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engine/audio/private/snd_wave_data.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef SND_WAVE_DATA_H
+#define SND_WAVE_DATA_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "snd_audio_source.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: Linear iterator over source data.
+//			Keeps track of position in source, and maintains necessary buffers
+//-----------------------------------------------------------------------------
+abstract_class IWaveData
+{
+public:
+	virtual						~IWaveData( void ) {}
+	virtual CAudioSource		&Source( void ) = 0;
+	virtual int					ReadSourceData( void **pData, int sampleIndex, int sampleCount, char copyBuf[AUDIOSOURCE_COPYBUF_SIZE] ) = 0;
+	virtual bool				IsReadyToMix() = 0;
+};
+
+abstract_class IWaveStreamSource
+{
+public:
+	virtual int		UpdateLoopingSamplePosition( int samplePosition ) = 0;
+	virtual void	UpdateSamples( char *pData, int sampleCount ) = 0;
+	virtual int		GetLoopingInfo( int *pLoopBlock, int *pNumLeadingSamples, int *pNumTrailingSamples ) = 0;
+};
+
+class IFileReadBinary;
+class CSfxTable;
+
+extern IWaveData *CreateWaveDataStream( CAudioSource &source, IWaveStreamSource *pStreamSource, const char *pFileName, int dataStart, int dataSize, CSfxTable *pSfx, int startOffset );
+extern IWaveData *CreateWaveDataMemory( CAudioSource &source );
+
+void PrefetchDataStream( const char *pFileName, int dataOffset, int dataSize );
+
+#endif // SND_WAVE_DATA_H