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2ba45a60 DM |
1 | /* |
2 | * WAV demuxer | |
3 | * Copyright (c) 2001, 2002 Fabrice Bellard | |
4 | * | |
5 | * Sony Wave64 demuxer | |
6 | * RF64 demuxer | |
7 | * Copyright (c) 2009 Daniel Verkamp | |
8 | * | |
9 | * This file is part of FFmpeg. | |
10 | * | |
11 | * FFmpeg is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2.1 of the License, or (at your option) any later version. | |
15 | * | |
16 | * FFmpeg is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with FFmpeg; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <stdint.h> | |
27 | ||
28 | #include "libavutil/avassert.h" | |
29 | #include "libavutil/dict.h" | |
30 | #include "libavutil/intreadwrite.h" | |
31 | #include "libavutil/log.h" | |
32 | #include "libavutil/mathematics.h" | |
33 | #include "libavutil/opt.h" | |
34 | #include "avformat.h" | |
35 | #include "avio.h" | |
36 | #include "avio_internal.h" | |
37 | #include "internal.h" | |
38 | #include "metadata.h" | |
39 | #include "pcm.h" | |
40 | #include "riff.h" | |
41 | #include "w64.h" | |
42 | #include "spdif.h" | |
43 | ||
44 | typedef struct WAVDemuxContext { | |
45 | const AVClass *class; | |
46 | int64_t data_end; | |
47 | int w64; | |
48 | int64_t smv_data_ofs; | |
49 | int smv_block_size; | |
50 | int smv_frames_per_jpeg; | |
51 | int smv_block; | |
52 | int smv_last_stream; | |
53 | int smv_eof; | |
54 | int audio_eof; | |
55 | int ignore_length; | |
56 | int spdif; | |
57 | int smv_cur_pt; | |
58 | int smv_given_first; | |
59 | int unaligned; // e.g. if an odd number of bytes ID3 tag was prepended | |
60 | } WAVDemuxContext; | |
61 | ||
62 | #if CONFIG_WAV_DEMUXER | |
63 | ||
64 | static int64_t next_tag(AVIOContext *pb, uint32_t *tag) | |
65 | { | |
66 | *tag = avio_rl32(pb); | |
67 | return avio_rl32(pb); | |
68 | } | |
69 | ||
70 | /* RIFF chunks are always at even offsets relative to where they start. */ | |
71 | static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence) | |
72 | { | |
73 | offset += offset < INT64_MAX && offset + wav->unaligned & 1; | |
74 | ||
75 | return avio_seek(s, offset, whence); | |
76 | } | |
77 | ||
78 | /* return the size of the found tag */ | |
79 | static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1) | |
80 | { | |
81 | unsigned int tag; | |
82 | int64_t size; | |
83 | ||
84 | for (;;) { | |
85 | if (avio_feof(pb)) | |
86 | return AVERROR_EOF; | |
87 | size = next_tag(pb, &tag); | |
88 | if (tag == tag1) | |
89 | break; | |
90 | wav_seek_tag(wav, pb, size, SEEK_CUR); | |
91 | } | |
92 | return size; | |
93 | } | |
94 | ||
95 | static int wav_probe(AVProbeData *p) | |
96 | { | |
97 | /* check file header */ | |
98 | if (p->buf_size <= 32) | |
99 | return 0; | |
100 | if (!memcmp(p->buf + 8, "WAVE", 4)) { | |
101 | if (!memcmp(p->buf, "RIFF", 4)) | |
102 | /* Since the ACT demuxer has a standard WAV header at the top of | |
103 | * its own, the returned score is decreased to avoid a probe | |
104 | * conflict between ACT and WAV. */ | |
105 | return AVPROBE_SCORE_MAX - 1; | |
106 | else if (!memcmp(p->buf, "RF64", 4) && | |
107 | !memcmp(p->buf + 12, "ds64", 4)) | |
108 | return AVPROBE_SCORE_MAX; | |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static void handle_stream_probing(AVStream *st) | |
114 | { | |
115 | if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) { | |
116 | st->request_probe = AVPROBE_SCORE_EXTENSION; | |
117 | st->probe_packets = FFMIN(st->probe_packets, 14); | |
118 | } | |
119 | } | |
120 | ||
