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.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 + (int64_t)name_size > buf_end || name_size<0) {
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);
290 av_freep(&pb->opaque);
291 av_freep(&pb->buffer);
306 AVIOContext *pb; /** timeline file */
308 int64_t pts; /** pts for next data chunk */
309 int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
311 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
312 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
313 AVIndexEntry *index_entries;
314 int nb_index_entries;
315 unsigned int index_entries_allocated_size;
319 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
320 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
321 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
322 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
323 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
324 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
325 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
326 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
327 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
328 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
329 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
330 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
331 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
332 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
333 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
334 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
335 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
336 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
338 /* Windows media GUIDs */
341 static const ff_asf_guid mediasubtype_mpeg1payload =
342 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
343 static const ff_asf_guid mediatype_mpeg2_sections =
344 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
345 static const ff_asf_guid mediatype_mpeg2_pes =
346 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
347 static const ff_asf_guid mediatype_mstvcaption =
348 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
351 static const ff_asf_guid mediasubtype_dvb_subtitle =
352 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
353 static const ff_asf_guid mediasubtype_teletext =
354 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
355 static const ff_asf_guid mediasubtype_dtvccdata =
356 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
357 static const ff_asf_guid mediasubtype_mpeg2_sections =
358 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
361 static const ff_asf_guid format_videoinfo2 =
362 {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
364 static int read_probe(AVProbeData *p)
366 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
370 * Convert win32 FILETIME to ISO-8601 string
372 static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
374 time_t t = (value / 10000000LL) - 11644473600LL;
375 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
379 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
381 static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
383 time_t t = (value / 10000000LL) - 719162LL*86400LL;
384 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
388 * Convert OLE DATE to ISO-8601 string
389 * @return <0 on error
391 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
393 time_t t = (av_int2double(value) - 25569.0) * 86400;
394 struct tm *result= gmtime(&t);
397 strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result);
401 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
404 char description[1024];
405 unsigned int filesize;
407 int64_t pos = avio_tell(pb);
409 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
410 if (strcmp(mime, "image/jpeg"))
414 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
415 filesize = avio_rl32(pb);
419 st = avformat_new_stream(s, NULL);
422 av_dict_set(&st->metadata, "title", description, 0);
423 st->codec->codec_id = CODEC_ID_MJPEG;
424 st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
425 st->codec->extradata = av_mallocz(filesize);
426 if (!st->codec->extradata)
428 st->codec->extradata_size = filesize;
429 avio_read(pb, st->codec->extradata, filesize);
431 avio_seek(pb, pos + length, SEEK_SET);
434 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
436 int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
437 char *buf = av_malloc(buf_size);
441 if (type == 0 && length == 4) {
442 snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
443 } else if (type == 1) {
444 avio_get_str16le(pb, length, buf, buf_size);
449 } else if (type == 3 && length == 4) {
450 strcpy(buf, avio_rl32(pb) ? "true" : "false");
451 } else if (type == 4 && length == 8) {
452 int64_t num = avio_rl64(pb);
453 if (!strcmp(key, "WM/EncodingTime") ||
454 !strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
455 filetime_to_iso8601(buf, buf_size, num);
456 else if (!strcmp(key, "WM/WMRVEncodeTime") ||
457 !strcmp(key, "WM/WMRVEndTime"))
458 crazytime_to_iso8601(buf, buf_size, num);
459 else if (!strcmp(key, "WM/WMRVExpirationDate")) {
460 if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
464 } else if (!strcmp(key, "WM/WMRVBitrate"))
465 snprintf(buf, buf_size, "%f", av_int2double(num));
467 snprintf(buf, buf_size, "%"PRIi64, num);
468 } else if (type == 5 && length == 2) {
469 snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
470 } else if (type == 6 && length == 16) {
472 avio_read(pb, guid, 16);
473 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
474 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
475 get_attachment(s, pb, length);
480 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
481 avio_skip(pb, length);
485 av_dict_set(&s->metadata, key, buf, 0);
490 * Parse metadata entries
492 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
496 while(!url_feof(pb)) {
498 ff_get_guid(pb, &guid);
499 type = avio_rl32(pb);
500 length = avio_rl32(pb);
503 if (ff_guidcmp(&guid, ff_metadata_guid)) {
504 av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
505 "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
508 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
509 get_tag(s, pb, key, type, length);
512 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
516 * parse VIDEOINFOHEADER2 structure
517 * @return bytes consumed
519 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
521 WtvContext *wtv = s->priv_data;
522 AVIOContext *pb = wtv->pb;
524 avio_skip(pb, 72); // picture aspect ratio is unreliable
525 ff_get_bmp_header(pb, st, NULL);
