GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/cbs_h2645.c Lines: 390 640 60.9 %
Date: 2021-01-21 21:11:50 Branches: 240 460 52.2 %

Line Branch Exec Source
1
/*
2
 * This file is part of FFmpeg.
3
 *
4
 * FFmpeg is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
6
 * License as published by the Free Software Foundation; either
7
 * version 2.1 of the License, or (at your option) any later version.
8
 *
9
 * FFmpeg is distributed in the hope that it will be useful,
10
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12
 * Lesser General Public License for more details.
13
 *
14
 * You should have received a copy of the GNU Lesser General Public
15
 * License along with FFmpeg; if not, write to the Free Software
16
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
 */
18
19
#include "libavutil/attributes.h"
20
#include "libavutil/avassert.h"
21
22
#include "bytestream.h"
23
#include "cbs.h"
24
#include "cbs_internal.h"
25
#include "cbs_h264.h"
26
#include "cbs_h265.h"
27
#include "h264.h"
28
#include "h264_sei.h"
29
#include "h2645_parse.h"
30
#include "hevc.h"
31
#include "hevc_sei.h"
32
33
34
69106
static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
35
                              const char *name, const int *subscripts,
36
                              uint32_t *write_to,
37
                              uint32_t range_min, uint32_t range_max)
38
{
39
    uint32_t value;
40
    int position, i, j;
41
    unsigned int k;
42
    char bits[65];
43
44
69106
    position = get_bits_count(gbc);
45
46
117141
    for (i = 0; i < 32; i++) {
47
117141
        if (get_bits_left(gbc) < i + 1) {
48
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
49
                   "%s: bitstream ended.\n", name);
50
            return AVERROR_INVALIDDATA;
51
        }
52
117141
        k = get_bits1(gbc);
53
117141
        bits[i] = k ? '1' : '0';
54
117141
        if (k)
55
69106
            break;
56
    }
57
69106
    if (i >= 32) {
58
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
59
               "%s: more than 31 zeroes.\n", name);
60
        return AVERROR_INVALIDDATA;
61
    }
62
69106
    value = 1;
63
117141
    for (j = 0; j < i; j++) {
64
48035
        k = get_bits1(gbc);
65
48035
        bits[i + j + 1] = k ? '1' : '0';
66
48035
        value = value << 1 | k;
67
    }
68
69106
    bits[i + j + 1] = 0;
69
69106
    --value;
70
71
69106
    if (ctx->trace_enable)
72
        ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
73
                                    bits, value);
74
75

69106
    if (value < range_min || value > range_max) {
76
        av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
77
               "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
78
               name, value, range_min, range_max);
79
        return AVERROR_INVALIDDATA;
80
    }
81
82
69106
    *write_to = value;
83
69106
    return 0;
84
}
85
86
75672
static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
87
                              const char *name, const int *subscripts,
88
                              int32_t *write_to,
89
                              int32_t range_min, int32_t range_max)
90
{
91
    int32_t value;
92
    int position, i, j;
93
    unsigned int k;
94
    uint32_t v;
95
    char bits[65];
96
97
75672
    position = get_bits_count(gbc);
98
99
267890
    for (i = 0; i < 32; i++) {
100
267890
        if (get_bits_left(gbc) < i + 1) {
101
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
102
                   "%s: bitstream ended.\n", name);
103
            return AVERROR_INVALIDDATA;
104
        }
105
267890
        k = get_bits1(gbc);
106
267890
        bits[i] = k ? '1' : '0';
107
267890
        if (k)
108
75672
            break;
109
    }
110
75672
    if (i >= 32) {
111
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
112
               "%s: more than 31 zeroes.\n", name);
113
        return AVERROR_INVALIDDATA;
114
    }
115
75672
    v = 1;
116
267890
    for (j = 0; j < i; j++) {
117
192218
        k = get_bits1(gbc);
118
192218
        bits[i + j + 1] = k ? '1' : '0';
119
192218
        v = v << 1 | k;
120
    }
121
75672
    bits[i + j + 1] = 0;
122
75672
    if (v & 1)
123
43754
        value = -(int32_t)(v / 2);
124
    else
125
31918
        value = v / 2;
126
127
75672
    if (ctx->trace_enable)
128
        ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
129
                                    bits, value);
130
131

75672
    if (value < range_min || value > range_max) {
132
        av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
133
               "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
134
               name, value, range_min, range_max);
135
        return AVERROR_INVALIDDATA;
136
    }
137
138
75672
    *write_to = value;
139
75672
    return 0;
140
}
141
142
52942
static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
143
                               const char *name, const int *subscripts,
144
                               uint32_t value,
145
                               uint32_t range_min, uint32_t range_max)
146
{
147
    int len;
148
149

52942
    if (value < range_min || value > range_max) {
150
        av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
151
               "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
152
               name, value, range_min, range_max);
153
        return AVERROR_INVALIDDATA;
154
    }
155
52942
    av_assert0(value != UINT32_MAX);
156
157
52942
    len = av_log2(value + 1);
158
52942
    if (put_bits_left(pbc) < 2 * len + 1)
159
        return AVERROR(ENOSPC);
160
161
52942
    if (ctx->trace_enable) {
162
        char bits[65];
163
        int i;
164
165
        for (i = 0; i < len; i++)
166
            bits[i] = '0';
167
        bits[len] = '1';
168
        for (i = 0; i < len; i++)
169
            bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
170
        bits[len + len + 1] = 0;
171
172
        ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
173
                                    name, subscripts, bits, value);
174
    }
175
176
52942
    put_bits(pbc, len, 0);
177
52942
    if (len + 1 < 32)
178
52942
        put_bits(pbc, len + 1, value + 1);
179
    else
180
        put_bits32(pbc, value + 1);
181
182
52942
    return 0;
183
}
184
185
68016
static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
186
                               const char *name, const int *subscripts,
187
                               int32_t value,
188
                               int32_t range_min, int32_t range_max)
189
{
190
    int len;
191
    uint32_t uvalue;
192
193

68016
    if (value < range_min || value > range_max) {
194
        av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
195
               "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
196
               name, value, range_min, range_max);
197
        return AVERROR_INVALIDDATA;
198
    }
199
68016
    av_assert0(value != INT32_MIN);
200
201
68016
    if (value == 0)
202
14028
        uvalue = 0;
203
53988
    else if (value > 0)
204
30568
        uvalue = 2 * (uint32_t)value - 1;
205
    else
206
23420
        uvalue = 2 * (uint32_t)-value;
207
208
68016
    len = av_log2(uvalue + 1);
209
68016
    if (put_bits_left(pbc) < 2 * len + 1)
210
        return AVERROR(ENOSPC);
211
212
68016
    if (ctx->trace_enable) {
213
        char bits[65];
214
        int i;
215
216
        for (i = 0; i < len; i++)
217
            bits[i] = '0';
218
        bits[len] = '1';
219
        for (i = 0; i < len; i++)
220
            bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0';
221
        bits[len + len + 1] = 0;
222
223
        ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
224
                                    name, subscripts, bits, value);
225
    }
226
227
68016
    put_bits(pbc, len, 0);
228
68016
    if (len + 1 < 32)
229
68016
        put_bits(pbc, len + 1, uvalue + 1);
230
    else
231
        put_bits32(pbc, uvalue + 1);
232
233
68016
    return 0;
234
}
235
236
// payload_extension_present() - true if we are before the last 1-bit
237
// in the payload structure, which must be in the last byte.
238
5
static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t payload_size,
239
                                              int cur_pos)
240
{
241
5
    int bits_left = payload_size * 8 - cur_pos;
242

