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2ba45a60 DM |
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 | ||
30 | #include "libavutil/channel_layout.h" | |
31 | #include "libavutil/intreadwrite.h" | |
32 | #include "libavutil/intfloat.h" | |
33 | #include "avformat.h" | |
34 | #include "internal.h" | |
35 | #include "wtv.h" | |
36 | #include "mpegts.h" | |
37 | ||
38 | /* Macros for formating GUIDs */ | |
39 | #define PRI_PRETTY_GUID \ | |
40 | "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x" | |
41 | #define ARG_PRETTY_GUID(g) \ | |
42 | AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] | |
43 | #define LEN_PRETTY_GUID 34 | |
44 | ||
45 | /* | |
46 | * | |
47 | * File system routines | |
48 | * | |
49 | */ | |
50 | ||
51 | typedef struct { | |
52 | AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */ | |
53 | ||
54 | int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */ | |
55 | uint32_t *sectors; /**< file allocation table */ | |
56 | int nb_sectors; /**< number of sectors */ | |
57 | ||
58 | int error; | |
59 | int64_t position; | |
60 | int64_t length; | |
61 | } WtvFile; | |
62 | ||
63 | static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset) | |
64 | { | |
65 | return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET); | |
66 | } | |
67 | ||
68 | /** | |
69 | * @return bytes read, 0 on end of file, or <0 on error | |
70 | */ | |
71 | static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size) | |
72 | { | |
73 | WtvFile *wf = opaque; | |
74 | AVIOContext *pb = wf->pb_filesystem; | |
75 | int nread = 0; | |
76 | ||
77 | if (wf->error || pb->error) | |
78 | return -1; | |
79 | if (wf->position >= wf->length || avio_feof(pb)) | |
80 | return 0; | |
81 | ||
82 | buf_size = FFMIN(buf_size, wf->length - wf->position); | |
83 | while(nread < buf_size) { | |
84 | int n; | |
85 | int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1)); | |
86 | int read_request = FFMIN(buf_size - nread, remaining_in_sector); | |
87 | ||
88 | n = avio_read(pb, buf, read_request); | |
89 | if (n <= 0) | |
90 | break; | |
91 | nread += n; | |
92 | buf += n; | |
93 | wf->position += n; | |
94 | if (n == remaining_in_sector) { | |
95 | int i = wf->position >> wf->sector_bits; | |
96 | if (i >= wf->nb_sectors || | |
97 | (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) && | |
98 | seek_by_sector(pb, wf->sectors[i], 0) < 0)) { | |
99 | wf->error = 1; | |
100 | break; | |
101 | } | |
102 | } | |
103 | } | |
104 | return nread; | |
105 | } | |
106 | ||
107 | /** | |
108 | * @return position (or file length) | |
109 | */ | |
110 | static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence) | |
111 | { | |
112 | WtvFile *wf = opaque; | |
113 | AVIOContext *pb = wf->pb_filesystem; | |
114 | ||
115 | if (whence == AVSEEK_SIZE) | |
116 | return wf->length; | |
117 | else if (whence == SEEK_CUR) | |
118 | offset = wf->position + offset; | |
119 | else if (whence == SEEK_END) | |
120 | offset = wf->length; | |
121 | ||
122 | wf->error = offset < 0 || offset >= wf->length || | |
123 | seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits], | |
124 | offset & ((1 << wf->sector_bits) - 1)) < 0; | |
125 | wf->position = offset; | |
126 | return offset; | |
127 | } | |
128 | ||
129 | /** | |
130 | * read non-zero integers (le32) from input stream | |
131 | * @param pb | |
132 | * @param[out] data destination | |
133 | * @param count maximum number of integers to read | |
134 | * @return total number of integers read | |
135 | */ | |
136 | static int read_ints(AVIOContext *pb, uint32_t *data, int count) | |
137 | { | |
138 | int i, total = 0; | |
139 | for (i = 0; i < count; i++) { | |
140 | if ((data[total] = avio_rl32(pb))) | |
141 | total++; | |
142 | } | |
143 | return total; | |
144 | } | |
145 | ||
146 | /** | |
147 | * Open file | |
148 | * @param first_sector First sector | |
149 | * @param length Length of file (bytes) | |
150 | * @param depth File allocation table depth | |
151 | * @return NULL on error | |
152 | */ | |
153 | static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) | |
154 | { | |
155 | AVIOContext *pb; | |
156 | WtvFile *wf; | |
157 | uint8_t *buffer; | |
158 | int64_t size; | |
159 | ||
160 | if (seek_by_sector(s->pb, first_sector, 0) < 0) | |
161 | return NULL; | |
162 | ||
163 | wf = av_mallocz(sizeof(WtvFile)); | |
164 | if (!wf) | |
165 | return NULL; | |
166 | ||
167 | if (depth == 0) { | |
168 | wf->sectors = av_malloc(sizeof(uint32_t)); | |
169 | if (!wf->sectors) { | |
170 | av_free(wf); | |
171 | return NULL; | |
172 | } | |
173 | wf->sectors[0] = first_sector; | |
174 | wf->nb_sectors = 1; | |
175 | } else if (depth == 1) { | |
176 | wf->sectors = av_malloc(WTV_SECTOR_SIZE); | |
177 | if (!wf->sectors) { | |
178 | av_free(wf); | |
179 | return NULL; | |
180 | } | |
181 | wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4); | |
182 | } else if (depth == 2) { | |
183 | uint32_t sectors1[WTV_SECTOR_SIZE / 4]; | |
