2 * Windows Television (WTV) demuxer
3 * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Windows Television (WTV) demuxer
25 * @author Peter Ross <pross@xvid.org>
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/intfloat_readwrite.h"
36 /* Macros for formating GUIDs */
37 #define PRI_PRETTY_GUID \
38 "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
39 #define ARG_PRETTY_GUID(g) \
40 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]
41 #define LEN_PRETTY_GUID 34
45 * File system routines
50 AVIOContext *pb_filesystem; /** file system (AVFormatContext->pb) */
52 int sector_bits; /** sector shift bits; used to convert sector number into pb_filesystem offset */
53 uint32_t *sectors; /** file allocation table */
54 int nb_sectors; /** number of sectors */
62 * @return bytes read, 0 on end of file, or <0 on error
64 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
67 AVIOContext *pb = wf->pb_filesystem;
70 if (wf->error || pb->error)
72 if (wf->position >= wf->length || url_feof(pb))
75 buf_size = FFMIN(buf_size, wf->length - wf->position);
76 while(nread < buf_size) {
78 int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
79 int read_request = FFMIN(buf_size - nread, remaining_in_sector);
81 n = avio_read(pb, buf, read_request);
87 if (n == remaining_in_sector) {
88 int i = wf->position >> wf->sector_bits;
89 if (i >= wf->nb_sectors ||
90 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
91 avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
101 * @return position (or file length)
103 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
105 WtvFile *wf = opaque;
106 AVIOContext *pb = wf->pb_filesystem;
108 if (whence == AVSEEK_SIZE)
110 else if (whence == SEEK_CUR)
111 offset = wf->position + offset;
112 else if (whence == SEEK_END)
115 wf->error = offset < 0 || offset >= wf->length ||
116 avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
117 + (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0;
118 wf->position = offset;
123 * read non-zero integers (le32) from input stream
125 * @param[out] data destination
126 * @param count maximum number of integers to read
127 * @return total number of integers read
129 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
132 for (i = 0; i < count; i++) {
133 if ((data[total] = avio_rl32(pb)))
141 * @param first_sector First sector
142 * @param length Length of file (bytes)
143 * @param depth File allocation table depth
144 * @return NULL on error
146 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
152 if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
155 wf = av_mallocz(sizeof(WtvFile));
160 wf->sectors = av_malloc(sizeof(uint32_t));
165 wf->sectors[0] = first_sector;
167 } else if (depth == 1) {
168 wf->sectors = av_malloc(WTV_SECTOR_SIZE);
173 wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
174 } else if (depth == 2) {
175 uint32_t sectors1[WTV_SECTOR_SIZE / 4];
176 int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
179 wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS);
185 for (i = 0; i < nb_sectors1; i++) {
186 if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
188 wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
191 av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
195 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
197 if (!wf->nb_sectors) {
198 av_free(wf->sectors);
204 length &= 0xFFFFFFFFFFFF;
205 if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
206 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);
207 length = (int64_t)wf->nb_sectors << wf->sector_bits;
211 /* seek to intial sector */
213 if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) {
214 av_free(wf->sectors);
219 wf->pb_filesystem = s->pb;
220 buffer = av_malloc(1 << wf->sector_bits);
222 av_free(wf->sectors);
227 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
228 wtvfile_read_packet, NULL, wtvfile_seek);
231 av_free(wf->sectors);
238 * Open file using filename
239 * @param[in] buf directory buffer
240 * @param buf_size directory buffer size
241 * @param[in] filename
242 * @param filename_size size of filename
243 * @return NULL on error
245 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
247 const uint8_t *buf_end = buf + buf_size;
249 while(buf + 48 <= buf_end) {
250 int dir_length, name_size, first_sector, depth;
251 uint64_t file_length;
253 if (ff_guidcmp(buf, ff_dir_entry_guid)) {
254 av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
255 "remaining directory entries ignored\n", FF_ARG_GUID(buf));
258 dir_length = AV_RL16(buf + 16);
259 file_length = AV_RL64(buf + 24);
260 name_size = 2 * AV_RL32(buf + 32);
261 if (buf + 48 + name_size > buf_end) {
262 av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
265 first_sector = AV_RL32(buf + 40 + name_size);
266 depth = AV_RL32(buf + 44 + name_size);
268 /* compare file name; test optional null terminator */
270 if (name_size >= filename_size &&
271 !memcmp(name, filename, filename_size) &&
272 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
273 return wtvfile_open_sector(first_sector, file_length, depth, s);
280 #define wtvfile_open(s, buf, buf_size, filename) \
281 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
