RageSoundReader_PostBuffering: general filter for post-buffering

effects too simple to warrant their own filter

stepmania/src/RageSoundReader_PostBuffering.cpp

@@ -0,0 +1,64 @@
+#include "global.h"
+#include "RageSoundReader_PostBuffering.h"
+#include "RageSoundUtil.h"
+
+/*
+ * This filter is normally inserted after extended buffering, implementing
+ * properties that do not seek the sound, allowing these properties to be
+ * changed with low latency.
+ */
+
+RageSoundReader_PostBuffering::RageSoundReader_PostBuffering( RageSoundReader *pSource ):
+	RageSoundReader_Filter( pSource )
+{
+	m_fVolume = 1.0f;
+}
+
+
+int RageSoundReader_PostBuffering::Read( char *pBuf, int iFrames )
+{
+	iFrames = m_pSource->Read( pBuf, iFrames );
+	if( iFrames < 0 )
+		return iFrames;
+
+	if( m_fVolume != 1.0f )
+		RageSoundUtil::Attenuate( (int16_t *) pBuf, iFrames * this->GetNumChannels(), m_fVolume );
+
+	return iFrames;
+}
+
+bool RageSoundReader_PostBuffering::SetProperty( const RString &sProperty, float fValue )
+{
+	if( sProperty == "Volume" )
+	{
+		m_fVolume = fValue;
+		return true;
+	}
+
+	return RageSoundReader_Filter::SetProperty( sProperty, fValue );
+}
+
+/*
+ * Copyright (c) 2007 Glenn Maynard
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, and/or sell copies of the Software, and to permit persons to
+ * whom the Software is furnished to do so, provided that the above
+ * copyright notice(s) and this permission notice appear in all copies of
+ * the Software and that both the above copyright notice(s) and this
+ * permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
+ * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */

stepmania/src/RageSoundReader_PostBuffering.h

@@ -0,0 +1,45 @@
+/* RageSoundReader_PostBuffering - Apply low-latency effects. */
+
+#ifndef RAGE_SOUND_READER_POST_BUFFERING_H
+#define RAGE_SOUND_READER_POST_BUFFERING_H
+
+#include "RageSoundReader_Filter.h"
+
+class RageSoundReader_PostBuffering: public RageSoundReader_Filter
+{
+public:
+	RageSoundReader_PostBuffering( RageSoundReader *pSource );
+	RageSoundReader_PostBuffering *Copy() const { return new RageSoundReader_PostBuffering(*this); }
+	virtual int Read( char *pBuf, int iFrames );
+	virtual bool SetProperty( const RString &sProperty, float fValue );
+
+private:
+	float m_fVolume;
+};
+
+#endif
+
+/*
+ * Copyright (c) 2007 Glenn Maynard
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, and/or sell copies of the Software, and to permit persons to
+ * whom the Software is furnished to do so, provided that the above
+ * copyright notice(s) and this permission notice appear in all copies of
+ * the Software and that both the above copyright notice(s) and this
+ * permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
+ * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */