f3f982742b354094bf316170976a21b4175106be
[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 "get_bits.h"
34 #include "put_bits.h"
35 #include "ratecontrol.h"
36 #include "parser.h"
37 #include "mpeg12data.h"
38 #include "rl.h"
39 #include "videodsp.h"
40
41 #include "libavutil/opt.h"
42
43 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
44
45 enum OutputFormat {
46 FMT_MPEG1,
47 FMT_H261,
48 FMT_H263,
49 FMT_MJPEG,
50 FMT_H264,
51 };
52
53 #define MPEG_BUF_SIZE (16 * 1024)
54
55 #define QMAT_SHIFT_MMX 16
56 #define QMAT_SHIFT 22
57
58 #define MAX_FCODE 7
59 #define MAX_MV 2048
60
61 #define MAX_THREADS 16
62
63 #define MAX_PICTURE_COUNT 32
64
65 #define ME_MAP_SIZE 64
66 #define ME_MAP_SHIFT 3
67 #define ME_MAP_MV_BITS 11
68
69 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
70
71 #define INPLACE_OFFSET 16
72
73 /* Start codes. */
74 #define SEQ_END_CODE 0x000001b7
75 #define SEQ_START_CODE 0x000001b3
76 #define GOP_START_CODE 0x000001b8
77 #define PICTURE_START_CODE 0x00000100
78 #define SLICE_MIN_START_CODE 0x00000101
79 #define SLICE_MAX_START_CODE 0x000001af
80 #define EXT_START_CODE 0x000001b5
81 #define USER_START_CODE 0x000001b2
82
83 /**
84 * Value of Picture.reference when Picture is not a reference picture, but
85 * is held for delayed output.
86 */
87 #define DELAYED_PIC_REF 4
88
89 struct MpegEncContext;
90
91 /**
92 * Picture.
93 */
94 typedef struct Picture{
95 struct AVFrame f;
96
97 int8_t *qscale_table_base;
98 int16_t (*motion_val_base[2])[2];
99 uint32_t *mb_type_base;
100 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
101 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
102 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
103 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
104 #define IS_INTRA(a) ((a)&7)
105 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
106 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
107 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
108 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
109 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
110 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
111 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
112 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
113 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
114 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
115 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
116 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
117 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
118 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
119 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
120 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
121 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
122 #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
123 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
124
125 int field_poc[2]; ///< h264 top/bottom POC
126 int poc; ///< h264 frame POC
127 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
128 int mmco_reset; ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
129 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
130 pic_num & max_pic_num; long -> long_pic_num) */
131 int long_ref; ///< 1->long term reference 0->short term reference
132 int ref_poc[2][2][32]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
133 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
134 int mbaff; ///< h264 1 -> MBAFF frame 0-> not MBAFF
135 int field_picture; ///< whether or not the picture was encoded in separate fields
136
137 int mb_var_sum; ///< sum of MB variance for current frame
138 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
139 uint16_t *mb_var; ///< Table for MB variances
140 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
141 uint8_t *mb_mean; ///< Table for MB luminance
142 int b_frame_score; /* */
143 struct MpegEncContext *owner2; ///< pointer to the MpegEncContext that allocated this picture
144 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
145 } Picture;
146
147 /**
148 * Motion estimation context.
149 */
150 typedef struct MotionEstContext{
151 AVCodecContext *avctx;
152 int skip; ///< set if ME is skipped for the current MB
153 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
154 int direct_basis_mv[4][2];
155 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
156 uint8_t *best_mb;
157 uint8_t *temp_mb[2];
158 uint8_t *temp;
159 int best_bits;
160 uint32_t *map; ///< map to avoid duplicate evaluations
161 uint32_t *score_map; ///< map to store the scores
162 unsigned map_generation;
163 int pre_penalty_factor;
164 int penalty_factor; /**< an estimate of the bits required to
165 code a given mv value, e.g. (1,0) takes
166 more bits than (0,0). We have to
167 estimate whether any reduction in
168 residual is worth the extra bits. */
169 int sub_penalty_factor;
170 int mb_penalty_factor;
171 int flags;
172 int sub_flags;
173 int mb_flags;
174 int pre_pass; ///< = 1 for the pre pass
175 int dia_size;
176 int xmin;
177 int xmax;
178 int ymin;
179 int ymax;
180 int pred_x;
181 int pred_y;
182 uint8_t *src[4][4];
183 uint8_t *ref[4][4];
184 int stride;
185 int uvstride;
186 /* temp variables for picture complexity calculation */
187 int mc_mb_var_sum_temp;
188 int mb_var_sum_temp;
189 int scene_change_score;
190 /* cmp, chroma_cmp;*/
191 op_pixels_func (*hpel_put)[4];
192 op_pixels_func (*hpel_avg)[4];
193 qpel_mc_func (*qpel_put)[16];
194 qpel_mc_func (*qpel_avg)[16];
195 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
196 uint8_t *current_mv_penalty;
197 int (*sub_motion_search)(struct MpegEncContext * s,
198 int *mx_ptr, int *my_ptr, int dmin,
199 int src_index, int ref_index,
200 int size, int h);
201 }MotionEstContext;
202
203 /**
204 * MpegEncContext.
