1 /*
2 * AVPacket functions for libavcodec
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/common.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/mem.h"
29 #include "avcodec.h"
30 #include "bytestream.h"
31 #include "internal.h"
32
av_init_packet(AVPacket * pkt)33 void av_init_packet(AVPacket *pkt)
34 {
35 pkt->pts = AV_NOPTS_VALUE;
36 pkt->dts = AV_NOPTS_VALUE;
37 pkt->pos = -1;
38 pkt->duration = 0;
39 #if FF_API_CONVERGENCE_DURATION
40 FF_DISABLE_DEPRECATION_WARNINGS
41 pkt->convergence_duration = 0;
42 FF_ENABLE_DEPRECATION_WARNINGS
43 #endif
44 pkt->flags = 0;
45 pkt->stream_index = 0;
46 pkt->buf = NULL;
47 pkt->side_data = NULL;
48 pkt->side_data_elems = 0;
49 }
50
av_packet_alloc(void)51 AVPacket *av_packet_alloc(void)
52 {
53 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
54 if (!pkt)
55 return pkt;
56
57 av_packet_unref(pkt);
58
59 return pkt;
60 }
61
av_packet_free(AVPacket ** pkt)62 void av_packet_free(AVPacket **pkt)
63 {
64 if (!pkt || !*pkt)
65 return;
66
67 av_packet_unref(*pkt);
68 av_freep(pkt);
69 }
70
packet_alloc(AVBufferRef ** buf,int size)71 static int packet_alloc(AVBufferRef **buf, int size)
72 {
73 int ret;
74 if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
75 return AVERROR(EINVAL);
76
77 ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
78 if (ret < 0)
79 return ret;
80
81 memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
82
83 return 0;
84 }
85
av_new_packet(AVPacket * pkt,int size)86 int av_new_packet(AVPacket *pkt, int size)
87 {
88 AVBufferRef *buf = NULL;
89 int ret = packet_alloc(&buf, size);
90 if (ret < 0)
91 return ret;
92
93 av_init_packet(pkt);
94 pkt->buf = buf;
95 pkt->data = buf->data;
96 pkt->size = size;
97
98 return 0;
99 }
100
av_shrink_packet(AVPacket * pkt,int size)101 void av_shrink_packet(AVPacket *pkt, int size)
102 {
103 if (pkt->size <= size)
104 return;
105 pkt->size = size;
106 memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
107 }
108
av_grow_packet(AVPacket * pkt,int grow_by)109 int av_grow_packet(AVPacket *pkt, int grow_by)
110 {
111 int new_size;
112 av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
113 if ((unsigned)grow_by >
114 INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
115 return AVERROR(ENOMEM);
116
117 new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
118 if (pkt->buf) {
119 size_t data_offset;
120 uint8_t *old_data = pkt->data;
121 if (pkt->data == NULL) {
122 data_offset = 0;
123 pkt->data = pkt->buf->data;
124 } else {
125 data_offset = pkt->data - pkt->buf->data;
126 if (data_offset > INT_MAX - new_size)
127 return AVERROR(ENOMEM);
128 }
129
130 if (new_size + data_offset > pkt->buf->size) {
131 int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
132 if (ret < 0) {
133 pkt->data = old_data;
134 return ret;
135 }
136 pkt->data = pkt->buf->data + data_offset;
137 }
138 } else {
139 pkt->buf = av_buffer_alloc(new_size);
140 if (!pkt->buf)
141 return AVERROR(ENOMEM);
142 if (pkt->size > 0)
143 memcpy(pkt->buf->data, pkt->data, pkt->size);
144 pkt->data = pkt->buf->data;
145 }
146 pkt->size += grow_by;
147 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
148
149 return 0;
150 }
151
av_packet_from_data(AVPacket * pkt,uint8_t * data,int size)152 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
153 {
154 if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
155 return AVERROR(EINVAL);
156
157 pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
158 av_buffer_default_free, NULL, 0);
159 if (!pkt->buf)
160 return AVERROR(ENOMEM);
161
162 pkt->data = data;
163 pkt->size = size;
164
165 return 0;
166 }
167
168 #if FF_API_AVPACKET_OLD_API
169 FF_DISABLE_DEPRECATION_WARNINGS
170 #define ALLOC_MALLOC(data, size) data = av_malloc(size)
171 #define ALLOC_BUF(data, size) \
172 do { \
173 av_buffer_realloc(&pkt->buf, size); \
174 data = pkt->buf ? pkt->buf->data : NULL; \
175 } while (0)
176
177 #define DUP_DATA(dst, src, size, padding, ALLOC) \
178 do { \
179 void *data; \
