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path: root/libavformat/wavdec.c (plain)
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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
44typedef 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 int rifx; // RIFX: integer byte order for parameters is big endian
61} WAVDemuxContext;
62
63static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
64{
65 if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codecpar->codec_tag == 1) {
66 enum AVCodecID codec;
67 int len = 1<<16;
68 int ret = ffio_ensure_seekback(s->pb, len);
69
70 if (ret >= 0) {
71 uint8_t *buf = av_malloc(len);
72 if (!buf) {
73 ret = AVERROR(ENOMEM);
74 } else {
75 int64_t pos = avio_tell(s->pb);
76 len = ret = avio_read(s->pb, buf, len);
77 if (len >= 0) {
78 ret = ff_spdif_probe(buf, len, &codec);
79 if (ret > AVPROBE_SCORE_EXTENSION) {
80 s->streams[0]->codecpar->codec_id = codec;
81 wav->spdif = 1;
82 }
83 }
84 avio_seek(s->pb, pos, SEEK_SET);
85 av_free(buf);
86 }
87 }
88
89 if (ret < 0)
90 av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
91 }
92}
93
94#if CONFIG_WAV_DEMUXER
95
96static int64_t next_tag(AVIOContext *pb, uint32_t *tag, int big_endian)
97{
98 *tag = avio_rl32(pb);
99 if (!big_endian) {
100 return avio_rl32(pb);
101 } else {
102 return avio_rb32(pb);
103 }
104}
105
106/* RIFF chunks are always at even offsets relative to where they start. */
107static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence)
108{
109 offset += offset < INT64_MAX && offset + wav->unaligned & 1;
110
111 return avio_seek(s, offset, whence);
112}
113
114/* return the size of the found tag */
115static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1)
116{
117 unsigned int tag;
118 int64_t size;
119
120 for (;;) {
121 if (avio_feof(pb))
122 return AVERROR_EOF;
123 size = next_tag(pb, &tag, wav->rifx);
124 if (tag == tag1)
125 break;
126 wav_seek_tag(wav, pb, size, SEEK_CUR);
127 }
128 return size;
129}
130
131static int wav_probe(AVProbeData *p)
132{
133 /* check file header */
134 if (p->buf_size <= 32)
135 return 0;
136 if (!memcmp(p->buf + 8, "WAVE", 4)) {
137 if (!memcmp(p->buf, "RIFF", 4) || !memcmp(p->buf, "RIFX", 4))
138 /* Since the ACT demuxer has a standard WAV header at the top of
139 * its own, the returned score is decreased to avoid a probe
140 * conflict between ACT and WAV. */
141 return AVPROBE_SCORE_MAX - 1;
142 else if (!memcmp(p->buf, "RF64", 4) &&
143 !memcmp(p->buf + 12, "ds64", 4))
144 return AVPROBE_SCORE_MAX;
145 }
146 return 0;
147}
148
149static void handle_stream_probing(AVStream *st)
150{
151 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
152 st->request_probe = AVPROBE_SCORE_EXTENSION;
153 st->probe_packets = FFMIN(st->probe_packets, 32);
154 }
155}
156
157static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
158{
159 AVIOContext *pb = s->pb;
160 WAVDemuxContext *wav = s->priv_data;
161 int ret;
162
163 /* parse fmt header */
164 *st = avformat_new_stream(s, NULL);
165 if (!*st)
166 return AVERROR(ENOMEM);
167
168 ret = ff_get_wav_header(s, pb, (*st)->codecpar, size, wav->rifx);
169 if (ret < 0)
170 return ret;
171 handle_stream_probing(*st);
172
173 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
174
175 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
176
177 return 0;
178}
179
180static int wav_parse_xma2_tag(AVFormatContext *s, int64_t size, AVStream **st)
181{
182 AVIOContext *pb = s->pb;
183 int num_streams, i, channels = 0;
184
185 if (size < 44)
186 return AVERROR_INVALIDDATA;
187
188 *st = avformat_new_stream(s, NULL);
189 if (!*st)
190 return AVERROR(ENOMEM);
191
