_SHIFT 8
416 int intra_quant_bias; ///< bias for the quantizer
417 int inter_quant_bias; ///< bias for the quantizer
418 int min_qcoeff; ///< minimum encodable coefficient
419 int max_qcoeff; ///< maximum encodable coefficient
420 int ac_esc_length; ///< num of bits needed to encode the longest esc
421 uint8_t *intra_ac_vlc_length;
422 uint8_t *intra_ac_vlc_last_length;
423 uint8_t *inter_ac_vlc_length;
424 uint8_t *inter_ac_vlc_last_length;
425 uint8_t *luma_dc_vlc_length;
426 uint8_t *chroma_dc_vlc_length;
427 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
428
429 int coded_score[8];
430
431 /** precomputed matrix (combine qscale and DCT renorm) */
432 int (*q_intra_matrix)[64];
433 int (*q_inter_matrix)[64];
434 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
435 uint16_t (*q_intra_matrix16)[2][64];
436 uint16_t (*q_inter_matrix16)[2][64];
437 int block_last_index[12]; ///< last non zero coefficient in block
438 /* scantables */
439 ScanTable intra_scantable;
440 ScanTable intra_h_scantable;
441 ScanTable intra_v_scantable;
442 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
443
444 /* noise reduction */
445 int (*dct_error_sum)[64];
446 int dct_count[2];
447 uint16_t (*dct_offset)[64];
448
449 void *opaque; ///< private data for the user
450
451 /* bit rate control */
452 int64_t wanted_bits;
453 int64_t total_bits;
454 int frame_bits; ///< bits used for the current frame
455 int next_lambda; ///< next lambda used for retrying to encode a frame
456 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
457
458 /* statistics, used for 2-pass encoding */
459 int mv_bits;
460 int header_bits;
461 int i_tex_bits;
462 int p_tex_bits;
463 int i_count;
464 int f_count;
465 int b_count;
466 int skip_count;
467 int misc_bits; ///< cbp, mb_type
468 int last_bits; ///< temp var used for calculating the above vars
469
470 /* error concealment / resync */
471 int error_count;
472 uint8_t *error_status_table; ///< table of the error status of each MB
473 #define VP_START 1 ///< current MB is the first after a resync marker
474 #define AC_ERROR 2
475 #define DC_ERROR 4
476 #define MV_ERROR 8
477 #define AC_END 16
478 #define DC_END 32
479 #define MV_END 64
480 //FIXME some prefix?
481
482 int resync_mb_x; ///< x position of last resync marker
483 int resync_mb_y; ///< y position of last resync marker
484 GetBitContext last_resync_gb; ///< used to search for the next resync marker
485 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
486 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
487 int error_recognition;
488
489 ParseContext parse_context;
490
491 /* H.263 specific */
492 int gob_index;
493 int obmc; ///< overlapped block motion compensation
494 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
495
496 /* H.263+ specific */
497 int umvplus; ///< == H263+ && unrestricted_mv
498 int h263_aic; ///< Advanded INTRA Coding (AIC)
499 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
500 int h263_slice_structured;
501 int alt_inter_vlc; ///< alternative inter vlc
502 int modified_quant;
503 int loop_filter;
504 int custom_pcf;
505
506 /* mpeg4 specific */
507 int time_increment_bits; ///< number of bits to represent the fractional part of time
508 int last_time_base;
509 int time_base; ///< time in seconds of last I,P,S Frame
510 int64_t time; ///< time of current frame
511 int64_t last_non_b_time;
512 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
513 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
514 uint16_t pp_field_time;
515 uint16_t pb_field_time; ///< like above, just for interlaced
516 int shape;
517 int vol_sprite_usage;
518 int sprite_width;
519 int sprite_height;
520 int sprite_left;
521 int sprite_top;
522 int sprite_brightness_change;
523 int num_sprite_warping_points;
524 int real_sprite_warping_points;
525 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
526 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
527 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
528 int sprite_shift[2]; ///< sprite shift [isChroma]
529 int mcsel;
530 int quant_precision;
531 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
532 int scalability;
533 int hierachy_type;
534 int enhancement_type;
535 int new_pred;
536 int reduced_res_vop;
537 int aspect_ratio_info; //FIXME remove
538 int sprite_warping_accuracy;
539 int low_latency_sprite;
540 int data_partitioning; ///< data partitioning flag from header
541 int partitioned_frame; ///< is current frame partitioned
542 int rvlc; ///< reversible vlc
543 int resync_marker; ///< could this stream contain resync markers
544 int low_delay; ///< no reordering needed / has no b-frames
545 int vo_type;
546 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
547 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
548 int use_intra_dc_vlc;
549 PutBitContext tex_pb; ///< used for data partitioned VOPs
550 PutBitContext pb2; ///< used for data partitioned VOPs
551 int mpeg_quant;
552 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
553 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
554 int cplx_estimation_trash_i;
