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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 st->id = -1;
00493 if (!st->codec->extradata)
00494 goto done;
00495 st->codec->extradata_size = filesize;
00496 avio_read(pb, st->codec->extradata, filesize);
00497 done:
00498 avio_seek(pb, pos + length, SEEK_SET);
00499 }
00500
00501 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
00502 {
00503 int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
00504 char *buf = av_malloc(buf_size);
00505 if (!buf)
00506 return;
00507
00508 if (type == 0 && length == 4) {
00509 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
00510 } else if (type == 1) {
00511 avio_get_str16le(pb, length, buf, buf_size);
00512 if (!strlen(buf)) {
00513 av_free(buf);
00514 return;
00515 }
00516 } else if (type == 3 && length == 4) {
00517 strcpy(buf, avio_rl32(pb) ? "true" : "false");
00518 } else if (type == 4 && length == 8) {
00519 int64_t num = avio_rl64(pb);
00520 if (!strcmp(key, "WM/EncodingTime") ||
00521 !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
00522 filetime_to_iso8601(buf, buf_size, num);
00523 else if (!strcmp(key, "WM/WMRVEncodeTime") ||
00524 !strcmp(key, "WM/WMRVEndTime"))
00525 crazytime_to_iso8601(buf, buf_size, num);
00526 else if (!strcmp(key, "WM/WMRVExpirationDate"))
00527 oledate_to_iso8601(buf, buf_size, num);
00528 else if (!strcmp(key, "WM/WMRVBitrate"))
00529 snprintf(buf, buf_size, "%f", av_int2double(num));
00530 else
00531 snprintf(buf, buf_size, "%"PRIi64, num);
00532 } else if (type == 5 && length == 2) {
00533 snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
00534 } else if (type == 6 && length == 16) {
00535 ff_asf_guid guid;
00536 avio_read(pb, guid, 16);
00537 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
00538 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
00539 get_attachment(s, pb, length);
00540 av_freep(&buf);
00541 return;
00542 } else {
00543 av_freep(&buf);
00544 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
00545 avio_skip(pb, length);
00546 return;
00547 }
00548
00549 av_dict_set(&s->metadata, key, buf, 0);
00550 av_freep(&buf);
00551 }
00552
00556 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
00557 {
00558 ff_asf_guid guid;
00559 int length, type;
00560 while(!pb->eof_reached) {
00561 char key[1024];
00562 ff_get_guid(pb, &guid);
00563 type = avio_rl32(pb);
00564 length = avio_rl32(pb);
00565 if (!length)
00566 break;
00567 if (ff_guidcmp(&guid, metadata_guid)) {
00568 av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; "
00569 "remaining metadata entries ignored\n", ARG_GUID(guid));
00570 break;
00571 }
00572 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
00573 get_tag(s, pb, key, type, length);
00574 }
00575
00576 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
00577 }
00578
00583 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
00584 {
00585 WtvContext *wtv = s->priv_data;
00586 AVIOContext *pb = wtv->pb;
00587
00588 avio_skip(pb, 72);
00589 ff_get_bmp_header(pb, st);
00590
00591 return 72 + 40;
00592 }
00593
00597 static void parse_mpeg1waveformatex(AVStream *st)
00598 {
00599
00600 switch (AV_RL16(st->codec->extradata)) {
00601 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
00602 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
00603 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
00604 }
00605
00606 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2);
00607
00608
00609 switch (AV_RL16(st->codec->extradata + 6)) {
00610 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
00611 case 8 : st->codec->channels = 1; break;
00612 }
00613 }
00614
00620 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
00621 {
00622 if (st) {
00623 if (st->codec->extradata) {
00624 av_freep(&st->codec->extradata);
00625 st->codec->extradata_size = 0;
00626 }
00627 } else {
00628 WtvStream *wst = av_mallocz(sizeof(WtvStream));
00629 if (!wst)
00630 return NULL;
00631 st = avformat_new_stream(s, NULL);
00632 if (!st)
00633 return NULL;
00634 st->id = sid;
00635 st->priv_data = wst;
00636 }
00637 st->codec->codec_type = codec_type;
00638 st->need_parsing = AVSTREAM_PARSE_FULL;
00639 avpriv_set_pts_info(st, 64, 1, 10000000);
00640 return st;
00641 }
00642
00652 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
00653 ff_asf_guid mediatype, ff_asf_guid subtype,
00654 ff_asf_guid formattype, int size)
00655 {
00656 WtvContext *wtv = s->priv_data;
00657 AVIOContext *pb = wtv->pb;
00658 if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
00659 !ff_guidcmp(formattype, format_cpfilters_processed)) {
00660 ff_asf_guid actual_subtype;
00661 ff_asf_guid actual_formattype;
00662
00663 if (size < 32) {
00664 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
00665 avio_skip(pb, size);
00666 return NULL;
00667 }
00668
00669 avio_skip(pb, size - 32);
00670 ff_get_guid(pb, &actual_subtype);
00671 ff_get_guid(pb, &actual_formattype);