121 | static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st) | |
122 | { | |
123 | AVIOContext *pb = s->pb; | |
124 | int ret; | |
125 | ||
126 | /* parse fmt header */ | |
127 | *st = avformat_new_stream(s, NULL); | |
128 | if (!*st) | |
129 | return AVERROR(ENOMEM); | |
130 | ||
131 | ret = ff_get_wav_header(pb, (*st)->codec, size); | |
132 | if (ret < 0) | |
133 | return ret; | |
134 | handle_stream_probing(*st); | |
135 | ||
136 | (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
137 | ||
138 | avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static inline int wav_parse_bext_string(AVFormatContext *s, const char *key, | |
144 | int length) | |
145 | { | |
146 | char temp[257]; | |
147 | int ret; | |
148 | ||
149 | av_assert0(length <= sizeof(temp)); | |
150 | if ((ret = avio_read(s->pb, temp, length)) < 0) | |
151 | return ret; | |
152 | ||
153 | temp[length] = 0; | |
154 | ||
155 | if (strlen(temp)) | |
156 | return av_dict_set(&s->metadata, key, temp, 0); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int wav_parse_bext_tag(AVFormatContext *s, int64_t size) | |
162 | { | |
163 | char temp[131], *coding_history; | |
164 | int ret, x; | |
165 | uint64_t time_reference; | |
166 | int64_t umid_parts[8], umid_mask = 0; | |
167 | ||
168 | if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 || | |
169 | (ret = wav_parse_bext_string(s, "originator", 32)) < 0 || | |
170 | (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 || | |
171 | (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 || | |
172 | (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0) | |
173 | return ret; | |
174 | ||
175 | time_reference = avio_rl64(s->pb); | |
176 | snprintf(temp, sizeof(temp), "%"PRIu64, time_reference); | |
177 | if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0) | |
178 | return ret; | |
179 | ||
180 | /* check if version is >= 1, in which case an UMID may be present */ | |
181 | if (avio_rl16(s->pb) >= 1) { | |
182 | for (x = 0; x < 8; x++) | |
183 | umid_mask |= umid_parts[x] = avio_rb64(s->pb); | |
184 | ||
185 | if (umid_mask) { | |
186 | /* the string formatting below is per SMPTE 330M-2004 Annex C */ | |
187 | if (umid_parts[4] == 0 && umid_parts[5] == 0 && | |
188 | umid_parts[6] == 0 && umid_parts[7] == 0) { | |
189 | /* basic UMID */ | |
190 | snprintf(temp, sizeof(temp), | |
191 | "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, | |
192 | umid_parts[0], umid_parts[1], | |
193 | umid_parts[2], umid_parts[3]); | |
194 | } else { | |
195 | /* extended UMID */ | |
196 | snprintf(temp, sizeof(temp), | |
197 | "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64 | |
198 | "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, | |
199 | umid_parts[0], umid_parts[1], | |
200 | umid_parts[2], umid_parts[3], | |
201 | umid_parts[4], umid_parts[5], | |
202 | umid_parts[6], umid_parts[7]); | |
203 | } | |
204 | ||
205 | if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0) | |
206 | return ret; | |
207 | } | |
208 | ||
209 | avio_skip(s->pb, 190); | |
210 | } else | |
211 | avio_skip(s->pb, 254); | |
212 | ||
213 | if (size > 602) { | |
214 | /* CodingHistory present */ | |
215 | size -= 602; | |
216 | ||
217 | if (!(coding_history = av_malloc(size + 1))) | |
218 | return AVERROR(ENOMEM); | |
219 | ||
220 | if ((ret = avio_read(s->pb, coding_history, size)) < 0) | |
221 | return ret; | |
222 | ||
223 | coding_history[size] = 0; | |
224 | if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history, | |
225 | AV_DICT_DONT_STRDUP_VAL)) < 0) | |
