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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 (buf + 48 + name_size > buf_end) {
00277 av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
00278 break;
00279 }
00280 first_sector = AV_RL32(buf + 40 + name_size);
00281 depth = AV_RL32(buf + 44 + name_size);
00282
00283
00284 name = buf + 40;
00285 if (name_size >= filename_size &&
00286 !memcmp(name, filename, filename_size) &&
00287 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
00288 return wtvfile_open_sector(first_sector, file_length, depth, s);
00289
00290 buf += dir_length;
00291 }
00292 return 0;
00293 }
00294
00295 #define wtvfile_open(s, buf, buf_size, filename) \
00296 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
00297
00301 static void wtvfile_close(AVIOContext *pb)
00302 {
00303 WtvFile *wf = pb->opaque;
00304 av_free(wf->sectors);
00305 av_free(wf);
00306 av_free(pb->buffer);
00307 av_free(pb);
00308 }
00309
00310
00311
00312
00313
00314
00315
00316 typedef struct {
00317 int seen_data;
00318 } WtvStream;
00319
00320 typedef struct {
00321 AVIOContext *pb;
00322 int64_t epoch;
00323 int64_t pts;
00324 int64_t last_valid_pts;
00326
00327
00328 AVIndexEntry *index_entries;
00329 int nb_index_entries;
00330 unsigned int index_entries_allocated_size;
00331 } WtvContext;
00332
00333 typedef struct {
00334 enum CodecID id;
00335 ff_asf_guid guid;
00336 } AVCodecGuid;
00337
00338 static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
00339 {
00340 int i;
00341 for (i = 0; guids[i].id != CODEC_ID_NONE; i++) {
00342 if (!ff_guidcmp(guids[i].guid, guid))
00343 return guids[i].id;
00344 }
00345 return CODEC_ID_NONE;
00346 }
00347
00348
00349 static const ff_asf_guid wtv_guid =
00350 {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00351 static const ff_asf_guid metadata_guid =
00352 {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
00353 static const ff_asf_guid timestamp_guid =
00354 {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
00355 static const ff_asf_guid data_guid =
00356 {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00357 static const ff_asf_guid stream_guid =
00358 {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
00359 static const ff_asf_guid stream2_guid =
00360 {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
00361 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
00362 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
00363 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
00364 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
00365 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
00366 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
00367 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
00368 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
00369 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
00370 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
00371 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
00372 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
00373 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
00374 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
00375 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
00376 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
00377 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
00378 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
00379
00380
00381
00382 #define MEDIASUBTYPE_BASE_GUID \
00383 0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
00384
00385
00386 static const ff_asf_guid mediatype_audio =
00387 {'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
00388 static const ff_asf_guid mediatype_video =
00389 {'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
00390 static const ff_asf_guid mediasubtype_mpeg1payload =
00391 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
00392 static const ff_asf_guid mediatype_mpeg2_sections =
00393 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
00394 static const ff_asf_guid mediatype_mpeg2_pes =
00395 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
00396 static const ff_asf_guid mediatype_mstvcaption =
00397 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
00398
00399
00400 static const ff_asf_guid mediasubtype_cpfilters_processed =
00401 {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
00402 static const ff_asf_guid mediasubtype_dvb_subtitle =
00403 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
