ffmpeg / libavformat / wtv.c @ 66e5b1df
History | View | Annotate | Download (41.5 KB)
1 |
/*
|
---|---|
2 |
* Windows Television (WTV) demuxer
|
3 |
* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
|
4 |
*
|
5 |
* This file is part of FFmpeg.
|
6 |
*
|
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.
|
11 |
*
|
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.
|
16 |
*
|
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
|
20 |
*/
|
21 |
|
22 |
/**
|
23 |
* @file
|
24 |
* Windows Television (WTV) demuxer
|
25 |
* @author Peter Ross <pross@xvid.org>
|
26 |
*/
|
27 |
|
28 |
#include "libavutil/intreadwrite.h" |
29 |
#include "libavutil/intfloat_readwrite.h" |
30 |
#include "avformat.h" |
31 |
#include "internal.h" |
32 |
#include "riff.h" |
33 |
#include "asf.h" |
34 |
#include "mpegts.h" |
35 |
#include <strings.h> |
36 |
|
37 |
/* Macros for formating GUIDs */
|
38 |
#define PRI_GUID \
|
39 |
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
|
40 |
#define ARG_GUID(g) \
|
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] |
42 |
|
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 |
48 |
|
49 |
/*
|
50 |
*
|
51 |
* File system routines
|
52 |
*
|
53 |
*/
|
54 |
|
55 |
#define WTV_SECTOR_BITS 12 |
56 |
#define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS) |
57 |
#define WTV_BIGSECTOR_BITS 18 |
58 |
|
59 |
typedef struct { |
60 |
AVIOContext *pb_filesystem; /** file system (AVFormatContext->pb) */
|
61 |
|
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 */ |
65 |
|
66 |
int error;
|
67 |
int64_t position; |
68 |
int64_t length; |
69 |
} WtvFile; |
70 |
|
71 |
/**
|
72 |
* @return bytes read, 0 on end of file, or <0 on error
|
73 |
*/
|
74 |
static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size) |
75 |
{ |
76 |
WtvFile *wf = opaque; |
77 |
AVIOContext *pb = wf->pb_filesystem; |
78 |
int nread = 0; |
79 |
|
80 |
if (wf->error || url_ferror(pb))
|
81 |
return -1; |
82 |
if (wf->position >= wf->length || pb->eof_reached)
|
83 |
return 0; |
84 |
|
85 |
buf_size = FFMIN(buf_size, wf->length - wf->position); |
86 |
while(nread < buf_size) {
|
87 |
int n;
|
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);
|
90 |
|
91 |
n = avio_read(pb, buf, read_request); |
92 |
if (n <= 0) |
93 |
break;
|
94 |
nread += n; |
95 |
buf += n; |
96 |
wf->position += n; |
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)) {
|
102 |
wf->error = 1;
|
103 |
break;
|
104 |
} |
105 |
} |
106 |
} |
107 |
return nread;
|
108 |
} |
109 |
|
110 |
/**
|
111 |
* @return position (or file length)
|
112 |
*/
|
113 |
static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence) |
114 |
{ |
115 |
WtvFile *wf = opaque; |
116 |
AVIOContext *pb = wf->pb_filesystem; |
117 |
|
118 |
if (whence == AVSEEK_SIZE)
|
119 |
return wf->length;
|
120 |
else if (whence == SEEK_CUR) |
121 |
offset = wf->position + offset; |
122 |
else if (whence == SEEK_END) |
123 |
offset = wf->length; |
124 |
|
125 |
wf->error = offset < 0 || offset >= wf->length ||
|
126 |
avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS) |
127 |
+ (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0; |
128 |
wf->position = offset; |
129 |
return offset;
|
130 |
} |
131 |
|
132 |
/**
|
133 |
* read non-zero integers (le32) from input stream
|
134 |
* @param pb
|
135 |
* @param[out] data destination
|
136 |
* @param count maximum number of integers to read
|
137 |
* @return total number of integers read
|
138 |
*/
|
139 |
static int read_ints(AVIOContext *pb, uint32_t *data, int count) |
140 |
{ |
141 |
int i, total = 0; |
142 |
for (i = 0; i < count; i++) { |
143 |
if ((data[total] = avio_rl32(pb)))
|
144 |
total++; |
145 |
} |
146 |
return total;
|
147 |
} |
148 |
|
149 |
/**
|
150 |
* Open file
|
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
|
155 |
*/
|
156 |
static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) |
