ljpegenc: deMpegEncContextize
[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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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
25 * mpegvideo header.
26 */
27
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
30
31 #include "avcodec.h"
32 #include "dsputil.h"
33 #include "error_resilience.h"
34 #include "get_bits.h"
35 #include "h263dsp.h"
36 #include "hpeldsp.h"
37 #include "put_bits.h"
38 #include "ratecontrol.h"
39 #include "parser.h"
40 #include "mpeg12data.h"
41 #include "rl.h"
42 #include "thread.h"
43 #include "videodsp.h"
44
45 #include "libavutil/opt.h"
46
47 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
48
49 enum OutputFormat {
50 FMT_MPEG1,
51 FMT_H261,
52 FMT_H263,
53 FMT_MJPEG,
54 };
55
56 #define MPEG_BUF_SIZE (16 * 1024)
57
58 #define QMAT_SHIFT_MMX 16
59 #define QMAT_SHIFT 22
60
61 #define MAX_FCODE 7
62 #define MAX_MV 2048
63
64 #define MAX_THREADS 16
65
66 #define MAX_PICTURE_COUNT 32
67
68 #define MAX_B_FRAMES 16
69
70 #define ME_MAP_SIZE 64
71 #define ME_MAP_SHIFT 3
72 #define ME_MAP_MV_BITS 11
73
74 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
75
76 #define INPLACE_OFFSET 16
77
78 /* Start codes. */
79 #define SEQ_END_CODE 0x000001b7
80 #define SEQ_START_CODE 0x000001b3
81 #define GOP_START_CODE 0x000001b8
82 #define PICTURE_START_CODE 0x00000100
83 #define SLICE_MIN_START_CODE 0x00000101
84 #define SLICE_MAX_START_CODE 0x000001af
85 #define EXT_START_CODE 0x000001b5
86 #define USER_START_CODE 0x000001b2
87
88 /**
89 * Value of Picture.reference when Picture is not a reference picture, but
90 * is held for delayed output.
91 */
92 #define DELAYED_PIC_REF 4
93
94 struct MpegEncContext;
95
96 /**
97 * Picture.
98 */
99 typedef struct Picture{
100 struct AVFrame f;
101 ThreadFrame tf;
102
103 AVBufferRef *qscale_table_buf;
104 int8_t *qscale_table;
105
106 AVBufferRef *motion_val_buf[2];
107 int16_t (*motion_val[2])[2];
108
109 AVBufferRef *mb_type_buf;
110 uint32_t *mb_type;
111
112 #if !FF_API_MB_TYPE
113 #define MB_TYPE_INTRA4x4 0x0001
114 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
115 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
116 #define MB_TYPE_16x16 0x0008
117 #define MB_TYPE_16x8 0x0010
118 #define MB_TYPE_8x16 0x0020
119 #define MB_TYPE_8x8 0x0040
120 #define MB_TYPE_INTERLACED 0x0080
121 #define MB_TYPE_DIRECT2 0x0100 //FIXME
122 #define MB_TYPE_ACPRED 0x0200
123 #define MB_TYPE_GMC 0x0400
124 #define MB_TYPE_SKIP 0x0800
125 #define MB_TYPE_P0L0 0x1000
126 #define MB_TYPE_P1L0 0x2000
127 #define MB_TYPE_P0L1 0x4000
128 #define MB_TYPE_P1L1 0x8000
129 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
130 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
131 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
132 #define MB_TYPE_QUANT 0x00010000
133 #define MB_TYPE_CBP 0x00020000
134 #endif
135
136 AVBufferRef *mbskip_table_buf;
137 uint8_t *mbskip_table;
138
139 AVBufferRef *ref_index_buf[2];
140 int8_t *ref_index[2];
141
142 AVBufferRef *mb_var_buf;
143 uint16_t *mb_var; ///< Table for MB variances
144
145 AVBufferRef *mc_mb_var_buf;
146 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
147
148 AVBufferRef *mb_mean_buf;
149 uint8_t *mb_mean; ///< Table for MB luminance
150
151 AVBufferRef *hwaccel_priv_buf;
152 /**
153 * hardware accelerator private data
154 */
155 void *hwaccel_picture_private;
156
157 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
158 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
159 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
160 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
161 #define IS_INTRA(a) ((a)&7)
162 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
163 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
164 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
165 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
166 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
167 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
168 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
169 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
170 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
171 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
172 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
173 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
174 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
175 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
176 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
177 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
178 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
179 #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
180 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
181
182 int field_poc[2]; ///< h264 top/bottom POC
183 int poc; ///< h264 frame POC
184 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
185 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
186 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
187 pic_num & max_pic_num; long -> long_pic_num) */
188 int long_ref; ///< 1->long term reference 0->short term reference
189 int ref_poc[2][2][32]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
190 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
191 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
192 int field_picture; ///< whether or not the picture was encoded in separate fields
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
197 int b_frame_score; /* */
198 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
199
200 int reference;
201 int shared;
202 int recovered; ///< Picture at IDR or recovery point + recovery count
203 } Picture;
204
205 /**
206 * Motion estimation context.
