3 * Copyright (c) 2001, 2002 Fabrice Bellard
7 * Copyright (c) 2009 Daniel Verkamp
11 * This file is part of FFmpeg.
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31 #include "libavutil/avassert.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/log.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/opt.h"
39 #include "avio_internal.h"
48 typedef struct WAVDemuxContext {
55 int smv_frames_per_jpeg;
64 int unaligned; // e.g. if an odd number of bytes ID3 tag was prepended
65 int rifx; // RIFX: integer byte order for parameters is big endian
68 #define OFFSET(x) offsetof(WAVDemuxContext, x)
69 #define DEC AV_OPT_FLAG_DECODING_PARAM
70 static const AVOption demux_options[] = {
71 #define W64_DEMUXER_OPTIONS_OFFSET (1 * CONFIG_WAV_DEMUXER)
72 #if CONFIG_WAV_DEMUXER
73 { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
75 { "max_size", "max size of single packet", OFFSET(max_size), AV_OPT_TYPE_INT, { .i64 = 4096 }, 1024, 1 << 22, DEC },
79 static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
81 if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codecpar->codec_tag == 1) {
84 int ret = ffio_ensure_seekback(s->pb, len);
87 uint8_t *buf = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE);
89 ret = AVERROR(ENOMEM);
91 int64_t pos = avio_tell(s->pb);
92 len = ret = avio_read(s->pb, buf, len);
94 ret = ff_spdif_probe(buf, len, &codec);
95 if (ret > AVPROBE_SCORE_EXTENSION) {
96 s->streams[0]->codecpar->codec_id = codec;
100 avio_seek(s->pb, pos, SEEK_SET);
106 av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
110 #if CONFIG_WAV_DEMUXER
112 static int64_t next_tag(AVIOContext *pb, uint32_t *tag, int big_endian)
114 *tag = avio_rl32(pb);
116 return avio_rl32(pb);
118 return avio_rb32(pb);
122 /* RIFF chunks are always at even offsets relative to where they start. */
123 static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence)
125 offset += offset < INT64_MAX && offset + wav->unaligned & 1;
127 return avio_seek(s, offset, whence);
130 /* return the size of the found tag */
131 static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1)
139 size = next_tag(pb, &tag, wav->rifx);
142 wav_seek_tag(wav, pb, size, SEEK_CUR);
147 static int wav_probe(const AVProbeData *p)
149 /* check file header */
150 if (p->buf_size <= 32)
152 if (!memcmp(p->buf + 8, "WAVE", 4)) {
153 if (!memcmp(p->buf, "RIFF", 4) || !memcmp(p->buf, "RIFX", 4))
154 /* Since the ACT demuxer has a standard WAV header at the top of
155 * its own, the returned score is decreased to avoid a probe
156 * conflict between ACT and WAV. */
157 return AVPROBE_SCORE_MAX - 1;
158 else if ((!memcmp(p->buf, "RF64", 4) ||
159 !memcmp(p->buf, "BW64", 4)) &&
160 !memcmp(p->buf + 12, "ds64", 4))
161 return AVPROBE_SCORE_MAX;
166 static void handle_stream_probing(AVStream *st)
168 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
169 st->internal->request_probe = AVPROBE_SCORE_EXTENSION;
170 st->probe_packets = FFMIN(st->probe_packets, 32);
174 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream *st)
176 AVIOContext *pb = s->pb;
177 WAVDemuxContext *wav = s->priv_data;
180 /* parse fmt header */
181 ret = ff_get_wav_header(s, pb, st->codecpar, size, wav->rifx);
184 handle_stream_probing(st);
186 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
188 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
193 static int wav_parse_xma2_tag(AVFormatContext *s, int64_t size, AVStream *st)
195 AVIOContext *pb = s->pb;
196 int version, num_streams, i, channels = 0, ret;
199 return AVERROR_INVALIDDATA;
201 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
202 st->codecpar->codec_id = AV_CODEC_ID_XMA2;
203 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
205 version = avio_r8(pb);
206 if (version != 3 && version != 4)
207 return AVERROR_INVALIDDATA;
