FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpegvideo.h
Date: 2022-07-06 18:02:43
Exec Total Coverage
Lines: 13 13 100.0%
Branches: 2 2 100.0%

Line Branch Exec Source
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
25 * mpegvideo header.
26 */
27
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
30
31 #include "avcodec.h"
32 #include "blockdsp.h"
33 #include "error_resilience.h"
34 #include "fdctdsp.h"
35 #include "get_bits.h"
36 #include "h264chroma.h"
37 #include "h263dsp.h"
38 #include "hpeldsp.h"
39 #include "idctdsp.h"
40 #include "me_cmp.h"
41 #include "motion_est.h"
42 #include "mpegpicture.h"
43 #include "mpegvideodsp.h"
44 #include "mpegvideoencdsp.h"
45 #include "pixblockdsp.h"
46 #include "put_bits.h"
47 #include "ratecontrol.h"
48 #if FF_API_FLAG_TRUNCATED
49 #include "parser.h"
50 #endif
51 #include "mpegutils.h"
52 #include "qpeldsp.h"
53 #include "videodsp.h"
54
55 #define MAX_THREADS 32
56
57 #define MAX_B_FRAMES 16
58
59 /**
60 * MpegEncContext.
61 */
62 typedef struct MpegEncContext {
63 AVClass *class;
64
65 int y_dc_scale, c_dc_scale;
66 int ac_pred;
67 int block_last_index[12]; ///< last non zero coefficient in block
68 int h263_aic; ///< Advanced INTRA Coding (AIC)
69
70 /* scantables */
71 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage
72 ScanTable intra_scantable;
73 ScanTable intra_h_scantable;
74 ScanTable intra_v_scantable;
75
76 /* WARNING: changes above this line require updates to hardcoded
77 * offsets used in ASM. */
78
79 struct AVCodecContext *avctx;
80 /* The following pointer is intended for codecs sharing code
81 * between decoder and encoder and in need of a common context to do so. */
82 void *private_ctx;
83 /* the following parameters must be initialized before encoding */
84 int width, height;///< picture size. must be a multiple of 16
85 int gop_size;
86 int intra_only; ///< if true, only intra pictures are generated
87 int64_t bit_rate; ///< wanted bit rate
88 enum OutputFormat out_format; ///< output format
89 int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions
90 int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved)
91
92 /* the following codec id fields are deprecated in favor of codec_id */
93 int h263_plus; ///< H.263+ headers
94 int h263_flv; ///< use flv H.263 header
95
96 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
97 int fixed_qscale; ///< fixed qscale if non zero
98 int encoding; ///< true if we are encoding (vs decoding)
99 int max_b_frames; ///< max number of B-frames for encoding
100 int luma_elim_threshold;
101 int chroma_elim_threshold;
102 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
103 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
104 /* the following fields are managed internally by the encoder */
105
106 /* sequence parameters */
107 int context_initialized;
108 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
109 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
110 int picture_number; //FIXME remove, unclear definition
111 int picture_in_gop_number; ///< 0-> first pic in gop, ...
112 int mb_width, mb_height; ///< number of MBs horizontally & vertically
113 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
114 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
115 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
116 int mb_num; ///< number of MBs of a picture
117 ptrdiff_t linesize; ///< line size, in bytes, may be different from width
118 ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
119 Picture *picture; ///< main picture buffer
120 Picture **input_picture; ///< next pictures on display order for encoding
121 Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding
122
123 int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_send_frame()
124 /**
125 * pts difference between the first and second input frame, used for
126 * calculating dts of the first frame when there's a delay */
127 int64_t dts_delta;
128 /**
129 * reordered pts to be used as dts for the next output frame when there's
130 * a delay */
131 int64_t reordered_pts;
132
133 /** bit output */
134 PutBitContext pb;
135
136 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
137 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
138 struct MpegEncContext *thread_context[MAX_THREADS];
139 int slice_context_count; ///< number of used thread_contexts
140
141 /**
142 * copy of the previous picture structure.
143 * note, linesize & data, might not match the previous picture (for field pictures)
144 */
145 Picture last_picture;
146
147 /**
148 * copy of the next picture structure.
