2
* Windows Television (WTV) demuxer
3
* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
5
* This file is part of Libav.
7
* Libav 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
* Libav 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 Libav; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24
* Windows Television (WTV) demuxer
25
* @author Peter Ross <pross@xvid.org>
28
#include "libavutil/intreadwrite.h"
29
#include "libavutil/intfloat_readwrite.h"
37
/* Macros for formating GUIDs */
39
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
41
g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
43
#define PRI_PRETTY_GUID \
44
"%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
45
#define ARG_PRETTY_GUID(g) \
46
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]
47
#define LEN_PRETTY_GUID 34
51
* File system routines
55
#define WTV_SECTOR_BITS 12
56
#define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS)
57
#define WTV_BIGSECTOR_BITS 18
60
AVIOContext *pb_filesystem; /** file system (AVFormatContext->pb) */
62
int sector_bits; /** sector shift bits; used to convert sector number into pb_filesystem offset */
63
uint32_t *sectors; /** file allocation table */
64
int nb_sectors; /** number of sectors */
72
* @return bytes read, 0 on end of file, or <0 on error
74
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
77
AVIOContext *pb = wf->pb_filesystem;
80
if (wf->error || pb->error)
82
if (wf->position >= wf->length || pb->eof_reached)
85
buf_size = FFMIN(buf_size, wf->length - wf->position);
86
while(nread < buf_size) {
88
int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
89
int read_request = FFMIN(buf_size - nread, remaining_in_sector);
91
n = avio_read(pb, buf, read_request);
97
if (n == remaining_in_sector) {
98
int i = wf->position >> wf->sector_bits;
99
if (i >= wf->nb_sectors ||
100
(wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
101
avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
111
* @return position (or file length)
113
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
115
WtvFile *wf = opaque;
116
AVIOContext *pb = wf->pb_filesystem;
118
if (whence == AVSEEK_SIZE)
120
else if (whence == SEEK_CUR)
121
offset = wf->position + offset;
122
else if (whence == SEEK_END)
125
wf->error = offset < 0 || offset >= wf->length ||
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avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
127
+ (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0;
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wf->position = offset;
133
* read non-zero integers (le32) from input stream
135
* @param[out] data destination
136
* @param count maximum number of integers to read
137
* @return total number of integers read
139
static int read_ints(AVIOContext *pb, uint32_t *data, int count)
142
for (i = 0; i < count; i++) {
143
if ((data[total] = avio_rl32(pb)))
151
* @param first_sector First sector
152
* @param length Length of file (bytes)
153
* @param depth File allocation table depth
154
* @return NULL on error
156
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s)
162
if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
165
wf = av_mallocz(sizeof(WtvFile));
170
wf->sectors = av_malloc(sizeof(uint32_t));
175
wf->sectors[0] = first_sector;
177
wf->sector_bits = WTV_SECTOR_BITS;
178
} else if (depth == 1) {
179
wf->sectors = av_malloc(WTV_SECTOR_SIZE);
184
wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
186
} else if (depth == 2) {
187
uint32_t sectors1[WTV_SECTOR_SIZE / 4];
188
int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
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wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS);
197
for (i = 0; i < nb_sectors1; i++) {
198
if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
200
wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
202
wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
204
av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
209
if (!wf->nb_sectors) {
210
av_free(wf->sectors);
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 intial sector */
225
if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 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);
249
static const ff_asf_guid dir_entry_guid =
250
{0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
253
* Open file using filename
254
* @param[in] buf directory buffer
255
* @param buf_size directory buffer size
256
* @param[in] filename
257
* @param filename_size size of filename
258
* @return NULL on error
260
static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
262
const uint8_t *buf_end = buf + buf_size;
264
while(buf + 48 <= buf_end) {
265
int dir_length, name_size, first_sector, depth;
266
uint64_t file_length;
268
if (ff_guidcmp(buf, dir_entry_guid)) {
269
av_log(s, AV_LOG_ERROR, "unknown guid "PRI_GUID", expected dir_entry_guid; "
270
"remaining directory entries ignored\n", ARG_GUID(buf));
273
dir_length = AV_RL16(buf + 16);
274
file_length = AV_RL64(buf + 24);
275
name_size = 2 * AV_RL32(buf + 32);
276
if (buf + 48 + name_size > buf_end) {
277
av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
280
first_sector = AV_RL32(buf + 40 + name_size);
281
depth = AV_RL32(buf + 44 + name_size);
283
/* compare file name; test optional null terminator */
285
if (name_size >= filename_size &&
286
!memcmp(name, filename, filename_size) &&
287
(name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
288
return wtvfile_open_sector(first_sector, file_length, depth, s);
295
#define wtvfile_open(s, buf, buf_size, filename) \
296
wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
299
* Close file opened with wtvfile_open_sector(), or wtv_open()
301
static void wtvfile_close(AVIOContext *pb)
303
WtvFile *wf = pb->opaque;
304
av_free(wf->sectors);
319
AVIOContext *pb; /** timeline file */
321
int64_t pts; /** pts for next data chunk */
322
int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
324
/* maintain private seek index, as the AVIndexEntry->pos is relative to the
325
start of the 'timeline' file, not the file system (AVFormatContext->pb) */
326
AVIndexEntry *index_entries;
327
int nb_index_entries;
328
unsigned int index_entries_allocated_size;
336
static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
339
for (i = 0; guids[i].id != CODEC_ID_NONE; i++) {
340
if (!ff_guidcmp(guids[i].guid, guid))
343
return CODEC_ID_NONE;
347
static const ff_asf_guid wtv_guid =
348
{0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
349
static const ff_asf_guid metadata_guid =
350
{0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
351
static const ff_asf_guid timestamp_guid =
352
{0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
353
static const ff_asf_guid data_guid =
354
{0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
355
static const ff_asf_guid stream_guid =
356
{0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
357
static const ff_asf_guid stream2_guid =
358
{0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
359
static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
360
{0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
361
static const ff_asf_guid EVENTID_LanguageSpanningEvent =
362
{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
363
static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
364
{0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
365
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
366
{0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
367
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
368
{0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
369
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
370
{0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
371
static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
372
{0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
373
static const ff_asf_guid EVENTID_TeletextSpanningEvent =
374
{0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
375
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
376
{0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
378
/* Windows media GUIDs */
380
#define MEDIASUBTYPE_BASE_GUID \
381
0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
384
static const ff_asf_guid mediatype_audio =
385
{'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
386
static const ff_asf_guid mediatype_video =
387
{'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
388
static const ff_asf_guid mediasubtype_mpeg1payload =
389
{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
390
static const ff_asf_guid mediatype_mpeg2_sections =
391
{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
392
static const ff_asf_guid mediatype_mpeg2_pes =
393
{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
394
static const ff_asf_guid mediatype_mstvcaption =
395
{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
398
static const ff_asf_guid mediasubtype_cpfilters_processed =
399
{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
400
static const ff_asf_guid mediasubtype_dvb_subtitle =
401
{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
402
static const ff_asf_guid mediasubtype_teletext =
403
{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
404
static const ff_asf_guid mediasubtype_dtvccdata =
405
{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
406
static const ff_asf_guid mediasubtype_mpeg2_sections =
407
{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
410
static const ff_asf_guid format_cpfilters_processed =
411
{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
412
static const ff_asf_guid format_waveformatex =
413
{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
414
static const ff_asf_guid format_videoinfo2 =
415
{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
416
static const ff_asf_guid format_mpeg2_video =
417
{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
418
static const ff_asf_guid format_none =
419
{0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
421
static const AVCodecGuid video_guids[] = {
422
{CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
426
static const AVCodecGuid audio_guids[] = {
427
{CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
428
{CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
429
{CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
433
static int read_probe(AVProbeData *p)
435
return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
439
* Convert win32 FILETIME to ISO-8601 string
441
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value)
443
time_t t = (value / 10000000LL) - 11644473600LL;
444
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
448
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
450
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
452
time_t t = (value / 10000000LL) - 719162LL*86400LL;
453
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
457
* Convert OLE DATE to ISO-8601 string
459
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
461
time_t t = 631112400LL + 86400*av_int2dbl(value);
462
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
465
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
