3 * Copyright (c) 2001, 2002 Fabrice Bellard
7 * Copyright (c) 2009 Daniel Verkamp
9 * This file is part of FFmpeg.
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.
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.
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
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"
36 #include "avio_internal.h"
44 typedef struct WAVDemuxContext {
50 int smv_frames_per_jpeg;
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
63 static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
65 if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codecpar->codec_tag == 1) {
69 int ret = ffio_ensure_seekback(s->pb, len);
70 int64_t pos = avio_tell(s->pb);
77 ret = AVERROR(ENOMEM);
81 len = ret = avio_read(s->pb, buf, len);
85 ret = ff_spdif_probe(buf, len, &codec);
86 if (ret > AVPROBE_SCORE_EXTENSION) {
87 s->streams[0]->codecpar->codec_id = codec;
91 avio_seek(s->pb, pos, SEEK_SET);
93 av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
98 #if CONFIG_WAV_DEMUXER
100 static int64_t next_tag(AVIOContext *pb, uint32_t *tag, int big_endian)
102 *tag = avio_rl32(pb);
104 return avio_rl32(pb);
106 return avio_rb32(pb);
110 /* RIFF chunks are always at even offsets relative to where they start. */
111 static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence)
113 offset += offset < INT64_MAX && offset + wav->unaligned & 1;
115 return avio_seek(s, offset, whence);
118 /* return the size of the found tag */
119 static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1)
127 size = next_tag(pb, &tag, wav->rifx);
130 wav_seek_tag(wav, pb, size, SEEK_CUR);
135 static int wav_probe(AVProbeData *p)
137 /* check file header */
138 if (p->buf_size <= 32)
140 if (!memcmp(p->buf + 8, "WAVE", 4)) {
141 if (!memcmp(p->buf, "RIFF", 4) || !memcmp(p->buf, "RIFX", 4))
142 /* Since the ACT demuxer has a standard WAV header at the top of
143 * its own, the returned score is decreased to avoid a probe
144 * conflict between ACT and WAV. */
145 return AVPROBE_SCORE_MAX - 1;
146 else if (!memcmp(p->buf, "RF64", 4) &&
147 !memcmp(p->buf + 12, "ds64", 4))
148 return AVPROBE_SCORE_MAX;
153 static void handle_stream_probing(AVStream *st)
155 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
156 st->request_probe = AVPROBE_SCORE_EXTENSION;
157 st->probe_packets = FFMIN(st->probe_packets, 32);
161 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
163 AVIOContext *pb = s->pb;
164 WAVDemuxContext *wav = s->priv_data;
167 /* parse fmt header */
168 *st = avformat_new_stream(s, NULL);
170 return AVERROR(ENOMEM);
172 ret = ff_get_wav_header(s, pb, (*st)->codecpar, size, wav->rifx);
175 handle_stream_probing(*st);
177 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
179 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
184 static int wav_parse_xma2_tag(AVFormatContext *s, int64_t size, AVStream **st)
186 AVIOContext *pb = s->pb;
187 int num_streams, i, channels = 0;
190 return AVERROR_INVALIDDATA;
192 *st = avformat_new_stream(s, NULL);
194 return AVERROR(ENOMEM);
196 (*st)->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
197 (*st)->codecpar->codec_id = AV_CODEC_ID_XMA2;
198 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
201 num_streams = avio_r8(pb);
202 if (size < 40 + num_streams * 4)
203 return AVERROR_INVALIDDATA;
205 (*st)->codecpar->sample_rate = avio_rb32(pb);
207 (*st)->duration = avio_rb32(pb);
210 for (i = 0; i < num_streams; i++) {
211 channels += avio_r8(pb);
214 (*st)->codecpar->channels = channels;
216 if ((*st)->codecpar->channels <= 0 || (*st)->codecpar->sample_rate <= 0)
217 return AVERROR_INVALIDDATA;
219 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
220 if (ff_alloc_extradata((*st)->codecpar, 34))
221 return AVERROR(ENOMEM);
222 memset((*st)->codecpar->extradata, 0, 34);
227 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
233 av_assert0(length <= sizeof(temp));
234 if ((ret = avio_read(s->pb, temp, length)) < 0)
240 return av_dict_set(&s->metadata, key, temp, 0);
245 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
247 char temp[131], *coding_history;
249 uint64_t time_reference;
250 int64_t umid_parts[8], umid_mask = 0;
252 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
253 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
254 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
255 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
256 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
