FFmpeg
h264dec.h
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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/intreadwrite.h"
33 #include "libavutil/thread.h"
34 
35 #include "cabac.h"
36 #include "error_resilience.h"
37 #include "h264_parse.h"
38 #include "h264_ps.h"
39 #include "h264_sei.h"
40 #include "h2645_parse.h"
41 #include "h264chroma.h"
42 #include "h264dsp.h"
43 #include "h264pred.h"
44 #include "h264qpel.h"
45 #include "internal.h"
46 #include "mpegutils.h"
47 #include "parser.h"
48 #include "qpeldsp.h"
49 #include "rectangle.h"
50 #include "videodsp.h"
51 
52 #define H264_MAX_PICTURE_COUNT 36
53 
54 #define MAX_MMCO_COUNT 66
55 
56 #define MAX_DELAYED_PIC_COUNT 16
57 
58 /* Compiling in interlaced support reduces the speed
59  * of progressive decoding by about 2%. */
60 #define ALLOW_INTERLACE
61 
62 #define FMO 0
63 
64 /**
65  * The maximum number of slices supported by the decoder.
66  * must be a power of 2
67  */
68 #define MAX_SLICES 32
69 
70 #ifdef ALLOW_INTERLACE
71 #define MB_MBAFF(h) (h)->mb_mbaff
72 #define MB_FIELD(sl) (sl)->mb_field_decoding_flag
73 #define FRAME_MBAFF(h) (h)->mb_aff_frame
74 #define FIELD_PICTURE(h) ((h)->picture_structure != PICT_FRAME)
75 #define LEFT_MBS 2
76 #define LTOP 0
77 #define LBOT 1
78 #define LEFT(i) (i)
79 #else
80 #define MB_MBAFF(h) 0
81 #define MB_FIELD(sl) 0
82 #define FRAME_MBAFF(h) 0
83 #define FIELD_PICTURE(h) 0
84 #undef IS_INTERLACED
85 #define IS_INTERLACED(mb_type) 0
86 #define LEFT_MBS 1
87 #define LTOP 0
88 #define LBOT 0
89 #define LEFT(i) 0
90 #endif
91 #define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h))
92 
93 #ifndef CABAC
94 #define CABAC(h) (h)->ps.pps->cabac
95 #endif
96 
97 #define CHROMA(h) ((h)->ps.sps->chroma_format_idc)
98 #define CHROMA422(h) ((h)->ps.sps->chroma_format_idc == 2)
99 #define CHROMA444(h) ((h)->ps.sps->chroma_format_idc == 3)
100 
101 #define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
102 #define MB_TYPE_8x8DCT 0x01000000
103 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
104 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
105 
106 /**
107  * Memory management control operation opcode.
108  */
109 typedef enum MMCOOpcode {
110  MMCO_END = 0,
117 } MMCOOpcode;
118 
119 /**
120  * Memory management control operation.
121  */
122 typedef struct MMCO {
124  int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
125  int long_arg; ///< index, pic_num, or num long refs depending on opcode
126 } MMCO;
127 
128 typedef struct H264Picture {
131 
133  int8_t *qscale_table;
134 
135  AVBufferRef *motion_val_buf[2];
136  int16_t (*motion_val[2])[2];
137 
139  uint32_t *mb_type;
140 
142  void *hwaccel_picture_private; ///< hardware accelerator private data
143 
144  AVBufferRef *ref_index_buf[2];
145  int8_t *ref_index[2];
146 
147  int field_poc[2]; ///< top/bottom POC
148  int poc; ///< frame POC
149  int frame_num; ///< frame_num (raw frame_num from slice header)
150  int mmco_reset; /**< MMCO_RESET set this 1. Reordering code must
151  not mix pictures before and after MMCO_RESET. */
152  int pic_id; /**< pic_num (short -> no wrap version of pic_num,
153  pic_num & max_pic_num; long -> long_pic_num) */
154  int long_ref; ///< 1->long term reference 0->short term reference
155  int ref_poc[2][2][32]; ///< POCs of the frames/fields used as reference (FIXME need per slice)
156  int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
157  int mbaff; ///< 1 -> MBAFF frame 0-> not MBAFF
158  int field_picture; ///< whether or not picture was encoded in separate fields
159 
161  int recovered; ///< picture at IDR or recovery point + recovery count
164 
166  const PPS *pps;
167 
168  int mb_width, mb_height;
170 } H264Picture;
171 
172 typedef struct H264Ref {
174  int linesize[3];
175 
177  int poc;
178  int pic_id;
179 
181 } H264Ref;
182 
183 typedef struct H264SliceContext {
184  struct H264Context *h264;
187 
190  int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
192 
193  int qscale;
194  int chroma_qp[2]; // QPc
195  int qp_thresh; ///< QP threshold to skip loopfilter
197 
198  // deblock
199  int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
202 
204 
207 
210 
211  int8_t intra4x4_pred_mode_cache[5 * 8];
213 
217  int left_mb_xy[LEFT_MBS];
218 
220  int top_type;
222  int left_type[LEFT_MBS];
223 
226 
228  unsigned int top_samples_available;
231 
232  ptrdiff_t linesize, uvlinesize;
233  ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
234  ptrdiff_t mb_uvlinesize;
235 
236  int mb_x, mb_y;
237  int mb_xy;
240  unsigned int first_mb_addr;
241  // index of the first MB of the next slice
245 
248  int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
249 
251 
252  /**
253  * number of neighbors (top and/or left) that used 8x8 dct
254  */
256 
260 
261  int cbp;
262  int top_cbp;
263  int left_cbp;
264 
265  int dist_scale_factor[32];
266  int dist_scale_factor_field[2][32];
267  int map_col_to_list0[2][16 + 32];
268  int map_col_to_list0_field[2][2][16 + 32];
269 
270  /**
271  * num_ref_idx_l0/1_active_minus1 + 1
272  */
273  unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
274  unsigned int list_count;
275  H264Ref ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
276  * Reordered version of default_ref_list
277  * according to picture reordering in slice header */
278  struct {
280  uint32_t val;
281  } ref_modifications[2][32];
282  int nb_ref_modifications[2];
283 
284  unsigned int pps_id;
285 
287  int16_t *dc_val_base;
288 
291  uint8_t (*top_borders[2])[(16 * 3) * 2];
294  int top_borders_allocated[2];
295 
296  /**
297  * non zero coeff count cache.
