FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/wtvdec.c
Date: 2024-05-04 02:01:39
Exec Total Coverage
Lines: 464 641 72.4%
Functions: 21 24 87.5%
Branches: 277 469 59.1%
Line Branch Exec Source
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 <inttypes.h>
29 #include <time.h>
30
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mem.h"
35 #include "libavutil/time_internal.h"
36 #include "avformat.h"
37 #include "demux.h"
38 #include "internal.h"
39 #include "wtv.h"
40 #include "mpegts.h"
41
42 /* Macros for formatting GUIDs */
43 #define PRI_PRETTY_GUID \
44 "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%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 35
48
49 /*
50 * File system routines
51 */
52
53 typedef struct WtvFile {
54 AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */
55
56 int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
57 uint32_t *sectors; /**< file allocation table */
58 int nb_sectors; /**< number of sectors */
59
60 int error;
61 int64_t position;
62 int64_t length;
63 } WtvFile;
64
65 51 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
66 {
67 51 return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
68 }
69
70 /**
71 * @return bytes read, AVERROR_EOF on end of file, or <0 on error
72 */
73 342 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
74 {
75 342 WtvFile *wf = opaque;
76 342 AVIOContext *pb = wf->pb_filesystem;
77 342 int nread = 0, n = 0;
78
79
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 342 if (wf->error || pb->error)
80 ✗ return -1;
81
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 342 if (wf->position >= wf->length || avio_feof(pb))
82 50 return AVERROR_EOF;
83
84 292 buf_size = FFMIN(buf_size, wf->length - wf->position);
85
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 974 while(nread < buf_size) {
86 683 int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
87 683 int read_request = FFMIN(buf_size - nread, remaining_in_sector);
88
89 683 n = avio_read(pb, buf, read_request);
90
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 683 if (n <= 0)
91 1 break;
92 682 nread += n;
93 682 buf += n;
94 682 wf->position += n;
95
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 682 if (n == remaining_in_sector) {
96 424 int i = wf->position >> wf->sector_bits;
97
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 424 if (i >= wf->nb_sectors ||
98
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 426 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
99 2 seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
100 ✗ wf->error = 1;
101 ✗ break;
102 }
103 }
104 }
105
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 292 return nread ? nread : n;
106 }
107
108 /**
109 * @return position (or file length)
110 */
111 22 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
112 {
113 22 WtvFile *wf = opaque;
114 22 AVIOContext *pb = wf->pb_filesystem;
115
116
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 22 if (whence == AVSEEK_SIZE)
117 ✗ return wf->length;
118
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 22 else if (whence == SEEK_CUR)
119 ✗ offset = wf->position + offset;
120
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 22 else if (whence == SEEK_END)
121 ✗ offset = wf->length;
122
123
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 44 wf->error = offset < 0 || offset >= wf->length ||
124 22 seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
125 22 offset & ((1 << wf->sector_bits) - 1)) < 0;
126 22 wf->position = offset;
127 22 return offset;
128 }
129
130 /**
131 * read non-zero integers (le32) from input stream
132 * @param pb
133 * @param[out] data destination
134 * @param count maximum number of integers to read
135 * @return total number of integers read
136 */
137 5 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
138 {
139 5 int i, total = 0;
140
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 5125 for (i = 0; i < count; i++) {
141
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 5120 if ((data[total] = avio_rl32(pb)))
142 411 total++;
143 }
144 5 return total;
145 }
146
147 /**
148 * Open file
149 * @param first_sector First sector
150 * @param length Length of file (bytes)
151 * @param depth File allocation table depth
152 * @return NULL on error
153 */
154 12 static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
155 {
156 AVIOContext *pb;
157 WtvFile *wf;
158 uint8_t *buffer;
159 int64_t size;
160
161
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 12 if (seek_by_sector(s->pb, first_sector, 0) < 0)
162 ✗ return NULL;
163
164 12 wf = av_mallocz(sizeof(WtvFile));
165
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 12 if (!wf)
166 ✗ return NULL;
167
168
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 12 if (depth == 0) {
169 7 wf->sectors = av_malloc(sizeof(uint32_t));
170
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 7 if (!wf->sectors) {
171 ✗ av_free(wf);
172 ✗ return NULL;
173 }
174 7 wf->sectors[0] = first_sector;
175 7 wf->nb_sectors = 1;
176
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 5 } else if (depth == 1) {
177 5 wf->sectors = av_malloc(WTV_SECTOR_SIZE);
178
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 5 if (!wf->sectors) {
179 ✗ av_free(wf);
180 ✗ return NULL;
181 }
182 5 wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
183 ✗ } else if (depth == 2) {
184 uint32_t sectors1[WTV_SECTOR_SIZE / 4];
185 ✗ int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
186 int i;
187
188 ✗ wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS);
