| 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 | |
| 33 | #if FF_API_DESTRUCT_PACKET |
| 34 | |
| 35 | void av_destruct_packet(AVPacket *pkt) |
| 36 | { |
| 37 | av_free(pkt->data); |
| 38 | pkt->data = NULL; |
| 39 | pkt->size = 0; |
| 40 | } |
| 41 | |
| 42 | /* a dummy destruct callback for the callers that assume AVPacket.destruct == |
| 43 | * NULL => static data */ |
| 44 | static void dummy_destruct_packet(AVPacket *pkt) |
| 45 | { |
| 46 | av_assert0(0); |
| 47 | } |
| 48 | #endif |
| 49 | |
| 50 | void av_init_packet(AVPacket *pkt) |
| 51 | { |
| 52 | pkt->pts = AV_NOPTS_VALUE; |
| 53 | pkt->dts = AV_NOPTS_VALUE; |
| 54 | pkt->pos = -1; |
| 55 | pkt->duration = 0; |
| 56 | pkt->convergence_duration = 0; |
| 57 | pkt->flags = 0; |
| 58 | pkt->stream_index = 0; |
| 59 | #if FF_API_DESTRUCT_PACKET |
| 60 | FF_DISABLE_DEPRECATION_WARNINGS |
| 61 | pkt->destruct = NULL; |
| 62 | FF_ENABLE_DEPRECATION_WARNINGS |
| 63 | #endif |
| 64 | pkt->buf = NULL; |
| 65 | pkt->side_data = NULL; |
| 66 | pkt->side_data_elems = 0; |
| 67 | } |
| 68 | |
| 69 | static int packet_alloc(AVBufferRef **buf, int size) |
| 70 | { |
| 71 | int ret; |
| 72 | if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) |
| 73 | return AVERROR(EINVAL); |
| 74 | |
| 75 | ret = av_buffer_realloc(buf, size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 76 | if (ret < 0) |
| 77 | return ret; |
| 78 | |
| 79 | memset((*buf)->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | int av_new_packet(AVPacket *pkt, int size) |
| 85 | { |
| 86 | AVBufferRef *buf = NULL; |
| 87 | int ret = packet_alloc(&buf, size); |
| 88 | if (ret < 0) |
| 89 | return ret; |
| 90 | |
| 91 | av_init_packet(pkt); |
| 92 | pkt->buf = buf; |
| 93 | pkt->data = buf->data; |
| 94 | pkt->size = size; |
| 95 | #if FF_API_DESTRUCT_PACKET |
| 96 | FF_DISABLE_DEPRECATION_WARNINGS |
| 97 | pkt->destruct = dummy_destruct_packet; |
| 98 | FF_ENABLE_DEPRECATION_WARNINGS |
| 99 | #endif |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | void av_shrink_packet(AVPacket *pkt, int size) |
| 105 | { |
| 106 | if (pkt->size <= size) |
| 107 | return; |
| 108 | pkt->size = size; |
| 109 | memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| 110 | } |
| 111 | |
| 112 | int av_grow_packet(AVPacket *pkt, int grow_by) |
| 113 | { |
| 114 | int new_size; |
| 115 | av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE); |
| 116 | if (!pkt->size) |
| 117 | return av_new_packet(pkt, grow_by); |
| 118 | if ((unsigned)grow_by > |
| 119 | INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)) |
| 120 | return -1; |
| 121 | |
| 122 | new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE; |
| 123 | if (pkt->buf) { |
| 124 | int ret = av_buffer_realloc(&pkt->buf, new_size); |
| 125 | if (ret < 0) |
| 126 | return ret; |
| 127 | } else { |
| 128 | pkt->buf = av_buffer_alloc(new_size); |
| 129 | if (!pkt->buf) |
| 130 | return AVERROR(ENOMEM); |
| 131 | memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by)); |
| 132 | #if FF_API_DESTRUCT_PACKET |
| 133 | FF_DISABLE_DEPRECATION_WARNINGS |
| 134 | pkt->destruct = dummy_destruct_packet; |
| 135 | FF_ENABLE_DEPRECATION_WARNINGS |
| 136 | #endif |
| 137 | } |
| 138 | pkt->data = pkt->buf->data; |
| 139 | pkt->size += grow_by; |
| 140 | memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size) |
| 146 | { |
