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#pragma once
#ifdef AUDIO_OAL
#include <AL/al.h>
#define NUM_STREAMBUFFERS 8
class IDecoder
{
public:
virtual ~IDecoder() { }
virtual bool IsOpened() = 0;
virtual void FileOpen() = 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(GetSampleRate());
}
uint32 samples2ms(uint32 sm)
{
return float(sm) * 1000.0f / 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()
{
FileOpen(); // abort deferred init, we need length now - game has to cache audio file sizes
return float(GetSampleCount()) * 1000.0f / float(GetSampleRate());
}
virtual uint32 Decode(void *buffer) = 0;
};
#ifdef MULTITHREADED_AUDIO
template <typename T> class tsQueue
{
public:
tsQueue() : count(0) { }
void push(const T &value)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_queue.push(value);
count++;
}
bool peekPop(T *retVal)
{
std::lock_guard<std::mutex> lock(m_mutex);
if (count == 0)
return false;
*retVal = m_queue.front();
m_queue.pop();
count--;
return true;
}
void swapNts(tsQueue<T> &replaceWith)
{
m_queue.swap(replaceWith.m_queue);
replaceWith.count = count;
}
/*
void swapTs(tsQueue<T> &replaceWith)
{
std::lock_guard<std::mutex> lock(m_mutex);
std::lock_guard<std::mutex> lock2(replaceWith.m_mutex);
swapNts(replaceWith);
}
*/
bool emptyNts()
{
return count == 0;
}
/*
bool emptyTs()
{
std::lock_guard<std::mutex> lock(m_mutex);
return emptyNts();
}
*/
std::queue<T> m_queue;
int count;
mutable std::mutex m_mutex;
};
#endif
class CStream
{
char m_aFilename[128];
ALuint *m_pAlSources;
ALuint (&m_alBuffers)[NUM_STREAMBUFFERS];
bool m_bPaused;
bool m_bActive;
public:
#ifdef MULTITHREADED_AUDIO
std::mutex m_mutex;
std::queue<std::pair<ALuint, ALuint>> m_fillBuffers; // left and right buffer
tsQueue<std::pair<ALuint, ALuint>> m_queueBuffers;
std::condition_variable m_closeCv;
bool m_bDoSeek;
uint32 m_SeekPos;
bool m_bIExist;
#endif
void *m_pBuffer;
bool m_bReset;
uint32 m_nVolume;
uint8 m_nPan;
uint32 m_nPosBeforeReset;
int32 m_nLoopCount;
IDecoder *m_pSoundFile;
void BuffersShouldBeFilled(); // all
bool BufferShouldBeFilledAndQueued(std::pair<ALuint, ALuint>*); // two (left-right)
#ifdef MULTITHREADED_AUDIO
void FlagAsToBeProcessed(bool close = false);
bool QueueBuffers();
#endif
bool HasSource();
void SetPosition(int i, 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(ALuint *sources, ALuint (&buffers)[NUM_STREAMBUFFERS]);
~CStream();
void Delete();
bool Open(const char *filename, uint32 overrideSampleRate = 32000);
void Close();
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(bool imSureQueueIsEmpty = false, bool lock = true);
void Start();
void Stop();
void Update(void);
void SetLoopCount(int32);
void ProviderInit();
void ProviderTerm();
};
#endif
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