184 | int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4); | |
185 | int i; | |
186 | ||
187 | wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS); | |
188 | if (!wf->sectors) { | |
189 | av_free(wf); | |
190 | return NULL; | |
191 | } | |
192 | wf->nb_sectors = 0; | |
193 | for (i = 0; i < nb_sectors1; i++) { | |
194 | if (seek_by_sector(s->pb, sectors1[i], 0) < 0) | |
195 | break; | |
196 | wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); | |
197 | } | |
198 | } else { | |
199 | av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth); | |
200 | av_free(wf); | |
201 | return NULL; | |
202 | } | |
203 | wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; | |
204 | ||
205 | if (!wf->nb_sectors) { | |
206 | av_free(wf->sectors); | |
207 | av_free(wf); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | size = avio_size(s->pb); | |
212 | if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size) | |
213 | av_log(s, AV_LOG_WARNING, "truncated file\n"); | |
214 | ||
215 | /* check length */ | |
216 | length &= 0xFFFFFFFFFFFF; | |
217 | if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) { | |
218 | av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits); | |
219 | length = (int64_t)wf->nb_sectors << wf->sector_bits; | |
220 | } | |
221 | wf->length = length; | |
222 | ||
223 | /* seek to initial sector */ | |
224 | wf->position = 0; | |
225 | if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) { | |
226 | av_free(wf->sectors); | |
227 | av_free(wf); | |
228 | return NULL; | |
229 | } | |
230 | ||
231 | wf->pb_filesystem = s->pb; | |
232 | buffer = av_malloc(1 << wf->sector_bits); | |
233 | if (!buffer) { | |
234 | av_free(wf->sectors); | |
235 | av_free(wf); | |
236 | return NULL; | |
237 | } | |
238 | ||
239 | pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, | |
240 | wtvfile_read_packet, NULL, wtvfile_seek); | |
241 | if (!pb) { | |
242 | av_free(buffer); | |
243 | av_free(wf->sectors); | |
244 | av_free(wf); | |
245 | } | |
246 | return pb; | |
247 | } | |
248 | ||
249 | /** | |
250 | * Open file using filename | |
251 | * @param[in] buf directory buffer | |
252 | * @param buf_size directory buffer size | |
253 | * @param[in] filename | |
254 | * @param filename_size size of filename | |
255 | * @return NULL on error | |
256 | */ | |
257 | static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) | |
258 | { | |
259 | const uint8_t *buf_end = buf + buf_size; | |
260 | ||
261 | while(buf + 48 <= buf_end) { | |
262 | int dir_length, name_size, first_sector, depth; | |
263 | uint64_t file_length; | |
264 | const uint8_t *name; | |
265 | if (ff_guidcmp(buf, ff_dir_entry_guid)) { | |
266 | av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; " | |
267 | "remaining directory entries ignored\n", FF_ARG_GUID(buf)); | |
268 | break; | |
269 | } | |
270 | dir_length = AV_RL16(buf + 16); | |
271 | file_length = AV_RL64(buf + 24); | |
272 | name_size = 2 * AV_RL32(buf + 32); | |
273 | if (name_size < 0) { | |
274 | av_log(s, AV_LOG_ERROR, | |
275 | "bad filename length, remaining directory entries ignored\n"); | |
276 | break; | |
277 | } | |
278 | if (48 + (int64_t)name_size > buf_end - buf) { | |
279 | av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n"); | |
280 | break; | |
281 | } | |
282 | first_sector = AV_RL32(buf + 40 + name_size); | |
283 | depth = AV_RL32(buf + 44 + name_size); | |
284 | ||
285 | /* compare file name; test optional null terminator */ | |
286 | name = buf + 40; | |
287 | if (name_size >= filename_size && | |
288 | !memcmp(name, filename, filename_size) && | |
289 | (name_size < filename_size + 2 || !AV_RN16(name + filename_size))) | |
290 | return wtvfile_open_sector(first_sector, file_length, depth, s); | |
291 | ||
292 | buf += dir_length; | |
293 | } | |
294 | return 0; | |
295 | } | |
296 | ||
297 | #define wtvfile_open(s, buf, buf_size, filename) \ | |
298 | wtvfile_open2(s, buf, buf_size, filename, sizeof(filename)) | |
299 | ||
300 | /** | |
301 | * Close file opened with wtvfile_open_sector(), or wtv_open() | |
302 | */ | |
303 | static void wtvfile_close(AVIOContext *pb) | |
304 | { | |
305 | WtvFile *wf = pb->opaque; | |
306 | av_free(wf->sectors); | |
307 | av_freep(&pb->opaque); | |
308 | av_freep(&pb->buffer); | |
309 | av_free(pb); | |
310 | } | |
311 | ||
312 | /* | |
313 | * | |
314 | * Main demuxer | |
315 | * | |
316 | */ | |
317 | ||
318 | typedef struct { | |
319 | int seen_data; | |
320 | } WtvStream; | |
321 | ||
322 | typedef struct { | |
323 | AVIOContext *pb; /**< timeline file */ | |
324 | int64_t epoch; | |
325 | int64_t pts; /**< pts for next data chunk */ | |
326 | int64_t last_valid_pts; /**< latest valid pts, used for interative seeking */ | |
327 | ||
328 | /* maintain private seek index, as the AVIndexEntry->pos is relative to the | |
329 | start of the 'timeline' file, not the file system (AVFormatContext->pb) */ | |
330 | AVIndexEntry *index_entries; | |
