FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/wtvdec.c
Date: 2025-10-24 21:16:34
Exec Total Coverage
Lines: 466 644 72.4%
Functions: 21 24 87.5%
Branches: 277 467 59.3%
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 "avio_internal.h"
38 #include "demux.h"
39 #include "internal.h"
40 #include "wtv.h"
41 #include "mpegts.h"
42
43 /* Macros for formatting GUIDs */
44 #define PRI_PRETTY_GUID \
45 "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
46 #define ARG_PRETTY_GUID(g) \
47 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]
48 #define LEN_PRETTY_GUID 35
49
50 /*
51 * File system routines
52 */
53
54 typedef struct WtvFile {
55 AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */
56
57 int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
58 uint32_t *sectors; /**< file allocation table */
59 int nb_sectors; /**< number of sectors */
60
61 int error;
62 int64_t position;
63 int64_t length;
64 } WtvFile;
65
66 51 static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset)
67 {
68 51 return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET);
69 }
70
71 /**
72 * @return bytes read, AVERROR_EOF on end of file, or <0 on error
73 */
74 342 static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
75 {
76 342 WtvFile *wf = opaque;
77 342 AVIOContext *pb = wf->pb_filesystem;
78 342 int nread = 0, n = 0;
79
80
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 342 if (wf->error || pb->error)
81 ✗ return -1;
82
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 342 if (wf->position >= wf->length || avio_feof(pb))
83 50 return AVERROR_EOF;
84
85 292 buf_size = FFMIN(buf_size, wf->length - wf->position);
86
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 974 while(nread < buf_size) {
87 683 int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1));
88 683 int read_request = FFMIN(buf_size - nread, remaining_in_sector);
89
90 683 n = avio_read(pb, buf, read_request);
91
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 683 if (n <= 0)
92 1 break;
93 682 nread += n;
94 682 buf += n;
95 682 wf->position += n;
96
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 682 if (n == remaining_in_sector) {
97 424 int i = wf->position >> wf->sector_bits;
98
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 424 if (i >= wf->nb_sectors ||
99
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 426 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
100 2 seek_by_sector(pb, wf->sectors[i], 0) < 0)) {
101 ✗ wf->error = 1;
102 ✗ break;
103 }
104 }
105 }
106
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 292 return nread ? nread : n;
107 }
108
109 /**
110 * @return position (or file length)
111 */
112 22 static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
113 {
114 22 WtvFile *wf = opaque;
115 22 AVIOContext *pb = wf->pb_filesystem;
116
117
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 22 if (whence == AVSEEK_SIZE)
118 ✗ return wf->length;
119
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 22 else if (whence == SEEK_CUR)
120 ✗ offset = wf->position + offset;
121
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 22 else if (whence == SEEK_END)
122 ✗ offset = wf->length;
123
124
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 44 wf->error = offset < 0 || offset >= wf->length ||
125 22 seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits],
126 22 offset & ((1 << wf->sector_bits) - 1)) < 0;
127 22 wf->position = offset;
128 22 return offset;
129 }
130
131 /**
132 * read non-zero integers (le32) from input stream
133 * @param pb
134 * @param[out] data destination
135 * @param count maximum number of integers to read
136 * @return total number of integers read
137 */
138 5 static int read_ints(AVIOContext *pb, uint32_t *data, int count)
139 {
140 5 int i, total = 0;
141
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 5125 for (i = 0; i < count; i++) {
142
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 5120 if ((data[total] = avio_rl32(pb)))
143 411 total++;
144 }
145 5 return total;
146 }
147
148 /**
149 * Open file
150 * @param first_sector First sector
151 * @param length Length of file (bytes)
152 * @param depth File allocation table depth
153 * @return NULL on error
154 */
155 12 static AVIOContext * wtvfile_open_sector(unsigned first_sector, uint64_t length, int depth, AVFormatContext *s)
156 {
157 AVIOContext *pb;
158 WtvFile *wf;
159 uint8_t *buffer;
160 int64_t size;
161
162
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 12 if (seek_by_sector(s->pb, first_sector, 0) < 0)
163 ✗ return NULL;
164
165 12 wf = av_mallocz(sizeof(WtvFile));
166
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 12 if (!wf)
167 ✗ return NULL;
168
169
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 12 if (depth == 0) {
170 7 wf->sectors = av_malloc(sizeof(uint32_t));
171
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 7 if (!wf->sectors) {
172 ✗ av_free(wf);
173 ✗ return NULL;
174 }
175 7 wf->sectors[0] = first_sector;
176 7 wf->nb_sectors = 1;
177
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 5 } else if (depth == 1) {
178 5 wf->sectors = av_malloc(WTV_SECTOR_SIZE);
179
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 5 if (!wf->sectors) {
180 ✗ av_free(wf);
181 ✗ return NULL;
182 }
183 5 wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
184 ✗ } else if (depth == 2) {
185 uint32_t sectors1[WTV_SECTOR_SIZE / 4];
186 ✗ int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4);
