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 formating 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
48 * File system routines
53 AVIOContext
*pb_filesystem
; /**< file system (AVFormatContext->pb) */
55 int sector_bits
; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
56 uint32_t *sectors
; /**< file allocation table */
57 int nb_sectors
; /**< number of sectors */
64 static int64_t seek_by_sector(AVIOContext
*pb
, int64_t sector
, int64_t offset
)
66 return avio_seek(pb
, (sector
<< WTV_SECTOR_BITS
) + offset
, SEEK_SET
);
70 * @return bytes read, 0 on end of file, or <0 on error
72 static int wtvfile_read_packet(void *opaque
, uint8_t *buf
, int buf_size
)
75 AVIOContext
*pb
= wf
->pb_filesystem
;
78 if (wf
->error
|| pb
->error
)
80 if (wf
->position
>= wf
->length
|| avio_feof(pb
))
83 buf_size
= FFMIN(buf_size
, wf
->length
- wf
->position
);
84 while(nread
< buf_size
) {
86 int remaining_in_sector
= (1 << wf
->sector_bits
) - (wf
->position
& ((1 << wf
->sector_bits
) - 1));
87 int read_request
= FFMIN(buf_size
- nread
, remaining_in_sector
);
89 n
= avio_read(pb
, buf
, read_request
);
95 if (n
== remaining_in_sector
) {
96 int i
= wf
->position
>> wf
->sector_bits
;
97 if (i
>= wf
->nb_sectors
||
98 (wf
->sectors
[i
] != wf
->sectors
[i
- 1] + (1 << (wf
->sector_bits
- WTV_SECTOR_BITS
)) &&
99 seek_by_sector(pb
, wf
->sectors
[i
], 0) < 0)) {
109 * @return position (or file length)
111 static int64_t wtvfile_seek(void *opaque
, int64_t offset
, int whence
)
113 WtvFile
*wf
= opaque
;
114 AVIOContext
*pb
= wf
->pb_filesystem
;
116 if (whence
== AVSEEK_SIZE
)
118 else if (whence
== SEEK_CUR
)
119 offset
= wf
->position
+ offset
;
120 else if (whence
== SEEK_END
)
123 wf
->error
= offset
< 0 || offset
>= wf
->length
||
124 seek_by_sector(pb
, wf
->sectors
[offset
>> wf
->sector_bits
],
125 offset
& ((1 << wf
->sector_bits
) - 1)) < 0;
126 wf
->position
= offset
;
131 * read non-zero integers (le32) from input stream
133 * @param[out] data destination
134 * @param count maximum number of integers to read
135 * @return total number of integers read
137 static int read_ints(AVIOContext
*pb
, uint32_t *data
, int count
)
140 for (i
= 0; i
< count
; i
++) {
141 if ((data
[total
] = avio_rl32(pb
)))
149 * @param first_sector First sector
150 * @param length Length of file (bytes)
151 * @param depth File allocation table depth
152 * @return NULL on error
154 static AVIOContext
* wtvfile_open_sector(int first_sector
, uint64_t length
, int depth
, AVFormatContext
*s
)
161 if (seek_by_sector(s
->pb
, first_sector
, 0) < 0)
164 wf
= av_mallocz(sizeof(WtvFile
));
169 wf
->sectors
= av_malloc(sizeof(uint32_t));
174 wf
->sectors
[0] = first_sector
;
176 } else if (depth
== 1) {
177 wf
->sectors
= av_malloc(WTV_SECTOR_SIZE
);
182 wf
->nb_sectors
= read_ints(s
->pb
, wf
->sectors
, WTV_SECTOR_SIZE
/ 4);
183 } else if (depth
== 2) {
184 uint32_t sectors1
[WTV_SECTOR_SIZE
/ 4];
185 int nb_sectors1
= read_ints(s
->pb
, sectors1
, WTV_SECTOR_SIZE
/ 4);
188 wf
->sectors
= av_malloc_array(nb_sectors1
, 1 << WTV_SECTOR_BITS
);
194 for (i
= 0; i
< nb_sectors1
; i