| 147 | if (size >= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) |
| 148 | return AVERROR(EINVAL); |
| 149 | |
| 150 | pkt->buf = av_buffer_create(data, size + FF_INPUT_BUFFER_PADDING_SIZE, |
| 151 | av_buffer_default_free, NULL, 0); |
| 152 | if (!pkt->buf) |
| 153 | return AVERROR(ENOMEM); |
| 154 | |
| 155 | pkt->data = data; |
| 156 | pkt->size = size; |
| 157 | #if FF_API_DESTRUCT_PACKET |
| 158 | FF_DISABLE_DEPRECATION_WARNINGS |
| 159 | pkt->destruct = dummy_destruct_packet; |
| 160 | FF_ENABLE_DEPRECATION_WARNINGS |
| 161 | #endif |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | #define ALLOC_MALLOC(data, size) data = av_malloc(size) |
| 167 | #define ALLOC_BUF(data, size) \ |
| 168 | do { \ |
| 169 | av_buffer_realloc(&pkt->buf, size); \ |
| 170 | data = pkt->buf ? pkt->buf->data : NULL; \ |
| 171 | } while (0) |
| 172 | |
| 173 | #define DUP_DATA(dst, src, size, padding, ALLOC) \ |
| 174 | do { \ |
| 175 | void *data; \ |
| 176 | if (padding) { \ |
| 177 | if ((unsigned)(size) > \ |
| 178 | (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \ |
| 179 | goto failed_alloc; \ |
| 180 | ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE); \ |
| 181 | } else { \ |
| 182 | ALLOC(data, size); \ |
| 183 | } \ |
| 184 | if (!data) \ |
| 185 | goto failed_alloc; \ |
| 186 | memcpy(data, src, size); \ |
| 187 | if (padding) \ |
| 188 | memset((uint8_t *)data + size, 0, \ |
| 189 | FF_INPUT_BUFFER_PADDING_SIZE); \ |
| 190 | dst = data; \ |
| 191 | } while (0) |
| 192 | |
| 193 | /* Makes duplicates of data, side_data, but does not copy any other fields */ |
| 194 | static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup) |
| 195 | { |
| 196 | pkt->data = NULL; |
| 197 | pkt->side_data = NULL; |
| 198 | if (pkt->buf) { |
| 199 | AVBufferRef *ref = av_buffer_ref(src->buf); |
| 200 | if (!ref) |
| 201 | return AVERROR(ENOMEM); |
| 202 | pkt->buf = ref; |
| 203 | pkt->data = ref->data; |
| 204 | } else { |
| 205 | DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF); |
| 206 | } |
| 207 | #if FF_API_DESTRUCT_PACKET |
| 208 | FF_DISABLE_DEPRECATION_WARNINGS |
| 209 | pkt->destruct = dummy_destruct_packet; |
| 210 | FF_ENABLE_DEPRECATION_WARNINGS |
| 211 | #endif |
| 212 | if (pkt->side_data_elems && dup) |
| 213 | pkt->side_data = src->side_data; |
| 214 | if (pkt->side_data_elems && !dup) { |
| 215 | return av_copy_packet_side_data(pkt, src); |
| 216 | } |
| 217 | return 0; |
| 218 | |
| 219 | failed_alloc: |
| 220 | av_free_packet(pkt); |
| 221 | return AVERROR(ENOMEM); |
| 222 | } |
| 223 | |
| 224 | int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src) |
| 225 | { |
| 226 | if (src->side_data_elems) { |
| 227 | int i; |
| 228 | DUP_DATA(pkt->side_data, src->side_data, |
| 229 | src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC); |
| 230 | if (src != pkt) { |
| 231 | memset(pkt->side_data, 0, |
| 232 | src->side_data_elems * sizeof(*src->side_data)); |
| 233 | } |
| 234 | for (i = 0; i < src->side_data_elems; i++) { |
| 235 | DUP_DATA(pkt->side_data[i].data, src->side_data[i].data, |
| 236 | src->side_data[i].size, 1, ALLOC_MALLOC); |
| 237 | pkt->side_data[i].size = src->side_data[i].size; |
| 238 | pkt->side_data[i].type = src->side_data[i].type; |
| 239 | } |
| 240 | } |
| 241 | pkt->side_data_elems = src->side_data_elems; |
| 242 | return 0; |
| 243 | |
| 244 | failed_alloc: |
