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"
38 /* Macros for formating GUIDs */
39 #define PRI_PRETTY_GUID \
40 "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
41 #define ARG_PRETTY_GUID(g) \
42 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]
43 #define LEN_PRETTY_GUID 34
47 * File system routines
52 AVIOContext
*pb_filesystem
; /**< file system (AVFormatContext->pb) */
54 int sector_bits
; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
55 uint32_t *sectors
; /**< file allocation table */
56 int nb_sectors
; /**< number of sectors */
63 static int64_t seek_by_sector(AVIOContext
*pb
, int64_t sector
, int64_t offset
)
65 return avio_seek(pb
, (sector
<< WTV_SECTOR_BITS
) + offset
, SEEK_SET
);
69 * @return bytes read, 0 on end of file, or <0 on error
71 static int wtvfile_read_packet(void *opaque
, uint8_t *buf
, int buf_size
)
74 AVIOContext
*pb
= wf
->pb_filesystem
;
77 if (wf
->error
|| pb
->error
)
79 if (wf
->position
>= wf
->length
|| avio_feof(pb
))
82 buf_size
= FFMIN(buf_size
, wf
->length
- wf
->position
);
83 while(nread
< buf_size
) {
85 int remaining_in_sector
= (1 << wf
->sector_bits
) - (wf
->position
& ((1 << wf
->sector_bits
) - 1));
86 int read_request
= FFMIN(buf_size
- nread
, remaining_in_sector
);
88 n
= avio_read(pb
, buf
, read_request
);
94 if (n
== remaining_in_sector
) {
95 int i
= wf
->position
>> wf
->sector_bits
;
96 if (i
>= wf
->nb_sectors
||
97 (wf
->sectors
[i
] != wf
->sectors
[i
- 1] + (1 << (wf
->sector_bits
- WTV_SECTOR_BITS
)) &&
98 seek_by_sector(pb
, wf
->sectors
[i
], 0) < 0)) {
108 * @return position (or file length)
110 static int64_t wtvfile_seek(void *opaque
, int64_t offset
, int whence
)
112 WtvFile
*wf
= opaque
;
113 AVIOContext
*pb
= wf
->pb_filesystem
;
115 if (whence
== AVSEEK_SIZE
)
117 else if (whence
== SEEK_CUR
)
118 offset
= wf
->position
+ offset
;
119 else if (whence
== SEEK_END
)
122 wf
->error
= offset
< 0 || offset
>= wf
->length
||
123 seek_by_sector(pb
, wf
->sectors
[offset
>> wf
->sector_bits
],
124 offset
& ((1 << wf
->sector_bits
) - 1)) < 0;
125 wf
->position
= offset
;
130 * read non-zero integers (le32) from input stream
132 * @param[out] data destination
133 * @param count maximum number of integers to read
134 * @return total number of integers read
136 static int read_ints(AVIOContext
*pb
, uint32_t *data
, int count
)
139 for (i
= 0; i
< count
; i
++) {
140 if ((data
[total
] = avio_rl32(pb
)))
148 * @param first_sector First sector
149 * @param length Length of file (bytes)
150 * @param depth File allocation table depth
151 * @return NULL on error
153 static AVIOContext
* wtvfile_open_sector(int first_sector
, uint64_t length
, int depth
, AVFormatContext
*s
)
160 if (seek_by_sector(s
->pb
, first_sector
, 0) < 0)
163 wf
= av_mallocz(sizeof(WtvFile
));
168 wf
->sectors
= av_malloc(sizeof(uint32_t));
173 wf
->sectors
[0] = first_sector
;
175 } else if (depth
== 1) {
176 wf
->sectors
= av_malloc(WTV_SECTOR_SIZE
);
181 wf
->nb_sectors
= read_ints(s
->pb
, wf
->sectors
, WTV_SECTOR_SIZE
/ 4);
182 } else if (depth
== 2) {
183 uint32_t sectors1
[WTV_SECTOR_SIZE
/ 4];
184 int nb_sectors1
= read_ints(s
->pb
, sectors1
, WTV_SECTOR_SIZE
/ 4);
187 wf
->sectors
= av_malloc_array(nb_sectors1
, 1 << WTV_SECTOR_BITS
);
193 for (i
= 0; i
< nb_sectors1
; i
++) {
194 if (seek_by_sector(s
->pb
, sectors1
[i
], 0) < 0)
196 wf
->nb_sectors
+= read_ints(s
->pb
, wf
->sectors
+ i
* WTV_SECTOR_SIZE
/ 4, WTV_SECTOR_SIZE
/ 4);
199 av_log(s
, AV_LOG_ERROR
, "unsupported file allocation table depth (0x%x)\n", depth
);
203 wf
->sector_bits
= length
& (1ULL<<63) ? WTV_SECTOR_BITS
: WTV_BIGSECTOR_BITS
;
205 if (!wf
->nb_sectors
) {
206 av_free(wf
