win/AudioDirectSound.cpp - audio/tedplay - Rivoreo Source Code Repositories

 #include "stdafx.h"
 #include <mmsystem.h>
 #include "AudioDirectSound.h"
 #include "Tedmem.h"

 #define DIVISOR 2

 CRITICAL_SECTION AudioDirectSound::cs;

 void CALLBACK TimerProcess(UINT uTimerID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
 {
 	AudioDirectSound *pDDS = (AudioDirectSound *)dwUser;
 	pDDS->TimerCallback();
 }

 HRESULT WINAPI AudioDirectSound::cb(LPBYTE lpDesBuf, const DWORD dwRequiredSamples, DWORD &dwRetSamples, LPVOID lpData)
 {
 	audioCallback(lpData, lpDesBuf, dwRequiredSamples);
 	dwRetSamples = dwRequiredSamples / 2;
 	return 0;
 }

 AudioDirectSound::AudioDirectSound(void *userData, unsigned int sampleFrq_,
 				   unsigned int bufDurInMsec = 40) : Audio(sampleFrq_)
 {
 	InitializeCriticalSection(&cs);
 	//<DirectSound>
 	ZeroMemory(&m_WFE, sizeof(m_WFE));
 	m_lpDS = NULL;
 	m_lpDSB = NULL;
 	m_pHEvent[0] = CreateEvent(NULL, FALSE, FALSE, _T("Direct_Sound_Buffer_Notify_0"));
 	m_pHEvent[1] = CreateEvent(NULL, FALSE, FALSE, _T("Direct_Sound_Buffer_Notify_1"));
 	//</DirectSound>

 	//<Audio Buffer>
 	m_lpAudioBuf = NULL;
 	m_lpGETAUDIOSAMPLES = NULL;
 	m_lpData = NULL;
 	//</Audio Buffer>

 	//<Playing>
 	m_dwCircles1 = 0;
 	m_dwCircles2 = 0;
 	//</Playing>

 	//
 	unsigned int fragsPerSec = 1000 / bufDurInMsec;
 	unsigned int bufSize1kbChunk = (sampleFrq_ / fragsPerSec / 1024) * 1024;
 	if (!bufSize1kbChunk) bufSize1kbChunk = 512;
 	bufferLength = bufSize1kbChunk;
 	unsigned int bfSize = TED_SOUND_CLOCK / fragsPerSec; //(bufferLength * TED_SOUND_CLOCK + sampleFrq_ / 2) / sampleFrq_;
 	// double length ring buffer, dividable by 8
 	ringBufferSize = (bfSize / 8 + 1) * 16;
 	ringBuffer = new short[ringBufferSize];
 	// trigger initial buffer fill
 	ringBufferIndex = ringBufferSize-1;

 	// Initialize
 	m_WFE.wFormatTag = WAVE_FORMAT_PCM;
 	m_WFE.nChannels = 1;
 	m_WFE.nSamplesPerSec = sampleFrq_;
 	m_WFE.wBitsPerSample = 16;
 	m_WFE.nBlockAlign = m_WFE.nChannels * m_WFE.wBitsPerSample / 8;
 	m_WFE.nAvgBytesPerSec = m_WFE.nSamplesPerSec * m_WFE.nBlockAlign;
 	m_WFE.cbSize = 0;
 	SetFormat(m_WFE);
 	SetCallback( cb, userData);
 }
 //</AudioDirectSound>

 AudioDirectSound::~AudioDirectSound()
 {
 	if (NULL != m_lpAudioBuf) {
 		delete []m_lpAudioBuf;
 		m_lpAudioBuf = NULL;
 	}
 }
 //</~AudioDirectSound>

 void AudioDirectSound::SetFormat(WAVEFORMATEX WFE)
 {
 	m_WFE = WFE;

 	//Create DirectSound
 	if ( FAILED(DirectSoundCreate(NULL, &m_lpDS, NULL)) ) {
 		OutputDebugString(_T("Create DirectSound Failed!"));
 		m_strLastError = _T("MyDirectSound SetFormat Failed!");
 		return;
 	}