192 (*st)->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
193 (*st)->codecpar->codec_id = AV_CODEC_ID_XMA2;
194 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
195
196 avio_skip(pb, 1);
197 num_streams = avio_r8(pb);
198 if (size < 40 + num_streams * 4)
199 return AVERROR_INVALIDDATA;
200 avio_skip(pb, 10);
201 (*st)->codecpar->sample_rate = avio_rb32(pb);
202 avio_skip(pb, 12);
203 (*st)->duration = avio_rb32(pb);
204 avio_skip(pb, 8);
205
206 for (i = 0; i < num_streams; i++) {
207 channels += avio_r8(pb);
208 avio_skip(pb, 3);
209 }
210 (*st)->codecpar->channels = channels;
211
212 if ((*st)->codecpar->channels <= 0 || (*st)->codecpar->sample_rate <= 0)
213 return AVERROR_INVALIDDATA;
214
215 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
216 if (ff_alloc_extradata((*st)->codecpar, 34))
217 return AVERROR(ENOMEM);
218 memset((*st)->codecpar->extradata, 0, 34);
219
220 return 0;
221}
222
223static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
224 int length)
225{
226 char temp[257];
227 int ret;
228
229 av_assert0(length <= sizeof(temp));
230 if ((ret = avio_read(s->pb, temp, length)) < 0)
231 return ret;
232
233 temp[length] = 0;
234
235 if (strlen(temp))
236 return av_dict_set(&s->metadata, key, temp, 0);
237
238 return 0;
239}
240
241static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
242{
243 char temp[131], *coding_history;
244 int ret, x;
245 uint64_t time_reference;
246 int64_t umid_parts[8], umid_mask = 0;
247
248 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
249 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
250 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
251 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
252 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
253 return ret;
254
255 time_reference = avio_rl64(s->pb);
256 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
257 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
258 return ret;
259
260 /* check if version is >= 1, in which case an UMID may be present */
261 if (avio_rl16(s->pb) >= 1) {
262 for (x = 0; x < 8; x++)
263 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
264
265 if (umid_mask) {
266 /* the string formatting below is per SMPTE 330M-2004 Annex C */
267 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
268 umid_parts[6] == 0 && umid_parts[7] == 0) {
269 /* basic UMID */
270 snprintf(temp, sizeof(temp),
271 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
272 umid_parts[0], umid_parts[1],
273 umid_parts[2], umid_parts[3]);
274 } else {
275 /* extended UMID */
276 snprintf(temp, sizeof(temp),
277 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
278 "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
279 umid_parts[0], umid_parts[1],
280 umid_parts[2], umid_parts[3],
281 umid_parts[4], umid_parts[5],
282 umid_parts[6], umid_parts[7]);
283 }
284
285 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
286 return ret;
287 }
288
289 avio_skip(s->pb, 190);
290 } else
291 avio_skip(s->pb, 254);
292
293 if (size > 602) {
294 /* CodingHistory present */
295 size -= 602;
296
297 if (!(coding_history = av_malloc(size + 1)))
298 return AVERROR(ENOMEM);
299
300 if ((ret = avio_read(s->pb, coding_history, size)) < 0)
301 return ret;
302
303 coding_history[size] = 0;
304 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
305 AV_DICT_DONT_STRDUP_VAL)) < 0)
306 return ret;
307 }
308
309 return 0;
310}
311
312static const AVMetadataConv wav_metadata_conv[] = {
313 { "description", "comment" },
314 { "originator", "encoded_by" },
315 { "origination_date", "date" },
316 { "origination_time", "creation_time" },
317 { 0 },
318};
319
320/* wav input */