259 time_reference = avio_rl64(s->pb);
260 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
261 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
264 /* check if version is >= 1, in which case an UMID may be present */
265 if (avio_rl16(s->pb) >= 1) {
266 for (x = 0; x < 8; x++)
267 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
270 /* the string formatting below is per SMPTE 330M-2004 Annex C */
271 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
272 umid_parts[6] == 0 && umid_parts[7] == 0) {
274 snprintf(temp, sizeof(temp),
275 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
276 umid_parts[0], umid_parts[1],
277 umid_parts[2], umid_parts[3]);
280 snprintf(temp, sizeof(temp),
281 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
282 "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
283 umid_parts[0], umid_parts[1],
284 umid_parts[2], umid_parts[3],
285 umid_parts[4], umid_parts[5],
286 umid_parts[6], umid_parts[7]);
289 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
293 avio_skip(s->pb, 190);
295 avio_skip(s->pb, 254);
298 /* CodingHistory present */
301 if (!(coding_history = av_malloc(size + 1)))
302 return AVERROR(ENOMEM);
304 if ((ret = avio_read(s->pb, coding_history, size)) < 0)
307 coding_history[size] = 0;
308 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
309 AV_DICT_DONT_STRDUP_VAL)) < 0)
316 static const AVMetadataConv wav_metadata_conv[] = {
317 { "description", "comment" },
318 { "originator", "encoded_by" },
319 { "origination_date", "date" },
320 { "origination_time", "creation_time" },
325 static int wav_read_header(AVFormatContext *s)
327 int64_t size, av_uninit(data_size);
328 int64_t sample_count = 0;
332 AVIOContext *pb = s->pb;
334 WAVDemuxContext *wav = s->priv_data;
335 int ret, got_fmt = 0, got_xma2 = 0;
336 int64_t next_tag_ofs, data_ofs = -1;
338 wav->unaligned = avio_tell(s->pb) & 1;
340 wav->smv_data_ofs = -1;
345 case MKTAG('R', 'I', 'F', 'F'):
347 case MKTAG('R', 'I', 'F', 'X'):
350 case MKTAG('R', 'F', '6', '4'):
354 av_get_codec_tag_string(start_code, sizeof(start_code), tag);
355 av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n", start_code);
356 return AVERROR_INVALIDDATA;
359 /* read chunk size */
363 if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
364 av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
365 return AVERROR_INVALIDDATA;
369 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
370 return AVERROR_INVALIDDATA;
371 size = avio_rl32(pb);
373 return AVERROR_INVALIDDATA;
374 avio_rl64(pb); /* RIFF size */
376 data_size = avio_rl64(pb);
377 sample_count = avio_rl64(pb);
379 if (data_size < 0 || sample_count < 0) {
380 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
381 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
382 data_size, sample_count);
383 return AVERROR_INVALIDDATA;
385 avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
391 size = next_tag(pb, &tag, wav->rifx);
392 next_tag_ofs = avio_tell(pb) + size;
398 case MKTAG('f', 'm', 't', ' '):
399 /* only parse the first 'fmt ' tag found */
400 if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
403 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
407 case MKTAG('X', 'M', 'A', '2'):
408 /* only parse the first 'XMA2' tag found */
409 if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, &st)) < 0) {
412 av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
416 case MKTAG('d', 'a', 't', 'a'):
417 if (!pb->seekable && !got_fmt && !got_xma2) {
418 av_log(s, AV_LOG_ERROR,
419 "found no 'fmt ' tag before the 'data' tag\n");
420 return AVERROR_INVALIDDATA;
424 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
425 } else if (size != 0xFFFFFFFF) {
427 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
429 av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
430 "file may be invalid\n");
432 next_tag_ofs = wav->data_end = INT64_MAX;
435 data_ofs = avio_tell(pb);
437 /* don't look for footer metadata if we can't seek or if we don't
438 * know where the data tag ends
440 if (!pb->seekable || (!rf64 && !size))
443 case MKTAG('f', 'a', 'c', 't'):
445 sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
447 case MKTAG('b', 'e', 'x', 't'):
448 if ((ret = wav_parse_bext_tag(s, size)) < 0)
451 case MKTAG('S','M','V','0'):
453 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
454 return AVERROR_INVALIDDATA;
456 // SMV file, a wav file with video appended.
