1/* 2 * ASF 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 22//#define DEBUG 23 24#include "libavutil/common.h" 25#include "libavutil/avstring.h" 26#include "libavcodec/mpegaudio.h" 27#include "avformat.h" 28#include "riff.h" 29#include "asf.h" 30#include "asfcrypt.h" 31#include "avlanguage.h" 32 33void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format); 34 35#undef NDEBUG 36#include <assert.h> 37 38#define FRAME_HEADER_SIZE 17 39// Fix Me! FRAME_HEADER_SIZE may be different. 40 41static const ff_asf_guid index_guid = { 42 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb 43}; 44 45static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ 46 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 47}; 48/**********************************/ 49/* decoding */ 50 51static int guidcmp(const void *g1, const void *g2) 52{ 53 return memcmp(g1, g2, sizeof(ff_asf_guid)); 54} 55 56#ifdef DEBUG 57#define PRINT_IF_GUID(g,cmp) \ 58if (!guidcmp(g, &cmp)) \ 59 dprintf(NULL, "(GUID: %s) ", #cmp) 60 61static void print_guid(const ff_asf_guid *g) 62{ 63 int i; 64 PRINT_IF_GUID(g, ff_asf_header); 65 else PRINT_IF_GUID(g, ff_asf_file_header); 66 else PRINT_IF_GUID(g, ff_asf_stream_header); 67 else PRINT_IF_GUID(g, ff_asf_audio_stream); 68 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); 69 else PRINT_IF_GUID(g, ff_asf_video_stream); 70 else PRINT_IF_GUID(g, ff_asf_video_conceal_none); 71 else PRINT_IF_GUID(g, ff_asf_command_stream); 72 else PRINT_IF_GUID(g, ff_asf_comment_header); 73 else PRINT_IF_GUID(g, ff_asf_codec_comment_header); 74 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); 75 else PRINT_IF_GUID(g, ff_asf_data_header); 76 else PRINT_IF_GUID(g, index_guid); 77 else PRINT_IF_GUID(g, ff_asf_head1_guid); 78 else PRINT_IF_GUID(g, ff_asf_head2_guid); 79 else PRINT_IF_GUID(g, ff_asf_my_guid); 80 else PRINT_IF_GUID(g, ff_asf_ext_stream_header); 81 else PRINT_IF_GUID(g, ff_asf_extended_content_header); 82 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); 83 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); 84 else PRINT_IF_GUID(g, ff_asf_metadata_header); 85 else PRINT_IF_GUID(g, ff_asf_marker_header); 86 else PRINT_IF_GUID(g, stream_bitrate_guid); 87 else PRINT_IF_GUID(g, ff_asf_language_guid); 88 else 89 dprintf(NULL, "(GUID: unknown) "); 90 for(i=0;i<16;i++) 91 dprintf(NULL, " 0x%02x,", (*g)[i]); 92 dprintf(NULL, "}\n"); 93} 94#undef PRINT_IF_GUID 95#else 96#define print_guid(g) 97#endif 98 99static void get_guid(ByteIOContext *s, ff_asf_guid *g) 100{ 101 assert(sizeof(*g) == 16); 102 get_buffer(s, *g, sizeof(*g)); 103} 104 105#if 0 106static void get_str16(ByteIOContext *pb, char *buf, int buf_size) 107{ 108 int len, c; 109 char *q; 110 111 len = get_le16(pb); 112 q = buf; 113 while (len > 0) { 114 c = get_le16(pb); 115 if ((q - buf) < buf_size - 1) 116 *q++ = c; 117 len--; 118 } 119 *q = '\0'; 120} 121#endif 122 123static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size) 124{ 125 char* q = buf; 126 while (len > 1) { 127 uint8_t tmp; 128 uint32_t ch; 129 130 GET_UTF16(ch, (len -= 2) >= 0 ? get_le16(pb) : 0, break;) 131 PUT_UTF8(ch, tmp, if (q - buf < buf_size - 1) *q++ = tmp;) 132 } 133 if (len > 0) 134 url_fskip(pb, len); 135 *q = '\0'; 136} 137 138static int asf_probe(AVProbeData *pd) 139{ 140 /* check file header */ 141 if (!guidcmp(pd->buf, &ff_asf_header)) 142 return AVPROBE_SCORE_MAX; 143 else 144 return 0; 145} 146 147static int get_value(ByteIOContext *pb, int type){ 148 switch(type){ 149 case 2: return get_le32(pb); 150 case 3: return get_le32(pb); 151 case 4: return get_le64(pb); 152 case 5: return get_le16(pb); 153 default:return INT_MIN; 154 } 155} 156 157static void get_tag(AVFormatContext *s, const char *key, int type, int len) 158{ 159 char *value; 160 161 if ((unsigned)len >= (UINT_MAX - 1)/2) 162 return; 163 164 value = av_malloc(2*len+1); 165 if (!value) 166 return; 167 168 if (type == 0) { // UTF16-LE 169 get_str16_nolen(s->pb, len, value, 2*len + 1); 170 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD 171 uint64_t num = get_value(s->pb, type); 172 snprintf(value, len, "%"PRIu64, num); 173 } else { 174 url_fskip(s->pb, len); 175 av_freep(&value); 176 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key); 177 return; 178 } 179 av_metadata_set2(&s->metadata, key, value, 0); 180 av_freep(&value); 181} 182 183static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) 184{ 185 ASFContext *asf = s->priv_data; 186 ff_asf_guid g; 187 ByteIOContext *pb = s->pb; 188 