207 */
208 typedef struct MotionEstContext{
209 AVCodecContext *avctx;
210 int skip; ///< set if ME is skipped for the current MB
211 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
212 int direct_basis_mv[4][2];
213 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
214 uint8_t *best_mb;
215 uint8_t *temp_mb[2];
216 uint8_t *temp;
217 int best_bits;
218 uint32_t *map; ///< map to avoid duplicate evaluations
219 uint32_t *score_map; ///< map to store the scores
220 unsigned map_generation;
221 int pre_penalty_factor;
222 int penalty_factor; /**< an estimate of the bits required to
223 code a given mv value, e.g. (1,0) takes
224 more bits than (0,0). We have to
225 estimate whether any reduction in
226 residual is worth the extra bits. */
227 int sub_penalty_factor;
228 int mb_penalty_factor;
229 int flags;
230 int sub_flags;
231 int mb_flags;
232 int pre_pass; ///< = 1 for the pre pass
233 int dia_size;
234 int xmin;
235 int xmax;
236 int ymin;
237 int ymax;
238 int pred_x;
239 int pred_y;
240 uint8_t *src[4][4];
241 uint8_t *ref[4][4];
242 int stride;
243 int uvstride;
244 /* temp variables for picture complexity calculation */
245 int mc_mb_var_sum_temp;
246 int mb_var_sum_temp;
247 int scene_change_score;
248 /* cmp, chroma_cmp;*/
249 op_pixels_func (*hpel_put)[4];
250 op_pixels_func (*hpel_avg)[4];
251 qpel_mc_func (*qpel_put)[16];
252 qpel_mc_func (*qpel_avg)[16];
253 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
254 uint8_t *current_mv_penalty;
255 int (*sub_motion_search)(struct MpegEncContext * s,
256 int *mx_ptr, int *my_ptr, int dmin,
257 int src_index, int ref_index,
258 int size, int h);
259 }MotionEstContext;
260
261 /**
262 * MpegEncContext.
263 */
264 typedef struct MpegEncContext {
265 AVClass *class;
266 struct AVCodecContext *avctx;
267 /* the following parameters must be initialized before encoding */
268 int width, height;///< picture size. must be a multiple of 16
269 int gop_size;
270 int intra_only; ///< if true, only intra pictures are generated
271 int bit_rate; ///< wanted bit rate
272 enum OutputFormat out_format; ///< output format
273 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
274 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
275
276 /* the following codec id fields are deprecated in favor of codec_id */
277 int h263_plus; ///< h263 plus headers
278 int h263_flv; ///< use flv h263 header
279
280 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
281 int fixed_qscale; ///< fixed qscale if non zero
282 int encoding; ///< true if we are encoding (vs decoding)
283 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
284 int flags2; ///< AVCodecContext.flags2
285 int max_b_frames; ///< max number of b-frames for encoding
286 int luma_elim_threshold;
287 int chroma_elim_threshold;
288 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
289 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
290 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
291 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
292 /* the following fields are managed internally by the encoder */
293
294 /* sequence parameters */
295 int context_initialized;
296 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
297 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
298 int picture_number; //FIXME remove, unclear definition
299 int picture_in_gop_number; ///< 0-> first pic in gop, ...
