2 * AVPacket functions for libavcodec
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
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"
30 #include "bytestream.h"
33 void av_init_packet(AVPacket *pkt)
35 pkt->pts = AV_NOPTS_VALUE;
36 pkt->dts = AV_NOPTS_VALUE;
39 #if FF_API_CONVERGENCE_DURATION
40 FF_DISABLE_DEPRECATION_WARNINGS
41 pkt->convergence_duration = 0;
42 FF_ENABLE_DEPRECATION_WARNINGS
45 pkt->stream_index = 0;
47 pkt->side_data = NULL;
48 pkt->side_data_elems = 0;
51 AVPacket *av_packet_alloc(void)
53 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
62 void av_packet_free(AVPacket **pkt)
67 av_packet_unref(*pkt);
71 static int packet_alloc(AVBufferRef **buf, int size)
74 if ((unsigned)size >= (unsigned)size + AV_INPUT_BUFFER_PADDING_SIZE)
75 return AVERROR(EINVAL);
77 ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
81 memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
86 int av_new_packet(AVPacket *pkt, int size)
88 AVBufferRef *buf = NULL;
89 int ret = packet_alloc(&buf, size);
95 pkt->data = buf->data;
101 void av_shrink_packet(AVPacket *pkt, int size)
103 if (pkt->size <= size)
106 memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
109 int av_grow_packet(AVPacket *pkt, int grow_by)
112 av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
114 return av_new_packet(pkt, grow_by);
115 if ((unsigned)grow_by >
116 INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
119 new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
121 int ret = av_buffer_realloc(&pkt->buf, new_size);
125 pkt->buf = av_buffer_alloc(new_size);
127 return AVERROR(ENOMEM);
128 memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
130 pkt->data = pkt->buf->data;
131 pkt->size += grow_by;
132 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
137 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
139 if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
140 return AVERROR(EINVAL);
142 pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
143 av_buffer_default_free, NULL, 0);
145 return AVERROR(ENOMEM);
153 #if FF_API_AVPACKET_OLD_API
154 FF_DISABLE_DEPRECATION_WARNINGS
155 #define ALLOC_MALLOC(data, size) data = av_malloc(size)
156 #define ALLOC_BUF(data, size) \
158 av_buffer_realloc(&pkt->buf, size); \
159 data = pkt->buf ? pkt->buf->data : NULL; \
162 #define DUP_DATA(dst, src, size, padding, ALLOC) \
166 if ((unsigned)(size) > \
167 (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
169 ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
175 memcpy(data, src, size); \
177 memset((uint8_t *)data + size, 0, \
178 AV_INPUT_BUFFER_PADDING_SIZE); \
182 /* Makes duplicates of data, side_data, but does not copy any other fields */
183 static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
186 pkt->side_data = NULL;
188 AVBufferRef *ref = av_buffer_ref(src->buf);
190 return AVERROR(ENOMEM);
192 pkt->data = ref->data;
194 DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
196 if (pkt->side_data_elems && dup)
197 pkt->side_data = src->side_data;
198 if (pkt->side_data_elems && !dup) {
199 return av_copy_packet_side_data(pkt, src);
204 av_packet_unref(pkt);
205 return AVERROR(ENOMEM);
208 int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
210 if (src->side_data_elems) {
212 DUP_DATA(pkt->side_data, src->side_data,
213 src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC);
215 memset(pkt->side_data, 0,
216 src->side_data_elems * sizeof(*src->side_data));
218 for (i = 0; i < src->side_data_elems; i++) {
219 DUP_DATA(pkt->side_data[i].data, src->side_data[i].data,
220 src->side_data[i].size, 1, ALLOC_MALLOC);
221 pkt->side_data[i].size = src->side_data[i].size;
222 pkt->side_data[i].type = src->side_data[i].type;
225 pkt->side_data_elems = src->side_data_elems;
229 av_packet_unref(pkt);
230 return AVERROR(ENOMEM);
232 FF_ENABLE_DEPRECATION_WARNINGS
235 int av_dup_packet(AVPacket *pkt)
239 if (!pkt->buf && pkt->data) {
241 return copy_packet_data(pkt, &tmp_pkt, 1);
246 int av_copy_packet(AVPacket *dst, const AVPacket *src)
249 return copy_packet_data(dst, src, 0);
252 void av_packet_free_side_data(AVPacket *pkt)
255 for (i = 0; i < pkt->side_data_elems; i++)
256 av_freep(&pkt->side_data[i].data);
257 av_freep(&pkt->side_data);
258 pkt->side_data_elems = 0;
261 #if FF_API_AVPACKET_OLD_API
262 FF_DISABLE_DEPRECATION_WARNINGS
263 void av_free_packet(AVPacket *pkt)
267 av_buffer_unref(&pkt->buf);
271 av_packet_free_side_data(pkt);
274 FF_ENABLE_DEPRECATION_WARNINGS
277 uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
280 int elems = pkt->side_data_elems;
282 if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data))
284 if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
287 pkt->side_data = av_realloc(pkt->side_data,
288 (elems + 1) * sizeof(*pkt->side_data));
292 pkt->side_data[elems].data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
293 if (!pkt->side_data[elems].data)
295 pkt->side_data[elems].size = size;
296 pkt->side_data[elems].type = type;
297 pkt->side_data_elems++;
299 return pkt->side_data[elems].data;
302 uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
307 for (i = 0; i < pkt->side_data_elems; i++) {
308 if (pkt->side_data[i].type == type) {
310 *size = pkt->side_data[i].size;
311 return pkt->side_data[i].data;
317 const char *av_packet_side_data_name(enum AVPacketSideDataType type)
320 case AV_PKT_DATA_PALETTE: return "Palette";
321 case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata";
322 case AV_PKT_DATA_PARAM_CHANGE: return "Param Change";
323 case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info";
324 case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain";
325 case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix";
326 case AV_PKT_DATA_STEREO3D: return "Stereo 3D";
