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  1. /*
  2. * "Real" compatible demuxer.
  3. * Copyright (c) 2000, 2001 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 <inttypes.h>
  22. #include "libavutil/avassert.h"
  23. #include "libavutil/avstring.h"
  24. #include "libavutil/channel_layout.h"
  25. #include "libavutil/internal.h"
  26. #include "libavutil/intreadwrite.h"
  27. #include "libavutil/dict.h"
  28. #include "avformat.h"
  29. #include "avio_internal.h"
  30. #include "internal.h"
  31. #include "rmsipr.h"
  32. #include "rm.h"
  33. #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/ATRAC
  34. #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
  35. #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
  36. #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
  37. #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
  38. #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
  39. struct RMStream {
  40. AVPacket pkt; ///< place to store merged video frame / reordered audio data
  41. int videobufsize; ///< current assembled frame size
  42. int videobufpos; ///< position for the next slice in the video buffer
  43. int curpic_num; ///< picture number of current frame
  44. int cur_slice, slices;
  45. int64_t pktpos; ///< first slice position in file
  46. /// Audio descrambling matrix parameters
  47. int64_t audiotimestamp; ///< Audio packet timestamp
  48. int sub_packet_cnt; // Subpacket counter, used while reading
  49. int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
  50. int audio_framesize; /// Audio frame size from container
  51. int sub_packet_lengths[16]; /// Length of each subpacket
  52. int32_t deint_id; ///< deinterleaver used in audio stream
  53. };
  54. typedef struct RMDemuxContext {
  55. int nb_packets;
  56. int old_format;
  57. int current_stream;
  58. int remaining_len;
  59. int audio_stream_num; ///< Stream number for audio packets
  60. int audio_pkt_cnt; ///< Output packet counter
  61. int data_end;
  62. } RMDemuxContext;
  63. static int rm_read_close(AVFormatContext *s);
  64. static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
  65. {
  66. int read = avio_get_str(pb, len, buf, buf_size);
  67. if (read > 0)
  68. avio_skip(pb, len - read);
  69. }
  70. static void get_str8(AVIOContext *pb, char *buf, int buf_size)
  71. {
  72. get_strl(pb, buf, buf_size, avio_r8(pb));
  73. }
  74. static int rm_read_extradata(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, unsigned size)
  75. {
  76. if (size >= 1<<24) {
  77. av_log(s, AV_LOG_ERROR, "extradata size %u too large\n", size);
  78. return -1;
  79. }
  80. if (ff_get_extradata(s, par, pb, size) < 0)
  81. return AVERROR(ENOMEM);
  82. return 0;
  83. }
  84. static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
  85. {
  86. char buf[1024];
  87. int i;
  88. for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
  89. int len = wide ? avio_rb16(pb) : avio_r8(pb);
  90. if (len > 0) {
  91. get_strl(pb, buf, sizeof(buf), len);
  92. av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
  93. }
  94. }
  95. }
  96. RMStream *ff_rm_alloc_rmstream (void)
  97. {
  98. RMStream *rms = av_mallocz(sizeof(RMStream));
  99. if (!rms)
  100. return NULL;
  101. rms->curpic_num = -1;
  102. return rms;
  103. }
  104. void ff_rm_free_rmstream (RMStream *rms)
  105. {
  106. av_packet_unref(&rms->pkt);
  107. }
  108. static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
  109. AVStream *st, RMStream *ast, int read_all)
  110. {
  111. char buf[256];
  112. uint32_t version;
  113. int ret;
  114. /* ra type header */
  115. version = avio_rb16(pb); /* version */
  116. if (version == 3) {
  117. unsigned bytes_per_minute;
  118. int header_size = avio_rb16(pb);
  119. int64_t startpos = avio_tell(pb);
  120. avio_skip(pb, 8);
  121. bytes_per_minute = avio_rb16(pb);
  122. avio_skip(pb, 4);
  123. rm_read_metadata(s, pb, 0);
  124. if ((startpos + header_size) >= avio_tell(pb) + 2) {
  125. // fourcc (should always be "lpcJ")
  126. avio_r8(pb);
  127. get_str8(pb, buf, sizeof(buf));
  128. }
  129. // Skip extra header crap (this should never happen)
  130. if ((startpos + header_size) > avio_tell(pb))
  131. avio_skip(pb, header_size + startpos - avio_tell(pb));
  132. if (bytes_per_minute)
  133. st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
  134. st->codecpar->sample_rate = 8000;
  135. st->codecpar->channels = 1;
  136. st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
  137. st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
  138. st->codecpar->codec_id = AV_CODEC_ID_RA_144;
  139. ast->deint_id = DEINT_ID_INT0;
  140. } else {
  141. int flavor, sub_packet_h, coded_framesize, sub_packet_size;
  142. int codecdata_length;
  143. unsigned bytes_per_minute;
  144. /* old version (4) */
  145. avio_skip(pb, 2); /* unused */
  146. avio_rb32(pb); /* .ra4 */
  147. avio_rb32(pb); /* data size */
  148. avio_rb16(pb); /* version2 */
  149. avio_rb32(pb); /* header size */
  150. flavor= avio_rb16(pb); /* add codec info / flavor */
  151. ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
  152. avio_rb32(pb); /* ??? */
  153. bytes_per_minute = avio_rb32(pb);
  154. if (version == 4) {
  155. if (bytes_per_minute)
  156. st->codecpar->bit_rate = 8LL * bytes_per_minute / 60;
  157. }
  158. avio_rb32(pb); /* ??? */
  159. ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
  160. st->codecpar->block_align= avio_rb16(pb); /* frame size */
  161. ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
  162. avio_rb16(pb); /* ??? */
  163. if (version == 5) {
  164. avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
  165. }
  166. st->codecpar->sample_rate = avio_rb16(pb);
  167. avio_rb32(pb);
  168. st->codecpar->channels = avio_rb16(pb);
  169. if (version == 5) {
  170. ast->deint_id = avio_rl32(pb);
  171. avio_read(pb, buf, 4);
  172. buf[4] = 0;
  173. } else {
  174. AV_WL32(buf, 0);
  175. get_str8(pb, buf, sizeof(buf)); /* desc */
  176. ast->deint_id = AV_RL32(buf);
  177. get_str8(pb, buf, sizeof(buf)); /* desc */
  178. }
  179. st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
  180. st->codecpar->codec_tag = AV_RL32(buf);
  181. st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
  182. st->codecpar->codec_tag);