157 |
{ |
158 |
AVIOContext *pb; |
159 |
WtvFile *wf; |
160 |
uint8_t *buffer; |
161 |
|
162 |
if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0) |
163 |
return NULL; |
164 |
|
165 |
wf = av_mallocz(sizeof(WtvFile));
|
166 |
if (!wf)
|
167 |
return NULL; |
168 |
|
169 |
if (depth == 0) { |
170 |
wf->sectors = av_malloc(sizeof(uint32_t));
|
171 |
if (!wf->sectors) {
|
172 |
av_free(wf); |
173 |
return NULL; |
174 |
} |
175 |
wf->sectors[0] = first_sector;
|
176 |
wf->nb_sectors = 1;
|
177 |
wf->sector_bits = WTV_SECTOR_BITS; |
178 |
} else if (depth == 1) { |
179 |
wf->sectors = av_malloc(WTV_SECTOR_SIZE); |
180 |
if (!wf->sectors) {
|
181 |
av_free(wf); |
182 |
return NULL; |
183 |
} |
184 |
wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
|
185 |
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); |
189 |
int i;
|
190 |
|
191 |
wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS); |
192 |
if (!wf->sectors) {
|
193 |
av_free(wf); |
194 |
return NULL; |
195 |
} |
196 |
wf->nb_sectors = 0;
|
197 |
for (i = 0; i < nb_sectors1; i++) { |
198 |
if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0) |
199 |
break;
|
200 |
wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); |
201 |
} |
202 |
wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
203 |
} else {
|
204 |
av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
|
205 |
av_free(wf); |
206 |
return NULL; |
207 |
} |
208 |
|
209 |
if (!wf->nb_sectors) {
|
210 |
av_free(wf->sectors); |
211 |
av_free(wf); |
212 |
return NULL; |
213 |
} |
214 |
|
215 |
/* check length */
|
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; |
220 |
} |
221 |
wf->length = length; |
222 |
|
223 |
/* seek to intial sector */
|
224 |
wf->position = 0;
|
225 |
if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) { |
226 |
av_free(wf->sectors); |
227 |
av_free(wf); |
228 |
return NULL; |
229 |
} |
230 |
|
231 |
wf->pb_filesystem = s->pb; |
232 |
buffer = av_malloc(1 << wf->sector_bits);
|
233 |
if (!buffer) {
|
234 |
av_free(wf->sectors); |
235 |
av_free(wf); |
236 |
return NULL; |
237 |
} |
238 |
|
239 |
pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, |
240 |
wtvfile_read_packet, NULL, wtvfile_seek);
|
241 |
if (!pb) {
|
242 |
av_free(buffer); |
243 |
av_free(wf->sectors); |
244 |
av_free(wf); |
245 |
} |
246 |
return pb;
|
247 |
} |
248 |
|
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}; |
251 |
|
252 |
/**
|
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
|
259 |
*/
|
260 |
static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) |
261 |
{ |
262 |
const uint8_t *buf_end = buf + buf_size;
|
263 |
|
264 |
while(buf + 48 <= buf_end) { |
265 |
int dir_length, name_size, first_sector, depth;
|
266 |
uint64_t file_length; |
267 |
const uint8_t *name;
|
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));
|
271 |
break;
|
272 |
} |
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");
|
278 |
break;
|
279 |
} |
280 |
first_sector = AV_RL32(buf + 40 + name_size);
|
281 |
depth = AV_RL32(buf + 44 + name_size);
|
282 |
|
283 |
/* compare file name; test optional null terminator */
|
284 |
name = buf + 40;
|
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);
|
289 |
|
290 |
buf += dir_length; |
291 |
} |
292 |
return 0; |
293 |
} |
294 |
|
295 |
#define wtvfile_open(s, buf, buf_size, filename) \
|
296 |
wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
|
297 |
|
298 |
/**
|
299 |
* Close file opened with wtvfile_open_sector(), or wtv_open()
|
300 |
*/
|
301 |
static void wtvfile_close(AVIOContext *pb) |
302 |
{ |
303 |
WtvFile *wf = pb->opaque; |
304 |
av_free(wf->sectors); |
305 |
av_free(pb); |
306 |
} |
307 |
|
308 |
/*
|
309 |
*
|
310 |
* Main demuxer
|
311 |
*
|
312 |
*/
|
313 |
|
314 |
typedef struct { |
315 |
int seen_data;
|
316 |
} WtvStream; |
317 |
|
318 |
typedef struct { |
319 |
AVIOContext *pb; /** timeline file */
