FFmpeg
hevc_refs.c
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1 /*
2  * HEVC video decoder
3  *
4  * Copyright (C) 2012 - 2013 Guillaume Martres
5  * Copyright (C) 2012 - 2013 Gildas Cocherel
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "libavutil/avassert.h"
25 
26 #include "thread.h"
27 #include "hevc.h"
28 #include "hevcdec.h"
29 #include "threadframe.h"
30 
32 {
33  /* frame->frame can be NULL if context init failed */
34  if (!frame->frame || !frame->frame->buf[0])
35  return;
36 
37  frame->flags &= ~flags;
38  if (!frame->flags) {
39  ff_thread_release_ext_buffer(s->avctx, &frame->tf);
40  ff_thread_release_buffer(s->avctx, frame->frame_grain);
41  frame->needs_fg = 0;
42 
43  av_buffer_unref(&frame->tab_mvf_buf);
44  frame->tab_mvf = NULL;
45 
46  av_buffer_unref(&frame->rpl_buf);
47  av_buffer_unref(&frame->rpl_tab_buf);
48  frame->rpl_tab = NULL;
49  frame->refPicList = NULL;
50 
51  frame->collocated_ref = NULL;
52 
53  av_buffer_unref(&frame->hwaccel_priv_buf);
54  frame->hwaccel_picture_private = NULL;
55  }
56 }
57 
59  const HEVCFrame *ref, int x0, int y0)
60 {
61  int x_cb = x0 >> s->ps.sps->log2_ctb_size;
62  int y_cb = y0 >> s->ps.sps->log2_ctb_size;
63  int pic_width_cb = s->ps.sps->ctb_width;
64  int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
65  return &ref->rpl_tab[ctb_addr_ts]->refPicList[0];
66 }
67 
69 {
70  int i;
71  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
72  ff_hevc_unref_frame(s, &s->DPB[i],
75 }
76 
78 {
79  int i;
80  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
81  ff_hevc_unref_frame(s, &s->DPB[i], ~0);
82 }
83 
85 {
86  int i, j, ret;
87  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
88  HEVCFrame *frame = &s->DPB[i];
89  if (frame->frame->buf[0])
90  continue;
91 
92  ret = ff_thread_get_ext_buffer(s->avctx, &frame->tf,
94  if (ret < 0)
95  return NULL;
96 
97  frame->rpl_buf = av_buffer_allocz(s->pkt.nb_nals * sizeof(RefPicListTab));
98  if (!frame->rpl_buf)
99  goto fail;
100 
101  frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
102  if (!frame->tab_mvf_buf)
103  goto fail;
104  frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
105 
106  frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
107  if (!frame->rpl_tab_buf)
108  goto fail;
109  frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
110  frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height;
111  for (j = 0; j < frame->ctb_count; j++)
112  frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
113 
114  frame->frame->top_field_first = s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
115  frame->frame->interlaced_frame = (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
116 
117  if (s->avctx->hwaccel) {
118  const AVHWAccel *hwaccel = s->avctx->hwaccel;
119  av_assert0(!frame->hwaccel_picture_private);
120  if (hwaccel->frame_priv_data_size) {
121  frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
122  if (!frame->hwaccel_priv_buf)
123  goto fail;
124  frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
125  }
126  }
127 
128  return frame;
129 fail:
131  return NULL;
132  }
133  av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
134  return NULL;
135 }
136 
138 {
139  HEVCFrame *ref;
140  int i;
141 
142  /* check that this POC doesn't already exist */
143  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
144  HEVCFrame *frame = &s->DPB[i];
145 
146  if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
147  frame->poc == poc) {
148  av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
149  poc);
150  return AVERROR_INVALIDDATA;
151  }
152  }
153 
154  ref = alloc_frame(s);
155  if (!ref)