  183. switch (st->codecpar->codec_id) {
  184. case AV_CODEC_ID_AC3:
  185. st->need_parsing = AVSTREAM_PARSE_FULL;
  186. break;
  187. case AV_CODEC_ID_RA_288:
  188. st->codecpar->extradata_size= 0;
  189. av_freep(&st->codecpar->extradata);
  190. ast->audio_framesize = st->codecpar->block_align;
  191. st->codecpar->block_align = coded_framesize;
  192. break;
  193. case AV_CODEC_ID_COOK:
  194. st->need_parsing = AVSTREAM_PARSE_HEADERS;
  195. case AV_CODEC_ID_ATRAC3:
  196. case AV_CODEC_ID_SIPR:
  197. if (read_all) {
  198. codecdata_length = 0;
  199. } else {
  200. avio_rb16(pb); avio_r8(pb);
  201. if (version == 5)
  202. avio_r8(pb);
  203. codecdata_length = avio_rb32(pb);
  204. if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
  205. av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
  206. return -1;
  207. }
  208. }
  209. ast->audio_framesize = st->codecpar->block_align;
  210. if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
  211. if (flavor > 3) {
  212. av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
  213. flavor);
  214. return -1;
  215. }
  216. st->codecpar->block_align = ff_sipr_subpk_size[flavor];
  217. st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
  218. } else {
  219. if(sub_packet_size <= 0){
  220. av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
  221. return -1;
  222. }
  223. st->codecpar->block_align = ast->sub_packet_size;
  224. }
  225. if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length)) < 0)
  226. return ret;
  227. break;
  228. case AV_CODEC_ID_AAC:
  229. avio_rb16(pb); avio_r8(pb);
  230. if (version == 5)
  231. avio_r8(pb);
  232. codecdata_length = avio_rb32(pb);
  233. if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
  234. av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
  235. return -1;
  236. }
  237. if (codecdata_length >= 1) {
  238. avio_r8(pb);
  239. if ((ret = rm_read_extradata(s, pb, st->codecpar, codecdata_length - 1)) < 0)
  240. return ret;
  241. }
  242. break;
  243. }
  244. switch (ast->deint_id) {
  245. case DEINT_ID_INT4:
  246. if (ast->coded_framesize > ast->audio_framesize ||
  247. sub_packet_h <= 1 ||
  248. ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
  249. return AVERROR_INVALIDDATA;
  250. if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {
  251. avpriv_request_sample(s, "mismatching interleaver parameters");
  252. return AVERROR_INVALIDDATA;
  253. }
  254. break;
  255. case DEINT_ID_GENR:
  256. if (ast->sub_packet_size <= 0 ||
  257. ast->sub_packet_size > ast->audio_framesize)
  258. return AVERROR_INVALIDDATA;
  259. if (ast->audio_framesize % ast->sub_packet_size)
  260. return AVERROR_INVALIDDATA;
  261. break;
  262. case DEINT_ID_SIPR:
  263. case DEINT_ID_INT0:
  264. case DEINT_ID_VBRS:
  265. case DEINT_ID_VBRF:
  266. break;
  267. default:
  268. av_log(s, AV_LOG_ERROR ,"Unknown interleaver %"PRIX32"\n", ast->deint_id);
  269. return AVERROR_INVALIDDATA;
  270. }
  271. if (ast->deint_id == DEINT_ID_INT4 ||
  272. ast->deint_id == DEINT_ID_GENR ||
  273. ast->deint_id == DEINT_ID_SIPR) {
  274. if (st->codecpar->block_align <= 0 ||
  275. ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
  276. ast->audio_framesize * sub_packet_h < st->codecpar->block_align)
  277. return AVERROR_INVALIDDATA;
  278. if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
  279. return AVERROR(ENOMEM);
  280. }
  281. if (read_all) {
  282. avio_r8(pb);
  283. avio_r8(pb);
  284. avio_r8(pb);
  285. rm_read_metadata(s, pb, 0);
  286. }
  287. }
  288. return 0;
  289. }
  290. int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,
  291. AVStream *st, RMStream *rst,
  292. unsigned int codec_data_size, const uint8_t *mime)
  293. {
  294. unsigned int v;
  295. int size;
  296. int64_t codec_pos;
  297. int ret;
  298. if (codec_data_size > INT_MAX)
  299. return AVERROR_INVALIDDATA;
  300. if (codec_data_size == 0)
  301. return 0;
  302. avpriv_set_pts_info(st, 64, 1, 1000);
  303. codec_pos = avio_tell(pb);
  304. v = avio_rb32(pb);
  305. if (v == MKTAG(0xfd, 'a', 'r', '.')) {
  306. /* ra type header */
  307. if (rm_read_audio_stream_info(s, pb, st, rst, 0))
  308. return -1;
  309. } else if (v == MKBETAG('L', 'S', 'D', ':')) {
  310. avio_seek(pb, -4, SEEK_CUR);
  311. if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size)) < 0)
  312. return ret;
  313. st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
  314. st->codecpar->codec_tag = AV_RL32(st->codecpar->extradata);
  315. st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
  316. st->codecpar->codec_tag);
  317. } else if(mime && !strcmp(mime, "logical-fileinfo")){
  318. int stream_count, rule_count, property_count, i;
  319. ff_free_stream(s, st);
  320. if (avio_rb16(pb) != 0) {
  321. av_log(s, AV_LOG_WARNING, "Unsupported version\n");
  322. goto skip;
  323. }
  324. stream_count = avio_rb16(pb);
  325. avio_skip(pb, 6*stream_count);
  326. rule_count = avio_rb16(pb);
  327. avio_skip(pb, 2*rule_count);
  328. property_count = avio_rb16(pb);
  329. for(i=0; i<property_count; i++){
  330. uint8_t name[128], val[128];
  331. avio_rb32(pb);
  332. if (avio_rb16(pb) != 0) {
  333. av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
  334. goto skip; //FIXME skip just this one
  335. }
  336. get_str8(pb, name, sizeof(name));
  337. switch(avio_rb32(pb)) {
  338. case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
  339. av_dict_set(&s->metadata, name, val, 0);
  340. break;
  341. default: avio_skip(pb, avio_rb16(pb));
  342. }
  343. }
  344. } else {
  345. int fps;
  346. if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
  347. fail1:
  348. av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
  349. goto skip;
  350. }
  351. st->codecpar->codec_tag = avio_rl32(pb);
  352. st->codecpar->codec_id = ff_codec_get_id(ff_rm_codec_tags,
  353. st->codecpar->codec_tag);
  354. av_log(s, AV_LOG_TRACE, "%"PRIX32" %X\n",
  355. st->codecpar->codec_tag, MKTAG('R', 'V', '2', '0'));
  356. if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
  357. goto fail1;
  358. st->codecpar->width = avio_rb16(pb);
  359. st->codecpar->height = avio_rb16(pb);
  360. avio_skip(pb, 2); // looks like bits per sample
  361. avio_skip(pb, 4); // always zero?
