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79 lines
2.8 KiB
79 lines
2.8 KiB
14 years ago
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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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//////////////////////////////////////////////////////////////////////////////
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// //
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// plWAVClipBuffer - Helper class for writing out WAV data in a buffered //
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// manner, with support for clipping off the specified //
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// amount at the end, but without knowing beforehand //
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// exactly how much data we'll have. //
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// //
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// The algorithm goes something like this: we keep two buffers, both the //
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// size of the amount we want to clip. We then start filling in the first //
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// buffer, overflowing into the second buffer and wrapping back to the //
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// first again in a circular fashion. When we fill up one buffer and are //
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// about to advance to the next, we write that next buffer out. Why? //
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// Because we know that, even if we got no more data in, we have enough //
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// data in the first buffer to clip out the amount we want, so the other //
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// half (which will have older data, being a circular buffer) can be //
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// written out safely. //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#ifndef _plWAVClipBuffer_h
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#define _plWAVClipBuffer_h
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//// Class Definition ////////////////////////////////////////////////////////
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class CWaveFile;
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class plWAVClipBuffer
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{
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public:
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plWAVClipBuffer( UInt32 clipSize, CWaveFile *outFile );
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~plWAVClipBuffer();
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// Inits the buffer. Can re-init if you wish
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void Init( UInt32 clipSize, CWaveFile *outFile );
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// Writes/adds data to the buffer
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hsBool WriteData( UInt32 size, UInt8 *data );
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// Call at the end, flushes the buffer and performs the clipping
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hsBool Flush( void );
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protected:
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UInt8 *fBuffers[ 2 ];
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UInt8 fWhichBuffer; // 0 or 1
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UInt32 fCursor, fBufferSize;
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hsBool fFirstFlip, fFlushCalled;
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CWaveFile *fOutFile;
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void IShutdown( void );
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};
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#endif //_plWAVClipBuffer_h
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