284 * Close file opened with wtvfile_open_sector(), or wtv_open()
286 static void wtvfile_close(AVIOContext *pb)
288 WtvFile *wf = pb->opaque;
289 av_free(wf->sectors);
304 AVIOContext *pb; /** timeline file */
306 int64_t pts; /** pts for next data chunk */
307 int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
309 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
310 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
311 AVIndexEntry *index_entries;
312 int nb_index_entries;
313 unsigned int index_entries_allocated_size;
317 static const ff_asf_guid metadata_guid =
318 {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
319 static const ff_asf_guid stream2_guid =
320 {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
321 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
322 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
323 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
324 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
325 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
326 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
327 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
328 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
329 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
330 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
331 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
332 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
333 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
334 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
335 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
336 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
337 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
338 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
340 /* Windows media GUIDs */
343 static const ff_asf_guid mediasubtype_mpeg1payload =
344 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
345 static const ff_asf_guid mediatype_mpeg2_sections =
346 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
347 static const ff_asf_guid mediatype_mpeg2_pes =
348 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
349 static const ff_asf_guid mediatype_mstvcaption =
350 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
353 static const ff_asf_guid mediasubtype_cpfilters_processed =
354 {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
355 static const ff_asf_guid mediasubtype_dvb_subtitle =
356 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
357 static const ff_asf_guid mediasubtype_teletext =
358 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
359 static const ff_asf_guid mediasubtype_dtvccdata =
360 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
361 static const ff_asf_guid mediasubtype_mpeg2_sections =
362 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
365 static const ff_asf_guid format_cpfilters_processed =
366 {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
367 static const ff_asf_guid format_waveformatex =
368 {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
369 static const ff_asf_guid format_videoinfo2 =
370 {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
371 static const ff_asf_guid format_mpeg2_video =
372 {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
374 static int read_probe(AVProbeData *p)
376 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
380 * Convert win32 FILETIME to ISO-8601 string
382 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
384 time_t t = (value / 10000000LL) - 11644473600LL;
385 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
389 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
391 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
393 time_t t = (value / 10000000LL) - 719162LL*86400LL;
394 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
398 * Convert OLE DATE to ISO-8601 string
399 * @return <0 on error
401 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
403 time_t t = (av_int2dbl(value) - 25569.0) * 86400;
404 struct tm *result= gmtime(&t);
407 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result);
411 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
414 char description[1024];
415 unsigned int filesize;
417 int64_t pos = avio_tell(pb);
419 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
420 if (strcmp(mime, "image/jpeg"))
424 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
425 filesize = avio_rl32(pb);
429 st = av_new_stream(s, 0);
432 av_dict_set(&st->metadata, "title", description, 0);
433 st->codec->codec_id = CODEC_ID_MJPEG;
434 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
435 st->codec->extradata = av_mallocz(filesize);
436 if (!st->codec->extradata)
438 st->codec->extradata_size = filesize;
439 avio_read(pb, st->codec->extradata, filesize);
441 avio_seek(pb, pos + length, SEEK_SET);
444 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
446 int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
447 char *buf = av_malloc(buf_size);
451 if (type == 0 && length == 4) {
452 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
453 } else if (type == 1) {
454 avio_get_str16le(pb, length, buf, buf_size);
