FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/h264dec.h
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 2 2 100.0%
Functions: 1 1 100.0%
Branches: 0 0 -%

Line Branch Exec Source
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * H.264 / AVC / MPEG-4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #ifndef AVCODEC_H264DEC_H
29 #define AVCODEC_H264DEC_H
30
31 #include "libavutil/buffer.h"
32 #include "libavutil/mem_internal.h"
33
34 #include "cabac.h"
35 #include "error_resilience.h"
36 #include "h264_parse.h"
37 #include "h264_ps.h"
38 #include "h264_sei.h"
39 #include "h2645_parse.h"
40 #include "h264chroma.h"
41 #include "h264dsp.h"
42 #include "h264pred.h"
43 #include "h264qpel.h"
44 #include "h274.h"
45 #include "mpegutils.h"
46 #include "threadframe.h"
47 #include "videodsp.h"
48
49 #define H264_MAX_PICTURE_COUNT 36
50
51 /* Compiling in interlaced support reduces the speed
52 * of progressive decoding by about 2%. */
53 #define ALLOW_INTERLACE
54
55 #define FMO 0
56
57 /**
58 * The maximum number of slices supported by the decoder.
59 * must be a power of 2
60 */
61 #define MAX_SLICES 32
62
63 #ifdef ALLOW_INTERLACE
64 #define MB_MBAFF(h) (h)->mb_mbaff
65 #define MB_FIELD(sl) (sl)->mb_field_decoding_flag
66 #define FRAME_MBAFF(h) (h)->mb_aff_frame
67 #define FIELD_PICTURE(h) ((h)->picture_structure != PICT_FRAME)
68 #define LEFT_MBS 2
69 #define LTOP 0
70 #define LBOT 1
71 #define LEFT(i) (i)
72 #else
73 #define MB_MBAFF(h) 0
74 #define MB_FIELD(sl) 0
75 #define FRAME_MBAFF(h) 0
76 #define FIELD_PICTURE(h) 0
77 #undef IS_INTERLACED
78 #define IS_INTERLACED(mb_type) 0
79 #define LEFT_MBS 1
80 #define LTOP 0
81 #define LBOT 0
82 #define LEFT(i) 0
83 #endif
84 #define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h))
85
86 #ifndef CABAC
87 #define CABAC(h) (h)->ps.pps->cabac
88 #endif
89
90 #define CHROMA(h) ((h)->ps.sps->chroma_format_idc)
91 #define CHROMA422(h) ((h)->ps.sps->chroma_format_idc == 2)
92 #define CHROMA444(h) ((h)->ps.sps->chroma_format_idc == 3)
93
94 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
95 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
96
97 /**
98 * Memory management control operation.
99 */
100 typedef struct MMCO {
101 MMCOOpcode opcode;
102 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
103 int long_arg; ///< index, pic_num, or num long refs depending on opcode
104 } MMCO;
105
106 typedef struct H264Picture {
107 AVFrame *f;
108 ThreadFrame tf;
109
110 AVFrame *f_grain;
111
112 int8_t *qscale_table_base; ///< RefStruct reference
113 int8_t *qscale_table;
114
115 int16_t (*motion_val_base[2])[2]; ///< RefStruct reference
116 int16_t (*motion_val[2])[2];
117
118 uint32_t *mb_type_base; ///< RefStruct reference
119 uint32_t *mb_type;
120
121 /// RefStruct reference for hardware accelerator private data
122 void *hwaccel_picture_private;
123
124 int8_t *ref_index[2]; ///< RefStruct reference
125
126 int field_poc[2]; ///< top/bottom POC
127 int poc; ///< frame POC
128 int frame_num; ///< frame_num (raw frame_num from slice header)
129 int mmco_reset; /**< MMCO_RESET set this 1. Reordering code must
130 not mix pictures before and after MMCO_RESET. */
131 int pic_id; /**< pic_num (short -> no wrap version of pic_num,
132 pic_num & max_pic_num; long -> long_pic_num) */
133 int long_ref; ///< 1->long term reference 0->short term reference
134 int ref_poc[2][2][32]; ///< POCs of the frames/fields used as reference (FIXME need per slice)
135 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
136 int mbaff; ///< 1 -> MBAFF frame 0-> not MBAFF
137 int field_picture; ///< whether or not picture was encoded in separate fields
138
139 /**
140 * H264Picture.reference has this flag set,
141 * when the picture is held for delayed output.