++) {
195 if (seek_by_sector(s
->pb
, sectors1
[i
], 0) < 0)
197 wf
->nb_sectors
+= read_ints(s
->pb
, wf
->sectors
+ i
* WTV_SECTOR_SIZE
/ 4, WTV_SECTOR_SIZE
/ 4);
200 av_log(s
, AV_LOG_ERROR
, "unsupported file allocation table depth (0x%x)\n", depth
);
204 wf
->sector_bits
= length
& (1ULL<<63) ? WTV_SECTOR_BITS
: WTV_BIGSECTOR_BITS
;
206 if (!wf
->nb_sectors
) {
207 av_free(wf
->sectors
);
212 size
= avio_size(s
->pb
);
213 if (size
>= 0 && (int64_t)wf
->sectors
[wf
->nb_sectors
- 1] << WTV_SECTOR_BITS
> size
)
214 av_log(s
, AV_LOG_WARNING
, "truncated file\n");
217 length
&= 0xFFFFFFFFFFFF;
218 if (length
> ((int64_t)wf
->nb_sectors
<< wf
->sector_bits
)) {
219 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
);
220 length
= (int64_t)wf
->nb_sectors
<< wf
->sector_bits
;
224 /* seek to initial sector */
226 if (seek_by_sector(s
->pb
, wf
->sectors
[0], 0) < 0) {
227 av_free(wf
->sectors
);
232 wf
->pb_filesystem
= s
->pb
;
233 buffer
= av_malloc(1 << wf
->sector_bits
);
235 av_free(wf
->sectors
);
240 pb
= avio_alloc_context(buffer
, 1 << wf
->sector_bits
, 0, wf
,
241 wtvfile_read_packet
, NULL
, wtvfile_seek
);
244 av_free(wf
->sectors
);
251 * Open file using filename
252 * @param[in] buf directory buffer
253 * @param buf_size directory buffer size
254 * @param[in] filename
255 * @param filename_size size of filename
256 * @return NULL on error
258 static AVIOContext
* wtvfile_open2(AVFormatContext
*s
, const uint8_t *buf
, int buf_size
, const uint8_t *filename
, int filename_size
)
260 const uint8_t *buf_end
= buf
+ buf_size
;
262 while(buf
+ 48 <= buf_end
) {
263 int dir_length
, name_size
, first_sector
, depth
;
264 uint64_t file_length
;
266 if (ff_guidcmp(buf
, ff_dir_entry_guid
)) {
267 av_log(s
, AV_LOG_ERROR
, "unknown guid "FF_PRI_GUID
", expected dir_entry_guid; "
268 "remaining directory entries ignored\n", FF_ARG_GUID(buf
));
271 dir_length
= AV_RL16(buf
+ 16);
272 file_length
= AV_RL64(buf
+ 24);
273 name_size
= 2 * AV_RL32(buf
+ 32);
275 av_log(s
, AV_LOG_ERROR
,
276 "bad filename length, remaining directory entries ignored\n");
279 if (48 + (int64_t)name_size
> buf_end
- buf
) {
280 av_log(s
, AV_LOG_ERROR
, "filename exceeds buffer size; remaining directory entries ignored\n");
283 first_sector
= AV_RL32(buf
+ 40 + name_size
);
284 depth
= AV_RL32(buf
+ 44 + name_size
);
286 /* compare file name; test optional null terminator */
288 if (name_size
>= filename_size
&&
289 !memcmp(name
, filename
, filename_size
) &&
290 (name_size
< filename_size
+ 2 || !AV_RN16(name
+ filename_size
)))
291 return wtvfile_open_sector(first_sector
, file_length
, depth
, s
);
298 #define wtvfile_open(s, buf, buf_size, filename) \
299 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
302 * Close file opened with wtvfile_open_sector(), or wtv_open()
304 static void wtvfile_close(AVIOContext
*pb
)
306 WtvFile
*wf
= pb
->opaque
;
307 av_free(wf
->sectors
);
308 av_freep(&pb
->opaque
);
309 av_freep(&pb
->buffer
);
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 interative 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(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
