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engine/audio/private/snd_wave_mixer_private.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Workfile:     $
+// $Date:         $
+//
+//-----------------------------------------------------------------------------
+// $Log: $
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef SND_WAVE_MIXER_PRIVATE_H
+#define SND_WAVE_MIXER_PRIVATE_H
+#pragma once
+
+#include "snd_audio_source.h"
+#include "snd_wave_mixer.h"
+#include "sound_private.h"
+#include "snd_wave_source.h"
+
+class IWaveData;
+
+abstract_class CAudioMixerWave : public CAudioMixer
+{
+public:
+							CAudioMixerWave( IWaveData *data );
+	virtual					~CAudioMixerWave( void );
+
+	int						MixDataToDevice( IAudioDevice *pDevice, channel_t *pChannel, int sampleCount, int outputRate, int outputOffset );
+	int						SkipSamples( channel_t *pChannel, int sampleCount, int outputRate, int outputOffset );
+	bool					ShouldContinueMixing( void );
+
+	virtual void			Mix( IAudioDevice *pDevice, channel_t *pChannel, void *pData, int outputOffset, int inputOffset, fixedint fracRate, int outCount, int timecompress ) = 0;
+	virtual int				GetOutputData( void **pData, int sampleCount, char copyBuf[AUDIOSOURCE_COPYBUF_SIZE] );
+
+	virtual CAudioSource*	GetSource( void );
+	virtual int				GetSamplePosition( void );
+	virtual float			ModifyPitch( float pitch );
+	virtual float			GetVolumeScale( void );
+	
+	// Move the current position to newPosition
+	virtual void			SetSampleStart( int newPosition );
+	
+	// End playback at newEndPosition
+	virtual void			SetSampleEnd( int newEndPosition );
+
+	virtual void			SetStartupDelaySamples( int delaySamples );
+	
+	// private helper routines
+
+	char *					LoadMixBuffer( channel_t *pChannel, int sample_load_request, int *psamples_loaded, char copyBuf[AUDIOSOURCE_COPYBUF_SIZE] );
+	int						MixDataToDevice_( IAudioDevice *pDevice, channel_t *pChannel, int sampleCount, int outputRate, int outputOffset, bool bSkipAllSamples );
+	int						GetSampleLoadRequest( double rate, int sampleCount, bool bInterpolated_pitch );
+
+	virtual bool			IsReadyToMix();
+	virtual int				GetPositionForSave() { return GetSamplePosition(); }
+	virtual void			SetPositionFromSaved( int savedPosition ) { SetSampleStart(savedPosition); }
+
+protected:
+	double				m_fsample_index;			// index of next sample to output
+	int					m_sample_max_loaded;		// count of total samples loaded - ie: the index of 
+													// the next sample to be loaded.
+	int					m_sample_loaded_index;		// index of last sample loaded
+
+	IWaveData			*m_pData;
+	double 				m_forcedEndSample;
+	bool				m_finished;
+	int					m_delaySamples;
+};
+
+
+#endif // SND_WAVE_MIXER_PRIVATE_H