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_h264_free_pps(void * opaque,uint8_t * content)457 static void cbs_h264_free_pps(void *opaque, uint8_t *content)
458 {
459 H264RawPPS *pps = (H264RawPPS*)content;
460 av_buffer_unref(&pps->slice_group_id_ref);
461 av_freep(&content);
462 }
463
cbs_h264_free_sei_payload(H264RawSEIPayload * payload)464 static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
465 {
466 switch (payload->payload_type) {
467 case H264_SEI_TYPE_BUFFERING_PERIOD:
468 case H264_SEI_TYPE_PIC_TIMING:
469 case H264_SEI_TYPE_PAN_SCAN_RECT:
470 case H264_SEI_TYPE_RECOVERY_POINT:
471 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
472 case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
473 case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
474 break;
475 case H264_SEI_TYPE_USER_DATA_REGISTERED:
476 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
477 break;
478 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
479 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
480 break;
481 default:
482 av_buffer_unref(&payload->payload.other.data_ref);
483 break;
484 }
485 }
486
cbs_h264_free_sei(void * opaque,uint8_t * content)487 static void cbs_h264_free_sei(void *opaque, uint8_t *content)
488 {
489 H264RawSEI *sei = (H264RawSEI*)content;
490 int i;
491 for (i = 0; i < sei->payload_count; i++)
492 cbs_h264_free_sei_payload(&sei->payload[i]);
493 av_freep(&content);
494 }
495
cbs_h264_free_slice(void * opaque,uint8_t * content)496 static void cbs_h264_free_slice(void *opaque, uint8_t *content)
497 {
498 H264RawSlice *slice = (H264RawSlice*)content;
499 av_buffer_unref(&slice->data_ref);
500 av_freep(&content);
501 }
502
cbs_h265_free_vps(void * opaque,uint8_t * content)503 static void cbs_h265_free_vps(void *opaque, uint8_t *content)
504 {
505 H265RawVPS *vps = (H265RawVPS*)content;
506 av_buffer_unref(&vps->extension_data.data_ref);
507 av_freep(&content);
508 }
509
cbs_h265_free_sps(void * opaque,uint8_t * content)510 static void cbs_h265_free_sps(void *opaque, uint8_t *content)
511 {
512 H265RawSPS *sps = (H265RawSPS*)content;
513 av_buffer_unref(&sps->extension_data.data_ref);
514 av_freep(&content);
515 }
516
cbs_h265_free_pps(void * opaque,uint8_t * content)517 static void cbs_h265_free_pps(void *opaque, uint8_t *content)
518 {
519 H265RawPPS *pps = (H265RawPPS*)content;
520 av_buffer_unref(&pps->extension_data.data_ref);
521 av_freep(&content);
522 }
523
cbs_h265_free_slice(void * opaque,uint8_t * content)524 static void cbs_h265_free_slice(void *opaque, uint8_t *content)
525 {
526 H265RawSlice *slice = (H265RawSlice*)content;
527 av_buffer_unref(&slice->data_ref);
528 av_freep(&content);
529 }
530
cbs_h265_free_sei_payload(H265RawSEIPayload * payload)531 static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
532 {
533 switch (payload->payload_type) {
534 case HEVC_SEI_TYPE_BUFFERING_PERIOD:
535 case HEVC_SEI_TYPE_PICTURE_TIMING:
536 case HEVC_SEI_TYPE_PAN_SCAN_RECT:
537 case HEVC_SEI_TYPE_RECOVERY_POINT:
538 case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
539 case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
540 case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
541 case HEVC_SEI_TYPE_TIME_CODE:
542 case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
543 case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
544 case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
545 case HEVC_SEI_TYPE_ALPHA_CHANNEL_INFO:
546 break;
547 case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
548 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
549 break;
550 case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
551 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
552 break;
553 default:
554 av_buffer_unref(&payload->payload.other.data_ref);
555 break;
556 }
557 av_buffer_unref(&payload->extension_data.data_ref);
558 }
559
cbs_h265_free_sei(void * opaque,uint8_t * content)560 static void cbs_h265_free_sei(void *opaque, uint8_t *content)
561 {
562 H265RawSEI *sei = (H265RawSEI*)content;
563 int i;
564 for (i = 0; i < sei->payload_count; i++)
565 cbs_h265_free_sei_payload(&sei->payload[i]);
566 av_freep(&content);
567 }
568
cbs_h2645_fragment_add_nals(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag,const H2645Packet * packet)569 static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
570 CodedBitstreamFragment *frag,
571 const H2645Packet *packet)
572 {
573 int err, i;
574
575 for (i = 0; i < packet->nb_nals; i++) {
576 const H2645NAL *nal = &packet->nals[i];
577 AVBufferRef *ref;
578 size_t size = nal->size;
579
580 if (nal->nuh_layer_id > 0)
581 continue;
582
583 // Remove trailing zeroes.
