/libavcodec/avpacket.c

http://github.com/FFmpeg/FFmpeg · C · 772 lines · 637 code · 114 blank · 21 comment · 129 complexity · 375fc9d2ea83e06fe67b9798afb88d65 MD5 · raw file

  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. #include <string.h>
  22. #include "libavutil/avassert.h"
  23. #include "libavutil/common.h"
  24. #include "libavutil/internal.h"
  25. #include "libavutil/mathematics.h"
  26. #include "libavutil/mem.h"
  27. #include "bytestream.h"
  28. #include "internal.h"
  29. #include "packet.h"
  30. void av_init_packet(AVPacket *pkt)
  31. {
  32. pkt->pts = AV_NOPTS_VALUE;
  33. pkt->dts = AV_NOPTS_VALUE;
  34. pkt->pos = -1;
  35. pkt->duration = 0;
  36. #if FF_API_CONVERGENCE_DURATION
  37. FF_DISABLE_DEPRECATION_WARNINGS
  38. pkt->convergence_duration = 0;
  39. FF_ENABLE_DEPRECATION_WARNINGS
  40. #endif
  41. pkt->flags = 0;
  42. pkt->stream_index = 0;
  43. pkt->buf = NULL;
  44. pkt->side_data = NULL;
  45. pkt->side_data_elems = 0;
  46. }
  47. AVPacket *av_packet_alloc(void)
  48. {
  49. AVPacket *pkt = av_mallocz(sizeof(AVPacket));
  50. if (!pkt)
  51. return pkt;
  52. av_init_packet(pkt);
  53. return pkt;
  54. }
  55. void av_packet_free(AVPacket **pkt)
  56. {
  57. if (!pkt || !*pkt)
  58. return;
  59. av_packet_unref(*pkt);
  60. av_freep(pkt);
  61. }
  62. static int packet_alloc(AVBufferRef **buf, int size)
  63. {
  64. int ret;
  65. if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
  66. return AVERROR(EINVAL);
  67. ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
  68. if (ret < 0)
  69. return ret;
  70. memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
  71. return 0;
  72. }
  73. int av_new_packet(AVPacket *pkt, int size)
  74. {
  75. AVBufferRef *buf = NULL;
  76. int ret = packet_alloc(&buf, size);
  77. if (ret < 0)
  78. return ret;
  79. av_init_packet(pkt);
  80. pkt->buf = buf;
  81. pkt->data = buf->data;
  82. pkt->size = size;
  83. return 0;
  84. }
  85. void av_shrink_packet(AVPacket *pkt, int size)
  86. {
  87. if (pkt->size <= size)
  88. return;
  89. pkt->size = size;
  90. memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
  91. }
  92. int av_grow_packet(AVPacket *pkt, int grow_by)
  93. {
  94. int new_size;
  95. av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
  96. if ((unsigned)grow_by >
  97. INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
  98. return AVERROR(ENOMEM);
  99. new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
  100. if (pkt->buf) {
  101. size_t data_offset;
  102. uint8_t *old_data = pkt->data;
  103. if (pkt->data == NULL) {
  104. data_offset = 0;
  105. pkt->data = pkt->buf->data;
  106. } else {
  107. data_offset = pkt->data - pkt->buf->data;
  108. if (data_offset > INT_MAX - new_size)
  109. return AVERROR(ENOMEM);
  110. }
  111. if (new_size + data_offset > pkt->buf->size ||
  112. !av_buffer_is_writable(pkt->buf)) {
  113. int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
  114. if (ret < 0) {
  115. pkt->data = old_data;
  116. return ret;
  117. }
  118. pkt->data = pkt->buf->data + data_offset;
  119. }
  120. } else {
  121. pkt->buf = av_buffer_alloc(new_size);
  122. if (!pkt->buf)
  123. return AVERROR(ENOMEM);
  124. if (pkt->size > 0)
  125. memcpy(pkt->buf->data, pkt->data, pkt->size);
  126. pkt->data = pkt->buf->data;
  127. }
  128. pkt->size += grow_by;
  129. memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
  130. return 0;
  131. }
  132. int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
  133. {
  134. if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
  135. return AVERROR(EINVAL);
  136. pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
  137. av_buffer_default_free, NULL, 0);
  138. if (!pkt->buf)
  139. return AVERROR(ENOMEM);
  140. pkt->data = data;
  141. pkt->size = size;
  142. return 0;
  143. }
  144. #if FF_API_AVPACKET_OLD_API
  145. FF_DISABLE_DEPRECATION_WARNINGS
  146. #define ALLOC_MALLOC(data, size) data = av_malloc(size)