AVStream *st; 189 ASFStream *asf_st; 190 int size, i; 191 int64_t gsize; 192 AVRational dar[128]; 193 uint32_t bitrate[128]; 194 195 memset(dar, 0, sizeof(dar)); 196 memset(bitrate, 0, sizeof(bitrate)); 197 198 get_guid(pb, &g); 199 if (guidcmp(&g, &ff_asf_header)) 200 return -1; 201 get_le64(pb); 202 get_le32(pb); 203 get_byte(pb); 204 get_byte(pb); 205 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); 206 for(;;) { 207 uint64_t gpos= url_ftell(pb); 208 get_guid(pb, &g); 209 gsize = get_le64(pb); 210 dprintf(s, "%08"PRIx64": ", gpos); 211 print_guid(&g); 212 dprintf(s, " size=0x%"PRIx64"\n", gsize); 213 if (!guidcmp(&g, &ff_asf_data_header)) { 214 asf->data_object_offset = url_ftell(pb); 215 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. 216 if (!(asf->hdr.flags & 0x01) && gsize >= 100) { 217 asf->data_object_size = gsize - 24; 218 } else { 219 asf->data_object_size = (uint64_t)-1; 220 } 221 break; 222 } 223 if (gsize < 24) 224 return -1; 225 if (!guidcmp(&g, &ff_asf_file_header)) { 226 get_guid(pb, &asf->hdr.guid); 227 asf->hdr.file_size = get_le64(pb); 228 asf->hdr.create_time = get_le64(pb); 229 asf->nb_packets = get_le64(pb); 230 asf->hdr.play_time = get_le64(pb); 231 asf->hdr.send_time = get_le64(pb); 232 asf->hdr.preroll = get_le32(pb); 233 asf->hdr.ignore = get_le32(pb); 234 asf->hdr.flags = get_le32(pb); 235 asf->hdr.min_pktsize = get_le32(pb); 236 asf->hdr.max_pktsize = get_le32(pb); 237 asf->hdr.max_bitrate = get_le32(pb); 238 s->packet_size = asf->hdr.max_pktsize; 239 } else if (!guidcmp(&g, &ff_asf_stream_header)) { 240 enum AVMediaType type; 241 int type_specific_size, sizeX; 242 uint64_t total_size; 243 unsigned int tag1; 244 int64_t pos1, pos2, start_time; 245 int test_for_ext_stream_audio, is_dvr_ms_audio=0; 246 247 pos1 = url_ftell(pb); 248 249 st = av_new_stream(s, 0); 250 if (!st) 251 return AVERROR(ENOMEM); 252 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ 253 asf_st = av_mallocz(sizeof(ASFStream)); 254 if (!asf_st) 255 return AVERROR(ENOMEM); 256 st->priv_data = asf_st; 257 start_time = asf->hdr.preroll; 258 259 asf_st->stream_language_index = 128; // invalid stream index means no language info 260 261 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... 262 st->duration = asf->hdr.play_time / 263 (10000000 / 1000) - start_time; 264 } 265 get_guid(pb, &g); 266 267 test_for_ext_stream_audio = 0; 268 if (!guidcmp(&g, &ff_asf_audio_stream)) { 269 type = AVMEDIA_TYPE_AUDIO; 270 } else if (!guidcmp(&g, &ff_asf_video_stream)) { 271 type = AVMEDIA_TYPE_VIDEO; 272 } else if (!guidcmp(&g, &ff_asf_command_stream)) { 273 type = AVMEDIA_TYPE_DATA; 274 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { 275 test_for_ext_stream_audio = 1; 276 type = AVMEDIA_TYPE_UNKNOWN; 277 } else { 278 return -1; 279 } 280 get_guid(pb, &g); 281 total_size = get_le64(pb); 282 type_specific_size = get_le32(pb); 283 get_le32(pb); 284 st->id = get_le16(pb) & 0x7f; /* stream id */ 285 // mapping of asf ID to AV stream ID; 286 asf->asfid2avid[st->id] = s->nb_streams - 1; 287 288 get_le32(pb); 289 290 if (test_for_ext_stream_audio) { 291 get_guid(pb, &g); 292 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { 293 type = AVMEDIA_TYPE_AUDIO; 294 is_dvr_ms_audio=1; 295 get_guid(pb, &g); 296 get_le32(pb); 297 get_le32(pb); 298 get_le32(pb); 299 get_guid(pb, &g); 300 get_le32(pb); 301 } 302 } 303 304 st->codec->codec_type = type; 305 if (type == AVMEDIA_TYPE_AUDIO) { 306 ff_get_wav_header(pb, st->codec, type_specific_size); 307 if (is_dvr_ms_audio) { 308 // codec_id and codec_tag are unreliable in dvr_ms 309 // files. Set them later by probing stream. 310 st->codec->codec_id = CODEC_ID_PROBE; 311 st->codec->codec_tag = 0; 312 } 313 if (st->codec->codec_id == CODEC_ID_AAC) { 314 st->need_parsing = AVSTREAM_PARSE_NONE; 315 } else { 316 st->need_parsing = AVSTREAM_PARSE_FULL; 317 } 318 /* We have to init the frame size at some point .... */ 319 pos2 = url_ftell(pb); 320 if (gsize >= (pos2 + 8 - pos1 + 24)) { 321 asf_st->ds_span = get_byte(pb); 322 asf_st->ds_packet_size = get_le16(pb); 323 asf_st->ds_chunk_size = get_le16(pb); 324 get_le16(pb); //ds_data_size 325 get_byte(pb); //ds_silence_data 326 } 327 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", 328 // asf_st->ds_packet_size, asf_st->ds_chunk_size, 329 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); 330 if (asf_st->ds_span > 1) { 331 if (!asf_st->ds_chunk_size 332 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) 333 || asf_st->ds_packet_size % asf_st->ds_chunk_size) 334 asf_st->ds_span = 0; // disable descrambling 335 } 336 switch (st->codec->codec_id) { 337 case CODEC_ID_MP3: 338 st->codec->frame_size = MPA_FRAME_SIZE; 339 break; 340 case CODEC_ID_PCM_S16LE: 341 case CODEC_ID_PCM_S16BE: 342 case CODEC_ID_PCM_U16LE: 343 case CODEC_ID_PCM_U16BE: 344 case CODEC_ID_PCM_S8: 345 case CODEC_ID_PCM_U8: 346 case CODEC_ID_PCM_ALAW: 347 case CODEC_ID_PCM_MULAW: 348 st->codec->frame_size = 1; 349 break; 350 default: 351 /* This is probably wrong, but it prevents a crash later */ 352 st->codec->frame_size = 1; 353 break; 354 } 355 } else if (type == AVMEDIA_TYPE_VIDEO) { 356 get_le32(pb); 357 get_le32(pb); 358 get_byte(pb); 359 size = get_le16(pb); /* size */ 360 sizeX= get_le32(pb); /* size */ 361 st->codec->width = get_le32(pb); 362 st->codec->height = get_le32(pb); 363 /* not available for asf */ 364 get_le16(pb); /* panes */ 365 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */ 366 tag1 = get_le32(pb); 367 url_fskip(pb, 20); 368// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); 369 size= sizeX; 370 if (size > 40) { 371 st->codec->extradata_size = size - 40; 372 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); 373 get_buffer(pb, st->codec->extradata, st->codec->extradata_size); 374 } 375 376 /* Extract palette from extradata if bpp <= 8 */ 377 /* This code assumes that extradata contains only palette */ 378 /* This is true for all paletted codecs implemented in ffmpeg */ 379 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { 380 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl)); 381#if HAVE_BIGENDIAN 382 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) 383 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]); 384#else 385 memcpy(st->codec->palctrl->palette, st->codec->extradata, 386 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); 387#endif 388 st->codec->palctrl->palette_changed = 1; 389 } 390 391 st->codec->codec_tag = tag1; 392 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); 393 if(tag1 == MKTAG('D', 'V', 'R', ' ')) 394 st->need_parsing = AVSTREAM_PARSE_FULL; 395 } 396 pos2 = url_ftell(pb); 397 url_fskip(pb, gsize - (pos2 - pos1 + 24)); 398 } else if (!guidcmp(&g, &ff_asf_comment_header)) { 399 int len1, len2, len3, len4, len5; 400 401 len1 = get_le16(pb); 402 len2 = get_le16(pb); 403 len3 = get_le16(pb); 404 len4 = get_le16(pb); 405 len5 = get_le16(pb); 406 get_tag(s, "title" , 0, len1); 407 get_tag(s, "author" , 0, len2); 408 get_tag(s, "copyright", 0, len3); 409 get_tag(s, "comment" , 0, len4); 410 url_fskip(pb, len5); 411 } else if (!guidcmp(&g, &stream_bitrate_guid)) { 412 int stream_count = get_le16(pb); 413 int j; 414 415// av_log(s, AV_LOG_ERROR, "stream bitrate properties\n"); 416// av_log(s, AV_LOG_ERROR, "streams %d\n", streams); 417 for(j = 0; j < stream_count; j++) { 418 int flags, bitrate, stream_id; 419 420 flags= get_le16(pb); 421 bitrate= get_le32(pb); 422 stream_id= (flags & 0x7f); 423// av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate); 424 asf->stream_bitrates[stream_id]= bitrate; 425 } 426 } else if (!guidcmp(&g, &ff_asf_language_guid)) { 427 int j; 428 int stream_count = get_le16(pb); 429 for(j = 0; j < stream_count; j++) { 430 char lang[6]; 431 unsigned int lang_len = get_byte(pb); 432 get_str16_nolen(pb, lang_len, lang, sizeof(lang)); 433 if (j < 128) 434 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages)); 435 } 436 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) { 437 int desc_count, i; 438 439 desc_count = get_le16(pb); 440 for(i=0;i<desc_count;i++) { 441 int name_len,value_type,value_len; 442 char name[1024]; 443 444 name_len = get_le16(pb); 445 if (name_len%2) // must be even, broken lavf versions wrote len-1 446 name_len += 1; 447 get_str16_nolen(pb, name_len, name, sizeof(name)); 448 value_type = get_le16(pb); 449 value_len = get_le16(pb); 450 if (!value_type && value_len%2) 451 value_len += 1; 452 get_tag(s, name, value_type, value_len); 453 } 454 } else if (!guidcmp(&g, &ff_asf_metadata_header)) { 455 int n, stream_num, name_len, value_len, value_type, value_num; 456 n = get_le16(pb); 457 458 for(i=0;i<n;i++) { 459 char name[1024]; 460 461 get_le16(pb); //lang_list_index 462 stream_num= get_le16(pb); 463 name_len= get_le16(pb); 464 value_type= get_le16(pb); 465 value_len= get_le32(pb); 466 467 get_str16_nolen(pb, name_len, name, sizeof(name)); 468//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); 469 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere 470 url_fskip(pb, value_len - 2); 471 472 if(stream_num<128){ 473 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num; 474 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num; 475 } 476 } 477 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) { 478 int ext_len, payload_ext_ct, stream_ct; 479 uint32_t ext_d, leak_rate, stream_num; 480 unsigned int stream_languageid_index; 481 482 get_le64(pb); // starttime 483 get_le64(pb); // endtime 484 leak_rate = get_le32(pb); // leak-datarate 485 get_le32(pb); // bucket-datasize 486 get_le32(pb); // init-bucket-fullness 487 get_le32(pb); // alt-leak-datarate 488 get_le32(pb); // alt-bucket-datasize 489 get_le32(pb); // alt-init-bucket-fullness 490 get_le32(pb); // max-object-size 491 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) 492 stream_num = get_le16(pb); // stream-num 493 494 stream_languageid_index = get_le16(pb); // stream-language-id-index 495 if (stream_num < 128) 496 asf->streams[stream_num].stream_language_index = stream_languageid_index; 497 498 get_le64(pb); // avg frametime in 100ns units 499 stream_ct = get_le16(pb); //stream-name-count 500 payload_ext_ct = get_le16(pb); //payload-extension-system-count 501 502 if (stream_num < 128) 503 bitrate[stream_num] = leak_rate; 504 505 for (i=0; i<stream_ct; i++){ 506 get_le16(pb); 507 ext_len = get_le16(pb); 508 url_fseek(pb, ext_len, SEEK_CUR); 509 } 510 511 for (i=0; i<payload_ext_ct; i++){ 512 get_guid(pb, &g); 513 ext_d=get_le16(pb); 514 ext_len=get_le32(pb); 515 url_fseek(pb, ext_len, SEEK_CUR); 516 } 517 518 // there could be a optional stream properties object to follow 519 // if so the next iteration will pick it up 520 } else if (!guidcmp(&g, &ff_asf_head1_guid)) { 521 int v1, v2; 522 get_guid(pb, &g); 523 v1 = get_le32(pb); 524 v2 = get_le16(pb); 525 } else if (!guidcmp(&g, &ff_asf_marker_header)) { 526 int i, count, name_len; 527 char name[1024]; 528 529 get_le64(pb); // reserved 16 bytes 530 get_le64(pb); // ... 531 count = get_le32(pb); // markers count 532 get_le16(pb); // reserved 2 bytes 533 name_len = get_le16(pb); // name length 534 for(i=0;i<name_len;i++){ 535 get_byte(pb); // skip the name 536 } 537 538 for(i=0;i<count;i++){ 539 int64_t pres_time; 540 int name_len; 541 542 get_le64(pb); // offset, 8 bytes 543 pres_time = get_le64(pb); // presentation time 544 get_le16(pb); // entry length 545 get_le32(pb); // send time 546 get_le32(pb); // flags 547 name_len = get_le32(pb); // name length 548 get_str16_nolen(pb, name_len * 2, name, sizeof(name)); 549 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name ); 550 } 551#if 0 552 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) { 553 int len, v1, n, num; 554 char str[256], *q; 555 char tag[16]; 556 557 get_guid(pb, &g); 558 print_guid(&g); 559 560 n = get_le32(pb); 561 for(i=0;i<n;i++) { 562 num = get_le16(pb); /* stream number */ 563 get_str16(pb, str, sizeof(str)); 564 get_str16(pb, str, sizeof(str)); 565 len = get_le16(pb); 566 q = tag; 567 while (len > 0) { 568 v1 = get_byte(pb); 569 if ((q - tag) < sizeof(tag) - 1) 570 *q++ = v1; 571 len--; 572 } 573 *q = '\0'; 574 } 575#endif 576 } else if (url_feof(pb)) { 577 return -1; 578 } else { 579 if (!s->keylen) { 580 if (!guidcmp(&g, &ff_asf_content_encryption)) { 581 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n"); 582 } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) { 583 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n"); 584 } else if (!guidcmp(&g, &ff_asf_digital_signature)) { 585 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n"); 586 } 587 } 588 } 589 if(url_ftell(pb) != gpos + gsize) 590 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize); 591 url_fseek(pb, gpos + gsize, SEEK_SET); 592 } 593 get_guid(pb, &g); 594 get_le64(pb); 595 get_byte(pb); 596 get_byte(pb); 597 if (url_feof(pb)) 598 return -1; 599 asf->data_offset = url_ftell(pb); 600 asf->packet_size_left = 0; 601 602 603 for(i=0; i<128; i++){ 604 int stream_num= asf->asfid2avid[i]; 605 if(stream_num>=0){ 606 AVStream *st = s->streams[stream_num]; 607 if (!st->codec->bit_rate) 608 st->codec->bit_rate = bitrate[i]; 609 if (dar[i].num > 0 && dar[i].den > 0) 610 av_reduce(&st->sample_aspect_ratio.num, 611 &st->sample_aspect_ratio.den, 612 dar[i].num, dar[i].den, INT_MAX); 613//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); 614 615 // copy and convert language codes to the frontend 616 if (asf->streams[i].stream_language_index < 128) { 617 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; 618 if (rfc1766 && strlen(rfc1766) > 1) { 619 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any 620 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL); 621 if (iso6392) 622 av_metadata_set2(&st->metadata, "language", iso6392, 0); 623 } 624 } 625 } 626 } 627 628 return 0; 629} 630 631#define DO_2BITS(bits, var, defval) \ 632 switch (bits & 3) \ 633 { \ 634 case 3: var = get_le32(pb); rsize += 4; break; \ 635 case 2: var = get_le16(pb); rsize += 2; break; \ 636 case 1: var = get_byte(pb); rsize++; break; \ 637 default: var = defval; break; \ 638 } 639 640/** 641 * Load a single ASF packet into the demuxer. 