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 {
54 int smv_frames_per_jpeg;
63 int unaligned; // e.g. if an odd number of bytes ID3 tag was prepended
64 int rifx; // RIFX: integer byte order for parameters is big endian
67 #define OFFSET(x) offsetof(WAVDemuxContext, x)
68 #define DEC AV_OPT_FLAG_DECODING_PARAM
69 static const AVOption demux_options[] = {
70 #define W64_DEMUXER_OPTIONS_OFFSET (1 * CONFIG_WAV_DEMUXER)
71 #if CONFIG_WAV_DEMUXER
72 { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
74 { "max_size", "max size of single packet", OFFSET(max_size), AV_OPT_TYPE_INT, { .i64 = 4096 }, 1024, 1 << 22, DEC },
78 static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
80 if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codecpar->codec_tag == 1) {
83 int ret = ffio_ensure_seekback(s->pb, len);
86 uint8_t *buf = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE);
88 ret = AVERROR(ENOMEM);
90 int64_t pos = avio_tell(s->pb);
91 len = ret = avio_read(s->pb, buf, len);
93 ret = ff_spdif_probe(buf, len, &codec);
94 if (ret > AVPROBE_SCORE_EXTENSION) {
95 s->streams[0]->codecpar->codec_id = codec;
99 avio_seek(s->pb, pos, SEEK_SET);
105 av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
109 #if CONFIG_WAV_DEMUXER
111 static int64_t next_tag(AVIOContext *pb, uint32_t *tag, int big_endian)
113 *tag = avio_rl32(pb);
115 return avio_rl32(pb);
117 return avio_rb32(pb);
121 /* RIFF chunks are always at even offsets relative to where they start. */
122 static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence)
124 offset += offset < INT64_MAX && offset + wav->unaligned & 1;
126 return avio_seek(s, offset, whence);
129 /* return the size of the found tag */
130 static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1)
138 size = next_tag(pb, &tag, wav->rifx);
141 wav_seek_tag(wav, pb, size, SEEK_CUR);
146 static int wav_probe(const AVProbeData *p)
148 /* check file header */
149 if (p->buf_size <= 32)
151 if (!memcmp(p->buf + 8, "WAVE", 4)) {
152 if (!memcmp(p->buf, "RIFF", 4) || !memcmp(p->buf, "RIFX", 4))
153 /* Since the ACT demuxer has a standard WAV header at the top of
154 * its own, the returned score is decreased to avoid a probe
155 * conflict between ACT and WAV. */
156 return AVPROBE_SCORE_MAX - 1;
157 else if ((!memcmp(p->buf, "RF64", 4) ||
158 !memcmp(p->buf, "BW64", 4)) &&
159 !memcmp(p->buf + 12, "ds64", 4))
160 return AVPROBE_SCORE_MAX;
165 static void handle_stream_probing(AVStream *st)
167 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
168 st->internal->request_probe = AVPROBE_SCORE_EXTENSION;
169 st->probe_packets = FFMIN(st->probe_packets, 32);
173 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
175 AVIOContext *pb = s->pb;
176 WAVDemuxContext *wav = s->priv_data;
179 /* parse fmt header */
180 *st = avformat_new_stream(s, NULL);
182 return AVERROR(ENOMEM);
184 ret = ff_get_wav_header(s, pb, (*st)->codecpar, size, wav->rifx);
187 handle_stream_probing(*st);
189 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
191 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
196 static int wav_parse_xma2_tag(AVFormatContext *s, int64_t size, AVStream **st)
198 AVIOContext *pb = s->pb;
199 int version, num_streams, i, channels = 0, ret;
202 return AVERROR_INVALIDDATA;
204 *st = avformat_new_stream(s, NULL);
206 return AVERROR(ENOMEM);
208 (*st)->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
209 (*st)->codecpar->codec_id = AV_CODEC_ID_XMA2;
210 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
212 version = avio_r8(pb);
213 if (version != 3 && version != 4)
214 return AVERROR_INVALIDDATA;
215 num_streams = avio_r8(pb);
216 if (size != (32 + ((version==3)?0:8) + 4*num_streams))
217 return AVERROR_INVALIDDATA;
219 (*st)->codecpar->sample_rate = avio_rb32(pb);
223 (*st)->duration = avio_rb32(pb);
226 for (i = 0; i < num_streams; i++) {
227 channels += avio_r8(pb);
230 (*st)->codecpar->channels = channels;
232 if ((*st)->codecpar->channels <= 0 || (*st)->codecpar->sample_rate <= 0)
233 return AVERROR_INVALIDDATA;
235 avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
237 avio_seek(pb, -size, SEEK_CUR);
238 if ((ret = ff_get_extradata(s, (*st)->codecpar, pb, size)) < 0)
244 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
250 av_assert0(length < sizeof(temp));
251 if ((ret = avio_read(s->pb, temp, length)) != length)
252 return ret < 0 ? ret : AVERROR_INVALIDDATA;
257 return av_dict_set(&s->metadata, key, temp, 0);
262 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
264 char temp[131], *coding_history;
266 uint64_t time_reference;
267 int64_t umid_parts[8], umid_mask = 0;
269 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
270 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