;
438 int64_t pos
= avio_tell(pb
);
440 avio_get_str16le(pb
, INT_MAX
, mime
, sizeof(mime
));
441 if (strcmp(mime
, "image/jpeg"))
445 avio_get_str16le(pb
, INT_MAX
, description
, sizeof(description
));
446 filesize
= avio_rl32(pb
);
450 st
= avformat_new_stream(s
, NULL
);
453 av_dict_set(&st
->metadata
, "title", description
, 0);
454 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
455 st
->codec
->codec_id
= AV_CODEC_ID_MJPEG
;
457 ret
= av_get_packet(pb
, &st
->attached_pic
, filesize
);
460 st
->attached_pic
.stream_index
= st
->index
;
461 st
->attached_pic
.flags
|= AV_PKT_FLAG_KEY
;
462 st
->disposition
|= AV_DISPOSITION_ATTACHED_PIC
;
464 avio_seek(pb
, pos
+ length
, SEEK_SET
);
467 static void get_tag(AVFormatContext
*s
, AVIOContext
*pb
, const char *key
, int type
, int length
)
472 if (!strcmp(key
, "WM/MediaThumbType")) {
473 avio_skip(pb
, length
);
477 buf_size
= FFMAX(2*length
, LEN_PRETTY_GUID
) + 1;
478 buf
= av_malloc(buf_size
);
482 if (type
== 0 && length
== 4) {
483 snprintf(buf
, buf_size
, "%u", avio_rl32(pb
));
484 } else if (type
== 1) {
485 avio_get_str16le(pb
, length
, buf
, buf_size
);
490 } else if (type
== 3 && length
== 4) {
491 strcpy(buf
, avio_rl32(pb
) ? "true" : "false");
492 } else if (type
== 4 && length
== 8) {
493 int64_t num
= avio_rl64(pb
);
494 if (!strcmp(key
, "WM/EncodingTime") ||
495 !strcmp(key
, "WM/MediaOriginalBroadcastDateTime")) {
496 if (filetime_to_iso8601(buf
, buf_size
, num
) < 0) {
500 } else if (!strcmp(key
, "WM/WMRVEncodeTime") ||
501 !strcmp(key
, "WM/WMRVEndTime")) {
502 if (crazytime_to_iso8601(buf
, buf_size
, num
) < 0) {
506 } else if (!strcmp(key
, "WM/WMRVExpirationDate")) {
507 if (oledate_to_iso8601(buf
, buf_size
, num
) < 0 ) {
511 } else if (!strcmp(key
, "WM/WMRVBitrate"))
512 snprintf(buf
, buf_size
, "%f", av_int2double(num
));
514 snprintf(buf
, buf_size
, "%"PRIi64
, num
);
515 } else if (type
== 5 && length
== 2) {
516 snprintf(buf
, buf_size
, "%u", avio_rl16(pb
));
517 } else if (type
== 6 && length
== 16) {
519 avio_read(pb
, guid
, 16);
520 snprintf(buf
, buf_size
, PRI_PRETTY_GUID
, ARG_PRETTY_GUID(guid
));
521 } else if (type
== 2 && !strcmp(key
, "WM/Picture")) {
522 get_attachment(s
, pb
, length
);
527 av_log(s
, AV_LOG_WARNING
, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key
, type
, length
);
528 avio_skip(pb
, length
);
532 av_dict_set(&s
->metadata
, key
, buf
, 0);
537 * Parse metadata entries
539 static void parse_legacy_attrib(AVFormatContext
*s
, AVIOContext
*pb
)
543 while(!avio_feof(pb
)) {
545 ff_get_guid(pb
, &guid
);
546 type
= avio_rl32(pb
);
547 length
= avio_rl32(pb
);
550 if (ff_guidcmp(&guid
, ff_metadata_guid
)) {
551 av_log(s
, AV_LOG_WARNING
, "unknown guid "FF_PRI_GUID
", expected metadata_guid; "
552 "remaining metadata entries ignored\n", FF_ARG_GUID(guid
));
555 avio_get_str16le(pb
, INT_MAX
, key
, sizeof(key
));
556 get_tag(s
, pb
, key
, type
, length
);
559 ff_metadata_conv(&s
->metadata
, NULL
, ff_asf_metadata_conv
);
563 * parse VIDEOINFOHEADER2 structure
564 * @return bytes consumed
