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soundsystem/snd_wave_source.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Workfile:     $
+// $Date:         $
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef SND_WAVE_SOURCE_H
+#define SND_WAVE_SOURCE_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "soundsystem/snd_audio_source.h"
+#include "sentence.h"
+
+class IterateRIFF;
+
+class CAudioSourceWave : public CAudioSource
+{
+public:
+	CAudioSourceWave( void );
+	~CAudioSourceWave( void );
+
+	void Setup( const char *pFormat, int formatSize, IterateRIFF &walk );
+
+	virtual int				SampleRate( void ) { return m_rate; }
+	inline int				SampleSize( void ) { return m_sampleSize; }
+	virtual float			TrueSampleSize( void );
+
+	void					*GetHeader( void );
+
+	// Legacy
+	virtual	void			ParseChunk( IterateRIFF &walk, int chunkName );
+
+	virtual void			ParseSentence( IterateRIFF &walk );
+	
+	void					ConvertSamples( char *pData, int sampleCount );
+	bool					IsLooped( void ) { return (m_loopStart >= 0) ? true : false; }
+	bool					IsStreaming( void ) { return false; }
+	int						ConvertLoopedPosition( int samplePosition );
+
+	int						SampleCount( void );
+
+	virtual float			GetRunningLength( void )
+							{ 
+								if ( m_rate > 0.0 ) 
+								{
+									return (float)SampleCount() / m_rate;
+								}
+								return 0.0f; }
+		
+	CSentence				*GetSentence( void );
+
+protected:
+	// returns the loop start from a cue chunk
+	int						ParseCueChunk( IterateRIFF &walk );
+	void					Init( const char *pHeaderBuffer, int headerSize );
+
+	int				m_bits;
+	int				m_rate;
+	int				m_channels;
+	int				m_format;
+	int				m_sampleSize;
+	int				m_loopStart;
+	int				m_sampleCount;
+
+private:
+	char			*m_pHeader;
+	CSentence		m_Sentence;
+};
+
+#endif // SND_WAVE_SOURCE_H