 	//Set Cooperative Level
 	HWND hWnd = GetForegroundWindow();
 	if (hWnd == NULL) {
 		hWnd = GetDesktopWindow();
 	}

 	if ( FAILED(m_lpDS->SetCooperativeLevel(hWnd, DSSCL_PRIORITY)) ) {
 		OutputDebugString(_T("SetCooperativeLevel Failed"));
 		m_strLastError = _T("MyDirectSound SetFormat Failed!");
 		return;
 	}

 	//Create Primary Buffer
 	DSBUFFERDESC dsbd;
 	ZeroMemory(&dsbd, sizeof(dsbd));
 	dsbd.dwSize = sizeof(DSBUFFERDESC);
 	dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
 	dsbd.dwBufferBytes = 0;
 	dsbd.lpwfxFormat = NULL;

 	LPDIRECTSOUNDBUFFER lpDSB = NULL;
 	if ( FAILED(m_lpDS->CreateSoundBuffer(&dsbd, &lpDSB, NULL)) ) {
 		OutputDebugString(_T("Create Primary Sound Buffer Failed!"));
 		m_strLastError = _T("MyDirectSound SetFormat Failed!");
 		return;
 	}

 	//Set Primary Buffer Format
 	if ( FAILED(lpDSB->SetFormat(&m_WFE)) ) {
 		OutputDebugString(_T("Set Primary Format Failed!"));
 		m_strLastError = _T("MyDirectSound SetFormat Failed!");
 		return;
 	}

 	//Create Second Sound Buffer
 	dsbd.dwFlags = DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS_GLOBALFOCUS;
 	dsbd.dwBufferBytes = 2 * 2 * bufferLength; //2 bytes per sample twice
 	dsbd.lpwfxFormat = &m_WFE;

 	if ( FAILED(m_lpDS->CreateSoundBuffer(&dsbd, &m_lpDSB, NULL)) ) {
 		OutputDebugString(_T("Create Second Sound Buffer Failed!"));
 		m_strLastError = _T("MyDirectSound SetFormat Failed!");
 		return;
 	}

 	//Query DirectSoundNotify
 	LPDIRECTSOUNDNOTIFY lpDSBNotify;
 	if ( FAILED(m_lpDSB->QueryInterface(IID_IDirectSoundNotify, (LPVOID *)&lpDSBNotify)) ) {
 		OutputDebugString(_T("QueryInterface DirectSoundNotify Failed!"));
 		m_strLastError = _T("QueryInterface IID_IDirectSoundNotify Failed!");
 		return;
 	}

 	//Set Direct Sound Buffer Notify Position
 	DSBPOSITIONNOTIFY pPosNotify[2];
 	pPosNotify[0].dwOffset = bufferLength - 1;
 	pPosNotify[1].dwOffset = 3 * bufferLength - 1;
 	pPosNotify[0].hEventNotify = m_pHEvent[0];
 	pPosNotify[1].hEventNotify = m_pHEvent[1];

 	if ( FAILED(lpDSBNotify->SetNotificationPositions(2, pPosNotify)) ) {
 		OutputDebugString(_T("Set NotificationPosition Failed!"));
 		m_strLastError = _T("SetNotificationPositions Failed!");
 		return;
 	}

 	//New audio buffer
 	if (NULL != m_lpAudioBuf) {
 		delete []m_lpAudioBuf;
 		m_lpAudioBuf = NULL;
 	}
 	m_lpAudioBuf = new unsigned char[bufferLength * 2 * 2];

 	//Init Audio Buffer
 	memset(m_lpAudioBuf, 0, bufferLength * 2 * 2);
 }
 //</SetFormat>

 void AudioDirectSound::play()
 {
 	paused = false;
 	//Check if the DirectSound was created successfully
 	if (NULL == m_lpDS) {
 		m_strLastError = _T("DirectSound was not created!");
 		OutputDebugString(m_strLastError);
 		return;
 	}

 	//Check if the callback function is valid
 	if (NULL == m_lpGETAUDIOSAMPLES) {
 		m_strLastError = _T("Callback Function is NULL!");
 		OutputDebugString(m_strLastError);
 		return;
 	}

 	//Check if SetFormat successfully
 	if ( !m_strLastError.CompareNoCase(_T("MyDirectSound SetFormat Failed!")) ) {
 		OutputDebugString(m_strLastError);
 		return;
 	}