459 } else if (type == 3 && length == 4) {
460 strcpy(buf, avio_rl32(pb) ? "true" : "false");
461 } else if (type == 4 && length == 8) {
462 int64_t num = avio_rl64(pb);
463 if (!strcmp(key, "WM/EncodingTime") ||
464 !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
465 filetime_to_iso8601(buf, buf_size, num);
466 else if (!strcmp(key, "WM/WMRVEncodeTime") ||
467 !strcmp(key, "WM/WMRVEndTime"))
468 crazytime_to_iso8601(buf, buf_size, num);
469 else if (!strcmp(key, "WM/WMRVExpirationDate")) {
470 if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
474 } else if (!strcmp(key, "WM/WMRVBitrate"))
475 snprintf(buf, buf_size, "%f", av_int2dbl(num));
477 snprintf(buf, buf_size, "%"PRIi64, num);
478 } else if (type == 5 && length == 2) {
479 snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
480 } else if (type == 6 && length == 16) {
482 avio_read(pb, guid, 16);
483 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
484 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
485 get_attachment(s, pb, length);
490 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
491 avio_skip(pb, length);
495 av_dict_set(&s->metadata, key, buf, 0);
500 * Parse metadata entries
502 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
506 while(!url_feof(pb)) {
508 ff_get_guid(pb, &guid);
509 type = avio_rl32(pb);
510 length = avio_rl32(pb);
513 if (ff_guidcmp(&guid, metadata_guid)) {
514 av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
515 "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
518 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
519 get_tag(s, pb, key, type, length);
522 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
526 * parse VIDEOINFOHEADER2 structure
527 * @return bytes consumed
529 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
531 WtvContext *wtv = s->priv_data;
532 AVIOContext *pb = wtv->pb;
534 avio_skip(pb, 72); // picture aspect ratio is unreliable
535 ff_get_bmp_header(pb, st);
541 * Parse MPEG1WAVEFORMATEX extradata structure
543 static void parse_mpeg1waveformatex(AVStream *st)
546 switch (AV_RL16(st->codec->extradata)) {
547 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
548 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
549 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
552 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
555 switch (AV_RL16(st->codec->extradata + 6)) {
556 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
557 case 8 : st->codec->channels = 1; break;
563 * @param st Stream to initialise, or NULL to create and initialise new stream
564 * @return NULL on error
566 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
569 if (st->codec->extradata) {
570 av_freep(&st->codec->extradata);
571 st->codec->extradata_size = 0;
574 WtvStream *wst = av_mallocz(sizeof(WtvStream));
577 st = av_new_stream(s, sid);
582 st->codec->codec_type = codec_type;
583 st->need_parsing = AVSTREAM_PARSE_FULL;
584 av_set_pts_info(st, 64, 1, 10000000);
589 * parse Media Type structure and populate stream
590 * @param st Stream, or NULL to create new stream
591 * @param mediatype Mediatype GUID
592 * @param subtype Subtype GUID
593 * @param formattype Format GUID
594 * @param size Size of format buffer
595 * @return NULL on error
597 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
598 ff_asf_guid mediatype, ff_asf_guid subtype,
599 ff_asf_guid formattype, int size)
601 WtvContext *wtv = s->priv_data;
602 AVIOContext *pb = wtv->pb;
603 if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
604 !ff_guidcmp(formattype, format_cpfilters_processed)) {
605 ff_asf_guid actual_subtype;
606 ff_asf_guid actual_formattype;
609 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
614 avio_skip(pb, size - 32);
615 ff_get_guid(pb, &actual_subtype);
616 ff_get_guid(pb, &actual_formattype);
617 avio_seek(pb, -size, SEEK_CUR);
619 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
622 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
623 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
626 if (!ff_guidcmp(formattype, format_waveformatex)) {
627 int ret = ff_get_wav_header(pb, st->codec, size);
631 if (ff_guidcmp(formattype, ff_format_none))
632 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
636 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
637 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
638 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
639 if (st->codec->extradata && st->codec->extradata_size >= 22)
640 parse_mpeg1waveformatex(st);
642 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
644 st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
645 if (st->codec->codec_id == CODEC_ID_NONE)
646 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
649 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
650 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
653 if (!ff_guidcmp(formattype, format_videoinfo2)) {
654 int consumed = parse_videoinfoheader2(s, st);
655 avio_skip(pb, FFMAX(size - consumed, 0));
656 } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
657 int consumed = parse_videoinfoheader2(s, st);
658 avio_skip(pb, FFMAX(size - consumed, 0));
660 if (ff_guidcmp(formattype, ff_format_none))