156  return AVERROR(ENOMEM);
157 
158  *frame = ref->frame;
159  s->ref = ref;
160 
161  if (s->sh.pic_output_flag)
163  else
165 
166  ref->poc = poc;
167  ref->sequence = s->seq_decode;
168  ref->frame->crop_left = s->ps.sps->output_window.left_offset;
169  ref->frame->crop_right = s->ps.sps->output_window.right_offset;
170  ref->frame->crop_top = s->ps.sps->output_window.top_offset;
171  ref->frame->crop_bottom = s->ps.sps->output_window.bottom_offset;
172 
173  return 0;
174 }
175 
177 {
178  for (int i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
179  HEVCFrame *frame = &s->DPB[i];
180  if (frame->sequence == HEVC_SEQUENCE_COUNTER_INVALID) {
182  }
183  }
184 }
185 
187 {
188  if (IS_IRAP(s) && s->no_rasl_output_flag == 1) {
190  for (int i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
191  HEVCFrame *frame = &s->DPB[i];
192  if ((frame->flags & mask) == HEVC_FRAME_FLAG_OUTPUT &&
193  frame->sequence != s->seq_decode) {
194  if (s->sh.no_output_of_prior_pics_flag == 1)
196  else
197  frame->flags |= HEVC_FRAME_FLAG_BUMPING;
198  }
199  }
200  }
201  do {
202  int nb_output = 0;
203  int min_poc = INT_MAX;
204  int i, min_idx, ret;
205 
206  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
207  HEVCFrame *frame = &s->DPB[i];
208  if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
209  frame->sequence == s->seq_output) {
210  nb_output++;
211  if (frame->poc < min_poc || nb_output == 1) {
212  min_poc = frame->poc;
213  min_idx = i;
214  }
215  }
216  }
217 
218  /* wait for more frames before output */
219  if (!flush && s->seq_output == s->seq_decode && s->ps.sps &&
220  nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics)
221  return 0;
222 
223  if (nb_output) {
224  HEVCFrame *frame = &s->DPB[min_idx];
225 
226  ret = av_frame_ref(out, frame->needs_fg ? frame->frame_grain : frame->frame);
227  if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
229  else
231  if (ret < 0)
232  return ret;
233 
234  if (frame->needs_fg && (ret = av_frame_copy_props(out, frame->frame)) < 0)
235  return ret;
236 
237  if (!(s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))
239 
240  av_log(s->avctx, AV_LOG_DEBUG,
241  "Output frame with POC %d.\n", frame->poc);
242  return 1;
243  }
244 
245  if (s->seq_output != s->seq_decode)
246  s->seq_output = (s->seq_output + 1) & HEVC_SEQUENCE_COUNTER_MASK;
247  else
248  break;
249  } while (1);
250 
251  return 0;
252 }
253 
255 {
256  int dpb = 0;
257  int min_poc = INT_MAX;
258  int i;
259 
260  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
261  HEVCFrame *frame = &s->DPB[i];
262  if ((frame->flags) &&
263  frame->sequence == s->seq_output &&
264  frame->poc != s->poc) {
265  dpb++;
266  }
267  }
268 
269  if (s->ps.sps && dpb >= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].max_dec_pic_buffering) {
270  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
271  HEVCFrame *frame = &s->DPB[i];
272  if ((frame->flags) &&
273  frame->sequence == s->seq_output &&
274  frame->poc != s->poc) {
275  if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
276  min_poc = frame->poc;
277  }
278  }
279  }
280 
281  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
282  HEVCFrame *frame = &s->DPB[i];
283  if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
284  frame->sequence == s->seq_output &&
285  frame->poc <= min_poc) {
286  frame->flags |= HEVC_FRAME_FLAG_BUMPING;
287  }
288  }
289 
290  dpb--;
291  }
292 }
293 
295 {
296  HEVCFrame *frame = s->ref;
297  int ctb_count = frame->ctb_count;
298  int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
299  int i;
300 
301  if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