189 ✗ if (!wf->sectors) {
190 ✗ av_free(wf);
191 ✗ return NULL;
192 }
193 ✗ wf->nb_sectors = 0;
194 ✗ for (i = 0; i < nb_sectors1; i++) {
195 ✗ if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
196 ✗ break;
197 ✗ wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
198 }
199 } else {
200 ✗ av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
201 ✗ av_free(wf);
202 ✗ return NULL;
203 }
204
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 12 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
205
206
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 12 if (!wf->nb_sectors) {
207 ✗ av_freep(&wf->sectors);
208 ✗ av_freep(&wf);
209 ✗ return NULL;
210 }
211
212 12 size = avio_size(s->pb);
213
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 12 if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size)
214 1 av_log(s, AV_LOG_WARNING, "truncated file\n");
215
216 /* check length */
217 12 length &= 0xFFFFFFFFFFFF;
218
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 12 if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
219 ✗ av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits);
220 ✗ length = (int64_t)wf->nb_sectors << wf->sector_bits;
221 }
222 12 wf->length = length;
223
224 /* seek to initial sector */
225 12 wf->position = 0;
226
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 12 if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
227 ✗ av_freep(&wf->sectors);
228 ✗ av_freep(&wf);
229 ✗ return NULL;
230 }
231
232 12 wf->pb_filesystem = s->pb;
233 12 buffer = av_malloc(1 << wf->sector_bits);
234
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 12 if (!buffer) {
235 ✗ av_freep(&wf->sectors);
236 ✗ av_freep(&wf);
237 ✗ return NULL;
238 }
239
240 12 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
241 wtvfile_read_packet, NULL, wtvfile_seek);
242
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 12 if (!pb) {
243 ✗ av_freep(&buffer);
244 ✗ av_freep(&wf->sectors);
245 ✗ av_freep(&wf);
246 }
247 12 return pb;
248 }
249
250 /**
251 * Open file using filename
252 * @param[in] buf directory buffer
253 * @param buf_size directory buffer size
254 * @param[in] filename
255 * @param filename_size size of filename
256 * @return NULL on error
257 */
258 12 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
259 {
260 12 const uint8_t *buf_end = buf + buf_size;
261
262
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 54 while(buf + 48 <= buf_end) {
263 int dir_length, name_size, first_sector, depth;
264 uint64_t file_length;
265 const uint8_t *name;
266
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 54 if (ff_guidcmp(buf, ff_dir_entry_guid)) {
267 ✗ av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
268 ✗ "remaining directory entries ignored\n", FF_ARG_GUID(buf));
269 ✗ break;
270 }
271 54 dir_length = AV_RL16(buf + 16);
272 54 file_length = AV_RL64(buf + 24);
273 54 name_size = 2 * AV_RL32(buf + 32);
274
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 54 if (name_size < 0) {
275 ✗ av_log(s, AV_LOG_ERROR,
276 "bad filename length, remaining directory entries ignored\n");
277 ✗ break;
278 }
279
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 54 if (dir_length == 0) {
280 ✗ av_log(s, AV_LOG_ERROR,
281 "bad dir length, remaining directory entries ignored\n");
282 ✗ break;
283 }
284
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 54 if (48 + (int64_t)name_size > buf_end - buf) {
285 ✗ av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
286 ✗ break;
287 }
288 54 first_sector = AV_RL32(buf + 40 + name_size);
289 54 depth = AV_RL32(buf + 44 + name_size);
290
291 /* compare file name; test optional null terminator */
292 54 name = buf + 40;
293
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 54 if (name_size >= filename_size &&
294
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 45 !memcmp(name, filename, filename_size) &&
295
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 18 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
296 12 return wtvfile_open_sector(first_sector, file_length, depth, s);
297
298 42 buf += dir_length;
299 }
300 ✗ return NULL;
301 }
302
303 #define wtvfile_open(s, buf, buf_size, filename) \
304 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
305
306 /**
307 * Close file opened with wtvfile_open_sector(), or wtv_open()
308 */
309 12 static void wtvfile_close(AVIOContext *pb)
310 {
311 12 WtvFile *wf = pb->opaque;
312 12 av_freep(&wf->sectors);
313 12 av_freep(&pb->opaque);
314 12 av_freep(&pb->buffer);
315 12 avio_context_free(&pb);
316 12 }
317
318 /*
319 * Main demuxer
320 */
321
322 typedef struct WtvStream {
323 int seen_data;
324 } WtvStream;
325
326 typedef struct WtvContext {
327 AVIOContext *pb; /**< timeline file */
328 int64_t epoch;
329 int64_t pts; /**< pts for next data chunk */
330 int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
331
332 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
333 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
334 AVIndexEntry *index_entries;
335 int nb_index_entries;
336 unsigned int index_entries_allocated_size;
337 } WtvContext;
338
339 /* WTV GUIDs */
340 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
341 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
342 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
343 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
344 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
345 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
346 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
