GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/cbs_h2645.c Lines: 447 735 60.8 %
Date: 2020-04-02 05:41:20 Branches: 251 501 50.1 %

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
69106
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

69106
    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
69106
    av_assert0(value != UINT32_MAX);
156
157
69106
    len = av_log2(value + 1);
158
69106
    if (put_bits_left(pbc) < 2 * len + 1)
159
        return AVERROR(ENOSPC);
160
161
69106
    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
69106
    put_bits(pbc, len, 0);
177
69106
    if (len + 1 < 32)
178
69106
        put_bits(pbc, len + 1, value + 1);
179
    else
180
        put_bits32(pbc, value + 1);
181
182
69106
    return 0;
183
}
184
185
75672
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

75672
    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
75672
    av_assert0(value != INT32_MIN);
200
201
75672
    if (value == 0)
202
17146
        uvalue = 0;
203
58526
    else if (value > 0)
204
31918
        uvalue = 2 * (uint32_t)value - 1;
205
    else
206
26608
        uvalue = 2 * (uint32_t)-value;
207
208
75672
    len = av_log2(uvalue + 1);
209
75672
    if (put_bits_left(pbc) < 2 * len + 1)
210
        return AVERROR(ENOSPC);
211
212
75672
    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
75672
    put_bits(pbc, len, 0);
228
75672
    if (len + 1 < 32)
229
75672
        put_bits(pbc, len + 1, uvalue + 1);
230
    else
231
        put_bits32(pbc, uvalue + 1);
232
233
75672
    return 0;
234
}
235
236
#define HEADER(name) do { \
237
        ff_cbs_trace_header(ctx, name); \
238
    } while (0)
239
240
#define CHECK(call) do { \
241
        err = (call); \
242
        if (err < 0) \
243
            return err; \
244
    } while (0)
245
246
#define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
247
#define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
248
#define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name)
249
250
#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
251
252
#define u(width, name, range_min, range_max) \
253
        xu(width, name, current->name, range_min, range_max, 0)
254
#define ub(width, name) \
255
        xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0)
256
#define flag(name) ub(1, name)
257
#define ue(name, range_min, range_max) \
258
        xue(name, current->name, range_min, range_max, 0)
259
#define i(width, name, range_min, range_max) \
260
        xi(width, name, current->name, range_min, range_max, 0)
261
#define ib(width, name) \
262
        xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0)
263
#define se(name, range_min, range_max) \
264
        xse(name, current->name, range_min, range_max, 0)
265
266
#define us(width, name, range_min, range_max, subs, ...) \
267
        xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
268
#define ubs(width, name, subs, ...) \
269
        xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
270
#define flags(name, subs, ...) \
271
        xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
272
#define ues(name, range_min, range_max, subs, ...) \
273
        xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
274
#define is(width, name, range_min, range_max, subs, ...) \
275
        xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
276
#define ibs(width, name, subs, ...) \
277
        xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
278
#define ses(name, range_min, range_max, subs, ...) \
279
        xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
280
281
#define fixed(width, name, value) do { \
282
        av_unused uint32_t fixed_value = value; \
283
        xu(width, name, fixed_value, value, value, 0); \
284
    } while (0)
285
286
287
#define READ
288
#define READWRITE read
289
#define RWContext GetBitContext
290
291
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
292
        uint32_t value; \
293
        CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
294
                                   SUBSCRIPTS(subs, __VA_ARGS__), \
295
                                   &value, range_min, range_max)); \
296
        var = value; \
297
    } while (0)
298
#define xue(name, var, range_min, range_max, subs, ...) do { \
299
        uint32_t value; \
300
        CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
301
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
302
                                 &value, range_min, range_max)); \
303
        var = value; \
304
    } while (0)
305
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
306
        int32_t value; \
307
        CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
308
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
309
                                 &value, range_min, range_max)); \
310
        var = value; \
311
    } while (0)
312
#define xse(name, var, range_min, range_max, subs, ...) do { \
313
        int32_t value; \
314
        CHECK(cbs_read_se_golomb(ctx, rw, #name, \
315
                                 SUBSCRIPTS(subs, __VA_ARGS__), \
316
                                 &value, range_min, range_max)); \
317
        var = value; \
318
    } while (0)
319
320
321
#define infer(name, value) do { \
322
        current->name = value; \
323
    } while (0)
324
325
13797
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
326
{
327
13797
    int bits_left = get_bits_left(gbc);
328
13797
    if (bits_left > 8)
329
10796
        return 1;
330
3001
    if (bits_left == 0)
331
        return 0;
332
3001
    if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
333
1
        return 1;
334
3000
    return 0;
335
}
336
337
#define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
338
339
#define byte_alignment(rw) (get_bits_count(rw) % 8)
340
341
#define allocate(name, size) do { \
342
        name ## _ref = av_buffer_allocz(size + \
343
                                        AV_INPUT_BUFFER_PADDING_SIZE); \
344
        if (!name ## _ref) \
345
            return AVERROR(ENOMEM); \
346
        name = name ## _ref->data; \
347
    } while (0)
348
349
#define FUNC(name) FUNC_H264(READWRITE, name)
350
#include "cbs_h264_syntax_template.c"
351
#undef FUNC
352
353
#define FUNC(name) FUNC_H265(READWRITE, name)
354
#include "cbs_h265_syntax_template.c"
355
#undef FUNC
356
357
#undef READ
358
#undef READWRITE
359
#undef RWContext
360
#undef xu
361
#undef xi
362
#undef xue
363
#undef xse
364
#undef infer
365
#undef more_rbsp_data
366
#undef byte_alignment
367
#undef allocate
368
369
370
#define WRITE
371
#define READWRITE write
372
#define RWContext PutBitContext
373
374
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
375
        uint32_t value = var; \
376
        CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
377
                                    SUBSCRIPTS(subs, __VA_ARGS__), \
378
                                    value, range_min, range_max)); \
379
    } while (0)
380
#define xue(name, var, range_min, range_max, subs, ...) do { \
381
        uint32_t value = var; \
382
        CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
383
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
384
                                  value, range_min, range_max)); \
385
    } while (0)
386
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
387
        int32_t value = var; \
388
        CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
389
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
390
                                  value, range_min, range_max)); \
391
    } while (0)
392
#define xse(name, var, range_min, range_max, subs, ...) do { \
393
        int32_t value = var; \
394
        CHECK(cbs_write_se_golomb(ctx, rw, #name, \
395
                                  SUBSCRIPTS(subs, __VA_ARGS__), \
396
                                  value, range_min, range_max)); \
397
    } while (0)
398
399
#define infer(name, value) do { \
400
        if (current->name != (value)) { \
401
            av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
402
                   "%s does not match inferred value: " \
403
                   "%"PRId64", but should be %"PRId64".\n", \
404
                   #name, (int64_t)current->name, (int64_t)(value)); \
405
        } \
406
    } while (0)
407
408
#define more_rbsp_data(var) (var)
409
410
#define byte_alignment(rw) (put_bits_count(rw) % 8)
411
412
#define allocate(name, size) do { \
413
        if (!name) { \
414
            av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
415
                   "for writing.\n", #name); \
416
            return AVERROR_INVALIDDATA; \
417
        } \
418
    } while (0)
419
420
#define FUNC(name) FUNC_H264(READWRITE, name)
421
#include "cbs_h264_syntax_template.c"
422
#undef FUNC
423
424
#define FUNC(name) FUNC_H265(READWRITE, name)
425
#include "cbs_h265_syntax_template.c"
426
#undef FUNC
427
428
#undef WRITE
429
#undef READWRITE
430
#undef RWContext
431
#undef xu
432
#undef xi
433
#undef xue
434
#undef xse
435
#undef u
436
#undef i
437
#undef flag
438
#undef ue
439
#undef se
440
#undef infer
441
#undef more_rbsp_data
442
#undef byte_alignment
443
#undef allocate
444
445
446
1182
static void cbs_h264_free_pps(void *opaque, uint8_t *content)
447
{
448
1182
    H264RawPPS *pps = (H264RawPPS*)content;
449
1182
    av_buffer_unref(&pps->slice_group_id_ref);
450
1182
    av_freep(&content);
451
1182
}
452
453
303
static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
454
{
455