321static int wav_read_header(AVFormatContext *s)
322{
323 int64_t size, av_uninit(data_size);
324 int64_t sample_count = 0;
325 int rf64 = 0;
326 uint32_t tag;
327 AVIOContext *pb = s->pb;
328 AVStream *st = NULL;
329 WAVDemuxContext *wav = s->priv_data;
330 int ret, got_fmt = 0, got_xma2 = 0;
331 int64_t next_tag_ofs, data_ofs = -1;
332
333 wav->unaligned = avio_tell(s->pb) & 1;
334
335 wav->smv_data_ofs = -1;
336
337 /* read chunk ID */
338 tag = avio_rl32(pb);
339 switch (tag) {
340 case MKTAG('R', 'I', 'F', 'F'):
341 break;
342 case MKTAG('R', 'I', 'F', 'X'):
343 wav->rifx = 1;
344 break;
345 case MKTAG('R', 'F', '6', '4'):
346 rf64 = 1;
347 break;
348 default:
349 av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n",
350 av_fourcc2str(tag));
351 return AVERROR_INVALIDDATA;
352 }
353
354 /* read chunk size */
355 avio_rl32(pb);
356
357 /* read format */
358 if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
359 av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
360 return AVERROR_INVALIDDATA;
361 }
362
363 if (rf64) {
364 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
365 return AVERROR_INVALIDDATA;
366 size = avio_rl32(pb);
367 if (size < 24)
368 return AVERROR_INVALIDDATA;
369 avio_rl64(pb); /* RIFF size */
370
371 data_size = avio_rl64(pb);
372 sample_count = avio_rl64(pb);
373
374 if (data_size < 0 || sample_count < 0) {
375 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
376 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
377 data_size, sample_count);
378 return AVERROR_INVALIDDATA;
379 }
380 avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
381
382 }
383
384 for (;;) {
385 AVStream *vst;
386 size = next_tag(pb, &tag, wav->rifx);
387 next_tag_ofs = avio_tell(pb) + size;
388
389 if (avio_feof(pb))
390 break;
391
392 switch (tag) {
393 case MKTAG('f', 'm', 't', ' '):
394 /* only parse the first 'fmt ' tag found */
395 if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
396 return ret;
397 } else if (got_fmt)
398 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
399
400 got_fmt = 1;
401 break;
402 case MKTAG('X', 'M', 'A', '2'):
403 /* only parse the first 'XMA2' tag found */
404 if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, &st)) < 0) {
405 return ret;
406 } else if (got_xma2)
407 av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
408
409 got_xma2 = 1;
410 break;
411 case MKTAG('d', 'a', 't', 'a'):
412 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) && !got_fmt && !got_xma2) {
413 av_log(s, AV_LOG_ERROR,
414 "found no 'fmt ' tag before the 'data' tag\n");
415 return AVERROR_INVALIDDATA;
416 }
417
418 if (rf64) {
419 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
420 } else if (size != 0xFFFFFFFF) {
421 data_size = size;
422 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
423 } else {
424 av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
425 "file may be invalid\n");
426 data_size = 0;
427 next_tag_ofs = wav->data_end = INT64_MAX;
428 }
429
430 data_ofs = avio_tell(pb);
431
432 /* don't look for footer metadata if we can't seek or if we don't
433 * know where the data tag ends
434 */
435 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!rf64 && !size))
436 goto break_loop;
437 break;
438 case MKTAG('f', 'a', 'c', 't'):
439 if (!sample_count)
440 sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
441 break;
442 case MKTAG('b', 'e', 'x', 't'):
443 if ((ret = wav_parse_bext_tag(s, size)) < 0)
444 return ret;
445 break;
446 case MKTAG('S','M','V','0'):
447 if (!got_fmt) {
448 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
449 return AVERROR_INVALIDDATA;
450 }
451 // SMV file, a wav file with video appended.
452 if (size != MKTAG('0','2','0','0')) {
453 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
454 goto break_loop;
455 }
456 av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
457 wav->smv_given_first = 0;
458 vst = avformat_new_stream(s, NULL);
459 if (!vst)
460 return AVERROR(ENOMEM);
461 avio_r8(pb);
462 vst->id = 1;
463 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
464 vst->codecpar->codec_id = AV_CODEC_ID_SMVJPEG;
465 vst->codecpar->width = avio_rl24(pb);
466 vst->codecpar->height = avio_rl24(pb);
467 if (ff_alloc_extradata(vst->codecpar, 4)) {
468 av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
469 return AVERROR(ENOMEM);
470 }
471 size = avio_rl24(pb);
472 wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
473 avio_rl24(pb);
474 wav->smv_block_size = avio_rl24(pb);
475 avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
476 vst->duration = avio_rl24(pb);
477 avio_rl24(pb);
478 avio_rl24(pb);
479 wav->smv_frames_per_jpeg = avio_rl24(pb);
480 if (wav->smv_frames_per_jpeg > 65536) {
481 av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
482 return AVERROR_INVALIDDATA;
483 }
484 AV_WL32(vst->codecpar->extradata, wav->smv_frames_per_jpeg);
485 wav->smv_cur_pt = 0;
486 goto break_loop;
487 case MKTAG('L', 'I', 'S', 'T'):
488 if (size < 4) {
489 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
490 return AVERROR_INVALIDDATA;
491 }
492 switch (avio_rl32(pb)) {
493 case MKTAG('I', 'N', 'F', 'O'):
494 ff_read_riff_info(s, size - 4);
495 }
496 break;
497 }
498
499 /* seek to next tag unless we know that we'll run into EOF */
500 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
501 wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
502 break;
503 }
504 }
505
506break_loop:
507 if (!got_fmt && !got_xma2) {
508 av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
509 return AVERROR_INVALIDDATA;
510 }
511
512 if (data_ofs < 0) {
513 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
514 return AVERROR_INVALIDDATA;
515 }
516
517 avio_seek(pb, data_ofs, SEEK_SET);
518
519 if (data_size > (INT64_MAX>>3)) {
520 av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
521 data_size = 0;
522 }
523
524 if ( st->codecpar->bit_rate > 0 && data_size > 0
525 && st->codecpar->sample_rate > 0
526 && sample_count > 0 && st->codecpar->channels > 1
527 && sample_count % st->codecpar->channels == 0) {
528 if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
529 sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
530 sample_count /= st->codecpar->channels;
531 }
532
533 if ( data_size > 0 && sample_count && st->codecpar->channels
534 && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
535 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
536 sample_count = 0;
537 }
538
539 /* G.729 hack (for Ticket4577)
540 * FIXME: Come up with cleaner, more general solution */
541 if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
542 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
543 sample_count = 0;
544 }
545
546 if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
547 if ( st->codecpar->channels
548 && data_size
549 && av_get_bits_per_sample(st->codecpar->codec_id)
550 && wav->data_end <= avio_size(pb))
551 sample_count = (data_size << 3)
552 /
553 (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
554
555 if (sample_count)
556 st->duration = sample_count;
557
558 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S32LE &&
559 st->codecpar->block_align == st->codecpar->channels * 4 &&
560 st->codecpar->bits_per_coded_sample == 32 &&
561 st->codecpar->extradata_size == 2 &&
562 AV_RL16(st->codecpar->extradata) == 1) {
563 st->codecpar->codec_id = AV_CODEC_ID_PCM_F16LE;
564 st->codecpar->bits_per_coded_sample = 16;
565 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE &&
566 st->codecpar->block_align == st->codecpar->channels * 4 &&
567 st->codecpar->bits_per_coded_sample == 24) {
568 st->codecpar->codec_id = AV_CODEC_ID_PCM_F24LE;
569 } else if (st->codecpar->codec_id == AV_CODEC_ID_XMA1 ||
570 st->codecpar->codec_id == AV_CODEC_ID_XMA2) {
571 st->codecpar->block_align = 2048;
572 }
573
574 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
575 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
576
577 set_spdif(s, wav);
578
579 return 0;
580}
581
582/**
583 * Find chunk with w64 GUID by skipping over other chunks.
584 * @return the size of the found chunk
585 */
586static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
587{
588 uint8_t guid[16];
589 int64_t size;
590
591 while (!avio_feof(pb)) {
592 avio_read(pb, guid, 16);
593 size = avio_rl64(pb);
594 if (size <= 24)
595 return AVERROR_INVALIDDATA;
596 if (!memcmp(guid, guid1, 16))
597 return size;
598 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
599 }
600 return AVERROR_EOF;
601}
602
603#define MAX_SIZE 4096
604
605static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
606{
607 int ret, size;
608 int64_t left;
609 AVStream *st;
610 WAVDemuxContext *wav = s->priv_data;
611
612 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
613 return ff_spdif_read_packet(s, pkt);
614
615 if (wav->smv_data_ofs > 0) {
616 int64_t audio_dts, video_dts;
617smv_retry:
618 audio_dts = (int32_t)s->streams[0]->cur_dts;
619 video_dts = (int32_t)s->streams[1]->cur_dts;
620
621 if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
622 /*We always return a video frame first to get the pixel format first*/
623 wav->smv_last_stream = wav->smv_given_first ?