531 * Parse MPEG1WAVEFORMATEX extradata structure
533 static void parse_mpeg1waveformatex(AVStream *st)
536 switch (AV_RL16(st->codec->extradata)) {
537 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
538 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
539 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
542 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
545 switch (AV_RL16(st->codec->extradata + 6)) {
546 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
547 case 8 : st->codec->channels = 1; break;
553 * @param st Stream to initialise, or NULL to create and initialise new stream
554 * @return NULL on error
556 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
559 if (st->codec->extradata) {
560 av_freep(&st->codec->extradata);
561 st->codec->extradata_size = 0;
564 WtvStream *wst = av_mallocz(sizeof(WtvStream));
567 st = avformat_new_stream(s, NULL);
573 st->codec->codec_type = codec_type;
574 st->need_parsing = AVSTREAM_PARSE_FULL;
575 avpriv_set_pts_info(st, 64, 1, 10000000);
580 * parse Media Type structure and populate stream
581 * @param st Stream, or NULL to create new stream
582 * @param mediatype Mediatype GUID
583 * @param subtype Subtype GUID
584 * @param formattype Format GUID
585 * @param size Size of format buffer
586 * @return NULL on error
588 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
589 ff_asf_guid mediatype, ff_asf_guid subtype,
590 ff_asf_guid formattype, int size)
592 WtvContext *wtv = s->priv_data;
593 AVIOContext *pb = wtv->pb;
594 if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
595 !ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
596 ff_asf_guid actual_subtype;
597 ff_asf_guid actual_formattype;
600 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
605 avio_skip(pb, size - 32);
606 ff_get_guid(pb, &actual_subtype);
607 ff_get_guid(pb, &actual_formattype);
608 avio_seek(pb, -size, SEEK_CUR);
610 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
613 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
614 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
617 if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
618 int ret = ff_get_wav_header(pb, st->codec, size);
622 if (ff_guidcmp(formattype, ff_format_none))
623 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
627 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
628 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
629 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
630 if (st->codec->extradata && st->codec->extradata_size >= 22)
631 parse_mpeg1waveformatex(st);
633 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
635 st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
636 if (st->codec->codec_id == CODEC_ID_NONE)
637 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
640 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
641 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
644 if (!ff_guidcmp(formattype, format_videoinfo2)) {
645 int consumed = parse_videoinfoheader2(s, st);
646 avio_skip(pb, FFMAX(size - consumed, 0));
647 } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
648 int consumed = parse_videoinfoheader2(s, st);
649 avio_skip(pb, FFMAX(size - consumed, 0));
651 if (ff_guidcmp(formattype, ff_format_none))
652 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
656 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
657 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
659 st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
661 if (st->codec->codec_id == CODEC_ID_NONE)
662 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
664 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
665 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
666 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
669 if (ff_guidcmp(formattype, ff_format_none))
670 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
672 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
674 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
675 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
676 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
679 if (ff_guidcmp(formattype, ff_format_none))
680 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
682 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
684 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
685 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
686 if (ff_guidcmp(formattype, ff_format_none))
687 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
692 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
693 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
694 FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
706 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
707 * @param seekts timestamp
708 * @param[out] len_ptr Length of data chunk
709 * @return stream index of data chunk, or <0 on error
711 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
713 WtvContext *wtv = s->priv_data;
714 AVIOContext *pb = wtv->pb;
715 while (!url_feof(pb)) {
717 int len, sid, consumed;
723 sid = avio_rl32(pb) & 0x7FFF;
727 if (!ff_guidcmp(g, ff_stream_guid)) {
728 if (ff_find_stream_index(s, sid) < 0) {
729 ff_asf_guid mediatype, subtype, formattype;
732 ff_get_guid(pb, &mediatype);
733 ff_get_guid(pb, &subtype);
735 ff_get_guid(pb, &formattype);
736 size = avio_rl32(pb);
737 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
738 consumed += 92 + size;
740 } else if (!ff_guidcmp(g, ff_stream2_guid)) {
741 int stream_index = ff_find_stream_index(s, sid);
742 if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
743 ff_asf_guid mediatype, subtype, formattype;
746 ff_get_guid(pb, &mediatype);
747 ff_get_guid(pb, &subtype);
749 ff_get_guid(pb, &formattype);
750 size = avio_rl32(pb);
751 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
752 consumed += 76 + size;
754 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
755 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
756 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
757 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
758 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
759 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
760 int stream_index = ff_find_stream_index(s, sid);
761 if (stream_index >= 0) {
762 AVStream *st = s->streams[stream_index];
764 const uint8_t *pbuf = buf;
769 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
770 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
775 buf_size = FFMIN(len - consumed, sizeof(buf));
776 avio_read(pb, buf, buf_size);
777 consumed += buf_size;
778 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