303
    switch (payload->payload_type) {
456
293
    case H264_SEI_TYPE_BUFFERING_PERIOD:
457
    case H264_SEI_TYPE_PIC_TIMING:
458
    case H264_SEI_TYPE_PAN_SCAN_RECT:
459
    case H264_SEI_TYPE_RECOVERY_POINT:
460
    case H264_SEI_TYPE_DISPLAY_ORIENTATION:
461
    case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
462
    case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
463
293
        break;
464
5
    case H264_SEI_TYPE_USER_DATA_REGISTERED:
465
5
        av_buffer_unref(&payload->payload.user_data_registered.data_ref);
466
5
        break;
467
    case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
468
        av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
469
        break;
470
5
    default:
471
5
        av_buffer_unref(&payload->payload.other.data_ref);
472
5
        break;
473
    }
474
303
}
475
476
283
static void cbs_h264_free_sei(void *opaque, uint8_t *content)
477
{
478
283
    H264RawSEI *sei = (H264RawSEI*)content;
479
    int i;
480
586
    for (i = 0; i < sei->payload_count; i++)
481
303
        cbs_h264_free_sei_payload(&sei->payload[i]);
482
283
    av_freep(&content);
483
283
}
484
485
4913
static void cbs_h264_free_slice(void *opaque, uint8_t *content)
486
{
487
4913
    H264RawSlice *slice = (H264RawSlice*)content;
488
4913
    av_buffer_unref(&slice->data_ref);
489
4913
    av_freep(&content);
490
4913
}
491
492
48
static void cbs_h265_free_vps(void *opaque, uint8_t *content)
493
{
494
48
    H265RawVPS *vps = (H265RawVPS*)content;
495
48
    av_buffer_unref(&vps->extension_data.data_ref);
496
48
    av_freep(&content);
497
48
}
498
499
50
static void cbs_h265_free_sps(void *opaque, uint8_t *content)
500
{
501
50
    H265RawSPS *sps = (H265RawSPS*)content;
502
50
    av_buffer_unref(&sps->extension_data.data_ref);
503
50
    av_freep(&content);
504
50
}
505
506
275
static void cbs_h265_free_pps(void *opaque, uint8_t *content)
507
{
508
275
    H265RawPPS *pps = (H265RawPPS*)content;
509
275
    av_buffer_unref(&pps->extension_data.data_ref);
510
275
    av_freep(&content);
511
275
}
512
513
5864
static void cbs_h265_free_slice(void *opaque, uint8_t *content)
514
{
515
5864
    H265RawSlice *slice = (H265RawSlice*)content;
516
5864
    av_buffer_unref(&slice->data_ref);
517
5864
    av_freep(&content);
518
5864
}
519
520
1535
static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
521
{
522