208 num_streams = avio_r8(pb);
209 if (size != (32 + ((version==3)?0:8) + 4*num_streams))
210 return AVERROR_INVALIDDATA;
212 st->codecpar->sample_rate = avio_rb32(pb);
216 st->duration = avio_rb32(pb);
219 for (i = 0; i < num_streams; i++) {
220 channels += avio_r8(pb);
223 st->codecpar->channels = channels;
225 if (st->codecpar->channels <= 0 || st->codecpar->sample_rate <= 0)
226 return AVERROR_INVALIDDATA;
228 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
230 avio_seek(pb, -size, SEEK_CUR);
231 if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0)
237 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
243 av_assert0(length < sizeof(temp));
244 if ((ret = avio_read(s->pb, temp, length)) != length)
245 return ret < 0 ? ret : AVERROR_INVALIDDATA;
250 return av_dict_set(&s->metadata, key, temp, 0);
255 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
257 char temp[131], *coding_history;
259 uint64_t time_reference;
260 int64_t umid_parts[8], umid_mask = 0;
262 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
263 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
264 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
265 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
266 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
269 time_reference = avio_rl64(s->pb);
270 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
271 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
274 /* check if version is >= 1, in which case an UMID may be present */
275 if (avio_rl16(s->pb) >= 1) {
276 for (x = 0; x < 8; x++)
277 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
280 /* the string formatting below is per SMPTE 330M-2004 Annex C */
281 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
282 umid_parts[6] == 0 && umid_parts[7] == 0) {
284 snprintf(temp, sizeof(temp),
285 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
286 umid_parts[0], umid_parts[1],
287 umid_parts[2], umid_parts[3]);
290 snprintf(temp, sizeof(temp),
291 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
292 "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
293 umid_parts[0], umid_parts[1],
294 umid_parts[2], umid_parts[3],
295 umid_parts[4], umid_parts[5],
296 umid_parts[6], umid_parts[7]);
299 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
303 avio_skip(s->pb, 190);
305 avio_skip(s->pb, 254);
308 /* CodingHistory present */
311 if (!(coding_history = av_malloc(size + 1)))
312 return AVERROR(ENOMEM);
314 if ((ret = avio_read(s->pb, coding_history, size)) != size) {
315 av_free(coding_history);
316 return ret < 0 ? ret : AVERROR_INVALIDDATA;
319 coding_history[size] = 0;
320 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
321 AV_DICT_DONT_STRDUP_VAL)) < 0)
328 static const AVMetadataConv wav_metadata_conv[] = {
329 { "description", "comment" },
330 { "originator", "encoded_by" },
331 { "origination_date", "date" },
332 { "origination_time", "creation_time" },
337 static int wav_read_header(AVFormatContext *s)
339 int64_t size, av_uninit(data_size);
340 int64_t sample_count = 0;
341 int rf64 = 0, bw64 = 0;
343 AVIOContext *pb = s->pb;
345 WAVDemuxContext *wav = s->priv_data;
346 int ret, got_fmt = 0, got_xma2 = 0;
347 int64_t next_tag_ofs, data_ofs = -1;
349 wav->unaligned = avio_tell(s->pb) & 1;
351 wav->smv_data_ofs = -1;
356 case MKTAG('R', 'I', 'F', 'F'):
358 case MKTAG('R', 'I', 'F', 'X'):
361 case MKTAG('R', 'F', '6', '4'):
364 case MKTAG('B', 'W', '6', '4'):
368 av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n",
370 return AVERROR_INVALIDDATA;
373 /* read chunk size */
377 if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
378 av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
379 return AVERROR_INVALIDDATA;
383 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
