111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* ModPlug demuxer
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* @todo ModPlug options (noise reduction, reverb, bass boost, ...)
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* @todo metadata
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*/
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#include <libmodplug/modplug.h>
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#include "avformat.h"
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typedef struct ModPlugContext {
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ModPlugFile *f;
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uint8_t buf[5 * 1<<20]; ///< input file content, 5M max
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} ModPlugContext;
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static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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AVStream *st;
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AVIOContext *pb = s->pb;
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ModPlug_Settings settings;
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ModPlugContext *modplug = s->priv_data;
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int sz = avio_read(pb, modplug->buf, sizeof modplug->buf);
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ModPlug_GetSettings(&settings);
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settings.mChannels = 2;
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settings.mBits = 16;
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settings.mFrequency = 44100;
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settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
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settings.mLoopCount = 0; // prevents looping forever
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ModPlug_SetSettings(&settings);
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modplug->f = ModPlug_Load(modplug->buf, sz);
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if (!modplug->f)
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return AVERROR_INVALIDDATA;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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av_set_pts_info(st, 64, 1, 1000);
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st->duration = ModPlug_GetLength(modplug->f);
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_PCM_S16LE;
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st->codec->channels = settings.mChannels;
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st->codec->sample_rate = settings.mFrequency;
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return 0;
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}
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static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret, n;
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ModPlugContext *modplug = s->priv_data;
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uint8_t buf[512];
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n = ModPlug_Read(modplug->f, buf, sizeof buf);
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if (n <= 0)
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return AVERROR(EIO);
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ret = av_new_packet(pkt, n);
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if (ret)
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return ret;
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pkt->pts = pkt->dts = AV_NOPTS_VALUE;
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pkt->size = n;
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memcpy(pkt->data, buf, n);
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return 0;
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}
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static int modplug_read_close(AVFormatContext *s)
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{
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ModPlugContext *modplug = s->priv_data;
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ModPlug_Unload(modplug->f);
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return 0;
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}
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static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
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{
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const ModPlugContext *modplug = s->priv_data;
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ModPlug_Seek(modplug->f, (int)ts);
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return 0;
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}
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AVInputFormat ff_libmodplug_demuxer = {
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.name = "libmodplug",
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.long_name = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
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.priv_data_size = sizeof(ModPlugContext),
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.read_header = modplug_read_header,
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.read_packet = modplug_read_packet,
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.read_close = modplug_read_close,
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.read_seek = modplug_read_seek,
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.extensions = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm"
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",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz", // compressed mods
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};
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