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
cbs_read_ue_golomb(CodedBitstreamContext * ctx,GetBitContext * gbc,const char * name,const int * subscripts,uint32_t * write_to,uint32_t range_min,uint32_t range_max)34 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 position = get_bits_count(gbc);
45
46 for (i = 0; i < 32; i++) {
47 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 k = get_bits1(gbc);
53 bits[i] = k ? '1' : '0';
54 if (k)
55 break;
56 }
57 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 value = 1;
63 for (j = 0; j < i; j++) {
64 k = get_bits1(gbc);
65 bits[i + j + 1] = k ? '1' : '0';
66 value = value << 1 | k;
67 }
68 bits[i + j + 1] = 0;
69 --value;
70
71 if (ctx->trace_enable)
72 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
73 bits, value);
74
75 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 *write_to = value;
83 return 0;
84 }
85
cbs_read_se_golomb(CodedBitstreamContext * ctx,GetBitContext * gbc,const char * name,const int * subscripts,int32_t * write_to,int32_t range_min,int32_t range_max)86 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 position = get_bits_count(gbc);
98
99 for (i = 0; i < 32; i++) {
100 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 k = get_bits1(gbc);
106 bits[i] = k ? '1' : '0';
107 if (k)
108 break;
109 }
110 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 v = 1;
116 for (j = 0; j < i; j++) {
117 k = get_bits1(gbc);
118 bits[i + j + 1] = k ? '1' : '0';
119 v = v << 1 | k;
120 }
121 bits[i + j + 1] = 0;
122 if (v & 1)
123 value = -(int32_t)(v / 2);
124 else
125 value = v / 2;
126
127 if (ctx->trace_enable)
128 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
129 bits, value);
130
131 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 *write_to = value;
139 return 0;
140 }
141
cbs_write_ue_golomb(CodedBitstreamContext * ctx,PutBitContext * pbc,const char * name,const int * subscripts,uint32_t value,uint32_t range_min,uint32_t range_max)142 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 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 av_assert0(value != UINT32_MAX);
156
157 len = av_log2(value + 1);
158 if (put_bits_left(pbc) < 2 * len + 1)
159 return AVERROR(ENOSPC);
160
161 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 put_bits(pbc, len, 0);
177 if (len + 1 < 32)
178 put_bits(pbc, len + 1, value + 1);
179 else
180 put_bits32(pbc, value + 1);
181
182 return 0;
183 }
184
cbs_write_se_golomb(CodedBitstreamContext * ctx,PutBitContext * pbc,const char * name,const int * subscripts,int32_t value,int32_t range_min,int32_t range_max)185 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 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 av_assert0(value != INT32_MIN);
200
201 if (value == 0)
202 uvalue = 0;
203 else if (value > 0)
204 uvalue = 2 * (uint32_t)value - 1;
205 else
206 uvalue = 2 * (uint32_t)-value;
207
208 len = av_log2(uvalue + 1);
209 if (put_bits_left(pbc) < 2 * len + 1)
210 return AVERROR(ENOSPC);
211
212 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 put_bits(pbc, len, 0);
228 if (len + 1 < 32)
229 put_bits(pbc, len + 1, uvalue + 1);
230 else
231 put_bits32(pbc, uvalue + 1);
232
233 return 0;
234 }
235
236 // payload_extension_present() - true if we are before the last 1-bit
237 // in the payload structure, which must be in the last byte.
cbs_h265_payload_extension_present(GetBitContext * gbc,uint32_t payload_size,int cur_pos)238 static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t payload_size,
239 int cur_pos)
240 {
241 int bits_left = payload_size * 8 - cur_pos;
242 return (bits_left > 0 &&
243 (bits_left > 7 || show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)));
244 }
245
246 #define HEADER(name) do { \
247 ff_cbs_trace_header(ctx, name); \
248 } while (0)
249
250 #define CHECK(call) do { \
251 err = (call); \
252 if (err < 0) \
253 return err; \
254 } while (0)
255
256 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
257 #define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
258 #define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name)
259
260 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
261
262 #define u(width, name, range_min, range_max) \
263 xu(width, name, current->name, range_min, range_max, 0, )
264 #define ub(width, name) \
265 xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0, )
266 #define flag(name) ub(1, name)
267 #define ue(name, range_min, range_max) \
268 xue(name, current->name, range_min, range_max, 0, )
269 #define i(width, name, range_min, range_max) \
270 xi(width, name, current->name, range_min, range_max, 0, )
271 #define ib(width, name) \
272 xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0, )
273 #define se(name, range_min, range_max) \
274 xse(name, current->name, range_min, range_max, 0, )
275
276 #define us(width, name, range_min, range_max, subs, ...) \
277 xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
278 #define ubs(width, name, subs, ...) \
279 xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
280 #define flags(name, subs, ...) \
281 xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
282 #define ues(name, range_min, range_max, subs, ...) \
283 xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
284 #define is(width, name, range_min, range_max, subs, ...) \
285 xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
286 #define ibs(width, name, subs, ...) \
287 xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
288 #define ses(name, range_min, range_max, subs, ...) \
289 xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
290
291 #define fixed(width, name, value) do { \
292 av_unused uint32_t fixed_value = value; \
293 xu(width, name, fixed_value, value, value, 0, ); \
294 } while (0)
295
296
297 #define READ
298 #define READWRITE read
299 #define RWContext GetBitContext