1535
    switch (payload->payload_type) {
523
1535
    case HEVC_SEI_TYPE_BUFFERING_PERIOD:
524
    case HEVC_SEI_TYPE_PICTURE_TIMING:
525
    case HEVC_SEI_TYPE_PAN_SCAN_RECT:
526
    case HEVC_SEI_TYPE_RECOVERY_POINT:
527
    case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
528
    case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
529
    case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
530
    case HEVC_SEI_TYPE_TIME_CODE:
531
    case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
532
    case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
533
    case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
534
    case HEVC_SEI_TYPE_ALPHA_CHANNEL_INFO:
535
1535
        break;
536
    case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
537
        av_buffer_unref(&payload->payload.user_data_registered.data_ref);
538
        break;
539
    case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
540
        av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
541
        break;
542
    default:
543
        av_buffer_unref(&payload->payload.other.data_ref);
544
        break;
545
    }
546
1535
}
547
548
1535
static void cbs_h265_free_sei(void *opaque, uint8_t *content)
549
{
550
1535
    H265RawSEI *sei = (H265RawSEI*)content;
551
    int i;
552
3070
    for (i = 0; i < sei->payload_count; i++)
553
1535
        cbs_h265_free_sei_payload(&sei->payload[i]);
554
1535
    av_freep(&content);
555
1535
}
556
557
4502
static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
558
                                       CodedBitstreamFragment *frag,
559
                                       const H2645Packet *packet)
560
{
561
    int err, i;
562
563
18950
    for (i = 0; i < packet->nb_nals; i++) {
564
14448
        const H2645NAL *nal = &packet->nals[i];
565
        AVBufferRef *ref;
566
14448
        size_t size = nal->size;
567
568
14448
        if (nal->nuh_layer_id > 0)
569
            continue;
570
571
        // Remove trailing zeroes.
572

22282
        while (size > 0 && nal->data[size - 1] == 0)
573
7834
            --size;
574
14448
        if (size == 0) {
575
            av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
576
            continue;
577
        }
578
579
28896
        ref = (nal->data == nal->raw_data) ? frag->data_ref
580
14448
                                           : packet->rbsp.rbsp_buffer_ref;
581
582
14448
        err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
583
14448
                            (uint8_t*)nal->data, size, ref);
584
14448
        if (err < 0)
585
            return err;
586
    }
587
588
4502
    return 0;
589
}
590
591
4502
static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
592
                                    CodedBitstreamFragment *frag,
593
                                    int header)
594
{
595
4502
    enum AVCodecID codec_id = ctx->codec->codec_id;
596
4502
    CodedBitstreamH2645Context *priv = ctx->priv_data;
597
    GetByteContext gbc;
598
    int err;
599
600

4502
    av_assert0(frag->data && frag->nb_units == 0);
601
4502
    if (frag->data_size == 0)
602
        return 0;
603
604

4502
    if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
605
        // AVCC header.
606
        size_t size, start, end;
607
        int i, count, version;
608
609
        priv->mp4 = 1;
610
611
        bytestream2_init(&gbc, frag->data, frag->data_size);
612
613
        if (bytestream2_get_bytes_left(&gbc) < 6)
614
            return AVERROR_INVALIDDATA;
615
616
        version = bytestream2_get_byte(&gbc);
617
        if (version != 1) {
618
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
619
                   "first byte %u.\n", version);
620
            return AVERROR_INVALIDDATA;
621
        }
622
623
        bytestream2_skip(&gbc, 3);
624
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
625
626
        // SPS array.
627
        count = bytestream2_get_byte(&gbc) & 0x1f;
628
        start = bytestream2_tell(&gbc);
629
        for (i = 0; i < count; i++) {
630
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
631
                return AVERROR_INVALIDDATA;
632
            size = bytestream2_get_be16(&gbc);
633
            if (bytestream2_get_bytes_left(&gbc) < size)
634
                return AVERROR_INVALIDDATA;
635
            bytestream2_skip(&gbc, size);
636
        }
637
        end = bytestream2_tell(&gbc);
638
639
        err = ff_h2645_packet_split(&priv->read_packet,
640
                                    frag->data + start, end - start,
641
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
642
        if (err < 0) {
643
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
644
            return err;
645
        }
646
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
647
        if (err < 0)
648
            return err;
649
650
        // PPS array.
651
        count = bytestream2_get_byte(&gbc);
652
        start = bytestream2_tell(&gbc);
653
        for (i = 0; i < count; i++) {
654
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
655
                return AVERROR_INVALIDDATA;
656
            size = bytestream2_get_be16(&gbc);
657
            if (bytestream2_get_bytes_left(&gbc) < size)
658
                return AVERROR_INVALIDDATA;
659
            bytestream2_skip(&gbc, size);
660
        }
661
        end = bytestream2_tell(&gbc);
662
663
        err = ff_h2645_packet_split(&priv->read_packet,
664
                                    frag->data + start, end - start,
665
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
666
        if (err < 0) {
667
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
668
            return err;
669
        }
670
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
671
        if (err < 0)
672
            return err;
673
674
        if (bytestream2_get_bytes_left(&gbc) > 0) {
675
            av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
676
                   "header.\n", bytestream2_get_bytes_left(&gbc));
677
        }
678
679