300 int mb_width, mb_height; ///< number of MBs horizontally & vertically
301 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
302 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
303 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
304 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
305 int mb_num; ///< number of MBs of a picture
306 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
307 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
308 Picture *picture; ///< main picture buffer
309 Picture **input_picture; ///< next pictures on display order for encoding
310 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
311
312 int y_dc_scale, c_dc_scale;
313 int ac_pred;
314 int block_last_index[12]; ///< last non zero coefficient in block
315 int h263_aic; ///< Advanded INTRA Coding (AIC)
316
317 /* scantables */
318 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
319 ScanTable intra_scantable;
320 ScanTable intra_h_scantable;
321 ScanTable intra_v_scantable;
322
323 /* WARNING: changes above this line require updates to hardcoded
324 * offsets used in asm. */
325
326 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
327 /**
328 * pts difference between the first and second input frame, used for
329 * calculating dts of the first frame when there's a delay */
330 int64_t dts_delta;
331 /**
332 * reordered pts to be used as dts for the next output frame when there's
333 * a delay */
334 int64_t reordered_pts;
335
336 /** bit output */
337 PutBitContext pb;
338
339 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
340 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
341 struct MpegEncContext *thread_context[MAX_THREADS];
342 int slice_context_count; ///< number of used thread_contexts
343
344 /**
345 * copy of the previous picture structure.
346 * note, linesize & data, might not match the previous picture (for field pictures)
347 */
348 Picture last_picture;
349
350 /**
351 * copy of the next picture structure.
352 * note, linesize & data, might not match the next picture (for field pictures)
353 */
354 Picture next_picture;
355
356 /**
357 * copy of the source picture structure for encoding.
358 * note, linesize & data, might not match the source picture (for field pictures)
359 */
360 Picture new_picture;
361
362 /**
363 * copy of the current picture structure.
364 * note, linesize & data, might not match the current picture (for field pictures)
365 */
366 Picture current_picture; ///< buffer to store the decompressed current picture
367
368 Picture *last_picture_ptr; ///< pointer to the previous picture.
369 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
370 Picture *current_picture_ptr; ///< pointer to the current picture
371 int last_dc[3]; ///< last DC values for MPEG1
372 int16_t *dc_val_base;
373 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
374 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
375 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
376 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
377 uint8_t *coded_block_base;
378 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
379 int16_t (*ac_val_base)[16];
380 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
381 int mb_skipped; ///< MUST BE SET only during DECODING
382 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
383 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
384 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
385 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
386 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
387 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
388 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
389 uint8_t *obmc_scratchpad;
390 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
391
392 int qscale; ///< QP
393 int chroma_qscale; ///< chroma QP
394 unsigned int lambda; ///< lagrange multipler used in rate distortion
395 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
396 int *lambda_table;
397 int adaptive_quant; ///< use adaptive quantization
398 int dquant; ///< qscale difference to prev qscale
399 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
400 int last_pict_type; //FIXME removes
401 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
402 int droppable;
403 int frame_rate_index;
404 int last_lambda_for[5]; ///< last lambda for a specific pict type
405 int skipdct; ///< skip dct and code zero residual
406
407 /* motion compensation */
408 int unrestricted_mv; ///< mv can point outside of the coded picture
409 int h263_long_vectors; ///< use horrible h263v1 long vector mode
410
411 DSPContext dsp; ///< pointers for accelerated dsp functions
412 HpelDSPContext hdsp;