00404 static const ff_asf_guid mediasubtype_teletext =
00405 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
00406 static const ff_asf_guid mediasubtype_dtvccdata =
00407 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
00408 static const ff_asf_guid mediasubtype_mpeg2_sections =
00409 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
00410
00411
00412 static const ff_asf_guid format_cpfilters_processed =
00413 {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
00414 static const ff_asf_guid format_waveformatex =
00415 {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
00416 static const ff_asf_guid format_videoinfo2 =
00417 {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
00418 static const ff_asf_guid format_mpeg2_video =
00419 {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
00420 static const ff_asf_guid format_none =
00421 {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
00422
00423 static const AVCodecGuid video_guids[] = {
00424 {CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00425 {CODEC_ID_NONE}
00426 };
00427
00428 static const AVCodecGuid audio_guids[] = {
00429 {CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00430 {CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
00431 {CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00432 {CODEC_ID_NONE}
00433 };
00434
00435 static int read_probe(AVProbeData *p)
00436 {
00437 return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
00438 }
00439
00443 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
00444 {
00445 time_t t = (value / 10000000LL) - 11644473600LL;
00446 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00447 }
00448
00452 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
00453 {
00454 time_t t = (value / 10000000LL) - 719162LL*86400LL;
00455 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00456 }
00457
00461 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
00462 {
00463 time_t t = 631112400LL + 86400*av_int2double(value);
00464 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
00465 }
00466
00467 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
00468 {
00469 char mime[1024];
00470 char description[1024];
00471 unsigned int filesize;
00472 AVStream *st;
00473 int64_t pos = avio_tell(pb);
00474
00475 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
00476 if (strcmp(mime, "image/jpeg"))
00477 goto done;
00478
00479 avio_r8(pb);
00480 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
00481 filesize = avio_rl32(pb);
00482 if (!filesize)
00483 goto done;
00484
00485 st = avformat_new_stream(s, NULL);
00486 if (!st)
00487 goto done;
00488 av_dict_set(&st->metadata, "title", description, 0);
00489 st->codec->codec_id = CODEC_ID_MJPEG;
00490 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
00491 st->codec->extradata = av_mallocz(filesize);
00492 if (!st->codec->extradata)
00493 goto done;
00494 st->codec->extradata_size = filesize;
00495 avio_read(pb, st->codec->extradata, filesize);
00496 done:
00497 avio_seek(pb, pos + length, SEEK_SET);
00498 }
00499
00500 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
00501 {
00502 int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
00503 char *buf = av_malloc(buf_size);
00504 if (!buf)
00505 return;
00506
00507 if (type == 0 && length == 4) {
00508 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
00509 } else if (type == 1) {
00510 avio_get_str16le(pb, length, buf, buf_size);
00511 if (!strlen(buf)) {
00512 av_free(buf);
00513 return;
00514 }
00515 } else if (type == 3 && length == 4) {
00516 strcpy(buf, avio_rl32(pb) ? "true" : "false");
00517 } else if (type == 4 && length == 8) {
00518 int64_t num = avio_rl64(pb);
00519 if (!strcmp(key, "WM/EncodingTime") ||
00520 !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
00521 filetime_to_iso8601(buf, buf_size, num);
00522 else if (!strcmp(key, "WM/WMRVEncodeTime") ||
00523 !strcmp(key, "WM/WMRVEndTime"))
00524 crazytime_to_iso8601(buf, buf_size, num);
00525 else if (!strcmp(key, "WM/WMRVExpirationDate"))
00526 oledate_to_iso8601(buf, buf_size, num);
00527 else if (!strcmp(key, "WM/WMRVBitrate"))
00528 snprintf(buf, buf_size, "%f", av_int2double(num));
00529 else
00530 snprintf(buf, buf_size, "%"PRIi64, num);
00531 } else if (type == 5 && length == 2) {
00532 snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
00533 } else if (type == 6 && length == 16) {
00534 ff_asf_guid guid;
00535 avio_read(pb, guid, 16);
00536 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