180 if (padding) { \
181 if ((unsigned)(size) > \
182 (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
183 goto failed_alloc; \
184 ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
185 } else { \
186 ALLOC(data, size); \
187 } \
188 if (!data) \
189 goto failed_alloc; \
190 memcpy(data, src, size); \
191 if (padding) \
192 memset((uint8_t *)data + size, 0, \
193 AV_INPUT_BUFFER_PADDING_SIZE); \
194 dst = data; \
195 } while (0)
196
197 /* Makes duplicates of data, side_data, but does not copy any other fields */
copy_packet_data(AVPacket * pkt,const AVPacket * src,int dup)198 static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
199 {
200 pkt->data = NULL;
201 pkt->side_data = NULL;
202 pkt->side_data_elems = 0;
203 if (pkt->buf) {
204 AVBufferRef *ref = av_buffer_ref(src->buf);
205 if (!ref)
206 return AVERROR(ENOMEM);
207 pkt->buf = ref;
208 pkt->data = ref->data;
209 } else {
210 DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
211 }
212 if (src->side_data_elems && dup) {
213 pkt->side_data = src->side_data;
214 pkt->side_data_elems = src->side_data_elems;
215 }
216 if (src->side_data_elems && !dup) {
217 return av_copy_packet_side_data(pkt, src);
218 }
219 return 0;
220
221 failed_alloc:
222 av_packet_unref(pkt);
223 return AVERROR(ENOMEM);
224 }
225
av_copy_packet_side_data(AVPacket * pkt,const AVPacket * src)226 int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
227 {
228 if (src->side_data_elems) {
229 int i;
230 DUP_DATA(pkt->side_data, src->side_data,
231 src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC);
232 if (src != pkt) {
233 memset(pkt->side_data, 0,
234 src->side_data_elems * sizeof(*src->side_data));
235 }
236 for (i = 0; i < src->side_data_elems; i++) {
237 DUP_DATA(pkt->side_data[i].data, src->side_data[i].data,
238 src->side_data[i].size, 1, ALLOC_MALLOC);
239 pkt->side_data[i].size = src->side_data[i].size;
240 pkt->side_data[i].type = src->side_data[i].type;
241 }
242 }
243 pkt->side_data_elems = src->side_data_elems;
244 return 0;
245
246 failed_alloc:
247 av_packet_unref(pkt);
248 return AVERROR(ENOMEM);
249 }
250
av_dup_packet(AVPacket * pkt)251 int av_dup_packet(AVPacket *pkt)
252 {
253 AVPacket tmp_pkt;
254
255 if (!pkt->buf && pkt->data) {
256 tmp_pkt = *pkt;
257 return copy_packet_data(pkt, &tmp_pkt, 1);
258 }
259 return 0;
260 }
261
av_copy_packet(AVPacket * dst,const AVPacket * src)262 int av_copy_packet(AVPacket *dst, const AVPacket *src)
263 {
264 *dst = *src;
265 return copy_packet_data(dst, src, 0);
266 }
267 FF_ENABLE_DEPRECATION_WARNINGS
268 #endif
269
av_packet_free_side_data(AVPacket * pkt)270 void av_packet_free_side_data(AVPacket *pkt)
271 {
272 int i;
273 for (i = 0; i < pkt->side_data_elems; i++)
274 av_freep(&pkt->side_data[i].data);
275 av_freep(&pkt->side_data);
276 pkt->side_data_elems = 0;
277 }
278
279 #if FF_API_AVPACKET_OLD_API
280 FF_DISABLE_DEPRECATION_WARNINGS
av_free_packet(AVPacket * pkt)281 void av_free_packet(AVPacket *pkt)
282 {
283 if (pkt) {
284 if (pkt->buf)
285 av_buffer_unref(&pkt->buf);
286 pkt->data = NULL;
287 pkt->size = 0;
288
289 av_packet_free_side_data(pkt);
290 }
291 }
292 FF_ENABLE_DEPRECATION_WARNINGS
293 #endif
294
av_packet_add_side_data(AVPacket * pkt,enum AVPacketSideDataType type,uint8_t * data,size_t size)295 int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
296 uint8_t *data, size_t size)
297 {
298 AVPacketSideData *tmp;
299 int i, elems = pkt->side_data_elems;
300
301 for (i = 0; i < elems; i++) {
302 AVPacketSideData *sd = &pkt->side_data[i];
303
304 if (sd->type == type) {
305 av_free(sd->data);
306 sd->data = data;
307 sd->size = size;
308 return 0;
309 }
310 }
311
312 if ((unsigned)elems + 1 > AV_PKT_DATA_NB)
313 return AVERROR(ERANGE);
314
315 tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
316 if (!tmp)
317 return AVERROR(ENOMEM);
318
319 pkt->side_data = tmp;
320 pkt->side_data[elems].data = data;
321 pkt->side_data[elems].size = size;
322 pkt->side_data[elems].type = type;