300
301 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
302 uint32_t value; \
303 CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
304 SUBSCRIPTS(subs, __VA_ARGS__), \
305 &value, range_min, range_max)); \
306 var = value; \
307 } while (0)
308 #define xue(name, var, range_min, range_max, subs, ...) do { \
309 uint32_t value; \
310 CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
311 SUBSCRIPTS(subs, __VA_ARGS__), \
312 &value, range_min, range_max)); \
313 var = value; \
314 } while (0)
315 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
316 int32_t value; \
317 CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
318 SUBSCRIPTS(subs, __VA_ARGS__), \
319 &value, range_min, range_max)); \
320 var = value; \
321 } while (0)
322 #define xse(name, var, range_min, range_max, subs, ...) do { \
323 int32_t value; \
324 CHECK(cbs_read_se_golomb(ctx, rw, #name, \
325 SUBSCRIPTS(subs, __VA_ARGS__), \
326 &value, range_min, range_max)); \
327 var = value; \
328 } while (0)
329
330
331 #define infer(name, value) do { \
332 current->name = value; \
333 } while (0)
334
cbs_h2645_read_more_rbsp_data(GetBitContext * gbc)335 static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
336 {
337 int bits_left = get_bits_left(gbc);
338 if (bits_left > 8)
339 return 1;
340 if (bits_left == 0)
341 return 0;
342 if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
343 return 1;
344 return 0;
345 }
346
347 #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
348
349 #define byte_alignment(rw) (get_bits_count(rw) % 8)
350
351 #define allocate(name, size) do { \
352 name ## _ref = av_buffer_allocz(size + \
353 AV_INPUT_BUFFER_PADDING_SIZE); \
354 if (!name ## _ref) \
355 return AVERROR(ENOMEM); \
356 name = name ## _ref->data; \
357 } while (0)
358
359 #define FUNC(name) FUNC_H264(READWRITE, name)
360 #include "cbs_h264_syntax_template.c"
361 #undef FUNC
362
363 #define FUNC(name) FUNC_H265(READWRITE, name)
364 #include "cbs_h265_syntax_template.c"
365 #undef FUNC
366
367 #undef READ
368 #undef READWRITE
369 #undef RWContext
370 #undef xu
371 #undef xi
372 #undef xue
373 #undef xse
374 #undef infer
375 #undef more_rbsp_data
376 #undef byte_alignment
377 #undef allocate
378
379
380 #define WRITE
381 #define READWRITE write
382 #define RWContext PutBitContext
383
384 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
385 uint32_t value = var; \
386 CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
387 SUBSCRIPTS(subs, __VA_ARGS__), \
388 value, range_min, range_max)); \
389 } while (0)
390 #define xue(name, var, range_min, range_max, subs, ...) do { \
391 uint32_t value = var; \
392 CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
393 SUBSCRIPTS(subs, __VA_ARGS__), \
394 value, range_min, range_max)); \
395 } while (0)
396 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
397 int32_t value = var; \
398 CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
399 SUBSCRIPTS(subs, __VA_ARGS__), \
400 value, range_min, range_max)); \
401 } while (0)
402 #define xse(name, var, range_min, range_max, subs, ...) do { \
403 int32_t value = var; \
404 CHECK(cbs_write_se_golomb(ctx, rw, #name, \
405 SUBSCRIPTS(subs, __VA_ARGS__), \
406 value, range_min, range_max)); \
407 } while (0)
408
409 #define infer(name, value) do { \
410 if (current->name != (value)) { \
411 av_log(ctx->log_ctx, AV_LOG_ERROR, \
412 "%s does not match inferred value: " \
413 "%"PRId64", but should be %"PRId64".\n", \
414 #name, (int64_t)current->name, (int64_t)(value)); \
415 return AVERROR_INVALIDDATA; \
416 } \
417 } while (0)
418
419 #define more_rbsp_data(var) (var)
420
421 #define byte_alignment(rw) (put_bits_count(rw) % 8)
422
423 #define allocate(name, size) do { \
424 if (!name) { \
425 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
426 "for writing.\n", #name); \
427 return AVERROR_INVALIDDATA; \
428 } \
429 } while (0)
430
431 #define FUNC(name) FUNC_H264(READWRITE, name)
432 #include "cbs_h264_syntax_template.c"
433 #undef FUNC
434
435 #define FUNC(name) FUNC_H265(READWRITE, name)
436 #include "cbs_h265_syntax_template.c"
437 #undef FUNC
438
439 #undef WRITE
440 #undef READWRITE
441 #undef RWContext
442 #undef xu
443 #undef xi
444 #undef xue
445 #undef xse
446 #undef u
447 #undef i
448 #undef flag
449 #undef ue
450 #undef se
451 #undef infer
452 #undef more_rbsp_data
453 #undef byte_alignment
454 #undef allocate
455
456
cbs_h2645_fragment_add_nals(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag,const H2645Packet * packet)457 static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
458 CodedBitstreamFragment *frag,
459 const H2645Packet *packet)
460 {
461 int err, i;
462
463 for (i = 0; i < packet->nb_nals; i++) {
464 const H2645NAL *nal = &packet->nals[i];
465 AVBufferRef *ref;
466 size_t size = nal->size;
467
468 if (nal->nuh_layer_id > 0)
469 continue;
470
471 // Remove trailing zeroes.
472 while (size > 0 && nal->data[size - 1] == 0)
473 --size;
474 if (size == 0) {
475 av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
476 continue;
477 }
478
479 ref = (nal->data == nal->raw_data) ? frag->data_ref
480 : packet->rbsp.rbsp_buffer_ref;
481
482 err = ff_cbs_insert_unit_data(frag, -1, nal->type,
483 (uint8_t*)nal->data, size, ref);
484 if (err < 0)
485 return err;
486 }
487
488 return 0;
489 }
490
cbs_h2645_split_fragment(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag,int header)491 static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
492 CodedBitstreamFragment *frag,
493 int header)
494 {
495 enum AVCodecID codec_id = ctx->codec->codec_id;
496 CodedBitstreamH2645Context *priv = ctx->priv_data;
497 GetByteContext gbc;
498 int err;
499
500 av_assert0(frag->data && frag->nb_units == 0);
501 if (frag->data_size == 0)
502 return 0;
503
504 if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
505 // AVCC header.