205 */
206 typedef struct MpegEncContext {
207 AVClass *class;
208 struct AVCodecContext *avctx;
209 /* the following parameters must be initialized before encoding */
210 int width, height;///< picture size. must be a multiple of 16
211 int gop_size;
212 int intra_only; ///< if true, only intra pictures are generated
213 int bit_rate; ///< wanted bit rate
214 enum OutputFormat out_format; ///< output format
215 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
216 int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
217
218 /* the following codec id fields are deprecated in favor of codec_id */
219 int h263_plus; ///< h263 plus headers
220 int h263_flv; ///< use flv h263 header
221
222 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
223 int fixed_qscale; ///< fixed qscale if non zero
224 int encoding; ///< true if we are encoding (vs decoding)
225 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
226 int flags2; ///< AVCodecContext.flags2
227 int max_b_frames; ///< max number of b-frames for encoding
228 int luma_elim_threshold;
229 int chroma_elim_threshold;
230 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
231 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
232 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
233 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
234 /* the following fields are managed internally by the encoder */
235
236 /* sequence parameters */
237 int context_initialized;
238 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
239 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
240 int picture_number; //FIXME remove, unclear definition
241 int picture_in_gop_number; ///< 0-> first pic in gop, ...
242 int mb_width, mb_height; ///< number of MBs horizontally & vertically
243 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
244 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
245 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
246 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
247 int mb_num; ///< number of MBs of a picture
248 int linesize; ///< line size, in bytes, may be different from width
249 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
250 Picture *picture; ///< main picture buffer
251 Picture **input_picture; ///< next pictures on display order for encoding
252 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
253
254 int y_dc_scale, c_dc_scale;
255 int ac_pred;
256 int block_last_index[12]; ///< last non zero coefficient in block
257 int h263_aic; ///< Advanded INTRA Coding (AIC)
258
259 /* scantables */
260 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
261 ScanTable intra_scantable;
262 ScanTable intra_h_scantable;
263 ScanTable intra_v_scantable;
264
265 /* WARNING: changes above this line require updates to hardcoded
266 * offsets used in asm. */
267
268 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
269 /**
270 * pts difference between the first and second input frame, used for
271 * calculating dts of the first frame when there's a delay */
272 int64_t dts_delta;
273 /**
274 * reordered pts to be used as dts for the next output frame when there's
275 * a delay */
276 int64_t reordered_pts;
277
278 /** bit output */
279 PutBitContext pb;
280
281 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
282 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
283 struct MpegEncContext *thread_context[MAX_THREADS];
284 int slice_context_count; ///< number of used thread_contexts
285
286 /**
287 * copy of the previous picture structure.
288 * note, linesize & data, might not match the previous picture (for field pictures)
289 */
290 Picture last_picture;
291
292 /**
293 * copy of the next picture structure.
294 * note, linesize & data, might not match the next picture (for field pictures)
295 */
296 Picture next_picture;
297
298 /**
299 * copy of the source picture structure for encoding.
300 * note, linesize & data, might not match the source picture (for field pictures)
301 */
302 Picture new_picture;
303
304 /**
305 * copy of the current picture structure.