|
320 |
int64_t epoch; |
321 |
int64_t pts; /** pts for next data chunk */
|
322 |
int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
|
323 |
|
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; |
329 |
} WtvContext; |
330 |
|
331 |
typedef struct { |
332 |
enum CodecID id;
|
333 |
ff_asf_guid guid; |
334 |
} AVCodecGuid; |
335 |
|
336 |
static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid) |
337 |
{ |
338 |
int i;
|
339 |
for (i = 0; guids[i].id != CODEC_ID_NONE; i++) { |
340 |
if (!ff_guidcmp(guids[i].guid, guid))
|
341 |
return guids[i].id;
|
342 |
} |
343 |
return CODEC_ID_NONE;
|
344 |
} |
345 |
|
346 |
/* WTV GUIDs */
|
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}; |
377 |
|
378 |
/* Windows media GUIDs */
|
379 |
|
380 |
#define MEDIASUBTYPE_BASE_GUID \
|
381 |
0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71 |
382 |
|
383 |
/* Media types */
|
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}; |
396 |
|
397 |
/* Media subtypes */
|
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}; |
408 |
|
409 |
/* Formats */
|
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}; |
420 |
|
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}}, |
423 |
{CODEC_ID_NONE} |
424 |
}; |
425 |
|
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}}, |
430 |
{CODEC_ID_NONE} |
431 |
}; |
432 |
|
433 |
static int read_probe(AVProbeData *p) |
434 |
{ |
435 |
return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
436 |
} |
437 |
|
438 |
/**
|
439 |
* Convert win32 FILETIME to ISO-8601 string
|
440 |
*/
|
441 |
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
442 |
{ |
443 |
time_t t = (value / 10000000LL) - 11644473600LL; |
444 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
445 |
} |
446 |
|
447 |
/**
|
448 |
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
|
449 |
*/
|
450 |
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
451 |
{ |
452 |
time_t t = (value / 10000000LL) - 719162LL*86400LL; |
453 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
454 |
} |
455 |
|
456 |
/**
|
457 |
* Convert OLE DATE to ISO-8601 string
|
458 |
*/
|
459 |
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
460 |
{ |
461 |
time_t t = 631112400LL + 86400*av_int2dbl(value); |
462 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
463 |
} |
464 |
|
465 |
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
466 |
{ |
467 |
char mime[1024]; |
468 |
char description[1024]; |
469 |
unsigned int filesize; |
470 |
AVStream *st; |
471 |
int64_t pos = avio_tell(pb); |
472 |
|
473 |
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
|
474 |
if (strcmp(mime, "image/jpeg")) |
475 |
goto done;
|
476 |
|
477 |
avio_r8(pb); |
478 |
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
|
479 |
filesize = avio_rl32(pb); |
480 |
if (!filesize)
|
481 |
goto done;
|
482 |
|
483 |
st = av_new_stream(s, 0);
|
484 |
if (!st)
|
485 |
goto done;
|
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)
|
491 |
goto done;
|
492 |
st->codec->extradata_size = filesize; |
493 |
avio_read(pb, st->codec->extradata, filesize); |
494 |
done:
|
495 |
avio_seek(pb, pos + length, SEEK_SET); |
496 |
} |
497 |
|
498 |
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) |
499 |
{ |
500 |
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
501 |
char *buf = av_malloc(buf_size);
|
502 |
if (!buf)
|
503 |
return;
|
504 |
|
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); |
509 |
if (!strlen(buf)) {
|
510 |
av_free(buf); |
511 |
return;
|
512 |
} |
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));
|
527 |
else
|
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) { |
532 |
ff_asf_guid guid; |
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); |
537 |
av_freep(&buf); |
538 |
return;
|
539 |
} else {
|
540 |
av_freep(&buf); |
541 |
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