506 size_t size, start, end;
507 int i, count, version;
508
509 priv->mp4 = 1;
510
511 bytestream2_init(&gbc, frag->data, frag->data_size);
512
513 if (bytestream2_get_bytes_left(&gbc) < 6)
514 return AVERROR_INVALIDDATA;
515
516 version = bytestream2_get_byte(&gbc);
517 if (version != 1) {
518 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
519 "first byte %u.\n", version);
520 return AVERROR_INVALIDDATA;
521 }
522
523 bytestream2_skip(&gbc, 3);
524 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
525
526 // SPS array.
527 count = bytestream2_get_byte(&gbc) & 0x1f;
528 start = bytestream2_tell(&gbc);
529 for (i = 0; i < count; i++) {
530 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
531 return AVERROR_INVALIDDATA;
532 size = bytestream2_get_be16(&gbc);
533 if (bytestream2_get_bytes_left(&gbc) < size)
534 return AVERROR_INVALIDDATA;
535 bytestream2_skip(&gbc, size);
536 }
537 end = bytestream2_tell(&gbc);
538
539 err = ff_h2645_packet_split(&priv->read_packet,
540 frag->data + start, end - start,
541 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
542 if (err < 0) {
543 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
544 return err;
545 }
546 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
547 if (err < 0)
548 return err;
549
550 // PPS array.
551 count = bytestream2_get_byte(&gbc);
552 start = bytestream2_tell(&gbc);
553 for (i = 0; i < count; i++) {
554 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
555 return AVERROR_INVALIDDATA;
556 size = bytestream2_get_be16(&gbc);
557 if (bytestream2_get_bytes_left(&gbc) < size)
558 return AVERROR_INVALIDDATA;
559 bytestream2_skip(&gbc, size);
560 }
561 end = bytestream2_tell(&gbc);
562
563 err = ff_h2645_packet_split(&priv->read_packet,
564 frag->data + start, end - start,
565 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
566 if (err < 0) {
567 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
568 return err;
569 }
570 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
571 if (err < 0)
572 return err;
573
574 if (bytestream2_get_bytes_left(&gbc) > 0) {
575 av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
576 "header.\n", bytestream2_get_bytes_left(&gbc));
577 }
578
579 } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
580 // HVCC header.
581 size_t size, start, end;
582 int i, j, nb_arrays, nal_unit_type, nb_nals, version;
583
584 priv->mp4 = 1;
585
586 bytestream2_init(&gbc, frag->data, frag->data_size);
587
588 if (bytestream2_get_bytes_left(&gbc) < 23)
589 return AVERROR_INVALIDDATA;
590
591 version = bytestream2_get_byte(&gbc);
592 if (version != 1) {
593 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
594 "first byte %u.\n", version);
595 return AVERROR_INVALIDDATA;
596 }
597
598 bytestream2_skip(&gbc, 20);
599 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
600
601 nb_arrays = bytestream2_get_byte(&gbc);
602 for (i = 0; i < nb_arrays; i++) {
603 nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
604 nb_nals = bytestream2_get_be16(&gbc);
605
606 start = bytestream2_tell(&gbc);
607 for (j = 0; j < nb_nals; j++) {
608 if (bytestream2_get_bytes_left(&gbc) < 2)
609 return AVERROR_INVALIDDATA;
610 size = bytestream2_get_be16(&gbc);
611 if (bytestream2_get_bytes_left(&gbc) < size)
612 return AVERROR_INVALIDDATA;
613 bytestream2_skip(&gbc, size);
614 }
615 end = bytestream2_tell(&gbc);
616
617 err = ff_h2645_packet_split(&priv->read_packet,
618 frag->data + start, end - start,
619 ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
620 if (err < 0) {
621 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
622 "HVCC array %d (%d NAL units of type %d).\n",
623 i, nb_nals, nal_unit_type);
624 return err;
625 }
626 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
627 if (err < 0)
628 return err;
629 }
630
631 } else {
632 // Annex B, or later MP4 with already-known parameters.
633
634 err = ff_h2645_packet_split(&priv->read_packet,
635 frag->data, frag->data_size,
636 ctx->log_ctx,
637 priv->mp4, priv->nal_length_size,
638 codec_id, 1, 1);
639 if (err < 0)
640 return err;
641
642 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
643 if (err < 0)
644 return err;
645 }
646
647 return 0;
648 }
649
650 #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
651 static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
652 CodedBitstreamUnit *unit) \
653 { \
654 CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
655 H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
656 unsigned int id = ps_var->id_element; \
657 int err; \
658 if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
659 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
660 " id : %d.\n", id); \
661 return AVERROR_INVALIDDATA; \
662 } \
663 err = ff_cbs_make_unit_refcounted(ctx, unit); \
664 if (err < 0) \
665 return err; \
666 if (priv->ps_var[id] == priv->active_ ## ps_var) \
667 priv->active_ ## ps_var = NULL ; \
668 av_buffer_unref(&priv->ps_var ## _ref[id]); \
669 av_assert0(unit->content_ref); \
670 priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
671 if (!priv->ps_var ## _ref[id]) \
672 return AVERROR(ENOMEM); \
673 priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
674 if (!unit->content_ref) \
675 memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
676 return 0; \
677 }
678
679 cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
680 cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
681 cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
682 cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
683 cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
684
cbs_h264_read_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit)685 static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