149 * note, linesize & data, might not match the next picture (for field pictures)
150 */
151 Picture next_picture;
152
153 /**
154 * Reference to the source picture for encoding.
155 * note, linesize & data, might not match the source picture (for field pictures)
156 */
157 AVFrame *new_picture;
158
159 /**
160 * copy of the current picture structure.
161 * note, linesize & data, might not match the current picture (for field pictures)
162 */
163 Picture current_picture; ///< buffer to store the decompressed current picture
164
165 Picture *last_picture_ptr; ///< pointer to the previous picture.
166 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
167 Picture *current_picture_ptr; ///< pointer to the current picture
168 int last_dc[3]; ///< last DC values for MPEG-1
169 int16_t *dc_val_base;
170 int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous
171 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
172 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
173 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263)
174 uint8_t *coded_block_base;
175 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
176 int16_t (*ac_val_base)[16];
177 int16_t (*ac_val[3])[16]; ///< used for MPEG-4 AC prediction, all 3 arrays must be continuous
178 int mb_skipped; ///< MUST BE SET only during DECODING
179 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
180 and used for B-frame encoding & decoding (contains skip table of next P-frame) */
181 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
182 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
183 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
184
185 ScratchpadContext sc;
186
187 int qscale; ///< QP
188 int chroma_qscale; ///< chroma QP
189 unsigned int lambda; ///< Lagrange multiplier used in rate distortion
190 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
191 int *lambda_table;
192 int adaptive_quant; ///< use adaptive quantization
193 int dquant; ///< qscale difference to prev qscale
194 int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
195 int vbv_delay;
196 int last_pict_type; //FIXME removes
197 int last_non_b_pict_type; ///< used for MPEG-4 gmc B-frames & ratecontrol
198 int droppable;
199 int last_lambda_for[5]; ///< last lambda for a specific pict type
200 int skipdct; ///< skip dct and code zero residual
201
202 /* motion compensation */
203 int unrestricted_mv; ///< mv can point outside of the coded picture
204 int h263_long_vectors; ///< use horrible H.263v1 long vector mode
205
206 BlockDSPContext bdsp;
207 FDCTDSPContext fdsp;
208 H264ChromaContext h264chroma;
209 HpelDSPContext hdsp;
210 IDCTDSPContext idsp;
211 MECmpContext mecc;
212 MpegVideoDSPContext mdsp;
213 MpegvideoEncDSPContext mpvencdsp;
214 PixblockDSPContext pdsp;
215 QpelDSPContext qdsp;
216 VideoDSPContext vdsp;
217 H263DSPContext h263dsp;
218 int f_code; ///< forward MV resolution
219 int b_code; ///< backward MV resolution for B-frames (MPEG-4)
220 int16_t (*p_mv_table_base)[2];
221 int16_t (*b_forw_mv_table_base)[2];
222 int16_t (*b_back_mv_table_base)[2];
223 int16_t (*b_bidir_forw_mv_table_base)[2];
224 int16_t (*b_bidir_back_mv_table_base)[2];
225 int16_t (*b_direct_mv_table_base)[2];
226 int16_t (*p_field_mv_table_base)[2];
227 int16_t (*b_field_mv_table_base)[2];
228 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) P-frame encoding
229 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode B-frame encoding
230 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode B-frame encoding
231 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
232 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
233 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode B-frame encoding
234 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding
235 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding
236 uint8_t (*p_field_select_table[2]); ///< Only the first element is allocated
237 uint8_t (*b_field_select_table[2][2]); ///< Only the first element is allocated
238 int motion_est; ///< ME algorithm
239 int me_penalty_compensation;
240 int me_pre; ///< prepass for motion estimation
241 int mv_dir;
242 #define MV_DIR_FORWARD 1
243 #define MV_DIR_BACKWARD 2
244 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4)
245 int mv_type;
246 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
247 #define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV)
248 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