298  * is 64 if not available.
299  */
300  DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
301 
302  /**
303  * Motion vector cache.
304  */
305  DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
306  DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
307  DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
308  uint8_t direct_cache[5 * 8];
309 
310  DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
311 
312  ///< as a DCT coefficient is int32_t in high depth, we need to reserve twice the space.
313  DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
314  DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
315  ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either
316  ///< check that i is not too large or ensure that there is some unused stuff after mb
317  int16_t mb_padding[256 * 2];
318 
319  uint8_t (*mvd_table[2])[2];
320 
321  /**
322  * Cabac
323  */
325  uint8_t cabac_state[1024];
327 
329  int nb_mmco;
331 
333  int poc_lsb;
335  int delta_poc[2];
339 
340 /**
341  * H264Context
342  */
343 typedef struct H264Context {
344  const AVClass *class;
350 
355 
359 
361 
362  int pixel_shift; ///< 0 for 8-bit H.264, 1 for high-bit-depth H.264
363 
364  /* coded dimensions -- 16 * mb w/h */
365  int width, height;
366  int chroma_x_shift, chroma_y_shift;
367 
370 
372  int flags;
375  /* Set when slice threading is used and at least one slice uses deblocking
376  * mode 1 (i.e. across slice boundaries). Then we disable the loop filter
377  * during normal MB decoding and execute it serially at the end.
378  */
380 
381  /*
382  * Set to 1 when the current picture is IDR, 0 otherwise.
383  */
385 
388  int crop_top;
390 
391  int8_t(*intra4x4_pred_mode);
393 
394  uint8_t (*non_zero_count)[48];
395 
396 #define LIST_NOT_USED -1 // FIXME rename?
397 #define PART_NOT_AVAILABLE -2
398 
399  /**
400  * block_offset[ 0..23] for frame macroblocks
401  * block_offset[24..47] for field macroblocks
402  */
403  int block_offset[2 * (16 * 3)];
404 
405  uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
406  uint32_t *mb2br_xy;
407  int b_stride; // FIXME use s->b4_stride
408 
409  uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
410 
411  // interlacing specific flags
415 
416  uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
417 
418  /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
419  uint16_t *cbp_table;
420 
421  /* chroma_pred_mode for i4x4 or i16x16, else 0 */
423  uint8_t (*mvd_table[2])[2];
425 
426  uint8_t scan_padding[16];
427  uint8_t zigzag_scan[16];
428  uint8_t zigzag_scan8x8[64];
433  uint8_t zigzag_scan_q0[16];
434  uint8_t zigzag_scan8x8_q0[64];
435  uint8_t zigzag_scan8x8_cavlc_q0[64];
436  uint8_t field_scan_q0[16];
437  uint8_t field_scan8x8_q0[64];
438  uint8_t field_scan8x8_cavlc_q0[64];
439 
440  int mb_y;
441  int mb_height, mb_width;
443  int mb_num;
444 
445  // =============================================================
446  // Things below are not used in the MB or more inner code
447 
450 
451  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()
452 
453  /**
454  * Used to parse AVC variant of H.264
455  */
456  int is_avc; ///< this flag is != 0 if codec is avc1
457  int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
458 
459  int bit_depth_luma; ///< luma bit depth from sps to detect changes
460  int chroma_format_idc; ///< chroma format from sps to detect changes
461 
463 
464  uint16_t *slice_table_base;
465 
467 
468  H264Ref default_ref[2];
469  H264Picture *short_ref[32];
470  H264Picture *long_ref[32];
471  H264Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
472  int last_pocs[MAX_DELAYED_PIC_COUNT];
475 
476  /**
477  * memory management control operations buffer.