584 while (size > 0 && nal->data[size - 1] == 0)
585 --size;
586 if (size == 0) {
587 av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
588 continue;
589 }
590
591 ref = (nal->data == nal->raw_data) ? frag->data_ref
592 : packet->rbsp.rbsp_buffer_ref;
593
594 err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
595 (uint8_t*)nal->data, size, ref);
596 if (err < 0)
597 return err;
598 }
599
600 return 0;
601 }
602
cbs_h2645_split_fragment(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag,int header)603 static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
604 CodedBitstreamFragment *frag,
605 int header)
606 {
607 enum AVCodecID codec_id = ctx->codec->codec_id;
608 CodedBitstreamH2645Context *priv = ctx->priv_data;
609 GetByteContext gbc;
610 int err;
611
612 av_assert0(frag->data && frag->nb_units == 0);
613 if (frag->data_size == 0)
614 return 0;
615
616 if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
617 // AVCC header.
618 size_t size, start, end;
619 int i, count, version;
620
621 priv->mp4 = 1;
622
623 bytestream2_init(&gbc, frag->data, frag->data_size);
624
625 if (bytestream2_get_bytes_left(&gbc) < 6)
626 return AVERROR_INVALIDDATA;
627
628 version = bytestream2_get_byte(&gbc);
629 if (version != 1) {
630 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
631 "first byte %u.\n", version);
632 return AVERROR_INVALIDDATA;
633 }
634
635 bytestream2_skip(&gbc, 3);
636 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
637
638 // SPS array.
639 count = bytestream2_get_byte(&gbc) & 0x1f;
640 start = bytestream2_tell(&gbc);
641 for (i = 0; i < count; i++) {
642 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
643 return AVERROR_INVALIDDATA;
644 size = bytestream2_get_be16(&gbc);
645 if (bytestream2_get_bytes_left(&gbc) < size)
646 return AVERROR_INVALIDDATA;
647 bytestream2_skip(&gbc, size);
648 }
649 end = bytestream2_tell(&gbc);
650
651 err = ff_h2645_packet_split(&priv->read_packet,
652 frag->data + start, end - start,
653 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
654 if (err < 0) {
655 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
656 return err;
657 }
658 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
659 if (err < 0)
660 return err;
661
662 // PPS array.
663 count = bytestream2_get_byte(&gbc);
664 start = bytestream2_tell(&gbc);
665 for (i = 0; i < count; i++) {
666 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
667 return AVERROR_INVALIDDATA;
668 size = bytestream2_get_be16(&gbc);
669 if (bytestream2_get_bytes_left(&gbc) < size)
670 return AVERROR_INVALIDDATA;
671 bytestream2_skip(&gbc, size);
672 }
673 end = bytestream2_tell(&gbc);
674
675 err = ff_h2645_packet_split(&priv->read_packet,
676 frag->data + start, end - start,
677 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
678 if (err < 0) {
679 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
680 return err;
681 }
682 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
683 if (err < 0)
684 return err;
685
686 if (bytestream2_get_bytes_left(&gbc) > 0) {
687 av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
688 "header.\n", bytestream2_get_bytes_left(&gbc));
689 }
690
691 } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
692 // HVCC header.
693 size_t size, start, end;
694 int i, j, nb_arrays, nal_unit_type, nb_nals, version;
695
696 priv->mp4 = 1;
697
698 bytestream2_init(&gbc, frag->data, frag->data_size);
699
700 if (bytestream2_get_bytes_left(&gbc) < 23)
701 return AVERROR_INVALIDDATA;
702
703 version = bytestream2_get_byte(&gbc);
704 if (version != 1) {
705 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
706 "first byte %u.\n", version);
707 return AVERROR_INVALIDDATA;
708 }
709
710 bytestream2_skip(&gbc, 20);
711 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
712
713 nb_arrays = bytestream2_get_byte(&gbc);
714 for (i = 0; i < nb_arrays; i++) {
715 nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
716 nb_nals = bytestream2_get_be16(&gbc);
717
718 start = bytestream2_tell(&gbc);
719 for (j = 0; j < nb_nals; j++) {
720 if (bytestream2_get_bytes_left(&gbc) < 2)
721 return AVERROR_INVALIDDATA;
722 size = bytestream2_get_be16(&gbc);
723 if (bytestream2_get_bytes_left(&gbc) < size)
724 return AVERROR_INVALIDDATA;
725 bytestream2_skip(&gbc, size);
726 }
727 end = bytestream2_tell(&gbc);
728
729 err = ff_h2645_packet_split(&priv->read_packet,
730 frag->data + start, end - start,
731 ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
732 if (err < 0) {
733 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
734 "HVCC array %d (%d NAL units of type %d).\n",
735 i, nb_nals, nal_unit_type);
736 return err;
737 }
738 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
739 if (err < 0)
740 return err;
741 }
742
743 } else {
744 // Annex B, or later MP4 with already-known parameters.
