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1 files changed, 64 insertions, 0 deletions

diff --git a/public/vaudio/ivaudio.h b/public/vaudio/ivaudio.h
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+++ b/public/vaudio/ivaudio.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef IVAUDIO_H
+#define IVAUDIO_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+class IAudioStreamEvent
+{
+public:
+	// called by the stream to request more data
+	// seek the source to position "offset"
+	// -1 indicates previous position
+	// copy the data to pBuffer and return the number of bytes copied
+	// you may return less than bytesRequested if the end of the stream
+	// is encountered.
+	virtual int StreamRequestData( void *pBuffer, int bytesRequested, int offset ) = 0;
+};
+
+
+class IAudioStream
+{
+public:
+	virtual ~IAudioStream() {}
+
+	// Decode another bufferSize output bytes from the stream
+	// returns number of bytes decoded
+	virtual int	Decode( void *pBuffer, unsigned int bufferSize ) = 0;
+
+	// output sampling bits (8/16)
+	virtual int GetOutputBits() = 0;
+	// output sampling rate in Hz
+	virtual int GetOutputRate() = 0;
+	// output channels (1=mono,2=stereo)
+	virtual int GetOutputChannels() = 0;
+
+	// seek
+	virtual unsigned int GetPosition() = 0;
+
+	// NOTE: BUGBUG: Only supports seeking forward currently!
+	virtual void SetPosition( unsigned int position ) = 0;
+
+	// reset?
+};
+
+
+#define VAUDIO_INTERFACE_VERSION		"VAudio002"
+class IVAudio
+{
+public:
+	virtual ~IVAudio() {}
+
+	virtual IAudioStream	*CreateMP3StreamDecoder( IAudioStreamEvent *pEventHandler ) = 0;
+	virtual void			DestroyMP3StreamDecoder( IAudioStream *pDecoder ) = 0;
+};
+
+
+#endif // IVAUDIO_H