624 av_compare_ts(video_dts, s->streams[1]->time_base,
625 audio_dts, s->streams[0]->time_base) > 0 : 0;
626 wav->smv_given_first = 1;
627 }
628 wav->smv_last_stream = !wav->smv_last_stream;
629 wav->smv_last_stream |= wav->audio_eof;
630 wav->smv_last_stream &= !wav->smv_eof;
631 if (wav->smv_last_stream) {
632 uint64_t old_pos = avio_tell(s->pb);
633 uint64_t new_pos = wav->smv_data_ofs +
634 wav->smv_block * wav->smv_block_size;
635 if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
636 ret = AVERROR_EOF;
637 goto smv_out;
638 }
639 size = avio_rl24(s->pb);
640 ret = av_get_packet(s->pb, pkt, size);
641 if (ret < 0)
642 goto smv_out;
643 pkt->pos -= 3;
644 pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt;
645 wav->smv_cur_pt++;
646 if (wav->smv_frames_per_jpeg > 0)
647 wav->smv_cur_pt %= wav->smv_frames_per_jpeg;
648 if (!wav->smv_cur_pt)
649 wav->smv_block++;
650
651 pkt->stream_index = 1;
652smv_out:
653 avio_seek(s->pb, old_pos, SEEK_SET);
654 if (ret == AVERROR_EOF) {
655 wav->smv_eof = 1;
656 goto smv_retry;
657 }
658 return ret;
659 }
660 }
661
662 st = s->streams[0];
663
664 left = wav->data_end - avio_tell(s->pb);
665 if (wav->ignore_length)
666 left = INT_MAX;
667 if (left <= 0) {
668 if (CONFIG_W64_DEMUXER && wav->w64)
669 left = find_guid(s->pb, ff_w64_guid_data) - 24;
670 else
671 left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
672 if (left < 0) {
673 wav->audio_eof = 1;
674 if (wav->smv_data_ofs > 0 && !wav->smv_eof)
675 goto smv_retry;
676 return AVERROR_EOF;
677 }
678 wav->data_end = avio_tell(s->pb) + left;
679 }
680
681 size = MAX_SIZE;
682 if (st->codecpar->block_align > 1) {
683 if (size < st->codecpar->block_align)
684 size = st->codecpar->block_align;
685 size = (size / st->codecpar->block_align) * st->codecpar->block_align;
686 }
687 size = FFMIN(size, left);
688 ret = av_get_packet(s->pb, pkt, size);
689 if (ret < 0)
690 return ret;
691 pkt->stream_index = 0;
692
693 return ret;
694}
695
696static int wav_read_seek(AVFormatContext *s,
697 int stream_index, int64_t timestamp, int flags)
698{
699 WAVDemuxContext *wav = s->priv_data;
700 AVStream *st;
701 wav->smv_eof = 0;
702 wav->audio_eof = 0;
703 if (wav->smv_data_ofs > 0) {
704 int64_t smv_timestamp = timestamp;
705 if (stream_index == 0)
706 smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
707 else
708 timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
709 if (wav->smv_frames_per_jpeg > 0) {
710 wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
711 wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg;
712 }
713 }
714
715 st = s->streams[0];
716 switch (st->codecpar->codec_id) {
717 case AV_CODEC_ID_MP2:
718 case AV_CODEC_ID_MP3:
719 case AV_CODEC_ID_AC3:
720 case AV_CODEC_ID_DTS:
721 case AV_CODEC_ID_XMA2:
722 /* use generic seeking with dynamically generated indexes */
723 return -1;
724 default:
725 break;
726 }
727 return ff_pcm_read_seek(s, stream_index, timestamp, flags);
728}
729
730#define OFFSET(x) offsetof(WAVDemuxContext, x)
731#define DEC AV_OPT_FLAG_DECODING_PARAM
732static const AVOption demux_options[] = {
733 { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
734 { NULL },
735};
736
737static const AVClass wav_demuxer_class = {
738 .class_name = "WAV demuxer",
739 .item_name = av_default_item_name,
740 .option = demux_options,
741 .version = LIBAVUTIL_VERSION_INT,
742};
743AVInputFormat ff_wav_demuxer = {
744 .name = "wav",
745 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
746 .priv_data_size = sizeof(WAVDemuxContext),
747 .read_probe = wav_probe,
748 .read_header = wav_read_header,
749 .read_packet = wav_read_packet,
750 .read_seek = wav_read_seek,
751 .flags = AVFMT_GENERIC_INDEX,
752 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