271 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
272 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
273 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
276 time_reference = avio_rl64(s->pb);
277 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
278 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
281 /* check if version is >= 1, in which case an UMID may be present */
282 if (avio_rl16(s->pb) >= 1) {
283 for (x = 0; x < 8; x++)
284 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
287 /* the string formatting below is per SMPTE 330M-2004 Annex C */
288 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
289 umid_parts[6] == 0 && umid_parts[7] == 0) {
291 snprintf(temp, sizeof(temp),
292 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
293 umid_parts[0], umid_parts[1],
294 umid_parts[2], umid_parts[3]);
297 snprintf(temp, sizeof(temp),
298 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
299 "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
300 umid_parts[0], umid_parts[1],
301 umid_parts[2], umid_parts[3],
302 umid_parts[4], umid_parts[5],
303 umid_parts[6], umid_parts[7]);
306 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
310 avio_skip(s->pb, 190);
312 avio_skip(s->pb, 254);
315 /* CodingHistory present */
318 if (!(coding_history = av_malloc(size + 1)))
319 return AVERROR(ENOMEM);
321 if ((ret = avio_read(s->pb, coding_history, size)) != size) {
322 av_free(coding_history);
323 return ret < 0 ? ret : AVERROR_INVALIDDATA;
326 coding_history[size] = 0;
327 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
328 AV_DICT_DONT_STRDUP_VAL)) < 0)
335 static const AVMetadataConv wav_metadata_conv[] = {
336 { "description", "comment" },
337 { "originator", "encoded_by" },
338 { "origination_date", "date" },
339 { "origination_time", "creation_time" },
344 static int wav_read_header(AVFormatContext *s)
346 int64_t size, av_uninit(data_size);
347 int64_t sample_count = 0;
348 int rf64 = 0, bw64 = 0;
350 AVIOContext *pb = s->pb;
352 WAVDemuxContext *wav = s->priv_data;
353 int ret, got_fmt = 0, got_xma2 = 0;
354 int64_t next_tag_ofs, data_ofs = -1;
356 wav->unaligned = avio_tell(s->pb) & 1;
358 wav->smv_data_ofs = -1;
363 case MKTAG('R', 'I', 'F', 'F'):
365 case MKTAG('R', 'I', 'F', 'X'):
368 case MKTAG('R', 'F', '6', '4'):
371 case MKTAG('B', 'W', '6', '4'):
375 av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n",
377 return AVERROR_INVALIDDATA;
380 /* read chunk size */
384 if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
385 av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
386 return AVERROR_INVALIDDATA;
390 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
391 return AVERROR_INVALIDDATA;
392 size = avio_rl32(pb);
394 return AVERROR_INVALIDDATA;
395 avio_rl64(pb); /* RIFF size */
397 data_size = avio_rl64(pb);
398 sample_count = avio_rl64(pb);
400 if (data_size < 0 || sample_count < 0) {
401 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
402 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
403 data_size, sample_count);
404 return AVERROR_INVALIDDATA;
406 avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
412 size = next_tag(pb, &tag, wav->rifx);
413 next_tag_ofs = avio_tell(pb) + size;
419 case MKTAG('f', 'm', 't', ' '):
420 /* only parse the first 'fmt ' tag found */
421 if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
424 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
428 case MKTAG('X', 'M', 'A', '2'):
429 /* only parse the first 'XMA2' tag found */
430 if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, &st)) < 0) {
433 av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
437 case MKTAG('d', 'a', 't', 'a'):
438 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) && !got_fmt && !got_xma2) {
439 av_log(s, AV_LOG_ERROR,
440 "found no 'fmt ' tag before the 'data' tag\n");
441 return AVERROR_INVALIDDATA;
445 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
446 } else if (size != 0xFFFFFFFF) {
448 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
450 av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
451 "file may be invalid\n");
453 next_tag_ofs = wav->data_end = INT64_MAX;
456 data_ofs = avio_tell(pb);
458 /* don't look for footer metadata if we can't seek or if we don't
459 * know where the data tag ends
461 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!(rf64 && !bw64) && !size))
464 case MKTAG('f', 'a', 'c', 't'):
466 sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
468 case MKTAG('b', 'e', 'x', 't'):
469 if ((ret = wav_parse_bext_tag(s, size)) < 0)
472 case MKTAG('S','M','V','0'):
474 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
475 return AVERROR_INVALIDDATA;
477 // SMV file, a wav file with video appended.