  362. st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
  363. st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
  364. fps = avio_rb32(pb);
  365. if ((ret = rm_read_extradata(s, pb, st->codecpar, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
  366. return ret;
  367. if (fps > 0) {
  368. av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
  369. 0x10000, fps, (1 << 30) - 1);
  370. #if FF_API_R_FRAME_RATE
  371. st->r_frame_rate = st->avg_frame_rate;
  372. #endif
  373. } else if (s->error_recognition & AV_EF_EXPLODE) {
  374. av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
  375. return AVERROR_INVALIDDATA;
  376. }
  377. }
  378. skip:
  379. /* skip codec info */
  380. size = avio_tell(pb) - codec_pos;
  381. if (codec_data_size >= size) {
  382. avio_skip(pb, codec_data_size - size);
  383. } else {
  384. av_log(s, AV_LOG_WARNING, "codec_data_size %u < size %d\n", codec_data_size, size);
  385. }
  386. return 0;
  387. }
  388. /** this function assumes that the demuxer has already seeked to the start
  389. * of the INDX chunk, and will bail out if not. */
  390. static int rm_read_index(AVFormatContext *s)
  391. {
  392. AVIOContext *pb = s->pb;
  393. unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
  394. AVStream *st;
  395. do {
  396. if (avio_rl32(pb) != MKTAG('I','N','D','X'))
  397. return -1;
  398. size = avio_rb32(pb);
  399. if (size < 20)
  400. return -1;
  401. avio_skip(pb, 2);
  402. n_pkts = avio_rb32(pb);
  403. str_id = avio_rb16(pb);
  404. next_off = avio_rb32(pb);
  405. for (n = 0; n < s->nb_streams; n++)
  406. if (s->streams[n]->id == str_id) {
  407. st = s->streams[n];
  408. break;
  409. }
  410. if (n == s->nb_streams) {
  411. av_log(s, AV_LOG_ERROR,
  412. "Invalid stream index %d for index at pos %"PRId64"\n",
  413. str_id, avio_tell(pb));
  414. goto skip;
  415. } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
  416. av_log(s, AV_LOG_ERROR,
  417. "Nr. of packets in packet index for stream index %d "
  418. "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
  419. str_id, avio_size(pb), avio_tell(pb),
  420. (avio_size(pb) - avio_tell(pb)) / 14);
  421. goto skip;
  422. }
  423. for (n = 0; n < n_pkts; n++) {
  424. avio_skip(pb, 2);
  425. pts = avio_rb32(pb);
  426. pos = avio_rb32(pb);
  427. avio_skip(pb, 4); /* packet no. */
  428. av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
  429. }
  430. skip:
  431. if (next_off && avio_tell(pb) < next_off &&
  432. avio_seek(pb, next_off, SEEK_SET) < 0) {
  433. av_log(s, AV_LOG_ERROR,
  434. "Non-linear index detected, not supported\n");
  435. return -1;
  436. }
  437. } while (next_off);
  438. return 0;
  439. }
  440. static int rm_read_header_old(AVFormatContext *s)
  441. {
  442. RMDemuxContext *rm = s->priv_data;
  443. AVStream *st;
  444. rm->old_format = 1;
  445. st = avformat_new_stream(s, NULL);
  446. if (!st)
  447. return -1;
  448. st->priv_data = ff_rm_alloc_rmstream();
  449. if (!st->priv_data)
  450. return AVERROR(ENOMEM);
  451. return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
  452. }
  453. static int rm_read_multi(AVFormatContext *s, AVIOContext *pb,
  454. AVStream *st, char *mime)
  455. {
  456. int number_of_streams = avio_rb16(pb);
  457. int number_of_mdpr;
  458. int i, ret;
  459. unsigned size2;
  460. for (i = 0; i<number_of_streams; i++)
  461. avio_rb16(pb);
  462. number_of_mdpr = avio_rb16(pb);
  463. if (number_of_mdpr != 1) {
  464. avpriv_request_sample(s, "MLTI with multiple (%d) MDPR", number_of_mdpr);
  465. }
  466. for (i = 0; i < number_of_mdpr; i++) {
  467. AVStream *st2;
  468. if (i > 0) {
  469. st2 = avformat_new_stream(s, NULL);
  470. if (!st2) {
  471. ret = AVERROR(ENOMEM);
  472. return ret;
  473. }
  474. st2->id = st->id + (i<<16);
  475. st2->codecpar->bit_rate = st->codecpar->bit_rate;
  476. st2->start_time = st->start_time;
  477. st2->duration = st->duration;
  478. st2->codecpar->codec_type = AVMEDIA_TYPE_DATA;
  479. st2->priv_data = ff_rm_alloc_rmstream();
  480. if (!st2->priv_data)
  481. return AVERROR(ENOMEM);
  482. } else
  483. st2 = st;
  484. size2 = avio_rb32(pb);
  485. ret = ff_rm_read_mdpr_codecdata(s, s->pb, st2, st2->priv_data,
  486. size2, NULL);
  487. if (ret < 0)
  488. return ret;
  489. }
  490. return 0;
  491. }
  492. static int rm_read_header(AVFormatContext *s)
  493. {
  494. RMDemuxContext *rm = s->priv_data;
  495. AVStream *st;
  496. AVIOContext *pb = s->pb;
  497. unsigned int tag;
  498. int tag_size;
  499. unsigned int start_time, duration;
  500. unsigned int data_off = 0, indx_off = 0;
  501. char buf[128], mime[128];
  502. int flags = 0;
  503. int ret = -1;
  504. unsigned size, v;
  505. int64_t codec_pos;
  506. tag = avio_rl32(pb);
  507. if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
  508. /* very old .ra format */
  509. return rm_read_header_old(s);
  510. } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