302  return AVERROR_INVALIDDATA;
303 
304  for (i = ctb_addr_ts; i < ctb_count; i++)
305  frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
306 
307  frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
308 
309  return 0;
310 }
311 
313 {
314  SliceHeader *sh = &s->sh;
315 
316  uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
317  uint8_t list_idx;
318  int i, j, ret;
319 
320  ret = init_slice_rpl(s);
321  if (ret < 0)
322  return ret;
323 
324  if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
325  s->rps[LT_CURR].nb_refs)) {
326  av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
327  return AVERROR_INVALIDDATA;
328  }
329 
330  for (list_idx = 0; list_idx < nb_list; list_idx++) {
331  RefPicList rpl_tmp = { { 0 } };
332  RefPicList *rpl = &s->ref->refPicList[list_idx];
333 
334  /* The order of the elements is
335  * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
336  * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
337  int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
338  list_idx ? ST_CURR_BEF : ST_CURR_AFT,
339  LT_CURR };
340 
341  /* concatenate the candidate lists for the current frame */
342  while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
343  for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
344  RefPicList *rps = &s->rps[cand_lists[i]];
345  for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < HEVC_MAX_REFS; j++) {
346  rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
347  rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
348  rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
349  rpl_tmp.nb_refs++;
350  }
351  }
352  }
353 
354  /* reorder the references if necessary */
355  if (sh->rpl_modification_flag[list_idx]) {
356  for (i = 0; i < sh->nb_refs[list_idx]; i++) {
357  int idx = sh->list_entry_lx[list_idx][i];
358 
359  if (idx >= rpl_tmp.nb_refs) {
360  av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
361  return AVERROR_INVALIDDATA;
362  }
363 
364  rpl->list[i] = rpl_tmp.list[idx];
365  rpl->ref[i] = rpl_tmp.ref[idx];
366  rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
367  rpl->nb_refs++;
368  }
369  } else {
370  memcpy(rpl, &rpl_tmp, sizeof(*rpl));
371  rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
372  }
373 
374  if (sh->collocated_list == list_idx &&
375  sh->collocated_ref_idx < rpl->nb_refs)
376  s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
377  }
378 
379  return 0;
380 }
381 
382 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc, uint8_t use_msb)
383 {
384  int mask = use_msb ? ~0 : (1 << s->ps.sps->log2_max_poc_lsb) - 1;
385  int i;
386 
387  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
388  HEVCFrame *ref = &s->DPB[i];
389  if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
390  if ((ref->poc & mask) == poc && (use_msb || ref->poc != s->poc))
391  return ref;
392  }
393  }
394 
395  if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s))
396  av_log(s->avctx, AV_LOG_ERROR,
397  "Could not find ref with POC %d\n", poc);
398  return NULL;
399 }
400 
401 static void mark_ref(HEVCFrame *frame, int flag)
402 {
404  frame->flags |= flag;
405 }
406 
408 {
409  HEVCFrame *frame;
410  int i, y;
411 
412  frame = alloc_frame(s);
413  if (!frame)
414  return NULL;
415 
416  if (!s->avctx->hwaccel) {
417  if (!s->ps.sps->pixel_shift) {
418  for (i = 0; frame->frame->data[i]; i++)
419  memset(frame->frame->data[i], 1 << (s->ps.sps->bit_depth - 1),
420  frame->frame->linesize[i] * AV_CEIL_RSHIFT(s->ps.sps->height, s->ps.sps->vshift[i]));
421  } else {
422  for (i = 0; frame->frame->data[i]; i++)