661 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
665 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
666 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
668 st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
670 if (st->codec->codec_id == CODEC_ID_NONE)
671 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
673 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
674 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
675 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
678 if (ff_guidcmp(formattype, ff_format_none))
679 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
681 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
683 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
684 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
685 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
688 if (ff_guidcmp(formattype, ff_format_none))
689 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
691 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
693 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
694 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
695 if (ff_guidcmp(formattype, ff_format_none))
696 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
701 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
702 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
703 FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
715 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
716 * @param seekts timestamp
717 * @param[out] len_ptr Length of data chunk
718 * @return stream index of data chunk, or <0 on error
720 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
722 WtvContext *wtv = s->priv_data;
723 AVIOContext *pb = wtv->pb;
724 while (!url_feof(pb)) {
726 int len, sid, consumed;
732 sid = avio_rl32(pb) & 0x7FFF;
736 if (!ff_guidcmp(g, ff_stream_guid)) {
737 if (ff_find_stream_index(s, sid) < 0) {
738 ff_asf_guid mediatype, subtype, formattype;
741 ff_get_guid(pb, &mediatype);
742 ff_get_guid(pb, &subtype);
744 ff_get_guid(pb, &formattype);
745 size = avio_rl32(pb);
746 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
747 consumed += 92 + size;
749 } else if (!ff_guidcmp(g, stream2_guid)) {
750 int stream_index = ff_find_stream_index(s, sid);
751 if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
752 ff_asf_guid mediatype, subtype, formattype;
755 ff_get_guid(pb, &mediatype);
756 ff_get_guid(pb, &subtype);
758 ff_get_guid(pb, &formattype);
759 size = avio_rl32(pb);
760 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
761 consumed += 76 + size;
763 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
764 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
765 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
766 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
767 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
768 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
769 int stream_index = ff_find_stream_index(s, sid);
770 if (stream_index >= 0) {
771 AVStream *st = s->streams[stream_index];
773 const uint8_t *pbuf = buf;
778 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
779 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
784 buf_size = FFMIN(len - consumed, sizeof(buf));
785 avio_read(pb, buf, buf_size);
786 consumed += buf_size;
787 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0);
789 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
790 int stream_index = ff_find_stream_index(s, sid);
791 if (stream_index >= 0) {
792 AVStream *st = s->streams[stream_index];
795 audio_type = avio_r8(pb);
797 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
798 else if (audio_type == 3)
799 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
802 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
803 int stream_index = ff_find_stream_index(s, sid);
804 if (stream_index >= 0) {
807 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
810 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
811 int stream_index = ff_find_stream_index(s, sid);
812 if (stream_index >= 0) {
813 AVStream *st = s->streams[stream_index];
816 avio_read(pb, language, 3);
819 av_dict_set(&st->metadata, "language", language, 0);
820 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
821 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
825 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
826 int stream_index = ff_find_stream_index(s, sid);
827 if (stream_index >= 0) {
829 wtv->pts = avio_rl64(pb);
832 wtv->pts = AV_NOPTS_VALUE;
834 wtv->last_valid_pts = wtv->pts;
835 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
836 wtv->epoch = wtv->pts;
837 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
838 #define WTV_PAD8(x) (((x) + 7) & ~7)
839 avio_skip(pb, WTV_PAD8(len) - consumed);
844 } else if (!ff_guidcmp(g, ff_data_guid)) {
845 int stream_index = ff_find_stream_index(s, sid);
846 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
847 WtvStream *wst = s->streams[stream_index]->priv_data;
855 !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) ||
856 !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
857 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
858 !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