00537 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
00538 get_attachment(s, pb, length);
00539 av_freep(&buf);
00540 return;
00541 } else {
00542 av_freep(&buf);
00543 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
00544 avio_skip(pb, length);
00545 return;
00546 }
00547
00548 av_dict_set(&s->metadata, key, buf, 0);
00549 av_freep(&buf);
00550 }
00551
00555 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
00556 {
00557 ff_asf_guid guid;
00558 int length, type;
00559 while(!pb->eof_reached) {
00560 char key[1024];
00561 ff_get_guid(pb, &guid);
00562 type = avio_rl32(pb);
00563 length = avio_rl32(pb);
00564 if (!length)
00565 break;
00566 if (ff_guidcmp(&guid, metadata_guid)) {
00567 av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; "
00568 "remaining metadata entries ignored\n", ARG_GUID(guid));
00569 break;
00570 }
00571 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
00572 get_tag(s, pb, key, type, length);
00573 }
00574
00575 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
00576 }
00577
00582 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
00583 {
00584 WtvContext *wtv = s->priv_data;
00585 AVIOContext *pb = wtv->pb;
00586
00587 avio_skip(pb, 72);
00588 ff_get_bmp_header(pb, st);
00589
00590 return 72 + 40;
00591 }
00592
00596 static void parse_mpeg1waveformatex(AVStream *st)
00597 {
00598
00599 switch (AV_RL16(st->codec->extradata)) {
00600 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
00601 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
00602 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
00603 }
00604
00605 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2);
00606
00607
00608 switch (AV_RL16(st->codec->extradata + 6)) {
00609 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
00610 case 8 : st->codec->channels = 1; break;
00611 }
00612 }
00613
00619 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
00620 {
00621 if (st) {
00622 if (st->codec->extradata) {
00623 av_freep(&st->codec->extradata);
00624 st->codec->extradata_size = 0;
00625 }
00626 } else {
00627 WtvStream *wst = av_mallocz(sizeof(WtvStream));
00628 if (!wst)
00629 return NULL;
00630 st = avformat_new_stream(s, NULL);
00631 if (!st)
00632 return NULL;
00633 st->id = sid;
00634 st->priv_data = wst;
00635 }
00636 st->codec->codec_type = codec_type;
00637 st->need_parsing = AVSTREAM_PARSE_FULL;
00638 avpriv_set_pts_info(st, 64, 1, 10000000);
00639 return st;
00640 }
00641
00651 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
00652 ff_asf_guid mediatype, ff_asf_guid subtype,
00653 ff_asf_guid formattype, int size)
00654 {
00655 WtvContext *wtv = s->priv_data;
00656 AVIOContext *pb = wtv->pb;
00657 if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
00658 !ff_guidcmp(formattype, format_cpfilters_processed)) {
00659 ff_asf_guid actual_subtype;
00660 ff_asf_guid actual_formattype;
00661
00662 if (size < 32) {
00663 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
00664 avio_skip(pb, size);
00665 return NULL;
00666 }
00667
00668 avio_skip(pb, size - 32);
00669 ff_get_guid(pb, &actual_subtype);
00670 ff_get_guid(pb, &actual_formattype);
00671 avio_seek(pb, -size, SEEK_CUR);
00672
00673 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
00674 avio_skip(pb, 32);
00675 return st;
00676 } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
00677 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
00678 if (!st)
00679 return NULL;
00680 if (!ff_guidcmp(formattype, format_waveformatex)) {
00681 int ret = ff_get_wav_header(pb, st->codec, size);
00682 if (ret < 0)
00683 return NULL;
00684 } else {
00685 if (ff_guidcmp(formattype, format_none))
00686 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00687 avio_skip(pb, size);
00688 }
00689
00690 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00691 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
00692 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
00693 if (st->codec->extradata && st->codec->extradata_size >= 22)
00694 parse_mpeg1waveformatex(st);
00695 else
00696 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
00697 } else {
00698 st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
00699 if (st->codec->codec_id == CODEC_ID_NONE)
00700 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00701 }
00702 return st;
00703 } else if (!ff_guidcmp(mediatype, mediatype_video)) {
00704 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
00705 if (!st)
00706 return NULL;