413 VideoDSPContext vdsp;
414 H263DSPContext h263dsp;
415 int f_code; ///< forward MV resolution
416 int b_code; ///< backward MV resolution for B Frames (mpeg4)
417 int16_t (*p_mv_table_base)[2];
418 int16_t (*b_forw_mv_table_base)[2];
419 int16_t (*b_back_mv_table_base)[2];
420 int16_t (*b_bidir_forw_mv_table_base)[2];
421 int16_t (*b_bidir_back_mv_table_base)[2];
422 int16_t (*b_direct_mv_table_base)[2];
423 int16_t (*p_field_mv_table_base[2][2])[2];
424 int16_t (*b_field_mv_table_base[2][2][2])[2];
425 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
426 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
427 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
428 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
429 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
430 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
431 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
432 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
433 uint8_t (*p_field_select_table[2]);
434 uint8_t (*b_field_select_table[2][2]);
435 int me_method; ///< ME algorithm
436 int mv_dir;
437 #define MV_DIR_FORWARD 1
438 #define MV_DIR_BACKWARD 2
439 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
440 int mv_type;
441 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
442 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
443 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
444 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
445 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
446 /**motion vectors for a macroblock
447 first coordinate : 0 = forward 1 = backward
448 second " : depend on type
449 third " : 0 = x, 1 = y
450 */
451 int mv[2][4][2];
452 int field_select[2][2];
453 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
454 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
455 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
456
457 MotionEstContext me;
458
459 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
460 for b-frames rounding mode is always 0 */
461
462 /* macroblock layer */
463 int mb_x, mb_y;
464 int mb_skip_run;
465 int mb_intra;
466 uint16_t *mb_type; ///< Table for candidate MB types for encoding
467 #define CANDIDATE_MB_TYPE_INTRA 0x01
468 #define CANDIDATE_MB_TYPE_INTER 0x02
469 #define CANDIDATE_MB_TYPE_INTER4V 0x04
470 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
471 //#define MB_TYPE_GMC 0x10
472
473 #define CANDIDATE_MB_TYPE_DIRECT 0x10
474 #define CANDIDATE_MB_TYPE_FORWARD 0x20
475 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
476 #define CANDIDATE_MB_TYPE_BIDIR 0x80
477
478 #define CANDIDATE_MB_TYPE_INTER_I 0x100
479 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
480 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
481 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
482
483 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
484
485 int block_index[6]; ///< index to current MB in block based arrays with edges
486 int block_wrap[6];
487 uint8_t *dest[3];
488
489 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
490
491 /** matrix transmitted in the bitstream */
492 uint16_t intra_matrix[64];
493 uint16_t chroma_intra_matrix[64];
494 uint16_t inter_matrix[64];
495 uint16_t chroma_inter_matrix[64];
496 #define QUANT_BIAS_SHIFT 8
497 int intra_quant_bias; ///< bias for the quantizer
498 int inter_quant_bias; ///< bias for the quantizer
499 int min_qcoeff; ///< minimum encodable coefficient
500 int max_qcoeff; ///< maximum encodable coefficient
501 int ac_esc_length; ///< num of bits needed to encode the longest esc
502 uint8_t *intra_ac_vlc_length;
503 uint8_t *intra_ac_vlc_last_length;
504 uint8_t *inter_ac_vlc_length;
505 uint8_t *inter_ac_vlc_last_length;
506 uint8_t *luma_dc_vlc_length;
507 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
508
509 int coded_score[8];
510
511 /** precomputed matrix (combine qscale and DCT renorm) */
512 int (*q_intra_matrix)[64];
513 int (*q_inter_matrix)[64];
514 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
515 uint16_t (*q_intra_matrix16)[2][64];
516 uint16_t (*q_inter_matrix16)[2][64];
517
518 /* noise reduction */
519 int (*dct_error_sum)[64];
520 int dct_count[2];
521 uint16_t (*dct_offset)[64];
522
523 void *opaque; ///< private data for the user
524
525 /* bit rate control */
526 int64_t total_bits;
527 int frame_bits; ///< bits used for the current frame
528 int next_lambda; ///< next lambda used for retrying to encode a frame
529 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
530
531 /* statistics, used for 2-pass encoding */
532 int mv_bits;
533 int header_bits;
534 int i_tex_bits;
535 int p_tex_bits;
536 int i_count;