745
746 err = ff_h2645_packet_split(&priv->read_packet,
747 frag->data, frag->data_size,
748 ctx->log_ctx,
749 priv->mp4, priv->nal_length_size,
750 codec_id, 1, 1);
751 if (err < 0)
752 return err;
753
754 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
755 if (err < 0)
756 return err;
757 }
758
759 return 0;
760 }
761
762 #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
763 static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
764 CodedBitstreamUnit *unit) \
765 { \
766 CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
767 H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
768 unsigned int id = ps_var->id_element; \
769 if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
770 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
771 " id : %d.\n", id); \
772 return AVERROR_INVALIDDATA; \
773 } \
774 if (priv->ps_var[id] == priv->active_ ## ps_var) \
775 priv->active_ ## ps_var = NULL ; \
776 av_buffer_unref(&priv->ps_var ## _ref[id]); \
777 if (unit->content_ref) \
778 priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
779 else \
780 priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
781 if (!priv->ps_var ## _ref[id]) \
782 return AVERROR(ENOMEM); \
783 priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
784 if (!unit->content_ref) \
785 memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
786 return 0; \
787 }
788
789 cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
790 cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
791 cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
792 cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
793 cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
794
cbs_h264_read_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit)795 static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
796 CodedBitstreamUnit *unit)
797 {
798 GetBitContext gbc;
799 int err;
800
801 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
802 if (err < 0)
803 return err;
804
805 switch (unit->type) {
806 case H264_NAL_SPS:
807 {
808 H264RawSPS *sps;
809
810 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
811 if (err < 0)
812 return err;
813 sps = unit->content;
814
815 err = cbs_h264_read_sps(ctx, &gbc, sps);
816 if (err < 0)
817 return err;
818
819 err = cbs_h264_replace_sps(ctx, unit);
820 if (err < 0)
821 return err;
822 }
823 break;
824
825 case H264_NAL_SPS_EXT:
826 {
827 err = ff_cbs_alloc_unit_content(ctx, unit,
828 sizeof(H264RawSPSExtension),
829 NULL);
830 if (err < 0)
831 return err;
832
833 err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
834 if (err < 0)
835 return err;
836 }
837 break;
838
839 case H264_NAL_PPS:
840 {
841 H264RawPPS *pps;
842
843 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
844 &cbs_h264_free_pps);
845 if (err < 0)
846 return err;
847 pps = unit->content;
848
849 err = cbs_h264_read_pps(ctx, &gbc, pps);
850 if (err < 0)
851 return err;
852
853 err = cbs_h264_replace_pps(ctx, unit);
854 if (err < 0)
855 return err;
856 }
857 break;
858
859 case H264_NAL_SLICE:
860 case H264_NAL_IDR_SLICE:
861 case H264_NAL_AUXILIARY_SLICE:
862 {
863 H264RawSlice *slice;
864 int pos, len;
865
866 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
867 &cbs_h264_free_slice);
868 if (err < 0)
869 return err;
870 slice = unit->content;
871
872 err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
873 if (err < 0)
874 return err;
875
876 if (!cbs_h2645_read_more_rbsp_data(&gbc))
877 return AVERROR_INVALIDDATA;
878
879 pos = get_bits_count(&gbc);
880 len = unit->data_size;
881
882 slice->data_size = len - pos / 8;
883 slice->data_ref = av_buffer_ref(unit->data_ref);
884 if (!slice->data_ref)
885 return AVERROR(ENOMEM);
886 slice->data = unit->data + pos / 8;
887 slice->data_bit_start = pos % 8;
888 }
889 break;
890
891 case H264_NAL_AUD:
892 {
893 err = ff_cbs_alloc_unit_content(ctx, unit,
894 sizeof(H264RawAUD), NULL);
895 if (err < 0)
896 return err;
897
898 err = cbs_h264_read_aud(ctx, &gbc, unit->content);
899 if (err < 0)
900 return err;
901 }
902 break;
903
904 case H264_NAL_SEI:
905 {
906 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
907 &cbs_h264_free_sei);
908 if (err < 0)
909 return err;
910
911 err = cbs_h264_read_sei(ctx, &gbc, unit->content);
912 if (err < 0)
913 return err;
914 }
915 break;
916
917 case H264_NAL_FILLER_DATA:
918 {
919 err = ff_cbs_alloc_unit_content(ctx, unit,
920 sizeof(H264RawFiller), NULL);
921 if (err < 0)
922 return err;
923
924 err = cbs_h264_read_filler(ctx, &gbc, unit->content);
925 if (err < 0)
926 return err;
927 }
928 break;
929
930 case H264_NAL_END_SEQUENCE:
931 case H264_NAL_END_STREAM:
932 {
933 err = ff_cbs_alloc_unit_content(ctx, unit,
934 sizeof(H264RawNALUnitHeader),
935 NULL);
936 if (err < 0)
937 return err;
938
939 err = (unit->type == H264_NAL_END_SEQUENCE ?
