GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/cbs_h2645.c Lines: 445 735 60.5 %
Date: 2019-11-18 18:00:01 Branches: 249 507 49.1 %

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
3020
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
326
{
327
3020
    int bits_left = get_bits_left(gbc);
328
3020
    if (bits_left > 8)
329
20
        return 1;
330
3000
    if (bits_left == 0)
331
        return 0;
332
3000
    if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
333
        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
        // Remove trailing zeroes.
569

22282
        while (size > 0 && nal->data[size - 1] == 0)
570
7834
            --size;
571
14448
        av_assert0(size > 0);
572
573
28896
        ref = (nal->data == nal->raw_data) ? frag->data_ref
574
14448
                                           : packet->rbsp.rbsp_buffer_ref;
575
576
14448
        err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
577
14448
                            (uint8_t*)nal->data, size, ref);
578
14448
        if (err < 0)
579
            return err;
580
    }
581
582
4502
    return 0;
583
}
584
585
4502
static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
586
                                    CodedBitstreamFragment *frag,
587
                                    int header)
588
{
589
4502
    enum AVCodecID codec_id = ctx->codec->codec_id;
590
4502
    CodedBitstreamH2645Context *priv = ctx->priv_data;
591
    GetByteContext gbc;
592
    int err;
593
594

4502
    av_assert0(frag->data && frag->nb_units == 0);
595
4502
    if (frag->data_size == 0)
596
        return 0;
597
598

4502
    if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
599
        // AVCC header.
600
        size_t size, start, end;
601
        int i, count, version;
602
603
        priv->mp4 = 1;
604
605
        bytestream2_init(&gbc, frag->data, frag->data_size);
606
607
        if (bytestream2_get_bytes_left(&gbc) < 6)
608
            return AVERROR_INVALIDDATA;
609
610
        version = bytestream2_get_byte(&gbc);
611
        if (version != 1) {
612
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
613
                   "first byte %u.", version);
614
            return AVERROR_INVALIDDATA;
615
        }
616
617
        bytestream2_skip(&gbc, 3);
618
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
619
620
        // SPS array.
621
        count = bytestream2_get_byte(&gbc) & 0x1f;
622
        start = bytestream2_tell(&gbc);
623
        for (i = 0; i < count; i++) {
624
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
625
                return AVERROR_INVALIDDATA;
626
            size = bytestream2_get_be16(&gbc);
627
            if (bytestream2_get_bytes_left(&gbc) < size)
628
                return AVERROR_INVALIDDATA;
629
            bytestream2_skip(&gbc, size);
630
        }
631
        end = bytestream2_tell(&gbc);
632
633
        err = ff_h2645_packet_split(&priv->read_packet,
634
                                    frag->data + start, end - start,
635
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
636
        if (err < 0) {
637
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
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
        // PPS array.
645
        count = bytestream2_get_byte(&gbc);
646
        start = bytestream2_tell(&gbc);
647
        for (i = 0; i < count; i++) {
648
            if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
649
                return AVERROR_INVALIDDATA;
650
            size = bytestream2_get_be16(&gbc);
651
            if (bytestream2_get_bytes_left(&gbc) < size)
652
                return AVERROR_INVALIDDATA;
653
            bytestream2_skip(&gbc, size);
654
        }
655
        end = bytestream2_tell(&gbc);
656
657
        err = ff_h2645_packet_split(&priv->read_packet,
658
                                    frag->data + start, end - start,
659
                                    ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
660
        if (err < 0) {
661
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
662
            return err;
663
        }
664
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
665
        if (err < 0)
666
            return err;
667
668
        if (bytestream2_get_bytes_left(&gbc) > 0) {
669
            av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
670
                   "header.\n", bytestream2_get_bytes_left(&gbc));
671
        }
672
673