306 * note, linesize & data, might not match the current picture (for field pictures)
307 */
308 Picture current_picture; ///< buffer to store the decompressed current picture
309
310 Picture *last_picture_ptr; ///< pointer to the previous picture.
311 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
312 Picture *current_picture_ptr; ///< pointer to the current picture
313 int picture_count; ///< number of allocated pictures (MAX_PICTURE_COUNT * avctx->thread_count)
314 int picture_range_start, picture_range_end; ///< the part of picture that this context can allocate in
315 uint8_t *visualization_buffer[3]; ///< temporary buffer vor MV visualization
316 int last_dc[3]; ///< last DC values for MPEG1
317 int16_t *dc_val_base;
318 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
319 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
320 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
321 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
322 uint8_t *coded_block_base;
323 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
324 int16_t (*ac_val_base)[16];
325 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
326 int mb_skipped; ///< MUST BE SET only during DECODING
327 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
328 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
329 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
330 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
331 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
332 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
333 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
334 uint8_t *obmc_scratchpad;
335 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
336
337 int qscale; ///< QP
338 int chroma_qscale; ///< chroma QP
339 unsigned int lambda; ///< lagrange multipler used in rate distortion
340 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
341 int *lambda_table;
342 int adaptive_quant; ///< use adaptive quantization
343 int dquant; ///< qscale difference to prev qscale
344 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
345 int last_pict_type; //FIXME removes
346 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
347 int droppable;
348 int frame_rate_index;
349 int last_lambda_for[5]; ///< last lambda for a specific pict type
350 int skipdct; ///< skip dct and code zero residual
351
352 /* motion compensation */
353 int unrestricted_mv; ///< mv can point outside of the coded picture
354 int h263_long_vectors; ///< use horrible h263v1 long vector mode
355
356 DSPContext dsp; ///< pointers for accelerated dsp functions
357 VideoDSPContext vdsp;
358 int f_code; ///< forward MV resolution
359 int b_code; ///< backward MV resolution for B Frames (mpeg4)
360 int16_t (*p_mv_table_base)[2];
361 int16_t (*b_forw_mv_table_base)[2];
362 int16_t (*b_back_mv_table_base)[2];
363 int16_t (*b_bidir_forw_mv_table_base)[2];
364 int16_t (*b_bidir_back_mv_table_base)[2];
365 int16_t (*b_direct_mv_table_base)[2];
366 int16_t (*p_field_mv_table_base[2][2])[2];
367 int16_t (*b_field_mv_table_base[2][2][2])[2];
368 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
369 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
370 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
371 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
372 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
373 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
374 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
375 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
376 uint8_t (*p_field_select_table[2]);
377 uint8_t (*b_field_select_table[2][2]);
378 int me_method; ///< ME algorithm
379 int mv_dir;
380 #define MV_DIR_FORWARD 1
381 #define MV_DIR_BACKWARD 2
382 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
383 int mv_type;
384 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
385 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
386 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
387 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
388 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
389 /**motion vectors for a macroblock
390 first coordinate : 0 = forward 1 = backward
391 second " : depend on type
392 third " : 0 = x, 1 = y
393 */
394 int mv[2][4][2];
395 int field_select[2][2];
396 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
397 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
398 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