859 !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
860 !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
861 !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
862 !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
863 !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
864 !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
865 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
866 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
867 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
868 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
869 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
870 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
871 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
872 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
875 av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
877 avio_skip(pb, WTV_PAD8(len) - consumed);
882 /* declare utf16le strings */
884 static const uint8_t timeline_le16[] =
885 {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
886 static const uint8_t table_0_entries_legacy_attrib_le16[] =
887 {'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};
888 static const uint8_t table_0_entries_time_le16[] =
889 {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
890 static const uint8_t timeline_table_0_entries_Events_le16[] =
891 {'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};
894 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
896 WtvContext *wtv = s->priv_data;
897 int root_sector, root_size;
898 uint8_t root[WTV_SECTOR_SIZE];
900 int64_t timeline_pos;
905 wtv->last_valid_pts = AV_NOPTS_VALUE;
907 /* read root directory sector */
908 avio_skip(s->pb, 0x30);
909 root_size = avio_rl32(s->pb);
910 if (root_size > sizeof(root)) {
911 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
912 return AVERROR_INVALIDDATA;
915 root_sector = avio_rl32(s->pb);
917 avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
918 root_size = avio_read(s->pb, root, root_size);
920 return AVERROR_INVALIDDATA;
922 /* parse chunks up until first data chunk */
923 wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
925 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
926 return AVERROR_INVALIDDATA;
929 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
932 avio_seek(wtv->pb, -32, SEEK_CUR);
934 timeline_pos = avio_tell(s->pb); // save before opening another file
937 pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
939 parse_legacy_attrib(s, pb);
943 /* read seek index */
945 AVStream *st = s->streams[0];
946 pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
949 uint64_t timestamp = avio_rl64(pb);
950 uint64_t frame_nb = avio_rl64(pb);
953 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
954 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
958 if (wtv->nb_index_entries) {
959 pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
963 uint64_t frame_nb = avio_rl64(pb);
964 uint64_t position = avio_rl64(pb);
967 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
968 AVIndexEntry *e = wtv->index_entries + i;
969 if (frame_nb > e->size)
971 if (position > e->pos)
976 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
982 avio_seek(s->pb, timeline_pos, SEEK_SET);
986 static int read_packet(AVFormatContext *s, AVPacket *pkt)
988 WtvContext *wtv = s->priv_data;
989 AVIOContext *pb = wtv->pb;
990 int stream_index, len, ret;
992 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
993 if (stream_index < 0)
996 ret = av_get_packet(pb, pkt, len - 32);
999 pkt->stream_index = stream_index;
1000 pkt->pts = wtv->pts;
1001 avio_skip(pb, WTV_PAD8(len) - len);
1005 static int read_seek(AVFormatContext *s, int stream_index,
1006 int64_t ts, int flags)
1008 WtvContext *wtv = s->priv_data;
1009 AVIOContext *pb = wtv->pb;
1010 AVStream *st = s->streams[0];
1011 int64_t ts_relative;
1014 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1015 return AVERROR(ENOSYS);
1017 /* timestamp adjustment is required because wtv->pts values are absolute,
1018 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1020 if (wtv->epoch != AV_NOPTS_VALUE)
1021 ts_relative -= wtv->epoch;
1023 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1025 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1026 avio_seek(pb, 0, SEEK_SET);
1027 else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1028 avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1029 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1030 return AVERROR(ERANGE);
1033 wtv->pts = wtv->index_entries[i].timestamp;
1034 if (wtv->epoch != AV_NOPTS_VALUE)
1035 wtv->pts += wtv->epoch;
1036 wtv->last_valid_pts = wtv->pts;
1037 avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1041 static int read_close(AVFormatContext *s)
1043 WtvContext *wtv = s->priv_data;
1044 wtvfile_close(wtv->pb);
1048 AVInputFormat ff_wtv_demuxer = {
1050 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1051 .priv_data_size = sizeof(WtvContext),
1052 .read_probe = read_probe,
1053 .read_header = read_header,
1054 .read_packet = read_packet,
1055 .read_seek = read_seek,
1056 .read_close = read_close,
1057 .flags = AVFMT_SHOW_IDS,