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This commit is contained in:
Glenn Maynard
2006-12-08 03:59:54 +00:00
parent bb898c2a5f
commit a86fd32253
1 changed files with 17 additions and 16 deletions
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stepmania/src/RageSoundMixBuffer.cpp
+17 -16
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@@ -53,58 +53,59 @@ void RageSoundMixBuffer::Extend( unsigned iSamples )
}
}
void RageSoundMixBuffer::write( const int16_t *buf, unsigned size )
void RageSoundMixBuffer::write( const int16_t *pBuf, unsigned iSize )
{
Extend( size );
Extend( iSize );
/* Scale volume and add. */
int32_t *pBuf = m_pMixbuf+m_iOffset;
int32_t *pDestBuf = m_pMixbuf+m_iOffset;
#ifdef USE_VEC
if( g_bVector )
{
Vector::FastSoundWrite( pBuf, buf, size, m_iVolumeFactor );
Vector::FastSoundWrite( pDestBuf, pBuf, iSize, m_iVolumeFactor );
return;
}
#endif
for( unsigned pos = 0; pos < size; ++pos )
for( unsigned pos = 0; pos < iSize; ++pos )
{
*pBuf += buf[pos] * m_iVolumeFactor; ++pBuf;
*pDestBuf += pBuf[pos] * m_iVolumeFactor;
++pDestBuf;
}
}
void RageSoundMixBuffer::read( int16_t *buf )
void RageSoundMixBuffer::read( int16_t *pBuf )
{
#ifdef USE_VEC
if( g_bVector )
{
Vector::FastSoundRead( buf, m_pMixbuf, m_iBufUsed );
Vector::FastSoundRead( pBuf, m_pMixbuf, m_iBufUsed );
m_iBufUsed = 0;
return;
}
#endif
for( unsigned pos = 0; pos < m_iBufUsed; ++pos )
for( unsigned iPos = 0; iPos < m_iBufUsed; ++iPos )
{
int32_t out = (m_pMixbuf[pos]) / 256;
buf[pos] = (int16_t) clamp( out, -32768, 32767 );
int32_t iOut = (m_pMixbuf[iPos]) / 256;
pBuf[iPos] = (int16_t) clamp( iOut, -32768, 32767 );
}
m_iBufUsed = 0;
}
void RageSoundMixBuffer::read( float *buf )
void RageSoundMixBuffer::read( float *pBuf )
{
#ifdef USE_VEC
if( g_bVector )
{
Vector::FastSoundRead( buf, m_pMixbuf, m_iBufUsed );
Vector::FastSoundRead( pBuf, m_pMixbuf, m_iBufUsed );
m_iBufUsed = 0;
return;
}
#endif
const int Minimum = -32768 * 256;
const int Maximum = 32767 * 256;
const int iMinimum = -32768 * 256;
const int iMaximum = 32767 * 256;
for( unsigned pos = 0; pos < m_iBufUsed; ++pos )
buf[pos] = SCALE( (float)m_pMixbuf[pos], Minimum, Maximum, -1.0f, 1.0f );
pBuf[pos] = SCALE( (float)m_pMixbuf[pos], iMinimum, iMaximum, -1.0f, 1.0f );
m_iBufUsed = 0;
}