135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
/*
|
|
* SoX native format demuxer
|
|
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu>
|
|
*
|
|
* Based on libSoX sox-fmt.c
|
|
* Copyright (c) 2008 robs@users.sourceforge.net
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* SoX native format demuxer
|
|
* @author Daniel Verkamp
|
|
* @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/intfloat.h"
|
|
#include "libavutil/dict.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "pcm.h"
|
|
#include "sox.h"
|
|
|
|
static int sox_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG)
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static int sox_read_header(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
unsigned header_size, comment_size;
|
|
double sample_rate, sample_rate_frac;
|
|
AVStream *st;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
|
|
if (avio_rl32(pb) == SOX_TAG) {
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
|
|
header_size = avio_rl32(pb);
|
|
avio_skip(pb, 8); /* sample count */
|
|
sample_rate = av_int2double(avio_rl64(pb));
|
|
st->codecpar->channels = avio_rl32(pb);
|
|
comment_size = avio_rl32(pb);
|
|
} else {
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
|
|
header_size = avio_rb32(pb);
|
|
avio_skip(pb, 8); /* sample count */
|
|
sample_rate = av_int2double(avio_rb64(pb));
|
|
st->codecpar->channels = avio_rb32(pb);
|
|
comment_size = avio_rb32(pb);
|
|
}
|
|
|
|
if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) {
|
|
av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (sample_rate <= 0 || sample_rate > INT_MAX) {
|
|
av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
sample_rate_frac = sample_rate - floor(sample_rate);
|
|
if (sample_rate_frac)
|
|
av_log(s, AV_LOG_WARNING,
|
|
"truncating fractional part of sample rate (%f)\n",
|
|
sample_rate_frac);
|
|
|
|
if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
|
|
|| st->codecpar->channels > 65535) /* Reserve top 16 bits */ {
|
|
av_log(s, AV_LOG_ERROR, "invalid header\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (comment_size && comment_size < UINT_MAX) {
|
|
char *comment = av_malloc(comment_size+1);
|
|
if(!comment)
|
|
return AVERROR(ENOMEM);
|
|
if (avio_read(pb, comment, comment_size) != comment_size) {
|
|
av_freep(&comment);
|
|
return AVERROR(EIO);
|
|
}
|
|
comment[comment_size] = 0;
|
|
|
|
av_dict_set(&s->metadata, "comment", comment,
|
|
AV_DICT_DONT_STRDUP_VAL);
|
|
}
|
|
|
|
avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size);
|
|
|
|
st->codecpar->sample_rate = sample_rate;
|
|
st->codecpar->bits_per_coded_sample = 32;
|
|
st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate *
|
|
st->codecpar->bits_per_coded_sample *
|
|
st->codecpar->channels;
|
|
st->codecpar->block_align = st->codecpar->bits_per_coded_sample *
|
|
st->codecpar->channels / 8;
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_sox_demuxer = {
|
|
.name = "sox",
|
|
.long_name = NULL_IF_CONFIG_SMALL("SoX native"),
|
|
.read_probe = sox_probe,
|
|
.read_header = sox_read_header,
|
|
.read_packet = ff_pcm_read_packet,
|
|
.read_seek = ff_pcm_read_seek,
|
|
};
|