  147. #define ALLOC_BUF(data, size) \
  148. do { \
  149. av_buffer_realloc(&pkt->buf, size); \
  150. data = pkt->buf ? pkt->buf->data : NULL; \
  151. } while (0)
  152. #define DUP_DATA(dst, src, size, padding, ALLOC) \
  153. do { \
  154. void *data; \
  155. if (padding) { \
  156. if ((unsigned)(size) > \
  157. (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
  158. goto failed_alloc; \
  159. ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
  160. } else { \
  161. ALLOC(data, size); \
  162. } \
  163. if (!data) \
  164. goto failed_alloc; \
  165. memcpy(data, src, size); \
  166. if (padding) \
  167. memset((uint8_t *)data + size, 0, \
  168. AV_INPUT_BUFFER_PADDING_SIZE); \
  169. dst = data; \
  170. } while (0)
  171. /* Makes duplicates of data, side_data, but does not copy any other fields */
  172. static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
  173. {
  174. pkt->data = NULL;
  175. pkt->side_data = NULL;
  176. pkt->side_data_elems = 0;
  177. if (pkt->buf) {
  178. AVBufferRef *ref = av_buffer_ref(src->buf);
  179. if (!ref)
  180. return AVERROR(ENOMEM);
  181. pkt->buf = ref;
  182. pkt->data = ref->data;
  183. } else {
  184. DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
  185. }
  186. if (src->side_data_elems && dup) {
  187. pkt->side_data = src->side_data;
  188. pkt->side_data_elems = src->side_data_elems;
  189. }
  190. if (src->side_data_elems && !dup) {
  191. return av_copy_packet_side_data(pkt, src);
  192. }
  193. return 0;
  194. failed_alloc:
  195. av_packet_unref(pkt);
  196. return AVERROR(ENOMEM);
  197. }
  198. int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
  199. {
  200. if (src->side_data_elems) {
  201. int i;
  202. DUP_DATA(pkt->side_data, src->side_data,
  203. src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC);
  204. if (src != pkt) {
  205. memset(pkt->side_data, 0,
  206. src->side_data_elems * sizeof(*src->side_data));
  207. }
  208. for (i = 0; i < src->side_data_elems; i++) {
  209. DUP_DATA(pkt->side_data[i].data, src->side_data[i].data,
  210. src->side_data[i].size, 1, ALLOC_MALLOC);
  211. pkt->side_data[i].size = src->side_data[i].size;
  212. pkt->side_data[i].type = src->side_data[i].type;
  213. }
  214. }
  215. pkt->side_data_elems = src->side_data_elems;
  216. return 0;
  217. failed_alloc:
  218. av_packet_unref(pkt);
  219. return AVERROR(ENOMEM);
  220. }
  221. int av_dup_packet(AVPacket *pkt)
  222. {
  223. AVPacket tmp_pkt;
  224. if (!pkt->buf && pkt->data) {
  225. tmp_pkt = *pkt;
  226. return copy_packet_data(pkt, &tmp_pkt, 1);
  227. }
  228. return 0;
  229. }
  230. int av_copy_packet(AVPacket *dst, const AVPacket *src)
  231. {
  232. *dst = *src;
  233. return copy_packet_data(dst, src, 0);
  234. }
  235. FF_ENABLE_DEPRECATION_WARNINGS
  236. #endif
  237. void av_packet_free_side_data(AVPacket *pkt)
  238. {
  239. int i;
  240. for (i = 0; i < pkt->side_data_elems; i++)
  241. av_freep(&pkt->side_data[i].data);
  242. av_freep(&pkt->side_data);
  243. pkt->side_data_elems = 0;
  244. }
  245. #if FF_API_AVPACKET_OLD_API
  246. FF_DISABLE_DEPRECATION_WARNINGS
  247. void av_free_packet(AVPacket *pkt)
  248. {
  249. if (pkt) {
  250. if (pkt->buf)
  251. av_buffer_unref(&pkt->buf);
  252. pkt->data = NULL;
  253. pkt->size = 0;
  254. av_packet_free_side_data(pkt);
  255. }
  256. }
  257. FF_ENABLE_DEPRECATION_WARNINGS
  258. #endif
  259. int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
  260. uint8_t *data, size_t size)
  261. {
  262. AVPacketSideData *tmp;
  263. int i, elems = pkt->side_data_elems;
  264. for (i = 0; i < elems; i++) {
  265. AVPacketSideData *sd = &pkt->side_data[i];
  266. if (sd->type == type) {
  267. av_free(sd->data);
  268. sd->data = data;
  269. sd->size = size;
  270. return 0;
  271. }
  272. }
  273. if ((unsigned)elems + 1 > AV_PKT_DATA_NB)
  274. return AVERROR(ERANGE);
  275. tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
  276. if (!tmp)
  277. return AVERROR(ENOMEM);
  278. pkt->side_data = tmp;
  279. pkt->side_data[elems].data = data;
  280. pkt->side_data[elems].size = size;
  281. pkt->side_data[elems].type = type;
  282. pkt->side_data_elems++;
  283. return 0;
  284. }
  285. uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
  286. int size)
  287. {
  288. int ret;
  289. uint8_t *data;
  290. if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
  291. return NULL;
  292. data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
  293. if (!data)
  294. return NULL;
  295. ret = av_packet_add_side_data(pkt, type, data, size);
  296. if (ret < 0) {
  297. av_freep(&data);
  298. return NULL;
  299. }
  300. return data;
  301. }
  302. uint8_t *av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
  303. int *size)
  304. {
  305. int i;
  306. for (i = 0; i < pkt->side_data_elems; i++) {
  307. if (pkt->side_data[i].type == type) {
  308. if (size)
  309. *size = pkt->side_data[i].size;
  310. return pkt->side_data[i].data;
  311. }
  312. }
  313. if (size)
  314. *size = 0;
  315. return NULL;
  316. }
  317. const char *av_packet_side_data_name(enum AVPacketSideDataType type)
  318. {
  319. switch(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_QUALITY_STATS: return "Quality stats";
  329. case AV_PKT_DATA_FALLBACK_TRACK: return "Fallback track";
  330. case AV_PKT_DATA_CPB_PROPERTIES: return "CPB properties";
  331. case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
  332. case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
  333. case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
  334. case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
  335. case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
  336. case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
  337. case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
  338. case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
  339. case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
  340. case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
  341. case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
  342. case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
  343. case AV_PKT_DATA_A53_CC: return "A53 Closed Captions";
  344. case AV_PKT_DATA_ENCRYPTION_INIT_INFO: return "Encryption initialization data";
  345. case AV_PKT_DATA_ENCRYPTION_INFO: return "Encryption info";
  346. case AV_PKT_DATA_AFD: return "Active Format Description data";
  347. case AV_PKT_DATA_PRFT: return "Producer Reference Time";
  348. case AV_PKT_DATA_ICC_PROFILE: return "ICC Profile";
  349. case AV_PKT_DATA_DOVI_CONF: return "DOVI configuration record";
  350. }
  351. return NULL;
  352. }
  353. #if FF_API_MERGE_SD_API
  354. #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
  355. int av_packet_merge_side_data(AVPacket *pkt){
  356. if(pkt->side_data_elems){
  357. AVBufferRef *buf;
  358. int i;
  359. uint8_t *p;
  360. uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
  361. AVPacket old= *pkt;
  362. for (i=0; i<old.side_data_elems; i++) {
  363. size += old.side_data[i].size + 5LL;
  364. }
  365. if (size > INT_MAX)
  366. return AVERROR(EINVAL);
  367. buf = av_buffer_alloc(size);
  368. if (!buf)
  369. return AVERROR(ENOMEM);
  370. pkt->buf = buf;
  371. pkt->data = p = buf->data;
  372. pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
  373. bytestream_put_buffer(&p, old.data, old.size);
  374. for (i=old.side_data_elems-1; i>=0; i--) {
  375. bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
  376. bytestream_put_be32(&p, old.side_data[i].size);
  377. *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
  378. }
  379. bytestream_put_be64(&p, FF_MERGE_MARKER);
  380. av_assert0(p-pkt->data == pkt->size);
  381. memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
  382. av_packet_unref(&old);
  383. pkt->side_data_elems = 0;
  384. pkt->side_data = NULL;
  385. return 1;
  386. }
  387. return 0;
