GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hevc_refs.c Lines: 257 292 88.0 %
Date: 2020-09-28 00:47:38 Branches: 181 222 81.5 %

Line Branch Exec Source
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
#include "libavutil/pixdesc.h"
26
27
#include "internal.h"
28
#include "thread.h"
29
#include "hevc.h"
30
#include "hevcdec.h"
31
32
337378
void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
33
{
34
    /* frame->frame can be NULL if context init failed */
35

337378
    if (!frame->frame || !frame->frame->buf[0])
36
272512
        return;
37
38
64866
    frame->flags &= ~flags;
39
64866
    if (!frame->flags) {
40
9589
        ff_thread_release_buffer(s->avctx, &frame->tf);
41
42
9589
        av_buffer_unref(&frame->tab_mvf_buf);
43
9589
        frame->tab_mvf = NULL;
44
45
9589
        av_buffer_unref(&frame->rpl_buf);
46
9589
        av_buffer_unref(&frame->rpl_tab_buf);
47
9589
        frame->rpl_tab    = NULL;
48
9589
        frame->refPicList = NULL;
49
50
9589
        frame->collocated_ref = NULL;
51
52
9589
        av_buffer_unref(&frame->hwaccel_priv_buf);
53
9589
        frame->hwaccel_picture_private = NULL;
54
    }
55
}
56
57
4566559
RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
58
{
59
4566559
    int x_cb         = x0 >> s->ps.sps->log2_ctb_size;
60
4566559
    int y_cb         = y0 >> s->ps.sps->log2_ctb_size;
61
4566559
    int pic_width_cb = s->ps.sps->ctb_width;
62
4566559
    int ctb_addr_ts  = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
63
4566559
    return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
64
}
65
66
735
void ff_hevc_clear_refs(HEVCContext *s)
67
{
68
    int i;
69
24255
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
70
23520
        ff_hevc_unref_frame(s, &s->DPB[i],
71
                            HEVC_FRAME_FLAG_SHORT_REF |
72
                            HEVC_FRAME_FLAG_LONG_REF);
73
735
}
74
75
void ff_hevc_flush_dpb(HEVCContext *s)
76
{
77
    int i;
78
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
79
        ff_hevc_unref_frame(s, &s->DPB[i], ~0);
80
}
81
82
9522
static HEVCFrame *alloc_frame(HEVCContext *s)
83
{
84
    int i, j, ret;
85
33616
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
86
33616
        HEVCFrame *frame = &s->DPB[i];
87
33616
        if (frame->frame->buf[0])
88
24094
            continue;
89
90
9522
        ret = ff_thread_get_buffer(s->avctx, &frame->tf,
91
                                   AV_GET_BUFFER_FLAG_REF);
92
9522
        if (ret < 0)
93
            return NULL;
94
95
9522
        frame->rpl_buf = av_buffer_allocz(s->pkt.nb_nals * sizeof(RefPicListTab));
96
9522
        if (!frame->rpl_buf)
97
            goto fail;
98
99
9522
        frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
100
9522
        if (!frame->tab_mvf_buf)
101
            goto fail;
102
9522
        frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
103
104
9522
        frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
105
9522
        if (!frame->rpl_tab_buf)
106
            goto fail;
107
9522
        frame->rpl_tab   = (RefPicListTab **)frame->rpl_tab_buf->data;
108
9522
        frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height;
109
1392667
        for (j = 0; j < frame->ctb_count; j++)
110
1383145
            frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
111
112
9522
        frame->frame->top_field_first  = s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
113

9522
        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);
114
115
9522
        if (s->avctx->hwaccel) {
116
            const AVHWAccel *hwaccel = s->avctx->hwaccel;
117
            av_assert0(!frame->hwaccel_picture_private);
118
            if (hwaccel->frame_priv_data_size) {
119
                frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
120
                if (!frame->hwaccel_priv_buf)
121
                    goto fail;
122
                frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
123
            }
124
        }
125
126
9522
        return frame;
127
fail:
128
        ff_hevc_unref_frame(s, frame, ~0);
129
        return NULL;
130
    }
131
    av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
132
    return NULL;
133
}
134
135
9480
int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
136
{
137
    HEVCFrame *ref;
138
    int i;
139
140
    /* check that this POC doesn't already exist */
141
312840
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
142
303360
        HEVCFrame *frame = &s->DPB[i];
143
144

