+/*
+ * 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
+};
projects / ffmpeg / commitdiff