4502
    } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
674
        // HVCC header.
675
        size_t size, start, end;
676
        int i, j, nb_arrays, nal_unit_type, nb_nals, version;
677
678
        priv->mp4 = 1;
679
680
        bytestream2_init(&gbc, frag->data, frag->data_size);
681
682
        if (bytestream2_get_bytes_left(&gbc) < 23)
683
            return AVERROR_INVALIDDATA;
684
685
        version = bytestream2_get_byte(&gbc);
686
        if (version != 1) {
687
            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
688
                   "first byte %u.", version);
689
            return AVERROR_INVALIDDATA;
690
        }
691
692
        bytestream2_skip(&gbc, 20);
693
        priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
694
695
        nb_arrays = bytestream2_get_byte(&gbc);
696
        for (i = 0; i < nb_arrays; i++) {
697
            nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
698
            nb_nals = bytestream2_get_be16(&gbc);
699
700
            start = bytestream2_tell(&gbc);
701
            for (j = 0; j < nb_nals; j++) {
702
                if (bytestream2_get_bytes_left(&gbc) < 2)
703
                    return AVERROR_INVALIDDATA;
704
                size = bytestream2_get_be16(&gbc);
705
                if (bytestream2_get_bytes_left(&gbc) < size)
706
                    return AVERROR_INVALIDDATA;
707
                bytestream2_skip(&gbc, size);
708
            }
709
            end = bytestream2_tell(&gbc);
710
711
            err = ff_h2645_packet_split(&priv->read_packet,
712
                                        frag->data + start, end - start,
713
                                        ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
714
            if (err < 0) {
715
                av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
716
                       "HVCC array %d (%d NAL units of type %d).\n",
717
                       i, nb_nals, nal_unit_type);
718
                return err;
719
            }
720
            err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
721
            if (err < 0)
722
                return err;
723
        }
724
725
    } else {
726
        // Annex B, or later MP4 with already-known parameters.
727
728
4502
        err = ff_h2645_packet_split(&priv->read_packet,
729
4502
                                    frag->data, frag->data_size,
730
                                    ctx->log_ctx,
731
                                    priv->mp4, priv->nal_length_size,
732
                                    codec_id, 1, 1);
733
4502
        if (err < 0)
734
            return err;
735
736
4502
        err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
737
4502
        if (err < 0)
738
            return err;
739
    }
740
741
4502
    return 0;
742
}
743
744
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
745
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
746
                                                  CodedBitstreamUnit *unit)  \
747
{ \
748
    CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
749
    H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
750
    unsigned int id = ps_var->id_element; \
751
    if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
752
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
753
               " id : %d.\n", id); \
754
        return AVERROR_INVALIDDATA; \
755
    } \
756
    if (priv->ps_var[id] == priv->active_ ## ps_var) \
757
        priv->active_ ## ps_var = NULL ; \
758
    av_buffer_unref(&priv->ps_var ## _ref[id]); \
759
    if (unit->content_ref) \
760
        priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
761
    else \
762
        priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
763
    if (!priv->ps_var ## _ref[id]) \
764
        return AVERROR(ENOMEM); \
765
    priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
766
    if (!unit->content_ref) \
767
        memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
768
    return 0; \
769
}
770
771


80
cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
772


2364
cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
773


96
cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
774


100
cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
775


550
cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
776
777
6616
static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
778
                                  CodedBitstreamUnit *unit)
779
{
780
    GetBitContext gbc;
781
    int err;
782
783
6616
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
784
6616
    if (err < 0)
785
        return err;
786
787


6616
    switch (unit->type) {
788
40
    case H264_NAL_SPS:
789
        {
790
            H264RawSPS *sps;
791
792
40
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
793
40
            if (err < 0)
794
                return err;
795
40
            sps = unit->content;
796
797
40
            err = cbs_h264_read_sps(ctx, &gbc, sps);
798
40
            if (err < 0)
799
                return err;
800
801
40
            err = cbs_h264_replace_sps(ctx, unit);
802
40
            if (err < 0)
803
                return err;
804
        }
805
40
        break;
806
807
    case H264_NAL_SPS_EXT:
808
        {
809
            err = ff_cbs_alloc_unit_content(ctx, unit,
810
                                            sizeof(H264RawSPSExtension),
811
                                            NULL);
812
            if (err < 0)
813
                return err;
814
815
            err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
816
            if (err < 0)
817
                return err;
818
        }
819
        break;
820
821
1182
    case H264_NAL_PPS:
822
        {
823
            H264RawPPS *pps;
824
825
1182
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
826
                                            &cbs_h264_free_pps);
827
1182
            if (err < 0)
828
                return err;
829
1182
            pps = unit->content;
830
831
1182
            err = cbs_h264_read_pps(ctx, &gbc, pps);
832
1182
            if (err < 0)
833
                return err;
834
835
1182
            err = cbs_h264_replace_pps(ctx, unit);
836
1182
            if (err < 0)
837
                return err;
838
        }
839
1182
        break;
840
841
4913
    case H264_NAL_SLICE:
842
    case H264_NAL_IDR_SLICE:
843
    case H264_NAL_AUXILIARY_SLICE:
844
        {
845
            H264RawSlice *slice;
846
            int pos, len;
847
848
4913
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
849
                                            &cbs_h264_free_slice);
850
4913
            if (err < 0)
851
                return err;
852
4913
            slice = unit->content;
853
854
4913
            err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
855
4913
            if (err < 0)
856
                return err;
857
858
4913
            pos = get_bits_count(&gbc);
859
4913
            len = unit->data_size;
860
4913
            if (!unit->data[len - 1]) {
861
                int z;
862
                for (z = 0; z < len && !unit->data[len - z - 1]; z++);
863
                av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
864
                       "from slice data.\n", z);
865
                len -= z;
866
            }
867
868
4913
            slice->data_size = len - pos / 8;
869
4913
            slice->data_ref  = av_buffer_ref(unit->data_ref);
870
4913
            if (!slice->data_ref)
871
                return AVERROR(ENOMEM);
872
4913
            slice->data = unit->data + pos / 8;
873
4913
            slice->data_bit_start = pos % 8;
874
        }
875
4913
        break;
876
877
195
    case H264_NAL_AUD:
878
        {
879
195
            err = ff_cbs_alloc_unit_content(ctx, unit,
880
                                            sizeof(H264RawAUD), NULL);
881
195
            if (err < 0)
882
                return err;
883
884
195
            err = cbs_h264_read_aud(ctx, &gbc, unit->content);
885
195
            if (err < 0)
886
                return err;
887
        }
888
195
        break;
889
890
283
    case H264_NAL_SEI:
891
        {
892
283
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
893
                                            &cbs_h264_free_sei);
894
283
            if (err < 0)
895
                return err;
896
897
283
            err = cbs_h264_read_sei(ctx, &gbc, unit->content);
898
283
            if (err < 0)
899
                return err;
900
        }
901
283
        break;
902
903
    case H264_NAL_FILLER_DATA:
904
        {
905
            err = ff_cbs_alloc_unit_content(ctx, unit,
906
                                            sizeof(H264RawFiller), NULL);
907
            if (err < 0)
908
                return err;
909
910
            err = cbs_h264_read_filler(ctx, &gbc, unit->content);
911
            if (err < 0)
912
                return err;
913
        }
914
        break;
915
916
3
    case H264_NAL_END_SEQUENCE:
917
    case H264_NAL_END_STREAM:
918
        {
919
3
            err = ff_cbs_alloc_unit_content(ctx, unit,
920
                                            sizeof(H264RawNALUnitHeader),
921
                                            NULL);
922
3
            if (err < 0)
923
                return err;
924
925
3
            err = (unit->type == H264_NAL_END_SEQUENCE ?
926
3
                   cbs_h264_read_end_of_sequence :
927
3
                   cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
928
3
            if (err < 0)
929
                return err;
930
        }
931
3
        break;
932
933
    default:
934
        return AVERROR(ENOSYS);
935
    }
936
937
6616
    return 0;
938
}
939
940
7832
static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
941
                                  CodedBitstreamUnit *unit)
942
{
943
    GetBitContext gbc;
944
    int err;
945
946
7832
    err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
947
7832
    if (err < 0)
948
        return err;
949
950

7832
    switch (unit->type) {
951
48
    case HEVC_NAL_VPS:
952
        {
953
            H265RawVPS *vps;
954
955
48
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
956
                                            &cbs_h265_free_vps);
957
48
            if (err < 0)
958
                return err;
959
48
            vps = unit->content;
960
961
48
            err = cbs_h265_read_vps(ctx, &gbc, vps);
962
48
            if (err < 0)
963
                return err;
964
965
48
            err = cbs_h265_replace_vps(ctx, unit);
966
48
            if (err < 0)
967
                return err;
968
        }
969
48
        break;
970
50
    case HEVC_NAL_SPS:
971
        {
972
            H265RawSPS *sps;
973
974
50
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
975
                                            &cbs_h265_free_sps);
976
50
            if (err < 0)
977
                return err;
978
50
            sps = unit->content;
979
980
50
            err = cbs_h265_read_sps(ctx, &gbc, sps);
981
50
            if (err < 0)
982
                return err;
983
984
50
            err = cbs_h265_replace_sps(ctx, unit);
985
50
            if (err < 0)
986
                return err;
987
        }
988
50
        break;
989
990
275
    case HEVC_NAL_PPS:
991
        {
992
            H265RawPPS *pps;
993
994
275
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
995
                                            &cbs_h265_free_pps);
996
275
            if (err < 0)
997
                return err;
998
275
            pps = unit->content;
999
1000
275
            err = cbs_h265_read_pps(ctx, &gbc, pps);
1001
275
            if (err < 0)
1002
                return err;
1003
1004
275
            err = cbs_h265_replace_pps(ctx, unit);
1005
275
            if (err < 0)
1006
                return err;
1007
        }
1008
275
        break;
1009
1010
5864
    case HEVC_NAL_TRAIL_N:
1011
    case HEVC_NAL_TRAIL_R:
1012
    case HEVC_NAL_TSA_N:
1013
    case HEVC_NAL_TSA_R:
1014
    case HEVC_NAL_STSA_N:
1015
    case HEVC_NAL_STSA_R:
1016
    case HEVC_NAL_RADL_N:
1017
    case HEVC_NAL_RADL_R:
1018
    case HEVC_NAL_RASL_N:
1019
    case HEVC_NAL_RASL_R:
1020
    case HEVC_NAL_BLA_W_LP:
1021
    case HEVC_NAL_BLA_W_RADL:
1022
    case HEVC_NAL_BLA_N_LP:
1023
    case HEVC_NAL_IDR_W_RADL:
1024
    case HEVC_NAL_IDR_N_LP:
1025
    case HEVC_NAL_CRA_NUT:
1026
        {
1027
            H265RawSlice *slice;
1028
            int pos, len;
1029
1030
5864
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
1031
                                            &cbs_h265_free_slice);
1032
5864
            if (err < 0)
1033
                return err;
1034
5864
            slice = unit->content;
1035
1036
5864
            err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
1037
5864
            if (err < 0)
1038
                return err;
1039
1040
5864
            pos = get_bits_count(&gbc);
1041
5864
            len = unit->data_size;
1042
5864
            if (!unit->data[len - 1]) {
1043
                int z;
1044
                for (z = 0; z < len && !unit->data[len - z - 1]; z++);
1045
                av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
1046
                       "from slice data.\n", z);
1047
                len -= z;
1048
            }
1049
1050
5864
            slice->data_size = len - pos / 8;
1051
5864
            slice->data_ref  = av_buffer_ref(unit->data_ref);
1052
5864
            if (!slice->data_ref)
1053
                return AVERROR(ENOMEM);
1054
5864
            slice->data = unit->data + pos / 8;
1055
5864
            slice->data_bit_start = pos % 8;
1056
        }
1057
5864
        break;
1058
1059
60
    case HEVC_NAL_AUD:
1060
        {
1061
60
            err = ff_cbs_alloc_unit_content(ctx, unit,
1062
                                            sizeof(H265RawAUD), NULL);
1063
60
            if (err < 0)
1064
                return err;
1065
1066
60
            err = cbs_h265_read_aud(ctx, &gbc, unit->content);
1067
60
            if (err < 0)
1068
                return err;
1069
        }
1070
60
        break;
1071
1072
1535
    case HEVC_NAL_SEI_PREFIX:
1073
    case HEVC_NAL_SEI_SUFFIX:
1074
        {
1075
1535
            err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
1076
                                            &cbs_h265_free_sei);
1077
1078
1535
            if (err < 0)
1079
                return err;
1080
1081
1535
            err = cbs_h265_read_sei(ctx, &gbc, unit->content,
1082
1535
                                    unit->type == HEVC_NAL_SEI_PREFIX);
1083
1084
1535
            if (err < 0)
1085
                return err;
1086
        }
1087
1535
        break;
1088
1089
    default:
1090
        return AVERROR(ENOSYS);
1091
    }
1092
1093
7832
    return 0;
1094
}
1095
1096
10777
static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
1097
                                      PutBitContext *pbc, const uint8_t *data,
1098
                                      size_t data_size, int data_bit_start)
1099
{
1100
10777
    size_t rest  = data_size - (data_bit_start + 7) / 8;
1101
10777
    const uint8_t *pos = data + data_bit_start / 8;
1102
1103