142 */
143 #define DELAYED_PIC_REF (1 << 2)
144 int reference;
145 int recovered; ///< picture at IDR or recovery point + recovery count
146 int invalid_gap;
147 int sei_recovery_frame_cnt;
148 int needs_fg; ///< whether picture needs film grain synthesis (see `f_grain`)
149
150 const PPS *pps;
151
152 int mb_width, mb_height;
153 int mb_stride;
154
155 /// RefStruct reference; its pointee is shared between decoding threads.
156 atomic_int *decode_error_flags;
157
158 int gray;
159 } H264Picture;
160
161 typedef struct H264Ref {
162 uint8_t *data[3];
163 int linesize[3];
164
165 int reference;
166 int poc;
167 int pic_id;
168
169 const H264Picture *parent;
170 } H264Ref;
171
172 typedef struct H264SliceContext {
173 const struct H264Context *h264;
174 GetBitContext gb;
175 ERContext *er;
176
177 int slice_num;
178 int slice_type;
179 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
180 int slice_type_fixed;
181
182 int qscale;
183 int chroma_qp[2]; // QPc
184 int qp_thresh; ///< QP threshold to skip loopfilter
185 int last_qscale_diff;
186
187 // deblock
188 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
189 int slice_alpha_c0_offset;
190 int slice_beta_offset;
191
192 H264PredWeightTable pwt;
193
194 int prev_mb_skipped;
195 int next_mb_skipped;
196
197 int chroma_pred_mode;
198 int intra16x16_pred_mode;
199
200 int8_t intra4x4_pred_mode_cache[5 * 8];
201 int8_t(*intra4x4_pred_mode);
202
203 int topleft_mb_xy;
204 int top_mb_xy;
205 int topright_mb_xy;
206 int left_mb_xy[LEFT_MBS];
207
208 int topleft_type;
209 int top_type;
210 int topright_type;
211 int left_type[LEFT_MBS];
212
213 const uint8_t *left_block;
214 int topleft_partition;
215
216 unsigned int topleft_samples_available;
217 unsigned int top_samples_available;
218 unsigned int topright_samples_available;
219 unsigned int left_samples_available;
220
221 ptrdiff_t linesize, uvlinesize;
222 ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
223 ptrdiff_t mb_uvlinesize;
224
225 int mb_x, mb_y;
226 int mb_xy;
227 int resync_mb_x;
228 int resync_mb_y;
229 unsigned int first_mb_addr;
230 // index of the first MB of the next slice
231 int next_slice_idx;
232 int mb_skip_run;
233 int is_complex;
234
235 int picture_structure;
236 int mb_field_decoding_flag;
237 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
238
239 int redundant_pic_count;
240
241 /**
242 * number of neighbors (top and/or left) that used 8x8 dct
243 */
244 int neighbor_transform_size;
245
246 int direct_spatial_mv_pred;
247 int col_parity;
248 int col_fieldoff;
249
250 int cbp;
251 int top_cbp;
252 int left_cbp;
253
254 int dist_scale_factor[32];
255 int dist_scale_factor_field[2][32];
256 int map_col_to_list0[2][16 + 32];
257 int map_col_to_list0_field[2][2][16 + 32];
258
259 /**
260 * num_ref_idx_l0/1_active_minus1 + 1
261 */
262 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
263 unsigned int list_count;
264 H264Ref ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
265 * Reordered version of default_ref_list
266 * according to picture reordering in slice header */
267 struct {
268 uint8_t op;
269 uint32_t val;
270 } ref_modifications[2][32];
271 int nb_ref_modifications[2];
272
273 unsigned int pps_id;
274
275 const uint8_t *intra_pcm_ptr;
276
277 uint8_t *bipred_scratchpad;
278 uint8_t *edge_emu_buffer;
279 uint8_t (*top_borders[2])[(16 * 3) * 2];
280 int bipred_scratchpad_allocated;
281 int edge_emu_buffer_allocated;
282 int top_borders_allocated[2];
283
284 /**
285 * non zero coeff count cache.
286 * is 64 if not available.
287 */
288 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
289
290 /**
291 * Motion vector cache.