940 cbs_h264_read_end_of_sequence :
941 cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
942 if (err < 0)
943 return err;
944 }
945 break;
946
947 default:
948 return AVERROR(ENOSYS);
949 }
950
951 return 0;
952 }
953
cbs_h265_read_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit)954 static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
955 CodedBitstreamUnit *unit)
956 {
957 GetBitContext gbc;
958 int err;
959
960 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
961 if (err < 0)
962 return err;
963
964 switch (unit->type) {
965 case HEVC_NAL_VPS:
966 {
967 H265RawVPS *vps;
968
969 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
970 &cbs_h265_free_vps);
971 if (err < 0)
972 return err;
973 vps = unit->content;
974
975 err = cbs_h265_read_vps(ctx, &gbc, vps);
976 if (err < 0)
977 return err;
978
979 err = cbs_h265_replace_vps(ctx, unit);
980 if (err < 0)
981 return err;
982 }
983 break;
984 case HEVC_NAL_SPS:
985 {
986 H265RawSPS *sps;
987
988 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
989 &cbs_h265_free_sps);
990 if (err < 0)
991 return err;
992 sps = unit->content;
993
994 err = cbs_h265_read_sps(ctx, &gbc, sps);
995 if (err < 0)
996 return err;
997
998 err = cbs_h265_replace_sps(ctx, unit);
999 if (err < 0)
1000 return err;
1001 }
1002 break;
1003
1004 case HEVC_NAL_PPS:
1005 {
1006 H265RawPPS *pps;
1007
1008 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
1009 &cbs_h265_free_pps);
1010 if (err < 0)
1011 return err;
1012 pps = unit->content;
1013
1014 err = cbs_h265_read_pps(ctx, &gbc, pps);
1015 if (err < 0)
1016 return err;
1017
1018 err = cbs_h265_replace_pps(ctx, unit);
1019 if (err < 0)
1020 return err;
1021 }
1022 break;
1023
1024 case HEVC_NAL_TRAIL_N:
1025 case HEVC_NAL_TRAIL_R:
1026 case HEVC_NAL_TSA_N:
1027 case HEVC_NAL_TSA_R:
1028 case HEVC_NAL_STSA_N:
1029 case HEVC_NAL_STSA_R:
1030 case HEVC_NAL_RADL_N:
1031 case HEVC_NAL_RADL_R:
1032 case HEVC_NAL_RASL_N:
1033 case HEVC_NAL_RASL_R:
1034 case HEVC_NAL_BLA_W_LP:
1035 case HEVC_NAL_BLA_W_RADL:
1036 case HEVC_NAL_BLA_N_LP:
1037 case HEVC_NAL_IDR_W_RADL:
1038 case HEVC_NAL_IDR_N_LP:
1039 case HEVC_NAL_CRA_NUT:
1040 {
1041 H265RawSlice *slice;
1042 int pos, len;
1043
1044 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
1045 &cbs_h265_free_slice);
1046 if (err < 0)
1047 return err;
1048 slice = unit->content;
1049
1050 err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
1051 if (err < 0)
1052 return err;
1053
1054 if (!cbs_h2645_read_more_rbsp_data(&gbc))
1055 return AVERROR_INVALIDDATA;
1056
1057 pos = get_bits_count(&gbc);
1058 len = unit->data_size;
1059
1060 slice->data_size = len - pos / 8;
1061 slice->data_ref = av_buffer_ref(unit->data_ref);
1062 if (!slice->data_ref)
1063 return AVERROR(ENOMEM);
1064 slice->data = unit->data + pos / 8;
1065 slice->data_bit_start = pos % 8;
1066 }
1067 break;
1068
1069 case HEVC_NAL_AUD:
1070 {
1071 err = ff_cbs_alloc_unit_content(ctx, unit,
1072 sizeof(H265RawAUD), NULL);
1073 if (err < 0)
1074 return err;
1075
1076 err = cbs_h265_read_aud(ctx, &gbc, unit->content);
1077 if (err < 0)
1078 return err;
1079 }
1080 break;
1081
1082 case HEVC_NAL_SEI_PREFIX:
1083 case HEVC_NAL_SEI_SUFFIX:
1084 {
1085 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
1086 &cbs_h265_free_sei);
1087
1088 if (err < 0)
1089 return err;
1090
1091 err = cbs_h265_read_sei(ctx, &gbc, unit->content,
1092 unit->type == HEVC_NAL_SEI_PREFIX);
1093
1094 if (err < 0)
1095 return err;
1096 }