10777
    av_assert0(data_bit_start >= 0 &&
1104
               data_size > data_bit_start / 8);
1105
1106
10777
    if (data_size * 8 + 8 > put_bits_left(pbc))
1107
        return AVERROR(ENOSPC);
1108
1109
10777
    if (!rest)
1110
1
        goto rbsp_stop_one_bit;
1111
1112
    // First copy the remaining bits of the first byte
1113
    // The above check ensures that we do not accidentally
1114
    // copy beyond the rbsp_stop_one_bit.
1115
10776
    if (data_bit_start % 8)
1116
3547
        put_bits(pbc, 8 - data_bit_start % 8,
1117
3547
                 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
1118
1119
10776
    if (put_bits_count(pbc) % 8 == 0) {
1120
        // If the writer is aligned at this point,
1121
        // memcpy can be used to improve performance.
1122
        // This happens normally for CABAC.
1123
10776
        flush_put_bits(pbc);
1124
10776
        memcpy(put_bits_ptr(pbc), pos, rest);
1125
10776
        skip_put_bytes(pbc, rest);
1126
    } else {
1127
        // If not, we have to copy manually.
1128
        // rbsp_stop_one_bit forces us to special-case
1129
        // the last byte.
1130
        uint8_t temp;
1131
        int i;
1132
1133
        for (; rest > 4; rest -= 4, pos += 4)
1134
            put_bits32(pbc, AV_RB32(pos));
1135
1136
        for (; rest > 1; rest--, pos++)
1137
            put_bits(pbc, 8, *pos);
1138
1139
    rbsp_stop_one_bit:
1140
1
        temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
1141
1142
1
        av_assert0(temp);
1143
1
        i = ff_ctz(*pos);
1144
1
        temp = temp >> i;
1145
1
        i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
1146
1
        put_bits(pbc, i, temp);
1147
1
        if (put_bits_count(pbc) % 8)
1148
            put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
1149
    }
1150
1151
10777
    return 0;
1152
}
1153
1154
6616
static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
1155
                                   CodedBitstreamUnit *unit,
1156
                                   PutBitContext *pbc)
1157
{
1158
    int err;
1159
1160


6616
    switch (unit->type) {
1161
40
    case H264_NAL_SPS:
1162
        {
1163
40
            H264RawSPS *sps = unit->content;
1164
1165
40
            err = cbs_h264_write_sps(ctx, pbc, sps);
1166
40
            if (err < 0)
1167
                return err;
1168
1169
40
            err = cbs_h264_replace_sps(ctx, unit);
1170
40
            if (err < 0)
1171
                return err;
1172
        }
1173
40
        break;
1174
1175
    case H264_NAL_SPS_EXT:
1176
        {
1177
            H264RawSPSExtension *sps_ext = unit->content;
1178
1179
            err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1180
            if (err < 0)
1181
                return err;
1182
        }
1183
        break;
1184
1185
1182
    case H264_NAL_PPS:
1186
        {
1187
1182
            H264RawPPS *pps = unit->content;
1188
1189
1182
            err = cbs_h264_write_pps(ctx, pbc, pps);
1190
1182
            if (err < 0)
1191
                return err;
1192
1193
1182
            err = cbs_h264_replace_pps(ctx, unit);
1194
1182
            if (err < 0)
1195
                return err;
1196
        }
1197
1182
        break;
1198
1199
4913
    case H264_NAL_SLICE:
1200
    case H264_NAL_IDR_SLICE:
1201
    case H264_NAL_AUXILIARY_SLICE:
1202
        {
1203
4913
            H264RawSlice *slice = unit->content;
1204
1205
4913
            err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1206
4913
            if (err < 0)
1207
                return err;
1208
1209
4913
            if (slice->data) {
1210
4913
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1211
                                                 slice->data_size,
1212
                                                 slice->data_bit_start);
1213
4913
                if (err < 0)
1214
                    return err;
1215
            } else {
1216
                // No slice data - that was just the header.
1217
                // (Bitstream may be unaligned!)
1218
            }
1219
        }
1220
4913
        break;
1221
1222
195
    case H264_NAL_AUD:
1223
        {
1224
195
            err = cbs_h264_write_aud(ctx, pbc, unit->content);
1225
195
            if (err < 0)
1226
                return err;
1227
        }
1228
195
        break;
1229
1230
283
    case H264_NAL_SEI:
1231
        {
1232
283
            err = cbs_h264_write_sei(ctx, pbc, unit->content);
1233
283
            if (err < 0)
1234
                return err;
1235
        }
1236
283
        break;
1237
1238
    case H264_NAL_FILLER_DATA:
1239
        {
1240
            err = cbs_h264_write_filler(ctx, pbc, unit->content);
1241
            if (err < 0)
1242
                return err;
1243
        }
1244
        break;
1245
1246
1
    case H264_NAL_END_SEQUENCE:
1247
        {
1248
1
            err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1249
1
            if (err < 0)
1250
                return err;
1251
        }
1252
1
        break;
1253
1254
2
    case H264_NAL_END_STREAM:
1255
        {
1256
2
            err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1257
2
            if (err < 0)
1258
                return err;
1259
        }
1260
2
        break;
1261
1262
    default:
1263
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1264
               "NAL unit type %"PRIu32".\n", unit->type);
1265
        return AVERROR_PATCHWELCOME;
1266
    }
1267
1268
6616
    return 0;
1269
}
1270
1271
7832
static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1272
                                   CodedBitstreamUnit *unit,
1273
                                   PutBitContext *pbc)
1274
{
1275
    int err;
1276
1277

