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/channel_layout.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/intfloat.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 */
61 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
63 return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
67 * @return bytes read, 0 on end of file, or <0 on error
69 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
72 AVIOContext *pb = wf->pb_filesystem;
75 if (wf->error || pb->error)
77 if (wf->position >= wf->length || url_feof(pb))
80 buf_size = FFMIN(buf_size, wf->length - wf->position);
81 while(nread < buf_size) {
83 int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
84 int read_request = FFMIN(buf_size - nread, remaining_in_sector);
86 n = avio_read(pb, buf, read_request);
92 if (n == remaining_in_sector) {
93 int i = wf->position >> wf->sector_bits;
94 if (i >= wf->nb_sectors ||
95 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
96 seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
106 * @return position (or file length)
108 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
110 WtvFile *wf = opaque;
111 AVIOContext *pb = wf->pb_filesystem;
113 if (whence == AVSEEK_SIZE)
115 else if (whence == SEEK_CUR)
116 offset = wf->position + offset;
117 else if (whence == SEEK_END)
120 wf->error = offset < 0 || offset >= wf->length ||
121 seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
122 offset & ((1 << wf->sector_bits) - 1)) < 0;
123 wf->position = offset;
128 * read non-zero integers (le32) from input stream
130 * @param[out] data destination
131 * @param count maximum number of integers to read
132 * @return total number of integers read
134 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
137 for (i = 0; i < count; i++) {
138 if ((data[total] = avio_rl32(pb)))
146 * @param first_sector First sector
147 * @param length Length of file (bytes)
148 * @param depth File allocation table depth
149 * @return NULL on error
151 static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
158 if (seek_by_sector(s->pb, first_sector, 0) < 0)
161 wf = av_mallocz(sizeof(WtvFile));
166 wf->sectors = av_malloc(sizeof(uint32_t));
171 wf->sectors[0] = first_sector;
173 } else if (depth == 1) {
174 wf->sectors = av_malloc(WTV_SECTOR_SIZE);
179 wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
180 } else if (depth == 2) {
181 uint32_t sectors1[WTV_SECTOR_SIZE / 4];
182 int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
185 wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS);
191 for (i = 0; i < nb_sectors1; i++) {
192 if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
194 wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
197 av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
201 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
203 if (!wf->nb_sectors) {
204 av_free(wf->sectors);
209 size = avio_size(s->pb);
210 if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size)
211 av_log(s, AV_LOG_WARNING, "truncated file\n");
214 length &= 0xFFFFFFFFFFFF;
215 if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
216 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);
217 length = (int64_t)wf->nb_sectors << wf->sector_bits;
221 /* seek to initial sector */
223 if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
224 av_free(wf->sectors);
229 wf->pb_filesystem = s->pb;
230 buffer = av_malloc(1 << wf->sector_bits);
232 av_free(wf->sectors);
237 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
238 wtvfile_read_packet, NULL, wtvfile_seek);
241 av_free(wf->sectors);
248 * Open file using filename
249 * @param[in] buf directory buffer
250 * @param buf_size directory buffer size
251 * @param[in] filename
252 * @param filename_size size of filename
253 * @return NULL on error
255 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
257 const uint8_t *buf_end = buf + buf_size;
259 while(buf + 48 <= buf_end) {
260 int dir_length, name_size, first_sector, depth;
261 uint64_t file_length;
263 if (ff_guidcmp(buf, ff_dir_entry_guid)) {
264 av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
265 "remaining directory entries ignored\n", FF_ARG_GUID(buf));
268 dir_length = AV_RL16(buf + 16);
269 file_length = AV_RL64(buf + 24);
270 name_size = 2 * AV_RL32(buf + 32);
272 av_log(s, AV_LOG_ERROR,
273 "bad filename length, remaining directory entries ignored\n");
276 if (48 + (int64_t)name_size > buf_end - buf) {
277 av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
280 first_sector = AV_RL32(buf + 40 + name_size);
281 depth = AV_RL32(buf + 44 + name_size);
283 /* compare file name; test optional null terminator */
285 if (name_size >= filename_size &&
286 !memcmp(name, filename, filename_size) &&
287 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
288 return wtvfile_open_sector(first_sector, file_length, depth, s);
295 #define wtvfile_open(s, buf, buf_size, filename) \
296 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
299 * Close file opened with wtvfile_open_sector(), or wtv_open()
301 static void wtvfile_close(AVIOContext *pb)