347 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
348 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
349 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
350 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
351 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
352 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
353 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
354 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
355 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
356 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
357 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
358
359 /* Windows media GUIDs */
360
361 /* Media types */
362 static const ff_asf_guid mediasubtype_mpeg1payload =
363 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
364 static const ff_asf_guid mediatype_mpeg2_sections =
365 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
366 static const ff_asf_guid mediatype_mpeg2_pes =
367 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
368 static const ff_asf_guid mediatype_mstvcaption =
369 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
370
371 /* Media subtypes */
372 static const ff_asf_guid mediasubtype_dvb_subtitle =
373 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
374 static const ff_asf_guid mediasubtype_teletext =
375 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
376 static const ff_asf_guid mediasubtype_dtvccdata =
377 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
378 static const ff_asf_guid mediasubtype_mpeg2_sections =
379 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
380
381 7128 static int read_probe(const AVProbeData *p)
382 {
383
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 7128 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
384 }
385
386 /**
387 * Convert win32 FILETIME to ISO-8601 string
388 * @return <0 on error
389 */
390 ✗ static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
391 {
392 ✗ time_t t = (value / 10000000LL) - 11644473600LL;
393 struct tm tmbuf;
394 ✗ struct tm *tm = gmtime_r(&t, &tmbuf);
395 ✗ if (!tm)
396 ✗ return -1;
397 ✗ if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
398 ✗ return -1;
399 ✗ return 0;
400 }
401
402 /**
403 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
404 * @return <0 on error
405 */
406 2 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
407 {
408 2 time_t t = (value / 10000000LL) - 719162LL*86400LL;
409 struct tm tmbuf;
410 2 struct tm *tm = gmtime_r(&t, &tmbuf);
411
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 2 if (!tm)
412 ✗ return -1;
413
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 2 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
414 ✗ return -1;
415 2 return 0;
416 }
417
418 /**
419 * Convert OLE DATE to ISO-8601 string
420 * @return <0 on error
421 */
422 1 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
423 {
424 1 time_t t = (av_int2double(value) - 25569.0) * 86400;
425 struct tm tmbuf;
426 1 struct tm *tm= gmtime_r(&t, &tmbuf);
427
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 1 if (!tm)
428 ✗ return -1;
429
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 1 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
430 ✗ return -1;
431 1 return 0;
432 }
433
434 1 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
435 {
436 char mime[1024];
437 char description[1024];
438 unsigned int filesize;
439 AVStream *st;
440 1 int64_t pos = avio_tell(pb);
441
442 1 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
443
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 1 if (strcmp(mime, "image/jpeg"))
444 ✗ goto done;
445
446 1 avio_r8(pb);
447 1 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
448 1 filesize = avio_rl32(pb);
449
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 1 if (!filesize)
450 ✗ goto done;
451
452
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 1 if (ff_add_attached_pic(s, NULL, pb, NULL, filesize) < 0)
453 ✗ goto done;
454 1 st = s->streams[s->nb_streams - 1];
455 1 av_dict_set(&st->metadata, "title", description, 0);
456 1 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
457 1 st->id = -1;
458 1 done:
459 1 avio_seek(pb, pos + length, SEEK_SET);
460 1 }
461
462 73 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
463 {
464 73 char buf[LEN_PRETTY_GUID + 1], *bufp = buf;
465 73 unsigned dict_flags = 0;
466
467
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 73 if (!strcmp(key, "WM/MediaThumbType")) {
468 1 avio_skip(pb, length);
469 8 return;
470 }
471
472
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 72 if (type == 0 && length == 4) {
473 23 snprintf(buf, sizeof(buf), "%u", avio_rl32(pb));
474
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 49 } else if (type == 1) {
475
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 23 int buflen = FFMIN(length + length / 2U + 1, INT_MAX);
476 23 bufp = av_malloc(buflen);
477
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 23 if (!bufp)
478 ✗ return;
479 23 avio_get_str16le(pb, length, bufp, buflen);
480
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 23 if (!*bufp) {
481 6 av_free(bufp);
482 6 return;
483 }
484 17 dict_flags = AV_DICT_DONT_STRDUP_VAL;
485
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 26 } else if (type == 3 && length == 4) {
486
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 17 strcpy(buf, avio_rl32(pb) ? "true" : "false");
487
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 15 } else if (type == 4 && length == 8) {
488 6 int64_t num = avio_rl64(pb);
489