331 | int nb_index_entries; | |
332 | unsigned int index_entries_allocated_size; | |
333 | } WtvContext; | |
334 | ||
335 | /* WTV GUIDs */ | |
336 | static const ff_asf_guid EVENTID_SubtitleSpanningEvent = | |
337 | {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; | |
338 | static const ff_asf_guid EVENTID_LanguageSpanningEvent = | |
339 | {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; | |
340 | static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = | |
341 | {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; | |
342 | static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = | |
343 | {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; | |
344 | static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = | |
345 | {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; | |
346 | static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = | |
347 | {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; | |
348 | static const ff_asf_guid EVENTID_StreamIDSpanningEvent = | |
349 | {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; | |
350 | static const ff_asf_guid EVENTID_TeletextSpanningEvent = | |
351 | {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; | |
352 | static const ff_asf_guid EVENTID_AudioTypeSpanningEvent = | |
353 | {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}; | |
354 | ||
355 | /* Windows media GUIDs */ | |
356 | ||
357 | /* Media types */ | |
358 | static const ff_asf_guid mediasubtype_mpeg1payload = | |
359 | {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; | |
360 | static const ff_asf_guid mediatype_mpeg2_sections = | |
361 | {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; | |
362 | static const ff_asf_guid mediatype_mpeg2_pes = | |
363 | {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; | |
364 | static const ff_asf_guid mediatype_mstvcaption = | |
365 | {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; | |
366 | ||
367 | /* Media subtypes */ | |
368 | static const ff_asf_guid mediasubtype_dvb_subtitle = | |
369 | {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; | |
370 | static const ff_asf_guid mediasubtype_teletext = | |
371 | {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; | |
372 | static const ff_asf_guid mediasubtype_dtvccdata = | |
373 | {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; | |
374 | static const ff_asf_guid mediasubtype_mpeg2_sections = | |
375 | {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; | |
376 | ||
377 | static int read_probe(AVProbeData *p) | |
378 | { | |
379 | return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX; | |
380 | } | |
381 | ||
382 | /** | |
383 | * Convert win32 FILETIME to ISO-8601 string | |
384 | * @return <0 on error | |
385 | */ | |
386 | static int filetime_to_iso8601(char *buf, int buf_size, int64_t value) | |
387 | { | |
388 | time_t t = (value / 10000000LL) - 11644473600LL; | |
389 | struct tm *tm = gmtime(&t); | |
390 | if (!tm) | |
391 | return -1; | |
392 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | /** | |
397 | * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string | |
398 | * @return <0 on error | |
399 | */ | |
400 | static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value) | |
401 | { | |
402 | time_t t = (value / 10000000LL) - 719162LL*86400LL; | |
403 | struct tm *tm = gmtime(&t); | |
404 | if (!tm) | |
405 | return -1; | |
406 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | /** | |
411 | * Convert OLE DATE to ISO-8601 string | |
412 | * @return <0 on error | |
413 | */ | |
414 | static int oledate_to_iso8601(char *buf, int buf_size, int64_t value) | |
415 | { | |
416 | time_t t = (av_int2double(value) - 25569.0) * 86400; | |
417 | struct tm *result= gmtime(&t); | |
418 | if (!result) | |
419 | return -1; | |
420 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result); | |
421 | return 0; | |
422 | } | |
423 | ||
424 | static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) | |
425 | { | |
426 | char mime[1024]; | |
427 | char description[1024]; | |
428 | unsigned int filesize; | |
429 | AVStream *st; | |
430 | int ret; | |
431 | int64_t pos = avio_tell(pb); | |
432 | ||
433 | avio_get_str16le(pb, INT_MAX, mime, sizeof(mime)); | |
434 | if (strcmp(mime, "image/jpeg")) | |
435 | goto done; | |
436 | ||
437 | avio_r8(pb); | |
438 | avio_get_str16le(pb, INT_MAX, description, sizeof(description)); | |
439 | filesize = avio_rl32(pb); | |
440 | if (!filesize) | |
441 | goto done; | |
442 | ||
443 | st = avformat_new_stream(s, NULL); | |
444 | if (!st) | |
445 | goto done; | |
446 | av_dict_set(&st->metadata, "title", description, 0); | |
447 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
448 | st->codec->codec_id = AV_CODEC_ID_MJPEG; | |
449 | st->id = -1; | |
450 | ret = av_get_packet(pb, &st->attached_pic, filesize); | |
451 | if (ret < 0) | |
452 | goto done; | |
453 | st->attached_pic.stream_index = st->index; | |
454 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; | |