187 int i;
188
189 ✗ wf->sectors = av_calloc(nb_sectors1, 1 << WTV_SECTOR_BITS);
190 ✗ if (!wf->sectors) {
191 ✗ av_free(wf);
192 ✗ return NULL;
193 }
194 ✗ wf->nb_sectors = 0;
195 ✗ for (i = 0; i < nb_sectors1; i++) {
196 ✗ if (seek_by_sector(s->pb, sectors1[i], 0) < 0)
197 ✗ break;
198 ✗ wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
199 }
200 } else {
201 ✗ av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
202 ✗ av_free(wf);
203 ✗ return NULL;
204 }
205
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 12 wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
206
207
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 12 if (!wf->nb_sectors) {
208 ✗ av_freep(&wf->sectors);
209 ✗ av_freep(&wf);
210 ✗ return NULL;
211 }
212
213 12 size = avio_size(s->pb);
214
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 12 if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size)
215 1 av_log(s, AV_LOG_WARNING, "truncated file\n");
216
217 /* check length */
218 12 length &= 0xFFFFFFFFFFFF;
219
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 12 if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
220 ✗ 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);
221 ✗ length = (int64_t)wf->nb_sectors << wf->sector_bits;
222 }
223 12 wf->length = length;
224
225 /* seek to initial sector */
226 12 wf->position = 0;
227
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 12 if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) {
228 ✗ av_freep(&wf->sectors);
229 ✗ av_freep(&wf);
230 ✗ return NULL;
231 }
232
233 12 wf->pb_filesystem = s->pb;
234 12 buffer = av_malloc(1 << wf->sector_bits);
235
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 12 if (!buffer) {
236 ✗ av_freep(&wf->sectors);
237 ✗ av_freep(&wf);
238 ✗ return NULL;
239 }
240
241 12 pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf,
242 wtvfile_read_packet, NULL, wtvfile_seek);
243
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 12 if (!pb) {
244 ✗ av_freep(&buffer);
245 ✗ av_freep(&wf->sectors);
246 ✗ av_freep(&wf);
247 }
248 12 return pb;
249 }
250
251 /**
252 * Open file using filename
253 * @param[in] buf directory buffer
254 * @param buf_size directory buffer size
255 * @param[in] filename
256 * @param filename_size size of filename
257 * @return NULL on error
258 */
259 12 static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
260 {
261 12 const uint8_t *buf_end = buf + buf_size;
262
263
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 54 while(buf + 48 <= buf_end) {
264 int dir_length, name_size, first_sector, depth;
265 uint64_t file_length;
266 const uint8_t *name;
267
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 54 if (ff_guidcmp(buf, ff_dir_entry_guid)) {
268 ✗ av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; "
269 ✗ "remaining directory entries ignored\n", FF_ARG_GUID(buf));
270 ✗ break;
271 }
272 54 dir_length = AV_RL16(buf + 16);
273 54 file_length = AV_RL64(buf + 24);
274 54 name_size = 2 * AV_RL32(buf + 32);
275
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 54 if (name_size < 0) {
276 ✗ av_log(s, AV_LOG_ERROR,
277 "bad filename length, remaining directory entries ignored\n");
278 ✗ break;
279 }
280
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 54 if (dir_length == 0) {
281 ✗ av_log(s, AV_LOG_ERROR,
282 "bad dir length, remaining directory entries ignored\n");
283 ✗ break;
284 }
285
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 54 if (48 + (int64_t)name_size > buf_end - buf) {
286 ✗ av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
287 ✗ break;
288 }
289 54 first_sector = AV_RL32(buf + 40 + name_size);
290 54 depth = AV_RL32(buf + 44 + name_size);
291
292 /* compare file name; test optional null terminator */
293 54 name = buf + 40;
294
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 54 if (name_size >= filename_size &&
295
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 45 !memcmp(name, filename, filename_size) &&
296
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 18 (name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
297 12 return wtvfile_open_sector(first_sector, file_length, depth, s);
298
299 42 buf += dir_length;
300 }
301 ✗ return NULL;
302 }
303
304 #define wtvfile_open(s, buf, buf_size, filename) \
305 wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
306
307 /**
308 * Close file opened with wtvfile_open_sector(), or wtv_open()
309 */
310 12 static void wtvfile_close(AVIOContext *pb)
311 {
312 12 WtvFile *wf = pb->opaque;
313 12 av_freep(&wf->sectors);
314 12 av_freep(&pb->opaque);
315 12 av_freep(&pb->buffer);
316 12 avio_context_free(&pb);
317 12 }
318
319 /*
320 * Main demuxer
321 */
322
323 typedef struct WtvStream {
324 int seen_data;
325 } WtvStream;
326
327 typedef struct WtvContext {
328 AVIOContext *pb; /**< timeline file */
329 int64_t epoch;
330 int64_t pts; /**< pts for next data chunk */
331 int64_t last_valid_pts; /**< latest valid pts, used for interactive seeking */
332
333 /* maintain private seek index, as the AVIndexEntry->pos is relative to the
334 start of the 'timeline' file, not the file system (AVFormatContext->pb) */
335 AVIndexEntry *index_entries;
336 int nb_index_entries;
337 unsigned int index_entries_allocated_size;
338 } WtvContext;
339
340 /* WTV GUIDs */
341 static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
342 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
343 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