303360
        if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
145
45311
            frame->poc == poc) {
146
            av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
147
                   poc);
148
            return AVERROR_INVALIDDATA;
149
        }
150
    }
151
152
9480
    ref = alloc_frame(s);
153
9480
    if (!ref)
154
        return AVERROR(ENOMEM);
155
156
9480
    *frame = ref->frame;
157
9480
    s->ref = ref;
158
159
9480
    if (s->sh.pic_output_flag)
160
9474
        ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
161
    else
162
6
        ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
163
164
9480
    ref->poc      = poc;
165
9480
    ref->sequence = s->seq_decode;
166
9480
    ref->frame->crop_left   = s->ps.sps->output_window.left_offset;
167
9480
    ref->frame->crop_right  = s->ps.sps->output_window.right_offset;
168
9480
    ref->frame->crop_top    = s->ps.sps->output_window.top_offset;
169
9480
    ref->frame->crop_bottom = s->ps.sps->output_window.bottom_offset;
170
171
9480
    return 0;
172
}
173
174
10697
int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
175
{
176
749
    do {
177
10697
        int nb_output = 0;
178
10697
        int min_poc   = INT_MAX;
179
        int i, min_idx, ret;
180
181

10697
        if (s->sh.no_output_of_prior_pics_flag == 1 && s->no_rasl_output_flag == 1) {
182
1155
            for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
183
1120
                HEVCFrame *frame = &s->DPB[i];
184

1120
                if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
185
656
                        frame->sequence == s->seq_output) {
186
176
                    ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
187
                }
188
            }
189
        }
190
191
353001
        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
192
342304
            HEVCFrame *frame = &s->DPB[i];
193
342304
            if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
194
32729
                frame->sequence == s->seq_output) {
195
31830
                nb_output++;
196

31830
                if (frame->poc < min_poc || nb_output == 1) {
197
16784
                    min_poc = frame->poc;
198
16784
                    min_idx = i;
199
                }
200
            }
201
        }
202
203
        /* wait for more frames before output */
204

10697
        if (!flush && s->seq_output == s->seq_decode && s->ps.sps &&
205
9436
            nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics)
206
448
            return 0;
207
208
10249
        if (nb_output) {
209
9330
            HEVCFrame *frame = &s->DPB[min_idx];
210
211
9330
            ret = av_frame_ref(out, frame->frame);
212
9330
            if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
213
2039
                ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING);
214
            else
215
7291
                ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
216
9330
            if (ret < 0)
217
                return ret;
218
219
9330
            av_log(s->avctx, AV_LOG_DEBUG,
220
                   "Output frame with POC %d.\n", frame->poc);
221
9330
            return 1;
222
        }
223
224
919
        if (s->seq_output != s->seq_decode)
225
749
            s->seq_output = (s->seq_output + 1) & 0xff;
226
        else
227
170
            break;
228
    } while (1);
229
230
170
    return 0;
231
}
232
233
8949
void ff_hevc_bump_frame(HEVCContext *s)
234
{
235
8949
    int dpb = 0;
236
8949
    int min_poc = INT_MAX;
237
    int i;
238
239
295317
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
240
286368
        HEVCFrame *frame = &s->DPB[i];
241
286368
        if ((frame->flags) &&
242
47521
            frame->sequence == s->seq_output &&
243
47405
            frame->poc != s->poc) {
244
38493
            dpb++;
245
        }
246
    }
247
248

8949
    if (s->ps.sps && dpb >= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].max_dec_pic_buffering) {
249
56001
        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
250
54304
            HEVCFrame *frame = &s->DPB[i];
251
54304
            if ((frame->flags) &&
252
10318
                frame->sequence == s->seq_output &&
253
10318
                frame->poc != s->poc) {
254