249 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
250 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
251 /**motion vectors for a macroblock
252 first coordinate : 0 = forward 1 = backward
253 second " : depend on type
254 third " : 0 = x, 1 = y
255 */
256 int mv[2][4][2];
257 int field_select[2][2];
258 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
259 const uint8_t *fcode_tab; ///< smallest fcode needed for each MV
260 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
261
262 MotionEstContext me;
263
264 int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)
265 for B-frames rounding mode is always 0 */
266
267 /* macroblock layer */
268 int mb_x, mb_y;
269 int mb_skip_run;
270 int mb_intra;
271 uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h)
272
273 int block_index[6]; ///< index to current MB in block based arrays with edges
274 int block_wrap[6];
275 uint8_t *dest[3];
276
277 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
278
279 /** matrix transmitted in the bitstream */
280 uint16_t intra_matrix[64];
281 uint16_t chroma_intra_matrix[64];
282 uint16_t inter_matrix[64];
283 uint16_t chroma_inter_matrix[64];
284
285 int intra_quant_bias; ///< bias for the quantizer
286 int inter_quant_bias; ///< bias for the quantizer
287 int min_qcoeff; ///< minimum encodable coefficient
288 int max_qcoeff; ///< maximum encodable coefficient
289 int ac_esc_length; ///< num of bits needed to encode the longest esc
290 uint8_t *intra_ac_vlc_length;
291 uint8_t *intra_ac_vlc_last_length;
292 uint8_t *intra_chroma_ac_vlc_length;
293 uint8_t *intra_chroma_ac_vlc_last_length;
294 uint8_t *inter_ac_vlc_length;
295 uint8_t *inter_ac_vlc_last_length;
296 uint8_t *luma_dc_vlc_length;
297
298 int coded_score[12];
299
300 /** precomputed matrix (combine qscale and DCT renorm) */
301 int (*q_intra_matrix)[64];
302 int (*q_chroma_intra_matrix)[64];
303 int (*q_inter_matrix)[64];
304 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
305 uint16_t (*q_intra_matrix16)[2][64];
306 uint16_t (*q_chroma_intra_matrix16)[2][64];
307 uint16_t (*q_inter_matrix16)[2][64];
308
309 /* noise reduction */
310 int (*dct_error_sum)[64];
311 int dct_count[2];
312 uint16_t (*dct_offset)[64];
313
314 /* bit rate control */
315 int64_t total_bits;
316 int frame_bits; ///< bits used for the current frame
317 int stuffing_bits; ///< bits used for stuffing
318 int next_lambda; ///< next lambda used for retrying to encode a frame
319 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
320
321 /* statistics, used for 2-pass encoding */
322 int mv_bits;
323 int header_bits;
324 int i_tex_bits;
325 int p_tex_bits;
326 int i_count;
327 int skip_count;
328 int misc_bits; ///< cbp, mb_type
329 int last_bits; ///< temp var used for calculating the above vars
330
331 /* error concealment / resync */
332 int resync_mb_x; ///< x position of last resync marker
333 int resync_mb_y; ///< y position of last resync marker
334 GetBitContext last_resync_gb; ///< used to search for the next resync marker
335 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
336
337 #if FF_API_FLAG_TRUNCATED
338 ParseContext parse_context;
339 #endif
340
341 /* H.263 specific */
342 int gob_index;
343 int obmc; ///< overlapped block motion compensation
344 int mb_info; ///< interval for outputting info about mb offsets as side data
345 int prev_mb_info, last_mb_info;
346 uint8_t *mb_info_ptr;
347 int mb_info_size;
348 int ehc_mode;
349
350 /* H.263+ specific */
351 int umvplus; ///< == H.263+ && unrestricted_mv
352 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
353 int h263_slice_structured;
354 int alt_inter_vlc; ///< alternative inter vlc
355 int modified_quant;
356 int loop_filter;
357 int custom_pcf;
358
359 /* MPEG-4 specific */
360 int studio_profile;
361 int dct_precision;
362 ///< number of bits to represent the fractional part of time (encoder only)
363 int time_increment_bits;
364 int last_time_base;
365 int time_base; ///< time in seconds of last I,P,S Frame
366 int64_t time; ///< time of current frame
367 int64_t last_non_b_time;
368 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
369 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
370 uint16_t pp_field_time;
371 uint16_t pb_field_time; ///< like above, just for interlaced
372 int real_sprite_warping_points;
373 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