  511. return AVERROR(EIO);
  512. }
  513. tag_size = avio_rb32(pb);
  514. avio_skip(pb, tag_size - 8);
  515. for(;;) {
  516. if (avio_feof(pb))
  517. goto fail;
  518. tag = avio_rl32(pb);
  519. tag_size = avio_rb32(pb);
  520. avio_rb16(pb);
  521. av_log(s, AV_LOG_TRACE, "tag=%s size=%d\n",
  522. av_fourcc2str(tag), tag_size);
  523. if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
  524. goto fail;
  525. switch(tag) {
  526. case MKTAG('P', 'R', 'O', 'P'):
  527. /* file header */
  528. avio_rb32(pb); /* max bit rate */
  529. avio_rb32(pb); /* avg bit rate */
  530. avio_rb32(pb); /* max packet size */
  531. avio_rb32(pb); /* avg packet size */
  532. avio_rb32(pb); /* nb packets */
  533. duration = avio_rb32(pb); /* duration */
  534. s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
  535. avio_rb32(pb); /* preroll */
  536. indx_off = avio_rb32(pb); /* index offset */
  537. data_off = avio_rb32(pb); /* data offset */
  538. avio_rb16(pb); /* nb streams */
  539. flags = avio_rb16(pb); /* flags */
  540. break;
  541. case MKTAG('C', 'O', 'N', 'T'):
  542. rm_read_metadata(s, pb, 1);
  543. break;
  544. case MKTAG('M', 'D', 'P', 'R'):
  545. st = avformat_new_stream(s, NULL);
  546. if (!st) {
  547. ret = AVERROR(ENOMEM);
  548. goto fail;
  549. }
  550. st->id = avio_rb16(pb);
  551. avio_rb32(pb); /* max bit rate */
  552. st->codecpar->bit_rate = avio_rb32(pb); /* bit rate */
  553. avio_rb32(pb); /* max packet size */
  554. avio_rb32(pb); /* avg packet size */
  555. start_time = avio_rb32(pb); /* start time */
  556. avio_rb32(pb); /* preroll */
  557. duration = avio_rb32(pb); /* duration */
  558. st->start_time = start_time;
  559. st->duration = duration;
  560. if(duration>0)
  561. s->duration = AV_NOPTS_VALUE;
  562. get_str8(pb, buf, sizeof(buf)); /* desc */
  563. get_str8(pb, mime, sizeof(mime)); /* mimetype */
  564. st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
  565. st->priv_data = ff_rm_alloc_rmstream();
  566. if (!st->priv_data)
  567. return AVERROR(ENOMEM);
  568. size = avio_rb32(pb);
  569. codec_pos = avio_tell(pb);
  570. ffio_ensure_seekback(pb, 4);
  571. v = avio_rb32(pb);
  572. if (v == MKBETAG('M', 'L', 'T', 'I')) {
  573. ret = rm_read_multi(s, s->pb, st, mime);
  574. if (ret < 0)
  575. goto fail;
  576. avio_seek(pb, codec_pos + size, SEEK_SET);
  577. } else {
  578. avio_skip(pb, -4);
  579. if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
  580. size, mime) < 0)
  581. goto fail;
  582. }
  583. break;
  584. case MKTAG('D', 'A', 'T', 'A'):
  585. goto header_end;
  586. default:
  587. /* unknown tag: skip it */
  588. avio_skip(pb, tag_size - 10);
  589. break;
  590. }
  591. }
  592. header_end:
  593. rm->nb_packets = avio_rb32(pb); /* number of packets */
  594. if (!rm->nb_packets && (flags & 4))
  595. rm->nb_packets = 3600 * 25;
  596. avio_rb32(pb); /* next data header */
  597. if (!data_off)
  598. data_off = avio_tell(pb) - 18;
  599. if (indx_off && (pb->seekable & AVIO_SEEKABLE_NORMAL) &&
  600. !(s->flags & AVFMT_FLAG_IGNIDX) &&
  601. avio_seek(pb, indx_off, SEEK_SET) >= 0) {
  602. rm_read_index(s);
  603. avio_seek(pb, data_off + 18, SEEK_SET);
  604. }
  605. return 0;
  606. fail:
  607. rm_read_close(s);
  608. return ret;
  609. }
  610. static int get_num(AVIOContext *pb, int *len)
  611. {
  612. int n, n1;
  613. n = avio_rb16(pb);
  614. (*len)-=2;
  615. n &= 0x7FFF;
  616. if (n >= 0x4000) {
  617. return n - 0x4000;
  618. } else {
  619. n1 = avio_rb16(pb);
  620. (*len)-=2;
  621. return (n << 16) | n1;
  622. }
  623. }
  624. /* multiple of 20 bytes for ra144 (ugly) */
  625. #define RAW_PACKET_SIZE 1000
  626. static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
  627. RMDemuxContext *rm = s->priv_data;
  628. AVIOContext *pb = s->pb;
  629. AVStream *st;
  630. uint32_t state=0xFFFFFFFF;
  631. while(!avio_feof(pb)){
  632. int len, num, i;
  633. int mlti_id;
  634. *pos= avio_tell(pb) - 3;
  635. if(rm->remaining_len > 0){
  636. num= rm->current_stream;
  637. mlti_id = 0;
  638. len= rm->remaining_len;
  639. *timestamp = AV_NOPTS_VALUE;
  640. *flags= 0;
  641. }else{
  642. state= (state<<8) + avio_r8(pb);
  643. if(state == MKBETAG('I', 'N', 'D', 'X')){
  644. int n_pkts, expected_len;
  645. len = avio_rb32(pb);
  646. avio_skip(pb, 2);
  647. n_pkts = avio_rb32(pb);
  648. expected_len = 20 + n_pkts * 14;
  649. if (len == 20)
  650. /* some files don't add index entries to chunk size... */
  651. len = expected_len;
  652. else if (len != expected_len)
  653. av_log(s, AV_LOG_WARNING,
  654. "Index size %d (%d pkts) is wrong, should be %d.\n",
  655. len, n_pkts, expected_len);
  656. len -= 14; // we already read part of the index header
  657. if(len<0)
  658. continue;
  659. goto skip;
  660. } else if (state == MKBETAG('D','A','T','A')) {
  661. av_log(s, AV_LOG_WARNING,
  662. "DATA tag in middle of chunk, file may be broken.\n");
  663. }
