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00028 #include "libavutil/intreadwrite.h"
00029 #include "libavutil/intfloat.h"
00030 #include "libavutil/dict.h"
00031 #include "avformat.h"
00032 #include "internal.h"
00033 #include "riff.h"
00034 #include "asf.h"
00035 #include "mpegts.h"
00036
00037
00038 #define PRI_GUID \
00039 "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
00040 #define ARG_GUID(g) \
00041 g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
00042
00043 #define PRI_PRETTY_GUID \
00044 "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
00045 #define ARG_PRETTY_GUID(g) \
00046 AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
00047 #define LEN_PRETTY_GUID 34
00048
00049
00050
00051
00052
00053
00054
00055 #define WTV_SECTOR_BITS 12
00056 #define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
00057 #define WTV_BIGSECTOR_BITS 18
00058
00059 typedef struct {
00060 AVIOContext *pb_filesystem;
00062 int sector_bits;
00063 uint32_t *sectors;
00064 int nb_sectors;
00066 int error;
00067 int64_t position;
00068 int64_t length;
00069 } WtvFile;
00070
00074 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
00075 {
00076 WtvFile *wf = opaque;
00077 AVIOContext *pb = wf->pb_filesystem;
00078 int nread = 0;
00079
00080 if (wf->error || pb->error)
00081 return -1;
00082 if (wf->position >= wf->length || pb->eof_reached)
00083 return 0;
00084
00085 buf_size = FFMIN(buf_size, wf->length - wf->position);
00086 while(nread < buf_size) {
00087 int n;
00088 int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
00089 int read_request = FFMIN(buf_size - nread, remaining_in_sector);
00090
00091 n = avio_read(pb, buf, read_request);
00092 if (n <= 0)
00093 break;
00094 nread += n;
00095 buf += n;
00096 wf->position += n;
00097 if (n == remaining_in_sector) {
00098 int i = wf->position >> wf->sector_bits;
00099 if (i >= wf->nb_sectors ||
00100 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
00101 avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
00102 wf->error = 1;
00103 break;
00104 }
00105 }
00106 }
00107 return nread;
00108 }
00109
00113 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
00114 {
00115 WtvFile *wf = opaque;
00116 AVIOContext *pb = wf->pb_filesystem;
00117
00118 if (whence == AVSEEK_SIZE)
00119 return wf->length;
00120 else if (whence == SEEK_CUR)
00121 offset = wf->position + offset;
00122 else if (whence == SEEK_END)
00123 offset = wf->length;
00124
00125 wf->error = offset < 0 || offset >= wf->length ||
00126 avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
00127 + (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0;
00128 wf->position = offset;
00129 return offset;
00130 }
00131
00139 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
00140 {
00141 int i, total = 0;
00142 for (i = 0; i < count; i++) {
00143 if ((data[total] = avio_rl32(pb)))
00144 total++;
00145 }
00146 return total;
00147 }
00148
00156 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
00157 {
00158 AVIOContext *pb;
00159 WtvFile *wf;
00160 uint8_t *buffer;
00161
00162 if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
00163 return NULL;
00164
00165 wf = av_mallocz(sizeof(WtvFile));
00166 if (!wf)
00167 return NULL;
00168
00169 if (depth == 0) {
00170 wf->sectors = av_malloc(sizeof(uint32_t));
00171 if (!wf->sectors) {
00172 av_free(wf);
00173 return NULL;
00174 }
00175 wf->sectors[0] = first_sector;
00176 wf->nb_sectors = 1;
00177 wf->sector_bits = WTV_SECTOR_BITS;
00178 } else if (depth == 1) {
00179 wf->sectors = av_malloc(WTV_SECTOR_SIZE);
00180 if (!wf->sectors) {
00181 av_free(wf);
00182 return NULL;
00183 }
00184 wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
00185 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
00186 } else if (depth == 2) {
00187 uint32_t sectors1[WTV_SECTOR_SIZE / 4];
00188 int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
00189 int i;
00190
00191 wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS);
00192 if (!wf->sectors) {
00193 av_free(wf);
00194 return NULL;
00195 }
00196 wf->nb_sectors = 0;
00197 for (i = 0; i < nb_sectors1; i++) {
00198 if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
00199 break;
00200 wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
00201 }
00202 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
00203 } else {
00204 av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
00205 av_free(wf);
00206 return NULL;
00207 }
00208
00209 if (!wf->nb_sectors) {
00210 av_free(wf->sectors);
00211 av_free(wf);
00212 return NULL;
00213 }
00214
00215
00216 length &= 0xFFFFFFFFFFFF;
00217 if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
00218 av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits);