4502
    } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
680
        // HVCC header.
681
        size_t size, start, end;
682
        int i, j, nb_arrays, nal_unit_type, nb_nals, version;
683
684
        priv->mp4 = 1;
685
686
        bytestream2_init(&gbc, frag->data, frag->data_size);
687
688
        if (bytestream2_get_bytes_left(&gbc) < 23)
689
            return AVERROR_INVALIDDATA;
690
691
        version = bytestream2_get_byte(&gbc);
692
        if (version != 1) {
693
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
694
                   "first byte %u.\n", version);
695
            return AVERROR_INVALIDDATA;
696
        }
697
698
        bytestream2_skip(&gbc, 20);
699
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
700
701
        nb_arrays = bytestream2_get_byte(&gbc);
702
        for (i = 0; i < nb_arrays; i++) {
703
            nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
704
            nb_nals = bytestream2_get_be16(&gbc);
705
706
            start = bytestream2_tell(&gbc);
707
            for (j = 0; j < nb_nals; j++) {
708
                if (bytestream2_get_bytes_left(&gbc) < 2)
709
                    return AVERROR_INVALIDDATA;
710
                size = bytestream2_get_be16(&gbc);
711
                if (bytestream2_get_bytes_left(&gbc) < size)
712
                    return AVERROR_INVALIDDATA;
713
                bytestream2_skip(&gbc, size);
714
            }
715
            end = bytestream2_tell(&gbc);
716
717
            err = ff_h2645_packet_split(&priv->read_packet,
718
                                        frag->data + start, end - start,
719
                                        ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
720
            if (err < 0) {
721
                av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
722
                       "HVCC array %d (%d NAL units of type %d).\n",
723
                       i, nb_nals, nal_unit_type);
724
                return err;
725
            }
726
            err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
727
            if (err < 0)
728
                return err;
729
        }
730
731
    } else {
732
        // Annex B, or later MP4 with already-known parameters.
733
734
4502
        err = ff_h2645_packet_split(&priv->read_packet,
735
4502
                                    frag->data, frag->data_size,
736
                                    ctx->log_ctx,
737
                                    priv->mp4, priv->nal_length_size,
738
                                    codec_id, 1, 1);
739
4502
        if (err < 0)
740
            return err;
741
742
4502
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
743
4502
        if (err < 0)
744
            return err;
745
    }
746
747
4502
    return 0;
748
}
749
750
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
751
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
752
                                                  CodedBitstreamUnit *unit)  \
753
{ \
754
    CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
755
    H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
756
    unsigned int id = ps_var->id_element; \
757
    if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
758
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
759
               " id : %d.\n", id); \
760
        return AVERROR_INVALIDDATA; \
761
    } \
762
    if (priv->ps_var[id] == priv->active_ ## ps_var) \
763
        priv->active_ ## ps_var = NULL ; \
764
    av_buffer_unref(&priv->ps_var ## _ref[id]); \
765
    if (unit->content_ref) \
766
        priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
767
    else \
768
        priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
769
    if (!priv->ps_var ## _ref[id]) \
770
        return AVERROR(ENOMEM); \
771
    priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
772
    if (!unit->content_ref) \
773
        memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
774
    return 0; \
775
}
776
777


80
cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
778


2364
cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
779


96
cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
780


100
cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
781


550
cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
782
783
6616
static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
784
                                  CodedBitstreamUnit *unit)
785
{
786
    GetBitContext gbc;
787
    int err;
788
789
6616
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
790
6616
    if (err < 0)
791
        return err;
792
793


6616
    switch (unit->type) {
794
40
    case H264_NAL_SPS:
795
        {
796
            H264RawSPS *sps;
797
798
40
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
799
40
            if (err < 0)
800
                return err;
801
40
            sps = unit->content;
802
803
40
            err = cbs_h264_read_sps(ctx, &gbc, sps);
804
40
            if (err < 0)
805
                return err;
806
807
40
            err = cbs_h264_replace_sps(ctx, unit);
808
40
            if (err < 0)
809
                return err;
810
        }
811
40
        break;
812
813
    case H264_NAL_SPS_EXT:
814
        {
815
            err = ff_cbs_alloc_unit_content(ctx, unit,
816
                                            sizeof(H264RawSPSExtension),
817
                                            NULL);
818
            if (err < 0)
819
                return err;
820
821
            err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
822
            if (err < 0)
823
                return err;
824
        }
825
        break;
826
827
1182
    case H264_NAL_PPS:
828
        {
829
            H264RawPPS *pps;
830
831
1182
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
832
                                            &cbs_h264_free_pps);
833
1182
            if (err < 0)
834
                return err;
835
1182
            pps = unit->content;
836
837
1182
            err = cbs_h264_read_pps(ctx, &gbc, pps);
838
1182
            if (err < 0)
839
                return err;
840
841
1182
            err = cbs_h264_replace_pps(ctx, unit);
842
1182
            if (err < 0)
843
                return err;
844
        }
845
1182
        break;
846
847
4913
    case H264_NAL_SLICE:
848
    case H264_NAL_IDR_SLICE:
849
    case H264_NAL_AUXILIARY_SLICE:
850
        {
851
            H264RawSlice *slice;
852
            int pos, len;
853
854
4913
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
855
                                            &cbs_h264_free_slice);
856
4913
            if (err < 0)
857
                return err;
858
4913
            slice = unit->content;
859
860
4913
            err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
861
4913
            if (err < 0)
862
                return err;
863
864
4913
            if (!cbs_h2645_read_more_rbsp_data(&gbc))
865
                return AVERROR_INVALIDDATA;
866
867
4913
            pos = get_bits_count(&gbc);
868
4913
            len = unit->data_size;
869
870
4913
            slice->data_size = len - pos / 8;
871
4913
            slice->data_ref  = av_buffer_ref(unit->data_ref);
872
4913
            if (!slice->data_ref)
873
                return AVERROR(ENOMEM);
874
4913
            slice->data = unit->data + pos / 8;
875
4913
            slice->data_bit_start = pos % 8;
876
        }
877
4913
        break;
878
879
195
    case H264_NAL_AUD:
880
        {
881
195
            err = ff_cbs_alloc_unit_content(ctx, unit,
882
                                            sizeof(H264RawAUD), NULL);
883
195
            if (err < 0)
884
                return err;
885
886
195
            err = cbs_h264_read_aud(ctx, &gbc, unit->content);
887
195
            if (err < 0)
888
                return err;
889
        }
890
195
        break;
891
892
283
    case H264_NAL_SEI:
893
        {
894
283
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
895
                                            &cbs_h264_free_sei);
896
283
            if (err < 0)
897
                return err;
898
899
283
            err = cbs_h264_read_sei(ctx, &gbc, unit->content);
900
283
            if (err < 0)
901
                return err;
902
        }
903
283
        break;
904
905
    case H264_NAL_FILLER_DATA:
906
        {
907
            err = ff_cbs_alloc_unit_content(ctx, unit,
908
                                            sizeof(H264RawFiller), NULL);
909
            if (err < 0)
910
                return err;
911
912
            err = cbs_h264_read_filler(ctx, &gbc, unit->content);
913
            if (err < 0)
914
                return err;
915
        }
916
        break;
917
918
3
    case H264_NAL_END_SEQUENCE:
919
    case H264_NAL_END_STREAM:
920
        {
921
3
            err = ff_cbs_alloc_unit_content(ctx, unit,
922
                                            sizeof(H264RawNALUnitHeader),
923
                                            NULL);
924
3
            if (err < 0)
925
                return err;
926
927
3
            err = (unit->type == H264_NAL_END_SEQUENCE ?
928
3
                   cbs_h264_read_end_of_sequence :
929
3
                   cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
930
3
            if (err < 0)
931
                return err;
932
        }
933
3
        break;
934
935
    default:
936
        return AVERROR(ENOSYS);
937
    }
938
939
6616
    return 0;
940
}
941
942
7832
static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
943
                                  CodedBitstreamUnit *unit)
944
{
945
    GetBitContext gbc;
946
    int err;
947
948
7832
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
949
7832
    if (err < 0)
950
        return err;
951
952