  664. if(state > (unsigned)0xFFFF || state <= 12)
  665. continue;
  666. len=state - 12;
  667. state= 0xFFFFFFFF;
  668. num = avio_rb16(pb);
  669. *timestamp = avio_rb32(pb);
  670. mlti_id = avio_r8((pb) >> 1) - 1;
  671. mlti_id = FFMAX(mlti_id, 0) << 16;
  672. *flags = avio_r8(pb); /* flags */
  673. }
  674. for(i=0;i<s->nb_streams;i++) {
  675. st = s->streams[i];
  676. if (mlti_id + num == st->id)
  677. break;
  678. }
  679. if (i == s->nb_streams) {
  680. skip:
  681. /* skip packet if unknown number */
  682. avio_skip(pb, len);
  683. rm->remaining_len = 0;
  684. continue;
  685. }
  686. *stream_index= i;
  687. return len;
  688. }
  689. return -1;
  690. }
  691. static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
  692. RMDemuxContext *rm, RMStream *vst,
  693. AVPacket *pkt, int len, int *pseq,
  694. int64_t *timestamp)
  695. {
  696. int hdr;
  697. int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silence compiler warning
  698. int type;
  699. int ret;
  700. hdr = avio_r8(pb); len--;
  701. type = hdr >> 6;
  702. if(type != 3){ // not frame as a part of packet
  703. seq = avio_r8(pb); len--;
  704. }
  705. if(type != 1){ // not whole frame
  706. len2 = get_num(pb, &len);
  707. pos = get_num(pb, &len);
  708. pic_num = avio_r8(pb); len--;
  709. }
  710. if(len<0) {
  711. av_log(s, AV_LOG_ERROR, "Insufficient data\n");
  712. return -1;
  713. }
  714. rm->remaining_len = len;
  715. if(type&1){ // frame, not slice
  716. if(type == 3){ // frame as a part of packet
  717. len= len2;
  718. *timestamp = pos;
  719. }
  720. if(rm->remaining_len < len) {
  721. av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
  722. return -1;
  723. }
  724. rm->remaining_len -= len;
  725. if(av_new_packet(pkt, len + 9) < 0)
  726. return AVERROR(EIO);
  727. pkt->data[0] = 0;
  728. AV_WL32(pkt->data + 1, 1);
  729. AV_WL32(pkt->data + 5, 0);
  730. if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
  731. av_packet_unref(pkt);
  732. av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
  733. return ret < 0 ? ret : AVERROR(EIO);
  734. }
  735. return 0;
  736. }
  737. //now we have to deal with single slice
  738. *pseq = seq;
  739. if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
  740. if (len2 > ffio_limit(pb, len2)) {
  741. av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
  742. return AVERROR_INVALIDDATA;
  743. }
  744. vst->slices = ((hdr & 0x3F) << 1) + 1;
  745. vst->videobufsize = len2 + 8*vst->slices + 1;
  746. av_packet_unref(&vst->pkt); //FIXME this should be output.
  747. if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
  748. return AVERROR(ENOMEM);
  749. memset(vst->pkt.data, 0, vst->pkt.size);
  750. vst->videobufpos = 8*vst->slices + 1;
  751. vst->cur_slice = 0;
  752. vst->curpic_num = pic_num;
  753. vst->pktpos = avio_tell(pb);
  754. }
  755. if(type == 2)
  756. len = FFMIN(len, pos);
  757. if(++vst->cur_slice > vst->slices) {
  758. av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
  759. return 1;
  760. }
  761. if(!vst->pkt.data)
  762. return AVERROR(ENOMEM);
  763. AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
  764. AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
  765. if(vst->videobufpos + len > vst->videobufsize) {
  766. av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
  767. return 1;
  768. }
  769. if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
  770. return AVERROR(EIO);
  771. vst->videobufpos += len;
  772. rm->remaining_len-= len;
  773. if (type == 2 || vst->videobufpos == vst->videobufsize) {
  774. vst->pkt.data[0] = vst->cur_slice-1;
  775. *pkt= vst->pkt;
  776. vst->pkt.data= NULL;
  777. vst->pkt.size= 0;
  778. vst->pkt.buf = NULL;
  779. if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
  780. memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
  781. vst->videobufpos - 1 - 8*vst->slices);
  782. pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
  783. pkt->pts = AV_NOPTS_VALUE;
  784. pkt->pos = vst->pktpos;
  785. vst->slices = 0;
  786. return 0;
  787. }
  788. return 1;
  789. }
  790. static inline void
  791. rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
  792. {
  793. uint8_t *ptr;
  794. int j;
  795. if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
  796. ptr = pkt->data;
  797. for (j=0;j<pkt->size;j+=2) {
  798. FFSWAP(int, ptr[0], ptr[1]);
  799. ptr += 2;
  800. }
  801. }
  802. }
  803. static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
  804. int ret = avio_read(pb, dst, n);
  805. if (ret != n) {
  806. if (ret >= 0) memset(dst + ret, 0, n - ret);
  807. else memset(dst , 0, n);
  808. av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
  809. }
  810. return ret;
  811. }
  812. int
  813. ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
  814. AVStream *st, RMStream *ast, int len, AVPacket *pkt,
  815. int *seq, int flags, int64_t timestamp)
  816. {
  817. RMDemuxContext *rm = s->priv_data;