478  */
480  int nb_mmco;
483 
484  int long_ref_count; ///< number of actual long term references
485  int short_ref_count; ///< number of actual short term references
486 
487  /**
488  * @name Members for slice based multithreading
489  * @{
490  */
491  /**
492  * current slice number, used to initialize slice_num of each thread/context
493  */
495 
496  /** @} */
497 
498  /**
499  * Complement sei_pic_struct
500  * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
501  * However, soft telecined frames may have these values.
502  * This is used in an attempt to flag soft telecine progressive.
503  */
505 
506  /**
507  * Are the SEI recovery points looking valid.
508  */
510 
511  /**
512  * recovery_frame is the frame_num at which the next frame should
513  * be fully constructed.
514  *
515  * Set to -1 when not expecting a recovery point.
516  */
518 
519 /**
520  * We have seen an IDR, so all the following frames in coded order are correctly
521  * decodable.
522  */
523 #define FRAME_RECOVERED_IDR (1 << 0)
524 /**
525  * Sufficient number of frames have been decoded since a SEI recovery point,
526  * so all the following frames in presentation order are correct.
527  */
528 #define FRAME_RECOVERED_SEI (1 << 1)
529 
530  int frame_recovered; ///< Initial frame has been completely recovered
531 
533 
535 
536  /* for frame threading, this is set to 1
537  * after finish_setup() has been called, so we cannot modify
538  * some context properties (which are supposed to stay constant between
539  * slices) anymore */
541 
544  int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low
545 
546  /* original AVCodecContext dimensions, used to handle container
547  * cropping */
550 
552 
554 
559  int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
560 } H264Context;
561 
562 extern const uint16_t ff_h264_mb_sizes[4];
563 
564 /**
565  * Reconstruct bitstream slice_type.
566  */
568 
569 /**
570  * Allocate tables.
571  * needs width/height
572  */
574 
578 
579 /**
580  * Execute the reference picture marking (memory management control operations).
581  */
583 
585  const H2645NAL *nal, void *logctx);
586 
588 void ff_h264_decode_init_vlc(void);
589 
590 /**
591  * Decode a macroblock
592  * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
593  */
595 
596 /**
597  * Decode a CABAC coded macroblock
598  * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
599  */
601 
603 
607  int *mb_type);
608 
609 void ff_h264_filter_mb_fast(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
610  uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
611  unsigned int linesize, unsigned int uvlinesize);
612 void ff_h264_filter_mb(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
613  uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
614  unsigned int linesize, unsigned int uvlinesize);
615 
616 /*
617  * o-o o-o
618  * / / /
619  * o-o o-o
620  * ,---'
621  * o-o o-o
622  * / / /
623  * o-o o-o
624  */
625 
626 /* Scan8 organization:
627  * 0 1 2 3 4 5 6 7
628  * 0 DY y y y y y
629  * 1 y Y Y Y Y
630  * 2 y Y Y Y Y
631  * 3 y Y Y Y Y
632  * 4 y Y Y Y Y
633  * 5 DU u u u u u
634  * 6 u U U U U
635  * 7 u U U U U
636  * 8 u U U U U
637  * 9 u U U U U
638  * 10 DV v v v v v
639  * 11 v V V V V
640  * 12 v V V V V
641  * 13 v V V V V
642  * 14 v V V V V
643  * DY/DU/DV are for luma/chroma DC.
644  */
645 
646 #define LUMA_DC_BLOCK_INDEX 48
647 #define CHROMA_DC_BLOCK_INDEX 49
648 
649 // This table must be here because scan8[constant] must be known at compiletime
650 static const uint8_t scan8[16 * 3 + 3] = {
651  4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
652  6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
653  4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
654  6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
655  4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
656  6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
657  4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
658  6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
659  4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
660  6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
661  4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
662  6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
663  0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
664 };
665 
666 static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
667 {
668 #if HAVE_BIGENDIAN
669  return (b & 0xFFFF) + (a << 16);
670 #else
671  return (a & 0xFFFF) + (b << 16);
672 #endif
673 }
674 
675 static av_always_inline uint16_t pack8to16(unsigned a, unsigned b)
676 {
677 #if HAVE_BIGENDIAN
678  return (b & 0xFF) + (a << 8);
679 #else
680  return (a & 0xFF) + (b << 8);
681 #endif
682 }
683 
684 /**
685  * Get the chroma qp.
686  */
687 static av_always_inline int get_chroma_qp(const PPS *pps, int t, int qscale)
688 {
689  return pps->chroma_qp_table[t][qscale];
690 }
691 
692 /**
693  * Get the predicted intra4x4 prediction mode.