00219 length = (int64_t)wf->nb_sectors << wf->sector_bits;
00220 }
00221 wf->length = length;
00222
00223
00224 wf->position = 0;
00225 if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) {
00226 av_free(wf->sectors);
00227 av_free(wf);
00228 return NULL;
00229 }
00230
00231 wf->pb_filesystem = s->pb;
00232 buffer = av_malloc(1 << wf->sector_bits);
00233 if (!buffer) {
00234 av_free(wf->sectors);
00235 av_free(wf);
00236 return NULL;
00237 }
00238
00239 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
00240 wtvfile_read_packet, NULL, wtvfile_seek);
00241 if (!pb) {
00242 av_free(buffer);
00243 av_free(wf->sectors);
00244 av_free(wf);
00245 }
00246 return pb;
00247 }
00248
00249 static const ff_asf_guid dir_entry_guid =
00250 {0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
00251
00260 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
00261 {
00262 const uint8_t *buf_end = buf + buf_size;
00263
00264 while(buf + 48 <= buf_end) {
00265 int dir_length, name_size, first_sector, depth;
00266 uint64_t file_length;
00267 const uint8_t *name;
00268 if (ff_guidcmp(buf, dir_entry_guid)) {
00269 av_log(s, AV_LOG_ERROR, "unknown guid "PRI_GUID", expected dir_entry_guid; "
00270 "remaining directory entries ignored\n", ARG_GUID(buf));
00271 break;
00272 }
00273 dir_length = AV_RL16(buf + 16);
00274 file_length = AV_RL64(buf + 24);
00275 name_size = 2 * AV_RL32(buf + 32);
00276 if (name_size < 0) {
00277 av_log(s, AV_LOG_ERROR,
00278 "bad filename length, remaining directory entries ignored\n");
00279 break;
00280 }
00281 if (48 + name_size > buf_end - buf) {
00282 av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
00283 break;
00284 }
00285 first_sector = AV_RL32(buf + 40 + name_size);
00286 depth = AV_RL32(buf + 44 + name_size);
00287
00288
00289 name = buf + 40;
00290 if (name_size >= filename_size &&
00291 !memcmp(name, filename, filename_size) &&
00292 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
00293 return wtvfile_open_sector(first_sector, file_length, depth, s);
00294
00295 buf += dir_length;
00296 }
00297 return 0;
00298 }
00299
00300 #define wtvfile_open(s, buf, buf_size, filename) \
00301 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
00302
00306 static void wtvfile_close(AVIOContext *pb)
00307 {
00308 WtvFile *wf = pb->opaque;
00309 av_free(wf->sectors);
00310 av_free(wf);
00311 av_free(pb->buffer);
00312 av_free(pb);
00313 }
00314
00315
00316
00317
00318
00319
00320
00321 typedef struct {
00322 int seen_data;
00323 } WtvStream;
00324
00325 typedef struct {
00326 AVIOContext *pb;
00327 int64_t epoch;
00328 int64_t pts;
00329 int64_t last_valid_pts;
00331
00332
00333 AVIndexEntry *index_entries;
00334 int nb_index_entries;
00335 unsigned int index_entries_allocated_size;
00336 } WtvContext;
00337
00338 typedef struct {
00339 enum CodecID id;
00340 ff_asf_guid guid;
00341 } AVCodecGuid;
00342
00343 static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
00344 {
00345 int i;
00346 for (i = 0; guids[i].id != CODEC_ID_NONE; i++) {
00347 if (!ff_guidcmp(guids[i].guid, guid))
00348 return guids[i].id;
00349 }
00350 return CODEC_ID_NONE;
00351 }
00352
00353
00354 static const ff_asf_guid wtv_guid =
00355 {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00356 static const ff_asf_guid metadata_guid =
00357 {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
00358 static const ff_asf_guid timestamp_guid =
00359 {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
00360 static const ff_asf_guid data_guid =
00361 {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00362 static const ff_asf_guid stream_guid =
00363 {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
00364 static const ff_asf_guid stream2_guid =
00365 {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00366 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
00367 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
00368 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
00369 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
00370 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
00371 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
00372 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
00373 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
00374 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
00375 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
00376 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
00377 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
00378 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
00379 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
00380 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
00381 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
