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>
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/intfloat.h"
33 #include "libavutil/time_internal.h"
39 /* Macros for formatting GUIDs */
40 #define PRI_PRETTY_GUID \
41 "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
42 #define ARG_PRETTY_GUID(g) \
43 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]
44 #define LEN_PRETTY_GUID 34
47 * File system routines
50 typedef struct WtvFile {
51 AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */
53 int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
54 uint32_t *sectors; /**< file allocation table */
55 int nb_sectors; /**< number of sectors */
62 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
64 return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
68 * @return bytes read, AVERROR_EOF on end of file, or <0 on error
70 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
73 AVIOContext *pb = wf->pb_filesystem;
76 if (wf->error || pb->error)
78 if (wf->position >= wf->length || avio_feof(pb))
81 buf_size = FFMIN(buf_size, wf->length - wf->position);
82 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)) {
102 return nread ? nread : n;
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(unsigned 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_freep(&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_freep(&wf->sectors);
229 wf->pb_filesystem = s->pb;
230 buffer = av_malloc(1 << wf->sector_bits);
232 av_freep(&wf->sectors);
237 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
238 wtvfile_read_packet, NULL, wtvfile_seek);
241 av_freep(&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 (dir_length == 0) {
277 av_log(s, AV_LOG_ERROR,
278 "bad dir length, remaining directory entries ignored\n");
281 if (48 + (int64_t)name_size > buf_end - buf) {
282 av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
285 first_sector = AV_RL32(buf + 40 + name_size);
286 depth = AV_RL32(buf + 44 + name_size);
288 /* compare file name; test optional null terminator */
290 if (name_size >= filename_size &&
291 !memcmp(name, filename, filename_size) &&
292 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
293 return wtvfile_open_sector(first_sector, file_length, depth, s);
300 #define wtvfile_open(s, buf, buf_size, filename) \
301 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
304 * Close file opened with wtvfile_open_sector(), or wtv_open()
306 static void wtvfile_close(AVIOContext *pb)
308 WtvFile *wf = pb->opaque;
309 av_freep(&wf->sectors);
310 av_freep(&pb->opaque);
311 av_freep(&pb->buffer);
312 avio_context_free(&pb);
319 typedef struct WtvStream {
323 typedef struct WtvContext {
324 AVIOContext *pb; /**< timeline file */
326 int64_t pts; /**< pts for next data chunk */
327 int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
329 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
330 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
331 AVIndexEntry *index_entries;
332 int nb_index_entries;
333 unsigned int index_entries_allocated_size;
337 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
338 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
339 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
340 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
341 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
342 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
343 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
344 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
345 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
346 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
347 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
348 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
349 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
350 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
351 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
352 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
353 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
354 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
356 /* Windows media GUIDs */
359 static const ff_asf_guid mediasubtype_mpeg1payload =
360 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
361 static const ff_asf_guid mediatype_mpeg2_sections =
362 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
363 static const ff_asf_guid mediatype_mpeg2_pes =
364 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
365 static const ff_asf_guid mediatype_mstvcaption =
366 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
369 static const ff_asf_guid mediasubtype_dvb_subtitle =
370 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
371 static const ff_asf_guid mediasubtype_teletext =
372 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
373 static const ff_asf_guid mediasubtype_dtvccdata =
374 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
375 static const ff_asf_guid mediasubtype_mpeg2_sections =
376 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
378 static int read_probe(const AVProbeData *p)
380 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
384 * Convert win32 FILETIME to ISO-8601 string
385 * @return <0 on error
387 static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
389 time_t t = (value / 10000000LL) - 11644473600LL;
391 struct tm *tm = gmtime_r(&t, &tmbuf);
394 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
400 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
401 * @return <0 on error
403 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
405 time_t t = (value / 10000000LL) - 719162LL*86400LL;
407 struct tm *tm = gmtime_r(&t, &tmbuf);
410 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
416 * Convert OLE DATE to ISO-8601 string
417 * @return <0 on error
419 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
421 time_t t = (av_int2double(value) - 25569.0) * 86400;