455 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; | |
456 | done: | |
457 | avio_seek(pb, pos + length, SEEK_SET); | |
458 | } | |
459 | ||
460 | static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) | |
461 | { | |
462 | int buf_size; | |
463 | char *buf; | |
464 | ||
465 | if (!strcmp(key, "WM/MediaThumbType")) { | |
466 | avio_skip(pb, length); | |
467 | return; | |
468 | } | |
469 | ||
470 | buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; | |
471 | buf = av_malloc(buf_size); | |
472 | if (!buf) | |
473 | return; | |
474 | ||
475 | if (type == 0 && length == 4) { | |
476 | snprintf(buf, buf_size, "%u", avio_rl32(pb)); | |
477 | } else if (type == 1) { | |
478 | avio_get_str16le(pb, length, buf, buf_size); | |
479 | if (!strlen(buf)) { | |
480 | av_free(buf); | |
481 | return; | |
482 | } | |
483 | } else if (type == 3 && length == 4) { | |
484 | strcpy(buf, avio_rl32(pb) ? "true" : "false"); | |
485 | } else if (type == 4 && length == 8) { | |
486 | int64_t num = avio_rl64(pb); | |
487 | if (!strcmp(key, "WM/EncodingTime") || | |
488 | !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) { | |
489 | if (filetime_to_iso8601(buf, buf_size, num) < 0) { | |
490 | av_free(buf); | |
491 | return; | |
492 | } | |
493 | } else if (!strcmp(key, "WM/WMRVEncodeTime") || | |
494 | !strcmp(key, "WM/WMRVEndTime")) { | |
495 | if (crazytime_to_iso8601(buf, buf_size, num) < 0) { | |
496 | av_free(buf); | |
497 | return; | |
498 | } | |
499 | } else if (!strcmp(key, "WM/WMRVExpirationDate")) { | |
500 | if (oledate_to_iso8601(buf, buf_size, num) < 0 ) { | |
501 | av_free(buf); | |
502 | return; | |
503 | } | |
504 | } else if (!strcmp(key, "WM/WMRVBitrate")) | |
505 | snprintf(buf, buf_size, "%f", av_int2double(num)); | |
506 | else | |
507 | snprintf(buf, buf_size, "%"PRIi64, num); | |
508 | } else if (type == 5 && length == 2) { | |
509 | snprintf(buf, buf_size, "%u", avio_rl16(pb)); | |
510 | } else if (type == 6 && length == 16) { | |
511 | ff_asf_guid guid; | |
512 | avio_read(pb, guid, 16); | |
513 | snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); | |
514 | } else if (type == 2 && !strcmp(key, "WM/Picture")) { | |
515 | get_attachment(s, pb, length); | |
516 | av_freep(&buf); | |
517 | return; | |
518 | } else { | |
519 | av_freep(&buf); | |
520 | av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length); | |
521 | avio_skip(pb, length); | |
522 | return; | |
523 | } | |
524 | ||
525 | av_dict_set(&s->metadata, key, buf, 0); | |
526 | av_freep(&buf); | |
527 | } | |
528 | ||
529 | /** | |
530 | * Parse metadata entries | |
531 | */ | |
532 | static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) | |
533 | { | |
534 | ff_asf_guid guid; | |
535 | int length, type; | |
536 | while(!avio_feof(pb)) { | |
537 | char key[1024]; | |
538 | ff_get_guid(pb, &guid); | |
539 | type = avio_rl32(pb); | |
540 | length = avio_rl32(pb); | |
541 | if (!length) | |
542 | break; | |
543 | if (ff_guidcmp(&guid, ff_metadata_guid)) { | |
544 | av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; " | |
545 | "remaining metadata entries ignored\n", FF_ARG_GUID(guid)); | |
546 | break; | |
547 | } | |
548 | avio_get_str16le(pb, INT_MAX, key, sizeof(key)); | |
549 | get_tag(s, pb, key, type, length); | |
550 | } | |
551 | ||
552 | ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); | |
553 | } | |
554 | ||
555 | /** | |
556 | * parse VIDEOINFOHEADER2 structure | |
557 | * @return bytes consumed | |
558 | */ | |
559 | static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) | |
560 | { | |
561 | WtvContext *wtv = s->priv_data; | |
562 | AVIOContext *pb = wtv->pb; | |
563 | ||
564 | avio_skip(pb, 72); // picture aspect ratio is unreliable | |
565 | st->codec->codec_tag = ff_get_bmp_header(pb, st, NULL); | |
566 | ||
567 | return 72 + 40; | |
568 | } | |
569 | ||
570 | /** | |
571 | * Parse MPEG1WAVEFORMATEX extradata structure | |
572 | */ | |
573 | static void parse_mpeg1waveformatex(AVStream *st) | |
574 | { | |
575 | /* fwHeadLayer */ | |
576 | switch (AV_RL16(st->codec->extradata)) { | |
577 | case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break; | |
578 | case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break; | |
579 | case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break; | |
580 | } | |
581 | ||
582 | st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ | |
583 | ||
584 | /* dwHeadMode */ | |
585 | switch (AV_RL16(st->codec->extradata + 6)) { | |
586 | case 1 : | |
587 | case 2 : | |
588 | case 4 : st->codec->channels = 2; | |
589 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; | |
590 | break; | |
591 | case 8 : st->codec->channels = 1; | |
592 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; | |
593 | break; | |
594 | } | |
595 | } | |
596 | ||
597 | /** | |
598 | * Initialise stream | |
599 | * @param st Stream to initialise, or NULL to create and initialise new stream | |