399
400 MotionEstContext me;
401
402 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
403 for b-frames rounding mode is always 0 */
404
405 /* macroblock layer */
406 int mb_x, mb_y;
407 int mb_skip_run;
408 int mb_intra;
409 uint16_t *mb_type; ///< Table for candidate MB types for encoding
410 #define CANDIDATE_MB_TYPE_INTRA 0x01
411 #define CANDIDATE_MB_TYPE_INTER 0x02
412 #define CANDIDATE_MB_TYPE_INTER4V 0x04
413 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
414 //#define MB_TYPE_GMC 0x10
415
416 #define CANDIDATE_MB_TYPE_DIRECT 0x10
417 #define CANDIDATE_MB_TYPE_FORWARD 0x20
418 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
419 #define CANDIDATE_MB_TYPE_BIDIR 0x80
420
421 #define CANDIDATE_MB_TYPE_INTER_I 0x100
422 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
423 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
424 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
425
426 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
427
428 int block_index[6]; ///< index to current MB in block based arrays with edges
429 int block_wrap[6];
430 uint8_t *dest[3];
431
432 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
433
434 /** matrix transmitted in the bitstream */
435 uint16_t intra_matrix[64];
436 uint16_t chroma_intra_matrix[64];
437 uint16_t inter_matrix[64];
438 uint16_t chroma_inter_matrix[64];
439 #define QUANT_BIAS_SHIFT 8
440 int intra_quant_bias; ///< bias for the quantizer
441 int inter_quant_bias; ///< bias for the quantizer
442 int min_qcoeff; ///< minimum encodable coefficient
443 int max_qcoeff; ///< maximum encodable coefficient
444 int ac_esc_length; ///< num of bits needed to encode the longest esc
445 uint8_t *intra_ac_vlc_length;
446 uint8_t *intra_ac_vlc_last_length;
447 uint8_t *inter_ac_vlc_length;
448 uint8_t *inter_ac_vlc_last_length;
449 uint8_t *luma_dc_vlc_length;
450 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
451
452 int coded_score[8];
453
454 /** precomputed matrix (combine qscale and DCT renorm) */
455 int (*q_intra_matrix)[64];
456 int (*q_inter_matrix)[64];
457 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
458 uint16_t (*q_intra_matrix16)[2][64];
459 uint16_t (*q_inter_matrix16)[2][64];
460
461 /* noise reduction */
462 int (*dct_error_sum)[64];
463 int dct_count[2];
464 uint16_t (*dct_offset)[64];
465
466 void *opaque; ///< private data for the user
467
468 /* bit rate control */
469 int64_t total_bits;
470 int frame_bits; ///< bits used for the current frame
471 int next_lambda; ///< next lambda used for retrying to encode a frame
472 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
473
474 /* statistics, used for 2-pass encoding */
475 int mv_bits;
476 int header_bits;
477 int i_tex_bits;
478 int p_tex_bits;
479 int i_count;
480 int f_count;
481 int b_count;
482 int skip_count;
483 int misc_bits; ///< cbp, mb_type
484 int last_bits; ///< temp var used for calculating the above vars
485
486 /* error concealment / resync */
487 int error_count, error_occurred;
488 uint8_t *error_status_table; ///< table of the error status of each MB
489 #define VP_START 1 ///< current MB is the first after a resync marker
490 #define ER_AC_ERROR 2
491 #define ER_DC_ERROR 4
492 #define ER_MV_ERROR 8
493 #define ER_AC_END 16
494 #define ER_DC_END 32
495 #define ER_MV_END 64
496
497 #define ER_MB_ERROR (ER_AC_ERROR|ER_DC_ERROR|ER_MV_ERROR)
498 #define ER_MB_END (ER_AC_END|ER_DC_END|ER_MV_END)
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 err_recognition;
506
507 ParseContext parse_context;
508
509 /* H.263 specific */
510 int gob_index;
511 int obmc; ///< overlapped block motion compensation
512 int showed_packed_warning; ///< flag for having shown the warning about divxs invalid b frames
513 int mb_info; ///< interval for outputting info about mb offsets as side data
514 int prev_mb_info, last_mb_info;
515 uint8_t *mb_info_ptr;
516 int mb_info_size;
517
518 /* H.263+ specific */
519 int umvplus; ///< == H263+ && unrestricted_mv
520 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
521 int h263_slice_structured;
522 int alt_inter_vlc; ///< alternative inter vlc
523 int modified_quant;
524 int loop_filter;
525 int custom_pcf;
526
527 /* mpeg4 specific */
528 int time_increment_bits; ///< number of bits to represent the fractional part of time
529 int last_time_base;
530 int time_base; ///< time in seconds of last I,P,S Frame
531 int64_t time; ///< time of current frame