344 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
345 static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
346 {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
347 static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
348 {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
349 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
350 {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
351 static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
352 {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
353 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
354 {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
355 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
356 {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
357 static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
358 {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3};
359
360 /* Windows media GUIDs */
361
362 /* Media types */
363 static const ff_asf_guid mediasubtype_mpeg1payload =
364 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
365 static const ff_asf_guid mediatype_mpeg2_sections =
366 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
367 static const ff_asf_guid mediatype_mpeg2_pes =
368 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
369 static const ff_asf_guid mediatype_mstvcaption =
370 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
371
372 /* Media subtypes */
373 static const ff_asf_guid mediasubtype_dvb_subtitle =
374 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
375 static const ff_asf_guid mediasubtype_teletext =
376 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
377 static const ff_asf_guid mediasubtype_dtvccdata =
378 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
379 static const ff_asf_guid mediasubtype_mpeg2_sections =
380 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
381
382 7279 static int read_probe(const AVProbeData *p)
383 {
384
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 7279 return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
385 }
386
387 /**
388 * Convert win32 FILETIME to ISO-8601 string
389 * @return <0 on error
390 */
391 ✗ static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
392 {
393 ✗ time_t t = (value / 10000000LL) - 11644473600LL;
394 struct tm tmbuf;
395 ✗ struct tm *tm = gmtime_r(&t, &tmbuf);
396 ✗ if (!tm)
397 ✗ return -1;
398 ✗ if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
399 ✗ return -1;
400 ✗ return 0;
401 }
402
403 /**
404 * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
405 * @return <0 on error
406 */
407 2 static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
408 {
409 2 time_t t = (value / 10000000LL) - 719162LL*86400LL;
410 struct tm tmbuf;
411 2 struct tm *tm = gmtime_r(&t, &tmbuf);
412
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 2 if (!tm)
413 ✗ return -1;
414
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 2 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
415 ✗ return -1;
416 2 return 0;
417 }
418
419 /**
420 * Convert OLE DATE to ISO-8601 string
421 * @return <0 on error
422 */
423 1 static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
424 {
425 1 time_t t = (av_int2double(value) - 25569.0) * 86400;
426 struct tm tmbuf;
427 1 struct tm *tm= gmtime_r(&t, &tmbuf);
428
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 1 if (!tm)
429 ✗ return -1;
430
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 1 if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
431 ✗ return -1;
432 1 return 0;
433 }
434
435 1 static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
436 {
437 char mime[1024];
438 char description[1024];
439 unsigned int filesize;
440 AVStream *st;
441 1 int64_t pos = avio_tell(pb);
442
443 1 avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
444
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 1 if (strcmp(mime, "image/jpeg"))
445 ✗ goto done;
446
447 1 avio_r8(pb);
448 1 avio_get_str16le(pb, INT_MAX, description, sizeof(description));
449 1 filesize = avio_rl32(pb);
450
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 1 if (!filesize)
451 ✗ goto done;
452
453
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 1 if (ff_add_attached_pic(s, NULL, pb, NULL, filesize) < 0)
454 ✗ goto done;
455 1 st = s->streams[s->nb_streams - 1];
456 1 av_dict_set(&st->metadata, "title", description, 0);
457 1 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
458 1 st->id = -1;
459 1 done:
460 1 avio_seek(pb, pos + length, SEEK_SET);
461 1 }
462
463 73 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
464 {
465 73 char buf[LEN_PRETTY_GUID + 1], *bufp = buf;
466 73 unsigned dict_flags = 0;
467
468
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 73 if (!strcmp(key, "WM/MediaThumbType")) {
469 1 avio_skip(pb, length);
470 8 return;
471 }
472
473
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 72 if (type == 0 && length == 4) {
474 23 snprintf(buf, sizeof(buf), "%u", avio_rl32(pb));
475
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 49 } else if (type == 1) {
476
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 23 int buflen = FFMIN(length + length / 2U + 1, INT_MAX);
477 23 bufp = av_malloc(buflen);
478
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 23 if (!bufp)
479 ✗ return;
480 23 avio_get_str16le(pb, length, bufp, buflen);
481
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 23 if (!*bufp) {
482 6 av_free(bufp);