5
    return (bits_left > 0 &&
243
            (bits_left > 7 || show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)));
244
}
245
246
#define HEADER(name) do { \
247
        ff_cbs_trace_header(ctx, name); \
248
    } while (0)
249
250
#define CHECK(call) do { \
251
        err = (call); \
252
        if (err < 0) \
253
            return err; \
254
    } while (0)
255
256
#define FUNC_NAME2(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
257
#define FUNC_NAME1(rw, codec, name) FUNC_NAME2(rw, codec, name)
258
#define FUNC_H264(name) FUNC_NAME1(READWRITE, h264, name)
259
#define FUNC_H265(name) FUNC_NAME1(READWRITE, h265, name)
260
#define FUNC_SEI(name)  FUNC_NAME1(READWRITE, sei,  name)
261
262
#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
263
264
#define u(width, name, range_min, range_max) \
265
        xu(width, name, current->name, range_min, range_max, 0, )
266
#define ub(width, name) \
267
        xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0, )
268
#define flag(name) ub(1, name)
269
#define ue(name, range_min, range_max) \
270
        xue(name, current->name, range_min, range_max, 0, )
271
#define i(width, name, range_min, range_max) \
272
        xi(width, name, current->name, range_min, range_max, 0, )
273
#define ib(width, name) \
274
        xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0, )
275
#define se(name, range_min, range_max) \
276
        xse(name, current->name, range_min, range_max, 0, )
277
278
#define us(width, name, range_min, range_max, subs, ...) \
279
        xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
280
#define ubs(width, name, subs, ...) \
281
        xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
282
#define flags(name, subs, ...) \
283
        xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
284
#define ues(name, range_min, range_max, subs, ...) \
285
        xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
286
#define is(width, name, range_min, range_max, subs, ...) \
287
        xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
288
#define ibs(width, name, subs, ...) \
289
        xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
290
#define ses(name, range_min, range_max, subs, ...) \
291
        xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
292
293
#define fixed(width, name, value) do { \
294
        av_unused uint32_t fixed_value = value; \
295
        xu(width, name, fixed_value, value, value, 0, ); \
296
    } while (0)
297
298
299
#define READ
300
#define READWRITE read
301
#define RWContext GetBitContext
302
303
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
304
        uint32_t value; \
305
        CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
306
                                   SUBSCRIPTS(subs, __VA_ARGS__), \
307
                                   &value, range_min, range_max)); \
308
        var = value; \
309
    } while (0)
310
#define xue(name, var, range_min, range_max, subs, ...) do { \
311
        uint32_t value; \
312
        CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
313
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
314
                                 &value, range_min, range_max)); \
315
        var = value; \
316
    } while (0)
317
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
318
        int32_t value; \
319
        CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
320
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
321
                                 &value, range_min, range_max)); \
322
        var = value; \
323
    } while (0)
324
#define xse(name, var, range_min, range_max, subs, ...) do { \
325
        int32_t value; \
326
        CHECK(cbs_read_se_golomb(ctx, rw, #name, \
327
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
328
                                 &value, range_min, range_max)); \
329
        var = value; \
330
    } while (0)
331
332
333
#define infer(name, value) do { \
334
        current->name = value; \
335
    } while (0)
336
337
13797
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
338
{
339
13797
    int bits_left = get_bits_left(gbc);
340
13797
    if (bits_left > 8)
341
10796
        return 1;
342
3001
    if (bits_left == 0)
343
        return 0;
344
3001
    if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
345
1
        return 1;
346
3000
    return 0;
347
}
348
349
#define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
350
351
#define bit_position(rw)   (get_bits_count(rw))
352
#define byte_alignment(rw) (get_bits_count(rw) % 8)
353
354
#define allocate(name, size) do { \
355
        name ## _ref = av_buffer_allocz(size + \
356
                                        AV_INPUT_BUFFER_PADDING_SIZE); \
357
        if (!name ## _ref) \
358
            return AVERROR(ENOMEM); \
359
        name = name ## _ref->data; \
360
    } while (0)
361
362
#define FUNC(name) FUNC_SEI(name)
363
#include "cbs_sei_syntax_template.c"
364
#undef FUNC
365
366
#define FUNC(name) FUNC_H264(name)
367
#include "cbs_h264_syntax_template.c"
368
#undef FUNC
369
370
#define FUNC(name) FUNC_H265(name)
371
#include "cbs_h265_syntax_template.c"
372
#undef FUNC
373
374
#undef READ
375
#undef READWRITE
376
#undef RWContext
377
#undef xu
378
#undef xi
379
#undef xue
380
#undef xse
381
#undef infer
382
#undef more_rbsp_data
383
#undef bit_position
384
#undef byte_alignment
385
#undef allocate
386
387
388
#define WRITE
389
#define READWRITE write
390
#define RWContext PutBitContext
391
392
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
393
        uint32_t value = var; \
394
        CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
395
                                    SUBSCRIPTS(subs, __VA_ARGS__), \
396
                                    value, range_min, range_max)); \
397
    } while (0)
398
#define xue(name, var, range_min, range_max, subs, ...) do { \
399
        uint32_t value = var; \
400
        CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
401
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
402
                                  value, range_min, range_max)); \
403
    } while (0)
404
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
405
        int32_t value = var; \
406
        CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
407
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
408
                                  value, range_min, range_max)); \
409
    } while (0)
410
#define xse(name, var, range_min, range_max, subs, ...) do { \
411
        int32_t value = var; \
412
        CHECK(cbs_write_se_golomb(ctx, rw, #name, \
413
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
414
                                  value, range_min, range_max)); \
415
    } while (0)
416
417
#define infer(name, value) do { \
418
        if (current->name != (value)) { \
419
            av_log(ctx->log_ctx, AV_LOG_ERROR, \
420
                   "%s does not match inferred value: " \
421
                   "%"PRId64", but should be %"PRId64".\n", \
422
                   #name, (int64_t)current->name, (int64_t)(value)); \
423
            return AVERROR_INVALIDDATA; \
424
        } \
425
    } while (0)
426
427
#define more_rbsp_data(var) (var)
428
429
#define bit_position(rw)   (put_bits_count(rw))
430
#define byte_alignment(rw) (put_bits_count(rw) % 8)
431
432
#define allocate(name, size) do { \
433
        if (!name) { \
434
            av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
435
                   "for writing.\n", #name); \
436
            return AVERROR_INVALIDDATA; \
437
        } \
438
    } while (0)
439
440
#define FUNC(name) FUNC_SEI(name)
441
#include "cbs_sei_syntax_template.c"
442
#undef FUNC
443
444
#define FUNC(name) FUNC_H264(name)
445
#include "cbs_h264_syntax_template.c"
446
#undef FUNC
447
448
#define FUNC(name) FUNC_H265(name)
449
#include "cbs_h265_syntax_template.c"
450
#undef FUNC
451
452
#undef WRITE
453
#undef READWRITE
454
#undef RWContext
455
#undef xu
456
#undef xi
457
#undef xue
458
#undef xse
459
#undef u
460
#undef i
461
#undef flag
462
#undef ue
463
#undef se
464
#undef infer
465
#undef more_rbsp_data
466
#undef bit_position
467
#undef byte_alignment
468
#undef allocate
469
470
471
4502
static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
472
                                       CodedBitstreamFragment *frag,
473
                                       const H2645Packet *packet)
474
{
475
    int err, i;
476
477
18950
    for (i = 0; i < packet->nb_nals; i++) {
478
14448
        const H2645NAL *nal = &packet->nals[i];
479
        AVBufferRef *ref;
480
14448
        size_t size = nal->size;
481
482
14448
        if (nal->nuh_layer_id > 0)
483
            continue;
484
485
        // Remove trailing zeroes.
486