384 return AVERROR_INVALIDDATA;
385 size = avio_rl32(pb);
387 return AVERROR_INVALIDDATA;
388 avio_rl64(pb); /* RIFF size */
390 data_size = avio_rl64(pb);
391 sample_count = avio_rl64(pb);
393 if (data_size < 0 || sample_count < 0) {
394 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
395 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
396 data_size, sample_count);
397 return AVERROR_INVALIDDATA;
399 avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
403 /* Create the audio stream now so that its index is always zero */
404 st = avformat_new_stream(s, NULL);
406 return AVERROR(ENOMEM);
410 size = next_tag(pb, &tag, wav->rifx);
411 next_tag_ofs = avio_tell(pb) + size;
417 case MKTAG('f', 'm', 't', ' '):
418 /* only parse the first 'fmt ' tag found */
419 if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, st)) < 0) {
422 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
426 case MKTAG('X', 'M', 'A', '2'):
427 /* only parse the first 'XMA2' tag found */
428 if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, st)) < 0) {
431 av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
435 case MKTAG('d', 'a', 't', 'a'):
436 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) && !got_fmt && !got_xma2) {
437 av_log(s, AV_LOG_ERROR,
438 "found no 'fmt ' tag before the 'data' tag\n");
439 return AVERROR_INVALIDDATA;
443 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
444 } else if (size != 0xFFFFFFFF) {
446 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
448 av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
449 "file may be invalid\n");
451 next_tag_ofs = wav->data_end = INT64_MAX;
454 data_ofs = avio_tell(pb);
456 /* don't look for footer metadata if we can't seek or if we don't
457 * know where the data tag ends
459 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!(rf64 && !bw64) && !size))
462 case MKTAG('f', 'a', 'c', 't'):
464 sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
466 case MKTAG('b', 'e', 'x', 't'):
467 if ((ret = wav_parse_bext_tag(s, size)) < 0)
470 case MKTAG('S','M','V','0'):
472 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
473 return AVERROR_INVALIDDATA;
475 // SMV file, a wav file with video appended.
476 if (size != MKTAG('0','2','0','0')) {
477 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
480 av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
481 wav->smv_given_first = 0;
482 vst = avformat_new_stream(s, NULL);
484 return AVERROR(ENOMEM);
488 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
489 vst->codecpar->codec_id = AV_CODEC_ID_SMVJPEG;
490 vst->codecpar->width = avio_rl24(pb);
491 vst->codecpar->height = avio_rl24(pb);
492 if ((ret = ff_alloc_extradata(vst->codecpar, 4)) < 0) {
493 av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
496 size = avio_rl24(pb);
497 wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
499 wav->smv_block_size = avio_rl24(pb);
500 avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
501 vst->duration = avio_rl24(pb);
504 wav->smv_frames_per_jpeg = avio_rl24(pb);
505 if (wav->smv_frames_per_jpeg > 65536) {
506 av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
507 return AVERROR_INVALIDDATA;
509 AV_WL32(vst->codecpar->extradata, wav->smv_frames_per_jpeg);
511 case MKTAG('L', 'I', 'S', 'T'):
512 case MKTAG('l', 'i', 's', 't'):
514 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
515 return AVERROR_INVALIDDATA;
517 switch (avio_rl32(pb)) {
518 case MKTAG('I', 'N', 'F', 'O'):
519 ff_read_riff_info(s, size - 4);
521 case MKTAG('a', 'd', 't', 'l'):
522 if (s->nb_chapters > 0) {
523 while (avio_tell(pb) < next_tag_ofs &&
526 unsigned id, sub_size;
528 if (avio_rl32(pb) != MKTAG('l', 'a', 'b', 'l'))
531 sub_size = avio_rl32(pb);
535 avio_get_str(pb, sub_size - 4, cue_label, sizeof(cue_label));