8621
                if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
255
1444
                    min_poc = frame->poc;
256
                }
257
            }
258
        }
259
260
56001
        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
261
54304
            HEVCFrame *frame = &s->DPB[i];
262
54304
            if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
263
6790
                frame->sequence == s->seq_output &&
264
6790
                frame->poc <= min_poc) {
265
2789
                frame->flags |= HEVC_FRAME_FLAG_BUMPING;
266
            }
267
        }
268
269
1697
        dpb--;
270
    }
271
8949
}
272
273
18398
static int init_slice_rpl(HEVCContext *s)
274
{
275
18398
    HEVCFrame *frame = s->ref;
276
18398
    int ctb_count    = frame->ctb_count;
277
18398
    int ctb_addr_ts  = s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
278
    int i;
279
280
18398
    if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
281
        return AVERROR_INVALIDDATA;
282
283
1972888
    for (i = ctb_addr_ts; i < ctb_count; i++)
284
1954490
        frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
285
286
18398
    frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
287
288
18398
    return 0;
289
}
290
291
18398
int ff_hevc_slice_rpl(HEVCContext *s)
292
{
293
18398
    SliceHeader *sh = &s->sh;
294
295
18398
    uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
296
    uint8_t list_idx;
297
    int i, j, ret;
298
299
18398
    ret = init_slice_rpl(s);
300
18398
    if (ret < 0)
301
        return ret;
302
303
18398
    if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
304
18398
          s->rps[LT_CURR].nb_refs)) {
305
        av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
306
        return AVERROR_INVALIDDATA;
307
    }
308
309
51456
    for (list_idx = 0; list_idx < nb_list; list_idx++) {
310
33058
        RefPicList  rpl_tmp = { { 0 } };
311
33058
        RefPicList *rpl     = &s->ref->refPicList[list_idx];
312
313
        /* The order of the elements is
314
         * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
315
         * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
316
33058
        int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
317
33058
                              list_idx ? ST_CURR_BEF : ST_CURR_AFT,
318
                              LT_CURR };
319
320
        /* concatenate the candidate lists for the current frame */
321
66134
        while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
322
132304
            for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
323
99228
                RefPicList *rps = &s->rps[cand_lists[i]];
324

218869
                for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < HEVC_MAX_REFS; j++) {
325
119641
                    rpl_tmp.list[rpl_tmp.nb_refs]       = rps->list[j];
326
119641
                    rpl_tmp.ref[rpl_tmp.nb_refs]        = rps->ref[j];
327
119641
                    rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
328
119641
                    rpl_tmp.nb_refs++;
329
                }
330
            }
331
        }
332
333
        /* reorder the references if necessary */
334
33058
        if (sh->rpl_modification_flag[list_idx]) {
335
6160
            for (i = 0; i < sh->nb_refs[list_idx]; i++) {
336
4333
                int idx = sh->list_entry_lx[list_idx][i];
337
338
4333
                if (idx >= rpl_tmp.nb_refs) {
339
                    av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
340
                    return AVERROR_INVALIDDATA;
341
                }
342
343
4333
                rpl->list[i]       = rpl_tmp.list[idx];
344
4333
                rpl->ref[i]        = rpl_tmp.ref[idx];
345
4333
                rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
346
4333
                rpl->nb_refs++;
347
            }
348
        } else {
349
31231
            memcpy(rpl, &rpl_tmp, sizeof(*rpl));
350
31231
            rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
351
        }
352
353
33058
        if (sh->collocated_list == list_idx &&
354
18398
            sh->collocated_ref_idx < rpl->nb_refs)
355
18398
            s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
356
    }
357
358
18398
    return 0;
359
}
360
361
35036
static HEVCFrame *find_ref_idx(HEVCContext *s, int poc, uint8_t use_msb)
362
{
363
35036
    int mask = use_msb ? ~0 : (1 << s->ps.sps->log2_max_poc_lsb) - 1;
364
    int i;
365
366
151690
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
367
151648
        HEVCFrame *ref = &s->DPB[i];
368

151648
        if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
369
144415
            if ((ref->poc & mask) == poc)
370
34994
                return ref;
371
        }
372
    }
373
374


42
    if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s))
375
7
        av_log(s->avctx, AV_LOG_ERROR,
376
               "Could not find ref with POC %d\n", poc);
377
42
    return NULL;
378
}
379
380
317508
static void mark_ref(HEVCFrame *frame, int flag)
381
{
382
317508
    frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
383
317508
    frame->flags |= flag;
384
317508
}
385
386
42
static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
387
{
388
    HEVCFrame *frame;
389
    int i, y;
390
391
42
    frame = alloc_frame(s);
392
42
    if (!frame)
393
        return NULL;
394
395
42
    if (!s->avctx->hwaccel) {
396
42
        if (!s->ps.sps->pixel_shift) {
397
120
            for (i = 0; frame->frame->buf[i]; i++)
398
90
                memset(frame->frame->buf[i]->data, 1 << (s->ps.sps->bit_depth - 1),
399
90
                       frame->frame->buf[i]->size);
400
        } else {
401
48
            for (i = 0; frame->frame->data[i]; i++)
402
19620
                for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++) {
403
19584
                    uint8_t *dst = frame->frame->data[i] + y * frame->frame->linesize[i];
404
19584
                    AV_WN16(dst, 1 << (s->ps.sps->bit_depth - 1));
405
19584
                    av_memcpy_backptr(dst + 2, 2, 2*(s->ps.sps->width >> s->ps.sps->hshift[i]) - 2);
406
                }
407
        }
408
    }
409
410
42
    frame->poc      = poc;
411
42
    frame->sequence = s->seq_decode;
412
42
    frame->flags    = 0;
413
414
42
    if (s->threads_type == FF_THREAD_FRAME)
415
        ff_thread_report_progress(&frame->tf, INT_MAX, 0);
416
417
42
    return frame;
418
}
419
420
/* add a reference with the given poc to the list and mark it as used in DPB */
421
35036
static int add_candidate_ref(HEVCContext *s, RefPicList *list,
422
                             int poc, int ref_flag, uint8_t use_msb)
423
{
424
35036
    HEVCFrame *ref = find_ref_idx(s, poc, use_msb);
425
426