| 245 | av_free_packet(pkt); |
| 246 | return AVERROR(ENOMEM); |
| 247 | } |
| 248 | |
| 249 | int av_dup_packet(AVPacket *pkt) |
| 250 | { |
| 251 | AVPacket tmp_pkt; |
| 252 | |
| 253 | FF_DISABLE_DEPRECATION_WARNINGS |
| 254 | if (!pkt->buf && pkt->data |
| 255 | #if FF_API_DESTRUCT_PACKET |
| 256 | && !pkt->destruct |
| 257 | #endif |
| 258 | ) { |
| 259 | FF_ENABLE_DEPRECATION_WARNINGS |
| 260 | tmp_pkt = *pkt; |
| 261 | return copy_packet_data(pkt, &tmp_pkt, 1); |
| 262 | } |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | int av_copy_packet(AVPacket *dst, const AVPacket *src) |
| 267 | { |
| 268 | *dst = *src; |
| 269 | return copy_packet_data(dst, src, 0); |
| 270 | } |
| 271 | |
| 272 | void av_packet_free_side_data(AVPacket *pkt) |
| 273 | { |
| 274 | int i; |
| 275 | for (i = 0; i < pkt->side_data_elems; i++) |
| 276 | av_free(pkt->side_data[i].data); |
| 277 | av_freep(&pkt->side_data); |
| 278 | pkt->side_data_elems = 0; |
| 279 | } |
| 280 | |
| 281 | void av_free_packet(AVPacket *pkt) |
| 282 | { |
| 283 | if (pkt) { |
| 284 | FF_DISABLE_DEPRECATION_WARNINGS |
| 285 | if (pkt->buf) |
| 286 | av_buffer_unref(&pkt->buf); |
| 287 | #if FF_API_DESTRUCT_PACKET |
| 288 | else if (pkt->destruct) |
| 289 | pkt->destruct(pkt); |
| 290 | pkt->destruct = NULL; |
| 291 | #endif |
| 292 | FF_ENABLE_DEPRECATION_WARNINGS |
| 293 | pkt->data = NULL; |
| 294 | pkt->size = 0; |
| 295 | |
| 296 | av_packet_free_side_data(pkt); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 301 | int size) |
| 302 | { |
| 303 | int elems = pkt->side_data_elems; |
| 304 | |
| 305 | if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) |
| 306 | return NULL; |
| 307 | if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) |
| 308 | return NULL; |
| 309 | |
| 310 | pkt->side_data = av_realloc(pkt->side_data, |
| 311 | (elems + 1) * sizeof(*pkt->side_data)); |
| 312 | if (!pkt->side_data) |
| 313 | return NULL; |
| 314 | |
| 315 | pkt->side_data[elems].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 316 | if (!pkt->side_data[elems].data) |
| 317 | return NULL; |
| 318 | pkt->side_data[elems].size = size; |
| 319 | pkt->side_data[elems].type = type; |
| 320 | pkt->side_data_elems++; |
| 321 | |
| 322 | return pkt->side_data[elems].data; |
| 323 | } |
| 324 | |
| 325 | uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 326 | int *size) |
| 327 | { |
| 328 | int i; |
| 329 | |
| 330 | for (i = 0; i < pkt->side_data_elems; i++) { |
| 331 | if (pkt->side_data[i].type == type) { |
| 332 | if (size) |
| 333 | *size = pkt->side_data[i].size; |
| 334 | return pkt->side_data[i].data; |
| 335 | } |
| 336 | } |
| 337 | return NULL; |
| 338 | } |
| 339 | |
| 340 | #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL |
| 341 | |
| 342 | int av_packet_merge_side_data(AVPacket *pkt){ |
| 343 | if(pkt->side_data_elems){ |
| 344 | AVBufferRef *buf; |
| 345 | int i; |
| 346 | uint8_t *p; |
| 347 | uint64_t size= pkt->size + 8LL + FF_INPUT_BUFFER_PADDING_SIZE; |
| 348 | AVPacket old= *pkt; |
| 349 | for (i=0; i<old.side_data_elems; i++) { |
| 350 | size += old.side_data[i].size + 5LL; |
| 351 | } |
| 352 | if (size > INT_MAX) |
| 353 | return AVERROR(EINVAL); |
| 354 | buf = av_buffer_alloc(size); |
| 355 | if (!buf) |
| 356 | return AVERROR(ENOMEM); |
| 357 | pkt->buf = buf; |
| 358 | pkt->data = p = buf->data; |