00382 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
00383 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
00384
00385
00386
00387 #define MEDIASUBTYPE_BASE_GUID \
00388 0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
00389
00390
00391 static const ff_asf_guid mediatype_audio =
00392 {'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
00393 static const ff_asf_guid mediatype_video =
00394 {'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
00395 static const ff_asf_guid mediasubtype_mpeg1payload =
00396 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
00397 static const ff_asf_guid mediatype_mpeg2_sections =
00398 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
00399 static const ff_asf_guid mediatype_mpeg2_pes =
00400 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
00401 static const ff_asf_guid mediatype_mstvcaption =
00402 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
00403
00404
00405 static const ff_asf_guid mediasubtype_cpfilters_processed =
00406 {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
00407 static const ff_asf_guid mediasubtype_dvb_subtitle =
00408 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
00409 static const ff_asf_guid mediasubtype_teletext =
00410 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
00411 static const ff_asf_guid mediasubtype_dtvccdata =
00412 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
00413 static const ff_asf_guid mediasubtype_mpeg2_sections =
00414 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
00415
00416
00417 static const ff_asf_guid format_cpfilters_processed =
00418 {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
00419 static const ff_asf_guid format_waveformatex =
00420 {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
00421 static const ff_asf_guid format_videoinfo2 =
00422 {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
00423 static const ff_asf_guid format_mpeg2_video =
00424 {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
00425 static const ff_asf_guid format_none =
00426 {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
00427
00428 static const AVCodecGuid video_guids[] = {
00429 {CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00430 {CODEC_ID_NONE}
00431 };
00432
00433 static const AVCodecGuid audio_guids[] = {
00434 {CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00435 {CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
00436 {CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00437 {CODEC_ID_NONE}
00438 };
00439
00440 static int read_probe(AVProbeData *p)
00441 {
00442 return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
00443 }
00444
00448 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
00449 {
00450 time_t t = (value / 10000000LL) - 11644473600LL;
00451 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00452 }
00453
00457 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
00458 {
00459 time_t t = (value / 10000000LL) - 719162LL*86400LL;
00460 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00461 }
00462
00466 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
00467 {
00468 time_t t = 631112400LL + 86400*av_int2double(value);
00469 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00470 }
00471
00472 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
00473 {
00474 char mime[1024];
00475 char description[1024];
00476 unsigned int filesize;
00477 AVStream *st;
00478 int64_t pos = avio_tell(pb);
00479
00480 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
00481 if (strcmp(mime, "image/jpeg"))
00482 goto done;
00483
00484 avio_r8(pb);
00485 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
00486 filesize = avio_rl32(pb);
00487 if (!filesize)
00488 goto done;
00489
00490 st = avformat_new_stream(s, NULL);
00491 if (!st)
00492 goto done;
00493 av_dict_set(&st->metadata, "title", description, 0);
00494 st->codec->codec_id = CODEC_ID_MJPEG;
00495 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
00496 st->codec->extradata = av_mallocz(filesize);
00497 st->id = -1;
00498 if (!st->codec->extradata)
00499 goto done;
00500 st->codec->extradata_size = filesize;
00501 avio_read(pb, st->codec->extradata, filesize);
00502 done:
00503 avio_seek(pb, pos + length, SEEK_SET);
00504 }
00505
00506 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
00507 {
00508 int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
00509 char *buf = av_malloc(buf_size);
00510 if (!buf)
00511 return;
00512
00513 if (type == 0 && length == 4) {
00514 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
00515 } else if (type == 1) {
00516 avio_get_str16le(pb, length, buf, buf_size);
00517 if (!strlen(buf)) {
00518 av_free(buf);
00519 return;
00520 }
00521 } else if (type == 3 && length == 4) {
00522 strcpy(buf, avio_rl32(pb) ? "true" : "false");
00523 } else if (type == 4 && length == 8) {
00524 int64_t num = avio_rl64(pb);
00525 if (!strcmp(key, "WM/EncodingTime") ||
00526 !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
00527 filetime_to_iso8601(buf, buf_size, num);
00528 else if (!strcmp(key, "WM/WMRVEncodeTime") ||
00529 !strcmp(key, "WM/WMRVEndTime"))
00530 crazytime_to_iso8601(buf, buf_size, num);
00531 else if (!strcmp(key, "WM/WMRVExpirationDate"))
00532 oledate_to_iso8601(buf, buf_size, num);
00533 else if (!strcmp(key, "WM/WMRVBitrate"))
00534 snprintf(buf, buf_size, "%f", av_int2double(num));
00535 else
00536 snprintf(buf, buf_size, "%"PRIi64, num);
00537 } else if (type == 5 && length == 2) {
00538 snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
00539 } else if (type == 6 && length == 16) {
00540 ff_asf_guid guid;
00541 avio_read(pb, guid, 16);
00542 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
00543 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
00544 get_attachment(s, pb, length);
00545 av_freep(&buf);
00546 return;
00547 } else {
00548 av_freep(&buf);
00549 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
00550 avio_skip(pb, length);
00551 return;
00552 }
00553
00554 av_dict_set(&s->metadata, key, buf, 0);
00555 av_freep(&buf);
00556 }
00557
00561 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
00562 {
00563 ff_asf_guid guid;
00564 int length, type;
00565 while(!pb->eof_reached) {
00566 char key[1024];
00567 ff_get_guid(pb, &guid);
00568 type = avio_rl32(pb);
00569 length = avio_rl32(pb);
00570 if (!length)
00571 break;
00572 if (ff_guidcmp(&guid, metadata_guid)) {
00573 av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; "
00574 "remaining metadata entries ignored\n", ARG_GUID(guid));
00575 break;
00576 }
00577 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
00578 get_tag(s, pb, key, type, length);
00579 }
00580
00581 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
00582 }
00583
00588 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
00589 {
00590 WtvContext *wtv = s->priv_data;
00591 AVIOContext *pb = wtv->pb;
00592
00593 avio_skip(pb, 72);
00594 ff_get_bmp_header(pb, st);
00595
00596 return 72 + 40;
00597 }
00598
00602 static void parse_mpeg1waveformatex(AVStream *st)
00603 {
00604
00605 switch (AV_RL16(st->codec->extradata)) {
00606 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
00607 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
00608 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
00609 }
00610
00611 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2);
00612
00613
00614 switch (AV_RL16(st->codec->extradata + 6)) {
00615 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
00616 case 8 : st->codec->channels = 1; break;
00617 }
00618 }
00619
00625 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
00626 {
00627 if (st) {
00628 if (st->codec->extradata) {
00629 av_freep(&st->codec->extradata);
00630 st->codec->extradata_size = 0;
00631 }
00632 } else {
00633 WtvStream *wst = av_mallocz(sizeof(WtvStream));
00634 if (!wst)
00635 return NULL;
00636 st = avformat_new_stream(s, NULL);
00637 if (!st)
00638 return NULL;
00639 st->id = sid;
00640 st->priv_data = wst;
00641 }
00642 st->codec->codec_type = codec_type;
00643 st->need_parsing = AVSTREAM_PARSE_FULL;
00644 avpriv_set_pts_info(st, 64, 1, 10000000);
00645 return st;
00646 }
00647
00657 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
00658 ff_asf_guid mediatype, ff_asf_guid subtype,
00659 ff_asf_guid formattype, int size)
00660 {
00661 WtvContext *wtv = s->priv_data;
00662 AVIOContext *pb = wtv->pb;
00663 if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
00664 !ff_guidcmp(formattype, format_cpfilters_processed)) {
00665 ff_asf_guid actual_subtype;
00666 ff_asf_guid actual_formattype;
00667
00668 if (size < 32) {
00669 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
00670 avio_skip(pb, size);
00671 return NULL;
00672 }
00673
00674 avio_skip(pb, size - 32);
00675 ff_get_guid(pb, &actual_subtype);
00676 ff_get_guid(pb, &actual_formattype);
00677 avio_seek(pb, -size, SEEK_CUR);
00678
00679 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
00680 avio_skip(pb, 32);
00681 return st;
00682 } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
00683 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
00684 if (!st)
00685 return NULL;
00686 if (!ff_guidcmp(formattype, format_waveformatex)) {
00687 int ret = ff_get_wav_header(pb, st->codec, size);
00688 if (ret < 0)
00689 return NULL;
00690 } else {
00691 if (ff_guidcmp(formattype, format_none))
00692 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00693 avio_skip(pb, size);