1097 break;
1098
1099 default:
1100 return AVERROR(ENOSYS);
1101 }
1102
1103 return 0;
1104 }
1105
cbs_h2645_write_slice_data(CodedBitstreamContext * ctx,PutBitContext * pbc,const uint8_t * data,size_t data_size,int data_bit_start)1106 static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
1107 PutBitContext *pbc, const uint8_t *data,
1108 size_t data_size, int data_bit_start)
1109 {
1110 size_t rest = data_size - (data_bit_start + 7) / 8;
1111 const uint8_t *pos = data + data_bit_start / 8;
1112
1113 av_assert0(data_bit_start >= 0 &&
1114 data_size > data_bit_start / 8);
1115
1116 if (data_size * 8 + 8 > put_bits_left(pbc))
1117 return AVERROR(ENOSPC);
1118
1119 if (!rest)
1120 goto rbsp_stop_one_bit;
1121
1122 // First copy the remaining bits of the first byte
1123 // The above check ensures that we do not accidentally
1124 // copy beyond the rbsp_stop_one_bit.
1125 if (data_bit_start % 8)
1126 put_bits(pbc, 8 - data_bit_start % 8,
1127 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
1128
1129 if (put_bits_count(pbc) % 8 == 0) {
1130 // If the writer is aligned at this point,
1131 // memcpy can be used to improve performance.
1132 // This happens normally for CABAC.
1133 flush_put_bits(pbc);
1134 memcpy(put_bits_ptr(pbc), pos, rest);
1135 skip_put_bytes(pbc, rest);
1136 } else {
1137 // If not, we have to copy manually.
1138 // rbsp_stop_one_bit forces us to special-case
1139 // the last byte.
1140 uint8_t temp;
1141 int i;
1142
1143 for (; rest > 4; rest -= 4, pos += 4)
1144 put_bits32(pbc, AV_RB32(pos));
1145
1146 for (; rest > 1; rest--, pos++)
1147 put_bits(pbc, 8, *pos);
1148
1149 rbsp_stop_one_bit:
1150 temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
1151
1152 av_assert0(temp);
1153 i = ff_ctz(*pos);
1154 temp = temp >> i;
1155 i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
1156 put_bits(pbc, i, temp);
1157 if (put_bits_count(pbc) % 8)
1158 put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
1159 }
1160
1161 return 0;
1162 }
1163
cbs_h264_write_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit,PutBitContext * pbc)1164 static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
1165 CodedBitstreamUnit *unit,
1166 PutBitContext *pbc)
1167 {
1168 int err;
1169
1170 switch (unit->type) {
1171 case H264_NAL_SPS:
1172 {
1173 H264RawSPS *sps = unit->content;
1174
1175 err = cbs_h264_write_sps(ctx, pbc, sps);
1176 if (err < 0)
1177 return err;
1178
1179 err = cbs_h264_replace_sps(ctx, unit);
1180 if (err < 0)
1181 return err;
1182 }
1183 break;
1184
1185 case H264_NAL_SPS_EXT:
1186 {
1187 H264RawSPSExtension *sps_ext = unit->content;
1188
1189 err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1190 if (err < 0)
1191 return err;
1192 }
1193 break;
1194
1195 case H264_NAL_PPS:
1196 {
1197 H264RawPPS *pps = unit->content;
1198
1199 err = cbs_h264_write_pps(ctx, pbc, pps);
1200 if (err < 0)
1201 return err;
1202
1203 err = cbs_h264_replace_pps(ctx, unit);
1204 if (err < 0)
1205 return err;
1206 }
1207 break;
1208
1209 case H264_NAL_SLICE:
1210 case H264_NAL_IDR_SLICE:
1211 case H264_NAL_AUXILIARY_SLICE:
1212 {
1213 H264RawSlice *slice = unit->content;
1214
1215 err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1216 if (err < 0)
1217 return err;
1218
1219 if (slice->data) {
1220 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1221 slice->data_size,
1222 slice->data_bit_start);
1223 if (err < 0)
1224 return err;
1225 } else {
1226 // No slice data - that was just the header.