537 int f_count;
538 int b_count;
539 int skip_count;
540 int misc_bits; ///< cbp, mb_type
541 int last_bits; ///< temp var used for calculating the above vars
542
543 /* error concealment / resync */
544 int resync_mb_x; ///< x position of last resync marker
545 int resync_mb_y; ///< y position of last resync marker
546 GetBitContext last_resync_gb; ///< used to search for the next resync marker
547 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
548 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
549 int err_recognition;
550
551 ParseContext parse_context;
552
553 /* H.263 specific */
554 int gob_index;
555 int obmc; ///< overlapped block motion compensation
556 int mb_info; ///< interval for outputting info about mb offsets as side data
557 int prev_mb_info, last_mb_info;
558 uint8_t *mb_info_ptr;
559 int mb_info_size;
560
561 /* H.263+ specific */
562 int umvplus; ///< == H263+ && unrestricted_mv
563 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
564 int h263_slice_structured;
565 int alt_inter_vlc; ///< alternative inter vlc
566 int modified_quant;
567 int loop_filter;
568 int custom_pcf;
569
570 /* mpeg4 specific */
571 ///< number of bits to represent the fractional part of time (encoder only)
572 int time_increment_bits;
573 int last_time_base;
574 int time_base; ///< time in seconds of last I,P,S Frame
575 int64_t time; ///< time of current frame
576 int64_t last_non_b_time;
577 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
578 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
579 uint16_t pp_field_time;
580 uint16_t pb_field_time; ///< like above, just for interlaced
581 int real_sprite_warping_points;
582 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
583 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
584 int mcsel;
585 int quant_precision;
586 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
587 int aspect_ratio_info; //FIXME remove
588 int sprite_warping_accuracy;
589 int data_partitioning; ///< data partitioning flag from header
590 int partitioned_frame; ///< is current frame partitioned
591 int low_delay; ///< no reordering needed / has no b-frames
592 int vo_type;
593 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
594 PutBitContext tex_pb; ///< used for data partitioned VOPs
595 PutBitContext pb2; ///< used for data partitioned VOPs
596 int mpeg_quant;
597 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
598
599 /* divx specific, used to workaround (many) bugs in divx5 */
600 int divx_packed;
601 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
602 int bitstream_buffer_size;
603 unsigned int allocated_bitstream_buffer_size;
604
605 /* RV10 specific */
606 int rv10_version; ///< RV10 version: 0 or 3
607 int rv10_first_dc_coded[3];
608 int orig_width, orig_height;
609
610 /* MJPEG specific */
611 struct MJpegContext *mjpeg_ctx;
612
613 /* MSMPEG4 specific */
614 int mv_table_index;
615 int rl_table_index;
616 int rl_chroma_table_index;
617 int dc_table_index;
618 int use_skip_mb_code;
619 int slice_height; ///< in macroblocks
620 int first_slice_line; ///< used in mpeg4 too to handle resync markers
621 int flipflop_rounding;
622 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
623 int per_mb_rl_table;
624 int esc3_level_length;
625 int esc3_run_length;
626 /** [mb_intra][isChroma][level][run][last] */
627 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
628 int inter_intra_pred;
629 int mspel;
630
631 /* decompression specific */
632 GetBitContext gb;
633
634 /* Mpeg1 specific */
635 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
636 int last_mv_dir; ///< last mv_dir, used for b frame encoding
637 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
638
639 /* MPEG-2-specific - I wished not to have to support this mess. */
640 int progressive_sequence;
641 int mpeg_f_code[2][2];
642 int picture_structure;
643 /* picture type */
644 #define PICT_TOP_FIELD 1
645 #define PICT_BOTTOM_FIELD 2
646 #define PICT_FRAME 3
647
648 int intra_dc_precision;
649 int frame_pred_frame_dct;
650 int top_field_first;
651 int concealment_motion_vectors;
652 int q_scale_type;
653 int intra_vlc_format;
654 int alternate_scan;
655 int repeat_first_field;
656 int chroma_420_type;
657 int chroma_format;
658 #define CHROMA_420 1
659 #define CHROMA_422 2
660 #define CHROMA_444 3
661 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
662 int chroma_y_shift;
663
664 int progressive_frame;
665 int full_pel[2];
666 int interlaced_dct;
667 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
668 int drop_frame_timecode; ///< timecode is in drop frame format.
669 int scan_offset; ///< reserve space for SVCD scan offset user data.