694  */
696  H264SliceContext *sl, int n)
697 {
698  const int index8 = scan8[n];
699  const int left = sl->intra4x4_pred_mode_cache[index8 - 1];
700  const int top = sl->intra4x4_pred_mode_cache[index8 - 8];
701  const int min = FFMIN(left, top);
702 
703  ff_tlog(h->avctx, "mode:%d %d min:%d\n", left, top, min);
704 
705  if (min < 0)
706  return DC_PRED;
707  else
708  return min;
709 }
710 
712  H264SliceContext *sl)
713 {
714  int8_t *i4x4 = sl->intra4x4_pred_mode + h->mb2br_xy[sl->mb_xy];
715  int8_t *i4x4_cache = sl->intra4x4_pred_mode_cache;
716 
717  AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
718  i4x4[4] = i4x4_cache[7 + 8 * 3];
719  i4x4[5] = i4x4_cache[7 + 8 * 2];
720  i4x4[6] = i4x4_cache[7 + 8 * 1];
721 }
722 
724  H264SliceContext *sl)
725 {
726  const int mb_xy = sl->mb_xy;
727  uint8_t *nnz = h->non_zero_count[mb_xy];
728  uint8_t *nnz_cache = sl->non_zero_count_cache;
729 
730  AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
731  AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
732  AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
733  AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
734  AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
735  AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
736  AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
737  AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
738 
739  if (!h->chroma_y_shift) {
740  AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
741  AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
742  AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
743  AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
744  }
745 }
746 
748  H264SliceContext *sl,
749  int b_stride,
750  int b_xy, int b8_xy,
751  int mb_type, int list)
752 {
753  int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy];
754  int16_t(*mv_src)[2] = &sl->mv_cache[list][scan8[0]];
755  AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
756  AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
757  AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
758  AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
759  if (CABAC(h)) {
760  uint8_t (*mvd_dst)[2] = &sl->mvd_table[list][FMO ? 8 * sl->mb_xy
761  : h->mb2br_xy[sl->mb_xy]];
762  uint8_t(*mvd_src)[2] = &sl->mvd_cache[list][scan8[0]];
763  if (IS_SKIP(mb_type)) {
764  AV_ZERO128(mvd_dst);
765  } else {
766  AV_COPY64(mvd_dst, mvd_src + 8 * 3);
767  AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
768  AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
769  AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
770  }
771  }
772 
773  {
774  int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy];
775  int8_t *ref_cache = sl->ref_cache[list];
776  ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
777  ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
778  ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
779  ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
780  }
781 }
782 
784  H264SliceContext *sl,
785  int mb_type)
786 {
787  const int b_stride = h->b_stride;
788  const int b_xy = 4 * sl->mb_x + 4 * sl->mb_y * h->b_stride; // try mb2b(8)_xy
789  const int b8_xy = 4 * sl->mb_xy;
790 
791  if (USES_LIST(mb_type, 0)) {
792  write_back_motion_list(h, sl, b_stride, b_xy, b8_xy, mb_type, 0);
793  } else {
794  fill_rectangle(&h->cur_pic.ref_index[0][b8_xy],
795  2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
796  }
797  if (USES_LIST(mb_type, 1))
798  write_back_motion_list(h, sl, b_stride, b_xy, b8_xy, mb_type, 1);
799 
800  if (sl->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) {
801  if (IS_8X8(mb_type)) {
802  uint8_t *direct_table = &h->direct_table[4 * sl->mb_xy];
803  direct_table[1] = sl->sub_mb_type[1] >> 1;
804  direct_table[2] = sl->sub_mb_type[2] >> 1;
805  direct_table[3] = sl->sub_mb_type[3] >> 1;
806  }
807  }
808 }
809 
811 {
813  return !(AV_RN64A(sl->sub_mb_type) &
815  0x0001000100010001ULL));
816  else
817  return !(AV_RN64A(sl->sub_mb_type) &
819  0x0001000100010001ULL));
820 }
821 
822 static inline int find_start_code(const uint8_t *buf, int buf_size,
823  int buf_index, int next_avc)
824 {
825  uint32_t state = -1;
826 
827  buf_index = avpriv_find_start_code(buf + buf_index, buf + next_avc + 1, &state) - buf - 1;
828 
829  return FFMIN(buf_index, buf_size);
830 }
831 
832 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup);
833 
836 
838 
839 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height);
840 
841 /**
842  * Submit a slice for decoding.
843  *
844  * Parse the slice header, starting a new field/frame if necessary. If any
845  * slices are queued for the previous field, they are decoded.
846  */
850  const AVCodecContext *src);
851 
853 
855 
856 void ff_h264_set_erpic(ERPicture *dst, H264Picture *src);
857 
858 #endif /* AVCODEC_H264DEC_H */
void ff_h264_decode_init_vlc(void)
Definition: h264_cavlc.c:327
struct H264Context * h264
Definition: h264dec.h:184
const uint8_t * left_block
Definition: h264dec.h:224
#define ff_tlog(ctx,...)
Definition: internal.h:86
Memory management control operation.