  388. }
  389. int av_packet_split_side_data(AVPacket *pkt){
  390. if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
  391. int i;
  392. unsigned int size;
  393. uint8_t *p;
  394. p = pkt->data + pkt->size - 8 - 5;
  395. for (i=1; ; i++){
  396. size = AV_RB32(p);
  397. if (size>INT_MAX - 5 || p - pkt->data < size)
  398. return 0;
  399. if (p[4]&128)
  400. break;
  401. if (p - pkt->data < size + 5)
  402. return 0;
  403. p-= size+5;
  404. }
  405. if (i > AV_PKT_DATA_NB)
  406. return AVERROR(ERANGE);
  407. pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
  408. if (!pkt->side_data)
  409. return AVERROR(ENOMEM);
  410. p= pkt->data + pkt->size - 8 - 5;
  411. for (i=0; ; i++){
  412. size= AV_RB32(p);
  413. av_assert0(size<=INT_MAX - 5 && p - pkt->data >= size);
  414. pkt->side_data[i].data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
  415. pkt->side_data[i].size = size;
  416. pkt->side_data[i].type = p[4]&127;
  417. if (!pkt->side_data[i].data)
  418. return AVERROR(ENOMEM);
  419. memcpy(pkt->side_data[i].data, p-size, size);
  420. pkt->size -= size + 5;
  421. if(p[4]&128)
  422. break;
  423. p-= size+5;
  424. }
  425. pkt->size -= 8;
  426. pkt->side_data_elems = i+1;
  427. return 1;
  428. }
  429. return 0;
  430. }
  431. #endif
  432. uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
  433. {
  434. AVDictionaryEntry *t = NULL;
  435. uint8_t *data = NULL;
  436. *size = 0;
  437. if (!dict)
  438. return NULL;
  439. while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
  440. const size_t keylen = strlen(t->key);
  441. const size_t valuelen = strlen(t->value);
  442. const size_t new_size = *size + keylen + 1 + valuelen + 1;
  443. uint8_t *const new_data = av_realloc(data, new_size);
  444. if (!new_data)
  445. goto fail;
  446. data = new_data;
  447. if (new_size > INT_MAX)
  448. goto fail;
  449. memcpy(data + *size, t->key, keylen + 1);
  450. memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
  451. *size = new_size;
  452. }
  453. return data;
  454. fail:
  455. av_freep(&data);
  456. *size = 0;
  457. return NULL;
  458. }
  459. int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
  460. {
  461. const uint8_t *end;
  462. int ret;
  463. if (!dict || !data || !size)
  464. return 0;
  465. end = data + size;
  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. if (val >= end || !*key)
  472. return AVERROR_INVALIDDATA;
  473. ret = av_dict_set(dict, key, val, 0);
  474. if (ret < 0)
  475. return ret;
  476. data = val + strlen(val) + 1;
  477. }
  478. return 0;
  479. }
  480. int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
  481. int size)
  482. {
  483. int i;
  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;
  489. return 0;
  490. }
  491. }
  492. return AVERROR(ENOENT);
  493. }
  494. int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
  495. {
  496. int i;
  497. dst->pts = src->pts;
  498. dst->dts = src->dts;
  499. dst->pos = src->pos;
  500. dst->duration = src->duration;
  501. #if FF_API_CONVERGENCE_DURATION
  502. FF_DISABLE_DEPRECATION_WARNINGS
  503. dst->convergence_duration = src->convergence_duration;
  504. FF_ENABLE_DEPRECATION_WARNINGS
  505. #endif
  506. dst->flags = src->flags;
  507. dst->stream_index = src->stream_index;
  508. dst->side_data = NULL;
  509. dst->side_data_elems = 0;
  510. for (i = 0; i < src->side_data_elems; i++) {
  511. enum AVPacketSideDataType type = src->side_data[i].type;
  512. int size = src->side_data[i].size;
  513. uint8_t *src_data = src->side_data[i].data;
  514. uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
  515. if (!dst_data) {
  516. av_packet_free_side_data(dst);
  517. return AVERROR(ENOMEM);
  518. }
  519. memcpy(dst_data, src_data, size);
  520. }
  521. return 0;
  522. }
  523. void av_packet_unref(AVPacket *pkt)
  524. {
  525. av_packet_free_side_data(pkt);
  526. av_buffer_unref(&pkt->buf);
  527. av_init_packet(pkt);
  528. pkt->data = NULL;