1227 // (Bitstream may be unaligned!)
1228 }
1229 }
1230 break;
1231
1232 case H264_NAL_AUD:
1233 {
1234 err = cbs_h264_write_aud(ctx, pbc, unit->content);
1235 if (err < 0)
1236 return err;
1237 }
1238 break;
1239
1240 case H264_NAL_SEI:
1241 {
1242 err = cbs_h264_write_sei(ctx, pbc, unit->content);
1243 if (err < 0)
1244 return err;
1245 }
1246 break;
1247
1248 case H264_NAL_FILLER_DATA:
1249 {
1250 err = cbs_h264_write_filler(ctx, pbc, unit->content);
1251 if (err < 0)
1252 return err;
1253 }
1254 break;
1255
1256 case H264_NAL_END_SEQUENCE:
1257 {
1258 err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1259 if (err < 0)
1260 return err;
1261 }
1262 break;
1263
1264 case H264_NAL_END_STREAM:
1265 {
1266 err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1267 if (err < 0)
1268 return err;
1269 }
1270 break;
1271
1272 default:
1273 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1274 "NAL unit type %"PRIu32".\n", unit->type);
1275 return AVERROR_PATCHWELCOME;
1276 }
1277
1278 return 0;
1279 }
1280
cbs_h265_write_nal_unit(CodedBitstreamContext * ctx,CodedBitstreamUnit * unit,PutBitContext * pbc)1281 static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1282 CodedBitstreamUnit *unit,
1283 PutBitContext *pbc)
1284 {
1285 int err;
1286
1287 switch (unit->type) {
1288 case HEVC_NAL_VPS:
1289 {
1290 H265RawVPS *vps = unit->content;
1291
1292 err = cbs_h265_write_vps(ctx, pbc, vps);
1293 if (err < 0)
1294 return err;
1295
1296 err = cbs_h265_replace_vps(ctx, unit);
1297 if (err < 0)
1298 return err;
1299 }
1300 break;
1301
1302 case HEVC_NAL_SPS:
1303 {
1304 H265RawSPS *sps = unit->content;
1305
1306 err = cbs_h265_write_sps(ctx, pbc, sps);
1307 if (err < 0)
1308 return err;
1309
1310 err = cbs_h265_replace_sps(ctx, unit);
1311 if (err < 0)
1312 return err;
1313 }
1314 break;
1315
1316 case HEVC_NAL_PPS:
1317 {
1318 H265RawPPS *pps = unit->content;
1319
1320 err = cbs_h265_write_pps(ctx, pbc, pps);
1321 if (err < 0)
1322 return err;
1323
1324 err = cbs_h265_replace_pps(ctx, unit);
1325 if (err < 0)
1326 return err;
1327 }
1328 break;
1329
1330 case HEVC_NAL_TRAIL_N:
1331 case HEVC_NAL_TRAIL_R:
1332 case HEVC_NAL_TSA_N:
1333 case HEVC_NAL_TSA_R:
1334 case HEVC_NAL_STSA_N:
1335 case HEVC_NAL_STSA_R:
1336 case HEVC_NAL_RADL_N:
1337 case HEVC_NAL_RADL_R:
1338 case HEVC_NAL_RASL_N:
1339 case HEVC_NAL_RASL_R:
1340 case HEVC_NAL_BLA_W_LP:
1341 case HEVC_NAL_BLA_W_RADL:
1342 case HEVC_NAL_BLA_N_LP:
1343 case HEVC_NAL_IDR_W_RADL:
1344 case HEVC_NAL_IDR_N_LP:
1345 case HEVC_NAL_CRA_NUT:
1346 {
1347 H265RawSlice *slice = unit->content;
1348
1349 err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1350 if (err < 0)
1351 return err;
1352
1353 if (slice->data) {
1354 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1355 slice->data_size,
1356 slice->data_bit_start);
1357 if (err < 0)
1358 return err;
1359 } else {
1360 // No slice data - that was just the header.