670
671 /* RTP specific */
672 int rtp_mode;
673
674 uint8_t *ptr_lastgob;
675 int16_t (*pblocks[12])[64];
676
677 int16_t (*block)[64]; ///< points to one of the following blocks
678 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
679 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
680 #define SLICE_OK 0
681 #define SLICE_ERROR -1
682 #define SLICE_END -2 ///<end marker found
683 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
684
685 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
686 int16_t *block/*align 16*/, int n, int qscale);
687 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
688 int16_t *block/*align 16*/, int n, int qscale);
689 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
690 int16_t *block/*align 16*/, int n, int qscale);
691 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
692 int16_t *block/*align 16*/, int n, int qscale);
693 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
694 int16_t *block/*align 16*/, int n, int qscale);
695 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
696 int16_t *block/*align 16*/, int n, int qscale);
697 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
698 int16_t *block/*align 16*/, int n, int qscale);
699 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
700 int16_t *block/*align 16*/, int n, int qscale);
701 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
702 int16_t *block/*align 16*/, int n, int qscale);
703 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
704 int16_t *block/*align 16*/, int n, int qscale);
705 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
706 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
707 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
708
709 int mpv_flags; ///< flags set by private options
710 int quantizer_noise_shaping;
711
712 /* temp buffers for rate control */
713 float *cplx_tab, *bits_tab;
714
715 /* flag to indicate a reinitialization is required, e.g. after
716 * a frame size change */
717 int context_reinit;
718
719 ERContext er;
720
721 int error_rate;
722
723 /* temporary frames used by b_frame_strategy = 2 */
724 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
725 } MpegEncContext;
726
727 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
728 ((pic && pic >= old_ctx->picture && \
729 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
730 &new_ctx->picture[pic - old_ctx->picture] : NULL)
731
732 /* mpegvideo_enc common options */
733 #define FF_MPV_FLAG_SKIP_RD 0x0001
734 #define FF_MPV_FLAG_STRICT_GOP 0x0002
735 #define FF_MPV_FLAG_QP_RD 0x0004
736 #define FF_MPV_FLAG_CBP_RD 0x0008
737
738 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
739 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
740 #define FF_MPV_COMMON_OPTS \
741 { "mpv_flags", "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\
742 { "skip_rd", "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_SKIP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
743 { "strict_gop", "Strictly enforce gop size", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_STRICT_GOP }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
744 { "qp_rd", "Use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_QP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
745 { "cbp_rd", "use rate distortion optimization for CBP", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_CBP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
746 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
747 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
748 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
749 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
750 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },\
751 { "error_rate", "Simulate errors in the bitstream to test error concealment.", \
752 FF_MPV_OFFSET(error_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
753
754 extern const AVOption ff_mpv_generic_options[];
755
756 #define FF_MPV_GENERIC_CLASS(name) \
757 static const AVClass name ## _class = {\
758 .class_name = #name " encoder",\
759 .item_name = av_default_item_name,\
760 .option = ff_mpv_generic_options,\
761 .version = LIBAVUTIL_VERSION_INT,\
762 };
763
764 /**
765 * Set the given MpegEncContext to common defaults (same for encoding
766 * and decoding). The changed fields will not depend upon the prior
767 * state of the MpegEncContext.
768 */
769 void ff_MPV_common_defaults(MpegEncContext *s);
770
771 void ff_MPV_decode_defaults(MpegEncContext *s);
772 int ff_MPV_common_init(MpegEncContext *s);
773 int ff_MPV_common_frame_size_change(MpegEncContext *s);
774 void ff_MPV_common_end(MpegEncContext *s);
775 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
776 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
777 void ff_MPV_frame_end(MpegEncContext *s);
778 int ff_MPV_encode_init(AVCodecContext *avctx);
779 int ff_MPV_encode_end(AVCodecContext *avctx);
780 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
781 const AVFrame *frame, int *got_packet);
782 void ff_MPV_encode_init_x86(MpegEncContext *s);
783 void ff_MPV_common_init_x86(MpegEncContext *s);
784 void ff_MPV_common_init_arm(MpegEncContext *s);
785 void ff_MPV_common_init_bfin(MpegEncContext *s);
786 void ff_MPV_common_init_ppc(MpegEncContext *s);
787 void ff_clean_intra_table_entries(MpegEncContext *s);
788 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
789 Picture *last, int y, int h, int picture_structure,
790 int first_field, int draw_edges, int low_delay,
791 int v_edge_pos, int h_edge_pos);
792 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
793 void ff_mpeg_flush(AVCodecContext *avctx);
794 void ff_print_debug_info(MpegEncContext *s, Picture *p);
795 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
796 int ff_find_unused_picture(MpegEncContext *s, int shared);
797 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
798 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
799 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
800 void ff_MPV_report_decode_progress(MpegEncContext *s);
801 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
802 void ff_set_qscale(MpegEncContext * s, int qscale);
803
804 void ff_mpeg_er_frame_start(MpegEncContext *s);
805
806 int ff_dct_common_init(MpegEncContext *s);
807 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
808 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
809 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
810
811 void ff_init_block_index(MpegEncContext *s);
812
813 void ff_MPV_motion(MpegEncContext *s,
814 uint8_t *dest_y, uint8_t *dest_cb,
815 uint8_t *dest_cr, int dir,
816 uint8_t **ref_picture,
817 op_pixels_func (*pix_op)[4],
818 qpel_mc_func (*qpix_op)[16]);
819
820 /**
821 * Allocate a Picture.