226 | return ret; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static const AVMetadataConv wav_metadata_conv[] = { | |
233 | { "description", "comment" }, | |
234 | { "originator", "encoded_by" }, | |
235 | { "origination_date", "date" }, | |
236 | { "origination_time", "creation_time" }, | |
237 | { 0 }, | |
238 | }; | |
239 | ||
240 | /* wav input */ | |
241 | static int wav_read_header(AVFormatContext *s) | |
242 | { | |
243 | int64_t size, av_uninit(data_size); | |
244 | int64_t sample_count = 0; | |
245 | int rf64; | |
246 | uint32_t tag; | |
247 | AVIOContext *pb = s->pb; | |
248 | AVStream *st = NULL; | |
249 | WAVDemuxContext *wav = s->priv_data; | |
250 | int ret, got_fmt = 0; | |
251 | int64_t next_tag_ofs, data_ofs = -1; | |
252 | ||
253 | wav->unaligned = avio_tell(s->pb) & 1; | |
254 | ||
255 | wav->smv_data_ofs = -1; | |
256 | ||
257 | /* check RIFF header */ | |
258 | tag = avio_rl32(pb); | |
259 | ||
260 | rf64 = tag == MKTAG('R', 'F', '6', '4'); | |
261 | if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F')) | |
262 | return AVERROR_INVALIDDATA; | |
263 | avio_rl32(pb); /* file size */ | |
264 | tag = avio_rl32(pb); | |
265 | if (tag != MKTAG('W', 'A', 'V', 'E')) | |
266 | return AVERROR_INVALIDDATA; | |
267 | ||
268 | if (rf64) { | |
269 | if (avio_rl32(pb) != MKTAG('d', 's', '6', '4')) | |
270 | return AVERROR_INVALIDDATA; | |
271 | size = avio_rl32(pb); | |
272 | if (size < 24) | |
273 | return AVERROR_INVALIDDATA; | |
274 | avio_rl64(pb); /* RIFF size */ | |
275 | ||
276 | data_size = avio_rl64(pb); | |
277 | sample_count = avio_rl64(pb); | |
278 | ||
279 | if (data_size < 0 || sample_count < 0) { | |
280 | av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in " | |
281 | "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n", | |
282 | data_size, sample_count); | |
283 | return AVERROR_INVALIDDATA; | |
284 | } | |
285 | avio_skip(pb, size - 24); /* skip rest of ds64 chunk */ | |
286 | ||
287 | } | |
288 | ||
289 | for (;;) { | |
290 | AVStream *vst; | |
291 | size = next_tag(pb, &tag); | |
292 | next_tag_ofs = avio_tell(pb) + size; | |
293 | ||
294 | if (avio_feof(pb)) | |
295 | break; | |
296 | ||
297 | switch (tag) { | |
298 | case MKTAG('f', 'm', 't', ' '): | |
299 | /* only parse the first 'fmt ' tag found */ | |
300 | if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) { | |
301 | return ret; | |
302 | } else if (got_fmt) | |
303 | av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n"); | |
304 | ||
305 | got_fmt = 1; | |
306 | break; | |
307 | case MKTAG('d', 'a', 't', 'a'): | |
308 | if (!got_fmt) { | |
309 | av_log(s, AV_LOG_ERROR, | |
310 | "found no 'fmt ' tag before the 'data' tag\n"); | |
311 | return AVERROR_INVALIDDATA; | |
312 | } | |
313 | ||
314 | if (rf64) { | |
315 | next_tag_ofs = wav->data_end = avio_tell(pb) + data_size; | |
316 | } else { | |
317 | data_size = size; | |
318 | next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX; | |
319 | } | |
320 | ||
321 | data_ofs = avio_tell(pb); | |
322 | ||
323 | /* don't look for footer metadata if we can't seek or if we don't | |
324 | * know where the data tag ends | |
325 | */ | |
326 | if (!pb->seekable || (!rf64 && !size)) | |
327 | goto break_loop; | |
328 | break; | |
329 | case MKTAG('f', 'a', 'c', 't'): | |
330 | if (!sample_count) | |
331 | sample_count = avio_rl32(pb); | |
332 | break; | |
333 | case MKTAG('b', 'e', 'x', 't'): | |
334 | if ((ret = wav_parse_bext_tag(s, size)) < 0) | |
335 | return ret; | |
336 | break; | |
337 | case MKTAG('S','M','V','0'): | |