423  for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++) {
424  uint8_t *dst = frame->frame->data[i] + y * frame->frame->linesize[i];
425  AV_WN16(dst, 1 << (s->ps.sps->bit_depth - 1));
426  av_memcpy_backptr(dst + 2, 2, 2*(s->ps.sps->width >> s->ps.sps->hshift[i]) - 2);
427  }
428  }
429  }
430 
431  frame->poc = poc;
433  frame->flags = 0;
434 
435  if (s->threads_type == FF_THREAD_FRAME)
436  ff_thread_report_progress(&frame->tf, INT_MAX, 0);
437 
438  return frame;
439 }
440 
441 /* add a reference with the given poc to the list and mark it as used in DPB */
443  int poc, int ref_flag, uint8_t use_msb)
444 {
445  HEVCFrame *ref = find_ref_idx(s, poc, use_msb);
446 
447  if (ref == s->ref || list->nb_refs >= HEVC_MAX_REFS)
448  return AVERROR_INVALIDDATA;
449 
450  if (!ref) {
451  ref = generate_missing_ref(s, poc);
452  if (!ref)
453  return AVERROR(ENOMEM);
454  }
455 
456  list->list[list->nb_refs] = ref->poc;
457  list->ref[list->nb_refs] = ref;
458  list->nb_refs++;
459 
460  mark_ref(ref, ref_flag);
461  return 0;
462 }
463 
465 {
466  const ShortTermRPS *short_rps = s->sh.short_term_rps;
467  const LongTermRPS *long_rps = &s->sh.long_term_rps;
468  RefPicList *rps = s->rps;
469  int i, ret = 0;
470 
471  if (!short_rps) {
472  rps[0].nb_refs = rps[1].nb_refs = 0;
473  return 0;
474  }
475 
477 
478  /* clear the reference flags on all frames except the current one */
479  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
480  HEVCFrame *frame = &s->DPB[i];
481 
482  if (frame == s->ref)
483  continue;
484 
485  mark_ref(frame, 0);
486  }
487 
488  for (i = 0; i < NB_RPS_TYPE; i++)
489  rps[i].nb_refs = 0;
490 
491  /* add the short refs */
492  for (i = 0; i < short_rps->num_delta_pocs; i++) {
493  int poc = s->poc + short_rps->delta_poc[i];
494  int list;
495 
496  if (!short_rps->used[i])
497  list = ST_FOLL;
498  else if (i < short_rps->num_negative_pics)
499  list = ST_CURR_BEF;
500  else
501  list = ST_CURR_AFT;
502 
504  if (ret < 0)
505  goto fail;
506  }
507 
508  /* add the long refs */
509  for (i = 0; i < long_rps->nb_refs; i++) {
510  int poc = long_rps->poc[i];
511  int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
512 
514  if (ret < 0)
515  goto fail;
516  }
517 
518 fail:
519  /* release any frames that are now unused */
520  for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
521  ff_hevc_unref_frame(s, &s->DPB[i], 0);
522 
523  return ret;
524 }
525 
527 {
528  int ret = 0;
529  int i;
530  const ShortTermRPS *rps = s->sh.short_term_rps;
531  const LongTermRPS *long_rps = &s->sh.long_term_rps;
532 
533  if (rps) {
534  for (i = 0; i < rps->num_negative_pics; i++)
535  ret += !!rps->used[i];
536  for (; i < rps->num_delta_pocs; i++)
537  ret += !!rps->used[i];
538  }
539 
540  if (long_rps) {
541  for (i = 0; i < long_rps->nb_refs; i++)
542  ret += !!long_rps->used[i];
543  }
544  return ret;
545 }
ShortTermRPS::used
uint8_t used[32]
Definition: hevc_ps.h:39
LT_FOLL
@ LT_FOLL
Definition: hevcdec.h:85
AVERROR
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 all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ff_hevc_get_ref_list
const RefPicList * ff_hevc_get_ref_list(const HEVCContext *s, const HEVCFrame *ref, int x0, int y0)
Definition: hevc_refs.c:58
ff_thread_release_ext_buffer
void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f)
Unref a ThreadFrame.
Definition: pthread_frame.c:1141
out
FILE * out
Definition: movenc.c:54
find_ref_idx
static HEVCFrame * find_ref_idx(HEVCContext *s, int poc, uint8_t use_msb)
Definition: hevc_refs.c:382
AV_FRAME_DATA_FILM_GRAIN_PARAMS
@ AV_FRAME_DATA_FILM_GRAIN_PARAMS
Film grain parameters for a frame, described by AVFilmGrainParams.