 	//Begin Play
 	m_lpDSB->Play(0, 0, DSBPLAY_LOOPING);
 	m_timerID = timeSetEvent(20, 10, TimerProcess, (DWORD)this, TIME_PERIODIC | TIME_CALLBACK_FUNCTION);
 }
 //</Play>

 void AudioDirectSound::pause()
 {
 	paused = true;
 	if (NULL != m_lpDSB) {
 		m_lpDSB->Stop(); // FIXME clicks... :(
 		timeKillEvent(m_timerID);
 	}
 }
 //</Pause>

 void AudioDirectSound::stop()
 {
 	paused = true;
 	if (NULL != m_lpDSB) {

 		m_lpDSB->Stop();
 		timeKillEvent(m_timerID);

 		//Empty the buffer
 		LPVOID lpvAudio1 = NULL;
 		DWORD dwBytesAudio1 = 0;
 		HRESULT hr = m_lpDSB->Lock(0, 0, &lpvAudio1, &dwBytesAudio1, NULL, NULL, DSBLOCK_ENTIREBUFFER);
 		if ( FAILED(hr) ) {
 			m_strLastError = _T("Lock entirebuffer failed! Stop Failed!");
 			OutputDebugString(m_strLastError);
 			return;
 		}
 		memset(lpvAudio1, 0, dwBytesAudio1);
 		m_lpDSB->Unlock(lpvAudio1, dwBytesAudio1, NULL, NULL);

 		//Move the current play position to begin
 		m_lpDSB->SetCurrentPosition(0);

 		//Reset Event
 		ResetEvent(m_pHEvent[0]);
 		ResetEvent(m_pHEvent[1]);

 		//Set Circles1 and Circles2 0
 		m_dwCircles1 = 0;
 		m_dwCircles2 = 0;
 	}
 }
 //</Stop>

 void AudioDirectSound::lock()
 {
 	//
 }
 void AudioDirectSound::unlock()
 {
 	//
 }

 DWORD AudioDirectSound::GetSamplesPlayed()
 {
 	if (NULL == m_lpDSB) {
 		return 0;
 	}

 	//Get current play position
 	DWORD dwCurPlayPos = 0, dwCurPlaySample = 0;
 	m_lpDSB->GetCurrentPosition(&dwCurPlayPos, NULL);
 	dwCurPlaySample = dwCurPlayPos/m_WFE.nBlockAlign;

 	//Caculate the samples played
 	DWORD dwSamplesPlayed = 0;
 	if (m_dwCircles2 < 1) {
 		return dwCurPlaySample;
 	}

 	dwSamplesPlayed = (m_dwCircles2 - 1) * bufferLength * 2 + 3 * bufferLength / 2;
 	if (dwCurPlaySample > (3 * bufferLength / 2)) {
 		if (m_dwCircles2 < m_dwCircles1) {
 			dwSamplesPlayed = (m_dwCircles1-1) * 2 * bufferLength + 3 * bufferLength / 2;
 		}
 		dwSamplesPlayed += dwCurPlaySample - 3 * bufferLength / 2 + 1;
 	} else {
 		dwSamplesPlayed += dwCurPlaySample + bufferLength / 2;
 	}

 	CString strSamplesPlayed;
 	strSamplesPlayed.Format(_T("Samples Played: %d \n"), dwSamplesPlayed);
 	OutputDebugString(strSamplesPlayed);

 	return dwSamplesPlayed;
 }
 //</GetSamplePlaying>

 void AudioDirectSound::SetCallback(LPGETAUDIOSAMPLES_PROGRESS Function_Callback, LPVOID lpData)
 {
 	m_lpGETAUDIOSAMPLES = Function_Callback;
 	m_lpData = lpData;
 }
 //</SetCallback>

 void AudioDirectSound::TimerCallback()
 {
 	LPVOID lpvAudio1 = NULL, lpvAudio2 = NULL;
 	DWORD dwBytesAudio1 = 0, dwBytesAudio2 = 0;
 	DWORD dwRetSamples = 0, dwRetBytes = 0;

 	HRESULT hr = WaitForMultipleObjects(2, m_pHEvent, FALSE, 0);
 	if(WAIT_OBJECT_0 == hr) {

 		m_dwCircles1++;