292 */
293 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
294 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
295 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
296 uint8_t direct_cache[5 * 8];
297
298 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
299
300 ///< as a DCT coefficient is int32_t in high depth, we need to reserve twice the space.
301 DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
302 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
303 ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either
304 ///< check that i is not too large or ensure that there is some unused stuff after mb
305 int16_t mb_padding[256 * 2];
306
307 uint8_t (*mvd_table[2])[2];
308
309 /**
310 * Cabac
311 */
312 CABACContext cabac;
313 uint8_t cabac_state[1024];
314 int cabac_init_idc;
315
316 MMCO mmco[H264_MAX_MMCO_COUNT];
317 int nb_mmco;
318 int explicit_ref_marking;
319
320 int frame_num;
321 int idr_pic_id;
322 int poc_lsb;
323 int delta_poc_bottom;
324 int delta_poc[2];
325 int curr_pic_num;
326 int max_pic_num;
327 } H264SliceContext;
328
329 /**
330 * H264Context
331 */
332 typedef struct H264Context {
333 const AVClass *class;
334 AVCodecContext *avctx;
335 VideoDSPContext vdsp;
336 H264DSPContext h264dsp;
337 H264ChromaContext h264chroma;
338 H264QpelContext h264qpel;
339 H274FilmGrainDatabase h274db;
340
341 H264Picture DPB[H264_MAX_PICTURE_COUNT];
342 H264Picture *cur_pic_ptr;
343 H264Picture cur_pic;
344 H264Picture last_pic_for_ec;
345
346 H264SliceContext *slice_ctx;
347 int nb_slice_ctx;
348 int nb_slice_ctx_queued;
349
350 H2645Packet pkt;
351
352 int pixel_shift; ///< 0 for 8-bit H.264, 1 for high-bit-depth H.264
353
354 /* coded dimensions -- 16 * mb w/h */
355 int width, height;
356 int chroma_x_shift, chroma_y_shift;
357
358 int droppable;
359 int coded_picture_number;
360
361 int context_initialized;
362 int flags;
363 int workaround_bugs;
364 int x264_build;
365 /* Set when slice threading is used and at least one slice uses deblocking
366 * mode 1 (i.e. across slice boundaries). Then we disable the loop filter
367 * during normal MB decoding and execute it serially at the end.
368 */
369 int postpone_filter;
370
371 /*
372 * Set to 1 when the current picture is IDR, 0 otherwise.
373 */
374 int picture_idr;
375
376 /*
377 * Set to 1 when the current picture contains only I slices, 0 otherwise.
378 */
379 int picture_intra_only;
380
381 int crop_left;
382 int crop_right;
383 int crop_top;
384 int crop_bottom;
385
386 int8_t(*intra4x4_pred_mode);
387 H264PredContext hpc;
388
389 uint8_t (*non_zero_count)[48];
390
391 #define LIST_NOT_USED -1 // FIXME rename?
392
393 /**
394 * block_offset[ 0..23] for frame macroblocks
395 * block_offset[24..47] for field macroblocks
396 */
397 int block_offset[2 * (16 * 3)];
398
399 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
400 uint32_t *mb2br_xy;
401 int b_stride; // FIXME use s->b4_stride
402
403 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
404
405 // interlacing specific flags
406 int mb_aff_frame;
407 int picture_structure;
408 int first_field;
409
410 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
411
412 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
413 uint16_t *cbp_table;
414
415 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
416 uint8_t *chroma_pred_mode_table;
417 uint8_t (*mvd_table[2])[2];
418 uint8_t *direct_table;
419
420 uint8_t scan_padding[16];
421 uint8_t zigzag_scan[16];
422 uint8_t zigzag_scan8x8[64];
423 uint8_t zigzag_scan8x8_cavlc[64];
424 uint8_t field_scan[16];
425 uint8_t field_scan8x8[64];
426 uint8_t field_scan8x8_cavlc[64];
427 uint8_t zigzag_scan_q0[16];
428 uint8_t zigzag_scan8x8_q0[64];
429 uint8_t zigzag_scan8x8_cavlc_q0[64];
430 uint8_t field_scan_q0[16];
431 uint8_t field_scan8x8_q0[64];
432 uint8_t field_scan8x8_cavlc_q0[64];
433
434 int mb_y;
435 int mb_height, mb_width;
436 int mb_stride;
437 int mb_num;
438
439 // =============================================================
440 // Things below are not used in the MB or more inner code
441
442 int nal_ref_idc;
443 int nal_unit_type;
444
445 int has_slice; ///< slice NAL is found in the packet, set by decode_nal_units, its state does not need to be preserved outside h264_decode_frame()
446
447 /**
448 * Used to parse AVC variant of H.264
449 */
450 int is_avc; ///< this flag is != 0 if codec is avc1
451 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
452
453 int bit_depth_luma; ///< luma bit depth from sps to detect changes
454 int chroma_format_idc; ///< chroma format from sps to detect changes
455
456 H264ParamSets ps;
457
458 uint16_t *slice_table_base;