374 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
375 int mcsel;
376 int quant_precision;
377 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
378 int sprite_warping_accuracy;
379 int data_partitioning; ///< data partitioning flag from header
380 int partitioned_frame; ///< is current frame partitioned
381 int low_delay; ///< no reordering needed / has no B-frames
382 PutBitContext tex_pb; ///< used for data partitioned VOPs
383 PutBitContext pb2; ///< used for data partitioned VOPs
384 int mpeg_quant;
385 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG-4
386
387 /* divx specific, used to workaround (many) bugs in divx5 */
388 int divx_packed;
389 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
390 int bitstream_buffer_size;
391 unsigned int allocated_bitstream_buffer_size;
392
393 /* RV10 specific */
394 int rv10_version; ///< RV10 version: 0 or 3
395 int rv10_first_dc_coded[3];
396
397 /* MJPEG specific */
398 struct MJpegContext *mjpeg_ctx;
399 int esc_pos;
400
401 /* MSMPEG4 specific */
402 int mv_table_index;
403 int rl_table_index;
404 int rl_chroma_table_index;
405 int dc_table_index;
406 int use_skip_mb_code;
407 int slice_height; ///< in macroblocks
408 int first_slice_line; ///< used in MPEG-4 too to handle resync markers
409 int flipflop_rounding;
410 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
411 int per_mb_rl_table;
412 int esc3_level_length;
413 int esc3_run_length;
414 int inter_intra_pred;
415 int mspel;
416
417 /* decompression specific */
418 GetBitContext gb;
419
420 /* MPEG-1 specific */
421 int last_mv_dir; ///< last mv_dir, used for B-frame encoding
422 int vbv_delay_pos; ///< offset of vbv_delay in the bitstream
423
424 /* MPEG-2-specific - I wished not to have to support this mess. */
425 int progressive_sequence;
426 int mpeg_f_code[2][2];
427
428 // picture structure defines are loaded from mpegutils.h
429 int picture_structure;
430
431 int intra_dc_precision;
432 int frame_pred_frame_dct;
433 int top_field_first;
434 int concealment_motion_vectors;
435 int q_scale_type;
436 int brd_scale;
437 int intra_vlc_format;
438 int alternate_scan;
439 #define VIDEO_FORMAT_COMPONENT 0
440 #define VIDEO_FORMAT_PAL 1
441 #define VIDEO_FORMAT_NTSC 2
442 #define VIDEO_FORMAT_SECAM 3
443 #define VIDEO_FORMAT_MAC 4
444 #define VIDEO_FORMAT_UNSPECIFIED 5
445 int repeat_first_field;
446 int chroma_420_type;
447 int chroma_format;
448 #define CHROMA_420 1
449 #define CHROMA_422 2
450 #define CHROMA_444 3
451 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
452 int chroma_y_shift;
453
454 int progressive_frame;
455 int full_pel[2];
456 int interlaced_dct;
457 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
458
459 /* RTP specific */
460 int rtp_mode;
461 int rtp_payload_size;
462
463 uint8_t *ptr_lastgob;
464 int16_t (*pblocks[12])[64];
465
466 int16_t (*block)[64]; ///< points to one of the following blocks
467 int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
468 int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch()
469
470 #define SLICE_OK 0
471 #define SLICE_ERROR -1
472 #define SLICE_END -2 ///<end marker found
473 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
474
475 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
476 int16_t *block/*align 16*/, int n, int qscale);
477 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
478 int16_t *block/*align 16*/, int n, int qscale);
479 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
480 int16_t *block/*align 16*/, int n, int qscale);
481 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
482 int16_t *block/*align 16*/, int n, int qscale);
483 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
484 int16_t *block/*align 16*/, int n, int qscale);
485 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
486 int16_t *block/*align 16*/, int n, int qscale);
487 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
488 int16_t *block/*align 16*/, int n, int qscale);
489 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
490 int16_t *block/*align 16*/, int n, int qscale);
491 int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
492 int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
493 void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
494
495 int mpv_flags; ///< flags set by private options
496 int quantizer_noise_shaping;
497
498 /**
499 * ratecontrol qmin qmax limiting method
500 * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.