532 int64_t last_non_b_time;
533 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
534 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
535 uint16_t pp_field_time;
536 uint16_t pb_field_time; ///< like above, just for interlaced
537 int shape;
538 int vol_sprite_usage;
539 int sprite_width;
540 int sprite_height;
541 int sprite_left;
542 int sprite_top;
543 int sprite_brightness_change;
544 int num_sprite_warping_points;
545 int real_sprite_warping_points;
546 uint16_t sprite_traj[4][2]; ///< sprite trajectory points
547 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
548 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
549 int sprite_shift[2]; ///< sprite shift [isChroma]
550 int mcsel;
551 int quant_precision;
552 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
553 int scalability;
554 int hierachy_type;
555 int enhancement_type;
556 int new_pred;
557 int reduced_res_vop;
558 int aspect_ratio_info; //FIXME remove
559 int sprite_warping_accuracy;
560 int low_latency_sprite;
561 int data_partitioning; ///< data partitioning flag from header
562 int partitioned_frame; ///< is current frame partitioned
563 int rvlc; ///< reversible vlc
564 int resync_marker; ///< could this stream contain resync markers
565 int low_delay; ///< no reordering needed / has no b-frames
566 int vo_type;
567 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
568 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
569 int use_intra_dc_vlc;
570 PutBitContext tex_pb; ///< used for data partitioned VOPs
571 PutBitContext pb2; ///< used for data partitioned VOPs
572 int mpeg_quant;
573 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
574 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
575 int cplx_estimation_trash_i;
576 int cplx_estimation_trash_p;
577 int cplx_estimation_trash_b;
578
579 /* divx specific, used to workaround (many) bugs in divx5 */
580 int divx_version;
581 int divx_build;
582 int divx_packed;
583 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
584 int bitstream_buffer_size;
585 unsigned int allocated_bitstream_buffer_size;
586
587 int xvid_build;
588
589 /* lavc specific stuff, used to workaround bugs in libavcodec */
590 int lavc_build;
591
592 /* RV10 specific */
593 int rv10_version; ///< RV10 version: 0 or 3
594 int rv10_first_dc_coded[3];
595 int orig_width, orig_height;
596
597 /* MJPEG specific */
598 struct MJpegContext *mjpeg_ctx;
599 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
600 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
601
602 /* MSMPEG4 specific */
603 int mv_table_index;
604 int rl_table_index;
605 int rl_chroma_table_index;
606 int dc_table_index;
607 int use_skip_mb_code;
608 int slice_height; ///< in macroblocks
609 int first_slice_line; ///< used in mpeg4 too to handle resync markers
610 int flipflop_rounding;
611 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
612 int per_mb_rl_table;
613 int esc3_level_length;
614 int esc3_run_length;
615 /** [mb_intra][isChroma][level][run][last] */
616 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
617 int inter_intra_pred;
618 int mspel;
619
620 /* decompression specific */
621 GetBitContext gb;
622
623 /* Mpeg1 specific */
624 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
625 int last_mv_dir; ///< last mv_dir, used for b frame encoding
626 int broken_link; ///< no_output_of_prior_pics_flag
627 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
628
629 /* MPEG-2-specific - I wished not to have to support this mess. */
630 int progressive_sequence;
631 int mpeg_f_code[2][2];
632 int picture_structure;
633 /* picture type */
634 #define PICT_TOP_FIELD 1
635 #define PICT_BOTTOM_FIELD 2
636 #define PICT_FRAME 3
637
638 int intra_dc_precision;
639 int frame_pred_frame_dct;
640 int top_field_first;
641 int concealment_motion_vectors;
642 int q_scale_type;
643 int intra_vlc_format;
644 int alternate_scan;
645 int repeat_first_field;
646 int chroma_420_type;
647 int chroma_format;
648 #define CHROMA_420 1
649 #define CHROMA_422 2
650 #define CHROMA_444 3
651 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
652 int chroma_y_shift;
653
654 int progressive_frame;
655 int full_pel[2];
656 int interlaced_dct;
657 int first_slice;
658 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
659 int drop_frame_timecode; ///< timecode is in drop frame format.
660 int scan_offset; ///< reserve space for SVCD scan offset user data.