686 CodedBitstreamUnit *unit)
687 {
688 GetBitContext gbc;
689 int err;
690
691 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
692 if (err < 0)
693 return err;
694
695 err = ff_cbs_alloc_unit_content2(ctx, unit);
696 if (err < 0)
697 return err;
698
699 switch (unit->type) {
700 case H264_NAL_SPS:
701 {
702 H264RawSPS *sps = unit->content;
703
704 err = cbs_h264_read_sps(ctx, &gbc, sps);
705 if (err < 0)
706 return err;
707
708 err = cbs_h264_replace_sps(ctx, unit);
709 if (err < 0)
710 return err;
711 }
712 break;
713
714 case H264_NAL_SPS_EXT:
715 {
716 err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
717 if (err < 0)
718 return err;
719 }
720 break;
721
722 case H264_NAL_PPS:
723 {
724 H264RawPPS *pps = unit->content;
725
726 err = cbs_h264_read_pps(ctx, &gbc, pps);
727 if (err < 0)
728 return err;
729
730 err = cbs_h264_replace_pps(ctx, unit);
731 if (err < 0)
732 return err;
733 }
734 break;
735
736 case H264_NAL_SLICE:
737 case H264_NAL_IDR_SLICE:
738 case H264_NAL_AUXILIARY_SLICE:
739 {
740 H264RawSlice *slice = unit->content;
741 int pos, len;
742
743 err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
744 if (err < 0)
745 return err;
746
747 if (!cbs_h2645_read_more_rbsp_data(&gbc))
748 return AVERROR_INVALIDDATA;
749
750 pos = get_bits_count(&gbc);
751 len = unit->data_size;
752
753 slice->data_size = len - pos / 8;
754 slice->data_ref = av_buffer_ref(unit->data_ref);
755 if (!slice->data_ref)
756 return AVERROR(ENOMEM);
757 slice->data = unit->data + pos / 8;
758 slice->data_bit_start = pos % 8;
759 }
760 break;
761
762 case H264_NAL_AUD:
763 {
764 err = cbs_h264_read_aud(ctx, &gbc, unit->content);
765 if (err < 0)
766 return err;
767 }
768 break;
769
770 case H264_NAL_SEI:
771 {
772 err = cbs_h264_read_sei(ctx, &gbc, unit->content);
773 if (err < 0)
774 return err;
775 }
776 break;
777
778 case H264_NAL_FILLER_DATA:
779 {
780 err = cbs_h264_read_filler(ctx, &gbc, unit->content);
781 if (err < 0)
782 return err;
783 }
784 break;
785
786 case H264_NAL_END_SEQUENCE:
787 case H264_NAL_END_STREAM:
788 {
789 err = (unit->type == H264_NAL_END_SEQUENCE ?
790 cbs_h264_read_end_of_sequence :
791 cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
792 if (err < 0)
793 return err;
794 }
795 break;
796
797 default:
798 return AVERROR(ENOSYS);
799 }
800
801 return 0;
802 }
803
cbs_h265_read_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit)804 static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
805 CodedBitstreamUnit *unit)
806 {
807 GetBitContext gbc;
808 int err;
809
810 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
811 if (err < 0)
812 return err;
813
814 err = ff_cbs_alloc_unit_content2(ctx, unit);
815 if (err < 0)
816 return err;
817
818 switch (unit->type) {
819 case HEVC_NAL_VPS:
820 {
821 H265RawVPS *vps = unit->content;
822
823 err = cbs_h265_read_vps(ctx, &gbc, vps);
824 if (err < 0)
825 return err;
826
827 err = cbs_h265_replace_vps(ctx, unit);
828 if (err < 0)
829 return err;
830 }
831 break;
832 case HEVC_NAL_SPS:
833 {
834 H265RawSPS *sps = unit->content;
835
836 err = cbs_h265_read_sps(ctx, &gbc, sps);
837 if (err < 0)
838 return err;
839
840 err = cbs_h265_replace_sps(ctx, unit);
841 if (err < 0)
842 return err;
843 }
844 break;
845
846 case HEVC_NAL_PPS:
847 {
848 H265RawPPS *pps = unit->content;
849
850 err = cbs_h265_read_pps(ctx, &gbc, pps);
851 if (err < 0)
852 return err;
853
854 err = cbs_h265_replace_pps(ctx, unit);
855 if (err < 0)
856 return err;
857 }
858 break;
859
860 case HEVC_NAL_TRAIL_N:
861 case HEVC_NAL_TRAIL_R:
862 case HEVC_NAL_TSA_N:
863 case HEVC_NAL_TSA_R:
864 case HEVC_NAL_STSA_N:
865 case HEVC_NAL_STSA_R:
866 case HEVC_NAL_RADL_N:
867 case HEVC_NAL_RADL_R:
868 case HEVC_NAL_RASL_N:
869 case HEVC_NAL_RASL_R:
870 case HEVC_NAL_BLA_W_LP:
871 case HEVC_NAL_BLA_W_RADL:
872 case HEVC_NAL_BLA_N_LP:
873 case HEVC_NAL_IDR_W_RADL:
874 case HEVC_NAL_IDR_N_LP:
875 case HEVC_NAL_CRA_NUT:
876 {
877 H265RawSlice *slice = unit->content;
878 int pos, len;
879
880 err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
881 if (err < 0)
882 return err;
883
884 if (!cbs_h2645_read_more_rbsp_data(&gbc))
885 return AVERROR_INVALIDDATA;
886
887 pos = get_bits_count(&gbc);
888 len = unit->data_size;
889
890 slice->data_size = len - pos / 8;
891 slice->data_ref = av_buffer_ref(unit->data_ref);
892 if (!slice->data_ref)
893 return AVERROR(ENOMEM);
894 slice->data = unit->data + pos / 8;
895 slice->data_bit_start = pos % 8;
896 }
897 break;
898
899 case HEVC_NAL_AUD:
900 {
901 err = cbs_h265_read_aud(ctx, &gbc, unit->content);
902 if (err < 0)
903 return err;
904 }
905 break;
906
907 case HEVC_NAL_SEI_PREFIX:
908 case HEVC_NAL_SEI_SUFFIX:
909 {
910 err = cbs_h265_read_sei(ctx, &gbc, unit->content,
911 unit->type == HEVC_NAL_SEI_PREFIX);
912
913 if (err < 0)
914 return err;
915 }
916 break;
917
918 default:
919 return AVERROR(ENOSYS);
920 }
921
922 return 0;
923 }
924
cbs_h2645_write_slice_data(CodedBitstreamContext * ctx,PutBitContext * pbc,const uint8_t * data,size_t data_size,int data_bit_start)925 static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
926 PutBitContext *pbc, const uint8_t *data,
927 size_t data_size, int data_bit_start)
928 {
929 size_t rest = data_size - (data_bit_start + 7) / 8;
930 const uint8_t *pos = data + data_bit_start / 8;
931
932 av_assert0(data_bit_start >= 0 &&
933 data_size > data_bit_start / 8);
934
935 if (data_size * 8 + 8 > put_bits_left(pbc))
936 return AVERROR(ENOSPC);
937
938 if (!rest)
939 goto rbsp_stop_one_bit;
940
941 // First copy the remaining bits of the first byte
942 // The above check ensures that we do not accidentally
943 // copy beyond the rbsp_stop_one_bit.