459
460 H264POCContext poc;
461
462 H264Ref default_ref[2];
463 H264Picture *short_ref[32];
464 H264Picture *long_ref[32];
465 H264Picture *delayed_pic[H264_MAX_DPB_FRAMES + 2]; // FIXME size?
466 int last_pocs[H264_MAX_DPB_FRAMES];
467 H264Picture *next_output_pic;
468 int next_outputed_poc;
469 int poc_offset; ///< PicOrderCnt_offset from SMPTE RDD-2006
470
471 /**
472 * memory management control operations buffer.
473 */
474 MMCO mmco[H264_MAX_MMCO_COUNT];
475 int nb_mmco;
476 int mmco_reset;
477 int explicit_ref_marking;
478
479 int long_ref_count; ///< number of actual long term references
480 int short_ref_count; ///< number of actual short term references
481
482 /**
483 * @name Members for slice based multithreading
484 * @{
485 */
486 /**
487 * current slice number, used to initialize slice_num of each thread/context
488 */
489 int current_slice;
490
491 /** @} */
492
493 /**
494 * Complement sei_pic_struct
495 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
496 * However, soft telecined frames may have these values.
497 * This is used in an attempt to flag soft telecine progressive.
498 */
499 int prev_interlaced_frame;
500
501 /**
502 * Are the SEI recovery points looking valid.
503 */
504 int valid_recovery_point;
505
506 /**
507 * recovery_frame is the frame_num at which the next frame should
508 * be fully constructed.
509 *
510 * Set to -1 when not expecting a recovery point.
511 */
512 int recovery_frame;
513
514 /**
515 * We have seen an IDR, so all the following frames in coded order are correctly
516 * decodable.
517 */
518 #define FRAME_RECOVERED_IDR (1 << 0)
519 /**
520 * Sufficient number of frames have been decoded since a SEI recovery point,
521 * so all the following frames in presentation order are correct.
522 */
523 #define FRAME_RECOVERED_SEI (1 << 1)
524 /**
525 * Recovery point detected by heuristic
526 */
527 #define FRAME_RECOVERED_HEURISTIC (1 << 2)
528
529 /**
530 * Initial frame has been completely recovered.
531 *
532 * Once this is set, all following decoded as well as displayed frames will be marked as recovered
533 * If a frame is marked as recovered frame_recovered will be set once this frame is output and thus
534 * all subsequently output fraames are also marked as recovered
535 *
536 * In effect, if you want all subsequent DECODED frames marked as recovered, set frame_recovered
537 * If you want all subsequent DISPAYED frames marked as recovered, set the frame->recovered
538 */
539 int frame_recovered;
540
541 int has_recovery_point;
542
543 int missing_fields;
544
545 /* for frame threading, this is set to 1
546 * after finish_setup() has been called, so we cannot modify
547 * some context properties (which are supposed to stay constant between
548 * slices) anymore */
549 int setup_finished;
550
551 int cur_chroma_format_idc;
552 int cur_bit_depth_luma;
553 int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low
554
555 /* original AVCodecContext dimensions, used to handle container
556 * cropping */
557 int width_from_caller;
558 int height_from_caller;
559
560 int enable_er;
561 ERContext er;
562 int16_t *dc_val_base;
563
564 H264SEIContext sei;
565
566 struct FFRefStructPool *qscale_table_pool;
567 struct FFRefStructPool *mb_type_pool;
568 struct FFRefStructPool *motion_val_pool;
569 struct FFRefStructPool *ref_index_pool;
570 struct FFRefStructPool *decode_error_flags_pool;
571 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
572
573 int non_gray; ///< Did we encounter a intra frame after a gray gap frame
574 int noref_gray;
575 int skip_gray;
576 } H264Context;
577
578 extern const uint16_t ff_h264_mb_sizes[4];
579
580 /**
581 * Reconstruct bitstream slice_type.