  529. pkt->size = 0;
  530. }
  531. int av_packet_ref(AVPacket *dst, const AVPacket *src)
  532. {
  533. int ret;
  534. dst->buf = NULL;
  535. ret = av_packet_copy_props(dst, src);
  536. if (ret < 0)
  537. goto fail;
  538. if (!src->buf) {
  539. ret = packet_alloc(&dst->buf, src->size);
  540. if (ret < 0)
  541. goto fail;
  542. av_assert1(!src->size || src->data);
  543. if (src->size)
  544. memcpy(dst->buf->data, src->data, src->size);
  545. dst->data = dst->buf->data;
  546. } else {
  547. dst->buf = av_buffer_ref(src->buf);
  548. if (!dst->buf) {
  549. ret = AVERROR(ENOMEM);
  550. goto fail;
  551. }
  552. dst->data = src->data;
  553. }
  554. dst->size = src->size;
  555. return 0;
  556. fail:
  557. av_packet_unref(dst);
  558. return ret;
  559. }
  560. AVPacket *av_packet_clone(const AVPacket *src)
  561. {
  562. AVPacket *ret = av_packet_alloc();
  563. if (!ret)
  564. return ret;
  565. if (av_packet_ref(ret, src))
  566. av_packet_free(&ret);
  567. return ret;
  568. }
  569. void av_packet_move_ref(AVPacket *dst, AVPacket *src)
  570. {
  571. *dst = *src;
  572. av_init_packet(src);
  573. src->data = NULL;
  574. src->size = 0;
  575. }
  576. int av_packet_make_refcounted(AVPacket *pkt)
  577. {
  578. int ret;
  579. if (pkt->buf)
  580. return 0;
  581. ret = packet_alloc(&pkt->buf, pkt->size);
  582. if (ret < 0)
  583. return ret;
  584. av_assert1(!pkt->size || pkt->data);
  585. if (pkt->size)
  586. memcpy(pkt->buf->data, pkt->data, pkt->size);
  587. pkt->data = pkt->buf->data;
  588. return 0;
  589. }
  590. int av_packet_make_writable(AVPacket *pkt)
  591. {
  592. AVBufferRef *buf = NULL;
  593. int ret;
  594. if (pkt->buf && av_buffer_is_writable(pkt->buf))
  595. return 0;
  596. ret = packet_alloc(&buf, pkt->size);
  597. if (ret < 0)
  598. return ret;
  599. av_assert1(!pkt->size || pkt->data);
  600. if (pkt->size)
  601. memcpy(buf->data, pkt->data, pkt->size);
  602. av_buffer_unref(&pkt->buf);
  603. pkt->buf = buf;
  604. pkt->data = buf->data;
  605. return 0;
  606. }
  607. void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
  608. {
  609. if (pkt->pts != AV_NOPTS_VALUE)
  610. pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
  611. if (pkt->dts != AV_NOPTS_VALUE)
  612. pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
  613. if (pkt->duration > 0)
  614. pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
  615. #if FF_API_CONVERGENCE_DURATION
  616. FF_DISABLE_DEPRECATION_WARNINGS
  617. if (pkt->convergence_duration > 0)
  618. pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
  619. FF_ENABLE_DEPRECATION_WARNINGS
  620. #endif
  621. }
  622. int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
  623. {
  624. uint8_t *side_data;
  625. int side_data_size;
  626. int i;
  627. side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
  628. if (!side_data) {
  629. side_data_size = 4+4+8*error_count;
  630. side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
  631. side_data_size);
  632. }
  633. if (!side_data || side_data_size < 4+4+8*error_count)
  634. return AVERROR(ENOMEM);
  635. AV_WL32(side_data , quality );
  636. side_data[4] = pict_type;
  637. side_data[5] = error_count;
  638. for (i = 0; i<error_count; i++)
  639. AV_WL64(side_data+8 + 8*i , error[i]);
  640. return 0;
  641. }
  642. int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp)
  643. {
  644. AVProducerReferenceTime *prft;
  645. uint8_t *side_data;
  646. int side_data_size;
  647. side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
  648. if (!side_data) {
  649. side_data_size = sizeof(AVProducerReferenceTime);
  650. side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT, side_data_size);
  651. }
  652. if (!side_data || side_data_size < sizeof(AVProducerReferenceTime))
  653. return AVERROR(ENOMEM);
  654. prft = (AVProducerReferenceTime *)side_data;
  655. prft->wallclock = timestamp;
  656. prft->flags = 0;
  657. return 0;
  658. }