338 | if (!got_fmt) { | |
339 | av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n"); | |
340 | return AVERROR_INVALIDDATA; | |
341 | } | |
342 | // SMV file, a wav file with video appended. | |
343 | if (size != MKTAG('0','2','0','0')) { | |
344 | av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n"); | |
345 | goto break_loop; | |
346 | } | |
347 | av_log(s, AV_LOG_DEBUG, "Found SMV data\n"); | |
348 | wav->smv_given_first = 0; | |
349 | vst = avformat_new_stream(s, NULL); | |
350 | if (!vst) | |
351 | return AVERROR(ENOMEM); | |
352 | avio_r8(pb); | |
353 | vst->id = 1; | |
354 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
355 | vst->codec->codec_id = AV_CODEC_ID_SMVJPEG; | |
356 | vst->codec->width = avio_rl24(pb); | |
357 | vst->codec->height = avio_rl24(pb); | |
358 | if (ff_alloc_extradata(vst->codec, 4)) { | |
359 | av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n"); | |
360 | return AVERROR(ENOMEM); | |
361 | } | |
362 | size = avio_rl24(pb); | |
363 | wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3; | |
364 | avio_rl24(pb); | |
365 | wav->smv_block_size = avio_rl24(pb); | |
366 | avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb)); | |
367 | vst->duration = avio_rl24(pb); | |
368 | avio_rl24(pb); | |
369 | avio_rl24(pb); | |
370 | wav->smv_frames_per_jpeg = avio_rl24(pb); | |
371 | if (wav->smv_frames_per_jpeg > 65536) { | |
372 | av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n"); | |
373 | return AVERROR_INVALIDDATA; | |
374 | } | |
375 | AV_WL32(vst->codec->extradata, wav->smv_frames_per_jpeg); | |
376 | wav->smv_cur_pt = 0; | |
377 | goto break_loop; | |
378 | case MKTAG('L', 'I', 'S', 'T'): | |
379 | if (size < 4) { | |
380 | av_log(s, AV_LOG_ERROR, "too short LIST tag\n"); | |
381 | return AVERROR_INVALIDDATA; | |
382 | } | |
383 | switch (avio_rl32(pb)) { | |
384 | case MKTAG('I', 'N', 'F', 'O'): | |
385 | ff_read_riff_info(s, size - 4); | |
386 | } | |
387 | break; | |
388 | } | |
389 | ||
390 | /* seek to next tag unless we know that we'll run into EOF */ | |
391 | if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) || | |
392 | wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) { | |
393 | break; | |
394 | } | |
395 | } | |
396 | ||
397 | break_loop: | |
398 | if (data_ofs < 0) { | |
399 | av_log(s, AV_LOG_ERROR, "no 'data' tag found\n"); | |
400 | return AVERROR_INVALIDDATA; | |
401 | } | |
402 | ||
403 | avio_seek(pb, data_ofs, SEEK_SET); | |
404 | ||
405 | if ( data_size > 0 && sample_count && st->codec->channels | |
406 | && data_size / sample_count / st->codec->channels > 8) { | |
407 | av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count); | |
408 | sample_count = 0; | |
409 | } | |
410 | ||
411 | if (!sample_count || av_get_exact_bits_per_sample(st->codec->codec_id) > 0) | |
412 | if ( st->codec->channels | |
413 | && data_size | |
414 | && av_get_bits_per_sample(st->codec->codec_id) | |
415 | && wav->data_end <= avio_size(pb)) | |
416 | sample_count = (data_size << 3) | |
417 | / | |
418 | (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id)); | |
419 | ||
420 | if (sample_count) | |
421 | st->duration = sample_count; | |
422 | ||
423 | ff_metadata_conv_ctx(s, NULL, wav_metadata_conv); | |
424 | ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
429 | /** | |
430 | * Find chunk with w64 GUID by skipping over other chunks. | |
431 | * @return the size of the found chunk | |
432 | */ | |
433 | static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16]) | |
