0,0 → 1,75 |
/* |
* 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, |
}; |