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 6 if (!strcmp(key, "WM/EncodingTime") ||
490
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 6 !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
491 ✗ if (filetime_to_iso8601(buf, sizeof(buf), num) < 0)
492 ✗ return;
493
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 6 } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
494
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 5 !strcmp(key, "WM/WMRVEndTime")) {
495
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 2 if (crazytime_to_iso8601(buf, sizeof(buf), num) < 0)
496 ✗ return;
497
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 4 } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
498
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 1 if (oledate_to_iso8601(buf, sizeof(buf), num) < 0)
499 ✗ return;
500
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 3 } else if (!strcmp(key, "WM/WMRVBitrate"))
501 1 snprintf(buf, sizeof(buf), "%f", av_int2double(num));
502 else
503 2 snprintf(buf, sizeof(buf), "%"PRIi64, num);
504
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 3 } else if (type == 5 && length == 2) {
505 ✗ snprintf(buf, sizeof(buf), "%u", avio_rl16(pb));
506
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 3 } else if (type == 6 && length == 16) {
507 ff_asf_guid guid;
508 2 avio_read(pb, guid, 16);
509 2 snprintf(buf, sizeof(buf), PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
510
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 1 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
511 1 get_attachment(s, pb, length);
512 1 return;
513 } else {
514 ✗ av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
515 ✗ avio_skip(pb, length);
516 ✗ return;
517 }
518
519 65 av_dict_set(&s->metadata, key, bufp, dict_flags);
520 }
521
522 /**
523 * Parse metadata entries
524 */
525 3 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
526 {
527 ff_asf_guid guid;
528 int length, type;
529
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 76 while(!avio_feof(pb)) {
530 char key[1024];
531 76 ff_get_guid(pb, &guid);
532 76 type = avio_rl32(pb);
533 76 length = avio_rl32(pb);
534
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 76 if (length <= 0)
535 3 break;
536
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 73 if (ff_guidcmp(&guid, ff_metadata_guid)) {
537 ✗ av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
538 ✗ "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
539 ✗ break;
540 }
541 73 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
542 73 get_tag(s, pb, key, type, length);
543 }
544
545 3 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
546 3 }
547
548 /**
549 * parse VIDEOINFOHEADER2 structure
550 * @return bytes consumed
551 */
552 4 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
553 {
554 4 WtvContext *wtv = s->priv_data;
555 4 AVIOContext *pb = wtv->pb;
556
557 4 avio_skip(pb, 72); // picture aspect ratio is unreliable
558 4 st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
559
560 4 return 72 + 40;
561 }
562
563 /**
564 * Parse MPEG1WAVEFORMATEX extradata structure
565 */
566 ✗ static void parse_mpeg1waveformatex(AVStream *st)
567 {
568 /* fwHeadLayer */
569 ✗ switch (AV_RL16(st->codecpar->extradata)) {
570 ✗ case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
571 ✗ case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
572 ✗ case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
573 }
574
575 ✗ st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
576
577 /* dwHeadMode */
578 ✗ switch (AV_RL16(st->codecpar->extradata + 6)) {
579 ✗ case 1 :
580 case 2 :
581 ✗ case 4 : st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
582 ✗ break;
583 ✗ case 8 : st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
584 ✗ break;
585 }
586 ✗ }
587
588 /**
589 * Initialise stream
590 * @param st Stream to initialise, or NULL to create and initialise new stream
591 * @return NULL on error
592 */
593 12 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
594 {
595
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 12 if (st) {
596
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 4 if (st->codecpar->extradata) {
597 2 av_freep(&st->codecpar->extradata);
598 2 st->codecpar->extradata_size = 0;
599 }
600 } else {
601 8 WtvStream *wst = av_mallocz(sizeof(WtvStream));
602
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 8 if (!wst)
603 ✗ return NULL;
604 8 st = avformat_new_stream(s, NULL);
605
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 8 if (!st) {
606 ✗ av_free(wst);
607 ✗ return NULL;
608 }
609 8 st->id = sid;
610 8 st->priv_data = wst;
611 }
612 12 st->codecpar->codec_type = codec_type;
613 12 ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
614 12 avpriv_set_pts_info(st, 64, 1, 10000000);
615 12 return st;
616 }
617
618 /**
619 * parse Media Type structure and populate stream
620 * @param st Stream, or NULL to create new stream
621 * @param mediatype Mediatype GUID
622 * @param subtype Subtype GUID
623 * @param formattype Format GUID
624 * @param size Size of format buffer
625 * @return NULL on error
626 */
627 22 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
628 ff_asf_guid mediatype, ff_asf_guid subtype,
629 ff_asf_guid formattype, uint64_t size)
630 {
631 22 WtvContext *wtv = s->priv_data;
632 22 AVIOContext *pb = wtv->pb;
633
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 32 if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
634 10 !ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