478 if (size != MKTAG('0','2','0','0')) {
479 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
482 av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
483 wav->smv_given_first = 0;
484 vst = avformat_new_stream(s, NULL);
486 return AVERROR(ENOMEM);
489 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
490 vst->codecpar->codec_id = AV_CODEC_ID_SMVJPEG;
491 vst->codecpar->width = avio_rl24(pb);
492 vst->codecpar->height = avio_rl24(pb);
493 if ((ret = ff_alloc_extradata(vst->codecpar, 4)) < 0) {
494 av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
497 size = avio_rl24(pb);
498 wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
500 wav->smv_block_size = avio_rl24(pb);
501 avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
502 vst->duration = avio_rl24(pb);
505 wav->smv_frames_per_jpeg = avio_rl24(pb);
506 if (wav->smv_frames_per_jpeg > 65536) {
507 av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
508 return AVERROR_INVALIDDATA;
510 AV_WL32(vst->codecpar->extradata, wav->smv_frames_per_jpeg);
512 case MKTAG('L', 'I', 'S', 'T'):
513 case MKTAG('l', 'i', 's', 't'):
515 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
516 return AVERROR_INVALIDDATA;
518 switch (avio_rl32(pb)) {
519 case MKTAG('I', 'N', 'F', 'O'):
520 ff_read_riff_info(s, size - 4);
522 case MKTAG('a', 'd', 't', 'l'):
523 if (s->nb_chapters > 0) {
524 while (avio_tell(pb) < next_tag_ofs &&
527 unsigned id, sub_size;
529 if (avio_rl32(pb) != MKTAG('l', 'a', 'b', 'l'))
532 sub_size = avio_rl32(pb);
536 avio_get_str(pb, sub_size - 4, cue_label, sizeof(cue_label));
537 avio_skip(pb, avio_tell(pb) & 1);
539 for (int i = 0; i < s->nb_chapters; i++) {
540 if (s->chapters[i]->id == id) {
541 av_dict_set(&s->chapters[i]->metadata, "title", cue_label, 0);
550 case MKTAG('I', 'D', '3', ' '):
551 case MKTAG('i', 'd', '3', ' '): {
552 ID3v2ExtraMeta *id3v2_extra_meta;
553 ff_id3v2_read_dict(pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
554 if (id3v2_extra_meta) {
555 ff_id3v2_parse_apic(s, id3v2_extra_meta);
556 ff_id3v2_parse_chapters(s, id3v2_extra_meta);
557 ff_id3v2_parse_priv(s, id3v2_extra_meta);
559 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
562 case MKTAG('c', 'u', 'e', ' '):
563 if (size >= 4 && got_fmt && st->codecpar->sample_rate > 0) {
564 AVRational tb = {1, st->codecpar->sample_rate};
565 unsigned nb_cues = avio_rl32(pb);
567 if (size >= nb_cues * 24LL + 4LL) {
568 for (int i = 0; i < nb_cues; i++) {
569 unsigned offset, id = avio_rl32(pb);
572 return AVERROR_INVALIDDATA;
575 offset = avio_rl32(pb);
577 if (!avpriv_new_chapter(s, id, tb, offset, AV_NOPTS_VALUE, NULL))
578 return AVERROR(ENOMEM);
585 /* seek to next tag unless we know that we'll run into EOF */
586 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
587 wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
593 if (!got_fmt && !got_xma2) {
594 av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
595 return AVERROR_INVALIDDATA;
599 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
600 return AVERROR_INVALIDDATA;
603 avio_seek(pb, data_ofs, SEEK_SET);
605 if (data_size > (INT64_MAX>>3)) {
606 av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
610 if ( st->codecpar->bit_rate > 0 && data_size > 0
611 && st->codecpar->sample_rate > 0
612 && sample_count > 0 && st->codecpar->channels > 1
613 && sample_count % st->codecpar->channels == 0) {
614 if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
615 sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
616 sample_count /= st->codecpar->channels;
619 if ( data_size > 0 && sample_count && st->codecpar->channels
620 && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
621 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
625 /* G.729 hack (for Ticket4577)
626 * FIXME: Come up with cleaner, more general solution */