483 6 return;
484 }
485 17 dict_flags = AV_DICT_DONT_STRDUP_VAL;
486
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 26 } else if (type == 3 && length == 4) {
487
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 17 strcpy(buf, avio_rl32(pb) ? "true" : "false");
488
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 15 } else if (type == 4 && length == 8) {
489 6 int64_t num = avio_rl64(pb);
490
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 6 if (!strcmp(key, "WM/EncodingTime") ||
491
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 6 !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
492 ✗ if (filetime_to_iso8601(buf, sizeof(buf), num) < 0)
493 ✗ return;
494
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 6 } else if (!strcmp(key, "WM/WMRVEncodeTime") ||
495
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 5 !strcmp(key, "WM/WMRVEndTime")) {
496
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 2 if (crazytime_to_iso8601(buf, sizeof(buf), num) < 0)
497 ✗ return;
498
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 4 } else if (!strcmp(key, "WM/WMRVExpirationDate")) {
499
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 1 if (oledate_to_iso8601(buf, sizeof(buf), num) < 0)
500 ✗ return;
501
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 3 } else if (!strcmp(key, "WM/WMRVBitrate"))
502 1 snprintf(buf, sizeof(buf), "%f", av_int2double(num));
503 else
504 2 snprintf(buf, sizeof(buf), "%"PRIi64, num);
505
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 3 } else if (type == 5 && length == 2) {
506 ✗ snprintf(buf, sizeof(buf), "%u", avio_rl16(pb));
507
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 3 } else if (type == 6 && length == 16) {
508 ff_asf_guid guid;
509 2 avio_read(pb, guid, 16);
510 2 snprintf(buf, sizeof(buf), PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
511
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 1 } else if (type == 2 && !strcmp(key, "WM/Picture")) {
512 1 get_attachment(s, pb, length);
513 1 return;
514 } else {
515 ✗ av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
516 ✗ avio_skip(pb, length);
517 ✗ return;
518 }
519
520 65 av_dict_set(&s->metadata, key, bufp, dict_flags);
521 }
522
523 /**
524 * Parse metadata entries
525 */
526 3 static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
527 {
528 ff_asf_guid guid;
529 int length, type;
530
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 76 while(!avio_feof(pb)) {
531 char key[1024];
532 76 ff_get_guid(pb, &guid);
533 76 type = avio_rl32(pb);
534 76 length = avio_rl32(pb);
535
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 76 if (length <= 0)
536 3 break;
537
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 73 if (ff_guidcmp(&guid, ff_metadata_guid)) {
538 ✗ av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
539 ✗ "remaining metadata entries ignored\n", FF_ARG_GUID(guid));
540 ✗ break;
541 }
542 73 avio_get_str16le(pb, INT_MAX, key, sizeof(key));
543 73 get_tag(s, pb, key, type, length);
544 }
545
546 3 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
547 3 }
548
549 /**
550 * parse VIDEOINFOHEADER2 structure
551 * @return bytes consumed
552 */
553 4 static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
554 {
555 4 WtvContext *wtv = s->priv_data;
556 4 AVIOContext *pb = wtv->pb;
557
558 4 avio_skip(pb, 72); // picture aspect ratio is unreliable
559 4 st->codecpar->codec_tag = ff_get_bmp_header(pb, st, NULL);
560
561 4 return 72 + 40;
562 }
563
564 /**
565 * Parse MPEG1WAVEFORMATEX extradata structure
566 */
567 ✗ static void parse_mpeg1waveformatex(AVStream *st)
568 {
569 /* fwHeadLayer */
570 ✗ switch (AV_RL16(st->codecpar->extradata)) {
571 ✗ case 0x0001 : st->codecpar->codec_id = AV_CODEC_ID_MP1; break;
572 ✗ case 0x0002 : st->codecpar->codec_id = AV_CODEC_ID_MP2; break;
573 ✗ case 0x0004 : st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
574 }
575
576 ✗ st->codecpar->bit_rate = AV_RL32(st->codecpar->extradata + 2); /* dwHeadBitrate */
577
578 /* dwHeadMode */
579 ✗ switch (AV_RL16(st->codecpar->extradata + 6)) {
580 ✗ case 1 :
581 case 2 :
582 ✗ case 4 : st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
583 ✗ break;
584 ✗ case 8 : st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
585 ✗ break;
586 }
587 ✗ }
588
589 /**
590 * Initialise stream
591 * @param st Stream to initialise, or NULL to create and initialise new stream
592 * @return NULL on error
593 */
594 12 static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
595 {
596
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 12 if (st) {
597
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 4 if (st->codecpar->extradata) {
598 2 av_freep(&st->codecpar->extradata);
599 2 st->codecpar->extradata_size = 0;
600 }
601 } else {
602 8 WtvStream *wst = av_mallocz(sizeof(WtvStream));
603
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 8 if (!wst)
604 ✗ return NULL;
605 8 st = avformat_new_stream(s, NULL);
606
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 8 if (!st) {
607 ✗ av_free(wst);
608 ✗ return NULL;
609 }
610 8 st->id = sid;
611 8 st->priv_data = wst;
612 }
613 12 st->codecpar->codec_type = codec_type;
614 12 ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
615 12 avpriv_set_pts_info(st, 64, 1, 10000000);
616 12 return st;
617 }
618
619 /**
620 * parse Media Type structure and populate stream
621 * @param st Stream, or NULL to create new stream
622 * @param mediatype Mediatype GUID