00707 if (!ff_guidcmp(formattype, format_videoinfo2)) {
00708 int consumed = parse_videoinfoheader2(s, st);
00709 avio_skip(pb, FFMAX(size - consumed, 0));
00710 } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
00711 int consumed = parse_videoinfoheader2(s, st);
00712 avio_skip(pb, FFMAX(size - consumed, 0));
00713 } else {
00714 if (ff_guidcmp(formattype, format_none))
00715 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00716 avio_skip(pb, size);
00717 }
00718
00719 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00720 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
00721 } else {
00722 st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
00723 }
00724 if (st->codec->codec_id == CODEC_ID_NONE)
00725 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00726 return st;
00727 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
00728 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
00729 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00730 if (!st)
00731 return NULL;
00732 if (ff_guidcmp(formattype, format_none))
00733 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00734 avio_skip(pb, size);
00735 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
00736 return st;
00737 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
00738 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
00739 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00740 if (!st)
00741 return NULL;
00742 if (ff_guidcmp(formattype, format_none))
00743 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00744 avio_skip(pb, size);
00745 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
00746 return st;
00747 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
00748 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
00749 if (ff_guidcmp(formattype, format_none))
00750 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00751 avio_skip(pb, size);
00752 return NULL;
00753 }
00754
00755 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
00756 ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
00757 ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
00758 avio_skip(pb, size);
00759 return NULL;
00760 }
00761
00762 enum {
00763 SEEK_TO_DATA = 0,
00764 SEEK_TO_PTS,
00765 };
00766
00774 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
00775 {
00776 WtvContext *wtv = s->priv_data;
00777 AVIOContext *pb = wtv->pb;
00778 while (!pb->eof_reached) {
00779 ff_asf_guid g;
00780 int len, sid, consumed;
00781
00782 ff_get_guid(pb, &g);
00783 len = avio_rl32(pb);
00784 if (len < 32)
00785 break;
00786 sid = avio_rl32(pb) & 0x7FFF;
00787 avio_skip(pb, 8);
00788 consumed = 32;
00789
00790 if (!ff_guidcmp(g, stream_guid)) {
00791 if (ff_find_stream_index(s, sid) < 0) {
00792 ff_asf_guid mediatype, subtype, formattype;
00793 int size;
00794 avio_skip(pb, 28);
00795 ff_get_guid(pb, &mediatype);
00796 ff_get_guid(pb, &subtype);
00797 avio_skip(pb, 12);
00798 ff_get_guid(pb, &formattype);
00799 size = avio_rl32(pb);
00800 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
00801 consumed += 92 + size;
00802 }
00803 } else if (!ff_guidcmp(g, stream2_guid)) {
00804 int stream_index = ff_find_stream_index(s, sid);
00805 if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
00806 ff_asf_guid mediatype, subtype, formattype;
00807 int size;
00808 avio_skip(pb, 12);
00809 ff_get_guid(pb, &mediatype);
00810 ff_get_guid(pb, &subtype);
00811 avio_skip(pb, 12);
00812 ff_get_guid(pb, &formattype);
00813 size = avio_rl32(pb);
00814 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
00815 consumed += 76 + size;
00816 }
00817 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
00818 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00819 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
00820 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
00821 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
00822 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
00823 int stream_index = ff_find_stream_index(s, sid);
00824 if (stream_index >= 0) {
00825 AVStream *st = s->streams[stream_index];
00826 uint8_t buf[258];
00827 const uint8_t *pbuf = buf;
00828 int buf_size;
00829
00830 avio_skip(pb, 8);
00831 consumed += 8;
00832 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00833 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
00834 avio_skip(pb, 6);
00835 consumed += 6;
00836 }
00837
00838 buf_size = FFMIN(len - consumed, sizeof(buf));
00839 avio_read(pb, buf, buf_size);