457 if (size != MKTAG('0','2','0','0')) {
458 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
461 av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
462 wav->smv_given_first = 0;
463 vst = avformat_new_stream(s, NULL);
465 return AVERROR(ENOMEM);
468 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
469 vst->codecpar->codec_id = AV_CODEC_ID_SMVJPEG;
470 vst->codecpar->width = avio_rl24(pb);
471 vst->codecpar->height = avio_rl24(pb);
472 if (ff_alloc_extradata(vst->codecpar, 4)) {
473 av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
474 return AVERROR(ENOMEM);
476 size = avio_rl24(pb);
477 wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
479 wav->smv_block_size = avio_rl24(pb);
480 avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
481 vst->duration = avio_rl24(pb);
484 wav->smv_frames_per_jpeg = avio_rl24(pb);
485 if (wav->smv_frames_per_jpeg > 65536) {
486 av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
487 return AVERROR_INVALIDDATA;
489 AV_WL32(vst->codecpar->extradata, wav->smv_frames_per_jpeg);
492 case MKTAG('L', 'I', 'S', 'T'):
494 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
495 return AVERROR_INVALIDDATA;
497 switch (avio_rl32(pb)) {
498 case MKTAG('I', 'N', 'F', 'O'):
499 ff_read_riff_info(s, size - 4);
504 /* seek to next tag unless we know that we'll run into EOF */
505 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
506 wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
512 if (!got_fmt && !got_xma2) {
513 av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
514 return AVERROR_INVALIDDATA;
518 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
519 return AVERROR_INVALIDDATA;
522 avio_seek(pb, data_ofs, SEEK_SET);
524 if (data_size > (INT64_MAX>>3)) {
525 av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
529 if ( st->codecpar->bit_rate > 0 && data_size > 0
530 && st->codecpar->sample_rate > 0
531 && sample_count > 0 && st->codecpar->channels > 1
532 && sample_count % st->codecpar->channels == 0) {
533 if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
534 sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
535 sample_count /= st->codecpar->channels;
538 if ( data_size > 0 && sample_count && st->codecpar->channels
539 && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
540 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
544 /* G.729 hack (for Ticket4577)
545 * FIXME: Come up with cleaner, more general solution */
546 if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
547 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
551 if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
552 if ( st->codecpar->channels
554 && av_get_bits_per_sample(st->codecpar->codec_id)
555 && wav->data_end <= avio_size(pb))
556 sample_count = (data_size << 3)
558 (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
561 st->duration = sample_count;
563 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
564 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
572 * Find chunk with w64 GUID by skipping over other chunks.
573 * @return the size of the found chunk
575 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
580 while (!avio_feof(pb)) {
581 avio_read(pb, guid, 16);
582 size = avio_rl64(pb);
584 return AVERROR_INVALIDDATA;
585 if (!memcmp(guid, guid1, 16))
587 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
592 #define MAX_SIZE 4096
594 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
599 WAVDemuxContext *wav = s->priv_data;
601 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
602 return ff_spdif_read_packet(s, pkt);
604 if (wav->smv_data_ofs > 0) {
605 int64_t audio_dts, video_dts;
607 audio_dts = (int32_t)s->streams[0]->cur_dts;
608 video_dts = (int32_t)s->streams[1]->cur_dts;
610 if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
611 /*We always return a video frame first to get the pixel format first*/
612 wav->smv_last_stream = wav->smv_given_first ?
613 av_compare_ts(video_dts, s->streams[1]->time_base,
614 audio_dts, s->streams[0]->time_base) > 0 : 0;
615 wav->smv_given_first = 1;
617 wav->smv_last_stream = !wav->smv_last_stream;
618 wav->smv_last_stream |= wav->audio_eof;
619 wav->smv_last_stream &= !wav->smv_eof;
620 if (wav->smv_last_stream) {
621 uint64_t old_pos = avio_tell(s->pb);
622 uint64_t new_pos = wav->smv_data_ofs +
623 wav->smv_block * wav->smv_block_size;
624 if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
628 size = avio_rl24(s->pb);
629 ret = av_get_packet(s->pb, pkt, size);
633 pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt;
635 if (wav->smv_frames_per_jpeg > 0)
636 wav->smv_cur_pt %= wav->smv_frames_per_jpeg;
637 if (!wav->smv_cur_pt)
640 pkt->stream_index = 1;
642 avio_seek(s->pb, old_pos, SEEK_SET);
643 if (ret == AVERROR_EOF) {
653 left = wav->data_end - avio_tell(s->pb);
654 if (wav->ignore_length)
657 if (CONFIG_W64_DEMUXER && wav->w64)
658 left = find_guid(s->pb, ff_w64_guid_data) - 24;
660 left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
663 if (wav->smv_data_ofs > 0 && !wav->smv_eof)