->sectors
);
211 size
= avio_size(s
->pb
);
212 if (size
>= 0 && (int64_t)wf
->sectors
[wf
->nb_sectors
- 1] << WTV_SECTOR_BITS
> size
)
213 av_log(s
, AV_LOG_WARNING
, "truncated file\n");
216 length
&= 0xFFFFFFFFFFFF;
217 if (length
> ((int64_t)wf
->nb_sectors
<< wf
->sector_bits
)) {
218 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
);
219 length
= (int64_t)wf
->nb_sectors
<< wf
->sector_bits
;
223 /* seek to initial sector */
225 if (seek_by_sector(s
->pb
, wf
->sectors
[0], 0) < 0) {
226 av_free(wf
->sectors
);
231 wf
->pb_filesystem
= s
->pb
;
232 buffer
= av_malloc(1 << wf
->sector_bits
);
234 av_free(wf
->sectors
);
239 pb
= avio_alloc_context(buffer
, 1 << wf
->sector_bits
, 0, wf
,
240 wtvfile_read_packet
, NULL
, wtvfile_seek
);
243 av_free(wf
->sectors
);
250 * Open file using filename
251 * @param[in] buf directory buffer
252 * @param buf_size directory buffer size
253 * @param[in] filename
254 * @param filename_size size of filename
255 * @return NULL on error
257 static AVIOContext
* wtvfile_open2(AVFormatContext
*s
, const uint8_t *buf
, int buf_size
, const uint8_t *filename
, int filename_size
)
259 const uint8_t *buf_end
= buf
+ buf_size
;
261 while(buf
+ 48 <= buf_end
) {
262 int dir_length
, name_size
, first_sector
, depth
;
263 uint64_t file_length
;
265 if (ff_guidcmp(buf
, ff_dir_entry_guid
)) {
266 av_log(s
, AV_LOG_ERROR
, "unknown guid "FF_PRI_GUID
", expected dir_entry_guid; "
267 "remaining directory entries ignored\n", FF_ARG_GUID(buf
));
270 dir_length
= AV_RL16(buf
+ 16);
271 file_length
= AV_RL64(buf
+ 24);
272 name_size
= 2 * AV_RL32(buf
+ 32);
274 av_log(s
, AV_LOG_ERROR
,
275 "bad filename length, remaining directory entries ignored\n");
278 if (48 + (int64_t)name_size
> buf_end
- buf
) {
279 av_log(s
, AV_LOG_ERROR
, "filename exceeds buffer size; remaining directory entries ignored\n");
282 first_sector
= AV_RL32(buf
+ 40 + name_size
);
283 depth
= AV_RL32(buf
+ 44 + name_size
);
285 /* compare file name; test optional null terminator */
287 if (name_size
>= filename_size
&&
288 !memcmp(name
, filename
, filename_size
) &&
289 (name_size
< filename_size
+ 2 || !AV_RN16(name
+ filename_size
)))
290 return wtvfile_open_sector(first_sector
, file_length
, depth
, s
);
297 #define wtvfile_open(s, buf, buf_size, filename) \
298 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
301 * Close file opened with wtvfile_open_sector(), or wtv_open()
303 static void wtvfile_close(AVIOContext
*pb
)
305 WtvFile
*wf
= pb
->opaque
;
306 av_free(wf
->sectors
);
307 av_freep(&pb
->opaque
);
308 av_freep(&pb
->buffer
);
323 AVIOContext
*pb
; /**< timeline file */
325 int64_t pts
; /**< pts for next data chunk */
326 int64_t last_valid_pts
; /**< latest valid pts, used for interative seeking */
328 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
329 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
330 AVIndexEntry
*index_entries
;
331 int nb_index_entries
;
332 unsigned int index_entries_allocated_size
;
336 static const ff_asf_guid EVENTID_SubtitleSpanningEvent
=
337 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
338 static const ff_asf_guid EVENTID_LanguageSpanningEvent
=
339 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
340 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent
=
341 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
342 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent
=
343 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
344 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent
=
345 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
346 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent
=