 		//Lock DirectSoundBuffer Second Part
 		HRESULT hr = m_lpDSB->Lock(bufferLength * 2, bufferLength * 2,
 			&lpvAudio1, &dwBytesAudio1, &lpvAudio2, &dwBytesAudio2, 0);
 		if ( FAILED(hr) ) {
 			m_strLastError = _T("Lock DirectSoundBuffer Failed!");
 			OutputDebugString(m_strLastError);
 			return;
 		}
 	} else if (WAIT_OBJECT_0 + 1 == hr) {

 		m_dwCircles2++;

 		//Lock DirectSoundBuffer First Part
 		HRESULT hr = m_lpDSB->Lock(0, bufferLength * 2, &lpvAudio1, &dwBytesAudio1,
 			&lpvAudio2, &dwBytesAudio2, 0);
 		if ( FAILED(hr) ) {
 			m_strLastError = _T("Lock DirectSoundBuffer Failed!");
 			OutputDebugString(m_strLastError);
 			return;
 		}
 	} else {
 		return;
 	}

 	// Fill audio buffer via callback function
 	m_lpGETAUDIOSAMPLES(m_lpAudioBuf, bufferLength * 2, dwRetSamples, m_lpData);

 	//Copy AudioBuffer to DirectSoundBuffer
 	if (NULL == lpvAudio2) {
 		memcpy(lpvAudio1, m_lpAudioBuf, dwBytesAudio1);
 	} else {
 		memcpy(lpvAudio1, m_lpAudioBuf, dwBytesAudio1);
 		memcpy(lpvAudio2, m_lpAudioBuf + dwBytesAudio1, dwBytesAudio2);
 	}

 	//Unlock DirectSoundBuffer
 	m_lpDSB->Unlock(lpvAudio1, dwBytesAudio1, lpvAudio2, dwBytesAudio2);
 }
 //</TimerCallback>
	#include "stdafx.h"
	#include <mmsystem.h>
	#include "AudioDirectSound.h"
	#include "Tedmem.h"

	#define DIVISOR 2

	CRITICAL_SECTION AudioDirectSound::cs;

	void CALLBACK TimerProcess(UINT uTimerID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
	{
	AudioDirectSound pDDS = (AudioDirectSound )dwUser;
	pDDS->TimerCallback();
	}

	HRESULT WINAPI AudioDirectSound::cb(LPBYTE lpDesBuf, const DWORD dwRequiredSamples, DWORD &dwRetSamples, LPVOID lpData)
	{
	audioCallback(lpData, lpDesBuf, dwRequiredSamples);
	dwRetSamples = dwRequiredSamples / 2;
	return 0;
	}

	AudioDirectSound::AudioDirectSound(void *userData, unsigned int sampleFrq_,
	unsigned int bufDurInMsec = 40) : Audio(sampleFrq_)
	{
	InitializeCriticalSection(&cs);
	//<DirectSound>
	ZeroMemory(&m_WFE, sizeof(m_WFE));
	m_lpDS = NULL;
	m_lpDSB = NULL;
	m_pHEvent[0] = CreateEvent(NULL, FALSE, FALSE, _T("Direct_Sound_Buffer_Notify_0"));
	m_pHEvent[1] = CreateEvent(NULL, FALSE, FALSE, _T("Direct_Sound_Buffer_Notify_1"));
	//</DirectSound>

	//<Audio Buffer>
	m_lpAudioBuf = NULL;
	m_lpGETAUDIOSAMPLES = NULL;
	m_lpData = NULL;
	//</Audio Buffer>

	//<Playing>
	m_dwCircles1 = 0;
	m_dwCircles2 = 0;
	//</Playing>

	//
	unsigned int fragsPerSec = 1000 / bufDurInMsec;
	unsigned int bufSize1kbChunk = (sampleFrq_ / fragsPerSec / 1024) * 1024;
	if (!bufSize1kbChunk) bufSize1kbChunk = 512;
	bufferLength = bufSize1kbChunk;
	unsigned int bfSize = TED_SOUND_CLOCK / fragsPerSec; //(bufferLength * TED_SOUND_CLOCK + sampleFrq_ / 2) / sampleFrq_;
	// double length ring buffer, dividable by 8
	ringBufferSize = (bfSize / 8 + 1) * 16;
	ringBuffer = new short[ringBufferSize];
	// trigger initial buffer fill
	ringBufferIndex = ringBufferSize-1;