  818. int ret;
  819. if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
  820. rm->current_stream= st->id;
  821. ret = rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp);
  822. if(ret)
  823. return ret < 0 ? ret : -1; //got partial frame or error
  824. } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
  825. if ((ast->deint_id == DEINT_ID_GENR) ||
  826. (ast->deint_id == DEINT_ID_INT4) ||
  827. (ast->deint_id == DEINT_ID_SIPR)) {
  828. int x;
  829. int sps = ast->sub_packet_size;
  830. int cfs = ast->coded_framesize;
  831. int h = ast->sub_packet_h;
  832. int y = ast->sub_packet_cnt;
  833. int w = ast->audio_framesize;
  834. if (flags & 2)
  835. y = ast->sub_packet_cnt = 0;
  836. if (!y)
  837. ast->audiotimestamp = timestamp;
  838. switch (ast->deint_id) {
  839. case DEINT_ID_INT4:
  840. for (x = 0; x < h/2; x++)
  841. readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
  842. break;
  843. case DEINT_ID_GENR:
  844. for (x = 0; x < w/sps; x++)
  845. readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
  846. break;
  847. case DEINT_ID_SIPR:
  848. readfull(s, pb, ast->pkt.data + y * w, w);
  849. break;
  850. }
  851. if (++(ast->sub_packet_cnt) < h)
  852. return -1;
  853. if (ast->deint_id == DEINT_ID_SIPR)
  854. ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
  855. ast->sub_packet_cnt = 0;
  856. rm->audio_stream_num = st->index;
  857. if (st->codecpar->block_align <= 0) {
  858. av_log(s, AV_LOG_ERROR, "Invalid block alignment %d\n", st->codecpar->block_align);
  859. return AVERROR_INVALIDDATA;
  860. }
  861. rm->audio_pkt_cnt = h * w / st->codecpar->block_align;
  862. } else if ((ast->deint_id == DEINT_ID_VBRF) ||
  863. (ast->deint_id == DEINT_ID_VBRS)) {
  864. int x;
  865. rm->audio_stream_num = st->index;
  866. ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
  867. if (ast->sub_packet_cnt) {
  868. for (x = 0; x < ast->sub_packet_cnt; x++)
  869. ast->sub_packet_lengths[x] = avio_rb16(pb);
  870. rm->audio_pkt_cnt = ast->sub_packet_cnt;
  871. ast->audiotimestamp = timestamp;
  872. } else
  873. return -1;
  874. } else {
  875. ret = av_get_packet(pb, pkt, len);
  876. if (ret < 0)
  877. return ret;
  878. rm_ac3_swap_bytes(st, pkt);
  879. }
  880. } else {
  881. ret = av_get_packet(pb, pkt, len);
  882. if (ret < 0)
  883. return ret;
  884. }
  885. pkt->stream_index = st->index;
  886. pkt->pts = timestamp;
  887. if (flags & 2)
  888. pkt->flags |= AV_PKT_FLAG_KEY;
  889. return st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
  890. }
  891. int
  892. ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
  893. AVStream *st, RMStream *ast, AVPacket *pkt)
  894. {
  895. RMDemuxContext *rm = s->priv_data;
  896. int ret;
  897. av_assert0 (rm->audio_pkt_cnt > 0);
  898. if (ast->deint_id == DEINT_ID_VBRF ||
  899. ast->deint_id == DEINT_ID_VBRS) {
  900. ret = av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
  901. if (ret < 0)
  902. return ret;
  903. } else {
  904. ret = av_new_packet(pkt, st->codecpar->block_align);
  905. if (ret < 0)
  906. return ret;
  907. memcpy(pkt->data, ast->pkt.data + st->codecpar->block_align * //FIXME avoid this
  908. (ast->sub_packet_h * ast->audio_framesize / st->codecpar->block_align - rm->audio_pkt_cnt),
  909. st->codecpar->block_align);
  910. }
  911. rm->audio_pkt_cnt--;
  912. if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
  913. ast->audiotimestamp = AV_NOPTS_VALUE;
  914. pkt->flags = AV_PKT_FLAG_KEY;
  915. } else
  916. pkt->flags = 0;
  917. pkt->stream_index = st->index;
  918. return rm->audio_pkt_cnt;
  919. }
  920. static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
  921. {
  922. RMDemuxContext *rm = s->priv_data;
  923. AVStream *st = NULL; // init to silence compiler warning
  924. int i, len, res, seq = 1;
  925. int64_t timestamp, pos;
  926. int flags;
  927. for (;;) {
  928. if (rm->audio_pkt_cnt) {
  929. // If there are queued audio packet return them first
  930. st = s->streams[rm->audio_stream_num];
  931. res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
  932. if(res < 0)
  933. return res;
  934. flags = 0;
  935. } else {
  936. if (rm->old_format) {
  937. RMStream *ast;
  938. st = s->streams[0];
  939. ast = st->priv_data;
  940. timestamp = AV_NOPTS_VALUE;
  941. len = !ast->audio_framesize ? RAW_PACKET_SIZE :
  942. ast->coded_framesize * ast->sub_packet_h / 2;
  943. flags = (seq++ == 1) ? 2 : 0;
  944. pos = avio_tell(s->pb);
  945. } else {
  946. len = rm_sync(s, &timestamp, &flags, &i, &pos);
  947. if (len > 0)
  948. st = s->streams[i];
  949. }
  950. if (avio_feof(s->pb))
  951. return AVERROR_EOF;
  952. if (len <= 0)
  953. return AVERROR(EIO);
  954. res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
  955. &seq, flags, timestamp);
  956. if (res < -1)
  957. return res;
  958. if((flags&2) && (seq&0x7F) == 1)
  959. av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
  960. if (res)
