mirror of https://git.ffmpeg.org/ffmpeg.git
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
|
|
* ADS/SS2 demuxer
|
|
* Copyright (c) 2015 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 "libavutil/channel_layout.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
static int ads_probe(AVProbeData *p)
|
|
{
|
|
if (memcmp(p->buf, "SShd", 4) ||
|
|
memcmp(p->buf+32, "SSbd", 4))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX / 3 * 2;
|
|
}
|
|
|
|
static int ads_read_header(AVFormatContext *s)
|
|
{
|
|
int align, codec, size;
|
|
AVStream *st;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avio_skip(s->pb, 8);
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
codec = avio_rl32(s->pb);
|
|
st->codec->sample_rate = avio_rl32(s->pb);
|
|
if (st->codec->sample_rate <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codec->channels = avio_rl32(s->pb);
|
|
if (st->codec->channels <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
align = avio_rl32(s->pb);
|
|
if (align <= 0 || align > INT_MAX / st->codec->channels)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (codec == 1)
|
|
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR;
|
|
else
|
|
st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX;
|
|
|
|
st->codec->block_align = st->codec->channels * align;
|
|
avio_skip(s->pb, 12);
|
|
size = avio_rl32(s->pb);
|
|
if (st->codec->codec_id == AV_CODEC_ID_ADPCM_PSX)
|
|
st->duration = (size - 0x40) / 16 / st->codec->channels * 28;
|
|
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ads_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVCodecContext *codec = s->streams[0]->codec;
|
|
int ret;
|
|
|
|
ret = av_get_packet(s->pb, pkt, codec->block_align);
|
|
pkt->stream_index = 0;
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_ads_demuxer = {
|
|
.name = "ads",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sony PS2 ADS"),
|
|
.read_probe = ads_probe,
|
|
.read_header = ads_read_header,
|
|
.read_packet = ads_read_packet,
|
|
.extensions = "ads,ss2",
|
|
};
|