635 ff_asf_guid actual_subtype;
636 ff_asf_guid actual_formattype;
637
638
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 10 if (size < 32) {
639 ✗ av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
640 ✗ avio_skip(pb, size);
641 ✗ return NULL;
642 }
643
644 10 avio_skip(pb, size - 32);
645 10 ff_get_guid(pb, &actual_subtype);
646 10 ff_get_guid(pb, &actual_formattype);
647
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 10 if (avio_feof(pb))
648 ✗ return NULL;
649 10 avio_seek(pb, -size, SEEK_CUR);
650
651 10 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
652 10 avio_skip(pb, 32);
653 10 return st;
654
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 12 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
655 6 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
656
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 6 if (!st)
657 ✗ return NULL;
658
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 6 if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
659 6 int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
660
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 6 if (ret < 0)
661 ✗ return NULL;
662 } else {
663 ✗ if (ff_guidcmp(formattype, ff_format_none))
664 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
665 ✗ avio_skip(pb, size);
666 }
667
668
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 6 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
669 ✗ st->codecpar->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codecpar->bits_per_coded_sample);
670
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 6 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
671 ✗ if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
672 ✗ parse_mpeg1waveformatex(st);
673 else
674 ✗ av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
675 } else {
676 6 st->codecpar->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
677
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 6 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
678 ✗ av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
679 }
680 6 return st;
681
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 6 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
682 4 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
683
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 4 if (!st)
684 ✗ return NULL;
685
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 4 if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
686 ✗ int consumed = parse_videoinfoheader2(s, st);
687 ✗ avio_skip(pb, FFMAX(size - consumed, 0));
688
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 4 } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
689 4 uint64_t consumed = parse_videoinfoheader2(s, st);
690 /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
691
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 4 avio_skip(pb, FFMAX(size - consumed, 0));
692 } else {
693 ✗ if (ff_guidcmp(formattype, ff_format_none))
694 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
695 ✗ avio_skip(pb, size);
696 }
697
698
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 4 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
699 ✗ st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
700 } else {
701 4 st->codecpar->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
702 }
703
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
704 ✗ av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
705 4 return st;
706
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 4 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
707 2 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
708 2 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
709
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 2 if (!st)
710 ✗ return NULL;
711
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 2 if (ff_guidcmp(formattype, ff_format_none))
712 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
713 2 avio_skip(pb, size);
714 2 st->codecpar->codec_id = AV_CODEC_ID_DVB_SUBTITLE;
715 2 return st;
716 ✗ } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
717 ✗ (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
718 ✗ st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
719 ✗ if (!st)
720 ✗ return NULL;
721 ✗ if (ff_guidcmp(formattype, ff_format_none))
722 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
723 ✗ avio_skip(pb, size);
724 ✗ st->codecpar->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608;
725 ✗ return st;
726 ✗ } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
727 ✗ !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
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));
730 ✗ avio_skip(pb, size);
731 ✗ return NULL;
732 }
733
734 ✗ av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
735 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
736 ✗ FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
737 ✗ avio_skip(pb, size);
738 ✗ return NULL;
739 }
740
741 enum {
742 SEEK_TO_DATA = 0,
743 SEEK_TO_PTS,
744 };
745
746 /**
747 * Try to seek over a broken chunk
748 * @return <0 on error
749 */
750 ✗ static int recover(WtvContext *wtv, uint64_t broken_pos)
751 {
752 ✗ AVIOContext *pb = wtv->pb;
753 int i;
754 ✗ for (i = 0; i < wtv->nb_index_entries; i++) {
755 ✗ if (wtv->index_entries[i].pos > broken_pos) {
756 ✗ int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
757 ✗ if (ret < 0)
758 ✗ return ret;
759 ✗ wtv->pts = wtv->index_entries[i].timestamp;
760 ✗ return 0;
761 }
762 }
763 ✗ return AVERROR(EIO);
764 }
765
766 /**
767 * Parse WTV chunks