| 359 | #if FF_API_DESTRUCT_PACKET |
| 360 | FF_DISABLE_DEPRECATION_WARNINGS |
| 361 | pkt->destruct = dummy_destruct_packet; |
| 362 | FF_ENABLE_DEPRECATION_WARNINGS |
| 363 | #endif |
| 364 | pkt->size = size - FF_INPUT_BUFFER_PADDING_SIZE; |
| 365 | bytestream_put_buffer(&p, old.data, old.size); |
| 366 | for (i=old.side_data_elems-1; i>=0; i--) { |
| 367 | bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size); |
| 368 | bytestream_put_be32(&p, old.side_data[i].size); |
| 369 | *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128); |
| 370 | } |
| 371 | bytestream_put_be64(&p, FF_MERGE_MARKER); |
| 372 | av_assert0(p-pkt->data == pkt->size); |
| 373 | memset(p, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| 374 | av_free_packet(&old); |
| 375 | pkt->side_data_elems = 0; |
| 376 | pkt->side_data = NULL; |
| 377 | return 1; |
| 378 | } |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | int av_packet_split_side_data(AVPacket *pkt){ |
| 383 | if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){ |
| 384 | int i; |
| 385 | unsigned int size; |
| 386 | uint8_t *p; |
| 387 | |
| 388 | p = pkt->data + pkt->size - 8 - 5; |
| 389 | for (i=1; ; i++){ |
| 390 | size = AV_RB32(p); |
| 391 | if (size>INT_MAX || p - pkt->data < size) |
| 392 | return 0; |
| 393 | if (p[4]&128) |
| 394 | break; |
| 395 | p-= size+5; |
| 396 | } |
| 397 | |
| 398 | pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data)); |
| 399 | if (!pkt->side_data) |
| 400 | return AVERROR(ENOMEM); |
| 401 | |
| 402 | p= pkt->data + pkt->size - 8 - 5; |
| 403 | for (i=0; ; i++){ |
| 404 | size= AV_RB32(p); |
| 405 | av_assert0(size<=INT_MAX && p - pkt->data >= size); |
| 406 | pkt->side_data[i].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 407 | pkt->side_data[i].size = size; |
| 408 | pkt->side_data[i].type = p[4]&127; |
| 409 | if (!pkt->side_data[i].data) |
| 410 | return AVERROR(ENOMEM); |
| 411 | memcpy(pkt->side_data[i].data, p-size, size); |
| 412 | pkt->size -= size + 5; |
| 413 | if(p[4]&128) |
| 414 | break; |
| 415 | p-= size+5; |
| 416 | } |
| 417 | pkt->size -= 8; |
| 418 | pkt->side_data_elems = i+1; |
| 419 | return 1; |
| 420 | } |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size) |
| 425 | { |
| 426 | AVDictionaryEntry *t = NULL; |
| 427 | uint8_t *data = NULL; |
| 428 | *size = 0; |
| 429 | |
| 430 | if (!dict) |
| 431 | return NULL; |
| 432 | |
| 433 | while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) { |
| 434 | const size_t keylen = strlen(t->key); |
| 435 | const size_t valuelen = strlen(t->value); |
| 436 | const size_t new_size = *size + keylen + 1 + valuelen + 1; |
| 437 | uint8_t *const new_data = av_realloc(data, new_size); |
| 438 | |
| 439 | if (!new_data) |
| 440 | goto fail; |
| 441 | data = new_data; |
| 442 | if (new_size > INT_MAX) |
| 443 | goto fail; |
| 444 | |
| 445 | memcpy(data + *size, t->key, keylen + 1); |
| 446 | memcpy(data + *size + keylen + 1, t->value, valuelen + 1); |
| 447 | |
| 448 | *size = new_size; |
| 449 | } |
| 450 | |
| 451 | return data; |
| 452 | |
| 453 | fail: |
| 454 | av_freep(&data); |
| 455 | *size = 0; |
| 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict) |
| 460 | { |
| 461 | const uint8_t *end = data + size; |
| 462 | int ret = 0; |
| 463 | |
| 464 | if (!dict || !data || !size) |
| 465 | return ret; |
| 466 | if (size && end[-1]) |