|
542 |
avio_seek(pb, length, SEEK_CUR); |
543 |
return;
|
544 |
} |
545 |
|
546 |
av_metadata_set2(&s->metadata, key, buf, 0);
|
547 |
av_freep(&buf); |
548 |
} |
549 |
|
550 |
/**
|
551 |
* Parse metadata entries
|
552 |
*/
|
553 |
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) |
554 |
{ |
555 |
ff_asf_guid guid; |
556 |
int length, type;
|
557 |
while(!pb->eof_reached) {
|
558 |
char key[1024]; |
559 |
ff_get_guid(pb, &guid); |
560 |
type = avio_rl32(pb); |
561 |
length = avio_rl32(pb); |
562 |
if (!length)
|
563 |
break;
|
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));
|
567 |
break;
|
568 |
} |
569 |
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
|
570 |
get_tag(s, pb, key, type, length); |
571 |
} |
572 |
|
573 |
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
574 |
} |
575 |
|
576 |
/**
|
577 |
* parse VIDEOINFOHEADER2 structure
|
578 |
* @return bytes consumed
|
579 |
*/
|
580 |
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
581 |
{ |
582 |
WtvContext *wtv = s->priv_data; |
583 |
AVIOContext *pb = wtv->pb; |
584 |
|
585 |
avio_seek(pb, 72, SEEK_CUR); // picture aspect ratio is unreliable |
586 |
ff_get_bmp_header(pb, st); |
587 |
|
588 |
return 72 + 40; |
589 |
} |
590 |
|
591 |
/**
|
592 |
* Parse MPEG1WAVEFORMATEX extradata structure
|
593 |
*/
|
594 |
static void parse_mpeg1waveformatex(AVStream *st) |
595 |
{ |
596 |
/* fwHeadLayer */
|
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; |
601 |
} |
602 |
|
603 |
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ |
604 |
|
605 |
/* dwHeadMode */
|
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; |
609 |
} |
610 |
} |
611 |
|
612 |
/**
|
613 |
* Initialise stream
|
614 |
* @param st Stream to initialise, or NULL to create and initialise new stream
|
615 |
* @return NULL on error
|
616 |
*/
|
617 |
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
618 |
{ |
619 |
if (st) {
|
620 |
if (st->codec->extradata) {
|
621 |
av_freep(&st->codec->extradata); |
622 |
st->codec->extradata_size = 0;
|
623 |
} |
624 |
} else {
|
625 |
WtvStream *wst = av_mallocz(sizeof(WtvStream));
|
626 |
if (!wst)
|
627 |
return NULL; |
628 |
st = av_new_stream(s, sid); |
629 |
if (!st)
|
630 |
return NULL; |
631 |
st->priv_data = wst; |
632 |
} |
633 |
st->codec->codec_type = codec_type; |
634 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
635 |
av_set_pts_info(st, 64, 1, 10000000); |
636 |
return st;
|
637 |
} |
638 |
|
639 |
/**
|
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
|
647 |
*/
|
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)
|
651 |
{ |
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; |
658 |
|
659 |
if (size < 32) { |
660 |
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
|
661 |
avio_seek(pb, size, SEEK_CUR); |
662 |
return NULL; |
663 |
} |
664 |
|
665 |
avio_seek(pb, size - 32, SEEK_CUR);
|
666 |
ff_get_guid(pb, &actual_subtype); |
667 |
ff_get_guid(pb, &actual_formattype); |
668 |
avio_seek(pb, -size, SEEK_CUR); |
669 |
|
670 |
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
|
671 |
avio_seek(pb, 32, SEEK_CUR);
|
672 |
return st;
|
673 |
} else if (!ff_guidcmp(mediatype, mediatype_audio)) { |
674 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
675 |
if (!st)
|
676 |
return NULL; |
677 |
if (!ff_guidcmp(formattype, format_waveformatex)) {
|
678 |
ff_get_wav_header(pb, st->codec, size); |
679 |
} else {
|
680 |
if (ff_guidcmp(formattype, format_none))
|
681 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
682 |
avio_seek(pb, size, SEEK_CUR); |
683 |
} |
684 |
|
685 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
686 |
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); |
687 |
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
688 |
if (st->codec->extradata && st->codec->extradata_size >= 22) |
689 |
parse_mpeg1waveformatex(st); |
