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Quake/snd_modplug.c

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+/*
+ * tracker music (module file) decoding support using libmodplug
+ *
+ * Copyright (C) 2013 O.Sezer <sezero@users.sourceforge.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "quakedef.h"
+
+#if defined(USE_CODEC_MODPLUG)
+#include "snd_codec.h"
+#include "snd_codeci.h"
+#include "snd_modplug.h"
+#include <libmodplug/modplug.h>
+
+static void S_MODPLUG_SetSettings (snd_stream_t *stream)
+{
+	ModPlug_Settings settings;
+
+	ModPlug_GetSettings(&settings);
+	settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;
+	settings.mChannels = shm->channels;
+	settings.mBits = shm->samplebits;
+	settings.mFrequency = shm->speed;
+	settings.mResamplingMode = MODPLUG_RESAMPLE_SPLINE;/*MODPLUG_RESAMPLE_FIR*/
+	settings.mLoopCount = -1;		/* to enable module internal loops */
+	ModPlug_SetSettings(&settings);
+
+	if (stream) {
+		stream->info.rate = shm->speed;
+		stream->info.bits = shm->samplebits;
+		stream->info.width = stream->info.bits / 8;
+		stream->info.channels = shm->channels;
+	}
+}
+
+static qboolean S_MODPLUG_CodecInitialize (void)
+{
+	return true;
+}
+
+static void S_MODPLUG_CodecShutdown (void)
+{
+}
+
+static qboolean S_MODPLUG_CodecOpenStream (snd_stream_t *stream)
+{
+/* need to load the whole file into memory and pass it to libmodplug */
+	byte *moddata;
+	long len;
+	int mark;
+
+	len = FS_filelength (&stream->fh);
+	mark = Hunk_LowMark();
+	moddata = (byte *) Hunk_Alloc(len);
+	FS_fread(moddata, 1, len, &stream->fh);
+
+	S_MODPLUG_SetSettings(stream);
+	stream->priv = ModPlug_Load(moddata, len);
+	Hunk_FreeToLowMark(mark); /* free original file data */
+	if (!stream->priv)
+	{
+		Con_DPrintf("Could not load module %s\n", stream->name);
+		return false;
+	}
+
+	ModPlug_Seek((ModPlugFile*)stream->priv, 0);
+	/* default volume (128) sounds rather low? */
+	ModPlug_SetMasterVolume((ModPlugFile*)stream->priv, 384);	/* 0-512 */
+	return true;
+}
+
+static int S_MODPLUG_CodecReadStream (snd_stream_t *stream, int bytes, void *buffer)
+{
+	return ModPlug_Read((ModPlugFile*)stream->priv, buffer, bytes);
+}
+
+static void S_MODPLUG_CodecCloseStream (snd_stream_t *stream)
+{
+	ModPlug_Unload((ModPlugFile*)stream->priv);
+	S_CodecUtilClose(&stream);
+}
+
+static int S_MODPLUG_CodecJumpToOrder (snd_stream_t *stream, int to)
+{
+	ModPlug_SeekOrder((ModPlugFile*)stream->priv, to);
+	return 0;
+}
+
+static int S_MODPLUG_CodecRewindStream (snd_stream_t *stream)
+{
+	ModPlug_Seek((ModPlugFile*)stream->priv, 0);
+	return 0;
+}
+
+snd_codec_t modplug_codec =
+{
+	CODECTYPE_MOD,
+	true,	/* always available. */
+	"s3m",
+	S_MODPLUG_CodecInitialize,
+	S_MODPLUG_CodecShutdown,
+	S_MODPLUG_CodecOpenStream,
+	S_MODPLUG_CodecReadStream,
+	S_MODPLUG_CodecRewindStream,
+	S_MODPLUG_CodecJumpToOrder,
+	S_MODPLUG_CodecCloseStream,
+	NULL
+};
+
+#endif	/* USE_CODEC_MODPLUG */