768 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
769 * @param seekts timestamp
770 * @param[out] len_ptr Length of data chunk
771 * @return stream index of data chunk, or <0 on error
772 */
773 321 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
774 {
775 321 WtvContext *wtv = s->priv_data;
776 321 AVIOContext *pb = wtv->pb;
777
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 1469 while (!avio_feof(pb)) {
778 ff_asf_guid g;
779 int len, sid, consumed;
780
781 1458 ff_get_guid(pb, &g);
782 1458 len = avio_rl32(pb);
783
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 1458 if (len < 32 || len > INT_MAX - 7) {
784 int ret;
785
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 7 if (avio_feof(pb))
786 310 return AVERROR_EOF;
787 ✗ av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
788 ✗ if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
789 ✗ return ret;
790 ✗ continue;
791 }
792 1451 sid = avio_rl32(pb) & 0x7FFF;
793 1451 avio_skip(pb, 8);
794 1451 consumed = 32;
795
796
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 1451 if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) {
797
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 34 if (ff_find_stream_index(s, sid) < 0) {
798 ff_asf_guid mediatype, subtype, formattype;
799 int size;
800 8 avio_skip(pb, 28);
801 8 ff_get_guid(pb, &mediatype);
802 8 ff_get_guid(pb, &subtype);
803 8 avio_skip(pb, 12);
804 8 ff_get_guid(pb, &formattype);
805 8 size = avio_rl32(pb);
806
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 8 if (size < 0 || size > INT_MAX - 92 - consumed)
807 ✗ return AVERROR_INVALIDDATA;
808 8 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
809 8 consumed += 92 + size;
810 }
811
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 1417 } else if (!ff_guidcmp(g, ff_stream2_guid)) {
812 28 int stream_index = ff_find_stream_index(s, sid);
813
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 28 if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
814 ff_asf_guid mediatype, subtype, formattype;
815 int size;
816 4 avio_skip(pb, 12);
817 4 ff_get_guid(pb, &mediatype);
818 4 ff_get_guid(pb, &subtype);
819 4 avio_skip(pb, 12);
820 4 ff_get_guid(pb, &formattype);
821 4 size = avio_rl32(pb);
822
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 4 if (size < 0 || size > INT_MAX - 76 - consumed)
823 ✗ return AVERROR_INVALIDDATA;
824 4 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
825 4 consumed += 76 + size;
826 }
827
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 2778 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
828
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 2778 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
829
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 2778 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
830
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 2775 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
831
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 2771 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
832 1389 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
833 4 int stream_index = ff_find_stream_index(s, sid);
834
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 4 if (stream_index >= 0) {
835 4 AVStream *st = s->streams[stream_index];
836 uint8_t buf[258];
837 4 const uint8_t *pbuf = buf;
838 int buf_size;
839
840 4 avio_skip(pb, 8);
841 4 consumed += 8;
842
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 8 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
843 4 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
844 ✗ avio_skip(pb, 6);
845 ✗ consumed += 6;
846 }
847
848 4 buf_size = FFMIN(len - consumed, sizeof(buf));
849 4 avio_read(pb, buf, buf_size);
850 4 consumed += buf_size;
851 4 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
852 }
853
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 1385 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
854 2 int stream_index = ff_find_stream_index(s, sid);
855
1/2
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 2 if (stream_index >= 0) {
856 2 AVStream *st = s->streams[stream_index];
857 int audio_type;
858 2 avio_skip(pb, 8);
859 2 audio_type = avio_r8(pb);
860
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 2 if (audio_type == 2)
861 1 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
862
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 1 else if (audio_type == 3)
863 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
864 2 consumed += 9;
865 }
866
2/2
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 1383 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
867 3 int stream_index = ff_find_stream_index(s, sid);
868
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 3 if (stream_index >= 0) {
869 3 avio_skip(pb, 12);
870
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 3 if (avio_rl32(pb))
871 ✗ av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
872 3 consumed += 16;
873 }
874
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 1380 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
875 2 int stream_index = ff_find_stream_index(s, sid);
876
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 2 if (stream_index >= 0) {
877 2 AVStream *st = s->streams[stream_index];
878 uint8_t language[4];
879 2 avio_skip(pb, 12);
880 2 avio_read(pb, language, 3);
881
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 2 if (language[0]) {
882 2 language[3] = 0;
883 2 av_dict_set(&st->metadata, "language", language, 0);
884