Definition: h264dec.h:122
int nb_mmco
Definition: h264dec.h:480
int workaround_bugs
Definition: h264dec.h:373
int long_ref
1->long term reference 0->short term reference
Definition: h264dec.h:154
int sei_recovery_frame_cnt
Definition: h264dec.h:163
int ff_h264_decode_ref_pic_marking(H264SliceContext *sl, GetBitContext *gb, const H2645NAL *nal, void *logctx)
Definition: h264_refs.c:834
int topright_mb_xy
Definition: h264dec.h:216
H264POCContext poc
Definition: h264dec.h:466
void ff_h264_filter_mb_fast(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize)
int mb_num
Definition: h264dec.h:443
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
int mb_aff_frame
Definition: h264dec.h:412
int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
Definition: h264_picture.c:66
int topleft_partition
Definition: h264dec.h:225
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
Definition: h264dec.h:305
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
int neighbor_transform_size
number of neighbors (top and/or left) that used 8x8 dct
Definition: h264dec.h:255
#define MB_TYPE_DIRECT2
Definition: mpegutils.h:59
int edge_emu_buffer_allocated
Definition: h264dec.h:293
int first_field
Definition: h264dec.h:414
int ff_h264_execute_ref_pic_marking(H264Context *h)
Execute the reference picture marking (memory management control operations).
Definition: h264_refs.c:610
int ff_h264_decode_mb_cabac(const H264Context *h, H264SliceContext *sl)
Decode a CABAC coded macroblock.
Definition: h264_cabac.c:1911
static av_always_inline int get_chroma_qp(const PPS *pps, int t, int qscale)
Get the chroma qp.
Definition: h264dec.h:687
unsigned int topleft_samples_available
Definition: h264dec.h:227
H264ChromaContext h264chroma
Definition: h264dec.h:348
uint16_t * cbp_table
Definition: h264dec.h:419
uint8_t mvd_cache[2][5 *8][2]
Definition: h264dec.h:307
int mb_y
Definition: h264dec.h:440
int coded_picture_number
Definition: h264dec.h:369
AVBufferRef * mb_type_buf
Definition: h264dec.h:138
int bipred_scratchpad_allocated
Definition: h264dec.h:292
AVBufferPool * mb_type_pool
Definition: h264dec.h:556
Picture parameter set.
Definition: h264_ps.h:111
int ff_h264_alloc_tables(H264Context *h)
Allocate tables.
Definition: h264dec.c:181
int prev_mb_skipped
Definition: h264dec.h:205
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:136
int flags
Definition: h264dec.h:372
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
static int find_start_code(const uint8_t *buf, int buf_size, int buf_index, int next_avc)
Definition: h264dec.h:822
#define MB_TYPE_16x8
Definition: mpegutils.h:55
int is_avc
Used to parse AVC variant of H.264.
Definition: h264dec.h:456
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:44
AVBufferPool * ref_index_pool
Definition: h264dec.h:558
int height_from_caller
Definition: h264dec.h:549
int next_slice_idx
Definition: h264dec.h:242
static const uint8_t zigzag_scan8x8_cavlc[64+1]
Definition: h264_slice.c:96
H264Context.
Definition: h264dec.h:343
AVFrame * f
Definition: h264dec.h:129
const PPS * pps
Definition: h264dec.h:166
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:136
static const uint8_t field_scan[16+1]
Definition: h264_slice.c:50
#define CABAC(h)
Definition: h264dec.h:94
int picture_structure
Definition: h264dec.h:413
#define AV_COPY32(d, s)
Definition: intreadwrite.h:601
MMCOOpcode opcode
Definition: h264dec.h:123
H.264 DSP functions.
uint8_t * chroma_pred_mode_table
Definition: h264dec.h:422
int setup_finished
Definition: h264dec.h:540
int ff_h264_execute_decode_slices(H264Context *h)
Call decode_slice() for each context.
Definition: h264_slice.c:2792
H264SEIContext sei
Definition: h264dec.h:553
#define USES_LIST(a, list)
Definition: mpegutils.h:99
uint16_t sub_mb_type[4]
as a DCT coefficient is int32_t in high depth, we need to reserve twice the space.
Definition: h264dec.h:310
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:103
int short_pic_num
pic_num without wrapping (pic_num & max_pic_num)
Definition: h264dec.h:124
uint8_t
#define mb
void ff_h264_direct_dist_scale_factor(const H264Context *const h, H264SliceContext *sl)
Definition: h264_direct.c:62
int slice_alpha_c0_offset
Definition: h264dec.h:200
int poc
Definition: h264dec.h:177
int field_picture
whether or not picture was encoded in separate fields
Definition: h264dec.h:158
int poc
frame POC
Definition: h264dec.h:148
void ff_h264_flush_change(H264Context *h)
Definition: h264dec.c:439
int invalid_gap
Definition: h264dec.h:162
Context for storing H.264 prediction functions.
Definition: h264pred.h:92
void ff_h264_remove_all_refs(H264Context *h)
Definition: h264_refs.c:565
quarterpel DSP functions
int frame_recovered
Initial frame has been completely recovered.
Definition: h264dec.h:530
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
#define height
int picture_structure
Definition: h264dec.h:246
static av_always_inline int pred_intra_mode(const H264Context *h, H264SliceContext *sl, int n)
Get the predicted intra4x4 prediction mode.
Definition: h264dec.h:695
int chroma_y_shift
Definition: h264dec.h:366
AVBufferRef * qscale_table_buf
Definition: h264dec.h:132
int has_slice
slice NAL is found in the packet, set by decode_nal_units, its state does not need to be preserved ou...
Definition: h264dec.h:451
H264Picture * parent
Definition: h264dec.h:180
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:161
#define AV_COPY64(d, s)
Definition: intreadwrite.h:605
The buffer pool.
const uint8_t * avpriv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state)
int width
Definition: h264dec.h:365
static av_always_inline void write_back_motion(const H264Context *h, H264SliceContext *sl, int mb_type)
Definition: h264dec.h:783
#define src
Definition: vp8dsp.c:254
unsigned int topright_samples_available
Definition: h264dec.h:229
H.264 parameter set handling.
H264PredContext hpc
Definition: h264dec.h:392
int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
Init context Allocate buffers which are not shared amongst multiple threads.
Definition: h264dec.c:222
#define MB_TYPE_8x16
Definition: mpegutils.h:56
void ff_h264_pred_direct_motion(const H264Context *const h, H264SliceContext *sl, int *mb_type)
Definition: h264_direct.c:721
int16_t * dc_val_base
Definition: h264dec.h:287
int context_initialized
Definition: h264dec.h:371
ERContext er
Definition: h264dec.h:186
int nal_unit_type
Definition: h264dec.h:449
void * hwaccel_picture_private
hardware accelerator private data
Definition: h264dec.h:142
int8_t intra4x4_pred_mode_cache[5 *8]
Definition: h264dec.h:211
static const uint8_t field_scan8x8[64+1]
Definition: h264_slice.c:57
H2645Packet pkt
Definition: h264dec.h:360
int picture_idr
Definition: h264dec.h:384
int deblocking_filter
disable_deblocking_filter_idc with 1 <-> 0
Definition: h264dec.h:199
int prev_interlaced_frame
Complement sei_pic_struct SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced...
Definition: h264dec.h:504
ThreadFrame tf
Definition: h264dec.h:130
#define IS_SKIP(a)
Definition: mpegutils.h:81
H264QpelContext h264qpel
Definition: h264dec.h:349
int direct_spatial_mv_pred
Definition: h264dec.h:257
unsigned int top_samples_available
Definition: h264dec.h:228
int frame_num
frame_num (raw frame_num from slice header)
Definition: h264dec.h:149
MMCOOpcode
Memory management control operation opcode.
Definition: h264dec.h:109
int ff_h264_decode_ref_pic_list_reordering(H264SliceContext *sl, void *logctx)
Definition: h264_refs.c:423
int valid_recovery_point
Are the SEI recovery points looking valid.
Definition: h264dec.h:509
uint8_t * list_counts
Array of list_count per MB specifying the slice type.
Definition: h264dec.h:416
int ff_h264_get_slice_type(const H264SliceContext *sl)
Reconstruct bitstream slice_type.
Definition: h264_slice.c:2208
static av_always_inline uint16_t pack8to16(unsigned a, unsigned b)
Definition: h264dec.h:675
int slice_type_nos
S free slice type (SI/SP are remapped to I/P)
Definition: h264dec.h:190
AVBufferRef * hwaccel_priv_buf
Definition: h264dec.h:141
int crop_bottom
Definition: h264dec.h:389
int pic_id
Definition: h264dec.h:178
void ff_h264_init_cabac_states(const H264Context *h, H264SliceContext *sl)
Definition: h264_cabac.c:1262
uint8_t * direct_table
Definition: h264dec.h:424
static av_always_inline int get_dct8x8_allowed(const H264Context *h, H264SliceContext *sl)
Definition: h264dec.h:810
int nal_length_size
Number of bytes used for nal length (1, 2 or 4)
Definition: h264dec.h:457
useful rectangle filling function
void ff_h264_direct_ref_list_init(const H264Context *const h, H264SliceContext *sl)
Definition: h264_direct.c:121
#define b
Definition: input.c:41
Context for storing H.264 DSP functions.
Definition: h264dsp.h:42
int chroma_pred_mode
Definition: h264dec.h:208
#define AV_COPY16(d, s)
Definition: intreadwrite.h:597
static struct @322 state
int x264_build
Definition: h264dec.h:374
uint32_t * mb2br_xy
Definition: h264dec.h:406
#define FFMIN(a, b)
Definition: common.h:96
uint16_t * slice_table
slice_table_base + 2*mb_stride + 1
Definition: h264dec.h:409
void ff_h264_filter_mb(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize)
CABACContext cabac
Cabac.