536 avio_skip(pb, avio_tell(pb) & 1);
538 for (int i = 0; i < s->nb_chapters; i++) {
539 if (s->chapters[i]->id == id) {
540 av_dict_set(&s->chapters[i]->metadata, "title", cue_label, 0);
549 case MKTAG('I', 'D', '3', ' '):
550 case MKTAG('i', 'd', '3', ' '): {
551 ID3v2ExtraMeta *id3v2_extra_meta;
552 ff_id3v2_read_dict(pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
553 if (id3v2_extra_meta) {
554 ff_id3v2_parse_apic(s, id3v2_extra_meta);
555 ff_id3v2_parse_chapters(s, id3v2_extra_meta);
556 ff_id3v2_parse_priv(s, id3v2_extra_meta);
558 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
561 case MKTAG('c', 'u', 'e', ' '):
562 if (size >= 4 && got_fmt && st->codecpar->sample_rate > 0) {
563 AVRational tb = {1, st->codecpar->sample_rate};
564 unsigned nb_cues = avio_rl32(pb);
566 if (size >= nb_cues * 24LL + 4LL) {
567 for (int i = 0; i < nb_cues; i++) {
568 unsigned offset, id = avio_rl32(pb);
571 return AVERROR_INVALIDDATA;
574 offset = avio_rl32(pb);
576 if (!avpriv_new_chapter(s, id, tb, offset, AV_NOPTS_VALUE, NULL))
577 return AVERROR(ENOMEM);
584 /* seek to next tag unless we know that we'll run into EOF */
585 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
586 wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
592 if (!got_fmt && !got_xma2) {
593 av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
594 return AVERROR_INVALIDDATA;
598 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
599 return AVERROR_INVALIDDATA;
602 avio_seek(pb, data_ofs, SEEK_SET);
604 if (data_size > (INT64_MAX>>3)) {
605 av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
609 if ( st->codecpar->bit_rate > 0 && data_size > 0
610 && st->codecpar->sample_rate > 0
611 && sample_count > 0 && st->codecpar->channels > 1
612 && sample_count % st->codecpar->channels == 0) {
613 if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
614 sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
615 sample_count /= st->codecpar->channels;
618 if ( data_size > 0 && sample_count && st->codecpar->channels
619 && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
620 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
624 /* G.729 hack (for Ticket4577)
625 * FIXME: Come up with cleaner, more general solution */
626 if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
627 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
631 if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
632 if ( st->codecpar->channels
634 && av_get_bits_per_sample(st->codecpar->codec_id)
635 && wav->data_end <= avio_size(pb))
636 sample_count = (data_size << 3)
638 (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
641 st->duration = sample_count;
643 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S32LE &&
644 st->codecpar->block_align == st->codecpar->channels * 4 &&
645 st->codecpar->bits_per_coded_sample == 32 &&
646 st->codecpar->extradata_size == 2 &&
647 AV_RL16(st->codecpar->extradata) == 1) {
648 st->codecpar->codec_id = AV_CODEC_ID_PCM_F16LE;
649 st->codecpar->bits_per_coded_sample = 16;
650 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE &&
651 st->codecpar->block_align == st->codecpar->channels * 4 &&
652 st->codecpar->bits_per_coded_sample == 24) {
653 st->codecpar->codec_id = AV_CODEC_ID_PCM_F24LE;
654 } else if (st->codecpar->codec_id == AV_CODEC_ID_XMA1 ||
655 st->codecpar->codec_id == AV_CODEC_ID_XMA2) {
656 st->codecpar->block_align = 2048;
657 } else if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_MS && st->codecpar->channels > 2 &&
658 st->codecpar->block_align < INT_MAX / st->codecpar->channels) {
659 st->codecpar->block_align *= st->codecpar->channels;
662 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
663 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
671 * Find chunk with w64 GUID by skipping over other chunks.