423 struct tm *tm= gmtime_r(&t, &tmbuf);
426 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
431 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
434 char description[1024];
435 unsigned int filesize;
437 int64_t pos = avio_tell(pb);
439 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
440 if (strcmp(mime, "image/jpeg"))
444 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
445 filesize = avio_rl32(pb);
449 if (ff_add_attached_pic(s, NULL, pb, NULL, filesize) < 0)
451 st = s->streams[s->nb_streams - 1];
452 av_dict_set(&st->metadata, "title", description, 0);
453 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
456 avio_seek(pb, pos + length, SEEK_SET);
459 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
464 if (!strcmp(key, "WM/MediaThumbType")) {
465 avio_skip(pb, length);
469 buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
470 buf = av_malloc(buf_size);
474 if (type == 0 && length == 4) {
475 snprintf(buf, buf_size, "%u", avio_rl32(pb));
476 } else if (type == 1) {
477 avio_get_str16le(pb, length, buf, buf_size);
482 } else if (type == 3 && length == 4) {
483 strcpy(buf, avio_rl32(pb) ? "true" : "false");
484 } else if (type == 4 && length == 8) {
485 int64_t num = avio_rl64(pb);
486 if (!strcmp(key, "WM/EncodingTime") ||
487 !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
488 if (filetime_to_iso8601(buf, buf_size, num) < 0) {
492 } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
493 !strcmp(key, "WM/WMRVEndTime")) {
494 if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
498 } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
499 if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
503 } else if (!strcmp(key, "WM/WMRVBitrate"))
504 snprintf(buf, buf_size, "%f", av_int2double(num));
506 snprintf(buf, buf_size, "%"PRIi64, num);
507 } else if (type == 5 && length == 2) {
508 snprintf(buf, buf_size, "%u", avio_rl16(pb));
509 } else if (type == 6 && length == 16) {
511 avio_read(pb, guid, 16);
512 snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
513 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
514 get_attachment(s, pb, length);
519 av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
520 avio_skip(pb, length);
524 av_dict_set(&s->metadata, key, buf, 0);
529 * Parse metadata entries
531 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
535 while(!avio_feof(pb)) {
537 ff_get_guid(pb, &guid);
538 type = avio_rl32(pb);
539 length = avio_rl32(pb);
542 if (ff_guidcmp(&guid, ff_metadata_guid)) {
543 av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
544 "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
547 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
548 get_tag(s, pb, key, type, length);
551 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
555 * parse VIDEOINFOHEADER2 structure
556 * @return bytes consumed
558 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
560 WtvContext *wtv = s->priv_data;
561 AVIOContext *pb = wtv->pb;
563 avio_skip(pb, 72); // picture aspect ratio is unreliable
564 st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
570 * Parse MPEG1WAVEFORMATEX extradata structure
572 static void parse_mpeg1waveformatex(AVStream *st)
575 switch (AV_RL16(st->codecpar->extradata)) {
576 case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
577 case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
578 case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
581 st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
584 switch (AV_RL16(st->codecpar->extradata + 6)) {
587 case 4 : st->codecpar->channels = 2;
588 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
590 case 8 : st->codecpar->channels = 1;
591 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
598 * @param st Stream to initialise, or NULL to create and initialise new stream
599 * @return NULL on error
601 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
604 if (st->codecpar->extradata) {
605 av_freep(&st->codecpar->extradata);
606 st->codecpar->extradata_size = 0;
609 WtvStream *wst = av_mallocz(sizeof(WtvStream));
612 st = avformat_new_stream(s, NULL);
620 st->codecpar->codec_type = codec_type;
621 st->need_parsing = AVSTREAM_PARSE_FULL;
622 avpriv_set_pts_info(st, 64, 1, 10000000);
627 * parse Media Type structure and populate stream
628 * @param st Stream, or NULL to create new stream
629 * @param mediatype Mediatype GUID
630 * @param subtype Subtype GUID
631 * @param formattype Format GUID
632 * @param size Size of format buffer
633 * @return NULL on error
635 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
636 ff_asf_guid mediatype, ff_asf_guid subtype,
637 ff_asf_guid formattype, uint64_t size)
639 WtvContext *wtv = s->priv_data;
640 AVIOContext *pb = wtv->pb;
641 if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
642 !ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
643 ff_asf_guid actual_subtype;
644 ff_asf_guid actual_formattype;
647 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
652 avio_skip(pb, size - 32);
653 ff_get_guid(pb, &actual_subtype);
654 ff_get_guid(pb, &actual_formattype);
655 avio_seek(pb, -size, SEEK_CUR);
657 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
660 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
661 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
664 if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
665 int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
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));
674 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
675 st->codecpar->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codecpar->bits_per_coded_sample);
676 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
677 if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
678 parse_mpeg1waveformatex(st);
680 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
682 st->codecpar->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