566 static int parse_videoinfoheader2(AVFormatContext
*s
, AVStream
*st
)
568 WtvContext
*wtv
= s
->priv_data
;
569 AVIOContext
*pb
= wtv
->pb
;
571 avio_skip(pb
, 72); // picture aspect ratio is unreliable
572 st
->codec
->codec_tag
= ff_get_bmp_header(pb
, st
, NULL
);
578 * Parse MPEG1WAVEFORMATEX extradata structure
580 static void parse_mpeg1waveformatex(AVStream
*st
)
583 switch (AV_RL16(st
->codec
->extradata
)) {
584 case 0x0001 : st
->codec
->codec_id
= AV_CODEC_ID_MP1
; break;
585 case 0x0002 : st
->codec
->codec_id
= AV_CODEC_ID_MP2
; break;
586 case 0x0004 : st
->codec
->codec_id
= AV_CODEC_ID_MP3
; break;
589 st
->codec
->bit_rate
= AV_RL32(st
->codec
->extradata
+ 2); /* dwHeadBitrate */
592 switch (AV_RL16(st
->codec
->extradata
+ 6)) {
595 case 4 : st
->codec
->channels
= 2;
596 st
->codec
->channel_layout
= AV_CH_LAYOUT_STEREO
;
598 case 8 : st
->codec
->channels
= 1;
599 st
->codec
->channel_layout
= AV_CH_LAYOUT_MONO
;
606 * @param st Stream to initialise, or NULL to create and initialise new stream
607 * @return NULL on error
609 static AVStream
* new_stream(AVFormatContext
*s
, AVStream
*st
, int sid
, int codec_type
)
612 if (st
->codec
->extradata
) {
613 av_freep(&st
->codec
->extradata
);
614 st
->codec
->extradata_size
= 0;
617 WtvStream
*wst
= av_mallocz(sizeof(WtvStream
));
620 st
= avformat_new_stream(s
, NULL
);
628 st
->codec
->codec_type
= codec_type
;
629 st
->need_parsing
= AVSTREAM_PARSE_FULL
;
630 avpriv_set_pts_info(st
, 64, 1, 10000000);
635 * parse Media Type structure and populate stream
636 * @param st Stream, or NULL to create new stream
637 * @param mediatype Mediatype GUID
638 * @param subtype Subtype GUID
639 * @param formattype Format GUID
640 * @param size Size of format buffer
641 * @return NULL on error
643 static AVStream
* parse_media_type(AVFormatContext
*s
, AVStream
*st
, int sid
,
644 ff_asf_guid mediatype
, ff_asf_guid subtype
,
645 ff_asf_guid formattype
, uint64_t size
)
647 WtvContext
*wtv
= s
->priv_data
;
648 AVIOContext
*pb
= wtv
->pb
;
649 if (!ff_guidcmp(subtype
, ff_mediasubtype_cpfilters_processed
) &&
650 !ff_guidcmp(formattype
, ff_format_cpfilters_processed
)) {
651 ff_asf_guid actual_subtype
;
652 ff_asf_guid actual_formattype
;
655 av_log(s
, AV_LOG_WARNING
, "format buffer size underflow\n");
660 avio_skip(pb
, size
- 32);
661 ff_get_guid(pb
, &actual_subtype
);
662 ff_get_guid(pb
, &actual_formattype
);
663 avio_seek(pb
, -size
, SEEK_CUR
);
665 st
= parse_media_type(s
, st
, sid
, mediatype
, actual_subtype
, actual_formattype
, size
- 32);
668 } else if (!ff_guidcmp(mediatype
, ff_mediatype_audio
)) {
669 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_AUDIO
);
672 if (!ff_guidcmp(formattype
, ff_format_waveformatex
)) {
673 int ret
= ff_get_wav_header(pb
, st
->codec
, size
);
677 if (ff_guidcmp(formattype
, ff_format_none
))
678 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
682 if (!memcmp(subtype
+ 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID
}, 12)) {
683 st
->codec
->codec_id
= ff_wav_codec_get_id(AV_RL32(subtype
), st
->codec
->bits_per_coded_sample
);
684 } else if (!ff_guidcmp(subtype