Definition: frame.h:184
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
RefPicList
Definition: hevcdec.h:241
thread.h
HEVC_MAX_REFS
@ HEVC_MAX_REFS
Definition: hevc.h:119
add_candidate_ref
static int add_candidate_ref(HEVCContext *s, RefPicList *list, int poc, int ref_flag, uint8_t use_msb)
Definition: hevc_refs.c:442
AVHWAccel
Definition: avcodec.h:2076
HEVC_FRAME_FLAG_LONG_REF
#define HEVC_FRAME_FLAG_LONG_REF
Definition: hevcdec.h:395
ff_hevc_clear_refs
void ff_hevc_clear_refs(HEVCContext *s)
Mark all frames in DPB as unused for reference.
Definition: hevc_refs.c:68
fail
#define fail()
Definition: checkasm.h:131
mark_ref
static void mark_ref(HEVCFrame *frame, int flag)
Definition: hevc_refs.c:401
ff_hevc_output_frame
int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
Find next frame in output order and put a reference to it in frame.
Definition: hevc_refs.c:186
RefPicList::nb_refs
int nb_refs
Definition: hevcdec.h:245
ShortTermRPS::num_delta_pocs
int num_delta_pocs
Definition: hevc_ps.h:36
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
HEVC_SEQUENCE_COUNTER_INVALID
#define HEVC_SEQUENCE_COUNTER_INVALID
Definition: hevcdec.h:399
ff_thread_report_progress
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
Definition: pthread_frame.c:595
HEVC_FRAME_FLAG_BUMPING
#define HEVC_FRAME_FLAG_BUMPING
Definition: hevcdec.h:396
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_memcpy_backptr
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
Definition: mem.c:455
av_buffer_pool_get
AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)
Allocate a new AVBuffer, reusing an old buffer from the pool when available.
Definition: buffer.c:384
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:50
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:376
init_slice_rpl
static int init_slice_rpl(HEVCContext *s)
Definition: hevc_refs.c:294
ff_hevc_set_new_ref
int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
Definition: hevc_refs.c:137
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
HEVC_FRAME_FLAG_SHORT_REF
#define HEVC_FRAME_FLAG_SHORT_REF
Definition: hevcdec.h:394
ff_hevc_slice_rpl
int ff_hevc_slice_rpl(HEVCContext *s)
Construct the reference picture list(s) for the current slice.
Definition: hevc_refs.c:312
RefPicList::ref
struct HEVCFrame * ref[HEVC_MAX_REFS]
Definition: hevcdec.h:242
SliceHeader::collocated_list
uint8_t collocated_list
Definition: hevcdec.h:290
generate_missing_ref
static HEVCFrame * generate_missing_ref(HEVCContext *s, int poc)
Definition: hevc_refs.c:407
AV_PICTURE_STRUCTURE_BOTTOM_FIELD
@ AV_PICTURE_STRUCTURE_BOTTOM_FIELD
Definition: avcodec.h:2796
threadframe.h
IS_BLA
#define IS_BLA(s)
Definition: hevcdec.h:76
HEVC_SLICE_B
@ HEVC_SLICE_B
Definition: hevc.h:96
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:606
NULL
#define NULL
Definition: coverity.c:32
HEVC_SEQUENCE_COUNTER_MASK
#define HEVC_SEQUENCE_COUNTER_MASK
Definition: hevcdec.h:398
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:603
av_buffer_unref
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
Definition: buffer.c:139
LongTermRPS::poc
int poc[32]
Definition: hevcdec.h:235
AV_PICTURE_STRUCTURE_TOP_FIELD
@ AV_PICTURE_STRUCTURE_TOP_FIELD
Definition: avcodec.h:2795
list
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
Definition: filter_design.txt:25
LongTermRPS::poc_msb_present
uint8_t poc_msb_present[32]
Definition: hevcdec.h:236
HEVC_NAL_CRA_NUT
@ HEVC_NAL_CRA_NUT
Definition: hevc.h:50
RefPicListTab
Definition: hevcdec.h:248
SliceHeader::nb_refs
unsigned int nb_refs[2]
Definition: hevcdec.h:282
ff_hevc_frame_rps
int ff_hevc_frame_rps(HEVCContext *s)
Construct the reference picture sets for the current frame.
