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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
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 3 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, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
// //
// plSoundDeswizzler - Quick helper class to extract a single channel of //
// data from stereo (or more)-channel data. //
// //
//////////////////////////////////////////////////////////////////////////////
#include "hsTypes.h"
#include "plSoundDeswizzler.h"
#include <string.h>
plSoundDeswizzler::plSoundDeswizzler( void *srcPtr, UInt32 srcLength, UInt8 numChannels, UInt32 sampleSize )
{
fNumSamples = srcLength / sampleSize;
fSampleSize = sampleSize;
fStride = fSampleSize * numChannels;
fData = (UInt8 *)srcPtr;
fOwnsData = false;
}
plSoundDeswizzler::plSoundDeswizzler( UInt32 srcLength, UInt8 numChannels, UInt32 sampleSize )
{
fNumSamples = srcLength / sampleSize;
fSampleSize = sampleSize;
fStride = fSampleSize * numChannels;
fData = TRACKED_NEW UInt8[ srcLength ];
fOwnsData = true;
}
plSoundDeswizzler::~plSoundDeswizzler()
{
if( fOwnsData )
delete [] fData;
}
void plSoundDeswizzler::Extract( UInt8 channelSelect, void *dest, UInt32 numBytesToProcess )
{
UInt8 *srcPtr = fData + channelSelect * fSampleSize;
UInt8 *destPtr = (UInt8 *)dest;
UInt32 i;
if( numBytesToProcess == 0 )
numBytesToProcess = fNumSamples;
else
numBytesToProcess /= fStride;
// Extract!
for( i = 0; i < numBytesToProcess; i++ )
{
memcpy( destPtr, srcPtr, fSampleSize );
destPtr += fSampleSize;
srcPtr += fStride;
}
}