  961. continue;
  962. }
  963. if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
  964. || st->discard >= AVDISCARD_ALL){
  965. av_packet_unref(pkt);
  966. } else
  967. break;
  968. }
  969. return 0;
  970. }
  971. static int rm_read_close(AVFormatContext *s)
  972. {
  973. int i;
  974. for (i=0;i<s->nb_streams;i++)
  975. ff_rm_free_rmstream(s->streams[i]->priv_data);
  976. return 0;
  977. }
  978. static int rm_probe(const AVProbeData *p)
  979. {
  980. /* check file header */
  981. if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
  982. p->buf[2] == 'M' && p->buf[3] == 'F' &&
  983. p->buf[4] == 0 && p->buf[5] == 0) ||
  984. (p->buf[0] == '.' && p->buf[1] == 'r' &&
  985. p->buf[2] == 'a' && p->buf[3] == 0xfd))
  986. return AVPROBE_SCORE_MAX;
  987. else
  988. return 0;
  989. }
  990. static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
  991. int64_t *ppos, int64_t pos_limit)
  992. {
  993. RMDemuxContext *rm = s->priv_data;
  994. int64_t pos, dts;
  995. int stream_index2, flags, len, h;
  996. pos = *ppos;
  997. if(rm->old_format)
  998. return AV_NOPTS_VALUE;
  999. if (avio_seek(s->pb, pos, SEEK_SET) < 0)
  1000. return AV_NOPTS_VALUE;
  1001. rm->remaining_len=0;
  1002. for(;;){
  1003. int seq=1;
  1004. AVStream *st;
  1005. len = rm_sync(s, &dts, &flags, &stream_index2, &pos);
  1006. if(len<0)
  1007. return AV_NOPTS_VALUE;
  1008. st = s->streams[stream_index2];
  1009. if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
  1010. h= avio_r8(s->pb); len--;
  1011. if(!(h & 0x40)){
  1012. seq = avio_r8(s->pb); len--;
  1013. }
  1014. }
  1015. if((flags&2) && (seq&0x7F) == 1){
  1016. av_log(s, AV_LOG_TRACE, "%d %d-%d %"PRId64" %d\n",
  1017. flags, stream_index2, stream_index, dts, seq);
  1018. av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
  1019. if(stream_index2 == stream_index)
  1020. break;
  1021. }
  1022. avio_skip(s->pb, len);
  1023. }
  1024. *ppos = pos;
  1025. return dts;
  1026. }
  1027. static int rm_read_seek(AVFormatContext *s, int stream_index,
  1028. int64_t pts, int flags)
  1029. {
  1030. RMDemuxContext *rm = s->priv_data;
  1031. if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
  1032. return -1;
  1033. rm->audio_pkt_cnt = 0;
  1034. return 0;
  1035. }
  1036. AVInputFormat ff_rm_demuxer = {
  1037. .name = "rm",
  1038. .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
  1039. .priv_data_size = sizeof(RMDemuxContext),
  1040. .read_probe = rm_probe,
  1041. .read_header = rm_read_header,
  1042. .read_packet = rm_read_packet,
  1043. .read_close = rm_read_close,
  1044. .read_timestamp = rm_read_dts,
  1045. .read_seek = rm_read_seek,
  1046. };
  1047. AVInputFormat ff_rdt_demuxer = {
  1048. .name = "rdt",
  1049. .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
  1050. .priv_data_size = sizeof(RMDemuxContext),
  1051. .read_close = rm_read_close,
  1052. .flags = AVFMT_NOFILE,
  1053. };
  1054. static int ivr_probe(const AVProbeData *p)
  1055. {
  1056. if (memcmp(p->buf, ".R1M\x0\x1\x1", 7) &&
  1057. memcmp(p->buf, ".REC", 4))
  1058. return 0;
  1059. return AVPROBE_SCORE_MAX;
  1060. }
  1061. static int ivr_read_header(AVFormatContext *s)
  1062. {
  1063. unsigned tag, type, len, tlen, value;
  1064. int i, j, n, count, nb_streams = 0, ret;
  1065. uint8_t key[256], val[256];
  1066. AVIOContext *pb = s->pb;
  1067. AVStream *st;
  1068. int64_t pos, offset, temp;
  1069. pos = avio_tell(pb);
  1070. tag = avio_rl32(pb);
  1071. if (tag == MKTAG('.','R','1','M')) {
  1072. if (avio_rb16(pb) != 1)
  1073. return AVERROR_INVALIDDATA;
  1074. if (avio_r8(pb) != 1)
  1075. return AVERROR_INVALIDDATA;
  1076. len = avio_rb32(pb);
  1077. avio_skip(pb, len);
  1078. avio_skip(pb, 5);
  1079. temp = avio_rb64(pb);
  1080. while (!avio_feof(pb) && temp) {
  1081. offset = temp;
  1082. temp = avio_rb64(pb);
  1083. }
  1084. avio_skip(pb, offset - avio_tell(pb));
  1085. if (avio_r8(pb) != 1)
  1086. return AVERROR_INVALIDDATA;
  1087. len = avio_rb32(pb);
  1088. avio_skip(pb, len);
  1089. if (avio_r8(pb) != 2)
  1090. return AVERROR_INVALIDDATA;
  1091. avio_skip(pb, 16);
  1092. pos = avio_tell(pb);
  1093. tag = avio_rl32(pb);
  1094. }
  1095. if (tag != MKTAG('.','R','E','C'))
  1096. return AVERROR_INVALIDDATA;
  1097. if (avio_r8(pb) != 0)
  1098. return AVERROR_INVALIDDATA;
  1099. count = avio_rb32(pb);
  1100. for (i = 0; i < count; i++) {
  1101. if (avio_feof(pb))
  1102. return AVERROR_INVALIDDATA;
  1103. type = avio_r8(pb);
  1104. tlen = avio_rb32(pb);
  1105. avio_get_str(pb, tlen, key, sizeof(key));
  1106. len = avio_rb32(pb);
  1107. if (type == 5) {
  1108. avio_get_str(pb, len, val, sizeof(val));
  1109. av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
  1110. } else if (type == 4) {
  1111. av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
  1112. for (j = 0; j < len; j++) {
  1113. if (avio_feof(pb))
  1114. return AVERROR_INVALIDDATA;