468
char description[1024];
469
unsigned int filesize;
471
int64_t pos = avio_tell(pb);
473
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
474
if (strcmp(mime, "image/jpeg"))
478
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
479
filesize = avio_rl32(pb);
483
st = av_new_stream(s, 0);
486
av_metadata_set2(&st->metadata, "title", description, 0);
487
st->codec->codec_id = CODEC_ID_MJPEG;
488
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
489
st->codec->extradata = av_mallocz(filesize);
490
if (!st->codec->extradata)
492
st->codec->extradata_size = filesize;
493
avio_read(pb, st->codec->extradata, filesize);
495
avio_seek(pb, pos + length, SEEK_SET);
498
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
500
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
501
char *buf = av_malloc(buf_size);
505
if (type == 0 && length == 4) {
506
snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
507
} else if (type == 1) {
508
avio_get_str16le(pb, length, buf, buf_size);
513
} else if (type == 3 && length == 4) {
514
strcpy(buf, avio_rl32(pb) ? "true" : "false");
515
} else if (type == 4 && length == 8) {
516
int64_t num = avio_rl64(pb);
517
if (!strcmp(key, "WM/EncodingTime") ||
518
!strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
519
filetime_to_iso8601(buf, buf_size, num);
520
else if (!strcmp(key, "WM/WMRVEncodeTime") ||
521
!strcmp(key, "WM/WMRVEndTime"))
522
crazytime_to_iso8601(buf, buf_size, num);
523
else if (!strcmp(key, "WM/WMRVExpirationDate"))
524
oledate_to_iso8601(buf, buf_size, num);
525
else if (!strcmp(key, "WM/WMRVBitrate"))
526
snprintf(buf, buf_size, "%f", av_int2dbl(num));
528
snprintf(buf, buf_size, "%"PRIi64, num);
529
} else if (type == 5 && length == 2) {
530
snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
531
} else if (type == 6 && length == 16) {
533
avio_read(pb, guid, 16);
534
snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
535
} else if (type == 2 && !strcmp(key, "WM/Picture")) {
536
get_attachment(s, pb, length);
541
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
542
avio_skip(pb, length);
546
av_metadata_set2(&s->metadata, key, buf, 0);
551
* Parse metadata entries
553
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
557
while(!pb->eof_reached) {
559
ff_get_guid(pb, &guid);
560
type = avio_rl32(pb);
561
length = avio_rl32(pb);
564
if (ff_guidcmp(&guid, metadata_guid)) {
565
av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; "
566
"remaining metadata entries ignored\n", ARG_GUID(guid));
569
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
570
get_tag(s, pb, key, type, length);
573
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
577
* parse VIDEOINFOHEADER2 structure
578
* @return bytes consumed
580
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
582
WtvContext *wtv = s->priv_data;
583
AVIOContext *pb = wtv->pb;
585
avio_skip(pb, 72); // picture aspect ratio is unreliable
586
ff_get_bmp_header(pb, st);
592
* Parse MPEG1WAVEFORMATEX extradata structure
594
static void parse_mpeg1waveformatex(AVStream *st)
597
switch (AV_RL16(st->codec->extradata)) {
598
case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
599
case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
600
case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
603
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
606
switch (AV_RL16(st->codec->extradata + 6)) {
607
case 1 : case 2 : case 4 : st->codec->channels = 2; break;
608
case 8 : st->codec->channels = 1; break;
614
* @param st Stream to initialise, or NULL to create and initialise new stream
615
* @return NULL on error
617
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
620
if (st->codec->extradata) {
621
av_freep(&st->codec->extradata);
622
st->codec->extradata_size = 0;
625
WtvStream *wst = av_mallocz(sizeof(WtvStream));
628
st = av_new_stream(s, sid);
633
st->codec->codec_type = codec_type;
634
st->need_parsing = AVSTREAM_PARSE_FULL;
635
av_set_pts_info(st, 64, 1, 10000000);
640
* parse Media Type structure and populate stream
641
* @param st Stream, or NULL to create new stream
642
* @param mediatype Mediatype GUID
643
* @param subtype Subtype GUID
644
* @param formattype Format GUID
645
* @param size Size of format buffer
646
* @return NULL on error
648
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
649
ff_asf_guid mediatype, ff_asf_guid subtype,
650
ff_asf_guid formattype, int size)
652
WtvContext *wtv = s->priv_data;
653
AVIOContext *pb = wtv->pb;
654
if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
655
!ff_guidcmp(formattype, format_cpfilters_processed)) {
656
ff_asf_guid actual_subtype;
657
ff_asf_guid actual_formattype;
660
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
665
avio_skip(pb, size - 32);
666
ff_get_guid(pb, &actual_subtype);
667
ff_get_guid(pb, &actual_formattype);
668
avio_seek(pb, -size, SEEK_CUR);
670
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
673
} else if (!ff_guidcmp(mediatype, mediatype_audio)) {
674
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
677
if (!ff_guidcmp(formattype, format_waveformatex)) {
678
int ret = ff_get_wav_header(pb, st->codec, size);
682
if (ff_guidcmp(formattype, format_none))
683
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
687
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
688
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
689
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
690
if (st->codec->extradata && st->codec->extradata_size >= 22)
691
parse_mpeg1waveformatex(st);
693
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
695