347 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
348 static const ff_asf_guid EVENTID_StreamIDSpanningEvent
=
349 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
350 static const ff_asf_guid EVENTID_TeletextSpanningEvent
=
351 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
352 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent
=
353 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
355 /* Windows media GUIDs */
358 static const ff_asf_guid mediasubtype_mpeg1payload
=
359 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
360 static const ff_asf_guid mediatype_mpeg2_sections
=
361 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
362 static const ff_asf_guid mediatype_mpeg2_pes
=
363 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
364 static const ff_asf_guid mediatype_mstvcaption
=
365 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
368 static const ff_asf_guid mediasubtype_dvb_subtitle
=
369 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
370 static const ff_asf_guid mediasubtype_teletext
=
371 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
372 static const ff_asf_guid mediasubtype_dtvccdata
=
373 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
374 static const ff_asf_guid mediasubtype_mpeg2_sections
=
375 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
377 static int read_probe(AVProbeData
*p
)
379 return ff_guidcmp(p
->buf
, ff_wtv_guid
) ? 0 : AVPROBE_SCORE_MAX
;
383 * Convert win32 FILETIME to ISO-8601 string
384 * @return <0 on error
386 static int filetime_to_iso8601(char *buf
, int buf_size
, int64_t value
)
388 time_t t
= (value
/ 10000000LL) - 11644473600LL;
389 struct tm
*tm
= gmtime(&t
);
392 strftime(buf
, buf_size
, "%Y-%m-%d %H:%M:%S", gmtime(&t
));
397 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
398 * @return <0 on error
400 static int crazytime_to_iso8601(char *buf
, int buf_size
, int64_t value
)
402 time_t t
= (value
/ 10000000LL) - 719162LL*86400LL;
403 struct tm
*tm
= gmtime(&t
);
406 strftime(buf
, buf_size
, "%Y-%m-%d %H:%M:%S", gmtime(&t
));
411 * Convert OLE DATE to ISO-8601 string
412 * @return <0 on error
414 static int oledate_to_iso8601(char *buf
, int buf_size
, int64_t value
)
416 time_t t
= (av_int2double(value
) - 25569.0) * 86400;
417 struct tm
*result
= gmtime(&t
);
420 strftime(buf
, buf_size
, "%Y-%m-%d %H:%M:%S", result
);
424 static void get_attachment(AVFormatContext
*s
, AVIOContext
*pb
, int length
)
427 char description
[1024];
428 unsigned int filesize
;
431 int64_t pos
= avio_tell(pb
);
433 avio_get_str16le(pb
, INT_MAX
, mime
, sizeof(mime
));
434 if (strcmp(mime
, "image/jpeg"))
438 avio_get_str16le(pb
, INT_MAX
, description
, sizeof(description
));
439 filesize
= avio_rl32(pb
);
443 st
= avformat_new_stream(s
, NULL
);
446 av_dict_set(&st
->metadata
, "title", description
, 0);
447 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
448 st
->codec
->codec_id
= AV_CODEC_ID_MJPEG
;
450 ret
= av_get_packet(pb
, &st
->attached_pic
, filesize
);
453 st
->attached_pic
.stream_index
= st
->index
;
454 st
->attached_pic
.flags
|= AV_PKT_FLAG_KEY
;
455 st
->disposition
|= AV_DISPOSITION_ATTACHED_PIC
;
457 avio_seek(pb
, pos
+ length
, SEEK_SET
);
460 static void get_tag(AVFormatContext
*s
, AVIOContext
*pb
, const char *key
, int type
, int length
)
465 if (!strcmp(key
, "WM/MediaThumbType")) {
466 avio_skip(pb
, length
);
470 buf_size
= FFMAX(2*length
, LEN_PRETTY_GUID
) + 1;
471 buf
= av_malloc(buf_size
);
475 if (type
== 0 && length
== 4) {
476 snprintf(buf
, buf_size
, "%u", avio_rl32(pb
));
477 } else if (type
== 1) {
478 avio_get_str16le(pb
, length
, buf
, buf_size
);
483 } else if (type
== 3 && length