690 |
else
|
691 |
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
|
692 |
} else {
|
693 |
st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype); |
694 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
695 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
696 |
} |
697 |
return st;
|
698 |
} else if (!ff_guidcmp(mediatype, mediatype_video)) { |
699 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
700 |
if (!st)
|
701 |
return NULL; |
702 |
if (!ff_guidcmp(formattype, format_videoinfo2)) {
|
703 |
int consumed = parse_videoinfoheader2(s, st);
|
704 |
avio_seek(pb, FFMAX(size - consumed, 0), SEEK_CUR);
|
705 |
} else if (!ff_guidcmp(formattype, format_mpeg2_video)) { |
706 |
int consumed = parse_videoinfoheader2(s, st);
|
707 |
avio_seek(pb, FFMAX(size - consumed, 0), SEEK_CUR);
|
708 |
} else {
|
709 |
if (ff_guidcmp(formattype, format_none))
|
710 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
711 |
avio_seek(pb, size, SEEK_CUR); |
712 |
} |
713 |
|
714 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
715 |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
716 |
} else {
|
717 |
st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype); |
718 |
} |
719 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
720 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
721 |
return st;
|
722 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
723 |
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { |
724 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
725 |
if (!st)
|
726 |
return NULL; |
727 |
if (ff_guidcmp(formattype, format_none))
|
728 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
729 |
avio_seek(pb, size, SEEK_CUR); |
730 |
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE; |
731 |
return st;
|
732 |
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
733 |
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { |
734 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
735 |
if (!st)
|
736 |
return NULL; |
737 |
if (ff_guidcmp(formattype, format_none))
|
738 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
739 |
avio_seek(pb, size, SEEK_CUR); |
740 |
st->codec->codec_id = CODEC_ID_DVB_TELETEXT; |
741 |
return st;
|
742 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
743 |
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { |
744 |
if (ff_guidcmp(formattype, format_none))
|
745 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
746 |
avio_seek(pb, size, SEEK_CUR); |
747 |
return NULL; |
748 |
} |
749 |
|
750 |
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
|
751 |
", subtype:"PRI_GUID", formattype:"PRI_GUID"\n", |
752 |
ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype)); |
753 |
avio_seek(pb, size, SEEK_CUR); |
754 |
return NULL; |
755 |
} |
756 |
|
757 |
enum {
|
758 |
SEEK_TO_DATA = 0,
|
759 |
SEEK_TO_PTS, |
760 |
}; |
761 |
|
762 |
/**
|
763 |
* Parse WTV chunks
|
764 |
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
|
765 |
* @param seekts timestamp
|
766 |
* @param[out] len Length of data chunk
|
767 |
* @return stream index of data chunk, or <0 on error
|
768 |
*/
|
769 |
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
770 |
{ |
771 |
WtvContext *wtv = s->priv_data; |
772 |
AVIOContext *pb = wtv->pb; |
773 |
while (!pb->eof_reached) {
|
774 |
ff_asf_guid g; |
775 |
int len, sid, consumed;
|
776 |
|
777 |
ff_get_guid(pb, &g); |
778 |
len = avio_rl32(pb); |
779 |
if (len < 32) |
780 |
break;
|
781 |
sid = avio_rl32(pb) & 0x7FFF;
|
782 |
avio_seek(pb, 8, SEEK_CUR);
|
783 |
consumed = 32;
|
784 |
|
785 |
if (!ff_guidcmp(g, stream_guid)) {
|
786 |
if (ff_find_stream_index(s, sid) < 0) { |
787 |
ff_asf_guid mediatype, subtype, formattype; |
788 |
int size;
|
789 |
avio_seek(pb, 28, SEEK_CUR);
|
790 |
ff_get_guid(pb, &mediatype); |
791 |
ff_get_guid(pb, &subtype); |
792 |
avio_seek(pb, 12, SEEK_CUR);
|
793 |