323 pkt->side_data_elems++;
324
325 return 0;
326 }
327
328
av_packet_new_side_data(AVPacket * pkt,enum AVPacketSideDataType type,int size)329 uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
330 int size)
331 {
332 int ret;
333 uint8_t *data;
334
335 if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
336 return NULL;
337 data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
338 if (!data)
339 return NULL;
340
341 ret = av_packet_add_side_data(pkt, type, data, size);
342 if (ret < 0) {
343 av_freep(&data);
344 return NULL;
345 }
346
347 return data;
348 }
349
av_packet_get_side_data(const AVPacket * pkt,enum AVPacketSideDataType type,int * size)350 uint8_t *av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
351 int *size)
352 {
353 int i;
354
355 for (i = 0; i < pkt->side_data_elems; i++) {
356 if (pkt->side_data[i].type == type) {
357 if (size)
358 *size = pkt->side_data[i].size;
359 return pkt->side_data[i].data;
360 }
361 }
362 if (size)
363 *size = 0;
364 return NULL;
365 }
366
av_packet_side_data_name(enum AVPacketSideDataType type)367 const char *av_packet_side_data_name(enum AVPacketSideDataType type)
368 {
369 switch(type) {
370 case AV_PKT_DATA_PALETTE: return "Palette";
371 case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata";
372 case AV_PKT_DATA_PARAM_CHANGE: return "Param Change";
373 case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info";
374 case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain";
375 case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix";
376 case AV_PKT_DATA_STEREO3D: return "Stereo 3D";
377 case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type";
378 case AV_PKT_DATA_QUALITY_STATS: return "Quality stats";
379 case AV_PKT_DATA_FALLBACK_TRACK: return "Fallback track";
380 case AV_PKT_DATA_CPB_PROPERTIES: return "CPB properties";
381 case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
382 case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
383 case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
384 case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
385 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
386 case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
387 case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
388 case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
389 case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
390 case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
391 case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
392 case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
393 case AV_PKT_DATA_A53_CC: return "A53 Closed Captions";
394 case AV_PKT_DATA_ENCRYPTION_INIT_INFO: return "Encryption initialization data";
395 case AV_PKT_DATA_ENCRYPTION_INFO: return "Encryption info";
396 case AV_PKT_DATA_AFD: return "Active Format Description data";
397 }
398 return NULL;
399 }
400
401 #if FF_API_MERGE_SD_API
402
403 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
404
av_packet_merge_side_data(AVPacket * pkt)405 int av_packet_merge_side_data(AVPacket *pkt){
406 if(pkt->side_data_elems){
407 AVBufferRef *buf;
408 int i;
409 uint8_t *p;
410 uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
411 AVPacket old= *pkt;
412 for (i=0; i<old.side_data_elems; i++) {
413 size += old.side_data[i].size + 5LL;
414 }
415 if (size > INT_MAX)
416 return AVERROR(EINVAL);
417 buf = av_buffer_alloc(size);
418 if (!buf)
419 return AVERROR(ENOMEM);
420 pkt->buf = buf;
421 pkt->data = p = buf->data;
422 pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
423 bytestream_put_buffer(&p, old.data, old.size);
424 for (i=old.side_data_elems-1; i>=0; i--) {
425 bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
426 bytestream_put_be32(&p, old.side_data[i].size);
427 *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
428 }
429 bytestream_put_be64(&p, FF_MERGE_MARKER);
430 av_assert0(p-pkt->data == pkt->size);
431 memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
