smsvn -> ssc-hg glue: rearrange directory structure

src/RageSoundMixBuffer.cpp

@@ -0,0 +1,116 @@
+#include "global.h"
+#include "RageSoundMixBuffer.h"
+#include "RageUtil.h"
+
+#if defined(MACOSX)
+#include "archutils/Darwin/VectorHelper.h"
+#ifdef USE_VEC
+static bool g_bVector = Vector::CheckForVector();
+#endif
+#endif
+
+RageSoundMixBuffer::RageSoundMixBuffer()
+{
+	m_iBufSize = m_iBufUsed = 0;
+	m_pMixbuf = NULL;
+	m_iOffset = 0;
+}
+
+RageSoundMixBuffer::~RageSoundMixBuffer()
+{
+	free( m_pMixbuf );
+}
+
+/* write() will start mixing iOffset samples into the buffer.  Be careful; this is
+ * measured in samples, not frames, so if the data is stereo, multiply by two. */
+void RageSoundMixBuffer::SetWriteOffset( int iOffset )
+{
+	m_iOffset = iOffset;
+}
+
+void RageSoundMixBuffer::Extend( unsigned iSamples )
+{
+	const unsigned realsize = iSamples+m_iOffset;
+	if( m_iBufSize < realsize )
+	{
+		m_pMixbuf = (float *) realloc( m_pMixbuf, sizeof(float) * realsize );
+		m_iBufSize = realsize;
+	}
+
+	if( m_iBufUsed < realsize )
+	{
+		memset( m_pMixbuf + m_iBufUsed, 0, (realsize - m_iBufUsed) * sizeof(float) );
+		m_iBufUsed = realsize;
+	}
+}
+
+void RageSoundMixBuffer::write( const float *pBuf, unsigned iSize, int iSourceStride, int iDestStride )
+{
+	if( iSize == 0 )
+		return;
+
+	/* iSize = 3, iDestStride = 2 uses 4 frames.  Don't allocate the stride of the
+	 * last sample. */
+	Extend( iSize * iDestStride - (iDestStride-1) );
+
+	/* Scale volume and add. */
+	float *pDestBuf = m_pMixbuf+m_iOffset;
+
+#ifdef USE_VEC
+	if( g_bVector && iSourceStride == 1 && iDestStride == 1 )
+	{
+		Vector::FastSoundWrite( pDestBuf, pBuf, iSize );
+		return;
+	}
+#endif
+
+	while( iSize )
+	{
+		*pDestBuf += *pBuf;
+		pBuf += iSourceStride;
+		pDestBuf += iDestStride;
+		--iSize;
+	}
+}
+
+void RageSoundMixBuffer::read( int16_t *pBuf )
+{
+	for( unsigned iPos = 0; iPos < m_iBufUsed; ++iPos )
+	{
+		float iOut = m_pMixbuf[iPos];
+		iOut = clamp( iOut, -1.0f, +1.0f );
+		pBuf[iPos] = lrintf(iOut * 32767);
+	}
+	m_iBufUsed = 0;
+}
+
+void RageSoundMixBuffer::read( float *pBuf )
+{
+	memcpy( pBuf, m_pMixbuf, m_iBufUsed*sizeof(float) );
+	m_iBufUsed = 0;
+}
+
+/*
+ * Copyright (c) 2002-2004 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.
+ */