22282
        while (size > 0 && nal->data[size - 1] == 0)
487
7834
            --size;
488
14448
        if (size == 0) {
489
            av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
490
            continue;
491
        }
492
493
28896
        ref = (nal->data == nal->raw_data) ? frag->data_ref
494
14448
                                           : packet->rbsp.rbsp_buffer_ref;
495
496
14448
        err = ff_cbs_insert_unit_data(frag, -1, nal->type,
497
14448
                            (uint8_t*)nal->data, size, ref);
498
14448
        if (err < 0)
499
            return err;
500
    }
501
502
4502
    return 0;
503
}
504
505
4502
static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
506
                                    CodedBitstreamFragment *frag,
507
                                    int header)
508
{
509
4502
    enum AVCodecID codec_id = ctx->codec->codec_id;
510
4502
    CodedBitstreamH2645Context *priv = ctx->priv_data;
511
    GetByteContext gbc;
512
    int err;
513
514

4502
    av_assert0(frag->data && frag->nb_units == 0);
515
4502
    if (frag->data_size == 0)
516
        return 0;
517
518

4502
    if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
519
        // AVCC header.
520
        size_t size, start, end;
521
        int i, count, version;
522
523
        priv->mp4 = 1;
524
525
        bytestream2_init(&gbc, frag->data, frag->data_size);
526
527
        if (bytestream2_get_bytes_left(&gbc) < 6)
528
            return AVERROR_INVALIDDATA;
529
530
        version = bytestream2_get_byte(&gbc);
531
        if (version != 1) {
532
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
533
                   "first byte %u.\n", version);
534
            return AVERROR_INVALIDDATA;
535
        }
536
537
        bytestream2_skip(&gbc, 3);
538
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
539
540
        // SPS array.
541
        count = bytestream2_get_byte(&gbc) & 0x1f;
542
        start = bytestream2_tell(&gbc);
543
        for (i = 0; i < count; i++) {
544
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
545
                return AVERROR_INVALIDDATA;
546
            size = bytestream2_get_be16(&gbc);
547
            if (bytestream2_get_bytes_left(&gbc) < size)
548
                return AVERROR_INVALIDDATA;
549
            bytestream2_skip(&gbc, size);
550
        }
551
        end = bytestream2_tell(&gbc);
552
553
        err = ff_h2645_packet_split(&priv->read_packet,
554
                                    frag->data + start, end - start,
555
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
556
        if (err < 0) {
557
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
558
            return err;
559
        }
560
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
561
        if (err < 0)
562
            return err;
563
564
        // PPS array.
565
        count = bytestream2_get_byte(&gbc);
566
        start = bytestream2_tell(&gbc);
567
        for (i = 0; i < count; i++) {
568
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
569
                return AVERROR_INVALIDDATA;
570
            size = bytestream2_get_be16(&gbc);
571
            if (bytestream2_get_bytes_left(&gbc) < size)
572
                return AVERROR_INVALIDDATA;
573
            bytestream2_skip(&gbc, size);
574
        }
575
        end = bytestream2_tell(&gbc);
576
577
        err = ff_h2645_packet_split(&priv->read_packet,
578
                                    frag->data + start, end - start,
579
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
580
        if (err < 0) {
581
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
582
            return err;
583
        }
584
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
585
        if (err < 0)
586
            return err;
587
588
        if (bytestream2_get_bytes_left(&gbc) > 0) {
589
            av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
590
                   "header.\n", bytestream2_get_bytes_left(&gbc));
591
        }
592
593

4502
    } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
594
        // HVCC header.
595
        size_t size, start, end;
596
        int i, j, nb_arrays, nal_unit_type, nb_nals, version;
597
598
        priv->mp4 = 1;
599
600
        bytestream2_init(&gbc, frag->data, frag->data_size);
601
602
        if (bytestream2_get_bytes_left(&gbc) < 23)
603
            return AVERROR_INVALIDDATA;
604
605
        version = bytestream2_get_byte(&gbc);
606
        if (version != 1) {
607
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
608
                   "first byte %u.\n", version);
609
            return AVERROR_INVALIDDATA;
610
        }
611
612
        bytestream2_skip(&gbc, 20);
613
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
614
615
        nb_arrays = bytestream2_get_byte(&gbc);
616
        for (i = 0; i < nb_arrays; i++) {
617
            nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
618
            nb_nals = bytestream2_get_be16(&gbc);
619
620
            start = bytestream2_tell(&gbc);
621
            for (j = 0; j < nb_nals; j++) {
622
                if (bytestream2_get_bytes_left(&gbc) < 2)
623
                    return AVERROR_INVALIDDATA;
624
                size = bytestream2_get_be16(&gbc);
625
                if (bytestream2_get_bytes_left(&gbc) < size)
626
                    return AVERROR_INVALIDDATA;
627
                bytestream2_skip(&gbc, size);
628
            }
629
            end = bytestream2_tell(&gbc);
630
631
            err = ff_h2645_packet_split(&priv->read_packet,
632
                                        frag->data + start, end - start,
633
                                        ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
634
            if (err < 0) {
635
                av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
636
                       "HVCC array %d (%d NAL units of type %d).\n",
637
                       i, nb_nals, nal_unit_type);
638
                return err;
639
            }
640
            err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
641
            if (err < 0)
642
                return err;
643
        }
644
645
    } else {
646
        // Annex B, or later MP4 with already-known parameters.
647
648
4502
        err = ff_h2645_packet_split(&priv->read_packet,
649
4502
                                    frag->data, frag->data_size,
650
                                    ctx->log_ctx,
651
                                    priv->mp4, priv->nal_length_size,
652
                                    codec_id, 1, 1);
653
4502
        if (err < 0)
654
            return err;
655
656
4502
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
657
4502
        if (err < 0)
658
            return err;
659
    }
660
661
4502
    return 0;
662
}
663
664
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
665
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
666
                                                  CodedBitstreamUnit *unit)  \
667
{ \
668
    CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
669
    H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
670
    unsigned int id = ps_var->id_element; \
671
    int err; \
672
    if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
673
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
674
               " id : %d.\n", id); \
675
        return AVERROR_INVALIDDATA; \
676
    } \
677
    err = ff_cbs_make_unit_refcounted(ctx, unit); \
678
    if (err < 0) \
679
        return err; \
680
    if (priv->ps_var[id] == priv->active_ ## ps_var) \
681
        priv->active_ ## ps_var = NULL ; \
682
    av_buffer_unref(&priv->ps_var ## _ref[id]); \
683
    av_assert0(unit->content_ref); \
684
    priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
685
    if (!priv->ps_var ## _ref[id]) \
686
        return AVERROR(ENOMEM); \
687
    priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
688
    return 0; \
689
}
690
691