642 * @param s demux context 643 * @param pb context to read data from 644 * @return 0 on success, <0 on error 645 */ 646static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb) 647{ 648 ASFContext *asf = s->priv_data; 649 uint32_t packet_length, padsize; 650 int rsize = 8; 651 int c, d, e, off; 652 653 // if we do not know packet size, allow skipping up to 32 kB 654 off= 32768; 655 if (s->packet_size > 0) 656 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3; 657 658 c=d=e=-1; 659 while(off-- > 0){ 660 c=d; d=e; 661 e= get_byte(pb); 662 if(c == 0x82 && !d && !e) 663 break; 664 } 665 666 if (c != 0x82) { 667 /** 668 * This code allows handling of -EAGAIN at packet boundaries (i.e. 669 * if the packet sync code above triggers -EAGAIN). This does not 670 * imply complete -EAGAIN handling support at random positions in 671 * the stream. 672 */ 673 if (url_ferror(pb) == AVERROR(EAGAIN)) 674 return AVERROR(EAGAIN); 675 if (!url_feof(pb)) 676 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb)); 677 } 678 if ((c & 0x8f) == 0x82) { 679 if (d || e) { 680 if (!url_feof(pb)) 681 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); 682 return -1; 683 } 684 c= get_byte(pb); 685 d= get_byte(pb); 686 rsize+=3; 687 }else{ 688 url_fseek(pb, -1, SEEK_CUR); //FIXME 689 } 690 691 asf->packet_flags = c; 692 asf->packet_property = d; 693 694 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); 695 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored 696 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length 697 698 //the following checks prevent overflows and infinite loops 699 if(!packet_length || packet_length >= (1U<<29)){ 700 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb)); 701 return -1; 702 } 703 if(padsize >= packet_length){ 704 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb)); 705 return -1; 706 } 707 708 asf->packet_timestamp = get_le32(pb); 709 get_le16(pb); /* duration */ 710 // rsize has at least 11 bytes which have to be present 711 712 if (asf->packet_flags & 0x01) { 713 asf->packet_segsizetype = get_byte(pb); rsize++; 714 asf->packet_segments = asf->packet_segsizetype & 0x3f; 715 } else { 716 asf->packet_segments = 1; 717 asf->packet_segsizetype = 0x80; 718 } 719 asf->packet_size_left = packet_length - padsize - rsize; 720 if (packet_length < asf->hdr.min_pktsize) 721 padsize += asf->hdr.min_pktsize - packet_length; 722 asf->packet_padsize = padsize; 723 dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left); 724 return 0; 725} 726 727/** 728 * 729 * @return <0 if error 730 */ 731static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){ 732 ASFContext *asf = s->priv_data; 733 int rsize = 1; 734 int num = get_byte(pb); 735 int64_t ts0, ts1; 736 737 asf->packet_segments--; 738 asf->packet_key_frame = num >> 7; 739 asf->stream_index = asf->asfid2avid[num & 0x7f]; 740 // sequence should be ignored! 741 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); 742 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); 743 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); 744//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size); 745 if (asf->packet_replic_size >= 8) { 746 asf->packet_obj_size = get_le32(pb); 747 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ 748 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); 749 return -1; 750 } 751 asf->packet_frag_timestamp = get_le32(pb); // timestamp 752 if(asf->packet_replic_size >= 8+38+4){ 753// for(i=0; i<asf->packet_replic_size-8; i++) 754// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb)); 755// av_log(s, AV_LOG_DEBUG, "\n"); 756 url_fskip(pb, 10); 757 ts0= get_le64(pb); 758 ts1= get_le64(pb); 759 url_fskip(pb, 12); 760 get_le32(pb); 761 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4); 762 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; 763 else asf->packet_frag_timestamp= AV_NOPTS_VALUE; 764 }else 765 url_fskip(pb, asf->packet_replic_size - 8); 766 rsize += asf->packet_replic_size; // FIXME - check validity 767 } else if (asf->packet_replic_size==1){ 768 // multipacket - frag_offset is beginning timestamp 769 asf->packet_time_start = asf->packet_frag_offset; 770 asf->packet_frag_offset = 0; 771 asf->packet_frag_timestamp = asf->packet_timestamp; 772 773 asf->packet_time_delta = get_byte(pb); 774 rsize++; 775 }else if(asf->packet_replic_size!