303 WtvFile *wf = pb->opaque;
304 av_free(wf->sectors);
305 av_freep(&pb->opaque);
306 av_freep(&pb->buffer);
321 AVIOContext *pb; /**< timeline file */
323 int64_t pts; /**< pts for next data chunk */
324 int64_t last_valid_pts; /**< latest valid pts, used for interative seeking */
326 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
327 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
328 AVIndexEntry *index_entries;
329 int nb_index_entries;
330 unsigned int index_entries_allocated_size;
334 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
335 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
336 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
337 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
338 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
339 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
340 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
341 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
342 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
343 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
344 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
345 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
346 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
347 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
348 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
349 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
350 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
351 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
353 /* Windows media GUIDs */
356 static const ff_asf_guid mediasubtype_mpeg1payload =
357 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
358 static const ff_asf_guid mediatype_mpeg2_sections =
359 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
360 static const ff_asf_guid mediatype_mpeg2_pes =
361 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
362 static const ff_asf_guid mediatype_mstvcaption =
363 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
366 static const ff_asf_guid mediasubtype_dvb_subtitle =
367 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
368 static const ff_asf_guid mediasubtype_teletext =
369 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
370 static const ff_asf_guid mediasubtype_dtvccdata =
371 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
372 static const ff_asf_guid mediasubtype_mpeg2_sections =
373 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
375 static int read_probe(AVProbeData *p)
377 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
381 * Convert win32 FILETIME to ISO-8601 string
382 * @return <0 on error
384 static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
386 time_t t = (value / 10000000LL) - 11644473600LL;
387 struct tm *tm = gmtime(&t);
390 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
395 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
396 * @return <0 on error
398 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
400 time_t t = (value / 10000000LL) - 719162LL*86400LL;
401 struct tm *tm = gmtime(&t);
404 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
409 * Convert OLE DATE to ISO-8601 string
410 * @return <0 on error
412 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
414 time_t t = (av_int2double(value) - 25569.0) * 86400;
415 struct tm *result= gmtime(&t);
418 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result);
422 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
425 char description[1024];
426 unsigned int filesize;
429 int64_t pos = avio_tell(pb);
431 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
432 if (strcmp(mime, "image/jpeg"))
436 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
437 filesize = avio_rl32(pb);
441 st = avformat_new_stream(s, NULL);
444 av_dict_set(&st->metadata, "title", description, 0);
445 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
446 st->codec->codec_id = AV_CODEC_ID_MJPEG;
448 ret = av_get_packet(pb, &st->attached_pic, filesize);
451 st->attached_pic.stream_index = st->index;
452 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
453 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
455 avio_seek(pb, pos + length, SEEK_SET);
458 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
463 if (!strcmp(key, "WM/MediaThumbType")) {
464 avio_skip(pb, length);
468 buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
469 buf = av_malloc(buf_size);
473 if (type == 0 && length == 4) {
474 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
475 } else if (type == 1) {
476 avio_get_str16le(pb, length, buf, buf_size);
481 } else if (type == 3 && length == 4) {
482 strcpy(buf, avio_rl32(pb) ? "true" : "false");
483 } else if (type == 4 && length == 8) {
484 int64_t num = avio_rl64(pb);
485 if (!strcmp(key, "WM/EncodingTime") ||
486 !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
487 if (filetime_to_iso8601(buf, buf_size, num) < 0) {
491 } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
492 !strcmp(key, "WM/WMRVEndTime")) {