7832
    switch (unit->type) {
953
48
    case HEVC_NAL_VPS:
954
        {
955
            H265RawVPS *vps;
956
957
48
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
958
                                            &cbs_h265_free_vps);
959
48
            if (err < 0)
960
                return err;
961
48
            vps = unit->content;
962
963
48
            err = cbs_h265_read_vps(ctx, &gbc, vps);
964
48
            if (err < 0)
965
                return err;
966
967
48
            err = cbs_h265_replace_vps(ctx, unit);
968
48
            if (err < 0)
969
                return err;
970
        }
971
48
        break;
972
50
    case HEVC_NAL_SPS:
973
        {
974
            H265RawSPS *sps;
975
976
50
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
977
                                            &cbs_h265_free_sps);
978
50
            if (err < 0)
979
                return err;
980
50
            sps = unit->content;
981
982
50
            err = cbs_h265_read_sps(ctx, &gbc, sps);
983
50
            if (err < 0)
984
                return err;
985
986
50
            err = cbs_h265_replace_sps(ctx, unit);
987
50
            if (err < 0)
988
                return err;
989
        }
990
50
        break;
991
992
275
    case HEVC_NAL_PPS:
993
        {
994
            H265RawPPS *pps;
995
996
275
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
997
                                            &cbs_h265_free_pps);
998
275
            if (err < 0)
999
                return err;
1000
275
            pps = unit->content;
1001
1002
275
            err = cbs_h265_read_pps(ctx, &gbc, pps);
1003
275
            if (err < 0)
1004
                return err;
1005
1006
275
            err = cbs_h265_replace_pps(ctx, unit);
1007
275
            if (err < 0)
1008
                return err;
1009
        }
1010
275
        break;
1011
1012
5864
    case HEVC_NAL_TRAIL_N:
1013
    case HEVC_NAL_TRAIL_R:
1014
    case HEVC_NAL_TSA_N:
1015
    case HEVC_NAL_TSA_R:
1016
    case HEVC_NAL_STSA_N:
1017
    case HEVC_NAL_STSA_R:
1018
    case HEVC_NAL_RADL_N:
1019
    case HEVC_NAL_RADL_R:
1020
    case HEVC_NAL_RASL_N:
1021
    case HEVC_NAL_RASL_R:
1022
    case HEVC_NAL_BLA_W_LP:
1023
    case HEVC_NAL_BLA_W_RADL:
1024
    case HEVC_NAL_BLA_N_LP:
1025
    case HEVC_NAL_IDR_W_RADL:
1026
    case HEVC_NAL_IDR_N_LP:
1027
    case HEVC_NAL_CRA_NUT:
1028
        {
1029
            H265RawSlice *slice;
1030
            int pos, len;
1031
1032
5864
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
1033
                                            &cbs_h265_free_slice);
1034
5864
            if (err < 0)
1035
                return err;
1036
5864
            slice = unit->content;
1037
1038
5864
            err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
1039
5864
            if (err < 0)
1040
                return err;
1041
1042
5864
            if (!cbs_h2645_read_more_rbsp_data(&gbc))
1043
                return AVERROR_INVALIDDATA;
1044
1045
5864
            pos = get_bits_count(&gbc);
1046
5864
            len = unit->data_size;
1047
1048
5864
            slice->data_size = len - pos / 8;
1049
5864
            slice->data_ref  = av_buffer_ref(unit->data_ref);
1050
5864
            if (!slice->data_ref)
1051
                return AVERROR(ENOMEM);
1052
5864
            slice->data = unit->data + pos / 8;
1053
5864
            slice->data_bit_start = pos % 8;
1054
        }
1055
5864
        break;
1056
1057
60
    case HEVC_NAL_AUD:
1058
        {
1059
60
            err = ff_cbs_alloc_unit_content(ctx, unit,
1060
                                            sizeof(H265RawAUD), NULL);
1061
60
            if (err < 0)
1062
                return err;
1063
1064
60
            err = cbs_h265_read_aud(ctx, &gbc, unit->content);
1065
60
            if (err < 0)
1066
                return err;
1067
        }
1068
60
        break;
1069
1070
1535
    case HEVC_NAL_SEI_PREFIX:
1071
    case HEVC_NAL_SEI_SUFFIX:
1072
        {
1073
1535
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
1074
                                            &cbs_h265_free_sei);
1075
1076
1535
            if (err < 0)
1077
                return err;
1078
1079
1535
            err = cbs_h265_read_sei(ctx, &gbc, unit->content,
1080
1535
                                    unit->type == HEVC_NAL_SEI_PREFIX);
1081
1082
1535
            if (err < 0)
1083
                return err;
1084
        }
1085
1535
        break;
1086
1087
    default:
1088
        return AVERROR(ENOSYS);
1089
    }
1090
1091
7832
    return 0;
1092
}
1093
1094
10777
static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
1095
                                      PutBitContext *pbc, const uint8_t *data,
1096
                                      size_t data_size, int data_bit_start)
1097
{
1098
10777
    size_t rest  = data_size - (data_bit_start + 7) / 8;
1099
10777
    const uint8_t *pos = data + data_bit_start / 8;
1100
1101