667 wav->data_end = avio_tell(s->pb) + left;
671 if (st->codecpar->block_align > 1) {
672 if (size < st->codecpar->block_align)
673 size = st->codecpar->block_align;
674 size = (size / st->codecpar->block_align) * st->codecpar->block_align;
676 size = FFMIN(size, left);
677 ret = av_get_packet(s->pb, pkt, size);
680 pkt->stream_index = 0;
685 static int wav_read_seek(AVFormatContext *s,
686 int stream_index, int64_t timestamp, int flags)
688 WAVDemuxContext *wav = s->priv_data;
692 if (wav->smv_data_ofs > 0) {
693 int64_t smv_timestamp = timestamp;
694 if (stream_index == 0)
695 smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
697 timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
698 if (wav->smv_frames_per_jpeg > 0) {
699 wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
700 wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg;
705 switch (st->codecpar->codec_id) {
706 case AV_CODEC_ID_MP2:
707 case AV_CODEC_ID_MP3:
708 case AV_CODEC_ID_AC3:
709 case AV_CODEC_ID_DTS:
710 /* use generic seeking with dynamically generated indexes */
715 return ff_pcm_read_seek(s, stream_index, timestamp, flags);
718 #define OFFSET(x) offsetof(WAVDemuxContext, x)
719 #define DEC AV_OPT_FLAG_DECODING_PARAM
720 static const AVOption demux_options[] = {
721 { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
725 static const AVClass wav_demuxer_class = {
726 .class_name = "WAV demuxer",
727 .item_name = av_default_item_name,
728 .option = demux_options,
729 .version = LIBAVUTIL_VERSION_INT,
731 AVInputFormat ff_wav_demuxer = {
733 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
734 .priv_data_size = sizeof(WAVDemuxContext),
735 .read_probe = wav_probe,
736 .read_header = wav_read_header,
737 .read_packet = wav_read_packet,
738 .read_seek = wav_read_seek,
739 .flags = AVFMT_GENERIC_INDEX,
740 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
741 .priv_class = &wav_demuxer_class,
743 #endif /* CONFIG_WAV_DEMUXER */
745 #if CONFIG_W64_DEMUXER
746 static int w64_probe(AVProbeData *p)
748 if (p->buf_size <= 40)
750 if (!memcmp(p->buf, ff_w64_guid_riff, 16) &&
751 !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
752 return AVPROBE_SCORE_MAX;
757 static int w64_read_header(AVFormatContext *s)
759 int64_t size, data_ofs = 0;
760 AVIOContext *pb = s->pb;
761 WAVDemuxContext *wav = s->priv_data;
766 avio_read(pb, guid, 16);
767 if (memcmp(guid, ff_w64_guid_riff, 16))
768 return AVERROR_INVALIDDATA;
770 /* riff + wave + fmt + sizes */
771 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
772 return AVERROR_INVALIDDATA;
774 avio_read(pb, guid, 16);
775 if (memcmp(guid, ff_w64_guid_wave, 16)) {
776 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
777 return AVERROR_INVALIDDATA;
782 st = avformat_new_stream(s, NULL);
784 return AVERROR(ENOMEM);
786 while (!avio_feof(pb)) {
787 if (avio_read(pb, guid, 16) != 16)
789 size = avio_rl64(pb);
790 if (size <= 24 || INT64_MAX - size < avio_tell(pb))
791 return AVERROR_INVALIDDATA;
793 if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
794 /* subtract chunk header size - normal wav file doesn't count it */
795 ret = ff_get_wav_header(s, pb, st->codecpar, size - 24, 0);
798 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
800 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
801 } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
804 samples = avio_rl64(pb);
806 st->duration = samples;
807 } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
808 wav->data_end = avio_tell(pb) + size - 24;
810 data_ofs = avio_tell(pb);
814 avio_skip(pb, size - 24);
815 } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
816 int64_t start, end, cur;
817 uint32_t count, chunk_size, i;
819 start = avio_tell(pb);
820 end = start + FFALIGN(size, INT64_C(8)) - 24;
821 count = avio_rl32(pb);
823 for (i = 0; i < count; i++) {
824 char chunk_key[5], *value;
826 if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
830 avio_read(pb, chunk_key, 4);
831 chunk_size = avio_rl32(pb);
833 value = av_mallocz(chunk_size + 1);
835 return AVERROR(ENOMEM);
837 ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
838 avio_skip(pb, chunk_size - ret);
840 av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
843 avio_skip(pb, end - avio_tell(pb));
845 av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
846 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
853 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
854 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
856 handle_stream_probing(st);
857 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
859 avio_seek(pb, data_ofs, SEEK_SET);
866 AVInputFormat ff_w64_demuxer = {
868 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
869 .priv_data_size = sizeof(WAVDemuxContext),
870 .read_probe = w64_probe,
871 .read_header = w64_read_header,
872 .read_packet = wav_read_packet,
873 .read_seek = wav_read_seek,
874 .flags = AVFMT_GENERIC_INDEX,
875 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
877 #endif /* CONFIG_W64_DEMUXER */