822 * The pixels are allocated/set by calling get_buffer() if shared = 0.
823 */
824 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
825
826 extern const enum AVPixelFormat ff_pixfmt_list_420[];
827
828 /**
829 * permute block according to permuatation.
830 * @param last last non zero element in scantable order
831 */
832 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
833
834 static inline void ff_update_block_index(MpegEncContext *s){
835 const int block_size = 8;
836
837 s->block_index[0]+=2;
838 s->block_index[1]+=2;
839 s->block_index[2]+=2;
840 s->block_index[3]+=2;
841 s->block_index[4]++;
842 s->block_index[5]++;
843 s->dest[0]+= 2*block_size;
844 s->dest[1]+= block_size;
845 s->dest[2]+= block_size;
846 }
847
848 static inline int get_bits_diff(MpegEncContext *s){
849 const int bits= put_bits_count(&s->pb);
850 const int last= s->last_bits;
851
852 s->last_bits = bits;
853
854 return bits - last;
855 }
856
857 static inline int ff_h263_round_chroma(int x){
858 static const uint8_t h263_chroma_roundtab[16] = {
859 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
860 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
861 };
862 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
863 }
864
865 /* motion_est.c */
866 void ff_estimate_p_frame_motion(MpegEncContext * s,
867 int mb_x, int mb_y);
868 void ff_estimate_b_frame_motion(MpegEncContext * s,
869 int mb_x, int mb_y);
870 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
871 void ff_fix_long_p_mvs(MpegEncContext * s);
872 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
873 int16_t (*mv_table)[2], int f_code, int type, int truncate);
874 int ff_init_me(MpegEncContext *s);
875 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
876 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
877 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
878 int ref_mv_scale, int size, int h);
879 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
880 int ref_index, int size, int h, int add_rate);
881
882 /* mpeg12.c */
883 extern const uint8_t ff_mpeg1_dc_scale_table[128];
884 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
885
886 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
887 void ff_mpeg1_encode_mb(MpegEncContext *s,
888 int16_t block[6][64],
889 int motion_x, int motion_y);
890 void ff_mpeg1_encode_init(MpegEncContext *s);
891 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
892
893 extern const uint8_t ff_aic_dc_scale_table[32];
894 extern const uint8_t ff_h263_chroma_qscale_table[32];
895
896 /* rv10.c */
897 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
898 int ff_rv_decode_dc(MpegEncContext *s, int n);
899 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
900
901
902 /* msmpeg4.c */
903 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
904 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
905 void ff_msmpeg4_encode_mb(MpegEncContext * s,
906 int16_t block[6][64],
907 int motion_x, int motion_y);
908 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
909 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
910 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
911 void ff_msmpeg4_encode_init(MpegEncContext *s);
912 int ff_wmv2_decode_picture_header(MpegEncContext * s);
913 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
914 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
915 void ff_mspel_motion(MpegEncContext *s,
916 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
917 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
918 int motion_x, int motion_y, int h);
919 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
920 void ff_wmv2_encode_mb(MpegEncContext * s,
921 int16_t block[6][64],
922 int motion_x, int motion_y);
923
924 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
925 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
926 void ff_free_picture_tables(Picture *pic);
927
928 #endif /* AVCODEC_MPEGVIDEO_H */