780 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
781 int stream_index = ff_find_stream_index(s, sid);
782 if (stream_index >= 0) {
783 AVStream *st = s->streams[stream_index];
786 audio_type = avio_r8(pb);
788 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
789 else if (audio_type == 3)
790 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
793 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
794 int stream_index = ff_find_stream_index(s, sid);
795 if (stream_index >= 0) {
798 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
801 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
802 int stream_index = ff_find_stream_index(s, sid);
803 if (stream_index >= 0) {
804 AVStream *st = s->streams[stream_index];
807 avio_read(pb, language, 3);
810 av_dict_set(&st->metadata, "language", language, 0);
811 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
812 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
816 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
817 int stream_index = ff_find_stream_index(s, sid);
818 if (stream_index >= 0) {
820 wtv->pts = avio_rl64(pb);
823 wtv->pts = AV_NOPTS_VALUE;
825 wtv->last_valid_pts = wtv->pts;
826 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
827 wtv->epoch = wtv->pts;
828 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
829 avio_skip(pb, WTV_PAD8(len) - consumed);
834 } else if (!ff_guidcmp(g, ff_data_guid)) {
835 int stream_index = ff_find_stream_index(s, sid);
836 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
837 WtvStream *wst = s->streams[stream_index]->priv_data;
845 !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}) ||
846 !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}) ||
847 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
848 !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}) ||
849 !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}) ||
850 !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}) ||
851 !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}) ||
852 !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}) ||
853 !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}) ||
854 !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}) ||
855 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
856 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
857 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
858 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
859 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
860 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
861 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
862 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
863 !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
866 av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
868 avio_skip(pb, WTV_PAD8(len) - consumed);
873 static int read_header(AVFormatContext *s)
875 WtvContext *wtv = s->priv_data;
876 int root_sector, root_size;
877 uint8_t root[WTV_SECTOR_SIZE];
879 int64_t timeline_pos;
884 wtv->last_valid_pts = AV_NOPTS_VALUE;
886 /* read root directory sector */
887 avio_skip(s->pb, 0x30);
888 root_size = avio_rl32(s->pb);
889 if (root_size > sizeof(root)) {
890 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
891 return AVERROR_INVALIDDATA;
894 root_sector = avio_rl32(s->pb);
896 avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
897 root_size = avio_read(s->pb, root, root_size);
899 return AVERROR_INVALIDDATA;
901 /* parse chunks up until first data chunk */
902 wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
904 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
905 return AVERROR_INVALIDDATA;
908 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
911 avio_seek(wtv->pb, -32, SEEK_CUR);
913 timeline_pos = avio_tell(s->pb); // save before opening another file
916 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
918 parse_legacy_attrib(s, pb);
922 /* read seek index */
924 AVStream *st = s->streams[0];
925 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
928 uint64_t timestamp = avio_rl64(pb);
929 uint64_t frame_nb = avio_rl64(pb);
932 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
933 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
937 if (wtv->nb_index_entries) {
938 pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
942 uint64_t frame_nb = avio_rl64(pb);
943 uint64_t position = avio_rl64(pb);
946 for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
947 AVIndexEntry *e = wtv->index_entries + i;
948 if (frame_nb > e->size)
950 if (position > e->pos)
955 st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
961 avio_seek(s->pb, timeline_pos, SEEK_SET);
965 static int read_packet(AVFormatContext *s, AVPacket *pkt)
967 WtvContext *wtv = s->priv_data;
968 AVIOContext *pb = wtv->pb;
969 int stream_index, len, ret;
971 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
972 if (stream_index < 0)
975 ret = av_get_packet(pb, pkt, len - 32);
978 pkt->stream_index = stream_index;
980 avio_skip(pb, WTV_PAD8(len) - len);
984 static int read_seek(AVFormatContext *s, int stream_index,
985 int64_t ts, int flags)
987 WtvContext *wtv = s->priv_data;
988 AVIOContext *pb = wtv->pb;
989 AVStream *st = s->streams[0];
993 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
994 return AVERROR(ENOSYS);
996 /* timestamp adjustment is required because wtv->pts values are absolute,
997 * whereas AVIndexEntry->timestamp values are relative to epoch. */
999 if (wtv->epoch != AV_NOPTS_VALUE)
1000 ts_relative -= wtv->epoch;
1002 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1004 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1005 if (avio_seek(pb, 0, SEEK_SET) < 0)
1007 } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1008 if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1011 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1012 return AVERROR(ERANGE);
1015 if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1017 wtv->pts = wtv->index_entries[i].timestamp;
1018 if (wtv->epoch != AV_NOPTS_VALUE)
1019 wtv->pts += wtv->epoch;
1020 wtv->last_valid_pts = wtv->pts;
1024 static int read_close(AVFormatContext *s)
1026 WtvContext *wtv = s->priv_data;
1027 av_freep(&wtv->index_entries);
1028 wtvfile_close(wtv->pb);
1032 AVInputFormat ff_wtv_demuxer = {
1034 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1035 .priv_data_size = sizeof(WtvContext),
1036 .read_probe = read_probe,
1037 .read_header = read_header,
1038 .read_packet = read_packet,
1039 .read_seek = read_seek,
1040 .read_close = read_close,
1041 .flags = AVFMT_SHOW_IDS,