, mediasubtype_mpeg1payload
)) {
685 if (st
->codec
->extradata
&& st
->codec
->extradata_size
>= 22)
686 parse_mpeg1waveformatex(st
);
688 av_log(s
, AV_LOG_WARNING
, "MPEG1WAVEFORMATEX underflow\n");
690 st
->codec
->codec_id
= ff_codec_guid_get_id(ff_codec_wav_guids
, subtype
);
691 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
)
692 av_log(s
, AV_LOG_WARNING
, "unknown subtype:"FF_PRI_GUID
"\n", FF_ARG_GUID(subtype
));
695 } else if (!ff_guidcmp(mediatype
, ff_mediatype_video
)) {
696 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_VIDEO
);
699 if (!ff_guidcmp(formattype
, ff_format_videoinfo2
)) {
700 int consumed
= parse_videoinfoheader2(s
, st
);
701 avio_skip(pb
, FFMAX(size
- consumed
, 0));
702 } else if (!ff_guidcmp(formattype
, ff_format_mpeg2_video
)) {
703 uint64_t consumed
= parse_videoinfoheader2(s
, st
);
704 /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
705 avio_skip(pb
, FFMAX(size
- consumed
, 0));
707 if (ff_guidcmp(formattype
, ff_format_none
))
708 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
712 if (!memcmp(subtype
+ 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID
}, 12)) {
713 st
->codec
->codec_id
= ff_codec_get_id(ff_codec_bmp_tags
, AV_RL32(subtype
));
715 st
->codec
->codec_id
= ff_codec_guid_get_id(ff_video_guids
, subtype
);
717 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
)
718 av_log(s
, AV_LOG_WARNING
, "unknown subtype:"FF_PRI_GUID
"\n", FF_ARG_GUID(subtype
));
720 } else if (!ff_guidcmp(mediatype
, mediatype_mpeg2_pes
) &&
721 !ff_guidcmp(subtype
, mediasubtype_dvb_subtitle
)) {
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
= AV_CODEC_ID_DVB_SUBTITLE
;
730 } else if (!ff_guidcmp(mediatype
, mediatype_mstvcaption
) &&
731 (!ff_guidcmp(subtype
, mediasubtype_teletext
) || !ff_guidcmp(subtype
, mediasubtype_dtvccdata
))) {
732 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_SUBTITLE
);
735 if (ff_guidcmp(formattype
, ff_format_none
))
736 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
738 st
->codec
->codec_id
= !ff_guidcmp(subtype
, mediasubtype_teletext
) ? AV_CODEC_ID_DVB_TELETEXT
: AV_CODEC_ID_EIA_608
;
740 } else if (!ff_guidcmp(mediatype
, mediatype_mpeg2_sections
) &&
741 !ff_guidcmp(subtype
, mediasubtype_mpeg2_sections
)) {
742 if (ff_guidcmp(formattype
, ff_format_none
))
743 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
748 av_log(s
, AV_LOG_WARNING
, "unknown media type, mediatype:"FF_PRI_GUID
749 ", subtype:"FF_PRI_GUID
", formattype:"FF_PRI_GUID
"\n",
750 FF_ARG_GUID(mediatype
), FF_ARG_GUID(subtype
), FF_ARG_GUID(formattype
));
761 * Try to seek over a broken chunk
762 * @return <0 on error
764 static int recover(WtvContext
*wtv
, uint64_t broken_pos
)
766 AVIOContext
*pb
= wtv
->pb
;
768 for (i
= 0; i
< wtv
->nb_index_entries
; i
++) {
769 if (wtv
->index_entries
[i
].pos
> broken_pos
) {
770 int ret
= avio_seek(pb
, wtv
->index_entries
[i
].pos
, SEEK_SET
);
773 wtv
->pts
= wtv
->index_entries
[i
].timestamp
;
782 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
783 * @param seekts timestamp
784 * @param[out] len_ptr Length of data chunk