944 if (data_bit_start % 8)
945 put_bits(pbc, 8 - data_bit_start % 8,
946 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
947
948 if (put_bits_count(pbc) % 8 == 0) {
949 // If the writer is aligned at this point,
950 // memcpy can be used to improve performance.
951 // This happens normally for CABAC.
952 flush_put_bits(pbc);
953 memcpy(put_bits_ptr(pbc), pos, rest);
954 skip_put_bytes(pbc, rest);
955 } else {
956 // If not, we have to copy manually.
957 // rbsp_stop_one_bit forces us to special-case
958 // the last byte.
959 uint8_t temp;
960 int i;
961
962 for (; rest > 4; rest -= 4, pos += 4)
963 put_bits32(pbc, AV_RB32(pos));
964
965 for (; rest > 1; rest--, pos++)
966 put_bits(pbc, 8, *pos);
967
968 rbsp_stop_one_bit:
969 temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
970
971 av_assert0(temp);
972 i = ff_ctz(*pos);
973 temp = temp >> i;
974 i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
975 put_bits(pbc, i, temp);
976 if (put_bits_count(pbc) % 8)
977 put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
978 }
979
980 return 0;
981 }
982
cbs_h264_write_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit,PutBitContext * pbc)983 static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
984 CodedBitstreamUnit *unit,
985 PutBitContext *pbc)
986 {
987 int err;
988
989 switch (unit->type) {
990 case H264_NAL_SPS:
991 {
992 H264RawSPS *sps = unit->content;
993
994 err = cbs_h264_write_sps(ctx, pbc, sps);
995 if (err < 0)
996 return err;
997
998 err = cbs_h264_replace_sps(ctx, unit);
999 if (err < 0)
1000 return err;
1001 }
1002 break;
1003
1004 case H264_NAL_SPS_EXT:
1005 {
1006 H264RawSPSExtension *sps_ext = unit->content;
1007
1008 err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1009 if (err < 0)
1010 return err;
1011 }
1012 break;
1013
1014 case H264_NAL_PPS:
1015 {
1016 H264RawPPS *pps = unit->content;
1017
1018 err = cbs_h264_write_pps(ctx, pbc, pps);
1019 if (err < 0)
1020 return err;
1021
1022 err = cbs_h264_replace_pps(ctx, unit);
1023 if (err < 0)
1024 return err;
1025 }
1026 break;
1027
1028 case H264_NAL_SLICE:
1029 case H264_NAL_IDR_SLICE:
1030 case H264_NAL_AUXILIARY_SLICE:
1031 {
1032 H264RawSlice *slice = unit->content;
1033
1034 err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1035 if (err < 0)
1036 return err;
1037
1038 if (slice->data) {
1039 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1040 slice->data_size,
1041 slice->data_bit_start);
1042 if (err < 0)
1043 return err;
1044 } else {
1045 // No slice data - that was just the header.
1046 // (Bitstream may be unaligned!)
1047 }
1048 }
1049 break;
1050
1051 case H264_NAL_AUD:
1052 {
1053 err = cbs_h264_write_aud(ctx, pbc, unit->content);
1054 if (err < 0)
1055 return err;
1056 }
1057 break;
1058
1059 case H264_NAL_SEI:
1060 {
1061 err = cbs_h264_write_sei(ctx, pbc, unit->content);
1062 if (err < 0)
1063 return err;
1064 }
1065 break;
1066
1067 case H264_NAL_FILLER_DATA:
1068 {
1069 err = cbs_h264_write_filler(ctx, pbc, unit->content);
1070 if (err < 0)
1071 return err;
1072 }
1073 break;
1074
1075 case H264_NAL_END_SEQUENCE:
1076 {
1077 err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1078 if (err < 0)
1079 return err;
1080 }
1081 break;
1082
1083 case H264_NAL_END_STREAM:
1084 {
1085 err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1086 if (err < 0)
1087 return err;
1088 }
1089 break;
1090
1091 default:
1092 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1093 "NAL unit type %"PRIu32".\n", unit->type);
1094 return AVERROR_PATCHWELCOME;
1095 }
1096
1097 return 0;
1098 }
1099
cbs_h265_write_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit,PutBitContext * pbc)1100 static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1101 CodedBitstreamUnit *unit,
1102 PutBitContext *pbc)
1103 {
1104 int err;
1105
1106 switch (unit->type) {
1107 case HEVC_NAL_VPS:
1108 {
1109 H265RawVPS *vps = unit->content;
1110
1111 err = cbs_h265_write_vps(ctx, pbc, vps);
1112 if (err < 0)
1113 return err;
1114
1115 err = cbs_h265_replace_vps(ctx, unit);
1116 if (err < 0)
1117 return err;
1118 }
1119 break;
1120
1121 case HEVC_NAL_SPS:
1122 {
1123 H265RawSPS *sps = unit->content;
1124
1125 err = cbs_h265_write_sps(ctx, pbc, sps);
1126 if (err < 0)
1127 return err;
1128
1129 err = cbs_h265_replace_sps(ctx, unit);
1130 if (err < 0)
1131 return err;
1132 }
1133 break;
1134
1135 case HEVC_NAL_PPS:
1136 {
1137 H265RawPPS *pps = unit->content;
1138
1139 err = cbs_h265_write_pps(ctx, pbc, pps);
1140 if (err < 0)
1141 return err;
1142
1143 err = cbs_h265_replace_pps(ctx, unit);
1144 if (err < 0)
1145 return err;
1146 }
1147 break;
1148
1149 case HEVC_NAL_TRAIL_N:
1150 case HEVC_NAL_TRAIL_R:
1151 case HEVC_NAL_TSA_N:
1152 case HEVC_NAL_TSA_R:
1153 case HEVC_NAL_STSA_N:
1154 case HEVC_NAL_STSA_R:
1155 case HEVC_NAL_RADL_N:
1156 case HEVC_NAL_RADL_R:
1157 case HEVC_NAL_RASL_N:
1158 case HEVC_NAL_RASL_R:
1159 case HEVC_NAL_BLA_W_LP:
1160 case HEVC_NAL_BLA_W_RADL:
1161 case HEVC_NAL_BLA_N_LP:
1162 case HEVC_NAL_IDR_W_RADL:
1163 case HEVC_NAL_IDR_N_LP:
1164 case HEVC_NAL_CRA_NUT:
1165 {
1166 H265RawSlice *slice = unit->content;
1167
1168 err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1169 if (err < 0)
1170 return err;
1171
1172 if (slice->data) {
1173 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1174 slice->data_size,
1175 slice->data_bit_start);
1176 if (err < 0)
1177 return err;
1178 } else {
1179 // No slice data - that was just the header.