== 4) {
484 strcpy(buf
, avio_rl32(pb
) ? "true" : "false");
485 } else if (type
== 4 && length
== 8) {
486 int64_t num
= avio_rl64(pb
);
487 if (!strcmp(key
, "WM/EncodingTime") ||
488 !strcmp(key
, "WM/MediaOriginalBroadcastDateTime")) {
489 if (filetime_to_iso8601(buf
, buf_size
, num
) < 0) {
493 } else if (!strcmp(key
, "WM/WMRVEncodeTime") ||
494 !strcmp(key
, "WM/WMRVEndTime")) {
495 if (crazytime_to_iso8601(buf
, buf_size
, num
) < 0) {
499 } else if (!strcmp(key
, "WM/WMRVExpirationDate")) {
500 if (oledate_to_iso8601(buf
, buf_size
, num
) < 0 ) {
504 } else if (!strcmp(key
, "WM/WMRVBitrate"))
505 snprintf(buf
, buf_size
, "%f", av_int2double(num
));
507 snprintf(buf
, buf_size
, "%"PRIi64
, num
);
508 } else if (type
== 5 && length
== 2) {
509 snprintf(buf
, buf_size
, "%u", avio_rl16(pb
));
510 } else if (type
== 6 && length
== 16) {
512 avio_read(pb
, guid
, 16);
513 snprintf(buf
, buf_size
, PRI_PRETTY_GUID
, ARG_PRETTY_GUID(guid
));
514 } else if (type
== 2 && !strcmp(key
, "WM/Picture")) {
515 get_attachment(s
, pb
, length
);
520 av_log(s
, AV_LOG_WARNING
, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key
, type
, length
);
521 avio_skip(pb
, length
);
525 av_dict_set(&s
->metadata
, key
, buf
, 0);
530 * Parse metadata entries
532 static void parse_legacy_attrib(AVFormatContext
*s
, AVIOContext
*pb
)
536 while(!avio_feof(pb
)) {
538 ff_get_guid(pb
, &guid
);
539 type
= avio_rl32(pb
);
540 length
= avio_rl32(pb
);
543 if (ff_guidcmp(&guid
, ff_metadata_guid
)) {
544 av_log(s
, AV_LOG_WARNING
, "unknown guid "FF_PRI_GUID
", expected metadata_guid; "
545 "remaining metadata entries ignored\n", FF_ARG_GUID(guid
));
548 avio_get_str16le(pb
, INT_MAX
, key
, sizeof(key
));
549 get_tag(s
, pb
, key
, type
, length
);
552 ff_metadata_conv(&s
->metadata
, NULL
, ff_asf_metadata_conv
);
556 * parse VIDEOINFOHEADER2 structure
557 * @return bytes consumed
559 static int parse_videoinfoheader2(AVFormatContext
*s
, AVStream
*st
)
561 WtvContext
*wtv
= s
->priv_data
;
562 AVIOContext
*pb
= wtv
->pb
;
564 avio_skip(pb
, 72); // picture aspect ratio is unreliable
565 st
->codec
->codec_tag
= ff_get_bmp_header(pb
, st
, NULL
);
571 * Parse MPEG1WAVEFORMATEX extradata structure
573 static void parse_mpeg1waveformatex(AVStream
*st
)
576 switch (AV_RL16(st
->codec
->extradata
)) {
577 case 0x0001 : st
->codec
->codec_id
= AV_CODEC_ID_MP1
; break;
578 case 0x0002 : st
->codec
->codec_id
= AV_CODEC_ID_MP2
; break;
579 case 0x0004 : st
->codec
->codec_id
= AV_CODEC_ID_MP3
; break;
582 st
->codec
->bit_rate
= AV_RL32(st
->codec
->extradata
+ 2); /* dwHeadBitrate */
585 switch (AV_RL16(st
->codec
->extradata
+ 6)) {
588 case 4 : st
->codec
->channels
= 2;
589 st
->codec
->channel_layout
= AV_CH_LAYOUT_STEREO
;
591 case 8 : st
->codec
->channels
= 1;
592 st
->codec
->channel_layout
= AV_CH_LAYOUT_MONO
;
599 * @param st Stream to initialise, or NULL to create and initialise new stream
600 * @return NULL on error
602 static AVStream
* new_stream(AVFormatContext
*s
, AVStream
*st
, int sid
, int codec_type
)
605 if (st
->codec
->extradata
) {
606 av_freep(&st
->codec
->extradata
);
607 st
->codec
->extradata_size
= 0;
610 WtvStream
*wst
= av_mallocz(sizeof(WtvStream
));
613 st
= avformat_new_stream(s
, NULL
);
621 st
->codec
->codec_type
= codec_type
;
622 st
->need_parsing
= AVSTREAM_PARSE_FULL
;
623 avpriv_set_pts_info(st
, 64, 1, 10000000);
628 * parse Media Type structure and populate stream
629 * @param st Stream, or NULL to create new stream
630 * @param mediatype Mediatype GUID
631 * @param subtype Subtype GUID
632 * @param formattype Format GUID
633 * @param size Size of format buffer
634 * @return NULL on error