493 if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
497 } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
498 if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
502 } else if (!strcmp(key, "WM/WMRVBitrate"))
503 snprintf(buf, buf_size, "%f", av_int2double(num));
505 snprintf(buf, buf_size, "%"PRIi64, num);
506 } else if (type == 5 && length == 2) {
507 snprintf(buf, buf_size, "%u", avio_rl16(pb));
508 } else if (type == 6 && length == 16) {
510 avio_read(pb, guid, 16);
511 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
512 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
513 get_attachment(s, pb, length);
518 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
519 avio_skip(pb, length);
523 av_dict_set(&s->metadata, key, buf, 0);
528 * Parse metadata entries
530 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
534 while(!url_feof(pb)) {
536 ff_get_guid(pb, &guid);
537 type = avio_rl32(pb);
538 length = avio_rl32(pb);
541 if (ff_guidcmp(&guid, ff_metadata_guid)) {
542 av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
543 "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
546 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
547 get_tag(s, pb, key, type, length);
550 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
554 * parse VIDEOINFOHEADER2 structure
555 * @return bytes consumed
557 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
559 WtvContext *wtv = s->priv_data;
560 AVIOContext *pb = wtv->pb;
562 avio_skip(pb, 72); // picture aspect ratio is unreliable
563 ff_get_bmp_header(pb, st, NULL);
569 * Parse MPEG1WAVEFORMATEX extradata structure
571 static void parse_mpeg1waveformatex(AVStream *st)
574 switch (AV_RL16(st->codec->extradata)) {
575 case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break;
576 case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break;
577 case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break;
580 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
583 switch (AV_RL16(st->codec->extradata + 6)) {
586 case 4 : st->codec->channels = 2;
587 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
589 case 8 : st->codec->channels = 1;
590 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
597 * @param st Stream to initialise, or NULL to create and initialise new stream
598 * @return NULL on error
600 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
603 if (st->codec->extradata) {
604 av_freep(&st->codec->extradata);
605 st->codec->extradata_size = 0;
608 WtvStream *wst = av_mallocz(sizeof(WtvStream));
611 st = avformat_new_stream(s, NULL);
619 st->codec->codec_type = codec_type;
620 st->need_parsing = AVSTREAM_PARSE_FULL;
621 avpriv_set_pts_info(st, 64, 1, 10000000);
626 * parse Media Type structure and populate stream
627 * @param st Stream, or NULL to create new stream
628 * @param mediatype Mediatype GUID
629 * @param subtype Subtype GUID
630 * @param formattype Format GUID
631 * @param size Size of format buffer
632 * @return NULL on error
634 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
635 ff_asf_guid mediatype, ff_asf_guid subtype,
636 ff_asf_guid formattype, int size)
638 WtvContext *wtv = s->priv_data;
639 AVIOContext *pb = wtv->pb;
640 if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
641 !ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
642 ff_asf_guid actual_subtype;
643 ff_asf_guid actual_formattype;
646 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
651 avio_skip(pb, size - 32);
652 ff_get_guid(pb, &actual_subtype);
653 ff_get_guid(pb, &actual_formattype);
654 avio_seek(pb, -size, SEEK_CUR);
656 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
659 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
660 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
663 if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
664 int ret = ff_get_wav_header(pb, st->codec, size);
668 if (ff_guidcmp(formattype, ff_format_none))
669 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
673 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
674 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
675 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
676 if (st->codec->extradata && st->codec->extradata_size >= 22)
677 parse_mpeg1waveformatex(st);
679 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
681 st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
682 if (st->codec->codec_id == AV_CODEC_ID_NONE)
683 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
686 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
687 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
690 if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
691 int consumed = parse_videoinfoheader2(s, st);
692 avio_skip(pb, FFMAX(size - consumed, 0));
693 } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
694 int consumed = parse_videoinfoheader2(s, st);
695 avio_skip(pb, FFMAX(size - consumed, 0));
697 if (ff_guidcmp(formattype, ff_format_none))
698 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
702 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