1361 }
1362 }
1363 break;
1364
1365 case HEVC_NAL_AUD:
1366 {
1367 err = cbs_h265_write_aud(ctx, pbc, unit->content);
1368 if (err < 0)
1369 return err;
1370 }
1371 break;
1372
1373 case HEVC_NAL_SEI_PREFIX:
1374 case HEVC_NAL_SEI_SUFFIX:
1375 {
1376 err = cbs_h265_write_sei(ctx, pbc, unit->content,
1377 unit->type == HEVC_NAL_SEI_PREFIX);
1378
1379 if (err < 0)
1380 return err;
1381 }
1382 break;
1383
1384 default:
1385 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1386 "NAL unit type %"PRIu32".\n", unit->type);
1387 return AVERROR_PATCHWELCOME;
1388 }
1389
1390 return 0;
1391 }
1392
cbs_h2645_assemble_fragment(CodedBitstreamContext * ctx,CodedBitstreamFragment * frag)1393 static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1394 CodedBitstreamFragment *frag)
1395 {
1396 uint8_t *data;
1397 size_t max_size, dp, sp;
1398 int err, i, zero_run;
1399
1400 for (i = 0; i < frag->nb_units; i++) {
1401 // Data should already all have been written when we get here.
1402 av_assert0(frag->units[i].data);
1403 }
1404
1405 max_size = 0;
1406 for (i = 0; i < frag->nb_units; i++) {
1407 // Start code + content with worst-case emulation prevention.
1408 max_size += 4 + frag->units[i].data_size * 3 / 2;
1409 }
1410
1411 data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1412 if (!data)
1413 return AVERROR(ENOMEM);
1414
1415 dp = 0;
1416 for (i = 0; i < frag->nb_units; i++) {
1417 CodedBitstreamUnit *unit = &frag->units[i];
1418
1419 if (unit->data_bit_padding > 0) {
1420 if (i < frag->nb_units - 1)
1421 av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1422 "unaligned padding on non-final NAL unit.\n");
1423 else
1424 frag->data_bit_padding = unit->data_bit_padding;
1425 }
1426
1427 if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1428 (unit->type == H264_NAL_SPS ||
1429 unit->type == H264_NAL_PPS)) ||
1430 (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1431 (unit->type == HEVC_NAL_VPS ||
1432 unit->type == HEVC_NAL_SPS ||
1433 unit->type == HEVC_NAL_PPS)) ||
1434 i == 0 /* (Assume this is the start of an access unit.) */) {
1435 // zero_byte
1436 data[dp++] = 0;
1437 }
1438 // start_code_prefix_one_3bytes
1439 data[dp++] = 0;
1440 data[dp++] = 0;
1441 data[dp++] = 1;
1442
1443 zero_run = 0;
1444 for (sp = 0; sp < unit->data_size; sp++) {
1445 if (zero_run < 2) {
1446 if (unit->data[sp] == 0)
1447 ++zero_run;
1448 else
1449 zero_run = 0;
1450 } else {
1451 if ((unit->data[sp] & ~3) == 0) {
1452 // emulation_prevention_three_byte
1453 data[dp++] = 3;
1454 }
1455 zero_run = unit->data[sp] == 0;
1456 }
1457 data[dp++] = unit->data[sp];
1458 }
1459 }
1460
1461 av_assert0(dp <= max_size);
1462 err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1463 if (err)
1464 return err;
1465 memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1466
1467 frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1468 NULL, NULL, 0);
1469 if (!frag->data_ref) {
1470 av_freep(&data);
1471 return AVERROR(ENOMEM);
1472 }
1473
1474 frag->data = data;
1475 frag->data_size = dp;
1476
1477 return 0;
1478 }
1479
cbs_h264_close(CodedBitstreamContext * ctx)1480 static void cbs_h264_close(CodedBitstreamContext *ctx)
1481 {
1482 CodedBitstreamH264Context *h264 = ctx->priv_data;
1483 int i;
1484
1485 ff_h2645_packet_uninit(&h264->common.read_packet);
1486
1487 for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1488 av_buffer_unref(&h264->sps_ref[i]);
1489 for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1490 av_buffer_unref(&h264->pps_ref[i]);
1491 }
1492
cbs_h265_close(CodedBitstreamContext * ctx)1493 static void cbs_h265_close(CodedBitstreamContext *ctx)
1494 {
1495 CodedBitstreamH265Context *h265 = ctx->priv_data;
1496 int i;
1497
1498 ff_h2645_packet_uninit(&h265->common.read_packet);