st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
696
if (st->codec->codec_id == CODEC_ID_NONE)
697
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
700
} else if (!ff_guidcmp(mediatype, mediatype_video)) {
701
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
704
if (!ff_guidcmp(formattype, format_videoinfo2)) {
705
int consumed = parse_videoinfoheader2(s, st);
706
avio_skip(pb, FFMAX(size - consumed, 0));
707
} else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
708
int consumed = parse_videoinfoheader2(s, st);
709
avio_skip(pb, FFMAX(size - consumed, 0));
711
if (ff_guidcmp(formattype, format_none))
712
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
716
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
717
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
719
st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
721
if (st->codec->codec_id == CODEC_ID_NONE)
722
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
724
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
725
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
726
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
729
if (ff_guidcmp(formattype, format_none))
730
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
732
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
734
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
735
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
736
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
739
if (ff_guidcmp(formattype, format_none))
740
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
742
st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
744
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
745
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
746
if (ff_guidcmp(formattype, format_none))
747
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
752
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
753
", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
754
ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
766
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
767
* @param seekts timestamp
768
* @param[out] len Length of data chunk
769
* @return stream index of data chunk, or <0 on error
771
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
773
WtvContext *wtv = s->priv_data;
774
AVIOContext *pb = wtv->pb;
775
while (!pb->eof_reached) {
777
int len, sid, consumed;
783
sid = avio_rl32(pb) & 0x7FFF;
787
if (!ff_guidcmp(g, stream_guid)) {
788
if (ff_find_stream_index(s, sid) < 0) {
789
ff_asf_guid mediatype, subtype, formattype;
792
ff_get_guid(pb, &mediatype);
793
ff_get_guid(pb, &subtype);
795
ff_get_guid(pb, &formattype);
796
size = avio_rl32(pb);
797
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
798
consumed += 92 + size;
800
} else if (!ff_guidcmp(g, stream2_guid)) {
801
int stream_index = ff_find_stream_index(s, sid);
802
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
803
ff_asf_guid mediatype, subtype, formattype;
806
ff_get_guid(pb, &mediatype);
807
ff_get_guid(pb, &subtype);
809
ff_get_guid(pb, &formattype);
810
size = avio_rl32(pb);
811
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
812
consumed += 76 + size;
814
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
815
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
816
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
817
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
818
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
819
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
820
int stream_index = ff_find_stream_index(s, sid);
821
if (stream_index >= 0) {
822
AVStream *st = s->streams[stream_index];
824
const uint8_t *pbuf = buf;
829
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
830
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
835
buf_size = FFMIN(len - consumed, sizeof(buf));
836
avio_read(pb, buf, buf_size);
837
consumed += buf_size;
838
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0);
840
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
841
int stream_index = ff_find_stream_index(s, sid);
842
if (stream_index >= 0) {
843
AVStream *st = s->streams[stream_index];
846
audio_type = avio_r8(pb);
848
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
849
else if (audio_type == 3)
850
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
853
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
854
int stream_index = ff_find_stream_index(s, sid);
855
if (stream_index >= 0) {
858
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
861
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
862
int stream_index = ff_find_stream_index(s, sid);
863
if (stream_index >= 0) {
864
AVStream *st = s->streams[stream_index];
867
avio_read(pb, language, 3);
870
av_metadata_set2(&st->metadata, "language", language, 0);
871
if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
872
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
876
} else if (!ff_guidcmp(g, timestamp_guid)) {
877
int stream_index = ff_find_stream_index(s, sid);
878
if (stream_index >= 0) {
880
wtv->pts = avio_rl64(pb);
883
wtv->pts = AV_NOPTS_VALUE;
885
wtv->last_valid_pts = wtv->pts;
886
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
887
wtv->epoch = wtv->pts;
888
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
889
#define WTV_PAD8(x) (((x) + 7) & ~7)
890
avio_skip(pb, WTV_PAD8(len) - consumed);
895
} else if (!ff_guidcmp(g, data_guid)) {
896
int stream_index = ff_find_stream_index(s, sid);
897
if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) {
898
WtvStream *wst = s->streams[stream_index]->priv_data;