Definition: h264dec.h:324
unsigned int first_mb_addr
Definition: h264dec.h:240
int reference
Definition: h264dec.h:160
#define LEFT_MBS
Definition: h264dec.h:75
int redundant_pic_count
Definition: h264dec.h:250
int nb_slice_ctx
Definition: h264dec.h:357
H264PredWeightTable pwt
Definition: h264dec.h:203
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:159
int long_ref_count
number of actual long term references
Definition: h264dec.h:484
int ff_h264_decode_mb_cavlc(const H264Context *h, H264SliceContext *sl)
Decode a macroblock.
Definition: h264_cavlc.c:702
uint32_t * mb_type
Definition: h264dec.h:139
int next_mb_skipped
Definition: h264dec.h:206
uint8_t chroma_qp_table[2][QP_MAX_NUM+1]
pre-scaled (with chroma_qp_index_offset) version of qp_table
Definition: h264_ps.h:129
int mmco_reset
Definition: h264dec.h:481
int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
Submit a slice for decoding.
Definition: h264_slice.c:2083
H264SliceContext * slice_ctx
Definition: h264dec.h:356
int direct_8x8_inference_flag
Definition: h264_ps.h:64
int reference
Definition: h264dec.h:176
static void fill_rectangle(int x, int y, int w, int h)
Definition: ffplay.c:831
const uint16_t ff_h264_mb_sizes[4]
Definition: h264dec.c:59
uint8_t * edge_emu_buffer
Definition: h264dec.h:290
#define MB_TYPE_8x8
Definition: mpegutils.h:57
int bit_depth_luma
luma bit depth from sps to detect changes
Definition: h264dec.h:459
int chroma_format_idc
chroma format from sps to detect changes
Definition: h264dec.h:460
VideoDSPContext vdsp
Definition: h264dec.h:346
int intra16x16_pred_mode
Definition: h264dec.h:209
int mb_stride
Definition: h264dec.h:442
int postpone_filter
Definition: h264dec.h:379
AVCodecContext * avctx
Definition: h264dec.h:345
int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl)
Definition: h264_refs.c:299
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
int last_qscale_diff
Definition: h264dec.h:196
int crop_left
Definition: h264dec.h:386
int next_outputed_poc
Definition: h264dec.h:474
int explicit_ref_marking
Definition: h264dec.h:482
int recovery_frame
recovery_frame is the frame_num at which the next frame should be fully constructed.
Definition: h264dec.h:517
main external API structure.
Definition: avcodec.h:526
int qp_thresh
QP threshold to skip loopfilter.
Definition: h264dec.h:195
int explicit_ref_marking
Definition: h264dec.h:330
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining list
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2]...the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so...,+,-,+,-,+,+,-,+,-,+,...hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32-hcoeff[1]-hcoeff[2]-...a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2}an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||.........intra?||||:Block01:yes no||||:Block02:.................||||:Block03::y DC::ref index:||||:Block04::cb DC::motion x:||||.........:cr DC::motion y:||||.................|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------------------------------|||Y subbands||Cb subbands||Cr subbands||||------||------||------|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||------||------||------||||------||------||------|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||------||------||------||||------||------||------|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||------||------||------||||------||------||------|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------------------------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction------------|\Dequantization-------------------\||Reference frames|\IDWT|--------------|Motion\|||Frame 0||Frame 1||Compensation.OBMC v-------|--------------|--------------.\------> Frame n output Frame Frame<----------------------------------/|...|-------------------Range Coder:============Binary Range Coder:-------------------The implemented range coder is an adapted version based upon"Range encoding: an algorithm for removing redundancy from a digitised message."by G.N.N.Martin.The symbols encoded by the Snow range coder are bits(0|1).The associated probabilities are not fix but change depending on the symbol mix seen so far.bit seen|new state---------+-----------------------------------------------0|256-state_transition_table[256-old_state];1|state_transition_table[old_state];state_transition_table={0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:-------------------------FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1.the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:206
int8_t * qscale_table
Definition: h264dec.h:133
static const uint8_t scan8[16 *3+3]
Definition: h264dec.h:650
static const uint8_t field_scan8x8_cavlc[64+1]
Definition: h264_slice.c:76
Describe the class of an AVClass context structure.
Definition: log.h:67
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
uint8_t non_zero_count_cache[15 *8]
non zero coeff count cache.
Definition: h264dec.h:300
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
Definition: h264dec.h:666
int8_t * ref_index[2]
Definition: h264dec.h:145
int pixel_shift
0 for 8-bit H.264, 1 for high-bit-depth H.264
Definition: h264dec.h:362
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:150
H264Picture * cur_pic_ptr
Definition: h264dec.h:352
#define LIST_NOT_USED
Definition: h264dec.h:396
ptrdiff_t mb_uvlinesize
Definition: h264dec.h:234
refcounted data buffer API
#define FMO
Definition: h264dec.h:62
int mb_mbaff
mb_aff_frame && mb_field_decoding_flag
Definition: h264dec.h:248
int enable_er
Definition: h264dec.h:551
const SPS * sps
Definition: h264_ps.h:150
int width_from_caller
Definition: h264dec.h:548
ptrdiff_t mb_linesize
may be equal to s->linesize or s->linesize * 2, for mbaff
Definition: h264dec.h:233
ptrdiff_t uvlinesize
Definition: h264dec.h:232
H.264 / AVC / MPEG-4 prediction functions.