703 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
705 st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
707 if (st->codec->codec_id == AV_CODEC_ID_NONE)
708 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
710 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
711 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
712 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
715 if (ff_guidcmp(formattype, ff_format_none))
716 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
718 st->codec->codec_id = AV_CODEC_ID_DVB_SUBTITLE;
720 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
721 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
722 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
725 if (ff_guidcmp(formattype, ff_format_none))
726 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
728 st->codec->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608;
730 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
731 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
732 if (ff_guidcmp(formattype, ff_format_none))
733 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
738 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
739 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
740 FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
752 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
753 * @param seekts timestamp
754 * @param[out] len_ptr Length of data chunk
755 * @return stream index of data chunk, or <0 on error
757 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
759 WtvContext *wtv = s->priv_data;
760 AVIOContext *pb = wtv->pb;
761 while (!url_feof(pb)) {
763 int len, sid, consumed;
769 sid = avio_rl32(pb) & 0x7FFF;
773 if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) {
774 if (ff_find_stream_index(s, sid) < 0) {
775 ff_asf_guid mediatype, subtype, formattype;
778 ff_get_guid(pb, &mediatype);
779 ff_get_guid(pb, &subtype);
781 ff_get_guid(pb, &formattype);
782 size = avio_rl32(pb);
783 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
784 consumed += 92 + size;
786 } else if (!ff_guidcmp(g, ff_stream2_guid)) {
787 int stream_index = ff_find_stream_index(s, sid);
788 if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
789 ff_asf_guid mediatype, subtype, formattype;
792 ff_get_guid(pb, &mediatype);
793 ff_get_guid(pb, &subtype);
795 ff_get_guid(pb, &formattype);
796 size = avio_rl32(pb);
797 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
798 consumed += 76 + size;
800 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
801 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
802 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
803 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
804 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
805 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
806 int stream_index = ff_find_stream_index(s, sid);
807 if (stream_index >= 0) {
808 AVStream *st = s->streams[stream_index];
810 const uint8_t *pbuf = buf;
815 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
816 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
821 buf_size = FFMIN(len - consumed, sizeof(buf));
822 avio_read(pb, buf, buf_size);
823 consumed += buf_size;
824 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
826 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
827 int stream_index = ff_find_stream_index(s, sid);
828 if (stream_index >= 0) {
829 AVStream *st = s->streams[stream_index];
832 audio_type = avio_r8(pb);
834 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
835 else if (audio_type == 3)
836 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
839 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
840 int stream_index = ff_find_stream_index(s, sid);
841 if (stream_index >= 0) {
844 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
847 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
848 int stream_index = ff_find_stream_index(s, sid);
849 if (stream_index >= 0) {
850 AVStream *st = s->streams[stream_index];
853 avio_read(pb, language, 3);
856 av_dict_set(&st->metadata, "language", language, 0);
857 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
858 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
862 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
863 int stream_index = ff_find_stream_index(s, sid);
864 if (stream_index >= 0) {
866 wtv->pts = avio_rl64(pb);
869 wtv->pts = AV_NOPTS_VALUE;
871 wtv->last_valid_pts = wtv->pts;
872 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
873 wtv->epoch = wtv->pts;
874 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
875 avio_skip(pb, WTV_PAD8(len) - consumed);
880 } else if (!ff_guidcmp(g, ff_data_guid)) {
881 int stream_index = ff_find_stream_index(s, sid);
882 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
883 WtvStream *wst = s->streams[stream_index]->priv_data;
890 } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) {
891 int stream_index = ff_find_stream_index(s, sid);
892 if (stream_index >= 0)
893 av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