80
cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
692


1655
cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
693


96
cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
694


100
cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
695


550
cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
696
697
6616
static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
698
                                  CodedBitstreamUnit *unit)
699
{
700
    GetBitContext gbc;
701
    int err;
702
703
6616
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
704
6616
    if (err < 0)
705
        return err;
706
707
6616
    err = ff_cbs_alloc_unit_content2(ctx, unit);
708
6616
    if (err < 0)
709
        return err;
710
711


6616
    switch (unit->type) {
712
40
    case H264_NAL_SPS:
713
        {
714
40
            H264RawSPS *sps = unit->content;
715
716
40
            err = cbs_h264_read_sps(ctx, &gbc, sps);
717
40
            if (err < 0)
718
                return err;
719
720
40
            err = cbs_h264_replace_sps(ctx, unit);
721
40
            if (err < 0)
722
                return err;
723
        }
724
40
        break;
725
726
    case H264_NAL_SPS_EXT:
727
        {
728
            err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
729
            if (err < 0)
730
                return err;
731
        }
732
        break;
733
734
1182
    case H264_NAL_PPS:
735
        {
736
1182
            H264RawPPS *pps = unit->content;
737
738
1182
            err = cbs_h264_read_pps(ctx, &gbc, pps);
739
1182
            if (err < 0)
740
                return err;
741
742
1182
            err = cbs_h264_replace_pps(ctx, unit);
743
1182
            if (err < 0)
744
                return err;
745
        }
746
1182
        break;
747
748
4913
    case H264_NAL_SLICE:
749
    case H264_NAL_IDR_SLICE:
750
    case H264_NAL_AUXILIARY_SLICE:
751
        {
752
4913
            H264RawSlice *slice = unit->content;
753
            int pos, len;
754
755
4913
            err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
756
4913
            if (err < 0)
757
                return err;
758
759
4913
            if (!cbs_h2645_read_more_rbsp_data(&gbc))
760
                return AVERROR_INVALIDDATA;
761
762
4913
            pos = get_bits_count(&gbc);
763
4913
            len = unit->data_size;
764
765
4913
            slice->data_size = len - pos / 8;
766
4913
            slice->data_ref  = av_buffer_ref(unit->data_ref);
767
4913
            if (!slice->data_ref)
768
                return AVERROR(ENOMEM);
769
4913
            slice->data = unit->data + pos / 8;
770
4913
            slice->data_bit_start = pos % 8;
771
        }
772
4913
        break;
773
774
195
    case H264_NAL_AUD:
775
        {
776
195
            err = cbs_h264_read_aud(ctx, &gbc, unit->content);
777
195
            if (err < 0)
778
                return err;
779
        }
780
195
        break;
781
782
283
    case H264_NAL_SEI:
783
        {
784
283
            err = cbs_h264_read_sei(ctx, &gbc, unit->content);
785
283
            if (err < 0)
786
                return err;
787
        }
788
283
        break;
789
790
    case H264_NAL_FILLER_DATA:
791
        {
792
            err = cbs_h264_read_filler(ctx, &gbc, unit->content);
793
            if (err < 0)
794
                return err;
795
        }
796
        break;
797
798
3
    case H264_NAL_END_SEQUENCE:
799
    case H264_NAL_END_STREAM:
800
        {
801
3
            err = (unit->type == H264_NAL_END_SEQUENCE ?
802
3
                   cbs_h264_read_end_of_sequence :
803
3
                   cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
804
3
            if (err < 0)
805
                return err;
806
        }
807
3
        break;
808
809
    default:
810
        return AVERROR(ENOSYS);
811
    }
812
813
6616
    return 0;
814
}
815
816
7832
static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
817
                                  CodedBitstreamUnit *unit)
818
{
819
    GetBitContext gbc;
820
    int err;
821
822
7832
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
823
7832
    if (err < 0)
824
        return err;
825
826
7832
    err = ff_cbs_alloc_unit_content2(ctx, unit);
827
7832
    if (err < 0)
828
        return err;
829
830

7832
    switch (unit->type) {
831
48
    case HEVC_NAL_VPS:
832
        {
833
48
            H265RawVPS *vps = unit->content;
834
835
48
            err = cbs_h265_read_vps(ctx, &gbc, vps);
836
48
            if (err < 0)
837
                return err;
838
839
48
            err = cbs_h265_replace_vps(ctx, unit);
840
48
            if (err < 0)
841
                return err;
842
        }
843
48
        break;
844
50
    case HEVC_NAL_SPS:
845
        {
846
50
            H265RawSPS *sps = unit->content;
847
848
50
            err = cbs_h265_read_sps(ctx, &gbc, sps);
849
50
            if (err < 0)
850
                return err;
851
852
50
            err = cbs_h265_replace_sps(ctx, unit);
853
50
            if (err < 0)
854
                return err;
855
        }
856
50
        break;
857
858
275
    case HEVC_NAL_PPS:
859
        {
860
275
            H265RawPPS *pps = unit->content;
861
862
275
            err = cbs_h265_read_pps(ctx, &gbc, pps);
863
275
            if (err < 0)
864
                return err;
865
866
275
            err = cbs_h265_replace_pps(ctx, unit);
867
275
            if (err < 0)
868
                return err;
869
        }
870
275
        break;
871
872
5864
    case HEVC_NAL_TRAIL_N:
873
    case HEVC_NAL_TRAIL_R:
874
    case HEVC_NAL_TSA_N:
875
    case HEVC_NAL_TSA_R:
876
    case HEVC_NAL_STSA_N:
877
    case HEVC_NAL_STSA_R:
878
    case HEVC_NAL_RADL_N:
879
    case HEVC_NAL_RADL_R:
880
    case HEVC_NAL_RASL_N:
881
    case HEVC_NAL_RASL_R:
882
    case HEVC_NAL_BLA_W_LP:
883
    case HEVC_NAL_BLA_W_RADL:
884
    case HEVC_NAL_BLA_N_LP:
885
    case HEVC_NAL_IDR_W_RADL:
886
    case HEVC_NAL_IDR_N_LP:
887
    case HEVC_NAL_CRA_NUT:
888
        {
889
5864
            H265RawSlice *slice = unit->content;
890
            int pos, len;
891
892
5864
            err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
893
5864
            if (err < 0)
894
                return err;
895
896
5864
            if (!cbs_h2645_read_more_rbsp_data(&gbc))
897
                return AVERROR_INVALIDDATA;
898
899
5864
            pos = get_bits_count(&gbc);
900
5864
            len = unit->data_size;
901
902
5864
            slice->data_size = len - pos / 8;
903
5864
            slice->data_ref  = av_buffer_ref(unit->data_ref);
904
5864
            if (!slice->data_ref)
905
                return AVERROR(ENOMEM);
906
5864
            slice->data = unit->data + pos / 8;
907
5864
            slice->data_bit_start = pos % 8;
908
        }
909
5864
        break;
910
911
60
    case HEVC_NAL_AUD:
912
        {
913
60
            err = cbs_h265_read_aud(ctx, &gbc, unit->content);
914
60
            if (err < 0)
915
                return err;
916
        }
917
60
        break;
918
919
1535
    case HEVC_NAL_SEI_PREFIX:
920
    case HEVC_NAL_SEI_SUFFIX:
921
        {
922
1535
            err = cbs_h265_read_sei(ctx, &gbc, unit->content,
923
1535
                                    unit->type == HEVC_NAL_SEI_PREFIX);
924
925
1535
            if (err < 0)
926
                return err;
927
        }
928
1535
        break;
929
930
    default:
931
        return AVERROR(ENOSYS);
932
    }
933
934
7832
    return 0;
935
}
936
937
8067
static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
938
                                      PutBitContext *pbc, const uint8_t *data,
939
                                      size_t data_size, int data_bit_start)
940
{
941
8067
    size_t rest  = data_size - (data_bit_start + 7) / 8;
942
8067
    const uint8_t *pos = data + data_bit_start / 8;
943
944