7832
    switch (unit->type) {
1278
48
    case HEVC_NAL_VPS:
1279
        {
1280
48
            H265RawVPS *vps = unit->content;
1281
1282
48
            err = cbs_h265_write_vps(ctx, pbc, vps);
1283
48
            if (err < 0)
1284
                return err;
1285
1286
48
            err = cbs_h265_replace_vps(ctx, unit);
1287
48
            if (err < 0)
1288
                return err;
1289
        }
1290
48
        break;
1291
1292
50
    case HEVC_NAL_SPS:
1293
        {
1294
50
            H265RawSPS *sps = unit->content;
1295
1296
50
            err = cbs_h265_write_sps(ctx, pbc, sps);
1297
50
            if (err < 0)
1298
                return err;
1299
1300
50
            err = cbs_h265_replace_sps(ctx, unit);
1301
50
            if (err < 0)
1302
                return err;
1303
        }
1304
50
        break;
1305
1306
275
    case HEVC_NAL_PPS:
1307
        {
1308
275
            H265RawPPS *pps = unit->content;
1309
1310
275
            err = cbs_h265_write_pps(ctx, pbc, pps);
1311
275
            if (err < 0)
1312
                return err;
1313
1314
275
            err = cbs_h265_replace_pps(ctx, unit);
1315
275
            if (err < 0)
1316
                return err;
1317
        }
1318
275
        break;
1319
1320
5864
    case HEVC_NAL_TRAIL_N:
1321
    case HEVC_NAL_TRAIL_R:
1322
    case HEVC_NAL_TSA_N:
1323
    case HEVC_NAL_TSA_R:
1324
    case HEVC_NAL_STSA_N:
1325
    case HEVC_NAL_STSA_R:
1326
    case HEVC_NAL_RADL_N:
1327
    case HEVC_NAL_RADL_R:
1328
    case HEVC_NAL_RASL_N:
1329
    case HEVC_NAL_RASL_R:
1330
    case HEVC_NAL_BLA_W_LP:
1331
    case HEVC_NAL_BLA_W_RADL:
1332
    case HEVC_NAL_BLA_N_LP:
1333
    case HEVC_NAL_IDR_W_RADL:
1334
    case HEVC_NAL_IDR_N_LP:
1335
    case HEVC_NAL_CRA_NUT:
1336
        {
1337
5864
            H265RawSlice *slice = unit->content;
1338
1339
5864
            err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1340
5864
            if (err < 0)
1341
                return err;
1342
1343
5864
            if (slice->data) {
1344
5864
                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1345
                                                 slice->data_size,
1346
                                                 slice->data_bit_start);
1347
5864
                if (err < 0)
1348
                    return err;
1349
            } else {
1350
                // No slice data - that was just the header.
1351
            }
1352
        }
1353
5864
        break;
1354
1355
60
    case HEVC_NAL_AUD:
1356
        {
1357
60
            err = cbs_h265_write_aud(ctx, pbc, unit->content);
1358
60
            if (err < 0)
1359
                return err;
1360
        }
1361
60
        break;
1362
1363
1535
    case HEVC_NAL_SEI_PREFIX:
1364
    case HEVC_NAL_SEI_SUFFIX:
1365
        {
1366
1535
            err = cbs_h265_write_sei(ctx, pbc, unit->content,
1367
1535
                                     unit->type == HEVC_NAL_SEI_PREFIX);
1368
1369
1535
            if (err < 0)
1370
                return err;
1371
        }
1372
1535
        break;
1373
1374
    default:
1375
        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1376
               "NAL unit type %"PRIu32".\n", unit->type);
1377
        return AVERROR_PATCHWELCOME;
1378
    }
1379
1380
7832
    return 0;
1381
}
1382
1383
4502
static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1384
                                       CodedBitstreamFragment *frag)
1385
{
1386
    uint8_t *data;
1387
    size_t max_size, dp, sp;
1388
    int err, i, zero_run;
1389
1390
18950
    for (i = 0; i < frag->nb_units; i++) {
1391
        // Data should already all have been written when we get here.
1392
14448
        av_assert0(frag->units[i].data);
1393
    }
1394
1395
4502
    max_size = 0;
1396
18950
    for (i = 0; i < frag->nb_units; i++) {
1397
        // Start code + content with worst-case emulation prevention.
1398
14448
        max_size += 3 + frag->units[i].data_size * 3 / 2;
1399
    }
1400
1401
4502
    data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1402
4502
    if (!data)
1403
        return AVERROR(ENOMEM);
1404
1405
4502
    dp = 0;
1406
18950
    for (i = 0; i < frag->nb_units; i++) {
1407
14448
        CodedBitstreamUnit *unit = &frag->units[i];
1408
1409
14448
        if (unit->data_bit_padding > 0) {
1410
            if (i < frag->nb_units - 1)
1411
                av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1412
                       "unaligned padding on non-final NAL unit.\n");
1413
            else
1414
                frag->data_bit_padding = unit->data_bit_padding;
1415
        }
1416
1417
14448
        if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1418
6616
             (unit->type == H264_NAL_SPS ||
1419
6576
              unit->type == H264_NAL_PPS)) ||
1420
13226
            (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1421
7832
             (unit->type == HEVC_NAL_VPS ||
1422
7784
              unit->type == HEVC_NAL_SPS ||
1423