Definition: hevc_refs.c:464
IS_IRAP
#define IS_IRAP(s)
Definition: hevcdec.h:78
LongTermRPS::used
uint8_t used[32]
Definition: hevcdec.h:237
ST_FOLL
@ ST_FOLL
Definition: hevcdec.h:83
hevcdec.h
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:353
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
SliceHeader::collocated_ref_idx
unsigned int collocated_ref_idx
Definition: hevcdec.h:292
HEVC_FRAME_FLAG_OUTPUT
#define HEVC_FRAME_FLAG_OUTPUT
Definition: hevcdec.h:393
MvField
Definition: hevcdec.h:347
ff_hevc_unref_frame
void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
Definition: hevc_refs.c:31
alloc_frame
static HEVCFrame * alloc_frame(HEVCContext *s)
Definition: hevc_refs.c:84
av_frame_remove_side_data
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
Remove and free all side data instances of the given type.
Definition: frame.c:791
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1483
ff_thread_release_buffer
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
Definition: pthread_frame.c:1074
ShortTermRPS::num_negative_pics
unsigned int num_negative_pics
Definition: hevc_ps.h:35
flag
#define flag(name)
Definition: cbs_av1.c:553
SliceHeader
Definition: hevcdec.h:252
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
HEVCFrame
Definition: hevcdec.h:401
unref_missing_refs
static void unref_missing_refs(HEVCContext *s)
Definition: hevc_refs.c:176
RefPicList::list
int list[HEVC_MAX_REFS]
Definition: hevcdec.h:243
ff_hevc_bump_frame
void ff_hevc_bump_frame(HEVCContext *s)
Definition: hevc_refs.c:254
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
SliceHeader::list_entry_lx
unsigned int list_entry_lx[2][32]
Definition: hevcdec.h:276
ff_thread_get_ext_buffer
int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around ff_get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:1043
hevc.h
av_buffer_allocz
AVBufferRef * av_buffer_allocz(size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:93
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
ST_CURR_BEF
@ ST_CURR_BEF
Definition: hevcdec.h:81
ff_hevc_frame_nb_refs
int ff_hevc_frame_nb_refs(const HEVCContext *s)
Get the number of candidate references for the current frame.
Definition: hevc_refs.c:526
LongTermRPS
Definition: hevcdec.h:234
SliceHeader::slice_type
enum HEVCSliceType slice_type
Definition: hevcdec.h:260
ff_hevc_flush_dpb
void ff_hevc_flush_dpb(HEVCContext *s)
Drop all frames currently in DPB.
Definition: hevc_refs.c:77
LT_CURR
@ LT_CURR
Definition: hevcdec.h:84
NB_RPS_TYPE
@ NB_RPS_TYPE
Definition: hevcdec.h:86
HEVCContext
Definition: hevcdec.h:490
AVHWAccel::frame_priv_data_size
int frame_priv_data_size
Size of per-frame hardware accelerator private data.
Definition: avcodec.h:2185
SliceHeader::rpl_modification_flag
uint8_t rpl_modification_flag[2]
Definition: hevcdec.h:278
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
ShortTermRPS
Definition: hevc_ps.h:34
ST_CURR_AFT
@ ST_CURR_AFT
Definition: hevcdec.h:82
LongTermRPS::nb_refs
uint8_t nb_refs
Definition: hevcdec.h:238
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
ShortTermRPS::delta_poc
int32_t delta_poc[32]
Definition: hevc_ps.h:38
RefPicList::isLongTerm
int isLongTerm[HEVC_MAX_REFS]
Definition: hevcdec.h:244
AV_CODEC_EXPORT_DATA_FILM_GRAIN
#define AV_CODEC_EXPORT_DATA_FILM_GRAIN
Decoding only.
Definition: avcodec.h:371
AV_WN16
#define AV_WN16(p, v)
Definition: intreadwrite.h:372