661
662 /* RTP specific */
663 int rtp_mode;
664
665 uint8_t *ptr_lastgob;
666 int swap_uv; //vcr2 codec is an MPEG-2 variant with U and V swapped
667 int16_t (*pblocks[12])[64];
668
669 int16_t (*block)[64]; ///< points to one of the following blocks
670 int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
671 int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
672 #define SLICE_OK 0
673 #define SLICE_ERROR -1
674 #define SLICE_END -2 ///<end marker found
675 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
676
677 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
678 int16_t *block/*align 16*/, int n, int qscale);
679 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
680 int16_t *block/*align 16*/, int n, int qscale);
681 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
682 int16_t *block/*align 16*/, int n, int qscale);
683 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
684 int16_t *block/*align 16*/, int n, int qscale);
685 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
686 int16_t *block/*align 16*/, int n, int qscale);
687 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
688 int16_t *block/*align 16*/, int n, int qscale);
689 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
690 int16_t *block/*align 16*/, int n, int qscale);
691 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
692 int16_t *block/*align 16*/, int n, int qscale);
693 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
694 int16_t *block/*align 16*/, int n, int qscale);
695 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
696 int16_t *block/*align 16*/, int n, int qscale);
697 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
698 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
699 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
700
701 int mpv_flags; ///< flags set by private options
702 int quantizer_noise_shaping;
703
704 /* error resilience stuff */
705 uint8_t *er_temp_buffer;
706
707 /* temp buffers for rate control */
708 float *cplx_tab, *bits_tab;
709
710 /* flag to indicate a reinitialization is required, e.g. after
711 * a frame size change */
712 int context_reinit;
713 } MpegEncContext;
714
715 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
716 ((pic && pic >= old_ctx->picture && \
717 pic < old_ctx->picture + old_ctx->picture_count) ? \
718 &new_ctx->picture[pic - old_ctx->picture] : NULL)
719
720 /* mpegvideo_enc common options */
721 #define FF_MPV_FLAG_SKIP_RD 0x0001
722 #define FF_MPV_FLAG_STRICT_GOP 0x0002
723 #define FF_MPV_FLAG_QP_RD 0x0004
724 #define FF_MPV_FLAG_CBP_RD 0x0008
725
726 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
727 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
728 #define FF_MPV_COMMON_OPTS \
729 { "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" },\
730 { "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" },\
731 { "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" },\
732 { "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" },\
733 { "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" },\
734 { "luma_elim_threshold", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
735 FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
736 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
737 FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
738 { "quantizer_noise_shaping", NULL, FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FF_MPV_OPT_FLAGS },
739
740 extern const AVOption ff_mpv_generic_options[];
741
742 #define FF_MPV_GENERIC_CLASS(name) \
743 static const AVClass name ## _class = {\
744 .class_name = #name " encoder",\
745 .item_name = av_default_item_name,\
746 .option = ff_mpv_generic_options,\
747 .version = LIBAVUTIL_VERSION_INT,\
748 };
749
750 /**
751 * Set the given MpegEncContext to common defaults (same for encoding
752 * and decoding). The changed fields will not depend upon the prior
753 * state of the MpegEncContext.
754 */
755 void ff_MPV_common_defaults(MpegEncContext *s);
756
757 void ff_MPV_decode_defaults(MpegEncContext *s);
758 int ff_MPV_common_init(MpegEncContext *s);
759 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
760 int ff_MPV_common_frame_size_change(MpegEncContext *s);
761 void ff_MPV_common_end(MpegEncContext *s);
762 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
763 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
764 void ff_MPV_frame_end(MpegEncContext *s);
765 int ff_MPV_encode_init(AVCodecContext *avctx);
766 int ff_MPV_encode_end(AVCodecContext *avctx);
767 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
768 const AVFrame *frame, int *got_packet);
769 void ff_MPV_encode_init_x86(MpegEncContext *s);
770 void ff_MPV_common_init_x86(MpegEncContext *s);
771 void ff_MPV_common_init_axp(MpegEncContext *s);
772 void ff_MPV_common_init_arm(MpegEncContext *s);
773 void ff_MPV_common_init_altivec(MpegEncContext *s);
774 void ff_MPV_common_init_bfin(MpegEncContext *s);
775 void ff_clean_intra_table_entries(MpegEncContext *s);
776 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
777 void ff_mpeg_flush(AVCodecContext *avctx);
778 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
779 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
780 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
781 int ff_find_unused_picture(MpegEncContext *s, int shared);
782 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
783 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
784 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
785 void ff_MPV_report_decode_progress(MpegEncContext *s);
786 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
787 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
788 void ff_set_qscale(MpegEncContext * s, int qscale);
789
790 void ff_er_frame_start(MpegEncContext *s);
791 void ff_er_frame_end(MpegEncContext *s);
792 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
793
794 int ff_dct_common_init(MpegEncContext *s);
795 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
796 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
797 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
798
799 void ff_init_block_index(MpegEncContext *s);
800 void ff_copy_picture(Picture *dst, Picture *src);
801
802 void ff_MPV_motion(MpegEncContext *s,
803 uint8_t *dest_y, uint8_t *dest_cb,
804 uint8_t *dest_cr, int dir,
805 uint8_t **ref_picture,
806 op_pixels_func (*pix_op)[4],
807 qpel_mc_func (*qpix_op)[16]);
808
809 /**
810 * Allocate a Picture.