13128
              unit->type == HEVC_NAL_PPS)) ||
1424
            i == 0 /* (Assume this is the start of an access unit.) */) {
1425
            // zero_byte
1426
5026
            data[dp++] = 0;
1427
        }
1428
        // start_code_prefix_one_3bytes
1429
14448
        data[dp++] = 0;
1430
14448
        data[dp++] = 0;
1431
14448
        data[dp++] = 1;
1432
1433
14448
        zero_run = 0;
1434
10695035
        for (sp = 0; sp < unit->data_size; sp++) {
1435
10680587
            if (zero_run < 2) {
1436
10676594
                if (unit->data[sp] == 0)
1437
106112
                    ++zero_run;
1438
                else
1439
10570482
                    zero_run = 0;
1440
            } else {
1441
3993
                if ((unit->data[sp] & ~3) == 0) {
1442
                    // emulation_prevention_three_byte
1443
748
                    data[dp++] = 3;
1444
                }
1445
3993
                zero_run = unit->data[sp] == 0;
1446
            }
1447
10680587
            data[dp++] = unit->data[sp];
1448
        }
1449
    }
1450
1451
4502
    av_assert0(dp <= max_size);
1452
4502
    err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1453
4502
    if (err)
1454
        return err;
1455
4502
    memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1456
1457
4502
    frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1458
                                      NULL, NULL, 0);
1459
4502
    if (!frag->data_ref) {
1460
        av_freep(&data);
1461
        return AVERROR(ENOMEM);
1462
    }
1463
1464
4502
    frag->data = data;
1465
4502
    frag->data_size = dp;
1466
1467
4502
    return 0;
1468
}
1469
1470
15
static void cbs_h264_close(CodedBitstreamContext *ctx)
1471
{
1472
15
    CodedBitstreamH264Context *h264 = ctx->priv_data;
1473
    int i;
1474
1475
15
    ff_h2645_packet_uninit(&h264->common.read_packet);
1476
1477
495
    for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1478
480
        av_buffer_unref(&h264->sps_ref[i]);
1479
3855
    for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1480
3840
        av_buffer_unref(&h264->pps_ref[i]);
1481
15
}
1482
1483
20
static void cbs_h265_close(CodedBitstreamContext *ctx)
1484
{
1485
20
    CodedBitstreamH265Context *h265 = ctx->priv_data;
1486
    int i;
1487
1488
20
    ff_h2645_packet_uninit(&h265->common.read_packet);
1489
1490
340
    for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1491
320
        av_buffer_unref(&h265->vps_ref[i]);
1492
340
    for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1493
320
        av_buffer_unref(&h265->sps_ref[i]);
1494
1300
    for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1495
1280
        av_buffer_unref(&h265->pps_ref[i]);
1496
20
}
1497
1498
const CodedBitstreamType ff_cbs_type_h264 = {
1499
    .codec_id          = AV_CODEC_ID_H264,
1500
1501
    .priv_data_size    = sizeof(CodedBitstreamH264Context),
1502
1503
    .split_fragment    = &cbs_h2645_split_fragment,
1504
    .read_unit         = &cbs_h264_read_nal_unit,
1505
    .write_unit        = &cbs_h264_write_nal_unit,
1506
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1507
1508
    .close             = &cbs_h264_close,
1509
};
1510
1511
const CodedBitstreamType ff_cbs_type_h265 = {
1512
    .codec_id          = AV_CODEC_ID_HEVC,
1513
1514
    .priv_data_size    = sizeof(CodedBitstreamH265Context),
1515
1516