623 * @param subtype Subtype GUID
624 * @param formattype Format GUID
625 * @param size Size of format buffer
626 * @return NULL on error
627 */
628 22 static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
629 ff_asf_guid mediatype, ff_asf_guid subtype,
630 ff_asf_guid formattype, uint64_t size)
631 {
632 22 WtvContext *wtv = s->priv_data;
633 22 AVIOContext *pb = wtv->pb;
634
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 32 if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
635 10 !ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
636 ff_asf_guid actual_subtype;
637 ff_asf_guid actual_formattype;
638
639
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 10 if (size < 32) {
640 ✗ av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
641 ✗ avio_skip(pb, size);
642 ✗ return NULL;
643 }
644
645 10 avio_skip(pb, size - 32);
646 10 ff_get_guid(pb, &actual_subtype);
647 10 ff_get_guid(pb, &actual_formattype);
648
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 10 if (avio_feof(pb))
649 ✗ return NULL;
650 10 avio_seek(pb, -size, SEEK_CUR);
651
652 10 st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
653 10 avio_skip(pb, 32);
654 10 return st;
655
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 12 } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
656 6 st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
657
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 6 if (!st)
658 ✗ return NULL;
659
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 6 if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
660 6 int ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
661
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 6 if (ret < 0)
662 ✗ return NULL;
663 } else {
664 ✗ if (ff_guidcmp(formattype, ff_format_none))
665 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
666 ✗ avio_skip(pb, size);
667 }
668
669
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 6 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
670 ✗ st->codecpar->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codecpar->bits_per_coded_sample);
671
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 6 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
672 ✗ if (st->codecpar->extradata && st->codecpar->extradata_size >= 22)
673 ✗ parse_mpeg1waveformatex(st);
674 else
675 ✗ av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
676 } else {
677 6 st->codecpar->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
678
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 6 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
679 ✗ av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
680 }
681 6 return st;
682
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 6 } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
683 4 st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
684
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 4 if (!st)
685 ✗ return NULL;
686
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 4 if (!ff_guidcmp(formattype, ff_format_videoinfo2)) {
687 ✗ int consumed = parse_videoinfoheader2(s, st);
688 ✗ avio_skip(pb, FFMAX(size - consumed, 0));
689
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 4 } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
690 4 uint64_t consumed = parse_videoinfoheader2(s, st);
691 /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
692 4 avio_skip(pb, FFMAX(size - consumed, 0));
693 } else {
694 ✗ if (ff_guidcmp(formattype, ff_format_none))
695 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
696 ✗ avio_skip(pb, size);
697 }
698
699
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 4 if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
700 ✗ st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
701 } else {
702 4 st->codecpar->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
703 }
704
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
705 ✗ av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
706 4 return st;
707
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 4 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
708 2 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
709 2 st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
710
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 2 if (!st)
711 ✗ return NULL;
712
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 2 if (ff_guidcmp(formattype, ff_format_none))
713 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
714 2 avio_skip(pb, size);
715 2 st->codecpar->codec_id = AV_CODEC_ID_DVB_SUBTITLE;
716 2 return st;
717 ✗ } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
718 ✗ (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
719 ✗ st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
720 ✗ if (!st)
721 ✗ return NULL;
722 ✗ if (ff_guidcmp(formattype, ff_format_none))
723 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
724 ✗ avio_skip(pb, size);
725 ✗ st->codecpar->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608;
726 ✗ return st;
727 ✗ } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
728 ✗ !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
729 ✗ if (ff_guidcmp(formattype, ff_format_none))
730 ✗ av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
731 ✗ avio_skip(pb, size);
732 ✗ return NULL;
733 }
734
735 ✗ av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
736 ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
737 ✗ FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
738 ✗ avio_skip(pb, size);
739 ✗ return NULL;
740 }
741
742 enum {
743 SEEK_TO_DATA = 0,
744 SEEK_TO_PTS,
745 };
746
747 /**
748 * Try to seek over a broken chunk
749 * @return <0 on error
750 */
751 ✗ static int recover(WtvContext *wtv, uint64_t broken_pos)
752 {
753 ✗ AVIOContext *pb = wtv->pb;
754 int i;
755 ✗ for (i = 0; i < wtv->nb_index_entries; i++) {
756 ✗ if (wtv->index_entries[i].pos > broken_pos) {
757 ✗ int64_t ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
758 ✗ if (ret < 0)
759 ✗ return ret;
760 ✗ wtv->pts = wtv->index_entries[i].timestamp;
761 ✗ return 0;
762 }
763 }
764 ✗ return AVERROR(EIO);
765 }
766
767 /**
768 * Parse WTV chunks
769 * @param mode SEEK_TO_DATA or SEEK_TO_PTS
770 * @param seekts timestamp
771 * @param[out] len_ptr Length of data chunk
772 * @return stream index of data chunk, or <0 on error
773 */
774 321 static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
775 {
776 321 WtvContext *wtv = s->priv_data;
777 321 AVIOContext *pb = wtv->pb;
778 int ret;
779
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 1469 while (!avio_feof(pb)) {
780 ff_asf_guid g;
781 int len, sid, consumed;
782
783 1458 ff_get_guid(pb, &g);
784 1458 len = avio_rl32(pb);
785
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 1458 if (len < 32 || len > INT_MAX - 7) {
786 int ret;
787
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 7 if (avio_feof(pb))
788 310 return AVERROR_EOF;
789 ✗ av_log(s, AV_LOG_WARNING, "encountered broken chunk\n");
790 ✗ if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0)
791 ✗ return ret;
792 ✗ continue;
793 }
794 1451 sid = avio_rl32(pb) & 0x7FFF;
795 1451 avio_skip(pb, 8);
796 1451 consumed = 32;
797
798
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 1451 if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) {
799
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 34 if (ff_find_stream_index(s, sid) < 0) {
800 ff_asf_guid mediatype, subtype, formattype;
801 int size;
802 8 avio_skip(pb, 28);
803 8 ff_get_guid(pb, &mediatype);
804 8 ff_get_guid(pb, &subtype);
805 8 avio_skip(pb, 12);
806 8 ff_get_guid(pb, &formattype);
807 8 size = avio_rl32(pb);
808
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 8 if (size < 0 || size > INT_MAX - 92 - consumed)
809 ✗ return AVERROR_INVALIDDATA;
810 8 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
811 8 consumed += 92 + size;
812 }
813
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 1417 } else if (!ff_guidcmp(g, ff_stream2_guid)) {
814 28 int stream_index = ff_find_stream_index(s, sid);
815
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 28 if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
816 ff_asf_guid mediatype, subtype, formattype;
817 int size;
818 4 avio_skip(pb, 12);
819 4 ff_get_guid(pb, &mediatype);
820 4 ff_get_guid(pb, &subtype);
821 4 avio_skip(pb, 12);
822 4 ff_get_guid(pb, &formattype);
823 4 size = avio_rl32(pb);
824
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 4 if (size < 0 || size > INT_MAX - 76 - consumed)
825 ✗ return AVERROR_INVALIDDATA;
826 4 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
827 4 consumed += 76 + size;
828 }
829
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 2778 } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
830
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 2778 !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
831
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 2778 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
832
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 2775 !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
833
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 2771 !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
834 1389 !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
835 4 int stream_index = ff_find_stream_index(s, sid);
836
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 4 if (stream_index >= 0) {
837 4 AVStream *st = s->streams[stream_index];
838 4 uint8_t buf[258] = {0};
839 4 const uint8_t *pbuf = buf;
840 int buf_size;
841
842 4 avio_skip(pb, 8);
843 4 consumed += 8;
844
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 8 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
845 4 !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
846 ✗ avio_skip(pb, 6);
847 ✗ consumed += 6;
848 }
849
850 4 buf_size = FFMIN(len - consumed, sizeof(buf));
851 4 ret = ffio_read_size(pb, buf, buf_size);
852
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 4 if (ret < 0)
853 ✗ return ret;
854 4 consumed += buf_size;
855 4 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
856 }
857
2/2
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 1385 } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
858 2 int stream_index = ff_find_stream_index(s, sid);
859
1/2
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 2 if (stream_index >= 0) {
860 2 AVStream *st = s->streams[stream_index];
861 int audio_type;
862 2 avio_skip(pb, 8);
863 2 audio_type = avio_r8(pb);
864
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 2 if (audio_type == 2)
865 1 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
866
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 1 else if (audio_type == 3)
867 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
868 2 consumed += 9;
869 }
870
2/2
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✓ Branch 2 taken 1380 times.