600 | * @return NULL on error | |
601 | */ | |
602 | static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) | |
603 | { | |
604 | if (st) { | |
605 | if (st->codec->extradata) { | |
606 | av_freep(&st->codec->extradata); | |
607 | st->codec->extradata_size = 0; | |
608 | } | |
609 | } else { | |
610 | WtvStream *wst = av_mallocz(sizeof(WtvStream)); | |
611 | if (!wst) | |
612 | return NULL; | |
613 | st = avformat_new_stream(s, NULL); | |
614 | if (!st) { | |
615 | av_free(wst); | |
616 | return NULL; | |
617 | } | |
618 | st->id = sid; | |
619 | st->priv_data = wst; | |
620 | } | |
621 | st->codec->codec_type = codec_type; | |
622 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
623 | avpriv_set_pts_info(st, 64, 1, 10000000); | |
624 | return st; | |
625 | } | |
626 | ||
627 | /** | |
628 | * parse Media Type structure and populate stream | |
629 | * @param st Stream, or NULL to create new stream | |
630 | * @param mediatype Mediatype GUID | |
631 | * @param subtype Subtype GUID | |
632 | * @param formattype Format GUID | |
633 | * @param size Size of format buffer | |
634 | * @return NULL on error | |
635 | */ | |
636 | static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, | |
637 | ff_asf_guid mediatype, ff_asf_guid subtype, | |
638 | ff_asf_guid formattype, uint64_t size) | |
639 | { | |
640 | WtvContext *wtv = s->priv_data; | |
641 | AVIOContext *pb = wtv->pb; | |
642 | if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) && | |
643 | !ff_guidcmp(formattype, ff_format_cpfilters_processed)) { | |
644 | ff_asf_guid actual_subtype; | |
645 | ff_asf_guid actual_formattype; | |
646 | ||
647 | if (size < 32) { | |
648 | av_log(s, AV_LOG_WARNING, "format buffer size underflow\n"); | |
649 | avio_skip(pb, size); | |
650 | return NULL; | |
651 | } | |
652 | ||
653 | avio_skip(pb, size - 32); | |
654 | ff_get_guid(pb, &actual_subtype); | |
655 | ff_get_guid(pb, &actual_formattype); | |
656 | avio_seek(pb, -size, SEEK_CUR); | |
657 | ||
658 | st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32); | |
659 | avio_skip(pb, 32); | |
660 | return st; | |
661 | } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) { | |
662 | st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); | |
663 | if (!st) | |
664 | return NULL; | |
665 | if (!ff_guidcmp(formattype, ff_format_waveformatex)) { | |
666 | int ret = ff_get_wav_header(pb, st->codec, size); | |
667 | if (ret < 0) | |
668 | return NULL; | |
669 | } else { | |
670 | if (ff_guidcmp(formattype, ff_format_none)) | |
671 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); | |
672 | avio_skip(pb, size); | |
673 | } | |
674 | ||
675 | if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { | |
676 | st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); | |
677 | } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { | |
678 | if (st->codec->extradata && st->codec->extradata_size >= 22) | |
679 | parse_mpeg1waveformatex(st); | |
680 | else | |
681 | av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n"); | |
682 | } else { | |
683 | st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype); | |
684 | if (st->codec->codec_id == AV_CODEC_ID_NONE) | |
685 | av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); | |
686 | } | |
687 | return st; | |
688 | } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) { | |
689 | st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); | |
690 | if (!st) | |
691 | return NULL; | |
692 | if (!ff_guidcmp(formattype, ff_format_videoinfo2)) { | |
693 | int consumed = parse_videoinfoheader2(s, st); | |
694 | avio_skip(pb, FFMAX(size - consumed, 0)); | |
695 | } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) { | |
696 | uint64_t consumed = parse_videoinfoheader2(s, st); | |
697 | /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */ | |
698 | avio_skip(pb, FFMAX(size - consumed, 0)); | |
699 | } else { | |
700 | if (ff_guidcmp(formattype, ff_format_none)) | |
701 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); | |
702 | avio_skip(pb, size); | |
703 | } | |
704 | ||
705 | if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { | |
706 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); | |
707 | } else { | |
708 | st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype); | |
709 | } | |
710 | if (st->codec->codec_id == AV_CODEC_ID_NONE) | |
711 | av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); | |
712 | return st; | |
713 | } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && | |
714 | !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { | |
715 | st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); | |
716 | if (!st) | |
717 | return NULL; | |
718 | if (ff_guidcmp(formattype, ff_format_none)) | |
719 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); | |
720 | avio_skip(pb, size); | |
721 | st->codec->codec_id = AV_CODEC_ID_DVB_SUBTITLE; | |
722 | return st; | |
723 | } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && | |
724 | (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { | |
725 | st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); | |
726 | if (!st) | |
727 | return NULL; | |
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 | st->codec->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608; | |
732 | return st; | |
733 | } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && | |
734 | !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { | |
735 | if (ff_guidcmp(formattype, ff_format_none)) | |
736 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); | |
737 | avio_skip(pb, size); | |
738 | return NULL; | |
739 | } | |
740 | ||
741 | av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID | |
742 | ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n", | |
743 | FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype)); | |
744 | avio_skip(pb, size); | |
745 | return NULL; | |
746 | } | |
747 | ||
748 | enum { | |
749 | SEEK_TO_DATA = 0, | |
750 | SEEK_TO_PTS, | |
751 | }; | |
752 | ||
753 | /** | |
754 | * Try to seek over a broken chunk | |
755 | * @return <0 on error | |
756 | */ | |
757 | static int recover(WtvContext *wtv, uint64_t broken_pos) | |
758 | { | |
759 | AVIOContext *pb = wtv->pb; | |
760 | int i; | |
761 | for (i = 0; i < wtv->nb_index_entries; i++) { | |
762 | if (wtv->index_entries[i].pos > broken_pos) { | |
763 | int ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); | |
764 | if (ret < 0) | |
765 | return ret; | |
766 | wtv->pts = wtv->index_entries[i].timestamp; | |
767 | return 0; | |
768 | } | |
769 | } | |
770 | return AVERROR(EIO); | |
771 | } | |
772 | ||
773 | /** | |
774 | * Parse WTV chunks | |
775 | * @param mode SEEK_TO_DATA or SEEK_TO_PTS | |
776 | * @param seekts timestamp | |
777 | * @param[out] len_ptr Length of data chunk | |
778 | * @return stream index of data chunk, or <0 on error | |
779 | */ | |
780 | static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) | |
781 | { | |
782 | WtvContext *wtv = s->priv_data; | |
783 | AVIOContext *pb = wtv->pb; | |
784 | while (!avio_feof(pb)) { | |
785 | ff_asf_guid g; | |
786 | int len, sid, consumed; | |
787 | ||
788 | ff_get_guid(pb, &g); | |
789 | len = avio_rl32(pb); | |
790 | if (len < 32) { | |
791 | int ret; | |
792 | if (avio_feof(pb)) | |
793 | return AVERROR_EOF; | |
794 | av_log(s, AV_LOG_WARNING, "encountered broken chunk\n"); | |
795 | if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0) | |
796 | return ret; | |
797 | continue; | |
798 | } | |
799 | sid = avio_rl32(pb) & 0x7FFF; | |
800 | avio_skip(pb, 8); | |
801 | consumed = 32; | |
802 | ||
803 | if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) { | |
804 | if (ff_find_stream_index(s, sid) < 0) { | |
805 | ff_asf_guid mediatype, subtype, formattype; | |
806 | int size; | |
807 | avio_skip(pb, 28); | |
808 | ff_get_guid(pb, &mediatype); | |
809 | ff_get_guid(pb, &subtype); | |
810 | avio_skip(pb, 12); | |
811 | ff_get_guid(pb, &formattype); | |
812 | size = avio_rl32(pb); | |
813 | parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); | |
814 | consumed += 92 + size; | |
815 | } | |
816 | } else if (!ff_guidcmp(g, ff_stream2_guid)) { | |
817 | int stream_index = ff_find_stream_index(s, sid); | |
818 | if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { | |
819 | ff_asf_guid mediatype, subtype, formattype; | |
820 | int size; | |
821 | avio_skip(pb, 12); | |
822 | ff_get_guid(pb, &mediatype); | |
823 | ff_get_guid(pb, &subtype); | |
824 | avio_skip(pb, 12); | |
825 | ff_get_guid(pb, &formattype); | |
826 | size = avio_rl32(pb); | |
827 | parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); | |
828 | consumed += 76 + size; | |
829 | } | |
830 | } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || | |
831 | !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || | |
832 | !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || | |
833 | !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || | |
834 | !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || | |
835 | !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { | |
836 | int stream_index = ff_find_stream_index(s, sid); | |
837 | if (stream_index >= 0) { | |
838 | AVStream *st = s->streams[stream_index]; | |
839 | uint8_t buf[258]; | |
840 | const uint8_t *pbuf = buf; | |
841 | int buf_size; | |
842 | ||
843 | avio_skip(pb, 8); | |
844 | consumed += 8; | |
845 | if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || | |
846 | !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { | |
847 | avio_skip(pb, 6); | |
848 | consumed += 6; | |
849 | } | |
850 | ||
851 | buf_size = FFMIN(len - consumed, sizeof(buf)); | |
852 | avio_read(pb, buf, buf_size); | |
853 | consumed += buf_size; | |
854 | ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL); | |
855 | } | |
856 | } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { | |
857 | int stream_index = ff_find_stream_index(s, sid); | |
858 | if (stream_index >= 0) { | |