434 | { | |
435 | uint8_t guid[16]; | |
436 | int64_t size; | |
437 | ||
438 | while (!avio_feof(pb)) { | |
439 | avio_read(pb, guid, 16); | |
440 | size = avio_rl64(pb); | |
441 | if (size <= 24) | |
442 | return AVERROR_INVALIDDATA; | |
443 | if (!memcmp(guid, guid1, 16)) | |
444 | return size; | |
445 | avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24); | |
446 | } | |
447 | return AVERROR_EOF; | |
448 | } | |
449 | ||
450 | #define MAX_SIZE 4096 | |
451 | ||
452 | static int wav_read_packet(AVFormatContext *s, AVPacket *pkt) | |
453 | { | |
454 | int ret, size; | |
455 | int64_t left; | |
456 | AVStream *st; | |
457 | WAVDemuxContext *wav = s->priv_data; | |
458 | ||
459 | if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 && | |
460 | s->streams[0]->codec->codec_tag == 1) { | |
461 | enum AVCodecID codec; | |
462 | ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer, | |
463 | &codec); | |
464 | if (ret > AVPROBE_SCORE_EXTENSION) { | |
465 | s->streams[0]->codec->codec_id = codec; | |
466 | wav->spdif = 1; | |
467 | } else { | |
468 | wav->spdif = -1; | |
469 | } | |
470 | } | |
471 | if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1) | |
472 | return ff_spdif_read_packet(s, pkt); | |
473 | ||
474 | if (wav->smv_data_ofs > 0) { | |
475 | int64_t audio_dts, video_dts; | |
476 | smv_retry: | |
477 | audio_dts = (int32_t)s->streams[0]->cur_dts; | |
478 | video_dts = (int32_t)s->streams[1]->cur_dts; | |
479 | ||
480 | if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) { | |
481 | /*We always return a video frame first to get the pixel format first*/ | |
482 | wav->smv_last_stream = wav->smv_given_first ? | |
483 | av_compare_ts(video_dts, s->streams[1]->time_base, | |
484 | audio_dts, s->streams[0]->time_base) > 0 : 0; | |
485 | wav->smv_given_first = 1; | |
486 | } | |
487 | wav->smv_last_stream = !wav->smv_last_stream; | |
488 | wav->smv_last_stream |= wav->audio_eof; | |
489 | wav->smv_last_stream &= !wav->smv_eof; | |
490 | if (wav->smv_last_stream) { | |
491 | uint64_t old_pos = avio_tell(s->pb); | |
492 | uint64_t new_pos = wav->smv_data_ofs + | |
493 | wav->smv_block * wav->smv_block_size; | |
494 | if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) { | |
495 | ret = AVERROR_EOF; | |
496 | goto smv_out; | |
497 | } | |
498 | size = avio_rl24(s->pb); | |
499 | ret = av_get_packet(s->pb, pkt, size); | |
500 | if (ret < 0) | |
501 | goto smv_out; | |
502 | pkt->pos -= 3; | |
503 | pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt; | |
504 | wav->smv_cur_pt++; | |
505 | if (wav->smv_frames_per_jpeg > 0) | |
506 | wav->smv_cur_pt %= wav->smv_frames_per_jpeg; | |
507 | if (!wav->smv_cur_pt) | |
508 | wav->smv_block++; | |
509 | ||
510 | pkt->stream_index = 1; | |
511 | smv_out: | |
512 | avio_seek(s->pb, old_pos, SEEK_SET); | |
513 | if (ret == AVERROR_EOF) { | |
514 | wav->smv_eof = 1; | |
515 | goto smv_retry; | |
516 | } | |
517 | return ret; | |
518 | } | |
519 | } | |
520 | ||
521 | st = s->streams[0]; | |
522 | ||
523 | left = wav->data_end - avio_tell(s->pb); | |
524 | if (wav->ignore_length) | |
525 | left = INT_MAX; | |
526 | if (left <= 0) { | |
527 | if (CONFIG_W64_DEMUXER && wav->w64) | |
528 | left = find_guid(s->pb, ff_w64_guid_data) - 24; | |
529 | else | |
530 | left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a')); | |
531 | if (left < 0) { | |
532 | wav->audio_eof = 1; | |
533 | if (wav->smv_data_ofs > 0 && !wav->smv_eof) | |
534 | goto smv_retry; | |
535 | return AVERROR_EOF; | |
536 | } | |