ff_get_guid(pb, &formattype); |
794 |
size = avio_rl32(pb); |
795 |
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
|
796 |
consumed += 92 + size;
|
797 |
} |
798 |
} else if (!ff_guidcmp(g, stream2_guid)) { |
799 |
int stream_index = ff_find_stream_index(s, sid);
|
800 |
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
801 |
ff_asf_guid mediatype, subtype, formattype; |
802 |
int size;
|
803 |
avio_seek(pb, 12, SEEK_CUR);
|
804 |
ff_get_guid(pb, &mediatype); |
805 |
ff_get_guid(pb, &subtype); |
806 |
avio_seek(pb, 12, SEEK_CUR);
|
807 |
ff_get_guid(pb, &formattype); |
808 |
size = avio_rl32(pb); |
809 |
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
810 |
consumed += 76 + size;
|
811 |
} |
812 |
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
813 |
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
814 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
815 |
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
816 |
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
817 |
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { |
818 |
int stream_index = ff_find_stream_index(s, sid);
|
819 |
if (stream_index >= 0) { |
820 |
AVStream *st = s->streams[stream_index]; |
821 |
uint8_t buf[258];
|
822 |
const uint8_t *pbuf = buf;
|
823 |
int buf_size;
|
824 |
|
825 |
avio_seek(pb, 8, SEEK_CUR);
|
826 |
consumed += 8;
|
827 |
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
828 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { |
829 |
avio_seek(pb, 6, SEEK_CUR);
|
830 |
consumed += 6;
|
831 |
} |
832 |
|
833 |
buf_size = FFMIN(len - consumed, sizeof(buf));
|
834 |
avio_read(pb, buf, buf_size); |
835 |
consumed += buf_size; |
836 |
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0); |
837 |
} |
838 |
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { |
839 |
int stream_index = ff_find_stream_index(s, sid);
|
840 |
if (stream_index >= 0) { |
841 |
AVStream *st = s->streams[stream_index]; |
842 |
int audio_type;
|
843 |
avio_seek(pb, 8, SEEK_CUR);
|
844 |
audio_type = avio_r8(pb); |
845 |
if (audio_type == 2) |
846 |
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
847 |
else if (audio_type == 3) |
848 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
849 |
consumed += 9;
|
850 |
} |
851 |
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
852 |
int stream_index = ff_find_stream_index(s, sid);
|
853 |
if (stream_index >= 0) { |
854 |
avio_seek(pb, 12, SEEK_CUR);
|
855 |
if (avio_rl32(pb))
|
856 |
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
|
857 |
consumed += 16;
|
858 |
} |
859 |
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
860 |
int stream_index = ff_find_stream_index(s, sid);
|
861 |
if (stream_index >= 0) { |
862 |
AVStream *st = s->streams[stream_index]; |
863 |
uint8_t language[4];
|
864 |
avio_seek(pb, 12, SEEK_CUR);
|
865 |
avio_read(pb, language, 3);
|
866 |
if (language[0]) { |
867 |
language[3] = 0; |
868 |
av_metadata_set2(&st->metadata, "language", language, 0); |
869 |
if (!strcmp(language, "nar") || !strcmp(language, "NAR")) |
870 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
871 |
} |
872 |
consumed += 15;
|
873 |
} |
874 |
} else if (!ff_guidcmp(g, timestamp_guid)) { |
875 |
int stream_index = ff_find_stream_index(s, sid);
|
876 |
if (stream_index >= 0) { |
877 |
avio_seek(pb, 8, SEEK_CUR);
|
878 |
wtv->pts = avio_rl64(pb); |
879 |
consumed += 16;
|
880 |
if (wtv->pts == -1) |
881 |
wtv->pts = AV_NOPTS_VALUE; |
882 |
else {
|
883 |
wtv->last_valid_pts = wtv->pts; |
884 |
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
|
885 |
wtv->epoch = wtv->pts; |
886 |
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
|
887 |
#define WTV_PAD8(x) (((x) + 7) & ~7) |
888 |
avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR); |
889 |
return 0; |
890 |
} |
891 |
} |
892 |
} |
893 |
} else if (!ff_guidcmp(g, data_guid)) { |