859 | AVStream *st = s->streams[stream_index]; | |
860 | int audio_type; | |
861 | avio_skip(pb, 8); | |
862 | audio_type = avio_r8(pb); | |
863 | if (audio_type == 2) | |
864 | st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; | |
865 | else if (audio_type == 3) | |
866 | st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; | |
867 | consumed += 9; | |
868 | } | |
869 | } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { | |
870 | int stream_index = ff_find_stream_index(s, sid); | |
871 | if (stream_index >= 0) { | |
872 | avio_skip(pb, 12); | |
873 | if (avio_rl32(pb)) | |
874 | av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index); | |
875 | consumed += 16; | |
876 | } | |
877 | } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { | |
878 | int stream_index = ff_find_stream_index(s, sid); | |
879 | if (stream_index >= 0) { | |
880 | AVStream *st = s->streams[stream_index]; | |
881 | uint8_t language[4]; | |
882 | avio_skip(pb, 12); | |
883 | avio_read(pb, language, 3); | |
884 | if (language[0]) { | |
885 | language[3] = 0; | |
886 | av_dict_set(&st->metadata, "language", language, 0); | |
887 | if (!strcmp(language, "nar") || !strcmp(language, "NAR")) | |
888 | st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; | |
889 | } | |
890 | consumed += 15; | |
891 | } | |
892 | } else if (!ff_guidcmp(g, ff_timestamp_guid)) { | |
893 | int stream_index = ff_find_stream_index(s, sid); | |
894 | if (stream_index >= 0) { | |
895 | avio_skip(pb, 8); | |
896 | wtv->pts = avio_rl64(pb); | |
897 | consumed += 16; | |
898 | if (wtv->pts == -1) | |
899 | wtv->pts = AV_NOPTS_VALUE; | |
900 | else { | |
901 | wtv->last_valid_pts = wtv->pts; | |
902 | if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch) | |
903 | wtv->epoch = wtv->pts; | |
904 | if (mode == SEEK_TO_PTS && wtv->pts >= seekts) { | |
905 | avio_skip(pb, WTV_PAD8(len) - consumed); | |
906 | return 0; | |
907 | } | |
908 | } | |
909 | } | |
910 | } else if (!ff_guidcmp(g, ff_data_guid)) { | |
911 | int stream_index = ff_find_stream_index(s, sid); | |
912 | if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) { | |
913 | WtvStream *wst = s->streams[stream_index]->priv_data; | |
914 | wst->seen_data = 1; | |
915 | if (len_ptr) { | |
916 | *len_ptr = len; | |
917 | } | |
918 | return stream_index; | |
919 | } | |
920 | } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) { | |
921 | int stream_index = ff_find_stream_index(s, sid); | |
922 | if (stream_index >= 0) | |
923 | av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index); | |
924 | } else if ( | |
925 | !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) || | |
926 | !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) || | |
927 | !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) || | |
928 | !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) || | |
929 | !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) || | |
930 | !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) || | |
931 | !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) || | |
932 | !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) || | |
933 | !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) || | |
934 | !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) || | |
935 | !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) || | |
936 | !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || | |
937 | !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || | |
938 | !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || | |
939 | !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || | |
940 | !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || | |
941 | !ff_guidcmp(g, ff_index_guid) || | |
942 | !ff_guidcmp(g, ff_sync_guid) || | |
943 | !ff_guidcmp(g, ff_stream1_guid) || | |
944 | !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) { | |
945 | //ignore known guids | |
946 | } else | |
947 | av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g)); | |
948 | ||
949 | avio_skip(pb, WTV_PAD8(len) - consumed); | |
950 | } | |
951 | return AVERROR_EOF; | |
952 | } | |
953 | ||
954 | static int read_header(AVFormatContext *s) | |
955 | { | |
956 | WtvContext *wtv = s->priv_data; | |
957 | int root_sector, root_size; | |
958 | uint8_t root[WTV_SECTOR_SIZE]; | |
959 | AVIOContext *pb; | |
960 | int64_t timeline_pos; | |
961 | int ret; | |
962 | ||
963 | wtv->epoch = | |
964 | wtv->pts = | |
965 | wtv->last_valid_pts = AV_NOPTS_VALUE; | |
966 | ||
967 | /* read root directory sector */ | |
968 | avio_skip(s->pb, 0x30); | |
969 | root_size = avio_rl32(s->pb); | |
970 | if (root_size > sizeof(root)) { | |
971 | av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n"); | |
972 | return AVERROR_INVALIDDATA; | |
973 | } | |
974 | avio_skip(s->pb, 4); | |
975 | root_sector = avio_rl32(s->pb); | |
976 | ||
977 | seek_by_sector(s->pb, root_sector, 0); | |
978 | root_size = avio_read(s->pb, root, root_size); | |
979 | if (root_size < 0) | |
