add RageSoundReader_Pan

stepmania/src/RageSoundReader_Pan.cpp

@@ -0,0 +1,78 @@
+#include "global.h"
+#include "RageSoundReader_Pan.h"
+#include "RageSoundUtil.h"
+
+RageSoundReader_Pan::RageSoundReader_Pan( RageSoundReader *pSource ):
+	RageSoundReader_Filter( pSource )
+{
+	m_fPan = 0.0;
+}
+
+
+int RageSoundReader_Pan::Read( char *pBuf, unsigned iLen )
+{
+	/* If the source is mono, it'll be converted to stereo; read half as many frames,
+	 * so we have space. */
+	if( m_pSource->GetNumChannels() == 1 )
+		iLen /= 2;
+
+	int iRet = m_pSource->Read( pBuf, iLen );
+	int iSamples = iRet / sizeof(uint16_t);
+	
+	int16_t *pSampleBuf = (int16_t *) pBuf;
+	if( m_pSource->GetNumChannels() == 1 )
+	{
+		RageSoundUtil::ConvertMonoToStereoInPlace( pSampleBuf, iSamples );
+		iRet *= 2;
+		iSamples *= 2;
+	}
+
+	int iFrames = iSamples / GetNumChannels();
+
+	/* This block goes from iStreamFrame to iStreamFrame+iGotFrames. */
+	if( GetNumChannels() == 2 && m_fPan != 0.0 )
+		RageSoundUtil::Pan( pSampleBuf, iFrames, m_fPan );
+
+	return iRet;
+}
+
+unsigned RageSoundReader_Pan::GetNumChannels() const
+{
+	return max( 2u, RageSoundReader_Filter::GetNumChannels() );
+}
+
+bool RageSoundReader_Pan::SetProperty( const RString &sProperty, float fValue )
+{
+	if( sProperty == "Pan" )
+	{
+		m_fPan = fValue;
+		return true;
+	}
+
+	return RageSoundReader_Filter::SetProperty( sProperty, fValue );
+}
+
+/*
+ * Copyright (c) 2006 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_Pan.h

@@ -0,0 +1,46 @@
+/* RageSoundReader_Pan - Pan a sound left and right. */
+
+#ifndef RAGE_SOUND_READER_PAN_H
+#define RAGE_SOUND_READER_PAN_H
+
+#include "RageSoundReader_Filter.h"
+
+class RageSoundReader_Pan: public RageSoundReader_Filter
+{
+public:
+	RageSoundReader_Pan( RageSoundReader *pSource );
+	RageSoundReader_Pan *Copy() const { return new RageSoundReader_Pan(*this); }
+	virtual unsigned GetNumChannels() const;
+	virtual int Read( char *pBuf, unsigned iLen );
+	virtual bool SetProperty( const RString &sProperty, float fValue );
+
+private:
+	float m_fPan;
+};
+
+#endif
+
+/*
+ * Copyright (c) 2006 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.
+ */