785 * @return stream index of data chunk, or <0 on error
787 static int parse_chunks(AVFormatContext
*s
, int mode
, int64_t seekts
, int *len_ptr
)
789 WtvContext
*wtv
= s
->priv_data
;
790 AVIOContext
*pb
= wtv
->pb
;
791 while (!avio_feof(pb
)) {
793 int len
, sid
, consumed
;
801 av_log(s
, AV_LOG_WARNING
, "encountered broken chunk\n");
802 if ((ret
= recover(wtv
, avio_tell(pb
) - 20)) < 0)
806 sid
= avio_rl32(pb
) & 0x7FFF;
810 if (!ff_guidcmp(g
, ff_SBE2_STREAM_DESC_EVENT
)) {
811 if (ff_find_stream_index(s
, sid
) < 0) {
812 ff_asf_guid mediatype
, subtype
, formattype
;
815 ff_get_guid(pb
, &mediatype
);
816 ff_get_guid(pb
, &subtype
);
818 ff_get_guid(pb
, &formattype
);
819 size
= avio_rl32(pb
);
820 parse_media_type(s
, 0, sid
, mediatype
, subtype
, formattype
, size
);
821 consumed
+= 92 + size
;
823 } else if (!ff_guidcmp(g
, ff_stream2_guid
)) {
824 int stream_index
= ff_find_stream_index(s
, sid
);
825 if (stream_index
>= 0 && s
->streams
[stream_index
]->priv_data
&& !((WtvStream
*)s
->streams
[stream_index
]->priv_data
)->seen_data
) {
826 ff_asf_guid mediatype
, subtype
, formattype
;
829 ff_get_guid(pb
, &mediatype
);
830 ff_get_guid(pb
, &subtype
);
832 ff_get_guid(pb
, &formattype
);
833 size
= avio_rl32(pb
);
834 parse_media_type(s
, s
->streams
[stream_index
], sid
, mediatype
, subtype
, formattype
, size
);
835 consumed
+= 76 + size
;
837 } else if (!ff_guidcmp(g
, EVENTID_AudioDescriptorSpanningEvent
) ||
838 !ff_guidcmp(g
, EVENTID_CtxADescriptorSpanningEvent
) ||
839 !ff_guidcmp(g
, EVENTID_CSDescriptorSpanningEvent
) ||
840 !ff_guidcmp(g
, EVENTID_StreamIDSpanningEvent
) ||
841 !ff_guidcmp(g
, EVENTID_SubtitleSpanningEvent
) ||
842 !ff_guidcmp(g
, EVENTID_TeletextSpanningEvent
)) {
843 int stream_index
= ff_find_stream_index(s
, sid
);
844 if (stream_index
>= 0) {
845 AVStream
*st
= s
->streams
[stream_index
];
847 const uint8_t *pbuf
= buf
;
852 if (!ff_guidcmp(g
, EVENTID_CtxADescriptorSpanningEvent
) ||
853 !ff_guidcmp(g
, EVENTID_CSDescriptorSpanningEvent
)) {
858 buf_size
= FFMIN(len
- consumed
, sizeof(buf
));
859 avio_read(pb
, buf
, buf_size
);
860 consumed
+= buf_size
;
861 ff_parse_mpeg2_descriptor(s
, st
, 0, &pbuf
, buf
+ buf_size
, NULL
, 0, 0, NULL
);
863 } else if (!ff_guidcmp(g
, EVENTID_AudioTypeSpanningEvent
)) {
864 int stream_index
= ff_find_stream_index(s
, sid
);
865 if (stream_index
>= 0) {
866 AVStream
*st
= s
->streams
[stream_index
];
869 audio_type
= avio_r8(pb
);
871 st
->disposition
|= AV_DISPOSITION_HEARING_IMPAIRED
;
872 else if (audio_type
== 3)
873 st
->disposition
|= AV_DISPOSITION_VISUAL_IMPAIRED
;
876 } else if (!ff_guidcmp(g
, EVENTID_DVBScramblingControlSpanningEvent
)) {
877 int stream_index
= ff_find_stream_index(s
, sid
);
878 if (stream_index
>= 0) {
881 av_log(s
, AV_LOG_WARNING
, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index
);
884 } else if (!ff_guidcmp(g
, EVENTID_LanguageSpanningEvent
)) {
885 int stream_index
= ff_find_stream_index(s
, sid
);
886 if (stream_index
>= 0) {
887 AVStream
*st
= s
->streams
[stream_index
];
890 avio_read(pb
, language
, 3);
893 av_dict_set(&st
->metadata