980 | return AVERROR_INVALIDDATA; | |
981 | ||
982 | /* parse chunks up until first data chunk */ | |
983 | wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16); | |
984 | if (!wtv->pb) { | |
985 | av_log(s, AV_LOG_ERROR, "timeline data missing\n"); | |
986 | return AVERROR_INVALIDDATA; | |
987 | } | |
988 | ||
989 | ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); | |
990 | if (ret < 0) | |
991 | return ret; | |
992 | avio_seek(wtv->pb, -32, SEEK_CUR); | |
993 | ||
994 | timeline_pos = avio_tell(s->pb); // save before opening another file | |
995 | ||
996 | /* read metadata */ | |
997 | pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16); | |
998 | if (pb) { | |
999 | parse_legacy_attrib(s, pb); | |
1000 | wtvfile_close(pb); | |
1001 | } | |
1002 | ||
1003 | /* read seek index */ | |
1004 | if (s->nb_streams) { | |
1005 | AVStream *st = s->streams[0]; | |
1006 | pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16); | |
1007 | if (pb) { | |
1008 | while(1) { | |
1009 | uint64_t timestamp = avio_rl64(pb); | |
1010 | uint64_t frame_nb = avio_rl64(pb); | |
1011 | if (avio_feof(pb)) | |
1012 | break; | |
1013 | ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, | |
1014 | 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); | |
1015 | } | |
1016 | wtvfile_close(pb); | |
1017 | ||
1018 | if (wtv->nb_index_entries) { | |
1019 | pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16); | |
1020 | if (pb) { | |
1021 | int i; | |
1022 | while (1) { | |
1023 | uint64_t frame_nb = avio_rl64(pb); | |
1024 | uint64_t position = avio_rl64(pb); | |
1025 | if (avio_feof(pb)) | |
1026 | break; | |
1027 | for (i = wtv->nb_index_entries - 1; i >= 0; i--) { | |
1028 | AVIndexEntry *e = wtv->index_entries + i; | |
1029 | if (frame_nb > e->size) | |
1030 | break; | |
1031 | if (position > e->pos) | |
1032 | e->pos = position; | |
1033 | } | |
1034 | } | |
1035 | wtvfile_close(pb); | |
1036 | st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp; | |
1037 | } | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | avio_seek(s->pb, timeline_pos, SEEK_SET); | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int read_packet(AVFormatContext *s, AVPacket *pkt) | |
1047 | { | |
1048 | WtvContext *wtv = s->priv_data; | |
1049 | AVIOContext *pb = wtv->pb; | |
1050 | int stream_index, len, ret; | |
1051 | ||
1052 | stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len); | |
1053 | if (stream_index < 0) | |
1054 | return stream_index; | |
1055 | ||
1056 | ret = av_get_packet(pb, pkt, len - 32); | |
1057 | if (ret < 0) | |
1058 | return ret; | |
1059 | pkt->stream_index = stream_index; | |
1060 | pkt->pts = wtv->pts; | |
1061 | avio_skip(pb, WTV_PAD8(len) - len); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static int read_seek(AVFormatContext *s, int stream_index, | |
1066 | int64_t ts, int flags) | |
1067 | { | |
1068 | WtvContext *wtv = s->priv_data; | |
1069 | AVIOContext *pb = wtv->pb; | |
1070 | AVStream *st = s->streams[0]; | |
1071 | int64_t ts_relative; | |
1072 | int i; | |
1073 | ||
1074 | if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) | |
1075 | return AVERROR(ENOSYS); | |
1076 | ||
1077 | /* timestamp adjustment is required because wtv->pts values are absolute, | |
1078 | * whereas AVIndexEntry->timestamp values are relative to epoch. */ | |
1079 | ts_relative = ts; | |
1080 | if (wtv->epoch != AV_NOPTS_VALUE) | |
1081 | ts_relative -= wtv->epoch; | |
1082 | ||
1083 | i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); | |
1084 | if (i < 0) { | |
1085 | if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) { | |
1086 | if (avio_seek(pb, 0, SEEK_SET) < 0) | |
1087 | return -1; | |
1088 | } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) { | |
1089 | if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0) | |
1090 | return -1; | |
1091 | } | |
1092 | if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) | |
1093 | return AVERROR(ERANGE); | |
1094 | return 0; | |
1095 | } | |
1096 | if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0) | |
1097 | return -1; | |
1098 | wtv->pts = wtv->index_entries[i].timestamp; | |
1099 | if (wtv->epoch != AV_NOPTS_VALUE) | |
1100 | wtv->pts += wtv->epoch; | |
1101 | wtv->last_valid_pts = wtv->pts; | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static int read_close(AVFormatContext *s) | |
1106 | { | |
1107 | WtvContext *wtv = s->priv_data; | |
1108 | av_freep(&wtv->index_entries); | |
1109 | wtvfile_close(wtv->pb); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | AVInputFormat ff_wtv_demuxer = { | |
1114 | .name = "wtv", | |
1115 | .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"), | |
1116 | .priv_data_size = sizeof(WtvContext), | |
1117 | .read_probe = read_probe, | |
1118 | .read_header = read_header, | |
1119 | .read_packet = read_packet, | |
1120 | .read_seek = read_seek, | |
1121 | .read_close = read_close, | |
1122 | .flags = AVFMT_SHOW_IDS, | |
1123 | }; |