1180 }
1181 }
1182 break;
1183
1184 case HEVC_NAL_AUD:
1185 {
1186 err = cbs_h265_write_aud(ctx, pbc, unit->content);
1187 if (err < 0)
1188 return err;
1189 }
1190 break;
1191
1192 case HEVC_NAL_SEI_PREFIX:
1193 case HEVC_NAL_SEI_SUFFIX:
1194 {
1195 err = cbs_h265_write_sei(ctx, pbc, unit->content,
1196 unit->type == HEVC_NAL_SEI_PREFIX);
1197
1198 if (err < 0)
1199 return err;
1200 }
1201 break;
1202
1203 default:
1204 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1205 "NAL unit type %"PRIu32".\n", unit->type);
1206 return AVERROR_PATCHWELCOME;
1207 }
1208
1209 return 0;
1210 }
1211
cbs_h2645_assemble_fragment(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag)1212 static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1213 CodedBitstreamFragment *frag)
1214 {
1215 uint8_t *data;
1216 size_t max_size, dp, sp;
1217 int err, i, zero_run;
1218
1219 for (i = 0; i < frag->nb_units; i++) {
1220 // Data should already all have been written when we get here.
1221 av_assert0(frag->units[i].data);
1222 }
1223
1224 max_size = 0;
1225 for (i = 0; i < frag->nb_units; i++) {
1226 // Start code + content with worst-case emulation prevention.
1227 max_size += 4 + frag->units[i].data_size * 3 / 2;
1228 }
1229
1230 data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1231 if (!data)
1232 return AVERROR(ENOMEM);
1233
1234 dp = 0;
1235 for (i = 0; i < frag->nb_units; i++) {
1236 CodedBitstreamUnit *unit = &frag->units[i];
1237
1238 if (unit->data_bit_padding > 0) {
1239 if (i < frag->nb_units - 1)
1240 av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1241 "unaligned padding on non-final NAL unit.\n");
1242 else
1243 frag->data_bit_padding = unit->data_bit_padding;
1244 }
1245
1246 if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1247 (unit->type == H264_NAL_SPS ||
1248 unit->type == H264_NAL_PPS)) ||
1249 (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1250 (unit->type == HEVC_NAL_VPS ||
1251 unit->type == HEVC_NAL_SPS ||
1252 unit->type == HEVC_NAL_PPS)) ||
1253 i == 0 /* (Assume this is the start of an access unit.) */) {
1254 // zero_byte
1255 data[dp++] = 0;
1256 }
1257 // start_code_prefix_one_3bytes
1258 data[dp++] = 0;
1259 data[dp++] = 0;
1260 data[dp++] = 1;
1261
1262 zero_run = 0;
1263 for (sp = 0; sp < unit->data_size; sp++) {
1264 if (zero_run < 2) {
1265 if (unit->data[sp] == 0)
1266 ++zero_run;
1267 else
1268 zero_run = 0;
1269 } else {
1270 if ((unit->data[sp] & ~3) == 0) {
1271 // emulation_prevention_three_byte
1272 data[dp++] = 3;
1273 }
1274 zero_run = unit->data[sp] == 0;
1275 }
1276 data[dp++] = unit->data[sp];
1277 }
1278 }
1279
1280 av_assert0(dp <= max_size);
1281 err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1282 if (err)
1283 return err;
1284 memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1285
1286 frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1287 NULL, NULL, 0);
1288 if (!frag->data_ref) {
1289 av_freep(&data);
1290 return AVERROR(ENOMEM);
1291 }
1292
1293 frag->data = data;
1294 frag->data_size = dp;
1295
1296 return 0;
1297 }
1298
cbs_h264_flush(CodedBitstreamContext * ctx)1299 static void cbs_h264_flush(CodedBitstreamContext *ctx)
1300 {
1301 CodedBitstreamH264Context *h264 = ctx->priv_data;
1302
1303 for (int i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) {
1304 av_buffer_unref(&h264->sps_ref[i]);
1305 h264->sps[i] = NULL;
1306 }
1307 for (int i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) {
1308 av_buffer_unref(&h264->pps_ref[i]);
1309 h264->pps[i] = NULL;
1310 }
1311
1312 h264->active_sps = NULL;
1313 h264->active_pps = NULL;
1314 h264->last_slice_nal_unit_type = 0;
1315 }
1316
cbs_h264_close(CodedBitstreamContext * ctx)1317 static void cbs_h264_close(CodedBitstreamContext *ctx)
1318 {
1319 CodedBitstreamH264Context *h264 = ctx->priv_data;
1320 int i;
1321
1322 ff_h2645_packet_uninit(&h264->common.read_packet);
1323
1324 for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1325 av_buffer_unref(&h264->sps_ref[i]);
1326 for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1327 av_buffer_unref(&h264->pps_ref[i]);
1328 }
1329
cbs_h265_flush(CodedBitstreamContext * ctx)1330 static void cbs_h265_flush(CodedBitstreamContext *ctx)
1331 {
1332 CodedBitstreamH265Context *h265 = ctx->priv_data;
1333
1334 for (int i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) {
1335 av_buffer_unref(&h265->vps_ref[i]);
1336 h265->vps[i] = NULL;
1337 }
1338 for (int i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) {
1339 av_buffer_unref(&h265->sps_ref[i]);
1340 h265->sps[i] = NULL;
1341 }
1342 for (int i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) {
1343 av_buffer_unref(&h265->pps_ref[i]);
1344 h265->pps[i] = NULL;
1345 }
1346
1347 h265->active_vps = NULL;
1348 h265->active_sps = NULL;
