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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==*/
//////////////////////////////////////////////////////////////////////////////
// //
// plWAVClipBuffer - Helper class for writing out WAV data in a buffered //
// manner, with support for clipping off the specified //
// amount at the end, but without knowing beforehand //
// exactly how much data we'll have. //
// //
// The algorithm goes something like this: we keep two buffers, both the //
// size of the amount we want to clip. We then start filling in the first //
// buffer, overflowing into the second buffer and wrapping back to the //
// first again in a circular fashion. When we fill up one buffer and are //
// about to advance to the next, we write that next buffer out. Why? //
// Because we know that, even if we got no more data in, we have enough //
// data in the first buffer to clip out the amount we want, so the other //
// half (which will have older data, being a circular buffer) can be //
// written out safely. //
// //
//////////////////////////////////////////////////////////////////////////////
#ifndef _plWAVClipBuffer_h
#define _plWAVClipBuffer_h
//// Class Definition ////////////////////////////////////////////////////////
class CWaveFile;
class plWAVClipBuffer
{
public:
plWAVClipBuffer( UInt32 clipSize, CWaveFile *outFile );
~plWAVClipBuffer();
// Inits the buffer. Can re-init if you wish
void Init( UInt32 clipSize, CWaveFile *outFile );
// Writes/adds data to the buffer
hsBool WriteData( UInt32 size, UInt8 *data );
// Call at the end, flushes the buffer and performs the clipping
hsBool Flush( void );
protected:
UInt8 *fBuffers[ 2 ];
UInt8 fWhichBuffer; // 0 or 1
UInt32 fCursor, fBufferSize;
hsBool fFirstFlip, fFlushCalled;
CWaveFile *fOutFile;
void IShutdown( void );
};
#endif //_plWAVClipBuffer_h