10777
    av_assert0(data_bit_start >= 0 &&
1102
               data_size > data_bit_start / 8);
1103
1104
10777
    if (data_size * 8 + 8 > put_bits_left(pbc))
1105
        return AVERROR(ENOSPC);
1106
1107
10777
    if (!rest)
1108
1
        goto rbsp_stop_one_bit;
1109
1110
    // First copy the remaining bits of the first byte
1111
    // The above check ensures that we do not accidentally
1112
    // copy beyond the rbsp_stop_one_bit.
1113
10776
    if (data_bit_start % 8)
1114
3547
        put_bits(pbc, 8 - data_bit_start % 8,
1115
3547
                 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
1116
1117
10776
    if (put_bits_count(pbc) % 8 == 0) {
1118
        // If the writer is aligned at this point,
1119
        // memcpy can be used to improve performance.
1120
        // This happens normally for CABAC.
1121
10776
        flush_put_bits(pbc);
1122
10776
        memcpy(put_bits_ptr(pbc), pos, rest);
1123
10776
        skip_put_bytes(pbc, rest);
1124
    } else {
1125
        // If not, we have to copy manually.
1126
        // rbsp_stop_one_bit forces us to special-case
1127
        // the last byte.
1128
        uint8_t temp;
1129
        int i;
1130
1131
        for (; rest > 4; rest -= 4, pos += 4)
1132
            put_bits32(pbc, AV_RB32(pos));
1133
1134
        for (; rest > 1; rest--, pos++)
1135
            put_bits(pbc, 8, *pos);
1136
1137
    rbsp_stop_one_bit:
1138
1
        temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
1139
1140
1
        av_assert0(temp);
1141
1
        i = ff_ctz(*pos);
1142
1
        temp = temp >> i;
1143
1
        i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
1144
1
        put_bits(pbc, i, temp);
1145
1
        if (put_bits_count(pbc) % 8)
1146
            put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
1147
    }
1148
1149
10777
    return 0;
1150
}
1151
1152
6616
static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
1153
                                   CodedBitstreamUnit *unit,
1154
                                   PutBitContext *pbc)
1155
{
1156
    int err;
1157
1158


6616
    switch (unit->type) {
1159
40
    case H264_NAL_SPS:
1160
        {
1161
40
            H264RawSPS *sps = unit->content;
1162
1163
40
            err = cbs_h264_write_sps(ctx, pbc, sps);
1164
40
            if (err < 0)
1165
                return err;
1166
1167
40
            err = cbs_h264_replace_sps(ctx, unit);
1168
40
            if (err < 0)
1169
                return err;
1170
        }
1171
40
        break;
1172
1173
    case H264_NAL_SPS_EXT:
1174
        {
1175
            H264RawSPSExtension *sps_ext = unit->content;
1176
1177
            err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1178
            if (err < 0)
1179
                return err;
1180
        }
1181
        break;
1182
1183
1182
    case H264_NAL_PPS:
1184
        {
1185
1182
            H264RawPPS *pps = unit->content;
1186
1187
1182
            err = cbs_h264_write_pps(ctx, pbc, pps);
1188
1182
            if (err < 0)
1189
                return err;
1190
1191
1182
            err = cbs_h264_replace_pps(ctx, unit);
1192
1182
            if (err < 0)
1193
                return err;
1194
        }
1195
1182
        break;
1196
1197
4913
    case H264_NAL_SLICE:
1198
    case H264_NAL_IDR_SLICE:
1199
    case H264_NAL_AUXILIARY_SLICE:
1200
        {
1201
4913
            H264RawSlice *slice = unit->content;
1202
1203
4913
            err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1204
4913
            if (err < 0)
1205
                return err;
1206
1207
4913
            if (slice->data) {
1208
4913
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1209
                                                 slice->data_size,
1210
                                                 slice->data_bit_start);
1211
4913
                if (err < 0)
1212
                    return err;
1213
            } else {
1214
                // No slice data - that was just the header.
1215
                // (Bitstream may be unaligned!)
1216
            }
1217
        }
1218
4913
        break;
1219
1220
195
    case H264_NAL_AUD:
1221
        {
1222
195
            err = cbs_h264_write_aud(ctx, pbc, unit->content);
1223
195
            if (err < 0)
1224
                return err;
1225
        }
1226
195
        break;
1227
1228
283
    case H264_NAL_SEI:
1229
        {
1230
283
            err = cbs_h264_write_sei(ctx, pbc, unit->content);
1231
283
            if (err < 0)
1232
                return err;
1233
        }
1234
283
        break;
1235
1236
    case H264_NAL_FILLER_DATA:
1237
        {
1238
            err = cbs_h264_write_filler(ctx, pbc, unit->content);
1239
            if (err < 0)
1240
                return err;
1241
        }
1242
        break;
1243
1244
1
    case H264_NAL_END_SEQUENCE:
1245
        {
1246
1
            err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1247
1
            if (err < 0)
1248
                return err;
1249
        }
1250
1
        break;
1251
1252
2
    case H264_NAL_END_STREAM:
1253
        {
1254
2
            err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1255
2
            if (err < 0)
1256
                return err;
1257
        }
1258
2
        break;
1259
1260
    default:
1261
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1262
               "NAL unit type %"PRIu32".\n", unit->type);
1263
        return AVERROR_PATCHWELCOME;
1264
    }
1265
1266
6616
    return 0;
1267
}
1268
1269
7832
static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1270
                                   CodedBitstreamUnit *unit,
1271
                                   PutBitContext *pbc)
1272
{
1273
    int err;
1274
1275