=0){ 776 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size); 777 return -1; 778 } 779 if (asf->packet_flags & 0x01) { 780 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal 781 if(asf->packet_frag_size > asf->packet_size_left - rsize){ 782 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n"); 783 return -1; 784 } 785 //printf("Fragsize %d\n", asf->packet_frag_size); 786 } else { 787 asf->packet_frag_size = asf->packet_size_left - rsize; 788 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); 789 } 790 if (asf->packet_replic_size == 1) { 791 asf->packet_multi_size = asf->packet_frag_size; 792 if (asf->packet_multi_size > asf->packet_size_left) 793 return -1; 794 } 795 asf->packet_size_left -= rsize; 796 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); 797 798 return 0; 799} 800 801/** 802 * Parse data from individual ASF packets (which were previously loaded 803 * with asf_get_packet()). 804 * @param s demux context 805 * @param pb context to read data from 806 * @param pkt pointer to store packet data into 807 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF 808 * packets need to be loaded (through asf_get_packet()) 809 */ 810static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt) 811{ 812 ASFContext *asf = s->priv_data; 813 ASFStream *asf_st = 0; 814 for (;;) { 815 if(url_feof(pb)) 816 return AVERROR_EOF; 817 if (asf->packet_size_left < FRAME_HEADER_SIZE 818 || asf->packet_segments < 1) { 819 //asf->packet_size_left <= asf->packet_padsize) { 820 int ret = asf->packet_size_left + asf->packet_padsize; 821 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb)); 822 assert(ret>=0); 823 /* fail safe */ 824 url_fskip(pb, ret); 825 826 asf->packet_pos= url_ftell(pb); 827 if (asf->data_object_size != (uint64_t)-1 && 828 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) 829 return AVERROR_EOF; /* Do not exceed the size of the data object */ 830 return 1; 831 } 832 if (asf->packet_time_start == 0) { 833 if(asf_read_frame_header(s, pb) < 0){ 834 asf->packet_segments= 0; 835 continue; 836 } 837 if (asf->stream_index < 0 838 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL 839 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) 840 ) { 841 asf->packet_time_start = 0; 842 /* unhandled packet (should not happen) */ 843 url_fskip(pb, asf->packet_frag_size); 844 asf->packet_size_left -= asf->packet_frag_size; 845 if(asf->stream_index < 0) 846 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size); 847 continue; 848 } 849 asf->asf_st = s->streams[asf->stream_index]->priv_data; 850 } 851 asf_st = asf->asf_st; 852 853 if (asf->packet_replic_size == 1) { 854 // frag_offset is here used as the beginning timestamp 855 asf->packet_frag_timestamp = asf->packet_time_start; 856 asf->packet_time_start += asf->packet_time_delta; 857 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb); 858 asf->packet_size_left--; 859 asf->packet_multi_size--; 860 if (asf->packet_multi_size < asf->packet_obj_size) 861 { 862 asf->packet_time_start = 0; 863 url_fskip(pb, asf->packet_multi_size); 864 asf->packet_size_left -= asf->packet_multi_size; 865 continue; 866 } 867 asf->packet_multi_size -= asf->packet_obj_size; 868 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size); 869 } 870 if( /*asf->packet_frag_size == asf->packet_obj_size*/ 871 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size 872 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ 873 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", 874 asf_st->frag_offset, asf->packet_frag_size, 875 asf->packet_obj_size, asf_st->pkt.size); 876 asf->packet_obj_size= asf_st->pkt.size; 877 } 878 879 if ( asf_st->pkt.size != asf->packet_obj_size 880 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient? 881 if(asf_st->pkt.data){ 882 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size); 883 asf_st->frag_offset = 0; 884 av_free_packet(&asf_st->pkt); 885 } 886 /* new packet */ 887 av_new_packet(&asf_st->pkt, asf->packet_obj_size); 888 asf_st->seq = asf->packet_seq; 889 asf_st->pkt.dts = asf->packet_frag_timestamp; 890 asf_st->pkt.stream_index = asf->stream_index; 891 asf_st->pkt.pos = 892 asf_st->packet_pos= asf->packet_pos; 893//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", 894//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY, 895//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size); 896 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) 897 asf->packet_key_frame = 1; 898 if (asf->packet_key_frame) 899 asf_st->pkt.flags |= AV_PKT_FLAG_KEY; 900 } 901 902 /* read data */ 903 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", 904 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, 905 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); 906 asf->packet_size_left -= asf->packet_frag_size; 907 if (asf->packet_size_left < 0) 908 continue; 909 910 if( asf->packet_frag_offset >= asf_st->pkt.size 911 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ 912 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n", 913 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); 914 continue; 915 } 916 917 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset, 918 asf->packet_frag_size); 919 if (s->key && s->keylen == 20) 920 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, 921 asf->packet_frag_size); 922 asf_st->frag_offset += asf->packet_frag_size; 923 /* test if whole packet is read */ 924 if (asf_st->frag_offset == asf_st->pkt.size) { 925 //workaround for macroshit radio DVR-MS files 926 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO 927 && asf_st->pkt.size > 100){ 928 int i; 929 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); 930 if(i == asf_st->pkt.size){ 931 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); 932 asf_st->frag_offset = 0; 933 av_free_packet(&asf_st->pkt); 934 continue; 935 } 936 } 937 938 /* return packet */ 939 if (asf_st->ds_span > 1) { 940 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){ 941 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span); 942 }else{ 943 /* packet descrambling */ 944 uint8_t *newdata = av_malloc(asf_st->pkt.size); 945 if (newdata) { 946 int offset = 0; 947 while (offset < asf_st->pkt.size) { 948 int off = offset / asf_st->ds_chunk_size; 949 int row = off / asf_st->ds_span; 950 int col = off % asf_st->ds_span; 951 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; 952 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); 953 954 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); 955 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size); 956 memcpy(newdata + offset, 957 asf_st->pkt.data + idx * asf_st->ds_chunk_size, 958 asf_st->ds_chunk_size); 959 offset += asf_st->ds_chunk_size; 960 } 961 av_free(asf_st->pkt.data); 962 asf_st->pkt.data = newdata; 963 } 964 } 965 } 966 asf_st->frag_offset = 0; 967 *pkt= asf_st->pkt; 968 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); 969 asf_st->pkt.size = 0; 970 asf_st->pkt.data = 0; 971 break; // packet completed 972 } 973 } 974 return 0; 975} 976 977static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) 978{ 979 ASFContext *asf = s->priv_data; 980 981 for (;;) { 982 int ret; 983 984 /* parse cached packets, if any */ 985 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) 986 return ret; 987 if ((ret = ff_asf_get_packet(s, s->pb)) < 0) 988 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1); 989 asf->packet_time_start = 0; 990 } 991 992 return 0; 993} 994 995// Added to support seeking after packets have been read 996// If information is not reset, read_packet fails due to 997// leftover information from previous reads 998static void asf_reset_header(AVFormatContext *s) 999{ 1000 ASFContext *asf = s->priv_data; 1001 ASFStream *asf_st; 1002 int i; 1003 1004 asf->packet_nb_frames = 0; 1005 asf->packet_size_left = 0; 1006 asf->packet_segments = 0; 1007 asf->packet_flags = 0; 1008 asf->packet_property = 0; 1009 asf->packet_timestamp = 0; 1010 asf->packet_segsizetype = 0; 1011 asf->packet_segments = 0; 1012 asf->packet_seq = 0; 1013 asf->packet_replic_size = 0; 1014 asf->packet_key_frame = 0; 1015 asf->packet_padsize = 0; 1016 asf->packet_frag_offset = 0; 1017 asf->packet_frag_size = 0; 1018 asf->packet_frag_timestamp = 0; 1019 asf->packet_multi_size = 0; 1020 asf->packet_obj_size = 0; 1021 asf->packet_time_delta = 0; 1022 asf->packet_time_start = 0; 1023 1024 for(i=0; i<s->nb_streams; i++){ 1025 asf_st= s->streams[i]->priv_data; 1026 av_free_packet(&asf_st->pkt); 1027 asf_st->frag_offset=0; 1028 