555 int cplx_estimation_trash_p;
556 int cplx_estimation_trash_b;
557
558 /* divx specific, used to workaround (many) bugs in divx5 */
559 int divx_version;
560 int divx_build;
561 int divx_packed;
562 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
563 int bitstream_buffer_size;
564 unsigned int allocated_bitstream_buffer_size;
565
566 int xvid_build;
567
568 /* lavc specific stuff, used to workaround bugs in libavcodec */
569 int lavc_build;
570
571 /* RV10 specific */
572 int rv10_version; ///< RV10 version: 0 or 3
573 int rv10_first_dc_coded[3];
574 int orig_width, orig_height;
575
576 /* MJPEG specific */
577 struct MJpegContext *mjpeg_ctx;
578 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
579 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
580
581 /* MSMPEG4 specific */
582 int mv_table_index;
583 int rl_table_index;
584 int rl_chroma_table_index;
585 int dc_table_index;
586 int use_skip_mb_code;
587 int slice_height; ///< in macroblocks
588 int first_slice_line; ///< used in mpeg4 too to handle resync markers
589 int flipflop_rounding;
590 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
591 int per_mb_rl_table;
592 int esc3_level_length;
593 int esc3_run_length;
594 /** [mb_intra][isChroma][level][run][last] */
595 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
596 int inter_intra_pred;
597 int mspel;
598
599 /* decompression specific */
600 GetBitContext gb;
601
602 /* Mpeg1 specific */
603 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
604 int last_mv_dir; ///< last mv_dir, used for b frame encoding
605 int broken_link; ///< no_output_of_prior_pics_flag
606 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
607
608 /* MPEG-2-specific - I wished not to have to support this mess. */
609 int progressive_sequence;
610 int mpeg_f_code[2][2];
611 int picture_structure;
612 /* picture type */
613 #define PICT_TOP_FIELD 1
614 #define PICT_BOTTOM_FIELD 2
615 #define PICT_FRAME 3
616
617 int intra_dc_precision;
618 int frame_pred_frame_dct;
619 int top_field_first;
620 int concealment_motion_vectors;
621 int q_scale_type;
622 int intra_vlc_format;
623 int alternate_scan;
624 int repeat_first_field;
625 int chroma_420_type;
626 int chroma_format;
627 #define CHROMA_420 1
628 #define CHROMA_422 2
629 #define CHROMA_444 3
630 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
631 int chroma_y_shift;
632
633 int progressive_frame;
634 int full_pel[2];
635 int interlaced_dct;
636 int first_slice;
637 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
638
639 /* RTP specific */
640 int rtp_mode;
641
642 uint8_t *ptr_lastgob;
643 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
644 DCTELEM (*pblocks[12])[64];
645
646 DCTELEM (*block)[64]; ///< points to one of the following blocks
647 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
648 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
649 #define SLICE_OK 0
650 #define SLICE_ERROR -1
651 #define SLICE_END -2 ///<end marker found
652 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
653
654 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
655 DCTELEM *block/*align 16*/, int n, int qscale);
656 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
657 DCTELEM *block/*align 16*/, int n, int qscale);
658 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
659 DCTELEM *block/*align 16*/, int n, int qscale);
660 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
661 DCTELEM *block/*align 16*/, int n, int qscale);
662 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
663 DCTELEM *block/*align 16*/, int n, int qscale);
664 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
665 DCTELEM *block/*align 16*/, int n, int qscale);
666 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
667 DCTELEM *block/*align 16*/, int n, int qscale);
668 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
669 DCTELEM *block/*align 16*/, int n, int qscale);
670 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
671 DCTELEM *block/*align 16*/, int n, int qscale);
672 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
673 DCTELEM *block/*align 16*/, int n, int qscale);
674 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
675 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
676 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
677 } MpegEncContext;
678
679
680 void MPV_decode_defaults(MpegEncContext *s);
681 int MPV_common_init(MpegEncContext *s);
682 void MPV_common_end(MpegEncContext *s);
683 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
684 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
685 void MPV_frame_end(MpegEncContext *s);
686 int MPV_encode_init(AVCodecContext *avctx);
687 int MPV_encode_end(AVCodecContext *avctx);
688 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
689 void MPV_common_init_mmx(MpegEncContext *s);
690 void MPV_common_init_axp(MpegEncContext *s);
691 void MPV_common_init_mlib(MpegEncContext *s);
692 void MPV_common_init_mmi(MpegEncContext *s);
693 void MPV_common_init_arm(MpegEncContext *s);
694 void MPV_common_init_altivec(MpegEncContext *s);
695 void ff_clean_intra_table_entries(MpegEncContext *s);