7832
    switch (unit->type) {
1276
48
    case HEVC_NAL_VPS:
1277
        {
1278
48
            H265RawVPS *vps = unit->content;
1279
1280
48
            err = cbs_h265_write_vps(ctx, pbc, vps);
1281
48
            if (err < 0)
1282
                return err;
1283
1284
48
            err = cbs_h265_replace_vps(ctx, unit);
1285
48
            if (err < 0)
1286
                return err;
1287
        }
1288
48
        break;
1289
1290
50
    case HEVC_NAL_SPS:
1291
        {
1292
50
            H265RawSPS *sps = unit->content;
1293
1294
50
            err = cbs_h265_write_sps(ctx, pbc, sps);
1295
50
            if (err < 0)
1296
                return err;
1297
1298
50
            err = cbs_h265_replace_sps(ctx, unit);
1299
50
            if (err < 0)
1300
                return err;
1301
        }
1302
50
        break;
1303
1304
275
    case HEVC_NAL_PPS:
1305
        {
1306
275
            H265RawPPS *pps = unit->content;
1307
1308
275
            err = cbs_h265_write_pps(ctx, pbc, pps);
1309
275
            if (err < 0)
1310
                return err;
1311
1312
275
            err = cbs_h265_replace_pps(ctx, unit);
1313
275
            if (err < 0)
1314
                return err;
1315
        }
1316
275
        break;
1317
1318
5864
    case HEVC_NAL_TRAIL_N:
1319
    case HEVC_NAL_TRAIL_R:
1320
    case HEVC_NAL_TSA_N:
1321
    case HEVC_NAL_TSA_R:
1322
    case HEVC_NAL_STSA_N:
1323
    case HEVC_NAL_STSA_R:
1324
    case HEVC_NAL_RADL_N:
1325
    case HEVC_NAL_RADL_R:
1326
    case HEVC_NAL_RASL_N:
1327
    case HEVC_NAL_RASL_R:
1328
    case HEVC_NAL_BLA_W_LP:
1329
    case HEVC_NAL_BLA_W_RADL:
1330
    case HEVC_NAL_BLA_N_LP:
1331
    case HEVC_NAL_IDR_W_RADL:
1332
    case HEVC_NAL_IDR_N_LP:
1333
    case HEVC_NAL_CRA_NUT:
1334
        {
1335
5864
            H265RawSlice *slice = unit->content;
1336
1337
5864
            err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1338
5864
            if (err < 0)
1339
                return err;
1340
1341
5864
            if (slice->data) {
1342
5864
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1343
                                                 slice->data_size,
1344
                                                 slice->data_bit_start);
1345
5864
                if (err < 0)
1346
                    return err;
1347
            } else {
1348
                // No slice data - that was just the header.
1349
            }
1350
        }
1351
5864
        break;
1352
1353
60
    case HEVC_NAL_AUD:
1354
        {
1355
60
            err = cbs_h265_write_aud(ctx, pbc, unit->content);
1356
60
            if (err < 0)
1357
                return err;
1358
        }
1359
60
        break;
1360
1361
1535
    case HEVC_NAL_SEI_PREFIX:
1362
    case HEVC_NAL_SEI_SUFFIX:
1363
        {
1364
1535
            err = cbs_h265_write_sei(ctx, pbc, unit->content,
1365
1535
                                     unit->type == HEVC_NAL_SEI_PREFIX);
1366
1367
1535
            if (err < 0)
1368
                return err;
1369
        }
1370
1535
        break;
1371
1372
    default:
1373
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1374
               "NAL unit type %"PRIu32".\n", unit->type);
1375
        return AVERROR_PATCHWELCOME;
1376
    }
1377
1378
7832
    return 0;
1379
}
1380
1381
4502
static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1382
                                       CodedBitstreamFragment *frag)
1383
{
1384
    uint8_t *data;
1385
    size_t max_size, dp, sp;
1386
    int err, i, zero_run;
1387
1388
18950
    for (i = 0; i < frag->nb_units; i++) {
1389
        // Data should already all have been written when we get here.
1390
14448
        av_assert0(frag->units[i].data);
1391
    }
1392
1393
4502
    max_size = 0;
1394
18950
    for (i = 0; i < frag->nb_units; i++) {
1395
        // Start code + content with worst-case emulation prevention.
1396
14448
        max_size += 4 + frag->units[i].data_size * 3 / 2;
1397
    }
1398
1399
4502
    data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1400
4502
    if (!data)
1401
        return AVERROR(ENOMEM);
1402
1403
4502
    dp = 0;
1404
18950
    for (i = 0; i < frag->nb_units; i++) {
1405
14448
        CodedBitstreamUnit *unit = &frag->units[i];
1406
1407
14448
        if (unit->data_bit_padding > 0) {
1408
            if (i < frag->nb_units - 1)
1409
                av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1410
                       "unaligned padding on non-final NAL unit.\n");
1411
            else
1412
                frag->data_bit_padding = unit->data_bit_padding;
1413
        }
1414
1415
14448
        if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1416
6616
             (unit->type == H264_NAL_SPS ||
1417
6576
              unit->type == H264_NAL_PPS)) ||
1418
13226
            (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1419
7832
             (unit->type == HEVC_NAL_VPS ||
1420
7784
              unit->type == HEVC_NAL_SPS ||
1421