894 |
int stream_index = ff_find_stream_index(s, sid);
|
895 |
if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) { |
896 |
WtvStream *wst = s->streams[stream_index]->priv_data; |
897 |
wst->seen_data = 1;
|
898 |
if (len_ptr) {
|
899 |
*len_ptr = len; |
900 |
} |
901 |
return stream_index;
|
902 |
} |
903 |
} else if ( |
904 |
!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}) || |
905 |
!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}) || |
906 |
!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}) || |
907 |
!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}) || |
908 |
!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}) || |
909 |
!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}) || |
910 |
!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}) || |
911 |
!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}) || |
912 |
!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}) || |
913 |
!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}) || |
914 |
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
915 |
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
916 |
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
917 |
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
918 |
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
919 |
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
920 |
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
921 |
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { |
922 |
//ignore known guids
|
923 |
} else
|
924 |
av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g)); |
925 |
|
926 |
avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR); |
927 |
} |
928 |
return AVERROR_EOF;
|
929 |
} |
930 |
|
931 |
/* declare utf16le strings */
|
932 |
#define _ , 0, |
933 |
static const uint8_t timeline_le16[] = |
934 |
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0}; |
935 |
static const uint8_t table_0_entries_legacy_attrib_le16[] = |
936 |
{'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}; |
937 |
static const uint8_t table_0_entries_time_le16[] = |
938 |
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0}; |
939 |
static const uint8_t timeline_table_0_entries_Events_le16[] = |
940 |
{'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}; |
941 |
#undef _
|
942 |
|
943 |
static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
944 |
{ |
945 |
WtvContext *wtv = s->priv_data; |
946 |
int root_sector, root_size;
|
947 |
uint8_t root[WTV_SECTOR_SIZE]; |
948 |
AVIOContext *pb; |
949 |
int64_t timeline_pos; |
950 |
int ret;
|
951 |
|
952 |
wtv->epoch = |
953 |
wtv->pts = |
954 |
wtv->last_valid_pts = AV_NOPTS_VALUE; |
955 |
|
956 |
/* read root directory sector */
|
957 |
avio_seek(s->pb, 0x30, SEEK_CUR);
|
958 |
root_size = avio_rl32(s->pb); |
959 |
if (root_size > sizeof(root)) { |
960 |
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
|
961 |
return AVERROR_INVALIDDATA;
|
962 |
} |
963 |
avio_seek(s->pb, 4, SEEK_CUR);
|
964 |
root_sector = avio_rl32(s->pb); |
965 |
|
966 |
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET); |
967 |
root_size = avio_read(s->pb, root, root_size); |
968 |
if (root_size < 0) |
969 |
return AVERROR_INVALIDDATA;
|
970 |
|
971 |
/* parse chunks up until first data chunk */
|
972 |
wtv->pb = wtvfile_open(s, root, root_size, timeline_le16); |
973 |
if (!wtv->pb) {
|
974 |
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
|
975 |
return AVERROR_INVALIDDATA;
|
976 |
} |
977 |
|
978 |
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
979 |
if (ret < 0) |
980 |
return ret;
|
981 |
avio_seek(wtv->pb, -32, SEEK_CUR);
|
982 |
|
983 |
timeline_pos = avio_tell(s->pb); // save before opening another file
|
984 |
|
985 |
/* read metadata */
|
986 |
pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16); |
987 |
if (pb) {
|
988 |
parse_legacy_attrib(s, pb); |