696 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
697 void ff_mpeg_flush(AVCodecContext *avctx);
698 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
699 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
700 int ff_find_unused_picture(MpegEncContext *s, int shared);
701 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
702 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
703 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
704
705 void ff_er_frame_start(MpegEncContext *s);
706 void ff_er_frame_end(MpegEncContext *s);
707 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
708
709 int ff_dct_common_init(MpegEncContext *s);
710 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
711 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
712
713 void ff_init_block_index(MpegEncContext *s);
714 void ff_copy_picture(Picture *dst, Picture *src);
715
716 /**
717 * allocates a Picture
718 * The pixels are allocated/set by calling get_buffer() if shared=0
719 */
720 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
721
722 extern const enum PixelFormat ff_pixfmt_list_420[];
723 extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[];
724
725 static inline void ff_update_block_index(MpegEncContext *s){
726 const int block_size= 8>>s->avctx->lowres;
727
728 s->block_index[0]+=2;
729 s->block_index[1]+=2;
730 s->block_index[2]+=2;
731 s->block_index[3]+=2;
732 s->block_index[4]++;
733 s->block_index[5]++;
734 s->dest[0]+= 2*block_size;
735 s->dest[1]+= block_size;
736 s->dest[2]+= block_size;
737 }
738
739 static inline int get_bits_diff(MpegEncContext *s){
740 const int bits= put_bits_count(&s->pb);
741 const int last= s->last_bits;
742
743 s->last_bits = bits;
744
745 return bits - last;
746 }
747
748 static inline int ff_h263_round_chroma(int x){
749 static const uint8_t h263_chroma_roundtab[16] = {
750 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
751 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
752 };
753 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
754 }
755
756 /* motion_est.c */
757 void ff_estimate_p_frame_motion(MpegEncContext * s,
758 int mb_x, int mb_y);
759 void ff_estimate_b_frame_motion(MpegEncContext * s,
760 int mb_x, int mb_y);
761 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
762 void ff_fix_long_p_mvs(MpegEncContext * s);
763 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
764 int16_t (*mv_table)[2], int f_code, int type, int truncate);
765 int ff_init_me(MpegEncContext *s);
766 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
767 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
768 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
769 int ref_mv_scale, int size, int h);
770 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
771 int ref_index, int size, int h, int add_rate);
772
773 /* mpeg12.c */
774 extern const uint8_t ff_mpeg1_dc_scale_table[128];
775
776 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
777 void mpeg1_encode_mb(MpegEncContext *s,
778 DCTELEM block[6][64],
779 int motion_x, int motion_y);
780 void ff_mpeg1_encode_init(MpegEncContext *s);
781 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
782 void ff_mpeg1_clean_buffers(MpegEncContext *s);
783 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
784
785 extern const uint8_t ff_aic_dc_scale_table[32];
786 extern const uint8_t ff_h263_chroma_qscale_table[32];
787 extern const uint8_t ff_h263_loop_filter_strength[32];
788
789 /* h261.c */
790 void ff_h261_loop_filter(MpegEncContext *s);
791 void ff_h261_reorder_mb_index(MpegEncContext* s);
792 void ff_h261_encode_mb(MpegEncContext *s,
793 DCTELEM block[6][64],
794 int motion_x, int motion_y);
795 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
796 void ff_h261_encode_init(MpegEncContext *s);
797 int ff_h261_get_picture_format(int width, int height);
798
799
800 /* rv10.c */
801 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
802 int rv_decode_dc(MpegEncContext *s, int n);
803 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
804
805
806 /* msmpeg4.c */
807 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
808 void msmpeg4_encode_ext_header(MpegEncContext * s);
809 void msmpeg4_encode_mb(MpegEncContext * s,
810 DCTELEM block[6][64],
811 int motion_x, int motion_y);
812 int msmpeg4_decode_picture_header(MpegEncContext * s);
813 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
814 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
815 void ff_msmpeg4_encode_init(MpegEncContext *s);
816 int ff_wmv2_decode_picture_header(MpegEncContext * s);
817 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
818 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
819 void ff_mspel_motion(MpegEncContext *s,
820 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
821 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
822 int motion_x, int motion_y, int h);
823 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
824 void ff_wmv2_encode_mb(MpegEncContext * s,
825 DCTELEM block[6][64],
826 int motion_x, int motion_y);
827
828 #endif /* AVCODEC_MPEGVIDEO_H */
829