683 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
684 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
687 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
688 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
691 if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
692 int consumed = parse_videoinfoheader2(s, st);
693 avio_skip(pb, FFMAX(size - consumed, 0));
694 } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
695 uint64_t consumed = parse_videoinfoheader2(s, st);
696 /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
697 avio_skip(pb, FFMAX(size - consumed, 0));
699 if (ff_guidcmp(formattype, ff_format_none))
700 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
704 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
705 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
707 st->codecpar->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
709 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
710 av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
712 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
713 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
714 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
717 if (ff_guidcmp(formattype, ff_format_none))
718 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
720 st->codecpar->codec_id = AV_CODEC_ID_DVB_SUBTITLE;
722 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
723 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
724 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
727 if (ff_guidcmp(formattype, ff_format_none))
728 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
730 st->codecpar->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608;
732 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
733 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
734 if (ff_guidcmp(formattype, ff_format_none))
735 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
740 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
741 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
742 FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
753 * Try to seek over a broken chunk
754 * @return <0 on error
756 static int recover(WtvContext *wtv, uint64_t broken_pos)
758 AVIOContext *pb = wtv->pb;
760 for (i = 0; i < wtv->nb_index_entries; i++) {
761 if (wtv->index_entries[i].pos > broken_pos) {
762 int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
765 wtv->pts = wtv->index_entries[i].timestamp;
774 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
775 * @param seekts timestamp
776 * @param[out] len_ptr Length of data chunk
777 * @return stream index of data chunk, or <0 on error
779 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
781 WtvContext *wtv = s->priv_data;
782 AVIOContext *pb = wtv->pb;
783 while (!avio_feof(pb)) {
785 int len, sid, consumed;
789 if (len < 32 || len > INT_MAX - 7) {
793 av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
794 if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
798 sid = avio_rl32(pb) & 0x7FFF;
802 if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) {
803 if (ff_find_stream_index(s, sid) < 0) {
804 ff_asf_guid mediatype, subtype, formattype;
807 ff_get_guid(pb, &mediatype);
808 ff_get_guid(pb, &subtype);
810 ff_get_guid(pb, &formattype);
811 size = avio_rl32(pb);
812 if (size < 0 || size > INT_MAX - 92 - consumed)
813 return AVERROR_INVALIDDATA;
814 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
815 consumed += 92 + size;
817 } else if (!ff_guidcmp(g, ff_stream2_guid)) {
818 int stream_index = ff_find_stream_index(s, sid);
819 if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
820 ff_asf_guid mediatype, subtype, formattype;
823 ff_get_guid(pb, &mediatype);
824 ff_get_guid(pb, &subtype);
826 ff_get_guid(pb, &formattype);
827 size = avio_rl32(pb);
828 if (size < 0 || size > INT_MAX - 76 - consumed)
829 return AVERROR_INVALIDDATA;
830 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
831 consumed += 76 + size;
833 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
834 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
835 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
836 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
837 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
838 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
839 int stream_index = ff_find_stream_index(s, sid);
840 if (stream_index >= 0) {
841 AVStream *st = s->streams[stream_index];
843 const uint8_t *pbuf = buf;
848 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
849 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
854 buf_size = FFMIN(len - consumed, sizeof(buf));
855 avio_read(pb, buf, buf_size);
856 consumed += buf_size;
857 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
859 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
860 int stream_index = ff_find_stream_index(s, sid);
861 if (stream_index >= 0) {
862 AVStream *st = s->streams[stream_index];
865 audio_type = avio_r8(pb);
867 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
868 else if (audio_type == 3)
869 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
872 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
873 int stream_index = ff_find_stream_index(s, sid);
874 if (stream_index >= 0) {
877 av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
880 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
881 int stream_index = ff_find_stream_index(s, sid);
882 if (stream_index >= 0) {
883 AVStream *st = s->streams[stream_index];
886 avio_read(pb, language, 3);
889 av_dict_set(&st->metadata, "language", language, 0);
890 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
891 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
895 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
896 int stream_index = ff_find_stream_index(s, sid);
897 if (stream_index >= 0) {
899 wtv->pts = avio_rl64(pb);
902 wtv->pts = AV_NOPTS_VALUE;