501 */
502 float rc_qsquish;
503 float rc_qmod_amp;
504 int rc_qmod_freq;
505 float rc_initial_cplx;
506 float rc_buffer_aggressivity;
507 float border_masking;
508 int lmin, lmax;
509 int vbv_ignore_qmax;
510
511 char *rc_eq;
512
513 /* temp buffers for rate control */
514 float *cplx_tab, *bits_tab;
515
516 /* flag to indicate a reinitialization is required, e.g. after
517 * a frame size change */
518 int context_reinit;
519
520 ERContext er;
521
522 int error_rate;
523
524 /* temporary frames used by b_frame_strategy = 2 */
525 AVFrame *tmp_frames[MAX_B_FRAMES + 2];
526 int b_frame_strategy;
527 int b_sensitivity;
528
529 /* frame skip options for encoding */
530 int frame_skip_threshold;
531 int frame_skip_factor;
532 int frame_skip_exp;
533 int frame_skip_cmp;
534
535 int scenechange_threshold;
536 int noise_reduction;
537
538 int intra_penalty;
539 } MpegEncContext;
540
541
542 /**
543 * Set the given MpegEncContext to common defaults (same for encoding
544 * and decoding). The changed fields will not depend upon the prior
545 * state of the MpegEncContext.
546 */
547 void ff_mpv_common_defaults(MpegEncContext *s);
548
549 int ff_mpv_common_init(MpegEncContext *s);
550 void ff_mpv_common_init_arm(MpegEncContext *s);
551 void ff_mpv_common_init_axp(MpegEncContext *s);
552 void ff_mpv_common_init_neon(MpegEncContext *s);
553 void ff_mpv_common_init_ppc(MpegEncContext *s);
554 void ff_mpv_common_init_x86(MpegEncContext *s);
555 void ff_mpv_common_init_mips(MpegEncContext *s);
556 /**
557 * Initialize an MpegEncContext's thread contexts. Presumes that
558 * slice_context_count is already set and that all the fields
559 * that are freed/reset in free_duplicate_context() are NULL.
560 */
561 int ff_mpv_init_duplicate_contexts(MpegEncContext *s);
562 /**
563 * Initialize and allocates MpegEncContext fields dependent on the resolution.
564 */
565 int ff_mpv_init_context_frame(MpegEncContext *s);
566 /**
567 * Frees and resets MpegEncContext fields depending on the resolution
568 * as well as the slice thread contexts.
569 * Is used during resolution changes to avoid a full reinitialization of the
570 * codec.
571 */
572 void ff_mpv_free_context_frame(MpegEncContext *s);
573
574 void ff_mpv_common_end(MpegEncContext *s);
575
576 void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]);
577
578 void ff_clean_intra_table_entries(MpegEncContext *s);
579
580 int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src);
581 void ff_set_qscale(MpegEncContext * s, int qscale);
582
583 void ff_mpv_idct_init(MpegEncContext *s);
584 void ff_init_block_index(MpegEncContext *s);
585
586 void ff_mpv_motion(MpegEncContext *s,
587 uint8_t *dest_y, uint8_t *dest_cb,
588 uint8_t *dest_cr, int dir,
589 uint8_t **ref_picture,
590 op_pixels_func (*pix_op)[4],
591 qpel_mc_func (*qpix_op)[16]);
592
593 6711221 static inline void ff_update_block_index(MpegEncContext *s){
594
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6711221 const int bytes_per_pixel = 1 + (s->avctx->bits_per_raw_sample > 8);
595 6711221 const int block_size= (8*bytes_per_pixel) >> s->avctx->lowres;
596
597 6711221 s->block_index[0]+=2;
598 6711221 s->block_index[1]+=2;
599 6711221 s->block_index[2]+=2;
600 6711221 s->block_index[3]+=2;
601 6711221 s->block_index[4]++;
602 6711221 s->block_index[5]++;
603 6711221 s->dest[0]+= 2*block_size;
604 6711221 s->dest[1]+= (2 >> s->chroma_x_shift) * block_size;
605 6711221 s->dest[2]+= (2 >> s->chroma_x_shift) * block_size;
606 6711221 }
607
608 #endif /* AVCODEC_MPEGVIDEO_H */
609