// AudioSampleManager.cpp: implementation of the AudioSampleManager class.
//
//////////////////////////////////////////////////////////////////////

#include "AudioSampleManager.h"
#include "AudioSample.h"

#ifndef WIN32
#include "linTypes.h"
#endif

using namespace std;

AudioSampleManager * AudioSampleManager::instance = NULL;

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

AudioSampleManager *
AudioSampleManager::GetInstance()
{
	if (!instance)
	{
		instance = new AudioSampleManager();
	}
	return instance;
}
AudioSampleManager::AudioSampleManager()
{
#ifdef WIN32
	InitializeCriticalSection(&audioSamplesMutex);
#endif
}

AudioSampleManager::~AudioSampleManager()
{
	EnterCriticalSection(&audioSamplesMutex);
	while (audioSamples.size() > 0)
	{
		AudioSample *audioSample = audioSamples.front();
		audioSamples.pop_front();
		delete audioSample;
	}
	LeaveCriticalSection(&audioSamplesMutex);
	DeleteCriticalSection(&audioSamplesMutex);
	delete instance;
}

int
AudioSampleManager::GetAudioSample(AudioSample **ppAudioSample)
{
	EnterCriticalSection(&audioSamplesMutex);
	if (audioSamples.size() > 0)
	{
		*ppAudioSample = audioSamples.front();
		audioSamples.pop_front();
		LeaveCriticalSection(&audioSamplesMutex);
	}
	else
	{
		LeaveCriticalSection(&audioSamplesMutex);
		*ppAudioSample = new AudioSample(this);
	}
	(*ppAudioSample)->refCount = 1;
	(*ppAudioSample)->SetDataSize(0);
	(*ppAudioSample)->SetSilenceDuration(0);
	return 0;
}

int
AudioSampleManager::AudioSampleReleased(AudioSample *audioSample)
{
	audioSample->refCount = 0;
	EnterCriticalSection(&audioSamplesMutex);
	audioSamples.push_back(audioSample);
	LeaveCriticalSection(&audioSamplesMutex);
	return 0;
}