904 wtv->last_valid_pts = wtv->pts;
905 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
906 wtv->epoch = wtv->pts;
907 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
908 avio_skip(pb, WTV_PAD8(len) - consumed);
913 } else if (!ff_guidcmp(g, ff_data_guid)) {
914 int stream_index = ff_find_stream_index(s, sid);
915 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
916 WtvStream *wst = s->streams[stream_index]->priv_data;
923 } 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})) {
924 int stream_index = ff_find_stream_index(s, sid);
925 if (stream_index >= 0)
926 av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
928 !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}) ||
929 !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}) ||
930 !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}) ||
931 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
932 !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}) ||
933 !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}) ||
934 !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}) ||
935 !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}) ||
936 !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}) ||
937 !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}) ||
938 !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}) ||
939 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
940 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
941 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
942 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
943 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
944 !ff_guidcmp(g, ff_index_guid) ||
945 !ff_guidcmp(g, ff_sync_guid) ||
946 !ff_guidcmp(g, ff_stream1_guid) ||
947 !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
950 av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
955 avio_skip(pb, WTV_PAD8(len) - consumed);
960 static int read_header(AVFormatContext *s)
962 WtvContext *wtv = s->priv_data;
963 unsigned root_sector;
965 uint8_t root[WTV_SECTOR_SIZE];
967 int64_t timeline_pos;
972 wtv->last_valid_pts = AV_NOPTS_VALUE;
974 /* read root directory sector */
975 avio_skip(s->pb, 0x30);
976 root_size = avio_rl32(s->pb);
977 if (root_size > sizeof(root)) {
978 av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
979 return AVERROR_INVALIDDATA;
982 root_sector = avio_rl32(s->pb);
984 ret = seek_by_sector(s->pb, root_sector, 0);
987 root_size = avio_read(s->pb, root, root_size);
989 return AVERROR_INVALIDDATA;
991 /* parse chunks up until first data chunk */
992 wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
994 av_log(s, AV_LOG_ERROR, "timeline data missing\n");
995 return AVERROR_INVALIDDATA;
998 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
1000 wtvfile_close(wtv->pb);
1003 avio_seek(wtv->pb, -32, SEEK_CUR);
1005 timeline_pos = avio_tell(s->pb); // save before opening another file
1008 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1010 parse_legacy_attrib(s, pb);
1014 s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1016 /* read seek index */
1017 if (s->nb_streams) {
1018 AVStream *st = s->streams[0];
1019 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1022 uint64_t timestamp = avio_rl64(pb);
1023 uint64_t frame_nb = avio_rl64(pb);
1026 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
1027 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1031 if (wtv->nb_index_entries) {
1032 pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1034 AVIndexEntry *e = wtv->index_entries;
1035 AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1036 uint64_t last_position = 0;
1038 uint64_t frame_nb = avio_rl64(pb);
1039 uint64_t position = avio_rl64(pb);
1040 while (e <= e_end && frame_nb > e->size) {
1041 e->pos = last_position;
1046 last_position = position;
1048 e_end->pos = last_position;
1050 st->duration = e_end->timestamp;
1056 avio_seek(s->pb, timeline_pos, SEEK_SET);
1060 static int read_packet(AVFormatContext *s, AVPacket *pkt)
1062 WtvContext *wtv = s->priv_data;
1063 AVIOContext *pb = wtv->pb;
1064 int stream_index, len, ret;
1066 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1067 if (stream_index < 0)
1068 return stream_index;
1070 ret = av_get_packet(pb, pkt, len - 32);
1073 pkt->stream_index = stream_index;
1074 pkt->pts = wtv->pts;
1075 avio_skip(pb, WTV_PAD8(len) - len);
1079 static int read_seek(AVFormatContext *s, int stream_index,
1080 int64_t ts, int flags)
1082 WtvContext *wtv = s->priv_data;
1083 AVIOContext *pb = wtv->pb;
1084 AVStream *st = s->streams[0];
1085 int64_t ts_relative;
1088 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1089 return AVERROR(ENOSYS);
1091 /* timestamp adjustment is required because wtv->pts values are absolute,
1092 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1094 if (wtv->epoch != AV_NOPTS_VALUE)
1095 ts_relative -= wtv->epoch;
1097 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1099 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1100 if (avio_seek(pb, 0, SEEK_SET) < 0)
1102 } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1103 if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1106 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1107 return AVERROR(ERANGE);
1110 if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1112 wtv->pts = wtv->index_entries[i].timestamp;
1113 if (wtv->epoch != AV_NOPTS_VALUE)
1114 wtv->pts += wtv->epoch;
1115 wtv->last_valid_pts = wtv->pts;
1119 static int read_close(AVFormatContext *s)
1121 WtvContext *wtv = s->priv_data;
1122 av_freep(&wtv->index_entries);
1123 wtvfile_close(wtv->pb);
1127 AVInputFormat ff_wtv_demuxer = {
1129 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1130 .priv_data_size = sizeof(WtvContext),
1131 .read_probe = read_probe,
1132 .read_header = read_header,
1133 .read_packet = read_packet,
1134 .read_seek = read_seek,
1135 .read_close = read_close,
1136 .flags = AVFMT_SHOW_IDS,