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 2 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
885 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
886 }
887 2 consumed += 15;
888 }
889
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 1378 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
890 397 int stream_index = ff_find_stream_index(s, sid);
891
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 397 if (stream_index >= 0) {
892 397 avio_skip(pb, 8);
893 397 wtv->pts = avio_rl64(pb);
894 397 consumed += 16;
895
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 397 if (wtv->pts == -1)
896 45 wtv->pts = AV_NOPTS_VALUE;
897 else {
898 352 wtv->last_valid_pts = wtv->pts;
899
4/4
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 352 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
900 5 wtv->epoch = wtv->pts;
901
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 352 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
902 5 avio_skip(pb, WTV_PAD8(len) - consumed);
903 5 return 0;
904 }
905 }
906 }
907
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 981 } else if (!ff_guidcmp(g, ff_data_guid)) {
908 400 int stream_index = ff_find_stream_index(s, sid);
909
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 400 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
910 298 WtvStream *wst = s->streams[stream_index]->priv_data;
911 298 wst->seen_data = 1;
912
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 298 if (len_ptr) {
913 295 *len_ptr = len;
914 }
915 298 return stream_index;
916 }
917
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 581 } 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})) {
918 ✗ int stream_index = ff_find_stream_index(s, sid);
919 ✗ if (stream_index >= 0)
920 ✗ av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
921
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 581 } else if (
922
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 1029 !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}) ||
923
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✓ Branch 2 taken 96 times.
 896 !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}) ||
924
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 800 !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}) ||
925
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 571 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
926
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 342 !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}) ||
927
2/2
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 245 !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}) ||
928
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 243 !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}) ||
929
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 242 !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}) ||
930
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 238 !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}) ||
931
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 233 !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}) ||
932
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 229 !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}) ||
933
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 226 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
934
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 226 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
935
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 226 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
936
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 226 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
937
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 226 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
938
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 199 !ff_guidcmp(g, ff_index_guid) ||
939
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 137 !ff_guidcmp(g, ff_sync_guid) ||
940
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 51 !ff_guidcmp(g, ff_stream1_guid) ||
941 ✗ !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
942 //ignore known guids
943 } else
944 ✗ av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
945
946
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 1148 if (avio_feof(pb))
947 ✗ break;
948
949 1148 avio_skip(pb, WTV_PAD8(len) - consumed);
950 }
951 11 return AVERROR_EOF;
952 }
953
954 3 static int read_header(AVFormatContext *s)
955 {
956 3 WtvContext *wtv = s->priv_data;
957 unsigned root_sector;
958 int root_size;
959 uint8_t root[WTV_SECTOR_SIZE];
960 AVIOContext *pb;
961 int64_t timeline_pos;
962 int64_t ret;
963
964 3 wtv->epoch =
965 3 wtv->pts =
966 3 wtv->last_valid_pts = AV_NOPTS_VALUE;
967
968 /* read root directory sector */
969 3 avio_skip(s->pb, 0x30);
970 3 root_size = avio_rl32(s->pb);
971
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 3 if (root_size > sizeof(root)) {
972 ✗ av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
973 ✗ return AVERROR_INVALIDDATA;
974 }
975 3 avio_skip(s->pb, 4);
976 3 root_sector = avio_rl32(s->pb);
977
978 3 ret = seek_by_sector(s->pb, root_sector, 0);
979
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 3 if (ret < 0)
980 ✗ return ret;
981 3 root_size = avio_read(s->pb, root, root_size);
982
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 3 if (root_size < 0)
983 ✗ return AVERROR_INVALIDDATA;
984
985 /* parse chunks up until first data chunk */
986 3 wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