989 |
wtvfile_close(pb); |
990 |
} |
991 |
|
992 |
/* read seek index */
|
993 |
if (s->nb_streams) {
|
994 |
AVStream *st = s->streams[0];
|
995 |
pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16); |
996 |
if (pb) {
|
997 |
while(1) { |
998 |
uint64_t timestamp = avio_rl64(pb); |
999 |
uint64_t frame_nb = avio_rl64(pb); |
1000 |
if (pb->eof_reached)
|
1001 |
break;
|
1002 |
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
1003 |
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
1004 |
} |
1005 |
wtvfile_close(pb); |
1006 |
|
1007 |
if (wtv->nb_index_entries) {
|
1008 |
pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16); |
1009 |
if (pb) {
|
1010 |
int i;
|
1011 |
while (1) { |
1012 |
uint64_t frame_nb = avio_rl64(pb); |
1013 |
uint64_t position = avio_rl64(pb); |
1014 |
if (pb->eof_reached)
|
1015 |
break;
|
1016 |
for (i = wtv->nb_index_entries - 1; i >= 0; i--) { |
1017 |
AVIndexEntry *e = wtv->index_entries + i; |
1018 |
if (frame_nb > e->size)
|
1019 |
break;
|
1020 |
if (position > e->pos)
|
1021 |
e->pos = position; |
1022 |
} |
1023 |
} |
1024 |
wtvfile_close(pb); |
1025 |
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
|
1026 |
} |
1027 |
} |
1028 |
} |
1029 |
} |
1030 |
|
1031 |
avio_seek(s->pb, timeline_pos, SEEK_SET); |
1032 |
return 0; |
1033 |
} |
1034 |
|
1035 |
static int read_packet(AVFormatContext *s, AVPacket *pkt) |
1036 |
{ |
1037 |
WtvContext *wtv = s->priv_data; |
1038 |
AVIOContext *pb = wtv->pb; |
1039 |
int stream_index, len, ret;
|
1040 |
|
1041 |
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
|
1042 |
if (stream_index < 0) |
1043 |
return stream_index;
|
1044 |
|
1045 |
ret = av_get_packet(pb, pkt, len - 32);
|
1046 |
if (ret < 0) |
1047 |
return ret;
|
1048 |
pkt->stream_index = stream_index; |
1049 |
pkt->pts = wtv->pts; |
1050 |
avio_seek(pb, WTV_PAD8(len) - len, SEEK_CUR); |
1051 |
return 0; |
1052 |
} |
1053 |
|
1054 |
static int read_seek(AVFormatContext *s, int stream_index, |
1055 |
int64_t ts, int flags)
|
1056 |
{ |
1057 |
WtvContext *wtv = s->priv_data; |
1058 |
AVIOContext *pb = wtv->pb; |
1059 |
AVStream *st = s->streams[0];
|
1060 |
int64_t ts_relative; |
1061 |
int i;
|
1062 |
|
1063 |
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
1064 |
return AVERROR_NOTSUPP;
|
1065 |
|
1066 |
/* timestamp adjustment is required because wtv->pts values are absolute,
|
1067 |
* whereas AVIndexEntry->timestamp values are relative to epoch. */
|
1068 |
ts_relative = ts; |
1069 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1070 |
ts_relative -= wtv->epoch; |
1071 |
|
1072 |
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
1073 |
if (i < 0) { |
1074 |
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
|
1075 |
avio_seek(pb, 0, SEEK_SET);
|
1076 |
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) |
1077 |
avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
|
1078 |
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
1079 |
return AVERROR(ERANGE);
|
1080 |
return 0; |
1081 |
} |
1082 |
wtv->pts = wtv->index_entries[i].timestamp; |
1083 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1084 |
wtv->pts += wtv->epoch; |
1085 |
wtv->last_valid_pts = wtv->pts; |
1086 |
avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
1087 |
return 0; |
1088 |
} |
1089 |
|
1090 |
static int read_close(AVFormatContext *s) |
1091 |
{ |
1092 |
WtvContext *wtv = s->priv_data; |
1093 |
wtvfile_close(wtv->pb); |
1094 |
return 0; |
1095 |
} |
1096 |
|
1097 |
AVInputFormat ff_wtv_demuxer = { |
1098 |
.name = "wtv",
|
1099 |
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
1100 |
.priv_data_size = sizeof(WtvContext),
|
1101 |
.read_probe = read_probe, |
1102 |
.read_header = read_header, |
1103 |
.read_packet = read_packet, |
1104 |
.read_seek = read_seek, |
1105 |
.read_close = read_close, |
1106 |
.flags = AVFMT_SHOW_IDS, |
1107 |
}; |