 1383 } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
871 3 int stream_index = ff_find_stream_index(s, sid);
872
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 3 if (stream_index >= 0) {
873 3 avio_skip(pb, 12);
874
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 3 if (avio_rl32(pb))
875 ✗ av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
876 3 consumed += 16;
877 }
878
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 1380 } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
879 2 int stream_index = ff_find_stream_index(s, sid);
880
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 2 if (stream_index >= 0) {
881 2 AVStream *st = s->streams[stream_index];
882 uint8_t language[4];
883 2 avio_skip(pb, 12);
884 2 avio_read(pb, language, 3);
885
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 2 if (language[0]) {
886 2 language[3] = 0;
887 2 av_dict_set(&st->metadata, "language", language, 0);
888
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 2 if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
889 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
890 }
891 2 consumed += 15;
892 }
893
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 1378 } else if (!ff_guidcmp(g, ff_timestamp_guid)) {
894 397 int stream_index = ff_find_stream_index(s, sid);
895
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 397 if (stream_index >= 0) {
896 397 avio_skip(pb, 8);
897 397 wtv->pts = avio_rl64(pb);
898 397 consumed += 16;
899
2/2
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 397 if (wtv->pts == -1)
900 45 wtv->pts = AV_NOPTS_VALUE;
901 else {
902 352 wtv->last_valid_pts = wtv->pts;
903
4/4
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 352 if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
904 5 wtv->epoch = wtv->pts;
905
4/4
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✓ Branch 3 taken 102 times.
 352 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
906 5 avio_skip(pb, WTV_PAD8(len) - consumed);
907 5 return 0;
908 }
909 }
910 }
911
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 981 } else if (!ff_guidcmp(g, ff_data_guid)) {
912 400 int stream_index = ff_find_stream_index(s, sid);
913
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 400 if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
914 298 WtvStream *wst = s->streams[stream_index]->priv_data;
915 298 wst->seen_data = 1;
916
2/2
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✓ Branch 1 taken 3 times.
 298 if (len_ptr) {
917 295 *len_ptr = len;
918 }
919 298 return stream_index;
920 }
921
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✓ Branch 2 taken 581 times.
 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})) {
922 ✗ int stream_index = ff_find_stream_index(s, sid);
923 ✗ if (stream_index >= 0)
924 ✗ av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index);
925
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 581 } else if (
926
1/2
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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}) ||
927
2/2
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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}) ||
928
2/2
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✓ Branch 2 taken 133 times.
 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}) ||
929
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 571 !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
930
2/2
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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}) ||
931
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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}) ||
932
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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}) ||
933
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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}) ||
934
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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}) ||
935
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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}) ||
936
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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}) ||
937
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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}) ||
938
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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}) ||
939
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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}) ||
940
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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}) ||
941
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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}) ||
942
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 199 !ff_guidcmp(g, ff_index_guid) ||
943
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 137 !ff_guidcmp(g, ff_sync_guid) ||
944
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 51 !ff_guidcmp(g, ff_stream1_guid) ||
945 ✗ !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
946 //ignore known guids
947 } else
948 ✗ av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
949
950
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 1148 if (avio_feof(pb))
951 ✗ break;
952
953 1148 avio_skip(pb, WTV_PAD8(len) - consumed);
954 }
955 11 return AVERROR_EOF;
956 }
957
958 3 static int read_header(AVFormatContext *s)
959 {
960 3 WtvContext *wtv = s->priv_data;
961 unsigned root_sector;
962 int root_size;
963 uint8_t root[WTV_SECTOR_SIZE];
964 AVIOContext *pb;
965 int64_t timeline_pos;
966 int64_t ret;
967
968 3 wtv->epoch =
969 3 wtv->pts =
970 3 wtv->last_valid_pts = AV_NOPTS_VALUE;
971
972 /* read root directory sector */
973 3 avio_skip(s->pb, 0x30);
974 3 root_size = avio_rl32(s->pb);
975
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 3 if (root_size > sizeof(root)) {
976 ✗ av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
977 ✗ return AVERROR_INVALIDDATA;