00840 consumed += buf_size;
00841 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
00842 }
00843 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
00844 int stream_index = ff_find_stream_index(s, sid);
00845 if (stream_index >= 0) {
00846 AVStream *st = s->streams[stream_index];
00847 int audio_type;
00848 avio_skip(pb, 8);
00849 audio_type = avio_r8(pb);
00850 if (audio_type == 2)
00851 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
00852 else if (audio_type == 3)
00853 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00854 consumed += 9;
00855 }
00856 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
00857 int stream_index = ff_find_stream_index(s, sid);
00858 if (stream_index >= 0) {
00859 avio_skip(pb, 12);
00860 if (avio_rl32(pb))
00861 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
00862 consumed += 16;
00863 }
00864 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
00865 int stream_index = ff_find_stream_index(s, sid);
00866 if (stream_index >= 0) {
00867 AVStream *st = s->streams[stream_index];
00868 uint8_t language[4];
00869 avio_skip(pb, 12);
00870 avio_read(pb, language, 3);
00871 if (language[0]) {
00872 language[3] = 0;
00873 av_dict_set(&st->metadata, "language", language, 0);
00874 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
00875 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00876 }
00877 consumed += 15;
00878 }
00879 } else if (!ff_guidcmp(g, timestamp_guid)) {
00880 int stream_index = ff_find_stream_index(s, sid);
00881 if (stream_index >= 0) {
00882 avio_skip(pb, 8);
00883 wtv->pts = avio_rl64(pb);
00884 consumed += 16;
00885 if (wtv->pts == -1)
00886 wtv->pts = AV_NOPTS_VALUE;
00887 else {
00888 wtv->last_valid_pts = wtv->pts;
00889 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
00890 wtv->epoch = wtv->pts;
00891 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
00892 #define WTV_PAD8(x) (((x) + 7) & ~7)
00893 avio_skip(pb, WTV_PAD8(len) - consumed);
00894 return 0;
00895 }
00896 }
00897 }
00898 } else if (!ff_guidcmp(g, data_guid)) {
00899 int stream_index = ff_find_stream_index(s, sid);
00900 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
00901 WtvStream *wst = s->streams[stream_index]->priv_data;
00902 wst->seen_data = 1;
00903 if (len_ptr) {
00904 *len_ptr = len;
00905 }
00906 return stream_index;
00907 }
00908 } else if (
00909 !ff_guidcmp(g, (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) ||
00910 !ff_guidcmp(g, (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
00911 !ff_guidcmp(g, (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
00912 !ff_guidcmp(g, (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
00913 !ff_guidcmp(g, (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
00914 !ff_guidcmp(g, (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
00915 !ff_guidcmp(g, (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
00916 !ff_guidcmp(g, (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
00917 !ff_guidcmp(g, (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
00918 !ff_guidcmp(g, (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
00919 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
00920 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
00921 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
00922 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00923 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
00924 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00925 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00926 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
00927
00928 } else
00929 av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
00930
00931 avio_skip(pb, WTV_PAD8(len) - consumed);
00932 }
00933 return AVERROR_EOF;
00934 }
00935
00936
00937 #define _ , 0,
00938 static const uint8_t timeline_le16[] =
00939 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
00940 static const uint8_t table_0_entries_legacy_attrib_le16[] =
00941 {'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};
00942 static const uint8_t table_0_entries_time_le16[] =
00943 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
00944 static const uint8_t timeline_table_0_entries_Events_le16[] =
00945 {'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};
00946 #undef _
00947
00948 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
00949 {
00950 WtvContext *wtv = s->priv_data;
00951 int root_sector, root_size;
00952 uint8_t root[WTV_SECTOR_SIZE];
