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ffmpeg/libavformat/wavdec.c

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/*
* WAV demuxer
* Copyright (c) 2001, 2002 Fabrice Bellard
*
* Sony Wave64 demuxer
* RF64 demuxer
* Copyright (c) 2009 Daniel Verkamp
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "avio.h"
#include "avio_internal.h"
#include "internal.h"
#include "metadata.h"
#include "pcm.h"
#include "riff.h"
typedef struct WAVDemuxContext {
int64_t data_end;
int w64;
} WAVDemuxContext;
#if CONFIG_WAV_DEMUXER
static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
{
*tag = avio_rl32(pb);
return avio_rl32(pb);
}
/* RIFF chunks are always on a even offset. */
static int64_t wav_seek_tag(AVIOContext *s, int64_t offset, int whence)
{
return avio_seek(s, offset + (offset & 1), whence);
}
/* return the size of the found tag */
static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
{
unsigned int tag;
int64_t size;
for (;;) {
if (pb->eof_reached)
return -1;
size = next_tag(pb, &tag);
if (tag == tag1)
break;
wav_seek_tag(pb, size, SEEK_CUR);
}
return size;
}
static int wav_probe(AVProbeData *p)
{
/* check file header */
if (p->buf_size <= 32)
return 0;
if (!memcmp(p->buf + 8, "WAVE", 4)) {
if (!memcmp(p->buf, "RIFF", 4))
/* Since the ACT demuxer has a standard WAV header at the top of
* its own, the returned score is decreased to avoid a probe
* conflict between ACT and WAV. */
return AVPROBE_SCORE_MAX - 1;
else if (!memcmp(p->buf, "RF64", 4) &&
!memcmp(p->buf + 12, "ds64", 4))
return AVPROBE_SCORE_MAX;
}
return 0;
}
static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
{
AVIOContext *pb = s->pb;
int ret;
/* parse fmt header */
*st = avformat_new_stream(s, NULL);
if (!*st)
return AVERROR(ENOMEM);
ret = ff_get_wav_header(pb, (*st)->codec, size);
if (ret < 0)
return ret;
(*st)->need_parsing = AVSTREAM_PARSE_FULL;
avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
return 0;
}
static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
int length)
{
char temp[257];
int ret;
av_assert0(length <= sizeof(temp));
if ((ret = avio_read(s->pb, temp, length)) < 0)
return ret;
temp[length] = 0;
if (strlen(temp))
return av_dict_set(&s->metadata, key, temp, 0);
return 0;
}
static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
{
char temp[131], *coding_history;
int ret, x;
uint64_t time_reference;
int64_t umid_parts[8], umid_mask = 0;
if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
(ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
(ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
(ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
(ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
return ret;
time_reference = avio_rl64(s->pb);
snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
return ret;
/* check if version is >= 1, in which case an UMID may be present */
if (avio_rl16(s->pb) >= 1) {
for (x = 0; x < 8; x++)
umid_mask |= umid_parts[x] = avio_rb64(s->pb);
if (umid_mask) {
/* the string formatting below is per SMPTE 330M-2004 Annex C */
if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
umid_parts[6] == 0 && umid_parts[7] == 0) {
/* basic UMID */
snprintf(temp, sizeof(temp),
"0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
umid_parts[0], umid_parts[1],
umid_parts[2], umid_parts[3]);
} else {
/* extended UMID */
snprintf(temp, sizeof(temp),
"0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
"0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
umid_parts[0], umid_parts[1],
umid_parts[2], umid_parts[3],
umid_parts[4], umid_parts[5],
umid_parts[6], umid_parts[7]);
}
if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