636 static AVStream
* parse_media_type(AVFormatContext
*s
, AVStream
*st
, int sid
,
637 ff_asf_guid mediatype
, ff_asf_guid subtype
,
638 ff_asf_guid formattype
, uint64_t size
)
640 WtvContext
*wtv
= s
->priv_data
;
641 AVIOContext
*pb
= wtv
->pb
;
642 if (!ff_guidcmp(subtype
, ff_mediasubtype_cpfilters_processed
) &&
643 !ff_guidcmp(formattype
, ff_format_cpfilters_processed
)) {
644 ff_asf_guid actual_subtype
;
645 ff_asf_guid actual_formattype
;
648 av_log(s
, AV_LOG_WARNING
, "format buffer size underflow\n");
653 avio_skip(pb
, size
- 32);
654 ff_get_guid(pb
, &actual_subtype
);
655 ff_get_guid(pb
, &actual_formattype
);
656 avio_seek(pb
, -size
, SEEK_CUR
);
658 st
= parse_media_type(s
, st
, sid
, mediatype
, actual_subtype
, actual_formattype
, size
- 32);
661 } else if (!ff_guidcmp(mediatype
, ff_mediatype_audio
)) {
662 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_AUDIO
);
665 if (!ff_guidcmp(formattype
, ff_format_waveformatex
)) {
666 int ret
= ff_get_wav_header(pb
, st
->codec
, size
);
670 if (ff_guidcmp(formattype
, ff_format_none
))
671 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
675 if (!memcmp(subtype
+ 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID
}, 12)) {
676 st
->codec
->codec_id
= ff_wav_codec_get_id(AV_RL32(subtype
), st
->codec
->bits_per_coded_sample
);
677 } else if (!ff_guidcmp(subtype
, mediasubtype_mpeg1payload
)) {
678 if (st
->codec
->extradata
&& st
->codec
->extradata_size
>= 22)
679 parse_mpeg1waveformatex(st
);
681 av_log(s
, AV_LOG_WARNING
, "MPEG1WAVEFORMATEX underflow\n");
683 st
->codec
->codec_id
= ff_codec_guid_get_id(ff_codec_wav_guids
, subtype
);
684 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
)
685 av_log(s
, AV_LOG_WARNING
, "unknown subtype:"FF_PRI_GUID
"\n", FF_ARG_GUID(subtype
));
688 } else if (!ff_guidcmp(mediatype
, ff_mediatype_video
)) {
689 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_VIDEO
);
692 if (!ff_guidcmp(formattype
, ff_format_videoinfo2
)) {
693 int consumed
= parse_videoinfoheader2(s
, st
);
694 avio_skip(pb
, FFMAX(size
- consumed
, 0));
695 } else if (!ff_guidcmp(formattype
, ff_format_mpeg2_video
)) {
696 uint64_t consumed
= parse_videoinfoheader2(s
, st
);
697 /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
698 avio_skip(pb
, FFMAX(size
- consumed
, 0));
700 if (ff_guidcmp(formattype
, ff_format_none
))
701 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
705 if (!memcmp(subtype
+ 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID
}, 12)) {
706 st
->codec
->codec_id
= ff_codec_get_id(ff_codec_bmp_tags
, AV_RL32(subtype
));
708 st
->codec
->codec_id
= ff_codec_guid_get_id(ff_video_guids
, subtype
);
710 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
)
711 av_log(s
, AV_LOG_WARNING
, "unknown subtype:"FF_PRI_GUID
"\n", FF_ARG_GUID(subtype
));
713 } else if (!ff_guidcmp(mediatype
, mediatype_mpeg2_pes
) &&
714 !ff_guidcmp(subtype
, mediasubtype_dvb_subtitle
)) {
715 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_SUBTITLE
);
718 if (ff_guidcmp(formattype
, ff_format_none
))
719 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
721 st
->codec
->codec_id
= AV_CODEC_ID_DVB_SUBTITLE
;
723 } else if (!ff_guidcmp(mediatype
, mediatype_mstvcaption
) &&
724 (!ff_guidcmp(subtype
, mediasubtype_teletext
) || !ff_guidcmp(subtype
, mediasubtype_dtvccdata
))) {
725 st
= new_stream(s
, st
, sid
, AVMEDIA_TYPE_SUBTITLE
);
728 if (ff_guidcmp(formattype
, ff_format_none
))
729 av_log(s
, AV_LOG_WARNING
, "unknown formattype:"FF_PRI_GUID
"\n", FF_ARG_GUID(formattype
));
731 st
->codec
->codec_id
= !ff_guidcmp(subtype
, mediasubtype_teletext
) ? AV_CODEC_ID_DVB_TELETEXT
: AV_CODEC_ID_EIA_608
;
733 } else if (!ff_guidcmp(mediatype
, mediatype_mpeg2_sections
) &&
734 !ff_guidcmp(subtype
, mediasubtype_mpeg2_sections
)) {
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
));
741 av_log(s
, AV_LOG_WARNING
, "unknown media type, mediatype:"FF_PRI_GUID
742 ", subtype:"FF_PRI_GUID
", formattype:"FF_PRI_GUID
"\n",
743 FF_ARG_GUID(mediatype
), FF_ARG_GUID(subtype
), FF_ARG_GUID(formattype
));
754 * Try to seek over a broken chunk
755 * @return <0 on error
757 static int recover(WtvContext
*wtv
, uint64_t broken_pos
)
759 AVIOContext
*pb
= wtv
->pb
;
761 for (i
= 0; i
< wtv
->nb_index_entries
; i
++) {
762 if (wtv
->index_entries
[i
].pos
> broken_pos
) {
763 int ret
= avio_seek(pb
, wtv
->index_entries
[i
].pos
, SEEK_SET
);
766 wtv
->pts
= wtv
->index_entries
[i
].timestamp
;
775 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
776 * @param seekts timestamp
777 * @param[out] len_ptr Length of data chunk
778 * @return stream index of data chunk, or <0 on error
780 static int parse_chunks(AVFormatContext
*s
, int mode
, int64_t seekts
, int *len_ptr
)
782 WtvContext
*wtv
= s
->priv_data
;
783 AVIOContext
*pb
= wtv
->pb
;
784 while (!avio_feof(pb
)) {
786 int len
, sid
, consumed
;
794 av_log(s
, AV_LOG_WARNING
, "encountered broken chunk\n");
795 if ((ret
= recover(wtv
, avio_tell(pb
) - 20)) < 0)
799 sid
= avio_rl32(pb
) & 0x7FFF;
803 if (!ff_guidcmp(g
, ff_SBE2_STREAM_DESC_EVENT
)) {
804 if (ff_find_stream_index(s
, sid
) < 0) {
805 ff_asf_guid mediatype
, subtype
, formattype
;
808 ff_get_guid(pb
, &mediatype
);
809 ff_get_guid(pb
, &subtype
);
811 ff_get_guid(pb
, &formattype
);
812 size
= avio_rl32(pb
);
813 parse_media_type(s
, 0, sid
, mediatype
, subtype
, formattype
, size
);
814 consumed
+= 92 + size
;
816 } else if (!ff_guidcmp(g
, ff_stream2_guid
)) {
817 int stream_index
= ff_find_stream_index(s
, sid
);
818 if (stream_index
>= 0 && s
->streams
[stream_index
]->priv_data
&& !((WtvStream
*)s
->streams
[stream_index
]->priv_data
)->seen_data
) {
819 ff_asf_guid mediatype
, subtype
, formattype
;
822 ff_get_guid(pb
, &mediatype
);
823 ff_get_guid(pb
, &subtype
);
825 ff_get_guid(pb
, &formattype
);
826 size
= avio_rl32(pb
);
827 parse_media_type(s
, s
->streams
[stream_index
], sid
, mediatype
, subtype
, formattype
, size
);
828 consumed
+= 76 + size
;
830 } else if (!ff_guidcmp(g
, EVENTID_AudioDescriptorSpanningEvent
) ||
831 !ff_guidcmp(g
, EVENTID_CtxADescriptorSpanningEvent
) ||
832 !ff_guidcmp(g
, EVENTID_CSDescriptorSpanningEvent
) ||
833 !ff_guidcmp(g
, EVENTID_StreamIDSpanningEvent
) ||
834 !ff_guidcmp(g
, EVENTID_SubtitleSpanningEvent
) ||
835 !ff_guidcmp(g
, EVENTID_TeletextSpanningEvent
)) {
836 int stream_index
= ff_find_stream_index(s
, sid
);
837 if (stream_index
>= 0) {
838 AVStream
*st
= s
->streams
[stream_index
];
840 const uint8_t *pbuf
= buf
;
845 if (!ff_guidcmp(g
, EVENTID_CtxADescriptorSpanningEvent
) ||
846 !ff_guidcmp(g
, EVENTID_CSDescriptorSpanningEvent
)) {
851 buf_size
= FFMIN(len
- consumed
, sizeof(buf
));
852 avio_read(pb
, buf
, buf_size
);
853 consumed
+= buf_size
;
854 ff_parse_mpeg2_descriptor(s
, st
, 0, &pbuf
, buf
+ buf_size
, NULL
, 0, 0, NULL
);
856 } else if (!ff_guidcmp(g
, EVENTID_AudioTypeSpanningEvent
)) {
857 int stream_index
= ff_find_stream_index(s
, sid
);
858 if (stream_index
>= 0) {
859 AVStream
*st
= s
->streams
[stream_index
];
862 audio_type
= avio_r8(pb
);
864 st
->disposition
|= AV_DISPOSITION_HEARING_IMPAIRED
;
865 else if (audio_type
== 3)
866 st
->disposition
|= AV_DISPOSITION_VISUAL_IMPAIRED
;
869 } else if (!ff_guidcmp(g
, EVENTID_DVBScramblingControlSpanningEvent
)) {
870 int stream_index
= ff_find_stream_index(s
, sid
);