627 if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
628 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
632 if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
633 if ( st->codecpar->channels
635 && av_get_bits_per_sample(st->codecpar->codec_id)
636 && wav->data_end <= avio_size(pb))
637 sample_count = (data_size << 3)
639 (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
642 st->duration = sample_count;
644 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S32LE &&
645 st->codecpar->block_align == st->codecpar->channels * 4 &&
646 st->codecpar->bits_per_coded_sample == 32 &&
647 st->codecpar->extradata_size == 2 &&
648 AV_RL16(st->codecpar->extradata) == 1) {
649 st->codecpar->codec_id = AV_CODEC_ID_PCM_F16LE;
650 st->codecpar->bits_per_coded_sample = 16;
651 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE &&
652 st->codecpar->block_align == st->codecpar->channels * 4 &&
653 st->codecpar->bits_per_coded_sample == 24) {
654 st->codecpar->codec_id = AV_CODEC_ID_PCM_F24LE;
655 } else if (st->codecpar->codec_id == AV_CODEC_ID_XMA1 ||
656 st->codecpar->codec_id == AV_CODEC_ID_XMA2) {
657 st->codecpar->block_align = 2048;
658 } else if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_MS && st->codecpar->channels > 2 &&
659 st->codecpar->block_align < INT_MAX / st->codecpar->channels) {
660 st->codecpar->block_align *= st->codecpar->channels;
663 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
664 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
672 * Find chunk with w64 GUID by skipping over other chunks.
673 * @return the size of the found chunk
675 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
680 while (!avio_feof(pb)) {
681 avio_read(pb, guid, 16);
682 size = avio_rl64(pb);
683 if (size <= 24 || size > INT64_MAX - 8)
684 return AVERROR_INVALIDDATA;
685 if (!memcmp(guid, guid1, 16))
687 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
692 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
697 WAVDemuxContext *wav = s->priv_data;
699 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
700 return ff_spdif_read_packet(s, pkt);
702 if (wav->smv_data_ofs > 0) {
703 int64_t audio_dts, video_dts;
705 audio_dts = (int32_t)s->streams[0]->cur_dts;
706 video_dts = (int32_t)s->streams[1]->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, s->streams[1]->time_base,
712 audio_dts, s->streams[0]->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 = 1;
737 avio_seek(s->pb, old_pos, SEEK_SET);
738 if (ret == AVERROR_EOF) {
748 left = wav->data_end - avio_tell(s->pb);
749 if (wav->ignore_length)
752 if (CONFIG_W64_DEMUXER && wav->w64)
753 left = find_guid(s->pb, ff_w64_guid_data) - 24;
755 left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
758 if (wav->smv_data_ofs > 0 && !wav->smv_eof)
762 wav->data_end = avio_tell(s->pb) + left;
765 size = wav->max_size;
766 if (st->codecpar->block_align > 1) {
767 if (size < st->codecpar->block_align)
768 size = st->codecpar->block_align;
769 size = (size / st->codecpar->block_align) * st->codecpar->block_align;
771 size = FFMIN(size, left);
772 ret = av_get_packet(s->pb, pkt, size);
775 pkt->stream_index = 0;
780 static int wav_read_seek(AVFormatContext *s,
781 int stream_index, int64_t timestamp, int flags)
783 WAVDemuxContext *wav = s->priv_data;
787 if (wav->smv_data_ofs > 0) {
788 int64_t smv_timestamp = timestamp;
789 if (stream_index == 0)
790 smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
792 timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
793 if (wav->smv_frames_per_jpeg > 0) {
794 wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
799 switch (st->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, stream_index, 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 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 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 */