00672 avio_seek(pb, -size, SEEK_CUR);
00673
00674 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
00675 avio_skip(pb, 32);
00676 return st;
00677 } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
00678 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
00679 if (!st)
00680 return NULL;
00681 if (!ff_guidcmp(formattype, format_waveformatex)) {
00682 int ret = ff_get_wav_header(pb, st->codec, size);
00683 if (ret < 0)
00684 return NULL;
00685 } else {
00686 if (ff_guidcmp(formattype, format_none))
00687 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00688 avio_skip(pb, size);
00689 }
00690
00691 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00692 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
00693 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
00694 if (st->codec->extradata && st->codec->extradata_size >= 22)
00695 parse_mpeg1waveformatex(st);
00696 else
00697 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
00698 } else {
00699 st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
00700 if (st->codec->codec_id == CODEC_ID_NONE)
00701 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00702 }
00703 return st;
00704 } else if (!ff_guidcmp(mediatype, mediatype_video)) {
00705 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
00706 if (!st)
00707 return NULL;
00708 if (!ff_guidcmp(formattype, format_videoinfo2)) {
00709 int consumed = parse_videoinfoheader2(s, st);
00710 avio_skip(pb, FFMAX(size - consumed, 0));
00711 } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
00712 int consumed = parse_videoinfoheader2(s, st);
00713 avio_skip(pb, FFMAX(size - consumed, 0));
00714 } else {
00715 if (ff_guidcmp(formattype, format_none))
00716 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00717 avio_skip(pb, size);
00718 }
00719
00720 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
00721 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
00722 } else {
00723 st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
00724 }
00725 if (st->codec->codec_id == CODEC_ID_NONE)
00726 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
00727 return st;
00728 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
00729 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
00730 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00731 if (!st)
00732 return NULL;
00733 if (ff_guidcmp(formattype, format_none))
00734 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00735 avio_skip(pb, size);
00736 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
00737 return st;
00738 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
00739 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
00740 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
00741 if (!st)
00742 return NULL;
00743 if (ff_guidcmp(formattype, format_none))
00744 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00745 avio_skip(pb, size);
00746 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
00747 return st;
00748 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
00749 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
00750 if (ff_guidcmp(formattype, format_none))
00751 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
00752 avio_skip(pb, size);
00753 return NULL;
00754 }
00755
00756 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
00757 ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
00758 ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
00759 avio_skip(pb, size);
00760 return NULL;
00761 }
00762
00763 enum {
00764 SEEK_TO_DATA = 0,
00765 SEEK_TO_PTS,
00766 };
00767
00775 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
00776 {
00777 WtvContext *wtv = s->priv_data;
00778 AVIOContext *pb = wtv->pb;
00779 while (!pb->eof_reached) {
00780 ff_asf_guid g;
00781 int len, sid, consumed;
00782
00783 ff_get_guid(pb, &g);
00784 len = avio_rl32(pb);
00785 if (len < 32)
00786 break;
00787 sid = avio_rl32(pb) & 0x7FFF;
00788 avio_skip(pb, 8);
00789 consumed = 32;
00790
00791 if (!ff_guidcmp(g, stream_guid)) {
00792 if (ff_find_stream_index(s, sid) < 0) {
00793 ff_asf_guid mediatype, subtype, formattype;
00794 int size;
00795 avio_skip(pb, 28);
00796 ff_get_guid(pb, &mediatype);
00797 ff_get_guid(pb, &subtype);
00798 avio_skip(pb, 12);
00799 ff_get_guid(pb, &formattype);
00800 size = avio_rl32(pb);
00801 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
00802 consumed += 92 + size;
00803 }
00804 } else if (!ff_guidcmp(g, stream2_guid)) {
00805 int stream_index = ff_find_stream_index(s, sid);
00806 if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
00807 ff_asf_guid mediatype, subtype, formattype;
00808 int size;
00809 avio_skip(pb, 12);
00810 ff_get_guid(pb, &mediatype);
00811 ff_get_guid(pb, &subtype);
00812 avio_skip(pb, 12);
00813 ff_get_guid(pb, &formattype);
00814 size = avio_rl32(pb);
00815 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
00816 consumed += 76 + size;
00817 }