871 if (stream_index
>= 0) {
874 av_log(s
, AV_LOG_WARNING
, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index
);
877 } else if (!ff_guidcmp(g
, EVENTID_LanguageSpanningEvent
)) {
878 int stream_index
= ff_find_stream_index(s
, sid
);
879 if (stream_index
>= 0) {
880 AVStream
*st
= s
->streams
[stream_index
];
883 avio_read(pb
, language
, 3);
886 av_dict_set(&st
->metadata
, "language", language
, 0);
887 if (!strcmp(language
, "nar") || !strcmp(language
, "NAR"))
888 st
->disposition
|= AV_DISPOSITION_VISUAL_IMPAIRED
;
892 } else if (!ff_guidcmp(g
, ff_timestamp_guid
)) {
893 int stream_index
= ff_find_stream_index(s
, sid
);
894 if (stream_index
>= 0) {
896 wtv
->pts
= avio_rl64(pb
);
899 wtv
->pts
= AV_NOPTS_VALUE
;
901 wtv
->last_valid_pts
= wtv
->pts
;
902 if (wtv
->epoch
== AV_NOPTS_VALUE
|| wtv
->pts
< wtv
->epoch
)
903 wtv
->epoch
= wtv
->pts
;
904 if (mode
== SEEK_TO_PTS
&& wtv
->pts
>= seekts
) {
905 avio_skip(pb
, WTV_PAD8(len
) - consumed
);
910 } else if (!ff_guidcmp(g
, ff_data_guid
)) {
911 int stream_index
= ff_find_stream_index(s
, sid
);
912 if (mode
== SEEK_TO_DATA
&& stream_index
>= 0 && len
> 32 && s
->streams
[stream_index
]->priv_data
) {
913 WtvStream
*wst
= s
->streams
[stream_index
]->priv_data
;
920 } 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})) {
921 int stream_index
= ff_find_stream_index(s
, sid
);
922 if (stream_index
>= 0)
923 av_log(s
, AV_LOG_WARNING
, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index
);
925 !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}) ||
926 !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}) ||
927 !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}) ||
928 !ff_guidcmp(g
, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES
) ||
929 !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}) ||
930 !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}) ||
931 !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}) ||
932 !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}) ||
933 !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}) ||
934 !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}) ||
935 !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}) ||
936 !ff_guidcmp(g
, (const ff_asf_guid
){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
937 !ff_guidcmp(g
, (const ff_asf_guid
){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
938 !ff_guidcmp(g
, (const ff_asf_guid
){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
939 !ff_guidcmp(g
, (const ff_asf_guid
){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
940 !ff_guidcmp(g
, (const ff_asf_guid
){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
941 !ff_guidcmp(g
, ff_index_guid
) ||
942 !ff_guidcmp(g
, ff_sync_guid
) ||
943 !ff_guidcmp(g
, ff_stream1_guid
) ||
944 !ff_guidcmp(g
, (const ff_asf_guid
){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
947 av_log(s
, AV_LOG_WARNING
, "unsupported chunk:"FF_PRI_GUID
"\n", FF_ARG_GUID(g
));
949 avio_skip(pb
, WTV_PAD8(len
) - consumed
);
954 static int read_header(AVFormatContext
*s
)
956 WtvContext
*wtv
= s
->priv_data
;
957 int root_sector
, root_size
;
958 uint8_t root
[WTV_SECTOR_SIZE
];
960 int64_t timeline_pos
;
965 wtv
->last_valid_pts
= AV_NOPTS_VALUE
;
967 /* read root directory sector */
968 avio_skip(s
->pb
, 0x30);
969 root_size
= avio_rl32(s
->pb
);
970 if (root_size
> sizeof(root
)) {
971 av_log(s
, AV_LOG_ERROR
, "root directory size exceeds sector size\n");
972 return AVERROR_INVALIDDATA
;
975 root_sector
= avio_rl32(s
->pb
);
977 seek_by_sector(s
->pb
, root_sector
, 0);
978 root_size
= avio_read(s
->pb
, root
, root_size
);
980 return AVERROR_INVALIDDATA
;