00694 }
00695
00696 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00697 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
00698 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
00699 if (st->codec->extradata && st->codec->extradata_size >= 22)
00700 parse_mpeg1waveformatex(st);
00701 else
00702 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
00703 } else {
00704 st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
00705 if (st->codec->codec_id == CODEC_ID_NONE)
00706 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00707 }
00708 return st;
00709 } else if (!ff_guidcmp(mediatype, mediatype_video)) {
00710 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
00711 if (!st)
00712 return NULL;
00713 if (!ff_guidcmp(formattype, format_videoinfo2)) {
00714 int consumed = parse_videoinfoheader2(s, st);
00715 avio_skip(pb, FFMAX(size - consumed, 0));
00716 } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
00717 int consumed = parse_videoinfoheader2(s, st);
00718 avio_skip(pb, FFMAX(size - consumed, 0));
00719 } else {
00720 if (ff_guidcmp(formattype, format_none))
00721 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00722 avio_skip(pb, size);
00723 }
00724
00725 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00726 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
00727 } else {
00728 st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
00729 }
00730 if (st->codec->codec_id == CODEC_ID_NONE)
00731 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00732 return st;
00733 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
00734 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
00735 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00736 if (!st)
00737 return NULL;
00738 if (ff_guidcmp(formattype, format_none))
00739 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00740 avio_skip(pb, size);
00741 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
00742 return st;
00743 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
00744 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
00745 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00746 if (!st)
00747 return NULL;
00748 if (ff_guidcmp(formattype, format_none))
00749 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00750 avio_skip(pb, size);
00751 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
00752 return st;
00753 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
00754 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
00755 if (ff_guidcmp(formattype, format_none))
00756 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00757 avio_skip(pb, size);
00758 return NULL;
00759 }
00760
00761 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
00762 ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
00763 ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
00764 avio_skip(pb, size);
00765 return NULL;
00766 }
00767
00768 enum {
00769 SEEK_TO_DATA = 0,
00770 SEEK_TO_PTS,
00771 };
00772
00780 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
00781 {
00782 WtvContext *wtv = s->priv_data;
00783 AVIOContext *pb = wtv->pb;
00784 while (!pb->eof_reached) {
00785 ff_asf_guid g;
00786 int len, sid, consumed;
00787
00788 ff_get_guid(pb, &g);
00789 len = avio_rl32(pb);
00790 if (len < 32)
00791 break;
00792 sid = avio_rl32(pb) & 0x7FFF;
00793 avio_skip(pb, 8);
00794 consumed = 32;
00795
00796 if (!ff_guidcmp(g, stream_guid)) {
00797 if (ff_find_stream_index(s, sid) < 0) {
00798 ff_asf_guid mediatype, subtype, formattype;
00799 int size;
00800 avio_skip(pb, 28);
00801 ff_get_guid(pb, &mediatype);
00802 ff_get_guid(pb, &subtype);
00803 avio_skip(pb, 12);
00804 ff_get_guid(pb, &formattype);
00805 size = avio_rl32(pb);
00806 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
00807 consumed += 92 + size;
00808 }
00809 } else if (!ff_guidcmp(g, stream2_guid)) {
00810 int stream_index = ff_find_stream_index(s, sid);
00811 if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
00812 ff_asf_guid mediatype, subtype, formattype;
00813 int size;
00814 avio_skip(pb, 12);
00815 ff_get_guid(pb, &mediatype);
00816 ff_get_guid(pb, &subtype);
00817 avio_skip(pb, 12);
00818 ff_get_guid(pb, &formattype);
00819 size = avio_rl32(pb);
00820 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
00821 consumed += 76 + size;
00822 }
00823 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
00824 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00825 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
00826 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
00827 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
00828 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
00829 int stream_index = ff_find_stream_index(s, sid);