, "language", language
, 0);
894 if (!strcmp(language
, "nar") || !strcmp(language
, "NAR"))
895 st
->disposition
|= AV_DISPOSITION_VISUAL_IMPAIRED
;
899 } else if (!ff_guidcmp(g
, ff_timestamp_guid
)) {
900 int stream_index
= ff_find_stream_index(s
, sid
);
901 if (stream_index
>= 0) {
903 wtv
->pts
= avio_rl64(pb
);
906 wtv
->pts
= AV_NOPTS_VALUE
;
908 wtv
->last_valid_pts
= wtv
->pts
;
909 if (wtv
->epoch
== AV_NOPTS_VALUE
|| wtv
->pts
< wtv
->epoch
)
910 wtv
->epoch
= wtv
->pts
;
911 if (mode
== SEEK_TO_PTS
&& wtv
->pts
>= seekts
) {
912 avio_skip(pb
, WTV_PAD8(len
) - consumed
);
917 } else if (!ff_guidcmp(g
, ff_data_guid
)) {
918 int stream_index
= ff_find_stream_index(s
, sid
);
919 if (mode
== SEEK_TO_DATA
&& stream_index
>= 0 && len
> 32 && s
->streams
[stream_index
]->priv_data
) {
920 WtvStream
*wst
= s
->streams
[stream_index
]->priv_data
;
927 } 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})) {
928 int stream_index
= ff_find_stream_index(s
, sid
);
929 if (stream_index
>= 0)
930 av_log(s
, AV_LOG_WARNING
, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index
);
932 !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}) ||
933 !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}) ||
934 !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}) ||
935 !ff_guidcmp(g
, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES
) ||
936 !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}) ||
937 !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}) ||
938 !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}) ||
939 !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}) ||
940 !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}) ||
941 !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}) ||
942 !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}) ||
943 !ff_guidcmp(g
, (const ff_asf_guid
){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
944 !ff_guidcmp(g
, (const ff_asf_guid
){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
945 !ff_guidcmp(g
, (const ff_asf_guid
){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
946 !ff_guidcmp(g
, (const ff_asf_guid
){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
947 !ff_guidcmp(g
, (const ff_asf_guid
){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
948 !ff_guidcmp(g
, ff_index_guid
) ||
949 !ff_guidcmp(g
, ff_sync_guid
) ||
950 !ff_guidcmp(g
, ff_stream1_guid
) ||
951 !ff_guidcmp(g
, (const ff_asf_guid
){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
954 av_log(s
, AV_LOG_WARNING
, "unsupported chunk:"FF_PRI_GUID
"\n", FF_ARG_GUID(g
));
956 avio_skip(pb
, WTV_PAD8(len
) - consumed
);
961 static int read_header(AVFormatContext
*s
)
963 WtvContext
*wtv
= s
->priv_data
;
964 int root_sector
, root_size
;
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);
1001 avio_seek(wtv
->pb
, -32, SEEK_CUR
);
1003 timeline_pos
= avio_tell(s
->pb
); // save before opening another file
1006 pb
= wtvfile_open(s
, root
, root_size
, ff_table_0_entries_legacy_attrib_le16
);
1008 parse_legacy_attrib(s
, pb
);
1012 /* read seek index */
1013 if (s
->nb_streams
) {
