mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
|
|
* PVF demuxer
|
|
* Copyright (c) 2012 Paul B Mahol
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "pcm.h"
|
|
|
|
static int pvf_probe(AVProbeData *p)
|
|
{
|
|
if (!memcmp(p->buf, "PVF1\n", 5))
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static int pvf_read_header(AVFormatContext *s)
|
|
{
|
|
char buffer[32];
|
|
AVStream *st;
|
|
int bps, channels, sample_rate;
|
|
|
|
avio_skip(s->pb, 5);
|
|
ff_get_line(s->pb, buffer, sizeof(buffer));
|
|
if (sscanf(buffer, "%d %d %d",
|
|
&channels,
|
|
&sample_rate,
|
|
&bps) != 3)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (channels <= 0 || bps <= 0 || sample_rate <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->channels = channels;
|
|
st->codec->sample_rate = sample_rate;
|
|
st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF);
|
|
st->codec->bits_per_coded_sample = bps;
|
|
st->codec->block_align = bps * st->codec->channels / 8;
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_pvf_demuxer = {
|
|
.name = "pvf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"),
|
|
.read_probe = pvf_probe,
|
|
.read_header = pvf_read_header,
|
|
.read_packet = ff_pcm_read_packet,
|
|
.read_seek = ff_pcm_read_seek,
|
|
.extensions = "pvf",
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|