537 | wav->data_end = avio_tell(s->pb) + left; | |
538 | } | |
539 | ||
540 | size = MAX_SIZE; | |
541 | if (st->codec->block_align > 1) { | |
542 | if (size < st->codec->block_align) | |
543 | size = st->codec->block_align; | |
544 | size = (size / st->codec->block_align) * st->codec->block_align; | |
545 | } | |
546 | size = FFMIN(size, left); | |
547 | ret = av_get_packet(s->pb, pkt, size); | |
548 | if (ret < 0) | |
549 | return ret; | |
550 | pkt->stream_index = 0; | |
551 | ||
552 | return ret; | |
553 | } | |
554 | ||
555 | static int wav_read_seek(AVFormatContext *s, | |
556 | int stream_index, int64_t timestamp, int flags) | |
557 | { | |
558 | WAVDemuxContext *wav = s->priv_data; | |
559 | AVStream *st; | |
560 | wav->smv_eof = 0; | |
561 | wav->audio_eof = 0; | |
562 | if (wav->smv_data_ofs > 0) { | |
563 | int64_t smv_timestamp = timestamp; | |
564 | if (stream_index == 0) | |
565 | smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base); | |
566 | else | |
567 | timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base); | |
568 | if (wav->smv_frames_per_jpeg > 0) { | |
569 | wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg; | |
570 | wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg; | |
571 | } | |
572 | } | |
573 | ||
574 | st = s->streams[0]; | |
575 | switch (st->codec->codec_id) { | |
576 | case AV_CODEC_ID_MP2: | |
577 | case AV_CODEC_ID_MP3: | |
578 | case AV_CODEC_ID_AC3: | |
579 | case AV_CODEC_ID_DTS: | |
580 | /* use generic seeking with dynamically generated indexes */ | |
581 | return -1; | |
582 | default: | |
583 | break; | |
584 | } | |
585 | return ff_pcm_read_seek(s, stream_index, timestamp, flags); | |
586 | } | |
587 | ||
588 | #define OFFSET(x) offsetof(WAVDemuxContext, x) | |
589 | #define DEC AV_OPT_FLAG_DECODING_PARAM | |
590 | static const AVOption demux_options[] = { | |
591 | { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC }, | |
592 | { NULL }, | |
593 | }; | |
594 | ||
595 | static const AVClass wav_demuxer_class = { | |
596 | .class_name = "WAV demuxer", | |
597 | .item_name = av_default_item_name, | |
598 | .option = demux_options, | |
599 | .version = LIBAVUTIL_VERSION_INT, | |
600 | }; | |
601 | AVInputFormat ff_wav_demuxer = { | |
602 | .name = "wav", | |
603 | .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"), | |
604 | .priv_data_size = sizeof(WAVDemuxContext), | |
605 | .read_probe = wav_probe, | |
606 | .read_header = wav_read_header, | |
607 | .read_packet = wav_read_packet, | |
608 | .read_seek = wav_read_seek, | |
609 | .flags = AVFMT_GENERIC_INDEX, | |
610 | .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 }, | |
611 | .priv_class = &wav_demuxer_class, | |
612 | }; | |
613 | #endif /* CONFIG_WAV_DEMUXER */ | |
614 | ||
615 | #if CONFIG_W64_DEMUXER | |
616 | static int w64_probe(AVProbeData *p) | |
617 | { | |
618 | if (p->buf_size <= 40) | |
619 | return 0; | |
620 | if (!memcmp(p->buf, ff_w64_guid_riff, 16) && | |
621 | !memcmp(p->buf + 24, ff_w64_guid_wave, 16)) | |
622 | return AVPROBE_SCORE_MAX; | |
623 | else | |
624 | return 0; | |
625 | } | |
626 | ||
627 | static int w64_read_header(AVFormatContext *s) | |
628 | { | |
629 | int64_t size, data_ofs = 0; | |
630 | AVIOContext *pb = s->pb; | |
631 | WAVDemuxContext *wav = s->priv_data; | |
632 | AVStream *st; | |
633 | uint8_t guid[16]; | |
634 | int ret; | |
635 | ||
636 | avio_read(pb, guid, 16); | |
637 | if (memcmp(guid, ff_w64_guid_riff, 16)) | |
638 | return AVERROR_INVALIDDATA; | |
639 | ||
640 | /* riff + wave + fmt + sizes */ | |