906
!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}) ||
907
!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}) ||
908
!ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
909
!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}) ||
910
!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}) ||
911
!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}) ||
912
!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}) ||
913
!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}) ||
914
!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}) ||
915
!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}) ||
916
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
917
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
918
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
919
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
920
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
921
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
922
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
923
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
926
av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
928
avio_skip(pb, WTV_PAD8(len) - consumed);
933
/* declare utf16le strings */
935
static const uint8_t timeline_le16[] =
936
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
937
static const uint8_t table_0_entries_legacy_attrib_le16[] =
938
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
939
static const uint8_t table_0_entries_time_le16[] =
940
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
941
static const uint8_t timeline_table_0_entries_Events_le16[] =
942
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0};
945
static int read_header(AVFormatContext *s, AVFormatParameters *ap)
947
WtvContext *wtv = s->priv_data;
948
int root_sector, root_size;
949
uint8_t root[WTV_SECTOR_SIZE];
951
int64_t timeline_pos;
956
wtv->last_valid_pts = AV_NOPTS_VALUE;
958
/* read root directory sector */
959
avio_skip(s->pb, 0x30);
960
root_size = avio_rl32(s->pb);
961
if (root_size > sizeof(root)) {
962
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
963
return AVERROR_INVALIDDATA;
966
root_sector = avio_rl32(s->pb);
968
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
969
root_size = avio_read(s->pb, root, root_size);
971
return AVERROR_INVALIDDATA;
973
/* parse chunks up until first data chunk */
974
wtv->pb = wtvfile_open(s, root, root_size, timeline_le16);
976
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
977
return AVERROR_INVALIDDATA;
980
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
983
avio_seek(wtv->pb, -32, SEEK_CUR);
985
timeline_pos = avio_tell(s->pb); // save before opening another file
988
pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16);
990
parse_legacy_attrib(s, pb);
994
/* read seek index */
996
AVStream *st = s->streams[0];
997
pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16);
1000
uint64_t timestamp = avio_rl64(pb);
1001
uint64_t frame_nb = avio_rl64(pb);
1002
if (pb->eof_reached)
1004
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
1005
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1009
if (wtv->nb_index_entries) {
1010
pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16);
1014
uint64_t frame_nb = avio_rl64(pb);
1015
uint64_t position = avio_rl64(pb);
1016
if (pb->eof_reached)
1018
for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
1019
AVIndexEntry *e = wtv->index_entries + i;
1020
if (frame_nb > e->size)
1022
if (position > e->pos)
1027
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
1033
avio_seek(s->pb, timeline_pos, SEEK_SET);
1037
static int read_packet(AVFormatContext *s, AVPacket *pkt)
1039
WtvContext *wtv = s->priv_data;
1040
AVIOContext *pb = wtv->pb;
1041
int stream_index, len, ret;
1043
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1044
if (stream_index < 0)
1045
return stream_index;
1047
ret = av_get_packet(pb, pkt, len - 32);
1050
pkt->stream_index = stream_index;
1051
pkt->pts = wtv->pts;
1052
avio_skip(pb, WTV_PAD8(len) - len);
1056
static int read_seek(AVFormatContext *s, int stream_index,
1057
int64_t ts, int flags)
1059
WtvContext *wtv = s->priv_data;
1060
AVIOContext *pb = wtv->pb;
1061
AVStream *st = s->streams[0];
1062
int64_t ts_relative;
1065
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1066
return AVERROR(ENOSYS);
1068
/* timestamp adjustment is required because wtv->pts values are absolute,
1069
* whereas AVIndexEntry->timestamp values are relative to epoch. */
1071
if (wtv->epoch != AV_NOPTS_VALUE)
1072
ts_relative -= wtv->epoch;
1074
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1076
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
1077
avio_seek(pb, 0, SEEK_SET);
1078
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
1079
avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
1080
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1081
return AVERROR(ERANGE);
1084
wtv->pts = wtv->index_entries[i].timestamp;
1085
if (wtv->epoch != AV_NOPTS_VALUE)
1086
wtv->pts += wtv->epoch;
1087
wtv->last_valid_pts = wtv->pts;
1088
avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
1092
static int read_close(AVFormatContext *s)
1094
WtvContext *wtv = s->priv_data;
1095
wtvfile_close(wtv->pb);
1099
AVInputFormat ff_wtv_demuxer = {
1101
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1102
.priv_data_size = sizeof(WtvContext),
1103
.read_probe = read_probe,
1104
.read_header = read_header,
1105
.read_packet = read_packet,
1106
.read_seek = read_seek,
1107
.read_close = read_close,
1108
.flags = AVFMT_SHOW_IDS,