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/*
* 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
* ModPlug demuxer
* @todo ModPlug options (noise reduction, reverb, bass boost, ...)
* @todo metadata
*/
#include <libmodplug/modplug.h>
#include "avformat.h"
typedef struct ModPlugContext {
ModPlugFile *f;
uint8_t buf[5 * 1<<20]; ///< input file content, 5M max
} ModPlugContext;
static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st;
AVIOContext *pb = s->pb;
ModPlug_Settings settings;
ModPlugContext *modplug = s->priv_data;
int sz = avio_read(pb, modplug->buf, sizeof modplug->buf);
ModPlug_GetSettings(&settings);
settings.mChannels = 2;
settings.mBits = 16;
settings.mFrequency = 44100;
settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
settings.mLoopCount = 0; // prevents looping forever
ModPlug_SetSettings(&settings);
modplug->f = ModPlug_Load(modplug->buf, sz);
if (!modplug->f)
return AVERROR_INVALIDDATA;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
av_set_pts_info(st, 64, 1, 1000);
st->duration = ModPlug_GetLength(modplug->f);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_PCM_S16LE;
st->codec->channels = settings.mChannels;
st->codec->sample_rate = settings.mFrequency;
return 0;
}
static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, n;
ModPlugContext *modplug = s->priv_data;
uint8_t buf[512];
n = ModPlug_Read(modplug->f, buf, sizeof buf);
if (n <= 0)
return AVERROR(EIO);
ret = av_new_packet(pkt, n);
if (ret)
return ret;
pkt->pts = pkt->dts = AV_NOPTS_VALUE;
pkt->size = n;
memcpy(pkt->data, buf, n);
return 0;
}
static int modplug_read_close(AVFormatContext *s)
{
ModPlugContext *modplug = s->priv_data;
ModPlug_Unload(modplug->f);
return 0;
}
static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
{
const ModPlugContext *modplug = s->priv_data;
ModPlug_Seek(modplug->f, (int)ts);
return 0;
}
AVInputFormat ff_libmodplug_demuxer = {
.name = "libmodplug",
.long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
.priv_data_size = sizeof(ModPlugContext),
.read_header = modplug_read_header,
.read_packet = modplug_read_packet,
.read_close = modplug_read_close,
.read_seek = modplug_read_seek,
.extensions = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm"
",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz", // compressed mods
};
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