811 * The pixels are allocated/set by calling get_buffer() if shared = 0.
812 */
813 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
814
815 extern const enum AVPixelFormat ff_pixfmt_list_420[];
816 extern const enum AVPixelFormat ff_hwaccel_pixfmt_list_420[];
817
818 /**
819 * permute block according to permuatation.
820 * @param last last non zero element in scantable order
821 */
822 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
823
824 static inline void ff_update_block_index(MpegEncContext *s){
825 const int block_size = 8;
826
827 s->block_index[0]+=2;
828 s->block_index[1]+=2;
829 s->block_index[2]+=2;
830 s->block_index[3]+=2;
831 s->block_index[4]++;
832 s->block_index[5]++;
833 s->dest[0]+= 2*block_size;
834 s->dest[1]+= block_size;
835 s->dest[2]+= block_size;
836 }
837
838 static inline int get_bits_diff(MpegEncContext *s){
839 const int bits= put_bits_count(&s->pb);
840 const int last= s->last_bits;
841
842 s->last_bits = bits;
843
844 return bits - last;
845 }
846
847 static inline int ff_h263_round_chroma(int x){
848 static const uint8_t h263_chroma_roundtab[16] = {
849 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
850 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
851 };
852 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
853 }
854
855 /* motion_est.c */
856 void ff_estimate_p_frame_motion(MpegEncContext * s,
857 int mb_x, int mb_y);
858 void ff_estimate_b_frame_motion(MpegEncContext * s,
859 int mb_x, int mb_y);
860 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
861 void ff_fix_long_p_mvs(MpegEncContext * s);
862 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
863 int16_t (*mv_table)[2], int f_code, int type, int truncate);
864 int ff_init_me(MpegEncContext *s);
865 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
866 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
867 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
868 int ref_mv_scale, int size, int h);
869 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
870 int ref_index, int size, int h, int add_rate);
871
872 /* mpeg12.c */
873 extern const uint8_t ff_mpeg1_dc_scale_table[128];
874 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
875
876 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
877 void ff_mpeg1_encode_mb(MpegEncContext *s,
878 int16_t block[6][64],
879 int motion_x, int motion_y);
880 void ff_mpeg1_encode_init(MpegEncContext *s);
881 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
882 void ff_mpeg1_clean_buffers(MpegEncContext *s);
883 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
884
885 extern const uint8_t ff_aic_dc_scale_table[32];
886 extern const uint8_t ff_h263_chroma_qscale_table[32];
887 extern const uint8_t ff_h263_loop_filter_strength[32];
888
889 /* h261.c */
890 void ff_h261_loop_filter(MpegEncContext *s);
891 void ff_h261_reorder_mb_index(MpegEncContext* s);
892 void ff_h261_encode_mb(MpegEncContext *s,
893 int16_t block[6][64],
894 int motion_x, int motion_y);
895 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
896 void ff_h261_encode_init(MpegEncContext *s);
897 int ff_h261_get_picture_format(int width, int height);
898
899
900 /* rv10.c */
901 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
902 int ff_rv_decode_dc(MpegEncContext *s, int n);
903 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
904
905
906 /* msmpeg4.c */
907 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
908 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
909 void ff_msmpeg4_encode_mb(MpegEncContext * s,
910 int16_t block[6][64],
911 int motion_x, int motion_y);
912 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
913 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
914 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
915 void ff_msmpeg4_encode_init(MpegEncContext *s);
916 int ff_wmv2_decode_picture_header(MpegEncContext * s);
917 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
918 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
919 void ff_mspel_motion(MpegEncContext *s,
920 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
921 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
922 int motion_x, int motion_y, int h);
923 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
924 void ff_wmv2_encode_mb(MpegEncContext * s,
925 int16_t block[6][64],
926 int motion_x, int motion_y);
927
928 #endif /* AVCODEC_MPEGVIDEO_H */