672 * @return the size of the found chunk
674 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
679 while (!avio_feof(pb)) {
680 avio_read(pb, guid, 16);
681 size = avio_rl64(pb);
682 if (size <= 24 || size > INT64_MAX - 8)
683 return AVERROR_INVALIDDATA;
684 if (!memcmp(guid, guid1, 16))
686 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
691 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
695 WAVDemuxContext *wav = s->priv_data;
696 AVStream *st = s->streams[0];
698 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
699 return ff_spdif_read_packet(s, pkt);
701 if (wav->smv_data_ofs > 0) {
702 int64_t audio_dts, video_dts;
703 AVStream *vst = wav->vst;
705 audio_dts = (int32_t)st->cur_dts;
706 video_dts = (int32_t)vst->cur_dts;
708 if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
709 /*We always return a video frame first to get the pixel format first*/
710 wav->smv_last_stream = wav->smv_given_first ?
711 av_compare_ts(video_dts, vst->time_base,
712 audio_dts, st->time_base) > 0 : 0;
713 wav->smv_given_first = 1;
715 wav->smv_last_stream = !wav->smv_last_stream;
716 wav->smv_last_stream |= wav->audio_eof;
717 wav->smv_last_stream &= !wav->smv_eof;
718 if (wav->smv_last_stream) {
719 uint64_t old_pos = avio_tell(s->pb);
720 uint64_t new_pos = wav->smv_data_ofs +
721 wav->smv_block * wav->smv_block_size;
722 if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
726 size = avio_rl24(s->pb);
727 ret = av_get_packet(s->pb, pkt, size);
731 pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg;
732 pkt->duration = wav->smv_frames_per_jpeg;
735 pkt->stream_index = vst->index;
737 avio_seek(s->pb, old_pos, SEEK_SET);
738 if (ret == AVERROR_EOF) {
746 left = wav->data_end - avio_tell(s->pb);
747 if (wav->ignore_length)
750 if (CONFIG_W64_DEMUXER && wav->w64)
751 left = find_guid(s->pb, ff_w64_guid_data) - 24;
753 left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
756 if (wav->smv_data_ofs > 0 && !wav->smv_eof)
760 wav->data_end = avio_tell(s->pb) + left;
763 size = wav->max_size;
764 if (st->codecpar->block_align > 1) {
765 if (size < st->codecpar->block_align)
766 size = st->codecpar->block_align;
767 size = (size / st->codecpar->block_align) * st->codecpar->block_align;
769 size = FFMIN(size, left);
770 ret = av_get_packet(s->pb, pkt, size);
773 pkt->stream_index = 0;
778 static int wav_read_seek(AVFormatContext *s,
779 int stream_index, int64_t timestamp, int flags)
781 WAVDemuxContext *wav = s->priv_data;
782 AVStream *ast = s->streams[0], *vst = wav->vst;
786 if (stream_index != 0 && (!vst || stream_index != vst->index))
787 return AVERROR(EINVAL);
788 if (wav->smv_data_ofs > 0) {
789 int64_t smv_timestamp = timestamp;
790 if (stream_index == 0)
791 smv_timestamp = av_rescale_q(timestamp, ast->time_base, vst->time_base);
793 timestamp = av_rescale_q(smv_timestamp, vst->time_base, ast->time_base);
794 if (wav->smv_frames_per_jpeg > 0) {
795 wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
799 switch (ast->codecpar->codec_id) {
800 case AV_CODEC_ID_MP2:
801 case AV_CODEC_ID_MP3:
802 case AV_CODEC_ID_AC3:
803 case AV_CODEC_ID_DTS:
804 case AV_CODEC_ID_XMA2:
805 /* use generic seeking with dynamically generated indexes */
810 return ff_pcm_read_seek(s, 0, timestamp, flags);
813 static const AVClass wav_demuxer_class = {
814 .class_name = "WAV demuxer",
815 .item_name = av_default_item_name,
816 .option = demux_options,
817 .version = LIBAVUTIL_VERSION_INT,
819 const AVInputFormat ff_wav_demuxer = {
821 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
822 .priv_data_size = sizeof(WAVDemuxContext),
823 .read_probe = wav_probe,
824 .read_header = wav_read_header,
825 .read_packet = wav_read_packet,
826 .read_seek = wav_read_seek,