00953 AVIOContext *pb;
00954 int64_t timeline_pos;
00955 int ret;
00956
00957 wtv->epoch =
00958 wtv->pts =
00959 wtv->last_valid_pts = AV_NOPTS_VALUE;
00960
00961
00962 avio_skip(s->pb, 0x30);
00963 root_size = avio_rl32(s->pb);
00964 if (root_size > sizeof(root)) {
00965 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
00966 return AVERROR_INVALIDDATA;
00967 }
00968 avio_skip(s->pb, 4);
00969 root_sector = avio_rl32(s->pb);
00970
00971 avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
00972 root_size = avio_read(s->pb, root, root_size);
00973 if (root_size < 0)
00974 return AVERROR_INVALIDDATA;
00975
00976
00977 wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
00978 if (!wtv->pb) {
00979 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
00980 return AVERROR_INVALIDDATA;
00981 }
00982
00983 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
00984 if (ret < 0)
00985 return ret;
00986 avio_seek(wtv->pb, -32, SEEK_CUR);
00987
00988 timeline_pos = avio_tell(s->pb);
00989
00990
00991 pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
00992 if (pb) {
00993 parse_legacy_attrib(s, pb);
00994 wtvfile_close(pb);
00995 }
00996
00997
00998 if (s->nb_streams) {
00999 AVStream *st = s->streams[0];
01000 pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
01001 if (pb) {
01002 while(1) {
01003 uint64_t timestamp = avio_rl64(pb);
01004 uint64_t frame_nb = avio_rl64(pb);
01005 if (pb->eof_reached)
01006 break;
01007 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
01008 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
01009 }
01010 wtvfile_close(pb);
01011
01012 if (wtv->nb_index_entries) {
01013 pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
01014 if (pb) {
01015 int i;
01016 while (1) {
01017 uint64_t frame_nb = avio_rl64(pb);
01018 uint64_t position = avio_rl64(pb);
01019 if (pb->eof_reached)
01020 break;
01021 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
01022 AVIndexEntry *e = wtv->index_entries + i;
01023 if (frame_nb > e->size)
01024 break;
01025 if (position > e->pos)
01026 e->pos = position;
01027 }
01028 }
01029 wtvfile_close(pb);
01030 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
01031 }
01032 }
01033 }
01034 }
01035
01036 avio_seek(s->pb, timeline_pos, SEEK_SET);
01037 return 0;
01038 }
01039
01040 static int read_packet(AVFormatContext *s, AVPacket *pkt)
01041 {
01042 WtvContext *wtv = s->priv_data;
01043 AVIOContext *pb = wtv->pb;
01044 int stream_index, len, ret;
01045
01046 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
01047 if (stream_index < 0)
01048 return stream_index;
01049
01050 ret = av_get_packet(pb, pkt, len - 32);
01051 if (ret < 0)
01052 return ret;
01053 pkt->stream_index = stream_index;
01054 pkt->pts = wtv->pts;
01055 avio_skip(pb, WTV_PAD8(len) - len);
01056 return 0;
01057 }
01058
01059 static int read_seek(AVFormatContext *s, int stream_index,
01060 int64_t ts, int flags)
01061 {
01062 WtvContext *wtv = s->priv_data;
01063 AVIOContext *pb = wtv->pb;
01064 AVStream *st = s->streams[0];
01065 int64_t ts_relative;
01066 int i;
01067
01068 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
01069 return AVERROR(ENOSYS);
01070
01071
01072
01073 ts_relative = ts;
01074 if (wtv->epoch != AV_NOPTS_VALUE)
01075 ts_relative -= wtv->epoch;
01076
01077 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
01078 if (i < 0) {
01079 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
01080 avio_seek(pb, 0, SEEK_SET);
01081 else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
01082 avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
01083 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
01084 return AVERROR(ERANGE);
01085 return 0;
01086 }
01087 wtv->pts = wtv->index_entries[i].timestamp;
01088 if (wtv->epoch != AV_NOPTS_VALUE)
01089 wtv->pts += wtv->epoch;
01090 wtv->last_valid_pts = wtv->pts;
01091 avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
01092 return 0;
01093 }
01094
01095 static int read_close(AVFormatContext *s)
01096 {
01097 WtvContext *wtv = s->priv_data;
01098 av_free(wtv->index_entries);
01099 wtvfile_close(wtv->pb);
01100 return 0;
01101 }
01102
01103 AVInputFormat ff_wtv_demuxer = {
01104 .name = "wtv",
01105 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
01106 .priv_data_size = sizeof(WtvContext),
01107 .read_probe = read_probe,
01108 .read_header = read_header,
01109 .read_packet = read_packet,
01110 .read_seek = read_seek,
01111 .read_close = read_close,
01112 .flags = AVFMT_SHOW_IDS,
01113 };