00818 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
00819 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00820 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
00821 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
00822 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
00823 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
00824 int stream_index = ff_find_stream_index(s, sid);
00825 if (stream_index >= 0) {
00826 AVStream *st = s->streams[stream_index];
00827 uint8_t buf[258];
00828 const uint8_t *pbuf = buf;
00829 int buf_size;
00830
00831 avio_skip(pb, 8);
00832 consumed += 8;
00833 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
00834 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
00835 avio_skip(pb, 6);
00836 consumed += 6;
00837 }
00838
00839 buf_size = FFMIN(len - consumed, sizeof(buf));
00840 avio_read(pb, buf, buf_size);
00841 consumed += buf_size;
00842 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
00843 }
00844 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
00845 int stream_index = ff_find_stream_index(s, sid);
00846 if (stream_index >= 0) {
00847 AVStream *st = s->streams[stream_index];
00848 int audio_type;
00849 avio_skip(pb, 8);
00850 audio_type = avio_r8(pb);
00851 if (audio_type == 2)
00852 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
00853 else if (audio_type == 3)
00854 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00855 consumed += 9;
00856 }
00857 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
00858 int stream_index = ff_find_stream_index(s, sid);
00859 if (stream_index >= 0) {
00860 avio_skip(pb, 12);
00861 if (avio_rl32(pb))
00862 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
00863 consumed += 16;
00864 }
00865 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
00866 int stream_index = ff_find_stream_index(s, sid);
00867 if (stream_index >= 0) {
00868 AVStream *st = s->streams[stream_index];
00869 uint8_t language[4];
00870 avio_skip(pb, 12);
00871 avio_read(pb, language, 3);
00872 if (language[0]) {
00873 language[3] = 0;
00874 av_dict_set(&st->metadata, "language", language, 0);
00875 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
00876 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
00877 }
00878 consumed += 15;
00879 }
00880 } else if (!ff_guidcmp(g, timestamp_guid)) {
00881 int stream_index = ff_find_stream_index(s, sid);
00882 if (stream_index >= 0) {
00883 avio_skip(pb, 8);
00884 wtv->pts = avio_rl64(pb);
00885 consumed += 16;
00886 if (wtv->pts == -1)
00887 wtv->pts = AV_NOPTS_VALUE;
00888 else {
00889 wtv->last_valid_pts = wtv->pts;
00890 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
00891 wtv->epoch = wtv->pts;
00892 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
00893 #define WTV_PAD8(x) (((x) + 7) & ~7)
00894 avio_skip(pb, WTV_PAD8(len) - consumed);
00895 return 0;
00896 }
00897 }
00898 }
00899 } else if (!ff_guidcmp(g, data_guid)) {
00900 int stream_index = ff_find_stream_index(s, sid);
00901 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
00902 WtvStream *wst = s->streams[stream_index]->priv_data;
00903 wst->seen_data = 1;
00904 if (len_ptr) {
00905 *len_ptr = len;
00906 }
00907 return stream_index;
00908 }
00909 } else if (
00910 !ff_guidcmp(g, (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) ||
00911 !ff_guidcmp(g, (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
00912 !ff_guidcmp(g, (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
00913 !ff_guidcmp(g, (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
00914 !ff_guidcmp(g, (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
00915 !ff_guidcmp(g, (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
00916 !ff_guidcmp(g, (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
00917 !ff_guidcmp(g, (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
00918 !ff_guidcmp(g, (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
00919 !ff_guidcmp(g, (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
00920 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
00921 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
00922 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
00923 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00924 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
00925 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00926 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
00927 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
00928
00929 } else
00930 av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
00931
00932 avio_skip(pb, WTV_PAD8(len) - consumed);
00933 }
00934 return AVERROR_EOF;
00935 }
00936
00937
00938 #define _ , 0,
00939 static const uint8_t timeline_le16[] =
00940 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
00941 static const uint8_t table_0_entries_legacy_attrib_le16[] =
00942 {'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};
00943 static const uint8_t table_0_entries_time_le16[] =
00944 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
00945 static const uint8_t timeline_table_0_entries_Events_le16[] =
00946 {'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};
00947 #undef _
00948
00949 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
00950 {
00951 WtvContext *wtv = s->priv_data;
00952 int root_sector, root_size;
00953 uint8_t root[WTV_SECTOR_SIZE];
00954 AVIOContext *pb;
00955 int64_t timeline_pos;
00956 int ret;
00957
00958 wtv->epoch =
00959 wtv->pts =
00960 wtv->last_valid_pts = AV_NOPTS_VALUE;
00961
00962
00963 avio_skip(s->pb, 0x30);
00964 root_size = avio_rl32(s->pb);
00965 if (root_size > sizeof(root)) {
00966 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
00967 return AVERROR_INVALIDDATA;
00968 }
00969 avio_skip(s->pb, 4);
00970 root_sector = avio_rl32(s->pb);
00971
00972 avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
00973 root_size = avio_read(s->pb, root, root_size);
00974 if (root_size < 0)
00975 return AVERROR_INVALIDDATA;
00976
00977
00978 wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
00979 if (!wtv->pb) {
00980 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
00981 return AVERROR_INVALIDDATA;
00982 }
00983
00984 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
00985 if (ret < 0)
00986 return ret;
00987 avio_seek(wtv->pb, -32, SEEK_CUR);
00988
00989 timeline_pos = avio_tell(s->pb);
00990
00991
00992 pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
00993 if (pb) {
00994 parse_legacy_attrib(s, pb);
00995 wtvfile_close(pb);
00996 }
00997
00998
00999 if (s->nb_streams) {
01000 AVStream *st = s->streams[0];
01001 pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
01002 if (pb) {
01003 while(1) {
01004 uint64_t timestamp = avio_rl64(pb);
01005 uint64_t frame_nb = avio_rl64(pb);
01006 if (pb->eof_reached)
01007 break;
01008 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
01009 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
01010 }
01011 wtvfile_close(pb);
01012
01013 if (wtv->nb_index_entries) {
01014 pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
01015 if (pb) {
01016 int i;
01017 while (1) {
01018 uint64_t frame_nb = avio_rl64(pb);
01019 uint64_t position = avio_rl64(pb);
01020 if (pb->eof_reached)
01021 break;
01022 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
01023 AVIndexEntry *e = wtv->index_entries + i;
01024 if (frame_nb > e->size)
01025 break;
01026 if (position > e->pos)
01027 e->pos = position;
01028 }
01029 }
01030 wtvfile_close(pb);
01031 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
01032 }
01033 }
01034 }
01035 }
01036
01037 avio_seek(s->pb, timeline_pos, SEEK_SET);
01038 return 0;
01039 }
01040
01041 static int read_packet(AVFormatContext *s, AVPacket *pkt)
01042 {
01043 WtvContext *wtv = s->priv_data;
01044 AVIOContext *pb = wtv->pb;
01045 int stream_index, len, ret;
01046
01047 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
01048 if (stream_index < 0)
01049 return stream_index;
01050
01051 ret = av_get_packet(pb, pkt, len - 32);
01052 if (ret < 0)
01053 return ret;
01054 pkt->stream_index = stream_index;
01055 pkt->pts = wtv->pts;
01056 avio_skip(pb, WTV_PAD8(len) - len);
01057 return 0;
01058 }
01059
01060 static int read_seek(AVFormatContext *s, int stream_index,
01061 int64_t ts, int flags)
01062 {
01063 WtvContext *wtv = s->priv_data;
01064 AVIOContext *pb = wtv->pb;
01065 AVStream *st = s->streams[0];
01066 int64_t ts_relative;
01067 int i;
01068
01069 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
01070 return AVERROR(ENOSYS);
01071
01072
01073
01074 ts_relative = ts;
01075 if (wtv->epoch != AV_NOPTS_VALUE)
01076 ts_relative -= wtv->epoch;
01077
01078 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
01079 if (i < 0) {
01080 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
01081 avio_seek(pb, 0, SEEK_SET);
01082 else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
01083 avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
01084 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
01085 return AVERROR(ERANGE);
01086 return 0;
01087 }
01088 wtv->pts = wtv->index_entries[i].timestamp;
01089 if (wtv->epoch != AV_NOPTS_VALUE)
01090 wtv->pts += wtv->epoch;
01091 wtv->last_valid_pts = wtv->pts;
01092 avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
01093 return 0;
01094 }
01095
01096 static int read_close(AVFormatContext *s)
01097 {
01098 WtvContext *wtv = s->priv_data;
01099 av_free(wtv->index_entries);
01100 wtvfile_close(wtv->pb);
01101 return 0;
01102 }
01103
01104 AVInputFormat ff_wtv_demuxer = {
01105 .name = "wtv",
01106 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
01107 .priv_data_size = sizeof(WtvContext),
01108 .read_probe = read_probe,
01109 .read_header = read_header,
01110 .read_packet = read_packet,
01111 .read_seek = read_seek,
01112 .read_close = read_close,
01113 .flags = AVFMT_SHOW_IDS,
01114 };