432 av_packet_unref(&old);
433 pkt->side_data_elems = 0;
434 pkt->side_data = NULL;
435 return 1;
436 }
437 return 0;
438 }
439
av_packet_split_side_data(AVPacket * pkt)440 int av_packet_split_side_data(AVPacket *pkt){
441 if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
442 int i;
443 unsigned int size;
444 uint8_t *p;
445
446 p = pkt->data + pkt->size - 8 - 5;
447 for (i=1; ; i++){
448 size = AV_RB32(p);
449 if (size>INT_MAX - 5 || p - pkt->data < size)
450 return 0;
451 if (p[4]&128)
452 break;
453 if (p - pkt->data < size + 5)
454 return 0;
455 p-= size+5;
456 }
457
458 if (i > AV_PKT_DATA_NB)
459 return AVERROR(ERANGE);
460
461 pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
462 if (!pkt->side_data)
463 return AVERROR(ENOMEM);
464
465 p= pkt->data + pkt->size - 8 - 5;
466 for (i=0; ; i++){
467 size= AV_RB32(p);
468 av_assert0(size<=INT_MAX - 5 && p - pkt->data >= size);
469 pkt->side_data[i].data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
470 pkt->side_data[i].size = size;
471 pkt->side_data[i].type = p[4]&127;
472 if (!pkt->side_data[i].data)
473 return AVERROR(ENOMEM);
474 memcpy(pkt->side_data[i].data, p-size, size);
475 pkt->size -= size + 5;
476 if(p[4]&128)
477 break;
478 p-= size+5;
479 }
480 pkt->size -= 8;
481 pkt->side_data_elems = i+1;
482 return 1;
483 }
484 return 0;
485 }
486 #endif
487
av_packet_pack_dictionary(AVDictionary * dict,int * size)488 uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
489 {
490 AVDictionaryEntry *t = NULL;
491 uint8_t *data = NULL;
492 *size = 0;
493
494 if (!dict)
495 return NULL;
496
497 while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
498 const size_t keylen = strlen(t->key);
499 const size_t valuelen = strlen(t->value);
500 const size_t new_size = *size + keylen + 1 + valuelen + 1;
501 uint8_t *const new_data = av_realloc(data, new_size);
502
503 if (!new_data)
504 goto fail;
505 data = new_data;
506 if (new_size > INT_MAX)
507 goto fail;
508
509 memcpy(data + *size, t->key, keylen + 1);
510 memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
511
512 *size = new_size;
513 }
514
515 return data;
516
517 fail:
518 av_freep(&data);
519 *size = 0;
520 return NULL;
521 }
522
av_packet_unpack_dictionary(const uint8_t * data,int size,AVDictionary ** dict)523 int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
524 {
525 const uint8_t *end;
526 int ret = 0;
527
528 if (!dict || !data || !size)
529 return ret;
530 end = data + size;
531 if (size && end[-1])
532 return AVERROR_INVALIDDATA;
533 while (data < end) {
534 const uint8_t *key = data;
535 const uint8_t *val = data + strlen(key) + 1;
536
537 if (val >= end || !*key)
538 return AVERROR_INVALIDDATA;
539
540 ret = av_dict_set(dict, key, val, 0);
541 if (ret < 0)
542 break;
543 data = val + strlen(val) + 1;
544 }
545
546 return ret;
547 }
548
av_packet_shrink_side_data(AVPacket * pkt,enum AVPacketSideDataType type,int size)549 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
550 int size)
551 {
552 int i;
553
554 for (i = 0; i < pkt->side_data_elems; i++) {
555 if (pkt->side_data[i].type == type) {
556 if (size > pkt->side_data[i].size)
557 return AVERROR(ENOMEM);
558 pkt->side_data[i].size = size;
559 return 0;
560 }
561 }
562 return AVERROR(ENOENT);
563 }
564
av_packet_copy_props(AVPacket * dst,const AVPacket * src)565 int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
566 {
567 int i;
568
569 dst->pts = src->pts;
570 dst->dts = src->dts;
571 dst->pos = src->pos;
572 dst->duration = src->duration;
573 #if FF_API_CONVERGENCE_DURATION
574 FF_DISABLE_DEPRECATION_WARNINGS
575 dst->convergence_duration = src->convergence_duration;
576 FF_ENABLE_DEPRECATION_WARNINGS
577 #endif
578 dst->flags = src->flags;
579 dst->stream_index = src->stream_index;
580
581 dst->side_data = NULL;
582 dst->side_data_elems = 0;
583 for (i = 0; i < src->side_data_elems; i++) {
584 enum AVPacketSideDataType type = src->side_data[i].type;
585 int size = src->side_data[i].size;
