1 files changed, 101 insertions, 0 deletions
diff --git a/public/soundsystem/snd_audio_source.h b/public/soundsystem/snd_audio_source.h
new file mode 100644
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--- /dev/null
+++ b/public/soundsystem/snd_audio_source.h
@@ -0,0 +1,101 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Workfile:     $
+// $Date:         $
+// $NoKeywords: $
+//===========================================================================//
+
+#ifndef SND_AUDIO_SOURCE_H
+#define SND_AUDIO_SOURCE_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/platform.h"
+
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+//-----------------------------------------------------------------------------
+class CAudioSource;
+class IAudioDevice;
+struct channel_t;
+
+
+//-----------------------------------------------------------------------------
+// Purpose: This is an instance of an audio source.
+//			Mixers are attached to channels and reference an audio source.
+//			Mixers are specific to the sample format and source format.
+//			Mixers are never re-used, so they can track instance data like
+//			sample position, fractional sample, stream cache, faders, etc.
+//-----------------------------------------------------------------------------
+abstract_class CAudioMixer
+{
+public:
+	virtual ~CAudioMixer( void ) {}
+
+	// UNDONE: time compress
+	virtual bool MixDataToDevice( IAudioDevice *pDevice, channel_t *pChannel, int startSample, int sampleCount, int outputRate, bool forward = true ) = 0;
+	virtual void IncrementSamples( channel_t *pChannel, int startSample, int sampleCount,int outputRate, bool forward = true ) = 0;
+	virtual bool SkipSamples( IAudioDevice *pDevice, channel_t *pChannel, int startSample, int sampleCount, int outputRate, bool forward = true ) = 0;
+
+	virtual CAudioSource *GetSource( void ) = 0;
+
+	virtual int GetSamplePosition( void ) = 0;
+	virtual int GetScubPosition( void ) = 0;
+
+	virtual bool SetSamplePosition( int position, bool scrubbing = false ) = 0;
+	virtual void SetLoopPosition( int position ) = 0;
+	virtual int	GetStartPosition( void ) = 0;
+
+	virtual bool	GetActive( void ) = 0;
+	virtual void	SetActive( bool active ) = 0;
+
+	virtual void	SetModelIndex( int index ) = 0;
+	virtual int		GetModelIndex( void ) const = 0;
+
+	virtual void	SetDirection( bool forward ) = 0;
+	virtual bool	GetDirection( void ) const = 0;
+
+	virtual void	SetAutoDelete( bool autodelete ) = 0;
+	virtual bool	GetAutoDelete( void ) const = 0;
+
+	virtual void	SetVolume( float volume ) = 0;
+	virtual channel_t *GetChannel() = 0;
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: A source is an abstraction for a stream, cached file, or procedural
+//			source of audio.
+//-----------------------------------------------------------------------------
+class CSentence;
+
+abstract_class CAudioSource
+{
+public:
+	CAudioSource( void );
+	virtual ~CAudioSource( void );
+
+	// Create an instance (mixer) of this audio source
+	virtual CAudioMixer			*CreateMixer( void ) = 0;
+	virtual int					GetOutputData( void **pData, int samplePosition, int sampleCount, bool forward = true ) = 0;
+	virtual int					SampleRate( void ) = 0;
+	virtual int					SampleSize( void ) = 0;
+	virtual int					SampleCount( void ) = 0;
+	virtual float				TrueSampleSize( void ) = 0;
+	virtual bool				IsLooped( void ) = 0;
+	virtual bool				IsStreaming( void ) = 0;
+	virtual float				GetRunningLength( void ) = 0;
+	virtual int					GetNumChannels() = 0;
+
+	virtual CSentence			*GetSentence( void ) { return NULL; };
+
+};
+
+
+extern CAudioSource *AudioSource_Create( const char *pName );
+
+#endif // SND_AUDIO_SOURCE_H