982 /* parse chunks up until first data chunk */
983 wtv
->pb
= wtvfile_open(s
, root
, root_size
, ff_timeline_le16
);
985 av_log(s
, AV_LOG_ERROR
, "timeline data missing\n");
986 return AVERROR_INVALIDDATA
;
989 ret
= parse_chunks(s
, SEEK_TO_DATA
, 0, 0);
992 avio_seek(wtv
->pb
, -32, SEEK_CUR
);
994 timeline_pos
= avio_tell(s
->pb
); // save before opening another file
997 pb
= wtvfile_open(s
, root
, root_size
, ff_table_0_entries_legacy_attrib_le16
);
999 parse_legacy_attrib(s
, pb
);
1003 /* read seek index */
1004 if (s
->nb_streams
) {
1005 AVStream
*st
= s
->streams
[0];
1006 pb
= wtvfile_open(s
, root
, root_size
, ff_table_0_entries_time_le16
);
1009 uint64_t timestamp
= avio_rl64(pb
);
1010 uint64_t frame_nb
= avio_rl64(pb
);
1013 ff_add_index_entry(&wtv
->index_entries
, &wtv
->nb_index_entries
, &wtv
->index_entries_allocated_size
,
1014 0, timestamp
, frame_nb
, 0, AVINDEX_KEYFRAME
);
1018 if (wtv
->nb_index_entries
) {
1019 pb
= wtvfile_open(s
, root
, root_size
, ff_timeline_table_0_entries_Events_le16
);
1023 uint64_t frame_nb
= avio_rl64(pb
);
1024 uint64_t position
= avio_rl64(pb
);
1027 for (i
= wtv
->nb_index_entries
- 1; i
>= 0; i
--) {
1028 AVIndexEntry
*e
= wtv
->index_entries
+ i
;
1029 if (frame_nb
> e
->size
)
1031 if (position
> e
->pos
)
1036 st
->duration
= wtv
->index_entries
[wtv
->nb_index_entries
- 1].timestamp
;
1042 avio_seek(s
->pb
, timeline_pos
, SEEK_SET
);
1046 static int read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
1048 WtvContext
*wtv
= s
->priv_data
;
1049 AVIOContext
*pb
= wtv
->pb
;
1050 int stream_index
, len
, ret
;
1052 stream_index
= parse_chunks(s
, SEEK_TO_DATA
, 0, &len
);
1053 if (stream_index
< 0)
1054 return stream_index
;
1056 ret
= av_get_packet(pb
, pkt
, len
- 32);
1059 pkt
->stream_index
= stream_index
;
1060 pkt
->pts
= wtv
->pts
;
1061 avio_skip(pb
, WTV_PAD8(len
) - len
);
1065 static int read_seek(AVFormatContext
*s
, int stream_index
,
1066 int64_t ts
, int flags
)
1068 WtvContext
*wtv
= s
->priv_data
;
1069 AVIOContext
*pb
= wtv
->pb
;
1070 AVStream
*st
= s
->streams
[0];
1071 int64_t ts_relative
;
1074 if ((flags
& AVSEEK_FLAG_FRAME
) || (flags
& AVSEEK_FLAG_BYTE
))
1075 return AVERROR(ENOSYS
);
1077 /* timestamp adjustment is required because wtv->pts values are absolute,
1078 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1080 if (wtv
->epoch
!= AV_NOPTS_VALUE
)
1081 ts_relative
-= wtv
->epoch
;
1083 i
= ff_index_search_timestamp(wtv
->index_entries
, wtv
->nb_index_entries
, ts_relative
, flags
);
1085 if (wtv
->last_valid_pts
== AV_NOPTS_VALUE
|| ts
< wtv
->last_valid_pts
) {
1086 if (avio_seek(pb
, 0, SEEK_SET
) < 0)
1088 } else if (st
->duration
!= AV_NOPTS_VALUE
&& ts_relative
> st
->duration
&& wtv
->nb_index_entries
) {
1089 if (avio_seek(pb
, wtv
->index_entries
[wtv
->nb_index_entries
- 1].pos
, SEEK_SET
) < 0)
1092 if (parse_chunks(s
, SEEK_TO_PTS
, ts
, 0) < 0)
1093 return AVERROR(ERANGE
);
1096 if (avio_seek(pb
, wtv
->index_entries
[i
].pos
, SEEK_SET
) < 0)
1098 wtv
->pts
= wtv
->index_entries
[i
].timestamp
;
1099 if (wtv
->epoch
!= AV_NOPTS_VALUE
)
1100 wtv
->pts
+= wtv
->epoch
;
1101 wtv
->last_valid_pts
= wtv
->pts
;
1105 static int read_close(AVFormatContext
*s
)
1107 WtvContext
*wtv
= s
->priv_data
;
1108 av_freep(&wtv
->index_entries
);
1109 wtvfile_close(wtv
->pb
);
1113 AVInputFormat ff_wtv_demuxer
= {
1115 .long_name
= NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1116 .priv_data_size
= sizeof(WtvContext
),
1117 .read_probe
= read_probe
,
1118 .read_header
= read_header
,
1119 .read_packet
= read_packet
,
1120 .read_seek
= read_seek
,
1121 .read_close
= read_close
,
1122 .flags
= AVFMT_SHOW_IDS
,