327 case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type";
328 case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
329 case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
330 case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
331 case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
332 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
333 case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
334 case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
335 case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
340 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
342 int av_packet_merge_side_data(AVPacket *pkt){
343 if(pkt->side_data_elems){
347 uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
349 for (i=0; i<old.side_data_elems; i++) {
350 size += old.side_data[i].size + 5LL;
353 return AVERROR(EINVAL);
354 buf = av_buffer_alloc(size);
356 return AVERROR(ENOMEM);
358 pkt->data = p = buf->data;
359 pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
360 bytestream_put_buffer(&p, old.data, old.size);
361 for (i=old.side_data_elems-1; i>=0; i--) {
362 bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
363 bytestream_put_be32(&p, old.side_data[i].size);
364 *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
366 bytestream_put_be64(&p, FF_MERGE_MARKER);
367 av_assert0(p-pkt->data == pkt->size);
368 memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
369 av_packet_unref(&old);
370 pkt->side_data_elems = 0;
371 pkt->side_data = NULL;
377 int av_packet_split_side_data(AVPacket *pkt){
378 if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
383 p = pkt->data + pkt->size - 8 - 5;
386 if (size>INT_MAX || p - pkt->data < size)
393 pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
395 return AVERROR(ENOMEM);
397 p= pkt->data + pkt->size - 8 - 5;
400 av_assert0(size<=INT_MAX && p - pkt->data >= size);
401 pkt->side_data[i].data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
402 pkt->side_data[i].size = size;
403 pkt->side_data[i].type = p[4]&127;
404 if (!pkt->side_data[i].data)
405 return AVERROR(ENOMEM);
406 memcpy(pkt->side_data[i].data, p-size, size);
407 pkt->size -= size + 5;
413 pkt->side_data_elems = i+1;
419 uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
421 AVDictionaryEntry *t = NULL;
422 uint8_t *data = NULL;
428 while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
429 const size_t keylen = strlen(t->key);
430 const size_t valuelen = strlen(t->value);
431 const size_t new_size = *size + keylen + 1 + valuelen + 1;
432 uint8_t *const new_data = av_realloc(data, new_size);
437 if (new_size > INT_MAX)
440 memcpy(data + *size, t->key, keylen + 1);
441 memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
454 int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
456 const uint8_t *end = data + size;
459 if (!dict || !data || !size)
462 return AVERROR_INVALIDDATA;
464 const uint8_t *key = data;
465 const uint8_t *val = data + strlen(key) + 1;
468 return AVERROR_INVALIDDATA;
470 ret = av_dict_set(dict, key, val, 0);
473 data = val + strlen(val) + 1;
479 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
484 for (i = 0; i < pkt->side_data_elems; i++) {
485 if (pkt->side_data[i].type == type) {
486 if (size > pkt->side_data[i].size)
487 return AVERROR(ENOMEM);
488 pkt->side_data[i].size = size;
492 return AVERROR(ENOENT);
495 int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
502 dst->duration = src->duration;
503 #if FF_API_CONVERGENCE_DURATION
504 FF_DISABLE_DEPRECATION_WARNINGS
505 dst->convergence_duration = src->convergence_duration;
506 FF_ENABLE_DEPRECATION_WARNINGS
508 dst->flags = src->flags;
509 dst->stream_index = src->stream_index;
511 for (i = 0; i < src->side_data_elems; i++) {
512 enum AVPacketSideDataType type = src->side_data[i].type;
513 int size = src->side_data[i].size;
514 uint8_t *src_data = src->side_data[i].data;
515 uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
518 av_packet_free_side_data(dst);
519 return AVERROR(ENOMEM);
521 memcpy(dst_data, src_data, size);
527 void av_packet_unref(AVPacket *pkt)
529 av_packet_free_side_data(pkt);
530 av_buffer_unref(&pkt->buf);
536 int av_packet_ref(AVPacket *dst, const AVPacket *src)
540 ret = av_packet_copy_props(dst, src);
545 ret = packet_alloc(&dst->buf, src->size);
548 memcpy(dst->buf->data, src->data, src->size);
550 dst->buf = av_buffer_ref(src->buf);
552 ret = AVERROR(ENOMEM);
557 dst->size = src->size;
558 dst->data = dst->buf->data;
561 av_packet_free_side_data(dst);
565 AVPacket *av_packet_clone(AVPacket *src)
567 AVPacket *ret = av_packet_alloc();
572 if (av_packet_ref(ret, src))
573 av_packet_free(&ret);
578 void av_packet_move_ref(AVPacket *dst, AVPacket *src)
584 void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
586 if (pkt->pts != AV_NOPTS_VALUE)
587 pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
588 if (pkt->dts != AV_NOPTS_VALUE)
589 pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
590 if (pkt->duration > 0)
591 pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
592 #if FF_API_CONVERGENCE_DURATION
593 FF_DISABLE_DEPRECATION_WARNINGS
594 if (pkt->convergence_duration > 0)
595 pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
596 FF_ENABLE_DEPRECATION_WARNINGS
600 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
606 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
608 side_data_size = 4+4+8*error_count;
609 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
613 if (!side_data || side_data_size < 4+4+8*error_count)
614 return AVERROR(ENOMEM);
616 AV_WL32(side_data , quality );
617 side_data[4] = pict_type;
618 side_data[5] = error_count;
619 for (i = 0; i<error_count; i++)
620 AV_WL64(side_data+8 + 8*i , error[i]);