8067
    av_assert0(data_bit_start >= 0 &&
945
               data_size > data_bit_start / 8);
946
947
8067
    if (data_size * 8 + 8 > put_bits_left(pbc))
948
        return AVERROR(ENOSPC);
949
950
8067
    if (!rest)
951
        goto rbsp_stop_one_bit;
952
953
    // First copy the remaining bits of the first byte
954
    // The above check ensures that we do not accidentally
955
    // copy beyond the rbsp_stop_one_bit.
956
8067
    if (data_bit_start % 8)
957
955
        put_bits(pbc, 8 - data_bit_start % 8,
958
955
                 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
959
960
8067
    if (put_bits_count(pbc) % 8 == 0) {
961
        // If the writer is aligned at this point,
962
        // memcpy can be used to improve performance.
963
        // This happens normally for CABAC.
964
8067
        flush_put_bits(pbc);
965
8067
        memcpy(put_bits_ptr(pbc), pos, rest);
966
8067
        skip_put_bytes(pbc, rest);
967
    } else {
968
        // If not, we have to copy manually.
969
        // rbsp_stop_one_bit forces us to special-case
970
        // the last byte.
971
        uint8_t temp;
972
        int i;
973
974
        for (; rest > 4; rest -= 4, pos += 4)
975
            put_bits32(pbc, AV_RB32(pos));
976
977
        for (; rest > 1; rest--, pos++)
978
            put_bits(pbc, 8, *pos);
979
980
    rbsp_stop_one_bit:
981
        temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
982
983
        av_assert0(temp);
984
        i = ff_ctz(*pos);
985
        temp = temp >> i;
986
        i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
987
        put_bits(pbc, i, temp);
988
        if (put_bits_count(pbc) % 8)
989
            put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
990
    }
991
992
8067
    return 0;
993
}
994
995
2912
static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
996
                                   CodedBitstreamUnit *unit,
997
                                   PutBitContext *pbc)
998
{
999
    int err;
1000
1001


2912
    switch (unit->type) {
1002
40
    case H264_NAL_SPS:
1003
        {
1004
40
            H264RawSPS *sps = unit->content;
1005
1006
40
            err = cbs_h264_write_sps(ctx, pbc, sps);
1007
40
            if (err < 0)
1008
                return err;
1009
1010
40
            err = cbs_h264_replace_sps(ctx, unit);
1011
40
            if (err < 0)
1012
                return err;
1013
        }
1014
40
        break;
1015
1016
    case H264_NAL_SPS_EXT:
1017
        {
1018
            H264RawSPSExtension *sps_ext = unit->content;
1019
1020
            err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1021
            if (err < 0)
1022
                return err;
1023
        }
1024
        break;
1025
1026
473
    case H264_NAL_PPS:
1027
        {
1028
473
            H264RawPPS *pps = unit->content;
1029
1030
473
            err = cbs_h264_write_pps(ctx, pbc, pps);
1031
473
            if (err < 0)
1032
                return err;
1033
1034
473
            err = cbs_h264_replace_pps(ctx, unit);
1035
473
            if (err < 0)
1036
                return err;
1037
        }
1038
473
        break;
1039
1040
2203
    case H264_NAL_SLICE:
1041
    case H264_NAL_IDR_SLICE:
1042
    case H264_NAL_AUXILIARY_SLICE:
1043
        {
1044
2203
            H264RawSlice *slice = unit->content;
1045
1046
2203
            err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1047
2203
            if (err < 0)
1048
                return err;
1049
1050
2203
            if (slice->data) {
1051
2203
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1052
                                                 slice->data_size,
1053
                                                 slice->data_bit_start);
1054
2203
                if (err < 0)
1055
                    return err;
1056
            } else {
1057
                // No slice data - that was just the header.
1058
                // (Bitstream may be unaligned!)
1059
            }
1060
        }
1061
2203
        break;
1062
1063
191
    case H264_NAL_AUD:
1064
        {
1065
191
            err = cbs_h264_write_aud(ctx, pbc, unit->content);
1066
191
            if (err < 0)
1067
                return err;
1068
        }
1069
191
        break;
1070
1071
2
    case H264_NAL_SEI:
1072
        {
1073
2
            err = cbs_h264_write_sei(ctx, pbc, unit->content);
1074
2
            if (err < 0)
1075
                return err;
1076
        }
1077
2
        break;
1078
1079
    case H264_NAL_FILLER_DATA:
1080
        {
1081
            err = cbs_h264_write_filler(ctx, pbc, unit->content);
1082
            if (err < 0)
1083
                return err;
1084
        }
1085
        break;
1086
1087
1
    case H264_NAL_END_SEQUENCE:
1088
        {
1089
1
            err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1090
1
            if (err < 0)
1091
                return err;
1092
        }
1093
1
        break;
1094
1095
2
    case H264_NAL_END_STREAM:
1096
        {
1097
2
            err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1098
2
            if (err < 0)
1099
                return err;
1100
        }
1101
2
        break;
1102
1103
    default:
1104
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1105
               "NAL unit type %"PRIu32".\n", unit->type);
1106
        return AVERROR_PATCHWELCOME;
1107
    }
1108
1109
2912
    return 0;
1110
}
1111
1112
7832
static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1113
                                   CodedBitstreamUnit *unit,
1114
                                   PutBitContext *pbc)
1115
{
1116
    int err;
1117
1118