1499
1500 for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1501 av_buffer_unref(&h265->vps_ref[i]);
1502 for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1503 av_buffer_unref(&h265->sps_ref[i]);
1504 for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1505 av_buffer_unref(&h265->pps_ref[i]);
1506 }
1507
1508 const CodedBitstreamType ff_cbs_type_h264 = {
1509 .codec_id = AV_CODEC_ID_H264,
1510
1511 .priv_data_size = sizeof(CodedBitstreamH264Context),
1512
1513 .split_fragment = &cbs_h2645_split_fragment,
1514 .read_unit = &cbs_h264_read_nal_unit,
1515 .write_unit = &cbs_h264_write_nal_unit,
1516 .assemble_fragment = &cbs_h2645_assemble_fragment,
1517
1518 .close = &cbs_h264_close,
1519 };
1520
1521 const CodedBitstreamType ff_cbs_type_h265 = {
1522 .codec_id = AV_CODEC_ID_HEVC,
1523
1524 .priv_data_size = sizeof(CodedBitstreamH265Context),
1525
1526 .split_fragment = &cbs_h2645_split_fragment,
1527 .read_unit = &cbs_h265_read_nal_unit,
1528 .write_unit = &cbs_h265_write_nal_unit,
1529 .assemble_fragment = &cbs_h2645_assemble_fragment,
1530
1531 .close = &cbs_h265_close,
1532 };
1533
ff_cbs_h264_add_sei_message(CodedBitstreamContext * ctx,CodedBitstreamFragment * au,H264RawSEIPayload * payload)1534 int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
1535 CodedBitstreamFragment *au,
1536 H264RawSEIPayload *payload)
1537 {
1538 H264RawSEI *sei = NULL;
1539 int err, i;
1540
1541 // Find an existing SEI NAL unit to add to.
1542 for (i = 0; i < au->nb_units; i++) {
1543 if (au->units[i].type == H264_NAL_SEI) {
1544 sei = au->units[i].content;
1545 if (sei->payload_count < H264_MAX_SEI_PAYLOADS)
1546 break;
1547
1548 sei = NULL;
1549 }
1550 }
1551
1552 if (!sei) {
1553 // Need to make a new SEI NAL unit. Insert it before the first
1554 // slice data NAL unit; if no slice data, add at the end.
1555 AVBufferRef *sei_ref;
1556
1557 sei = av_mallocz(sizeof(*sei));
1558 if (!sei) {
1559 err = AVERROR(ENOMEM);
1560 goto fail;
1561 }
1562
1563 sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1564 sei->nal_unit_header.nal_ref_idc = 0;
1565
1566 sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1567 &cbs_h264_free_sei, NULL, 0);
1568 if (!sei_ref) {
1569 av_freep(&sei);
1570 err = AVERROR(ENOMEM);
1571 goto fail;
1572 }
1573
1574 for (i = 0; i < au->nb_units; i++) {
1575 if (au->units[i].type == H264_NAL_SLICE ||
1576 au->units[i].type == H264_NAL_IDR_SLICE)
1577 break;
1578 }
1579
1580 err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
1581 sei, sei_ref);
1582 av_buffer_unref(&sei_ref);
1583 if (err < 0)
1584 goto fail;
1585 }
1586
1587 memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1588 ++sei->payload_count;
1589
1590 return 0;
1591 fail:
1592 cbs_h264_free_sei_payload(payload);
1593 return err;
1594 }
1595
ff_cbs_h264_delete_sei_message(CodedBitstreamContext * ctx,CodedBitstreamFragment * au,CodedBitstreamUnit * nal,int position)1596 void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
1597 CodedBitstreamFragment *au,
1598 CodedBitstreamUnit *nal,
1599 int position)
1600 {
1601 H264RawSEI *sei = nal->content;
1602
1603 av_assert0(nal->type == H264_NAL_SEI);
1604 av_assert0(position >= 0 && position < sei->payload_count);
1605
1606 if (position == 0 && sei->payload_count == 1) {
1607 // Deleting NAL unit entirely.
1608 int i;
1609
1610 for (i = 0; i < au->nb_units; i++) {
1611 if (&au->units[i] == nal)
1612 break;
1613 }
1614
1615 ff_cbs_delete_unit(ctx, au, i);
1616 } else {
1617 cbs_h264_free_sei_payload(&sei->payload[position]);
1618
1619 --sei->payload_count;
1620 memmove(sei->payload + position,
1621 sei->payload + position + 1,
1622 (sei->payload_count - position) * sizeof(*sei->payload));
1623 }
1624 }
1625