582 */
583 int ff_h264_get_slice_type(const H264SliceContext *sl);
584
585 /**
586 * Allocate tables.
587 * needs width/height
588 */
589 int ff_h264_alloc_tables(H264Context *h);
590
591 int ff_h264_decode_ref_pic_list_reordering(H264SliceContext *sl, void *logctx);
592 int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl);
593 void ff_h264_remove_all_refs(H264Context *h);
594
595 /**
596 * Execute the reference picture marking (memory management control operations).
597 */
598 int ff_h264_execute_ref_pic_marking(H264Context *h);
599
600 int ff_h264_decode_ref_pic_marking(H264SliceContext *sl, GetBitContext *gb,
601 const H2645NAL *nal, void *logctx);
602
603 void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl);
604 void ff_h264_decode_init_vlc(void);
605
606 /**
607 * Decode a macroblock
608 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
609 */
610 int ff_h264_decode_mb_cavlc(const H264Context *h, H264SliceContext *sl);
611
612 /**
613 * Decode a CABAC coded macroblock
614 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
615 */
616 int ff_h264_decode_mb_cabac(const H264Context *h, H264SliceContext *sl);
617
618 void ff_h264_init_cabac_states(const H264Context *h, H264SliceContext *sl);
619
620 void ff_h264_direct_dist_scale_factor(const H264Context *const h, H264SliceContext *sl);
621 void ff_h264_direct_ref_list_init(const H264Context *const h, H264SliceContext *sl);
622 void ff_h264_pred_direct_motion(const H264Context *const h, H264SliceContext *sl,
623 int *mb_type);
624
625 void ff_h264_filter_mb_fast(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
626 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
627 unsigned int linesize, unsigned int uvlinesize);
628 void ff_h264_filter_mb(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
629 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
630 unsigned int linesize, unsigned int uvlinesize);
631
632 /*
633 * o-o o-o
634 * / / /
635 * o-o o-o
636 * ,---'
637 * o-o o-o
638 * / / /
639 * o-o o-o
640 */
641
642 /* Scan8 organization:
643 * 0 1 2 3 4 5 6 7
644 * 0 DY y y y y y
645 * 1 y Y Y Y Y
646 * 2 y Y Y Y Y
647 * 3 y Y Y Y Y
648 * 4 y Y Y Y Y
649 * 5 DU u u u u u
650 * 6 u U U U U
651 * 7 u U U U U
652 * 8 u U U U U
653 * 9 u U U U U
654 * 10 DV v v v v v
655 * 11 v V V V V
656 * 12 v V V V V
657 * 13 v V V V V
658 * 14 v V V V V
659 * DY/DU/DV are for luma/chroma DC.
660 */
661
662 #define LUMA_DC_BLOCK_INDEX 48
663 #define CHROMA_DC_BLOCK_INDEX 49
664
665 /**
666 * Get the chroma qp.
667 */
668 63938432 static av_always_inline int get_chroma_qp(const PPS *pps, int t, int qscale)
669 {
670 63938432 return pps->chroma_qp_table[t][qscale];
671 }
672
673 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup);
674
675 int ff_h264_ref_picture(H264Picture *dst, const H264Picture *src);
676 int ff_h264_replace_picture(H264Picture *dst, const H264Picture *src);
677 void ff_h264_unref_picture(H264Picture *pic);
678
679 void ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl);
680
681 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height);
682
683 /**
684 * Submit a slice for decoding.
685 *
686 * Parse the slice header, starting a new field/frame if necessary. If any
687 * slices are queued for the previous field, they are decoded.
688 */
689 int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal);
690 int ff_h264_execute_decode_slices(H264Context *h);
691 int ff_h264_update_thread_context(AVCodecContext *dst,
692 const AVCodecContext *src);
693 int ff_h264_update_thread_context_for_user(AVCodecContext *dst,
694 const AVCodecContext *src);
695
696 void ff_h264_flush_change(H264Context *h);
697
698 void ff_h264_free_tables(H264Context *h);
699
700 void ff_h264_set_erpic(ERPicture *dst, const H264Picture *src);
701
702 #endif /* AVCODEC_H264DEC_H */
703