    .split_fragment    = &cbs_h2645_split_fragment,
1517
    .read_unit         = &cbs_h265_read_nal_unit,
1518
    .write_unit        = &cbs_h265_write_nal_unit,
1519
    .assemble_fragment = &cbs_h2645_assemble_fragment,
1520
1521
    .close             = &cbs_h265_close,
1522
};
1523
1524
int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
1525
                                CodedBitstreamFragment *au,
1526
                                H264RawSEIPayload *payload)
1527
{
1528
    H264RawSEI *sei = NULL;
1529
    int err, i;
1530
1531
    // Find an existing SEI NAL unit to add to.
1532
    for (i = 0; i < au->nb_units; i++) {
1533
        if (au->units[i].type == H264_NAL_SEI) {
1534
            sei = au->units[i].content;
1535
            if (sei->payload_count < H264_MAX_SEI_PAYLOADS)
1536
                break;
1537
1538
            sei = NULL;
1539
        }
1540
    }
1541
1542
    if (!sei) {
1543
        // Need to make a new SEI NAL unit.  Insert it before the first
1544
        // slice data NAL unit; if no slice data, add at the end.
1545
        AVBufferRef *sei_ref;
1546
1547
        sei = av_mallocz(sizeof(*sei));
1548
        if (!sei) {
1549
            err = AVERROR(ENOMEM);
1550
            goto fail;
1551
        }
1552
1553
        sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1554
        sei->nal_unit_header.nal_ref_idc   = 0;
1555
1556
        sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1557
                                   &cbs_h264_free_sei, NULL, 0);
1558
        if (!sei_ref) {
1559
            av_freep(&sei);
1560
            err = AVERROR(ENOMEM);
1561
            goto fail;
1562
        }
1563
1564
        for (i = 0; i < au->nb_units; i++) {
1565
            if (au->units[i].type == H264_NAL_SLICE ||
1566
                au->units[i].type == H264_NAL_IDR_SLICE)
1567
                break;
1568
        }
1569
1570
        err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
1571
                                         sei, sei_ref);
1572
        av_buffer_unref(&sei_ref);
1573
        if (err < 0)
1574
            goto fail;
1575
    }
1576
1577
    memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1578
    ++sei->payload_count;
1579
1580
    return 0;
1581
fail:
1582
    cbs_h264_free_sei_payload(payload);
1583
    return err;
1584
}
1585
1586
void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
1587
                                    CodedBitstreamFragment *au,
1588
                                    CodedBitstreamUnit *nal,
1589
                                    int position)
1590
{
1591
    H264RawSEI *sei = nal->content;
1592
1593
    av_assert0(nal->type == H264_NAL_SEI);
1594
    av_assert0(position >= 0 && position < sei->payload_count);
1595
1596
    if (position == 0 && sei->payload_count == 1) {
1597
        // Deleting NAL unit entirely.
1598
        int i;
1599
1600
        for (i = 0; i < au->nb_units; i++) {
1601
            if (&au->units[i] == nal)
1602
                break;
1603
        }
1604
1605
        ff_cbs_delete_unit(ctx, au, i);
1606
    } else {
1607
        cbs_h264_free_sei_payload(&sei->payload[position]);
1608
1609
        --sei->payload_count;
1610
        memmove(sei->payload + position,
1611
                sei->payload + position + 1,
1612
                (sei->payload_count - position) * sizeof(*sei->payload));
1613
    }
1614
}