1014 AVStream
*st
= s
->streams
[0];
1015 pb
= wtvfile_open(s
, root
, root_size
, ff_table_0_entries_time_le16
);
1018 uint64_t timestamp
= avio_rl64(pb
);
1019 uint64_t frame_nb
= avio_rl64(pb
);
1022 ff_add_index_entry(&wtv
->index_entries
, &wtv
->nb_index_entries
, &wtv
->index_entries_allocated_size
,
1023 0, timestamp
, frame_nb
, 0, AVINDEX_KEYFRAME
);
1027 if (wtv
->nb_index_entries
) {
1028 pb
= wtvfile_open(s
, root
, root_size
, ff_timeline_table_0_entries_Events_le16
);
1032 uint64_t frame_nb
= avio_rl64(pb
);
1033 uint64_t position
= avio_rl64(pb
);
1036 for (i
= wtv
->nb_index_entries
- 1; i
>= 0; i
--) {
1037 AVIndexEntry
*e
= wtv
->index_entries
+ i
;
1038 if (frame_nb
> e
->size
)
1040 if (position
> e
->pos
)
1045 st
->duration
= wtv
->index_entries
[wtv
->nb_index_entries
- 1].timestamp
;
1051 avio_seek(s
->pb
, timeline_pos
, SEEK_SET
);
1055 static int read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
1057 WtvContext
*wtv
= s
->priv_data
;
1058 AVIOContext
*pb
= wtv
->pb
;
1059 int stream_index
, len
, ret
;
1061 stream_index
= parse_chunks(s
, SEEK_TO_DATA
, 0, &len
);
1062 if (stream_index
< 0)
1063 return stream_index
;
1065 ret
= av_get_packet(pb
, pkt
, len
- 32);
1068 pkt
->stream_index
= stream_index
;
1069 pkt
->pts
= wtv
->pts
;
1070 avio_skip(pb
, WTV_PAD8(len
) - len
);
1074 static int read_seek(AVFormatContext
*s
, int stream_index
,
1075 int64_t ts
, int flags
)
1077 WtvContext
*wtv
= s
->priv_data
;
1078 AVIOContext
*pb
= wtv
->pb
;
1079 AVStream
*st
= s
->streams
[0];
1080 int64_t ts_relative
;
1083 if ((flags
& AVSEEK_FLAG_FRAME
) || (flags
& AVSEEK_FLAG_BYTE
))
1084 return AVERROR(ENOSYS
);
1086 /* timestamp adjustment is required because wtv->pts values are absolute,
1087 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1089 if (wtv
->epoch
!= AV_NOPTS_VALUE
)
1090 ts_relative
-= wtv
->epoch
;
1092 i
= ff_index_search_timestamp(wtv
->index_entries
, wtv
->nb_index_entries
, ts_relative
, flags
);
1094 if (wtv
->last_valid_pts
== AV_NOPTS_VALUE
|| ts
< wtv
->last_valid_pts
) {
1095 if (avio_seek(pb
, 0, SEEK_SET
) < 0)
1097 } else if (st
->duration
!= AV_NOPTS_VALUE
&& ts_relative
> st
->duration
&& wtv
->nb_index_entries
) {
1098 if (avio_seek(pb
, wtv
->index_entries
[wtv
->nb_index_entries
- 1].pos
, SEEK_SET
) < 0)
1101 if (parse_chunks(s
, SEEK_TO_PTS
, ts
, 0) < 0)
1102 return AVERROR(ERANGE
);
1105 if (avio_seek(pb
, wtv
->index_entries
[i
].pos
, SEEK_SET
) < 0)
1107 wtv
->pts
= wtv
->index_entries
[i
].timestamp
;
1108 if (wtv
->epoch
!= AV_NOPTS_VALUE
)
1109 wtv
->pts
+= wtv
->epoch
;
1110 wtv
->last_valid_pts
= wtv
->pts
;
1114 static int read_close(AVFormatContext
*s
)
1116 WtvContext
*wtv
= s
->priv_data
;
1117 av_freep(&wtv
->index_entries
);
1118 wtvfile_close(wtv
->pb
);
1122 AVInputFormat ff_wtv_demuxer
= {
1124 .long_name
= NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1125 .priv_data_size
= sizeof(WtvContext
),
1126 .read_probe
= read_probe
,
1127 .read_header
= read_header
,
1128 .read_packet
= read_packet
,
1129 .read_seek
= read_seek
,
1130 .read_close
= read_close
,
1131 .flags
= AVFMT_SHOW_IDS
,