641 | if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) | |
642 | return AVERROR_INVALIDDATA; | |
643 | ||
644 | avio_read(pb, guid, 16); | |
645 | if (memcmp(guid, ff_w64_guid_wave, 16)) { | |
646 | av_log(s, AV_LOG_ERROR, "could not find wave guid\n"); | |
647 | return AVERROR_INVALIDDATA; | |
648 | } | |
649 | ||
650 | wav->w64 = 1; | |
651 | ||
652 | st = avformat_new_stream(s, NULL); | |
653 | if (!st) | |
654 | return AVERROR(ENOMEM); | |
655 | ||
656 | while (!avio_feof(pb)) { | |
657 | if (avio_read(pb, guid, 16) != 16) | |
658 | break; | |
659 | size = avio_rl64(pb); | |
660 | if (size <= 24 || INT64_MAX - size < avio_tell(pb)) | |
661 | return AVERROR_INVALIDDATA; | |
662 | ||
663 | if (!memcmp(guid, ff_w64_guid_fmt, 16)) { | |
664 | /* subtract chunk header size - normal wav file doesn't count it */ | |
665 | ret = ff_get_wav_header(pb, st->codec, size - 24); | |
666 | if (ret < 0) | |
667 | return ret; | |
668 | avio_skip(pb, FFALIGN(size, INT64_C(8)) - size); | |
669 | ||
670 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); | |
671 | } else if (!memcmp(guid, ff_w64_guid_fact, 16)) { | |
672 | int64_t samples; | |
673 | ||
674 | samples = avio_rl64(pb); | |
675 | if (samples > 0) | |
676 | st->duration = samples; | |
677 | } else if (!memcmp(guid, ff_w64_guid_data, 16)) { | |
678 | wav->data_end = avio_tell(pb) + size - 24; | |
679 | ||
680 | data_ofs = avio_tell(pb); | |
681 | if (!pb->seekable) | |
682 | break; | |
683 | ||
684 | avio_skip(pb, size - 24); | |
685 | } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) { | |
686 | int64_t start, end, cur; | |
687 | uint32_t count, chunk_size, i; | |
688 | ||
689 | start = avio_tell(pb); | |
690 | end = start + FFALIGN(size, INT64_C(8)) - 24; | |
691 | count = avio_rl32(pb); | |
692 | ||
693 | for (i = 0; i < count; i++) { | |
694 | char chunk_key[5], *value; | |
695 | ||
696 | if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */) | |
697 | break; | |
698 | ||
699 | chunk_key[4] = 0; | |
700 | avio_read(pb, chunk_key, 4); | |
701 | chunk_size = avio_rl32(pb); | |
702 | ||
703 | value = av_mallocz(chunk_size + 1); | |
704 | if (!value) | |
705 | return AVERROR(ENOMEM); | |
706 | ||
707 | ret = avio_get_str16le(pb, chunk_size, value, chunk_size); | |
708 | avio_skip(pb, chunk_size - ret); | |
709 | ||
710 | av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL); | |
711 | } | |
712 | ||
713 | avio_skip(pb, end - avio_tell(pb)); | |
714 | } else { | |
715 | av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid)); | |
716 | avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24); | |
717 | } | |
718 | } | |
719 | ||
720 | if (!data_ofs) | |
721 | return AVERROR_EOF; | |
722 | ||
723 | ff_metadata_conv_ctx(s, NULL, wav_metadata_conv); | |
724 | ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); | |
725 | ||
726 | handle_stream_probing(st); | |
727 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
728 | ||
729 | avio_seek(pb, data_ofs, SEEK_SET); | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | AVInputFormat ff_w64_demuxer = { | |
735 | .name = "w64", | |
736 | .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"), | |
737 | .priv_data_size = sizeof(WAVDemuxContext), | |
738 | .read_probe = w64_probe, | |
739 | .read_header = w64_read_header, | |
740 | .read_packet = wav_read_packet, | |
741 | .read_seek = wav_read_seek, | |
742 | .flags = AVFMT_GENERIC_INDEX, | |
743 | .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 }, | |
744 | }; | |
745 | #endif /* CONFIG_W64_DEMUXER */ |