7832
    switch (unit->type) {
1119
48
    case HEVC_NAL_VPS:
1120
        {
1121
48
            H265RawVPS *vps = unit->content;
1122
1123
48
            err = cbs_h265_write_vps(ctx, pbc, vps);
1124
48
            if (err < 0)
1125
                return err;
1126
1127
48
            err = cbs_h265_replace_vps(ctx, unit);
1128
48
            if (err < 0)
1129
                return err;
1130
        }
1131
48
        break;
1132
1133
50
    case HEVC_NAL_SPS:
1134
        {
1135
50
            H265RawSPS *sps = unit->content;
1136
1137
50
            err = cbs_h265_write_sps(ctx, pbc, sps);
1138
50
            if (err < 0)
1139
                return err;
1140
1141
50
            err = cbs_h265_replace_sps(ctx, unit);
1142
50
            if (err < 0)
1143
                return err;
1144
        }
1145
50
        break;
1146
1147
275
    case HEVC_NAL_PPS:
1148
        {
1149
275
            H265RawPPS *pps = unit->content;
1150
1151
275
            err = cbs_h265_write_pps(ctx, pbc, pps);
1152
275
            if (err < 0)
1153
                return err;
1154
1155
275
            err = cbs_h265_replace_pps(ctx, unit);
1156
275
            if (err < 0)
1157
                return err;
1158
        }
1159
275
        break;
1160
1161
5864
    case HEVC_NAL_TRAIL_N:
1162
    case HEVC_NAL_TRAIL_R:
1163
    case HEVC_NAL_TSA_N:
1164
    case HEVC_NAL_TSA_R:
1165
    case HEVC_NAL_STSA_N:
1166
    case HEVC_NAL_STSA_R:
1167
    case HEVC_NAL_RADL_N:
1168
    case HEVC_NAL_RADL_R:
1169
    case HEVC_NAL_RASL_N:
1170
    case HEVC_NAL_RASL_R:
1171
    case HEVC_NAL_BLA_W_LP:
1172
    case HEVC_NAL_BLA_W_RADL:
1173
    case HEVC_NAL_BLA_N_LP:
1174
    case HEVC_NAL_IDR_W_RADL:
1175
    case HEVC_NAL_IDR_N_LP:
1176
    case HEVC_NAL_CRA_NUT:
1177
        {
1178
5864
            H265RawSlice *slice = unit->content;
1179
1180
5864
            err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1181
5864
            if (err < 0)
1182
                return err;
1183
1184
5864
            if (slice->data) {
1185
5864
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1186
                                                 slice->data_size,
1187
                                                 slice->data_bit_start);
1188
5864
                if (err < 0)
1189
                    return err;
1190
            } else {
1191
                // No slice data - that was just the header.
1192
            }
1193
        }
1194
5864
        break;
1195
1196
60
    case HEVC_NAL_AUD:
1197
        {
1198
60
            err = cbs_h265_write_aud(ctx, pbc, unit->content);
1199
60
            if (err < 0)
1200
                return err;
1201
        }
1202
60
        break;
1203
1204
1535
    case HEVC_NAL_SEI_PREFIX:
1205
    case HEVC_NAL_SEI_SUFFIX:
1206
        {
1207
1535
            err = cbs_h265_write_sei(ctx, pbc, unit->content,
1208
1535
                                     unit->type == HEVC_NAL_SEI_PREFIX);
1209
1210
1535
            if (err < 0)
1211
                return err;
1212
        }
1213
1535
        break;
1214
1215
    default:
1216
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1217
               "NAL unit type %"PRIu32".\n", unit->type);
1218
        return AVERROR_PATCHWELCOME;
1219
    }
1220
1221
7832
    return 0;
1222
}
1223
1224
10744
static int cbs_h2645_unit_requires_zero_byte(enum AVCodecID codec_id,
1225
                                             CodedBitstreamUnitType type,
1226
                                             int nal_unit_index)
1227
{
1228
    // Section B.1.2 in H.264, section B.2.2 in H.265.
1229
10744
    if (nal_unit_index == 0) {
1230
        // Assume that this is the first NAL unit in an access unit.
1231
3147
        return 1;
1232
    }
1233
7597
    if (codec_id == AV_CODEC_ID_H264)
1234

1917
        return type == H264_NAL_SPS || type == H264_NAL_PPS;
1235
5680
    if (codec_id == AV_CODEC_ID_HEVC)
1236