unsigned int list_count
Definition: h264dec.h:274
AVBufferRef * pps_buf
Definition: h264dec.h:165
Definition: vp9.h:48
#define AV_ZERO128(d)
Definition: intreadwrite.h:637
int has_recovery_point
Definition: h264dec.h:532
int ff_h264_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: h264_slice.c:296
void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
Definition: h264_mb.c:799
int mb_stride
Definition: h264dec.h:169
int mbaff
1 -> MBAFF frame 0-> not MBAFF
Definition: h264dec.h:157
A reference to a data buffer.
Definition: buffer.h:81
int nb_slice_ctx_queued
Definition: h264dec.h:358
AVBufferPool * qscale_table_pool
Definition: h264dec.h:555
H264Picture * next_output_pic
Definition: h264dec.h:473
AVBufferPool * motion_val_pool
Definition: h264dec.h:557
static av_always_inline void write_back_non_zero_count(const H264Context *h, H264SliceContext *sl)
Definition: h264dec.h:723
int pic_id
pic_num (short -> no wrap version of pic_num, pic_num & max_pic_num; long -> long_pic_num) ...
Definition: h264dec.h:152
int delta_poc_bottom
Definition: h264dec.h:334
#define MAX_SLICES
The maximum number of slices supported by the decoder.
Definition: h264dec.h:68
common internal api header.
static av_always_inline void write_back_motion_list(const H264Context *h, H264SliceContext *sl, int b_stride, int b_xy, int b8_xy, int mb_type, int list)
Definition: h264dec.h:747
#define AV_COPY128(d, s)
Definition: intreadwrite.h:609
uint16_t * slice_table_base
Definition: h264dec.h:464
int missing_fields
Definition: h264dec.h:534
H264ParamSets ps
Definition: h264dec.h:462
void ff_h264_free_tables(H264Context *h)
Definition: h264dec.c:138
Bi-dir predicted.
Definition: avutil.h:276
uint8_t op
Definition: h264dec.h:279
int cur_chroma_format_idc
Definition: h264dec.h:542
int8_t * intra4x4_pred_mode
Definition: h264dec.h:212
int long_arg
index, pic_num, or num long refs depending on opcode
Definition: h264dec.h:125
Core video DSP helper functions.
int8_t ref_cache[2][5 *8]
Definition: h264dec.h:306
Decoded Picture Buffer (DPB).
Definition: vaapi_h264.c:82
unsigned int pps_id
Definition: h264dec.h:284
#define IS_8X8(a)
Definition: mpegutils.h:89
H264Picture cur_pic
Definition: h264dec.h:353
int mb_width
Definition: h264dec.h:441
int current_slice
current slice number, used to initialize slice_num of each thread/context
Definition: h264dec.h:494
uint32_t * mb2b_xy
Definition: h264dec.h:405
int cur_bit_depth_luma
Definition: h264dec.h:543
int crop_top
Definition: h264dec.h:388
H264Picture last_pic_for_ec
Definition: h264dec.h:354
const uint8_t * intra_pcm_ptr
Definition: h264dec.h:286
H264DSPContext h264dsp
Definition: h264dec.h:347
unsigned int left_samples_available
Definition: h264dec.h:230
uint8_t(*[2] mvd_table)[2]
Definition: h264dec.h:319
int slice_type_fixed
Definition: h264dec.h:191
int mb_width
Definition: h264dec.h:168
#define av_always_inline
Definition: attributes.h:45
int slice_beta_offset
Definition: h264dec.h:201
int8_t * intra4x4_pred_mode
Definition: h264dec.h:391
#define AV_RN64A(p)
Definition: intreadwrite.h:530
int mb_field_decoding_flag
Definition: h264dec.h:247
uint8_t(* non_zero_count)[48]
Definition: h264dec.h:394
H.264 decoder/parser shared code.
uint8_t * bipred_scratchpad
Definition: h264dec.h:289
float min
int droppable
Definition: h264dec.h:368
int crop_right
Definition: h264dec.h:387
int nal_ref_idc
Definition: h264dec.h:448
GetBitContext gb
Definition: h264dec.h:185
uint32_t val
Definition: h264dec.h:280
int cabac_init_idc
Definition: h264dec.h:326
int b_stride
Definition: h264dec.h:407
Context Adaptive Binary Arithmetic Coder.
static av_always_inline void write_back_intra_pred_mode(const H264Context *h, H264SliceContext *sl)
Definition: h264dec.h:711
#define H264_MAX_PICTURE_COUNT
Definition: h264dec.h:52
#define MAX_MMCO_COUNT
Definition: h264dec.h:54
int short_ref_count
number of actual short term references
Definition: h264dec.h:485