13128
              unit->type == HEVC_NAL_PPS)) ||
1422
            i == 0 /* (Assume this is the start of an access unit.) */) {
1423
            // zero_byte
1424
5026
            data[dp++] = 0;
1425
        }
1426
        // start_code_prefix_one_3bytes
1427
14448
        data[dp++] = 0;
1428
14448
        data[dp++] = 0;
1429
14448
        data[dp++] = 1;
1430
1431
14448
        zero_run = 0;
1432
10695035
        for (sp = 0; sp < unit->data_size; sp++) {
1433
10680587
            if (zero_run < 2) {
1434
10676594
                if (unit->data[sp] == 0)
1435
106112
                    ++zero_run;
1436
                else
1437
10570482
                    zero_run = 0;
1438
            } else {
1439
3993
                if ((unit->data[sp] & ~3) == 0) {
1440
                    // emulation_prevention_three_byte
1441
748
                    data[dp++] = 3;
1442
                }
1443
3993
                zero_run = unit->data[sp] == 0;
1444
            }
1445
10680587
            data[dp++] = unit->data[sp];
1446
        }
1447
    }
1448
1449
4502
    av_assert0(dp <= max_size);
1450
4502
    err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1451
4502
    if (err)
1452
        return err;
1453
4502
    memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1454
1455
4502
    frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1456
                                      NULL, NULL, 0);
1457
4502
    if (!frag->data_ref) {
1458
        av_freep(&data);
1459
        return AVERROR(ENOMEM);
1460
    }
1461
1462
4502
    frag->data = data;
1463
4502
    frag->data_size = dp;
1464
1465
4502
    return 0;
1466
}
1467
1468
15
static void cbs_h264_close(CodedBitstreamContext *ctx)
1469
{
1470
15
    CodedBitstreamH264Context *h264 = ctx->priv_data;
1471
    int i;
1472
1473
15
    ff_h2645_packet_uninit(&h264->common.read_packet);
1474
1475
495
    for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1476
480
        av_buffer_unref(&h264->sps_ref[i]);
1477
3855
    for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1478
3840
        av_buffer_unref(&h264->pps_ref[i]);
1479
15
}
1480
1481
20
static void cbs_h265_close(CodedBitstreamContext *ctx)
1482
{
1483
20
    CodedBitstreamH265Context *h265 = ctx->priv_data;
1484
    int i;
1485
1486
20
    ff_h2645_packet_uninit(&h265->common.read_packet);
1487
1488
340
    for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1489
320
        av_buffer_unref(&h265->vps_ref[i]);
1490
340
    for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1491
320
        av_buffer_unref(&h265->sps_ref[i]);
1492
1300
    for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1493
1280
        av_buffer_unref(&h265->pps_ref[i]);
1494
20
}
1495
1496
const CodedBitstreamType ff_cbs_type_h264 = {
1497
    .codec_id          = AV_CODEC_ID_H264,
1498
1499
    .priv_data_size    = sizeof(CodedBitstreamH264Context),
1500
1501
    .split_fragment    = &cbs_h2645_split_fragment,
1502
    .read_unit         = &cbs_h264_read_nal_unit,
1503
    .write_unit        = &cbs_h264_write_nal_unit,
1504
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1505
1506
    .close             = &cbs_h264_close,
1507
};
1508
1509
const CodedBitstreamType ff_cbs_type_h265 = {
1510
    .codec_id          = AV_CODEC_ID_HEVC,
1511
1512
    .priv_data_size    = sizeof(CodedBitstreamH265Context),
1513
1514
    .split_fragment    = &cbs_h2645_split_fragment,
1515
    .read_unit         = &cbs_h265_read_nal_unit,
1516
    .write_unit        = &cbs_h265_write_nal_unit,
1517
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1518
1519
    .close             = &cbs_h265_close,
1520
};
1521
1522
int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
1523
                                CodedBitstreamFragment *au,
1524
                                H264RawSEIPayload *payload)
1525
{
1526
    H264RawSEI *sei = NULL;
1527
    int err, i;
1528
1529
    // Find an existing SEI NAL unit to add to.
1530
    for (i = 0; i < au->nb_units; i++) {
1531
        if (au->units[i].type == H264_NAL_SEI) {
1532
            sei = au->units[i].content;
1533
            if (sei->payload_count < H264_MAX_SEI_PAYLOADS)
1534
                break;
1535
1536
            sei = NULL;
1537
        }
1538
    }
1539
1540
    if (!sei) {
1541
        // Need to make a new SEI NAL unit.  Insert it before the first
1542
        // slice data NAL unit; if no slice data, add at the end.
1543
        AVBufferRef *sei_ref;
1544
1545
        sei = av_mallocz(sizeof(*sei));
1546
        if (!sei) {
1547
            err = AVERROR(ENOMEM);
1548
            goto fail;
1549
        }
1550
1551
        sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1552
        sei->nal_unit_header.nal_ref_idc   = 0;
1553
1554
        sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1555
                                   &cbs_h264_free_sei, NULL, 0);
1556
        if (!sei_ref) {
1557
            av_freep(&sei);
1558
            err = AVERROR(ENOMEM);
1559
            goto fail;
1560
        }
1561
1562
        for (i = 0; i < au->nb_units; i++) {
1563
            if (au->units[i].type == H264_NAL_SLICE ||
1564
                au->units[i].type == H264_NAL_IDR_SLICE)
1565
                break;
1566
        }
1567
1568
        err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
1569
                                         sei, sei_ref);
1570
        av_buffer_unref(&sei_ref);
1571
        if (err < 0)
1572
            goto fail;
1573
    }
1574
1575
    memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1576
    ++sei->payload_count;
1577
1578
    return 0;
1579
fail:
1580
    cbs_h264_free_sei_payload(payload);
1581
    return err;
1582
}
1583
1584
void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
1585
                                    CodedBitstreamFragment *au,
1586
                                    CodedBitstreamUnit *nal,
1587
                                    int position)
1588
{
1589
    H264RawSEI *sei = nal->content;
1590
1591
    av_assert0(nal->type == H264_NAL_SEI);
1592
    av_assert0(position >= 0 && position < sei->payload_count);
1593
1594
    if (position == 0 && sei->payload_count == 1) {
1595
        // Deleting NAL unit entirely.
1596
        int i;
1597
1598
        for (i = 0; i < au->nb_units; i++) {
1599
            if (&au->units[i] == nal)
1600
                break;
1601
        }
1602
1603
        ff_cbs_delete_unit(ctx, au, i);
1604
    } else {
1605
        cbs_h264_free_sei_payload(&sei->payload[position]);
1606
1607
        --sei->payload_count;
1608
        memmove(sei->payload + position,
1609
                sei->payload + position + 1,
1610
                (sei->payload_count - position) * sizeof(*sei->payload));
1611
    }
1612
}