return ret;
}
avio_skip(s->pb, 190);
} else
avio_skip(s->pb, 254);
if (size > 602) {
/* CodingHistory present */
size -= 602;
if (!(coding_history = av_malloc(size + 1)))
return AVERROR(ENOMEM);
if ((ret = avio_read(s->pb, coding_history, size)) < 0)
return ret;
coding_history[size] = 0;
if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
AV_DICT_DONT_STRDUP_VAL)) < 0)
return ret;
}
return 0;
}
static const AVMetadataConv wav_metadata_conv[] = {
{ "description", "comment" },
{ "originator", "encoded_by" },
{ "origination_date", "date" },
{ "origination_time", "creation_time" },
{ 0 },
};
/* wav input */
static int wav_read_header(AVFormatContext *s)
{
int64_t size, av_uninit(data_size);
int64_t sample_count = 0;
int rf64;
uint32_t tag;
AVIOContext *pb = s->pb;
AVStream *st = NULL;
WAVDemuxContext *wav = s->priv_data;
int ret, got_fmt = 0;
int64_t next_tag_ofs, data_ofs = -1;
/* check RIFF header */
tag = avio_rl32(pb);
rf64 = tag == MKTAG('R', 'F', '6', '4');
if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
return AVERROR_INVALIDDATA;
avio_rl32(pb); /* file size */
tag = avio_rl32(pb);
if (tag != MKTAG('W', 'A', 'V', 'E'))
return AVERROR_INVALIDDATA;
if (rf64) {
if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
return AVERROR_INVALIDDATA;
size = avio_rl32(pb);
if (size < 16)
return AVERROR_INVALIDDATA;
avio_rl64(pb); /* RIFF size */
data_size = avio_rl64(pb);
sample_count = avio_rl64(pb);
if (data_size < 0 || sample_count < 0) {
av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
"ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
data_size, sample_count);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
}
for (;;) {
size = next_tag(pb, &tag);
next_tag_ofs = avio_tell(pb) + size;
if (pb->eof_reached)
break;
switch (tag) {
case MKTAG('f', 'm', 't', ' '):
/* only parse the first 'fmt ' tag found */
if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
return ret;
} else if (got_fmt)
av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
got_fmt = 1;
break;
case MKTAG('d', 'a', 't', 'a'):
if (!got_fmt) {
av_log(s, AV_LOG_ERROR,
"found no 'fmt ' tag before the 'data' tag\n");
return AVERROR_INVALIDDATA;
}
if (rf64) {
next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
} else {
data_size = size;
next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
}
data_ofs = avio_tell(pb);
/* don't look for footer metadata if we can't seek or if we don't
* know where the data tag ends
*/
if (!pb->seekable || (!rf64 && !size))
goto break_loop;
break;
case MKTAG('f', 'a', 'c', 't'):
if (!sample_count)
sample_count = avio_rl32(pb);
break;
case MKTAG('b', 'e', 'x', 't'):
if ((ret = wav_parse_bext_tag(s, size)) < 0)
return ret;
break;
case MKTAG('L', 'I', 'S', 'T'):
if (size < 4) {
av_log(s, AV_LOG_ERROR, "too short LIST");
return AVERROR_INVALIDDATA;
}
switch (avio_rl32(pb)) {
case MKTAG('I', 'N', 'F', 'O'):
if ((ret = ff_read_riff_info(s, size - 4)) < 0)
return ret;
}
break;
}
/* seek to next tag unless we know that we'll run into EOF */
if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
wav_seek_tag(pb, next_tag_ofs, SEEK_SET) < 0) {
break;
}
}
break_loop:
if (data_ofs < 0) {
av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
return AVERROR_INVALIDDATA;
}
avio_seek(pb, data_ofs, SEEK_SET);
if (!sample_count && st->codec->channels &&
av_get_bits_per_sample(st->codec->codec_id))
sample_count = (data_size << 3) /
(st->codec->channels *
(uint64_t)av_get_bits_per_sample(st->codec->codec_id));
if (sample_count)
st->duration = sample_count;
ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
return 0;
}
/**
* Find chunk with w64 GUID by skipping over other chunks.