827 .flags = AVFMT_GENERIC_INDEX,
828 .codec_tag = ff_wav_codec_tags_list,
829 .priv_class = &wav_demuxer_class,
831 #endif /* CONFIG_WAV_DEMUXER */
833 #if CONFIG_W64_DEMUXER
834 static int w64_probe(const AVProbeData *p)
836 if (p->buf_size <= 40)
838 if (!memcmp(p->buf, ff_w64_guid_riff, 16) &&
839 !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
840 return AVPROBE_SCORE_MAX;
845 static int w64_read_header(AVFormatContext *s)
847 int64_t size, data_ofs = 0;
848 AVIOContext *pb = s->pb;
849 WAVDemuxContext *wav = s->priv_data;
854 avio_read(pb, guid, 16);
855 if (memcmp(guid, ff_w64_guid_riff, 16))
856 return AVERROR_INVALIDDATA;
858 /* riff + wave + fmt + sizes */
859 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
860 return AVERROR_INVALIDDATA;
862 avio_read(pb, guid, 16);
863 if (memcmp(guid, ff_w64_guid_wave, 16)) {
864 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
865 return AVERROR_INVALIDDATA;
870 st = avformat_new_stream(s, NULL);
872 return AVERROR(ENOMEM);
874 while (!avio_feof(pb)) {
875 if (avio_read(pb, guid, 16) != 16)
877 size = avio_rl64(pb);
878 if (size <= 24 || INT64_MAX - size < avio_tell(pb))
879 return AVERROR_INVALIDDATA;
881 if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
882 /* subtract chunk header size - normal wav file doesn't count it */
883 ret = ff_get_wav_header(s, pb, st->codecpar, size - 24, 0);
886 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
888 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
889 } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
892 samples = avio_rl64(pb);
894 st->duration = samples;
895 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 32);
896 } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
897 wav->data_end = avio_tell(pb) + size - 24;
899 data_ofs = avio_tell(pb);
900 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
903 avio_skip(pb, size - 24);
904 } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
905 int64_t start, end, cur;
906 uint32_t count, chunk_size, i;
907 int64_t filesize = avio_size(s->pb);
909 start = avio_tell(pb);
910 end = start + FFALIGN(size, INT64_C(8)) - 24;
911 count = avio_rl32(pb);
913 for (i = 0; i < count; i++) {
914 char chunk_key[5], *value;
916 if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
920 avio_read(pb, chunk_key, 4);
921 chunk_size = avio_rl32(pb);
922 if (chunk_size == UINT32_MAX || (filesize >= 0 && chunk_size > filesize))
923 return AVERROR_INVALIDDATA;
925 value = av_malloc(chunk_size + 1);
927 return AVERROR(ENOMEM);
929 ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
934 avio_skip(pb, chunk_size - ret);
936 av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
939 avio_skip(pb, end - avio_tell(pb));
941 av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
942 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
949 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
950 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
952 handle_stream_probing(st);
953 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
955 avio_seek(pb, data_ofs, SEEK_SET);
962 static const AVClass w64_demuxer_class = {
963 .class_name = "W64 demuxer",
964 .item_name = av_default_item_name,
965 .option = &demux_options[W64_DEMUXER_OPTIONS_OFFSET],
966 .version = LIBAVUTIL_VERSION_INT,
969 const AVInputFormat ff_w64_demuxer = {
971 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
972 .priv_data_size = sizeof(WAVDemuxContext),
973 .read_probe = w64_probe,
974 .read_header = w64_read_header,
975 .read_packet = wav_read_packet,
976 .read_seek = wav_read_seek,
977 .flags = AVFMT_GENERIC_INDEX,
978 .codec_tag = ff_wav_codec_tags_list,
979 .priv_class = &w64_demuxer_class,
981 #endif /* CONFIG_W64_DEMUXER */