5680
        return type == HEVC_NAL_VPS || type == HEVC_NAL_SPS || type == HEVC_NAL_PPS;
1237
    return 0;
1238
}
1239
1240
3147
static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1241
                                       CodedBitstreamFragment *frag)
1242
{
1243
    uint8_t *data;
1244
    size_t max_size, dp, sp;
1245
    int err, i, zero_run;
1246
1247
13891
    for (i = 0; i < frag->nb_units; i++) {
1248
        // Data should already all have been written when we get here.
1249
10744
        av_assert0(frag->units[i].data);
1250
    }
1251
1252
3147
    max_size = 0;
1253
13891
    for (i = 0; i < frag->nb_units; i++) {
1254
        // Start code + content with worst-case emulation prevention.
1255
10744
        max_size += 4 + frag->units[i].data_size * 3 / 2;
1256
    }
1257
1258
3147
    data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1259
3147
    if (!data)
1260
        return AVERROR(ENOMEM);
1261
1262
3147
    dp = 0;
1263
13891
    for (i = 0; i < frag->nb_units; i++) {
1264
10744
        CodedBitstreamUnit *unit = &frag->units[i];
1265
1266
10744
        if (unit->data_bit_padding > 0) {
1267
            if (i < frag->nb_units - 1)
1268
                av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1269
                       "unaligned padding on non-final NAL unit.\n");
1270
            else
1271
                frag->data_bit_padding = unit->data_bit_padding;
1272
        }
1273
1274
10744
        if (cbs_h2645_unit_requires_zero_byte(ctx->codec->codec_id, unit->type, i)) {
1275
            // zero_byte
1276
3394
            data[dp++] = 0;
1277
        }
1278
        // start_code_prefix_one_3bytes
1279
10744
        data[dp++] = 0;
1280
10744
        data[dp++] = 0;
1281
10744
        data[dp++] = 1;
1282
1283
10744
        zero_run = 0;
1284
7513420
        for (sp = 0; sp < unit->data_size; sp++) {
1285
7502676
            if (zero_run < 2) {
1286
7501767
                if (unit->data[sp] == 0)
1287
43150
                    ++zero_run;
1288
                else
1289
7458617
                    zero_run = 0;
1290
            } else {
1291
909
                if ((unit->data[sp] & ~3) == 0) {
1292
                    // emulation_prevention_three_byte
1293
446
                    data[dp++] = 3;
1294
                }
1295
909
                zero_run = unit->data[sp] == 0;
1296
            }
1297
7502676
            data[dp++] = unit->data[sp];
1298
        }
1299
    }
1300
1301
3147
    av_assert0(dp <= max_size);
1302
3147
    err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1303
3147
    if (err)
1304
        return err;
1305
3147
    memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1306
1307
3147
    frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1308
                                      NULL, NULL, 0);
1309
3147
    if (!frag->data_ref) {
1310
        av_freep(&data);
1311
        return AVERROR(ENOMEM);
1312
    }
1313
1314
3147
    frag->data = data;
1315
3147
    frag->data_size = dp;
1316
1317
3147
    return 0;
1318
}
1319
1320
static void cbs_h264_flush(CodedBitstreamContext *ctx)
1321
{
1322
    CodedBitstreamH264Context *h264 = ctx->priv_data;
1323
1324
    for (int i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) {
1325
        av_buffer_unref(&h264->sps_ref[i]);
1326
        h264->sps[i] = NULL;
1327
    }
1328
    for (int i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) {
1329
        av_buffer_unref(&h264->pps_ref[i]);
1330
        h264->pps[i] = NULL;
1331
    }
1332
1333
    h264->active_sps = NULL;
1334
    h264->active_pps = NULL;
1335
    h264->last_slice_nal_unit_type = 0;
1336
}
1337
1338
30
static void cbs_h264_close(CodedBitstreamContext *ctx)
1339
{
1340
30
    CodedBitstreamH264Context *h264 = ctx->priv_data;
1341
    int i;
1342
1343
30
    ff_h2645_packet_uninit(&h264->common.read_packet);
1344
1345
990
    for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1346
960
        av_buffer_unref(&h264->sps_ref[i]);
1347
7710
    for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1348
7680
        av_buffer_unref(&h264->pps_ref[i]);
1349
30
}
1350
1351
static void cbs_h265_flush(CodedBitstreamContext *ctx)
1352
{
1353
    CodedBitstreamH265Context *h265 = ctx->priv_data;
1354
1355
    for (int i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) {
1356
        av_buffer_unref(&h265->vps_ref[i]);
1357
        h265->vps[i] = NULL;
1358
    }
1359
    for (int i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) {
1360
        av_buffer_unref(&h265->sps_ref[i]);
1361
        h265->sps[i] = NULL;
1362
    }
1363
    for (int i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) {
1364
        av_buffer_unref(&h265->pps_ref[i]);
1365
        h265->pps[i] = NULL;
1366
    }
1367
1368
    h265->active_vps = NULL;
1369
    h265->active_sps = NULL;
1370
    h265->active_pps = NULL;
1371
}
1372
1373
40
static void cbs_h265_close(CodedBitstreamContext *ctx)
1374
{
1375
40
    CodedBitstreamH265Context *h265 = ctx->priv_data;
1376
    int i;
1377
1378
40
    ff_h2645_packet_uninit(&h265->common.read_packet);
1379
1380
680
    for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1381
640
        av_buffer_unref(&h265->vps_ref[i]);
1382
680
    for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1383
640
        av_buffer_unref(&h265->sps_ref[i]);
1384
2600
    for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1385
2560
        av_buffer_unref(&h265->pps_ref[i]);
1386
40
}
1387
1388
283
static void cbs_h264_free_sei(void *opaque, uint8_t *content)
1389
{
1390
283
    H264RawSEI *sei = (H264RawSEI*)content;
1391
283
    ff_cbs_sei_free_message_list(&sei->message_list);
1392
283
    av_free(content);
1393
283
}
1394
1395
static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = {
1396
    CBS_UNIT_TYPE_POD(H264_NAL_SPS,     H264RawSPS),
1397
    CBS_UNIT_TYPE_POD(H264_NAL_SPS_EXT, H264RawSPSExtension),
1398
1399
    CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id),
1400
1401
    {
1402
        .nb_unit_types  = 3,
1403
        .unit_types     = {
1404
            H264_NAL_IDR_SLICE,
1405
            H264_NAL_SLICE,
1406
            H264_NAL_AUXILIARY_SLICE,
1407
        },
1408
        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
1409
        .content_size   = sizeof(H264RawSlice),
1410
        .nb_ref_offsets = 1,
1411
        .ref_offsets    = { offsetof(H264RawSlice, data) },
1412
    },
1413
1414
    CBS_UNIT_TYPE_POD(H264_NAL_AUD,          H264RawAUD),
1415
    CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA,  H264RawFiller),
1416
    CBS_UNIT_TYPE_POD(H264_NAL_END_SEQUENCE, H264RawNALUnitHeader),
1417
    CBS_UNIT_TYPE_POD(H264_NAL_END_STREAM,   H264RawNALUnitHeader),
1418
1419
    CBS_UNIT_TYPE_COMPLEX(H264_NAL_SEI, H264RawSEI, &cbs_h264_free_sei),
1420
1421
    CBS_UNIT_TYPE_END_OF_LIST
1422
};
1423
1424
1535
static void cbs_h265_free_sei(void *opaque, uint8_t *content)
1425
{
1426
1535
    H265RawSEI *sei = (H265RawSEI*)content;
1427
1535
    ff_cbs_sei_free_message_list(&sei->message_list);
1428
1535
    av_free(content);
1429
1535
}
1430
1431
static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
1432
    CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_VPS, H265RawVPS, extension_data.data),
1433
    CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_SPS, H265RawSPS, extension_data.data),
1434
    CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_PPS, H265RawPPS, extension_data.data),
1435
1436
    CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD),
1437
1438
    {
1439