753 .priv_class = &wav_demuxer_class,
754};
755#endif /* CONFIG_WAV_DEMUXER */
756
757#if CONFIG_W64_DEMUXER
758static int w64_probe(AVProbeData *p)
759{
760 if (p->buf_size <= 40)
761 return 0;
762 if (!memcmp(p->buf, ff_w64_guid_riff, 16) &&
763 !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
764 return AVPROBE_SCORE_MAX;
765 else
766 return 0;
767}
768
769static int w64_read_header(AVFormatContext *s)
770{
771 int64_t size, data_ofs = 0;
772 AVIOContext *pb = s->pb;
773 WAVDemuxContext *wav = s->priv_data;
774 AVStream *st;
775 uint8_t guid[16];
776 int ret;
777
778 avio_read(pb, guid, 16);
779 if (memcmp(guid, ff_w64_guid_riff, 16))
780 return AVERROR_INVALIDDATA;
781
782 /* riff + wave + fmt + sizes */
783 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
784 return AVERROR_INVALIDDATA;
785
786 avio_read(pb, guid, 16);
787 if (memcmp(guid, ff_w64_guid_wave, 16)) {
788 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
789 return AVERROR_INVALIDDATA;
790 }
791
792 wav->w64 = 1;
793
794 st = avformat_new_stream(s, NULL);
795 if (!st)
796 return AVERROR(ENOMEM);
797
798 while (!avio_feof(pb)) {
799 if (avio_read(pb, guid, 16) != 16)
800 break;
801 size = avio_rl64(pb);
802 if (size <= 24 || INT64_MAX - size < avio_tell(pb))
803 return AVERROR_INVALIDDATA;
804
805 if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
806 /* subtract chunk header size - normal wav file doesn't count it */
807 ret = ff_get_wav_header(s, pb, st->codecpar, size - 24, 0);
808 if (ret < 0)
809 return ret;
810 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
811
812 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
813 } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
814 int64_t samples;
815
816 samples = avio_rl64(pb);
817 if (samples > 0)
818 st->duration = samples;
819 } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
820 wav->data_end = avio_tell(pb) + size - 24;
821
822 data_ofs = avio_tell(pb);
823 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
824 break;
825
826 avio_skip(pb, size - 24);
827 } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
828 int64_t start, end, cur;
829 uint32_t count, chunk_size, i;
830
831 start = avio_tell(pb);
832 end = start + FFALIGN(size, INT64_C(8)) - 24;
833 count = avio_rl32(pb);
834
835 for (i = 0; i < count; i++) {
836 char chunk_key[5], *value;
837
838 if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
839 break;
840
841 chunk_key[4] = 0;
842 avio_read(pb, chunk_key, 4);
843 chunk_size = avio_rl32(pb);
844
845 value = av_mallocz(chunk_size + 1);
846 if (!value)
847 return AVERROR(ENOMEM);
848
849 ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
850 avio_skip(pb, chunk_size - ret);
851
852 av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
853 }
854
855 avio_skip(pb, end - avio_tell(pb));
856 } else {
857 av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
858 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
859 }
860 }
861
862 if (!data_ofs)
863 return AVERROR_EOF;
864
865 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
866 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
867
868 handle_stream_probing(st);
869 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
870
871 avio_seek(pb, data_ofs, SEEK_SET);
872
873 set_spdif(s, wav);
874
875 return 0;
876}
877
878AVInputFormat ff_w64_demuxer = {
879 .name = "w64",
880 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
881 .priv_data_size = sizeof(WAVDemuxContext),
882 .read_probe = w64_probe,
883 .read_header = w64_read_header,
884 .read_packet = wav_read_packet,
885 .read_seek = wav_read_seek,
886 .flags = AVFMT_GENERIC_INDEX,
887 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
888};
889#endif /* CONFIG_W64_DEMUXER */
890
generated by cgit at 2024-05-17 05:01:15 (GMT)