978 }
979 3 avio_skip(s->pb, 4);
980 3 root_sector = avio_rl32(s->pb);
981
982 3 ret = seek_by_sector(s->pb, root_sector, 0);
983
1/2
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 3 if (ret < 0)
984 ✗ return ret;
985 3 root_size = avio_read(s->pb, root, root_size);
986
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 3 if (root_size < 0)
987 ✗ return AVERROR_INVALIDDATA;
988
989 /* parse chunks up until first data chunk */
990 3 wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
991
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 3 if (!wtv->pb) {
992 ✗ av_log(s, AV_LOG_ERROR, "timeline data missing\n");
993 ✗ return AVERROR_INVALIDDATA;
994 }
995
996 3 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
997
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 3 if (ret < 0) {
998 ✗ wtvfile_close(wtv->pb);
999 ✗ return ret;
1000 }
1001 3 avio_seek(wtv->pb, -32, SEEK_CUR);
1002
1003 3 timeline_pos = avio_tell(s->pb); // save before opening another file
1004
1005 /* read metadata */
1006 3 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
1007
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 3 if (pb) {
1008 3 parse_legacy_attrib(s, pb);
1009 3 wtvfile_close(pb);
1010 }
1011
1012 3 s->ctx_flags |= AVFMTCTX_NOHEADER; // Needed for noStreams.wtv
1013
1014 /* read seek index */
1015
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 3 if (s->nb_streams) {
1016 3 AVStream *st = s->streams[0];
1017 3 pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
1018
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 3 if (pb) {
1019 316 while(1) {
1020 319 uint64_t timestamp = avio_rl64(pb);
1021 319 uint64_t frame_nb = avio_rl64(pb);
1022
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 319 if (avio_feof(pb))
1023 3 break;
1024 316 ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
1025 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
1026 }
1027 3 wtvfile_close(pb);
1028
1029
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 3 if (wtv->nb_index_entries) {
1030 3 pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
1031
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 3 if (pb) {
1032 3 AVIndexEntry *e = wtv->index_entries;
1033 3 AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1;
1034 3 uint64_t last_position = 0;
1035 207 while (1) {
1036 210 uint64_t frame_nb = avio_rl64(pb);
1037 210 uint64_t position = avio_rl64(pb);
1038
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 519 while (e <= e_end && frame_nb > e->size) {
1039 309 e->pos = last_position;
1040 309 e++;
1041 }
1042
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 210 if (avio_feof(pb))
1043 3 break;
1044 207 last_position = position;
1045 }
1046 3 e_end->pos = last_position;
1047 3 wtvfile_close(pb);
1048 3 st->duration = e_end->timestamp;
1049 }
1050 }
1051 }
1052 }
1053
1054 3 avio_seek(s->pb, timeline_pos, SEEK_SET);
1055 3 return 0;
1056 }
1057
1058 308 static int read_packet(AVFormatContext *s, AVPacket *pkt)
1059 {
1060 308 WtvContext *wtv = s->priv_data;
1061 308 AVIOContext *pb = wtv->pb;
1062 int stream_index, len, ret;
1063
1064 308 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
1065
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 308 if (stream_index < 0)
1066 13 return stream_index;
1067
1068 295 ret = av_get_packet(pb, pkt, len - 32);
1069
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 295 if (ret < 0)
1070 ✗ return ret;
1071 295 pkt->stream_index = stream_index;
1072 295 pkt->pts = wtv->pts;
1073 295 avio_skip(pb, WTV_PAD8(len) - len);
1074 295 return 0;
1075 }
1076
1077 26 static int read_seek(AVFormatContext *s, int stream_index,
1078 int64_t ts, int flags)
1079 {
1080 26 WtvContext *wtv = s->priv_data;
1081 26 AVIOContext *pb = wtv->pb;
1082 26 AVStream *st = s->streams[0];
1083 int64_t ts_relative;
1084 int i;
1085
1086
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 26 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
1087 ✗ return AVERROR(ENOSYS);
1088
1089 /* timestamp adjustment is required because wtv->pts values are absolute,
1090 * whereas AVIndexEntry->timestamp values are relative to epoch. */
1091 26 ts_relative = ts;
1092
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 26 if (wtv->epoch != AV_NOPTS_VALUE)
1093 26 ts_relative -= wtv->epoch;
1094
1095 26 i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
1096
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 26 if (i < 0) {
1097
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 10 if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
1098
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 5 if (avio_seek(pb, 0, SEEK_SET) < 0)
1099 ✗ return -1;
1100
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 5 } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
1101
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 5 if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
1102 ✗ return -1;
1103 }
1104
2/2
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 10 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
1105 5 return AVERROR(ERANGE);
1106 5 return 0;
1107 }
1108
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✓ Branch 2 taken 16 times.
 16 if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
1109 ✗ return -1;
1110 16 wtv->pts = wtv->index_entries[i].timestamp;
1111
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 16 if (wtv->epoch != AV_NOPTS_VALUE)
1112 16 wtv->pts += wtv->epoch;
1113 16 wtv->last_valid_pts = wtv->pts;
1114 16 return 0;
1115 }
1116
1117 3 static int read_close(AVFormatContext *s)
1118 {
1119 3 WtvContext *wtv = s->priv_data;
1120 3 av_freep(&wtv->index_entries);
1121 3 wtvfile_close(wtv->pb);
1122 3 return 0;
1123 }
1124
1125 const FFInputFormat ff_wtv_demuxer = {
1126 .p.name = "wtv",
1127 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
1128 .p.flags = AVFMT_SHOW_IDS,
1129 .priv_data_size = sizeof(WtvContext),
1130 .read_probe = read_probe,
1131 .read_header = read_header,
1132 .read_packet = read_packet,
1133 .read_seek = read_seek,
1134 .read_close = read_close,
1135 };
1136