1 files changed, 112 insertions, 0 deletions

diff --git a/src/audio/oal/stream.h b/src/audio/oal/stream.h
new file mode 100644
index 00000000..f1e5f458
--- /dev/null
+++ b/src/audio/oal/stream.h
@@ -0,0 +1,112 @@
+#pragma once
+#include "common.h"
+
+#ifdef AUDIO_OAL
+#include <AL/al.h>
+
+#define NUM_STREAMBUFFERS 4
+
+class IDecoder
+{
+public:
+	virtual ~IDecoder() { }
+	
+	virtual bool   IsOpened() = 0;
+	
+	virtual uint32 GetSampleSize() = 0;
+	virtual uint32 GetSampleCount() = 0;
+	virtual uint32 GetSampleRate() = 0;
+	virtual uint32 GetChannels() = 0;
+	
+	uint32 GetAvgSamplesPerSec()
+	{
+		return GetChannels() * GetSampleRate();
+	}
+	
+	uint32 ms2samples(uint32 ms)
+	{
+		return float(ms) / 1000.0f * float(GetChannels()) * float(GetSampleRate());
+	}
+	
+	uint32 samples2ms(uint32 sm)
+	{
+		return float(sm) * 1000.0f / float(GetChannels()) / float(GetSampleRate());
+	}
+	
+	uint32 GetBufferSamples()
+	{
+		//return (GetAvgSamplesPerSec() >> 2) - (GetSampleCount() % GetChannels());
+		return (GetAvgSamplesPerSec() / 4); // 250ms
+	}
+	
+	uint32 GetBufferSize()
+	{
+		return GetBufferSamples() * GetSampleSize();
+	}
+	
+	virtual void   Seek(uint32 milliseconds) = 0;
+	virtual uint32 Tell() = 0;
+	
+	uint32 GetLength()
+	{
+		return float(GetSampleCount()) * 1000.0f / float(GetSampleRate());
+	}
+	
+	virtual uint32 Decode(void *buffer) = 0;
+};
+
+class CStream
+{
+	char     m_aFilename[128];
+	ALuint  &m_alSource;
+	ALuint (&m_alBuffers)[NUM_STREAMBUFFERS];
+	
+	bool     m_bPaused;
+	bool     m_bActive;
+	
+	void    *m_pBuffer;
+	
+	bool     m_bReset;
+	uint32   m_nVolume;
+	uint8    m_nPan;
+	uint32   m_nPosBeforeReset;
+	
+	IDecoder *m_pSoundFile;
+	
+	bool HasSource();
+	void SetPosition(float x, float y, float z);
+	void SetPitch(float pitch);
+	void SetGain(float gain);
+	void   Pause();
+	void   SetPlay(bool state);
+	
+	bool   FillBuffer(ALuint alBuffer);
+	int32  FillBuffers();
+	void   ClearBuffers();
+public:
+	static void Initialise();
+	static void Terminate();
+	
+	CStream(char *filename, ALuint &source, ALuint (&buffers)[NUM_STREAMBUFFERS]);
+	~CStream();
+	void   Delete();
+	
+	bool   IsOpened();
+	bool   IsPlaying();
+	void   SetPause (bool bPause);
+	void   SetVolume(uint32 nVol);
+	void   SetPan   (uint8 nPan);
+	void   SetPosMS (uint32 nPos); 
+	uint32 GetPosMS();
+	uint32 GetLengthMS();
+	
+	bool Setup();
+	void Start();
+	void Stop();
+	void Update(void);
+	
+	void ProviderInit();
+	void ProviderTerm();
+};
+
+#endif
\ No newline at end of file