        // Slices of non-IRAP pictures.
1440
        .nb_unit_types         = CBS_UNIT_TYPE_RANGE,
1441
        .unit_type_range_start = HEVC_NAL_TRAIL_N,
1442
        .unit_type_range_end   = HEVC_NAL_RASL_R,
1443
1444
        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
1445
        .content_size   = sizeof(H265RawSlice),
1446
        .nb_ref_offsets = 1,
1447
        .ref_offsets    = { offsetof(H265RawSlice, data) },
1448
    },
1449
1450
    {
1451
        // Slices of IRAP pictures.
1452
        .nb_unit_types         = CBS_UNIT_TYPE_RANGE,
1453
        .unit_type_range_start = HEVC_NAL_BLA_W_LP,
1454
        .unit_type_range_end   = HEVC_NAL_CRA_NUT,
1455
1456
        .content_type   = CBS_CONTENT_TYPE_INTERNAL_REFS,
1457
        .content_size   = sizeof(H265RawSlice),
1458
        .nb_ref_offsets = 1,
1459
        .ref_offsets    = { offsetof(H265RawSlice, data) },
1460
    },
1461
1462
    {
1463
        .nb_unit_types  = 2,
1464
        .unit_types     = {
1465
            HEVC_NAL_SEI_PREFIX,
1466
            HEVC_NAL_SEI_SUFFIX
1467
        },
1468
        .content_type   = CBS_CONTENT_TYPE_COMPLEX,
1469
        .content_size   = sizeof(H265RawSEI),
1470
        .content_free   = &cbs_h265_free_sei,
1471
    },
1472
1473
    CBS_UNIT_TYPE_END_OF_LIST
1474
};
1475
1476
const CodedBitstreamType ff_cbs_type_h264 = {
1477
    .codec_id          = AV_CODEC_ID_H264,
1478
1479
    .priv_data_size    = sizeof(CodedBitstreamH264Context),
1480
1481
    .unit_types        = cbs_h264_unit_types,
1482
1483
    .split_fragment    = &cbs_h2645_split_fragment,
1484
    .read_unit         = &cbs_h264_read_nal_unit,
1485
    .write_unit        = &cbs_h264_write_nal_unit,
1486
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1487
1488
    .flush             = &cbs_h264_flush,
1489
    .close             = &cbs_h264_close,
1490
};
1491
1492
const CodedBitstreamType ff_cbs_type_h265 = {
1493
    .codec_id          = AV_CODEC_ID_HEVC,
1494
1495
    .priv_data_size    = sizeof(CodedBitstreamH265Context),
1496
1497
    .unit_types        = cbs_h265_unit_types,
1498
1499
    .split_fragment    = &cbs_h2645_split_fragment,
1500
    .read_unit         = &cbs_h265_read_nal_unit,
1501
    .write_unit        = &cbs_h265_write_nal_unit,
1502
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1503
1504
    .flush             = &cbs_h265_flush,
1505
    .close             = &cbs_h265_close,
1506
};
1507
1508
static const SEIMessageTypeDescriptor cbs_sei_common_types[] = {
1509
    {
1510
        SEI_TYPE_FILLER_PAYLOAD,
1511
        1, 1,
1512
        sizeof(SEIRawFillerPayload),
1513
        SEI_MESSAGE_RW(sei, filler_payload),
1514
    },
1515
    {
1516
        SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35,
1517
        1, 1,
1518
        sizeof(SEIRawUserDataRegistered),
1519
        SEI_MESSAGE_RW(sei, user_data_registered),
1520
    },
1521
    {
1522
        SEI_TYPE_USER_DATA_UNREGISTERED,
1523
        1, 1,
1524
        sizeof(SEIRawUserDataUnregistered),
1525
        SEI_MESSAGE_RW(sei, user_data_unregistered),
1526
    },
1527
    {
1528
        SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME,
1529
        1, 0,
1530
        sizeof(SEIRawMasteringDisplayColourVolume),
1531
        SEI_MESSAGE_RW(sei, mastering_display_colour_volume),
1532
    },
1533
    {
1534
        SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO,
1535
        1, 0,
1536
        sizeof(SEIRawContentLightLevelInfo),
1537
        SEI_MESSAGE_RW(sei, content_light_level_info),
1538
    },
1539
    {
1540
        SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS,
1541
        1, 0,
1542
        sizeof(SEIRawAlternativeTransferCharacteristics),
1543
        SEI_MESSAGE_RW(sei, alternative_transfer_characteristics),
1544
    },
1545
    SEI_MESSAGE_TYPE_END,
1546
};
1547
1548
static const SEIMessageTypeDescriptor cbs_sei_h264_types[] = {
1549
    {
1550
        SEI_TYPE_BUFFERING_PERIOD,
1551
        1, 0,
1552
        sizeof(H264RawSEIBufferingPeriod),
1553
        SEI_MESSAGE_RW(h264, sei_buffering_period),
1554
    },
1555
    {
1556
        SEI_TYPE_PIC_TIMING,
1557
        1, 0,
1558
        sizeof(H264RawSEIPicTiming),
1559
        SEI_MESSAGE_RW(h264, sei_pic_timing),
1560
    },
1561
    {
1562
        SEI_TYPE_PAN_SCAN_RECT,
1563
        1, 0,
1564
        sizeof(H264RawSEIPanScanRect),
1565
        SEI_MESSAGE_RW(h264, sei_pan_scan_rect),
1566
    },
1567
    {
1568
        SEI_TYPE_RECOVERY_POINT,
1569
        1, 0,
1570
        sizeof(H264RawSEIRecoveryPoint),
1571
        SEI_MESSAGE_RW(h264, sei_recovery_point),
1572
    },
1573
    {
1574
        SEI_TYPE_DISPLAY_ORIENTATION,
1575
        1, 0,
1576
        sizeof(H264RawSEIDisplayOrientation),
1577
        SEI_MESSAGE_RW(h264, sei_display_orientation),
1578
    },
1579
    SEI_MESSAGE_TYPE_END
1580
};
1581
1582
static const SEIMessageTypeDescriptor cbs_sei_h265_types[] = {
1583
    {
1584
        SEI_TYPE_BUFFERING_PERIOD,
1585
        1, 0,
1586
        sizeof(H265RawSEIBufferingPeriod),
1587
        SEI_MESSAGE_RW(h265, sei_buffering_period),
1588
    },
1589
    {
1590
        SEI_TYPE_PIC_TIMING,
1591
        1, 0,
1592
        sizeof(H265RawSEIPicTiming),
1593
        SEI_MESSAGE_RW(h265, sei_pic_timing),
1594
    },
1595
    {
1596
        SEI_TYPE_PAN_SCAN_RECT,
1597
        1, 0,
1598
        sizeof(H265RawSEIPanScanRect),
1599
        SEI_MESSAGE_RW(h265, sei_pan_scan_rect),
1600
    },
1601
    {
1602
        SEI_TYPE_RECOVERY_POINT,
1603
        1, 0,
1604
        sizeof(H265RawSEIRecoveryPoint),
1605
        SEI_MESSAGE_RW(h265, sei_recovery_point),
1606
    },
1607
    {
1608
        SEI_TYPE_DISPLAY_ORIENTATION,
1609
        1, 0,
1610
        sizeof(H265RawSEIDisplayOrientation),
1611
        SEI_MESSAGE_RW(h265, sei_display_orientation),
1612
    },
1613
    {
1614
        SEI_TYPE_ACTIVE_PARAMETER_SETS,
1615
        1, 0,
1616
        sizeof(H265RawSEIActiveParameterSets),
1617
        SEI_MESSAGE_RW(h265, sei_active_parameter_sets),
1618
    },
1619
    {
1620
        SEI_TYPE_DECODED_PICTURE_HASH,
1621
        0, 1,
1622
        sizeof(H265RawSEIDecodedPictureHash),
1623
        SEI_MESSAGE_RW(h265, sei_decoded_picture_hash),
1624
    },
1625
    {
1626
        SEI_TYPE_TIME_CODE,
1627
        1, 0,
1628
        sizeof(H265RawSEITimeCode),
1629
        SEI_MESSAGE_RW(h265, sei_time_code),
1630
    },
1631
    {
1632
        SEI_TYPE_ALPHA_CHANNEL_INFO,
1633
        1, 0,
1634
        sizeof(H265RawSEIAlphaChannelInfo),
1635
        SEI_MESSAGE_RW(h265, sei_alpha_channel_info),
1636
    },
1637
    SEI_MESSAGE_TYPE_END
1638
};
1639
1640
4926
const SEIMessageTypeDescriptor *ff_cbs_sei_find_type(CodedBitstreamContext *ctx,
1641
                                                     int payload_type)
1642
{
1643
    const SEIMessageTypeDescriptor *codec_list;
1644
    int i;
1645
1646
34438
    for (i = 0; cbs_sei_common_types[i].type >= 0; i++) {
1647
29522
        if (cbs_sei_common_types[i].type == payload_type)
1648
10
            return &cbs_sei_common_types[i];
1649
    }
1650
1651
4916
    switch (ctx->codec->codec_id) {
1652
311
    case AV_CODEC_ID_H264:
1653
311
        codec_list = cbs_sei_h264_types;
1654
311
        break;
1655
4605
    case AV_CODEC_ID_H265:
1656
4605
        codec_list = cbs_sei_h265_types;
1657
4605
        break;
1658
    default:
1659
        return NULL;
1660
    }
1661
1662
30413
    for (i = 0; codec_list[i].type >= 0; i++) {
1663
30406
        if (codec_list[i].type == payload_type)
1664
4909
            return &codec_list[i];
1665
    }
1666
1667
7
    return NULL;
1668
}