895 !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}) ||
896 !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) ||
897 !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}) ||
898 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
899 !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}) ||
900 !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}) ||
901 !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}) ||
902 !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}) ||
903 !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}) ||
904 !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}) ||
905 !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}) ||
906 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
907 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
908 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
909 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
910 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
911 !ff_guidcmp(g, ff_index_guid) ||
912 !ff_guidcmp(g, ff_sync_guid) ||
913 !ff_guidcmp(g, ff_stream1_guid) ||
914 !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
917 av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
919 avio_skip(pb, WTV_PAD8(len) - consumed);
924 static int read_header(AVFormatContext *s)
926 WtvContext *wtv = s->priv_data;
927 int root_sector, root_size;
928 uint8_t root[WTV_SECTOR_SIZE];
930 int64_t timeline_pos;
935 wtv->last_valid_pts = AV_NOPTS_VALUE;
937 /* read root directory sector */
938 avio_skip(s->pb, 0x30);
939 root_size = avio_rl32(s->pb);
940 if (root_size > sizeof(root)) {
941 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
942 return AVERROR_INVALIDDATA;
945 root_sector = avio_rl32(s->pb);
947 seek_by_sector(s->pb, root_sector, 0);
948 root_size = avio_read(s->pb, root, root_size);
950 return AVERROR_INVALIDDATA;
952 /* parse chunks up until first data chunk */
953 wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
955 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
956 return AVERROR_INVALIDDATA;
959 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
962 avio_seek(wtv->pb, -32, SEEK_CUR);
964 timeline_pos = avio_tell(s->pb); // save before opening another file
967 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
969 parse_legacy_attrib(s, pb);
973 /* read seek index */
975 AVStream *st = s->streams[0];
976 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
979 uint64_t timestamp = avio_rl64(pb);
980 uint64_t frame_nb = avio_rl64(pb);
983 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
984 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
988 if (wtv->nb_index_entries) {
989 pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
993 uint64_t frame_nb = avio_rl64(pb);
994 uint64_t position = avio_rl64(pb);
997 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
998 AVIndexEntry *e = wtv->index_entries + i;
999 if (frame_nb > e->size)
1001 if (position > e->pos)
1006 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1012 avio_seek(s->pb, timeline_pos, SEEK_SET);
1016 static int read_packet(AVFormatContext *s, AVPacket *pkt)
1018 WtvContext *wtv = s->priv_data;
1019 AVIOContext *pb = wtv->pb;
1020 int stream_index, len, ret;
1022 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1023 if (stream_index < 0)
1024 return stream_index;
1026 ret = av_get_packet(pb, pkt, len - 32);
1029 pkt->stream_index = stream_index;
1030 pkt->pts = wtv->pts;
1031 avio_skip(pb, WTV_PAD8(len) - len);
1035 static int read_seek(AVFormatContext *s, int stream_index,
1036 int64_t ts, int flags)
1038 WtvContext *wtv = s->priv_data;
1039 AVIOContext *pb = wtv->pb;
1040 AVStream *st = s->streams[0];
1041 int64_t ts_relative;
1044 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1045 return AVERROR(ENOSYS);
1047 /* timestamp adjustment is required because wtv->pts values are absolute,
1048 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1050 if (wtv->epoch != AV_NOPTS_VALUE)
1051 ts_relative -= wtv->epoch;
1053 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1055 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1056 if (avio_seek(pb, 0, SEEK_SET) < 0)
1058 } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1059 if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1062 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1063 return AVERROR(ERANGE);
1066 if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1068 wtv->pts = wtv->index_entries[i].timestamp;
1069 if (wtv->epoch != AV_NOPTS_VALUE)
1070 wtv->pts += wtv->epoch;
1071 wtv->last_valid_pts = wtv->pts;
1075 static int read_close(AVFormatContext *s)
1077 WtvContext *wtv = s->priv_data;
1078 av_freep(&wtv->index_entries);
1079 wtvfile_close(wtv->pb);
1083 AVInputFormat ff_wtv_demuxer = {
1085 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1086 .priv_data_size = sizeof(WtvContext),
1087 .read_probe = read_probe,
1088 .read_header = read_header,
1089 .read_packet = read_packet,
1090 .read_seek = read_seek,
1091 .read_close = read_close,
1092 .flags = AVFMT_SHOW_IDS,