987
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 3 if (!wtv->pb) {
988 ✗ av_log(s, AV_LOG_ERROR, "timeline data missing\n");
989 ✗ return AVERROR_INVALIDDATA;
990 }
991
992 3 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
993
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 3 if (ret < 0) {
994 ✗ wtvfile_close(wtv->pb);
995 ✗ return ret;
996 }
997 3 avio_seek(wtv->pb, -32, SEEK_CUR);
998
999 3 timeline_pos = avio_tell(s->pb); // save before opening another file
1000
1001 /* read metadata */
1002 3 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1003
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 3 if (pb) {
1004 3 parse_legacy_attrib(s, pb);
1005 3 wtvfile_close(pb);
1006 }
1007
1008 3 s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1009
1010 /* read seek index */
1011
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 3 if (s->nb_streams) {
1012 3 AVStream *st = s->streams[0];
1013 3 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1014
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 3 if (pb) {
1015 316 while(1) {
1016 319 uint64_t timestamp = avio_rl64(pb);
1017 319 uint64_t frame_nb = avio_rl64(pb);
1018
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 319 if (avio_feof(pb))
1019 3 break;
1020 316 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
1021 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1022 }
1023 3 wtvfile_close(pb);
1024
1025
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 3 if (wtv->nb_index_entries) {
1026 3 pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1027
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 3 if (pb) {
1028 3 AVIndexEntry *e = wtv->index_entries;
1029 3 AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1030 3 uint64_t last_position = 0;
1031 207 while (1) {
1032 210 uint64_t frame_nb = avio_rl64(pb);
1033 210 uint64_t position = avio_rl64(pb);
1034
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 519 while (e <= e_end && frame_nb > e->size) {
1035 309 e->pos = last_position;
1036 309 e++;
1037 }
1038
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 210 if (avio_feof(pb))
1039 3 break;
1040 207 last_position = position;
1041 }
1042 3 e_end->pos = last_position;
1043 3 wtvfile_close(pb);
1044 3 st->duration = e_end->timestamp;
1045 }
1046 }
1047 }
1048 }
1049
1050 3 avio_seek(s->pb, timeline_pos, SEEK_SET);
1051 3 return 0;
1052 }
1053
1054 308 static int read_packet(AVFormatContext *s, AVPacket *pkt)
1055 {
1056 308 WtvContext *wtv = s->priv_data;
1057 308 AVIOContext *pb = wtv->pb;
1058 int stream_index, len, ret;
1059
1060 308 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1061
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 308 if (stream_index < 0)
1062 13 return stream_index;
1063
1064 295 ret = av_get_packet(pb, pkt, len - 32);
1065
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 295 if (ret < 0)
1066 ✗ return ret;
1067 295 pkt->stream_index = stream_index;
1068 295 pkt->pts = wtv->pts;
1069 295 avio_skip(pb, WTV_PAD8(len) - len);
1070 295 return 0;
1071 }
1072
1073 26 static int read_seek(AVFormatContext *s, int stream_index,
1074 int64_t ts, int flags)
1075 {
1076 26 WtvContext *wtv = s->priv_data;
1077 26 AVIOContext *pb = wtv->pb;
1078 26 AVStream *st = s->streams[0];
1079 int64_t ts_relative;
1080 int i;
1081
1082
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 26 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1083 ✗ return AVERROR(ENOSYS);
1084
1085 /* timestamp adjustment is required because wtv->pts values are absolute,
1086 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1087 26 ts_relative = ts;
1088
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 26 if (wtv->epoch != AV_NOPTS_VALUE)
1089 26 ts_relative -= wtv->epoch;
1090
1091 26 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1092
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 26 if (i < 0) {
1093
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 10 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1094
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 5 if (avio_seek(pb, 0, SEEK_SET) < 0)
1095 ✗ return -1;
1096
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 5 } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1097
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 5 if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1098 ✗ return -1;
1099 }
1100
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 10 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1101 5 return AVERROR(ERANGE);
1102 5 return 0;
1103 }
1104
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✓ Branch 2 taken 16 times.
 16 if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1105 ✗ return -1;
1106 16 wtv->pts = wtv->index_entries[i].timestamp;
1107
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 16 if (wtv->epoch != AV_NOPTS_VALUE)
1108 16 wtv->pts += wtv->epoch;
1109 16 wtv->last_valid_pts = wtv->pts;
1110 16 return 0;
1111 }
1112
1113 3 static int read_close(AVFormatContext *s)
1114 {
1115 3 WtvContext *wtv = s->priv_data;
1116 3 av_freep(&wtv->index_entries);
1117 3 wtvfile_close(wtv->pb);
1118 3 return 0;
1119 }
1120
1121 const FFInputFormat ff_wtv_demuxer = {
1122 .p.name = "wtv",
1123 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1124 .p.flags = AVFMT_SHOW_IDS,
1125 .priv_data_size = sizeof(WtvContext),
1126 .read_probe = read_probe,
1127 .read_header = read_header,
1128 .read_packet = read_packet,
1129 .read_seek = read_seek,
1130 .read_close = read_close,
1131 };
1132