| 467 | return AVERROR_INVALIDDATA; |
| 468 | while (data < end) { |
| 469 | const uint8_t *key = data; |
| 470 | const uint8_t *val = data + strlen(key) + 1; |
| 471 | |
| 472 | if (val >= end) |
| 473 | return AVERROR_INVALIDDATA; |
| 474 | |
| 475 | ret = av_dict_set(dict, key, val, 0); |
| 476 | if (ret < 0) |
| 477 | break; |
| 478 | data = val + strlen(val) + 1; |
| 479 | } |
| 480 | |
| 481 | return ret; |
| 482 | } |
| 483 | |
| 484 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, |
| 485 | int size) |
| 486 | { |
| 487 | int i; |
| 488 | |
| 489 | for (i = 0; i < pkt->side_data_elems; i++) { |
| 490 | if (pkt->side_data[i].type == type) { |
| 491 | if (size > pkt->side_data[i].size) |
| 492 | return AVERROR(ENOMEM); |
| 493 | pkt->side_data[i].size = size; |
| 494 | return 0; |
| 495 | } |
| 496 | } |
| 497 | return AVERROR(ENOENT); |
| 498 | } |
| 499 | |
| 500 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src) |
| 501 | { |
| 502 | int i; |
| 503 | |
| 504 | dst->pts = src->pts; |
| 505 | dst->dts = src->dts; |
| 506 | dst->pos = src->pos; |
| 507 | dst->duration = src->duration; |
| 508 | dst->convergence_duration = src->convergence_duration; |
| 509 | dst->flags = src->flags; |
| 510 | dst->stream_index = src->stream_index; |
| 511 | |
| 512 | for (i = 0; i < src->side_data_elems; i++) { |
| 513 | enum AVPacketSideDataType type = src->side_data[i].type; |
| 514 | int size = src->side_data[i].size; |
| 515 | uint8_t *src_data = src->side_data[i].data; |
| 516 | uint8_t *dst_data = av_packet_new_side_data(dst, type, size); |
| 517 | |
| 518 | if (!dst_data) { |
| 519 | av_packet_free_side_data(dst); |
| 520 | return AVERROR(ENOMEM); |
| 521 | } |
| 522 | memcpy(dst_data, src_data, size); |
| 523 | } |
| 524 | |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | void av_packet_unref(AVPacket *pkt) |
| 529 | { |
| 530 | av_packet_free_side_data(pkt); |
| 531 | av_buffer_unref(&pkt->buf); |
| 532 | av_init_packet(pkt); |
| 533 | pkt->data = NULL; |
| 534 | pkt->size = 0; |
| 535 | } |
| 536 | |
| 537 | int av_packet_ref(AVPacket *dst, const AVPacket *src) |
| 538 | { |
| 539 | int ret; |
| 540 | |
| 541 | ret = av_packet_copy_props(dst, src); |
| 542 | if (ret < 0) |
| 543 | return ret; |
| 544 | |
| 545 | if (!src->buf) { |
| 546 | ret = packet_alloc(&dst->buf, src->size); |
| 547 | if (ret < 0) |
| 548 | goto fail; |
| 549 | memcpy(dst->buf->data, src->data, src->size); |
| 550 | } else |
| 551 | dst->buf = av_buffer_ref(src->buf); |
| 552 | |
| 553 | dst->size = src->size; |
| 554 | dst->data = dst->buf->data; |
| 555 | return 0; |
| 556 | fail: |
| 557 | av_packet_free_side_data(dst); |
| 558 | return ret; |
| 559 | } |
| 560 | |
| 561 | void av_packet_move_ref(AVPacket *dst, AVPacket *src) |
| 562 | { |
| 563 | *dst = *src; |
| 564 | av_init_packet(src); |
| 565 | } |
| 566 | |
| 567 | void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb) |
| 568 | { |
| 569 | if (pkt->pts != AV_NOPTS_VALUE) |
| 570 | pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb); |
| 571 | if (pkt->dts != AV_NOPTS_VALUE) |
| 572 | pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb); |
| 573 | if (pkt->duration > 0) |
| 574 | pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb); |
| 575 | if (pkt->convergence_duration > 0) |
| 576 | pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb); |
| 577 | } |