asf_st->seq=0; 1029 } 1030 asf->asf_st= NULL; 1031} 1032 1033static int asf_read_close(AVFormatContext *s) 1034{ 1035 int i; 1036 1037 asf_reset_header(s); 1038 for(i=0;i<s->nb_streams;i++) { 1039 AVStream *st = s->streams[i]; 1040 av_free(st->codec->palctrl); 1041 } 1042 return 0; 1043} 1044 1045static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) 1046{ 1047 AVPacket pkt1, *pkt = &pkt1; 1048 ASFStream *asf_st; 1049 int64_t pts; 1050 int64_t pos= *ppos; 1051 int i; 1052 int64_t start_pos[s->nb_streams]; 1053 1054 for(i=0; i<s->nb_streams; i++){ 1055 start_pos[i]= pos; 1056 } 1057 1058 if (s->packet_size > 0) 1059 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset; 1060 *ppos= pos; 1061 url_fseek(s->pb, pos, SEEK_SET); 1062 1063//printf("asf_read_pts\n"); 1064 asf_reset_header(s); 1065 for(;;){ 1066 if (av_read_frame(s, pkt) < 0){ 1067 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); 1068 return AV_NOPTS_VALUE; 1069 } 1070 1071 pts= pkt->pts; 1072 1073 av_free_packet(pkt); 1074 if(pkt->flags&AV_PKT_FLAG_KEY){ 1075 i= pkt->stream_index; 1076 1077 asf_st= s->streams[i]->priv_data; 1078 1079// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); 1080 pos= asf_st->packet_pos; 1081 1082 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); 1083 start_pos[i]= asf_st->packet_pos + 1; 1084 1085 if(pkt->stream_index == stream_index) 1086 break; 1087 } 1088 } 1089 1090 *ppos= pos; 1091//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); 1092 1093 return pts; 1094} 1095 1096static void asf_build_simple_index(AVFormatContext *s, int stream_index) 1097{ 1098 ff_asf_guid g; 1099 ASFContext *asf = s->priv_data; 1100 int64_t current_pos= url_ftell(s->pb); 1101 int i; 1102 1103 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); 1104 get_guid(s->pb, &g); 1105 if (!guidcmp(&g, &index_guid)) { 1106 int64_t itime, last_pos=-1; 1107 int pct, ict; 1108 int64_t av_unused gsize= get_le64(s->pb); 1109 get_guid(s->pb, &g); 1110 itime=get_le64(s->pb); 1111 pct=get_le32(s->pb); 1112 ict=get_le32(s->pb); 1113 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); 1114 1115 for (i=0;i<ict;i++){ 1116 int pktnum=get_le32(s->pb); 1117 int pktct =get_le16(s->pb); 1118 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum; 1119 int64_t index_pts= av_rescale(itime, i, 10000); 1120 1121 if(pos != last_pos){ 1122 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct); 1123 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME); 1124 last_pos=pos; 1125 } 1126 } 1127 asf->index_read= 1; 1128 } 1129 url_fseek(s->pb, current_pos, SEEK_SET); 1130} 1131 1132static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) 1133{ 1134 ASFContext *asf = s->priv_data; 1135 AVStream *st = s->streams[stream_index]; 1136 int64_t pos; 1137 int index; 1138 1139 if (s->packet_size <= 0) 1140 return -1; 1141 1142 /* Try using the protocol's read_seek if available */ 1143 if(s->pb) { 1144 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags); 1145 if(ret >= 0) 1146 asf_reset_header(s); 1147 if (ret != AVERROR(ENOSYS)) 1148 return ret; 1149 } 1150 1151 if (!asf->index_read) 1152 asf_build_simple_index(s, stream_index); 1153 1154 if(!(asf->index_read && st->index_entries)){ 1155 if(av_seek_frame_binary(s, stream_index, pts, flags)<0) 1156 return -1; 1157 }else{ 1158 index= av_index_search_timestamp(st, pts, flags); 1159 if(index<0) 1160 return -1; 1161 1162 /* find the position */ 1163 pos = st->index_entries[index].pos; 1164 1165 // various attempts to find key frame have failed so far 1166 // asf_reset_header(s); 1167 // url_fseek(s->pb, pos, SEEK_SET); 1168 // key_pos = pos; 1169 // for(i=0;i<16;i++){ 1170 // pos = url_ftell(s->pb); 1171 // if (av_read_frame(s, &pkt) < 0){ 1172 // av_log(s, AV_LOG_INFO, "seek failed\n"); 1173 // return -1; 1174 // } 1175 // asf_st = s->streams[stream_index]->priv_data; 1176 // pos += st->parser->frame_offset; 1177 // 1178 // if (pkt.size > b) { 1179 // b = pkt.size; 1180 // key_pos = pos; 1181 // } 1182 // 1183 // av_free_packet(&pkt); 1184 // } 1185 1186 /* do the seek */ 1187 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); 1188 url_fseek(s->pb, pos, SEEK_SET); 1189 } 1190 asf_reset_header(s); 1191 return 0; 1192} 1193 1194AVInputFormat asf_demuxer = { 1195 "asf", 1196 NULL_IF_CONFIG_SMALL("ASF format"), 1197 sizeof(ASFContext), 1198 asf_probe, 1199 asf_read_header, 1200 asf_read_packet, 1201 asf_read_close, 1202 asf_read_seek, 1203 asf_read_pts, 1204 .metadata_conv = ff_asf_metadata_conv, 1205}; 1206