586 uint8_t *src_data = src->side_data[i].data;
587 uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
588
589 if (!dst_data) {
590 av_packet_free_side_data(dst);
591 return AVERROR(ENOMEM);
592 }
593 memcpy(dst_data, src_data, size);
594 }
595
596 return 0;
597 }
598
av_packet_unref(AVPacket * pkt)599 void av_packet_unref(AVPacket *pkt)
600 {
601 av_packet_free_side_data(pkt);
602 av_buffer_unref(&pkt->buf);
603 av_init_packet(pkt);
604 pkt->data = NULL;
605 pkt->size = 0;
606 }
607
av_packet_ref(AVPacket * dst,const AVPacket * src)608 int av_packet_ref(AVPacket *dst, const AVPacket *src)
609 {
610 int ret;
611
612 ret = av_packet_copy_props(dst, src);
613 if (ret < 0)
614 return ret;
615
616 if (!src->buf) {
617 ret = packet_alloc(&dst->buf, src->size);
618 if (ret < 0)
619 goto fail;
620 av_assert1(!src->size || src->data);
621 if (src->size)
622 memcpy(dst->buf->data, src->data, src->size);
623
624 dst->data = dst->buf->data;
625 } else {
626 dst->buf = av_buffer_ref(src->buf);
627 if (!dst->buf) {
628 ret = AVERROR(ENOMEM);
629 goto fail;
630 }
631 dst->data = src->data;
632 }
633
634 dst->size = src->size;
635
636 return 0;
637 fail:
638 av_packet_free_side_data(dst);
639 return ret;
640 }
641
av_packet_clone(const AVPacket * src)642 AVPacket *av_packet_clone(const AVPacket *src)
643 {
644 AVPacket *ret = av_packet_alloc();
645
646 if (!ret)
647 return ret;
648
649 if (av_packet_ref(ret, src))
650 av_packet_free(&ret);
651
652 return ret;
653 }
654
av_packet_move_ref(AVPacket * dst,AVPacket * src)655 void av_packet_move_ref(AVPacket *dst, AVPacket *src)
656 {
657 *dst = *src;
658 av_init_packet(src);
659 src->data = NULL;
660 src->size = 0;
661 }
662
av_packet_make_refcounted(AVPacket * pkt)663 int av_packet_make_refcounted(AVPacket *pkt)
664 {
665 int ret;
666
667 if (pkt->buf)
668 return 0;
669
670 ret = packet_alloc(&pkt->buf, pkt->size);
671 if (ret < 0)
672 return ret;
673 av_assert1(!pkt->size || pkt->data);
674 if (pkt->size)
675 memcpy(pkt->buf->data, pkt->data, pkt->size);
676
677 pkt->data = pkt->buf->data;
678
679 return 0;
680 }
681
av_packet_make_writable(AVPacket * pkt)682 int av_packet_make_writable(AVPacket *pkt)
683 {
684 AVBufferRef *buf = NULL;
685 int ret;
686
687 if (pkt->buf && av_buffer_is_writable(pkt->buf))
688 return 0;
689
690 ret = packet_alloc(&buf, pkt->size);
691 if (ret < 0)
692 return ret;
693 av_assert1(!pkt->size || pkt->data);
694 if (pkt->size)
695 memcpy(buf->data, pkt->data, pkt->size);
696
697 av_buffer_unref(&pkt->buf);
698 pkt->buf = buf;
699 pkt->data = buf->data;
700
701 return 0;
702 }
703
av_packet_rescale_ts(AVPacket * pkt,AVRational src_tb,AVRational dst_tb)704 void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
705 {
706 if (pkt->pts != AV_NOPTS_VALUE)
707 pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
708 if (pkt->dts != AV_NOPTS_VALUE)
709 pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
710 if (pkt->duration > 0)
711 pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
712 #if FF_API_CONVERGENCE_DURATION
713 FF_DISABLE_DEPRECATION_WARNINGS
714 if (pkt->convergence_duration > 0)
715 pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
716 FF_ENABLE_DEPRECATION_WARNINGS
717 #endif
718 }
719
ff_side_data_set_encoder_stats(AVPacket * pkt,int quality,int64_t * error,int error_count,int pict_type)720 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
721 {
722 uint8_t *side_data;
723 int side_data_size;
724 int i;
725
726 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
727 if (!side_data) {
728 side_data_size = 4+4+8*error_count;
729 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
730 side_data_size);
731 }
732
733 if (!side_data || side_data_size < 4+4+8*error_count)
734 return AVERROR(ENOMEM);
735
736 AV_WL32(side_data , quality );
737 side_data[4] = pict_type;
738 side_data[5] = error_count;
739 for (i = 0; i<error_count; i++)
740 AV_WL64(side_data+8 + 8*i , error[i]);
741
742 return 0;
743 }
744