1349 h265->active_pps = NULL;
1350 }
1351
cbs_h265_close(CodedBitstreamContext * ctx)1352 static void cbs_h265_close(CodedBitstreamContext *ctx)
1353 {
1354 CodedBitstreamH265Context *h265 = ctx->priv_data;
1355 int i;
1356
1357 ff_h2645_packet_uninit(&h265->common.read_packet);
1358
1359 for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1360 av_buffer_unref(&h265->vps_ref[i]);
1361 for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1362 av_buffer_unref(&h265->sps_ref[i]);
1363 for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1364 av_buffer_unref(&h265->pps_ref[i]);
1365 }
1366
cbs_h264_free_sei_payload(H264RawSEIPayload * payload)1367 static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
1368 {
1369 switch (payload->payload_type) {
1370 case H264_SEI_TYPE_BUFFERING_PERIOD:
1371 case H264_SEI_TYPE_PIC_TIMING:
1372 case H264_SEI_TYPE_PAN_SCAN_RECT:
1373 case H264_SEI_TYPE_RECOVERY_POINT:
1374 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
1375 case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
1376 case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
1377 break;
1378 case H264_SEI_TYPE_USER_DATA_REGISTERED:
1379 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
1380 break;
1381 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
1382 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
1383 break;
1384 default:
1385 av_buffer_unref(&payload->payload.other.data_ref);
1386 break;
1387 }
1388 }
1389
cbs_h264_free_sei(void * opaque,uint8_t * content)1390 static void cbs_h264_free_sei(void *opaque, uint8_t *content)
1391 {
1392 H264RawSEI *sei = (H264RawSEI*)content;
1393 int i;
1394 for (i = 0; i < sei->payload_count; i++)
1395 cbs_h264_free_sei_payload(&sei->payload[i]);
1396 av_freep(&content);
1397 }
1398
1399 static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = {
1400 CBS_UNIT_TYPE_POD(H264_NAL_SPS, H264RawSPS),
1401 CBS_UNIT_TYPE_POD(H264_NAL_SPS_EXT, H264RawSPSExtension),
1402
1403 CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id),
1404
1405 {
1406 .nb_unit_types = 3,
1407 .unit_types = {
1408 H264_NAL_IDR_SLICE,
1409 H264_NAL_SLICE,
1410 H264_NAL_AUXILIARY_SLICE,
1411 },
1412 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1413 .content_size = sizeof(H264RawSlice),
1414 .nb_ref_offsets = 1,
1415 .ref_offsets = { offsetof(H264RawSlice, data) },
1416 },
1417
1418 CBS_UNIT_TYPE_POD(H264_NAL_AUD, H264RawAUD),
1419 CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA, H264RawFiller),
1420 CBS_UNIT_TYPE_POD(H264_NAL_END_SEQUENCE, H264RawNALUnitHeader),
1421 CBS_UNIT_TYPE_POD(H264_NAL_END_STREAM, H264RawNALUnitHeader),
1422
1423 CBS_UNIT_TYPE_COMPLEX(H264_NAL_SEI, H264RawSEI, &cbs_h264_free_sei),
1424
1425 CBS_UNIT_TYPE_END_OF_LIST
1426 };
1427
cbs_h265_free_sei_payload(H265RawSEIPayload * payload)1428 static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
1429 {
1430 switch (payload->payload_type) {
1431 case HEVC_SEI_TYPE_BUFFERING_PERIOD:
1432 case HEVC_SEI_TYPE_PICTURE_TIMING:
1433 case HEVC_SEI_TYPE_PAN_SCAN_RECT:
1434 case HEVC_SEI_TYPE_RECOVERY_POINT:
1435 case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
1436 case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
1437 case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
1438 case HEVC_SEI_TYPE_TIME_CODE:
1439 case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
1440 case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
1441 case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
1442 case HEVC_SEI_TYPE_ALPHA_CHANNEL_INFO:
1443 break;
1444 case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
1445 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
1446 break;
1447 case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
1448 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
1449 break;
1450 default:
1451 av_buffer_unref(&payload->payload.other.data_ref);
1452 break;
1453 }
1454 av_buffer_unref(&payload->extension_data.data_ref);
1455 }
1456
cbs_h265_free_sei(void * opaque,uint8_t * content)1457 static void cbs_h265_free_sei(void *opaque, uint8_t *content)
1458 {
1459 H265RawSEI *sei = (H265RawSEI*)content;
1460 int i;
1461 for (i = 0; i < sei->payload_count; i++)
1462 cbs_h265_free_sei_payload(&sei->payload[i]);
1463 av_freep(&content);
1464 }
1465
1466 static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
1467 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_VPS, H265RawVPS, extension_data.data),
1468 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_SPS, H265RawSPS, extension_data.data),
1469 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_PPS, H265RawPPS, extension_data.data),
1470
1471 CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD),
1472
1473 {
1474 // Slices of non-IRAP pictures.