* @return the size of the found chunk
*/
static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
{
uint8_t guid[16];
int64_t size;
while (!pb->eof_reached) {
avio_read(pb, guid, 16);
size = avio_rl64(pb);
if (size <= 24)
return -1;
if (!memcmp(guid, guid1, 16))
return size;
avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
}
return -1;
}
static const uint8_t guid_data[16] = {
'd', 'a', 't', 'a',
0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
};
#define MAX_SIZE 4096
static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size;
int64_t left;
AVStream *st;
WAVDemuxContext *wav = s->priv_data;
st = s->streams[0];
left = wav->data_end - avio_tell(s->pb);
if (left <= 0) {
if (CONFIG_W64_DEMUXER && wav->w64)
left = find_guid(s->pb, guid_data) - 24;
else
left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
if (left < 0)
return AVERROR_EOF;
wav->data_end = avio_tell(s->pb) + left;
}
size = MAX_SIZE;
if (st->codec->block_align > 1) {
if (size < st->codec->block_align)
size = st->codec->block_align;
size = (size / st->codec->block_align) * st->codec->block_align;
}
size = FFMIN(size, left);
ret = av_get_packet(s->pb, pkt, size);
if (ret < 0)
return ret;
pkt->stream_index = 0;
return ret;
}
static int wav_read_seek(AVFormatContext *s,
int stream_index, int64_t timestamp, int flags)
{
AVStream *st;
st = s->streams[0];
switch (st->codec->codec_id) {
case AV_CODEC_ID_MP2:
case AV_CODEC_ID_MP3:
case AV_CODEC_ID_AC3:
case AV_CODEC_ID_DTS:
/* use generic seeking with dynamically generated indexes */
return -1;
default:
break;
}
return ff_pcm_read_seek(s, stream_index, timestamp, flags);
}
AVInputFormat ff_wav_demuxer = {
.name = "wav",
.long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
.priv_data_size = sizeof(WAVDemuxContext),
.read_probe = wav_probe,
.read_header = wav_read_header,
.read_packet = wav_read_packet,
.read_seek = wav_read_seek,
.flags = AVFMT_GENERIC_INDEX,
.codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
};
#endif /* CONFIG_WAV_DEMUXER */
#if CONFIG_W64_DEMUXER
static const uint8_t guid_riff[16] = {
'r', 'i', 'f', 'f',
0x2E, 0x91, 0xCF, 0x11,0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00
};
static const uint8_t guid_wave[16] = {
'w', 'a', 'v', 'e',
0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
};
static const uint8_t guid_fmt[16] = {
'f', 'm', 't', ' ',
0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
};
static int w64_probe(AVProbeData *p)
{
if (p->buf_size <= 40)
return 0;
if (!memcmp(p->buf, guid_riff, 16) &&
!memcmp(p->buf + 24, guid_wave, 16))
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int w64_read_header(AVFormatContext *s)
{
int64_t size;
AVIOContext *pb = s->pb;
WAVDemuxContext *wav = s->priv_data;
AVStream *st;
uint8_t guid[16];
int ret;
avio_read(pb, guid, 16);
if (memcmp(guid, guid_riff, 16))
return AVERROR_INVALIDDATA;
/* riff + wave + fmt + sizes */
if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
return AVERROR_INVALIDDATA;
avio_read(pb, guid, 16);
if (memcmp(guid, guid_wave, 16)) {
av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
return AVERROR_INVALIDDATA;
}
size = find_guid(pb, guid_fmt);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
return AVERROR_INVALIDDATA;
}
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
/* subtract chunk header size - normal wav file doesn't count it */
ret = ff_get_wav_header(pb, st->codec, size - 24);
if (ret < 0)
return ret;
avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
st->need_parsing = AVSTREAM_PARSE_FULL;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
size = find_guid(pb, guid_data);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find data guid\n");
return AVERROR_INVALIDDATA;
}
wav->data_end = avio_tell(pb) + size - 24;
wav->w64 = 1;
return 0;
}
AVInputFormat ff_w64_demuxer = {
.name = "w64",
.long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
.priv_data_size = sizeof(WAVDemuxContext),
.read_probe = w64_probe,
.read_header = w64_read_header,
.read_packet = wav_read_packet,
.read_seek = wav_read_seek,
.flags = AVFMT_GENERIC_INDEX,
.codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
};
#endif /* CONFIG_W64_DEMUXER */
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