35036
    if (ref == s->ref || list->nb_refs >= HEVC_MAX_REFS)
427
        return AVERROR_INVALIDDATA;
428
429
35036
    if (!ref) {
430
42
        ref = generate_missing_ref(s, poc);
431
42
        if (!ref)
432
            return AVERROR(ENOMEM);
433
    }
434
435
35036
    list->list[list->nb_refs] = ref->poc;
436
35036
    list->ref[list->nb_refs]  = ref;
437
35036
    list->nb_refs++;
438
439
35036
    mark_ref(ref, ref_flag);
440
35036
    return 0;
441
}
442
443
9480
int ff_hevc_frame_rps(HEVCContext *s)
444
{
445
9480
    const ShortTermRPS *short_rps = s->sh.short_term_rps;
446
9480
    const LongTermRPS  *long_rps  = &s->sh.long_term_rps;
447
9480
    RefPicList               *rps = s->rps;
448
9480
    int i, ret = 0;
449
450
9480
    if (!short_rps) {
451
368
        rps[0].nb_refs = rps[1].nb_refs = 0;
452
368
        return 0;
453
    }
454
455
    /* clear the reference flags on all frames except the current one */
456
300696
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
457
291584
        HEVCFrame *frame = &s->DPB[i];
458
459
291584
        if (frame == s->ref)
460
9112
            continue;
461
462
282472
        mark_ref(frame, 0);
463
    }
464
465
54672
    for (i = 0; i < NB_RPS_TYPE; i++)
466
45560
        rps[i].nb_refs = 0;
467
468
    /* add the short refs */
469
42588
    for (i = 0; i < short_rps->num_delta_pocs; i++) {
470
33476
        int poc = s->poc + short_rps->delta_poc[i];
471
        int list;
472
473
33476
        if (!short_rps->used[i])
474
1711
            list = ST_FOLL;
475
31765
        else if (i < short_rps->num_negative_pics)
476
23170
            list = ST_CURR_BEF;
477
        else
478
8595
            list = ST_CURR_AFT;
479
480
33476
        ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF, 1);
481
33476
        if (ret < 0)
482
            goto fail;
483
    }
484
485
    /* add the long refs */
486
10672
    for (i = 0; i < long_rps->nb_refs; i++) {
487
1560
        int poc  = long_rps->poc[i];
488
1560
        int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
489
490
1560
        ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF, long_rps->poc_msb_present[i]);
491
1560
        if (ret < 0)
492
            goto fail;
493
    }
494
495
9112
fail:
496
    /* release any frames that are now unused */
497
300696
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
498
291584
        ff_hevc_unref_frame(s, &s->DPB[i], 0);
499
500
9112
    return ret;
501
}
502
503
18427
int ff_hevc_frame_nb_refs(const HEVCContext *s)
504
{
505
18427
    int ret = 0;
506
    int i;
507
18427
    const ShortTermRPS *rps = s->sh.short_term_rps;
508
18427
    const LongTermRPS *long_rps = &s->sh.long_term_rps;
509
510
18427
    if (rps) {
511
63691
        for (i = 0; i < rps->num_negative_pics; i++)
512
45264
            ret += !!rps->used[i];
513
38691
        for (; i < rps->num_delta_pocs; i++)
514
20264
            ret += !!rps->used[i];
515
    }
516
517
18427
    if (long_rps) {
518
19846
        for (i = 0; i < long_rps->nb_refs; i++)
519
1419
            ret += !!long_rps->used[i];
520
    }
521
18427
    return ret;
522
}