00830 if (stream_index >= 0) {
00831 AVStream *st = s->streams[stream_index];
00832 uint8_t buf[258];
00833 const uint8_t *pbuf = buf;
00834 int buf_size;
00835
00836 avio_skip(pb, 8);
00837 consumed += 8;
00838 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00839 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
00840 avio_skip(pb, 6);
00841 consumed += 6;
00842 }
00843
00844 buf_size = FFMIN(len - consumed, sizeof(buf));
00845 avio_read(pb, buf, buf_size);
00846 consumed += buf_size;
00847 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
00848 }
00849 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
00850 int stream_index = ff_find_stream_index(s, sid);
00851 if (stream_index >= 0) {
00852 AVStream *st = s->streams[stream_index];
00853 int audio_type;
00854 avio_skip(pb, 8);
00855 audio_type = avio_r8(pb);
00856 if (audio_type == 2)
00857 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
00858 else if (audio_type == 3)
00859 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00860 consumed += 9;
00861 }
00862 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
00863 int stream_index = ff_find_stream_index(s, sid);
00864 if (stream_index >= 0) {
00865 avio_skip(pb, 12);
00866 if (avio_rl32(pb))
00867 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
00868 consumed += 16;
00869 }
00870 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
00871 int stream_index = ff_find_stream_index(s, sid);
00872 if (stream_index >= 0) {
00873 AVStream *st = s->streams[stream_index];
00874 uint8_t language[4];
00875 avio_skip(pb, 12);
00876 avio_read(pb, language, 3);
00877 if (language[0]) {
00878 language[3] = 0;
00879 av_dict_set(&st->metadata, "language", language, 0);
00880 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
00881 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00882 }
00883 consumed += 15;
00884 }
00885 } else if (!ff_guidcmp(g, timestamp_guid)) {
00886 int stream_index = ff_find_stream_index(s, sid);
00887 if (stream_index >= 0) {
00888 avio_skip(pb, 8);
00889 wtv->pts = avio_rl64(pb);
00890 consumed += 16;
00891 if (wtv->pts == -1)
00892 wtv->pts = AV_NOPTS_VALUE;
00893 else {
00894 wtv->last_valid_pts = wtv->pts;
00895 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
00896 wtv->epoch = wtv->pts;
00897 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
00898 #define WTV_PAD8(x) (((x) + 7) & ~7)
00899 avio_skip(pb, WTV_PAD8(len) - consumed);
00900 return 0;
00901 }
00902 }
00903 }
00904 } else if (!ff_guidcmp(g, data_guid)) {
00905 int stream_index = ff_find_stream_index(s, sid);
00906 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
00907 WtvStream *wst = s->streams[stream_index]->priv_data;
00908 wst->seen_data = 1;
00909 if (len_ptr) {
00910 *len_ptr = len;
00911 }
00912 return stream_index;
00913 }
00914 } else if (
00915 !ff_guidcmp(g, (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) ||
00916 !ff_guidcmp(g, (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
00917 !ff_guidcmp(g, (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
00918 !ff_guidcmp(g, (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
00919 !ff_guidcmp(g, (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
00920 !ff_guidcmp(g, (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
00921 !ff_guidcmp(g, (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
00922 !ff_guidcmp(g, (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
00923 !ff_guidcmp(g, (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
00924 !ff_guidcmp(g, (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
00925 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
00926 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
00927 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
00928 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00929 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
00930 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00931 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00932 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
00933
00934 } else
00935 av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
00936
00937 avio_skip(pb, WTV_PAD8(len) - consumed);
00938 }
00939 return AVERROR_EOF;
00940 }
00941
00942
00943 #define _ , 0,
00944 static const uint8_t timeline_le16[] =
00945 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
00946 static const uint8_t table_0_entries_legacy_attrib_le16[] =
00947 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
00948 static const uint8_t table_0_entries_time_le16[] =
00949 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
00950 static const uint8_t timeline_table_0_entries_Events_le16[] =