1475 .nb_unit_types = CBS_UNIT_TYPE_RANGE,
1476 .unit_type_range_start = HEVC_NAL_TRAIL_N,
1477 .unit_type_range_end = HEVC_NAL_RASL_R,
1478
1479 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1480 .content_size = sizeof(H265RawSlice),
1481 .nb_ref_offsets = 1,
1482 .ref_offsets = { offsetof(H265RawSlice, data) },
1483 },
1484
1485 {
1486 // Slices of IRAP pictures.
1487 .nb_unit_types = CBS_UNIT_TYPE_RANGE,
1488 .unit_type_range_start = HEVC_NAL_BLA_W_LP,
1489 .unit_type_range_end = HEVC_NAL_CRA_NUT,
1490
1491 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1492 .content_size = sizeof(H265RawSlice),
1493 .nb_ref_offsets = 1,
1494 .ref_offsets = { offsetof(H265RawSlice, data) },
1495 },
1496
1497 {
1498 .nb_unit_types = 2,
1499 .unit_types = {
1500 HEVC_NAL_SEI_PREFIX,
1501 HEVC_NAL_SEI_SUFFIX
1502 },
1503 .content_type = CBS_CONTENT_TYPE_COMPLEX,
1504 .content_size = sizeof(H265RawSEI),
1505 .content_free = &cbs_h265_free_sei,
1506 },
1507
1508 CBS_UNIT_TYPE_END_OF_LIST
1509 };
1510
1511 const CodedBitstreamType ff_cbs_type_h264 = {
1512 .codec_id = AV_CODEC_ID_H264,
1513
1514 .priv_data_size = sizeof(CodedBitstreamH264Context),
1515
1516 .unit_types = cbs_h264_unit_types,
1517
1518 .split_fragment = &cbs_h2645_split_fragment,
1519 .read_unit = &cbs_h264_read_nal_unit,
1520 .write_unit = &cbs_h264_write_nal_unit,
1521 .assemble_fragment = &cbs_h2645_assemble_fragment,
1522
1523 .flush = &cbs_h264_flush,
1524 .close = &cbs_h264_close,
1525 };
1526
1527 const CodedBitstreamType ff_cbs_type_h265 = {
1528 .codec_id = AV_CODEC_ID_HEVC,
1529
1530 .priv_data_size = sizeof(CodedBitstreamH265Context),
1531
1532 .unit_types = cbs_h265_unit_types,
1533
1534 .split_fragment = &cbs_h2645_split_fragment,
1535 .read_unit = &cbs_h265_read_nal_unit,
1536 .write_unit = &cbs_h265_write_nal_unit,
1537 .assemble_fragment = &cbs_h2645_assemble_fragment,
1538
1539 .flush = &cbs_h265_flush,
1540 .close = &cbs_h265_close,
1541 };
1542
ff_cbs_h264_add_sei_message(CodedBitstreamFragment * au,H264RawSEIPayload * payload)1543 int ff_cbs_h264_add_sei_message(CodedBitstreamFragment *au,
1544 H264RawSEIPayload *payload)
1545 {
1546 H264RawSEI *sei = NULL;
1547 int err, i;
1548
1549 // Find an existing SEI NAL unit to add to.
1550 for (i = 0; i < au->nb_units; i++) {
1551 if (au->units[i].type == H264_NAL_SEI) {
1552 sei = au->units[i].content;
1553 if (sei->payload_count < H264_MAX_SEI_PAYLOADS)
1554 break;
1555
1556 sei = NULL;
1557 }
1558 }
1559
1560 if (!sei) {
1561 // Need to make a new SEI NAL unit. Insert it before the first
1562 // slice data NAL unit; if no slice data, add at the end.
1563 AVBufferRef *sei_ref;
1564
1565 sei = av_mallocz(sizeof(*sei));
1566 if (!sei) {
1567 err = AVERROR(ENOMEM);
1568 goto fail;
1569 }
1570
1571 sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1572 sei->nal_unit_header.nal_ref_idc = 0;
1573
1574 sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1575 &cbs_h264_free_sei, NULL, 0);
1576 if (!sei_ref) {
1577 av_freep(&sei);
1578 err = AVERROR(ENOMEM);
1579 goto fail;
1580 }
1581
1582 for (i = 0; i < au->nb_units; i++) {
1583 if (au->units[i].type == H264_NAL_SLICE ||
1584 au->units[i].type == H264_NAL_IDR_SLICE)
1585 break;
1586 }
1587
1588 err = ff_cbs_insert_unit_content(au, i, H264_NAL_SEI,
1589 sei, sei_ref);
1590 av_buffer_unref(&sei_ref);
1591 if (err < 0)
1592 goto fail;
1593 }
1594
1595 memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1596 ++sei->payload_count;
1597
1598 return 0;
1599 fail:
1600 cbs_h264_free_sei_payload(payload);
1601 return err;
1602 }
1603
ff_cbs_h264_delete_sei_message(CodedBitstreamFragment * au,CodedBitstreamUnit * nal,int position)1604 void ff_cbs_h264_delete_sei_message(CodedBitstreamFragment *au,
1605 CodedBitstreamUnit *nal,
1606 int position)
1607 {
1608 H264RawSEI *sei = nal->content;
1609
1610 av_assert0(nal->type == H264_NAL_SEI);
1611 av_assert0(position >= 0 && position < sei->payload_count);
1612
1613 if (position == 0 && sei->payload_count == 1) {
1614 // Deleting NAL unit entirely.
1615 int i;
1616
1617 for (i = 0; i < au->nb_units; i++) {
1618 if (&au->units[i] == nal)
1619 break;
1620 }
1621
1622 ff_cbs_delete_unit(au, i);
1623 } else {
1624 cbs_h264_free_sei_payload(&sei->payload[position]);
1625
1626 --sei->payload_count;
1627 memmove(sei->payload + position,
1628 sei->payload + position + 1,
1629 (sei->payload_count - position) * sizeof(*sei->payload));
1630 }
1631 }
1632