  1115. av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
  1116. }
  1117. av_log(s, AV_LOG_DEBUG, "'\n");
  1118. } else if (len == 4 && type == 3 && !strncmp(key, "StreamCount", tlen)) {
  1119. nb_streams = value = avio_rb32(pb);
  1120. } else if (len == 4 && type == 3) {
  1121. value = avio_rb32(pb);
  1122. av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
  1123. } else {
  1124. av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
  1125. avio_skip(pb, len);
  1126. }
  1127. }
  1128. for (n = 0; n < nb_streams; n++) {
  1129. st = avformat_new_stream(s, NULL);
  1130. if (!st)
  1131. return AVERROR(ENOMEM);
  1132. st->priv_data = ff_rm_alloc_rmstream();
  1133. if (!st->priv_data)
  1134. return AVERROR(ENOMEM);
  1135. if (avio_r8(pb) != 1)
  1136. return AVERROR_INVALIDDATA;
  1137. count = avio_rb32(pb);
  1138. for (i = 0; i < count; i++) {
  1139. if (avio_feof(pb))
  1140. return AVERROR_INVALIDDATA;
  1141. type = avio_r8(pb);
  1142. tlen = avio_rb32(pb);
  1143. avio_get_str(pb, tlen, key, sizeof(key));
  1144. len = avio_rb32(pb);
  1145. if (type == 5) {
  1146. avio_get_str(pb, len, val, sizeof(val));
  1147. av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val);
  1148. } else if (type == 4 && !strncmp(key, "OpaqueData", tlen)) {
  1149. ret = ffio_ensure_seekback(pb, 4);
  1150. if (ret < 0)
  1151. return ret;
  1152. if (avio_rb32(pb) == MKBETAG('M', 'L', 'T', 'I')) {
  1153. ret = rm_read_multi(s, pb, st, NULL);
  1154. } else {
  1155. if (avio_feof(pb))
  1156. return AVERROR_INVALIDDATA;
  1157. avio_seek(pb, -4, SEEK_CUR);
  1158. ret = ff_rm_read_mdpr_codecdata(s, pb, st, st->priv_data, len, NULL);
  1159. }
  1160. if (ret < 0)
  1161. return ret;
  1162. } else if (type == 4) {
  1163. int j;
  1164. av_log(s, AV_LOG_DEBUG, "%s = '0x", key);
  1165. for (j = 0; j < len; j++)
  1166. av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb));
  1167. av_log(s, AV_LOG_DEBUG, "'\n");
  1168. } else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) {
  1169. st->duration = avio_rb32(pb);
  1170. } else if (len == 4 && type == 3) {
  1171. value = avio_rb32(pb);
  1172. av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value);
  1173. } else {
  1174. av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key);
  1175. avio_skip(pb, len);
  1176. }
  1177. }
  1178. }
  1179. if (avio_r8(pb) != 6)
  1180. return AVERROR_INVALIDDATA;
  1181. avio_skip(pb, 12);
  1182. avio_skip(pb, avio_rb64(pb) + pos - avio_tell(s->pb));
  1183. if (avio_r8(pb) != 8)
  1184. return AVERROR_INVALIDDATA;
  1185. avio_skip(pb, 8);
  1186. return 0;
  1187. }
  1188. static int ivr_read_packet(AVFormatContext *s, AVPacket *pkt)
  1189. {
  1190. RMDemuxContext *rm = s->priv_data;
  1191. int ret = AVERROR_EOF, opcode;
  1192. AVIOContext *pb = s->pb;
  1193. unsigned size, index;
  1194. int64_t pos, pts;
  1195. if (avio_feof(pb) || rm->data_end)
  1196. return AVERROR_EOF;
  1197. pos = avio_tell(pb);
  1198. for (;;) {
  1199. if (rm->audio_pkt_cnt) {
  1200. // If there are queued audio packet return them first
  1201. AVStream *st;
  1202. st = s->streams[rm->audio_stream_num];
  1203. ret = ff_rm_retrieve_cache(s, pb, st, st->priv_data, pkt);
  1204. if (ret < 0) {
  1205. return ret;
  1206. }
  1207. } else {
  1208. if (rm->remaining_len) {
  1209. avio_skip(pb, rm->remaining_len);
  1210. rm->remaining_len = 0;
  1211. }
  1212. if (avio_feof(pb))
  1213. return AVERROR_EOF;
  1214. opcode = avio_r8(pb);
  1215. if (opcode == 2) {
  1216. AVStream *st;
  1217. int seq = 1;
  1218. pts = avio_rb32(pb);
  1219. index = avio_rb16(pb);
  1220. if (index >= s->nb_streams)
  1221. return AVERROR_INVALIDDATA;
  1222. avio_skip(pb, 4);
  1223. size = avio_rb32(pb);
  1224. avio_skip(pb, 4);
  1225. if (size < 1 || size > INT_MAX/4) {
  1226. av_log(s, AV_LOG_ERROR, "size %u is invalid\n", size);
  1227. return AVERROR_INVALIDDATA;
  1228. }
  1229. st = s->streams[index];
  1230. ret = ff_rm_parse_packet(s, pb, st, st->priv_data, size, pkt,
  1231. &seq, 0, pts);
  1232. if (ret < -1) {
  1233. return ret;
  1234. } else if (ret) {
  1235. continue;
  1236. }
  1237. pkt->pos = pos;
  1238. pkt->pts = pts;
  1239. pkt->stream_index = index;
  1240. } else if (opcode == 7) {
  1241. pos = avio_rb64(pb);
  1242. if (!pos) {
  1243. rm->data_end = 1;
  1244. return AVERROR_EOF;
  1245. }
  1246. } else {
  1247. av_log(s, AV_LOG_ERROR, "Unsupported opcode=%d at %"PRIX64"\n", opcode, avio_tell(pb) - 1);
  1248. return AVERROR(EIO);
  1249. }
  1250. }
  1251. break;
  1252. }
  1253. return ret;
  1254. }
  1255. AVInputFormat ff_ivr_demuxer = {
  1256. .name = "ivr",
  1257. .long_name = NULL_IF_CONFIG_SMALL("IVR (Internet Video Recording)"),
  1258. .priv_data_size = sizeof(RMDemuxContext),
  1259. .read_probe = ivr_probe,
  1260. .read_header = ivr_read_header,
  1261. .read_packet = ivr_read_packet,
  1262. .read_close = rm_read_close,
  1263. .extensions = "ivr",
  1264. };