00951 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0};
00952 #undef _
00953
00954 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
00955 {
00956 WtvContext *wtv = s->priv_data;
00957 int root_sector, root_size;
00958 uint8_t root[WTV_SECTOR_SIZE];
00959 AVIOContext *pb;
00960 int64_t timeline_pos;
00961 int ret;
00962
00963 wtv->epoch =
00964 wtv->pts =
00965 wtv->last_valid_pts = AV_NOPTS_VALUE;
00966
00967
00968 avio_skip(s->pb, 0x30);
00969 root_size = avio_rl32(s->pb);
00970 if (root_size > sizeof(root)) {
00971 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
00972 return AVERROR_INVALIDDATA;
00973 }
00974 avio_skip(s->pb, 4);
00975 root_sector = avio_rl32(s->pb);
00976
00977 avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
00978 root_size = avio_read(s->pb, root, root_size);
00979 if (root_size < 0)
00980 return AVERROR_INVALIDDATA;
00981
00982
00983 wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
00984 if (!wtv->pb) {
00985 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
00986 return AVERROR_INVALIDDATA;
00987 }
00988
00989 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
00990 if (ret < 0)
00991 return ret;
00992 avio_seek(wtv->pb, -32, SEEK_CUR);
00993
00994 timeline_pos = avio_tell(s->pb);
00995
00996
00997 pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
00998 if (pb) {
00999 parse_legacy_attrib(s, pb);
01000 wtvfile_close(pb);
01001 }
01002
01003
01004 if (s->nb_streams) {
01005 AVStream *st = s->streams[0];
01006 pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
01007 if (pb) {
01008 while(1) {
01009 uint64_t timestamp = avio_rl64(pb);
01010 uint64_t frame_nb = avio_rl64(pb);
01011 if (pb->eof_reached)
01012 break;
01013 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
01014 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
01015 }
01016 wtvfile_close(pb);
01017
01018 if (wtv->nb_index_entries) {
01019 pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
01020 if (pb) {
01021 int i;
01022 while (1) {
01023 uint64_t frame_nb = avio_rl64(pb);
01024 uint64_t position = avio_rl64(pb);
01025 if (pb->eof_reached)
01026 break;
01027 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
01028 AVIndexEntry *e = wtv->index_entries + i;
01029 if (frame_nb > e->size)
01030 break;
01031 if (position > e->pos)
01032 e->pos = position;
01033 }
01034 }
01035 wtvfile_close(pb);
01036 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
01037 }
01038 }
01039 }
01040 }
01041
01042 avio_seek(s->pb, timeline_pos, SEEK_SET);
01043 return 0;
01044 }
01045
01046 static int read_packet(AVFormatContext *s, AVPacket *pkt)
01047 {
01048 WtvContext *wtv = s->priv_data;
01049 AVIOContext *pb = wtv->pb;
01050 int stream_index, len, ret;
01051
01052 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
01053 if (stream_index < 0)
01054 return stream_index;
01055
01056 ret = av_get_packet(pb, pkt, len - 32);
01057 if (ret < 0)
01058 return ret;
01059 pkt->stream_index = stream_index;
01060 pkt->pts = wtv->pts;
01061 avio_skip(pb, WTV_PAD8(len) - len);
01062 return 0;
01063 }
01064
01065 static int read_seek(AVFormatContext *s, int stream_index,
01066 int64_t ts, int flags)
01067 {
01068 WtvContext *wtv = s->priv_data;
01069 AVIOContext *pb = wtv->pb;
01070 AVStream *st = s->streams[0];
01071 int64_t ts_relative;
01072 int i;
01073
01074 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
01075 return AVERROR(ENOSYS);
01076
01077
01078
01079 ts_relative = ts;
01080 if (wtv->epoch != AV_NOPTS_VALUE)
01081 ts_relative -= wtv->epoch;
01082
01083 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
01084 if (i < 0) {
01085 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
01086 avio_seek(pb, 0, SEEK_SET);
01087 else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
01088 avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
01089 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
01090 return AVERROR(ERANGE);
01091 return 0;
01092 }
01093 wtv->pts = wtv->index_entries[i].timestamp;
01094 if (wtv->epoch != AV_NOPTS_VALUE)
01095 wtv->pts += wtv->epoch;
01096 wtv->last_valid_pts = wtv->pts;
01097 avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
01098 return 0;
01099 }
01100
01101 static int read_close(AVFormatContext *s)
01102 {
01103 WtvContext *wtv = s->priv_data;
01104 av_free(wtv->index_entries);
01105 wtvfile_close(wtv->pb);
01106 return 0;
01107 }
01108
01109 AVInputFormat ff_wtv_demuxer = {
01110 .name = "wtv",
01111 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
01112 .priv_data_size = sizeof(WtvContext),
01113 .read_probe = read_probe,
01114 .read_header = read_header,
01115 .read_packet = read_packet,
01116 .read_seek = read_seek,
01117 .read_close = read_close,
01118 .flags = AVFMT_SHOW_IDS,
01119 };