111 lines
2.1 KiB
C++
111 lines
2.1 KiB
C++
#pragma once
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#ifdef AUDIO_OAL
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#include <AL/al.h>
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#define NUM_STREAMBUFFERS 4
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class IDecoder
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{
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public:
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virtual ~IDecoder() { }
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virtual bool IsOpened() = 0;
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virtual uint32 GetSampleSize() = 0;
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virtual uint32 GetSampleCount() = 0;
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virtual uint32 GetSampleRate() = 0;
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virtual uint32 GetChannels() = 0;
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uint32 GetAvgSamplesPerSec()
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{
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return GetChannels() * GetSampleRate();
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}
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uint32 ms2samples(uint32 ms)
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{
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return float(ms) / 1000.0f * float(GetChannels()) * float(GetSampleRate());
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}
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uint32 samples2ms(uint32 sm)
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{
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return float(sm) * 1000.0f / float(GetChannels()) / float(GetSampleRate());
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}
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uint32 GetBufferSamples()
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{
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//return (GetAvgSamplesPerSec() >> 2) - (GetSampleCount() % GetChannels());
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return (GetAvgSamplesPerSec() / 4); // 250ms
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}
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uint32 GetBufferSize()
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{
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return GetBufferSamples() * GetSampleSize();
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}
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virtual void Seek(uint32 milliseconds) = 0;
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virtual uint32 Tell() = 0;
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uint32 GetLength()
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{
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return float(GetSampleCount()) * 1000.0f / float(GetSampleRate());
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}
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virtual uint32 Decode(void *buffer) = 0;
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};
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class CStream
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{
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char m_aFilename[128];
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ALuint &m_alSource;
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ALuint (&m_alBuffers)[NUM_STREAMBUFFERS];
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bool m_bPaused;
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bool m_bActive;
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void *m_pBuffer;
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bool m_bReset;
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uint32 m_nVolume;
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uint8 m_nPan;
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uint32 m_nPosBeforeReset;
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IDecoder *m_pSoundFile;
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bool HasSource();
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void SetPosition(float x, float y, float z);
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void SetPitch(float pitch);
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void SetGain(float gain);
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void Pause();
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void SetPlay(bool state);
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bool FillBuffer(ALuint alBuffer);
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int32 FillBuffers();
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void ClearBuffers();
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public:
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static void Initialise();
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static void Terminate();
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CStream(char *filename, ALuint &source, ALuint (&buffers)[NUM_STREAMBUFFERS]);
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~CStream();
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void Delete();
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bool IsOpened();
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bool IsPlaying();
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void SetPause (bool bPause);
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void SetVolume(uint32 nVol);
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void SetPan (uint8 nPan);
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void SetPosMS (uint32 nPos);
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uint32 GetPosMS();
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uint32 GetLengthMS();
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bool Setup();
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void Start();
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void Stop();
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void Update(void);
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void ProviderInit();
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void ProviderTerm();
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};
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#endif |