	// Initialize
	m_WFE.wFormatTag = WAVE_FORMAT_PCM;
	m_WFE.nChannels = 1;
	m_WFE.nSamplesPerSec = sampleFrq_;
	m_WFE.wBitsPerSample = 16;
	m_WFE.nBlockAlign = m_WFE.nChannels * m_WFE.wBitsPerSample / 8;
	m_WFE.nAvgBytesPerSec = m_WFE.nSamplesPerSec * m_WFE.nBlockAlign;
	m_WFE.cbSize = 0;
	SetFormat(m_WFE);
	SetCallback( cb, userData);
	}
	//</AudioDirectSound>

	AudioDirectSound::~AudioDirectSound()
	{
	if (NULL != m_lpAudioBuf) {
	delete []m_lpAudioBuf;
	m_lpAudioBuf = NULL;
	}
	}
	//</~AudioDirectSound>

	void AudioDirectSound::SetFormat(WAVEFORMATEX WFE)
	{
	m_WFE = WFE;

	//Create DirectSound
	if ( FAILED(DirectSoundCreate(NULL, &m_lpDS, NULL)) ) {
	OutputDebugString(_T("Create DirectSound Failed!"));
	m_strLastError = _T("MyDirectSound SetFormat Failed!");
	return;
	}

	//Set Cooperative Level
	HWND hWnd = GetForegroundWindow();
	if (hWnd == NULL) {
	hWnd = GetDesktopWindow();
	}

	if ( FAILED(m_lpDS->SetCooperativeLevel(hWnd, DSSCL_PRIORITY)) ) {
	OutputDebugString(_T("SetCooperativeLevel Failed"));
	m_strLastError = _T("MyDirectSound SetFormat Failed!");
	return;
	}

	//Create Primary Buffer
	DSBUFFERDESC dsbd;
	ZeroMemory(&dsbd, sizeof(dsbd));
	dsbd.dwSize = sizeof(DSBUFFERDESC);
	dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
	dsbd.dwBufferBytes = 0;
	dsbd.lpwfxFormat = NULL;

	LPDIRECTSOUNDBUFFER lpDSB = NULL;
	if ( FAILED(m_lpDS->CreateSoundBuffer(&dsbd, &lpDSB, NULL)) ) {
	OutputDebugString(_T("Create Primary Sound Buffer Failed!"));
	m_strLastError = _T("MyDirectSound SetFormat Failed!");
	return;
	}

	//Set Primary Buffer Format
	if ( FAILED(lpDSB->SetFormat(&m_WFE)) ) {
	OutputDebugString(_T("Set Primary Format Failed!"));
	m_strLastError = _T("MyDirectSound SetFormat Failed!");
	return;
	}

	//Create Second Sound Buffer
	dsbd.dwFlags = DSBCAPS_CTRLPOSITIONNOTIFY \| DSBCAPS_GLOBALFOCUS;
	dsbd.dwBufferBytes = 2 * 2 * bufferLength; //2 bytes per sample twice
	dsbd.lpwfxFormat = &m_WFE;

	if ( FAILED(m_lpDS->CreateSoundBuffer(&dsbd, &m_lpDSB, NULL)) ) {
	OutputDebugString(_T("Create Second Sound Buffer Failed!"));
	m_strLastError = _T("MyDirectSound SetFormat Failed!");
	return;
	}

	//Query DirectSoundNotify
	LPDIRECTSOUNDNOTIFY lpDSBNotify;
	if ( FAILED(m_lpDSB->QueryInterface(IID_IDirectSoundNotify, (LPVOID *)&lpDSBNotify)) ) {
	OutputDebugString(_T("QueryInterface DirectSoundNotify Failed!"));
	m_strLastError = _T("QueryInterface IID_IDirectSoundNotify Failed!");
	return;
	}

	//Set Direct Sound Buffer Notify Position
	DSBPOSITIONNOTIFY pPosNotify[2];
	pPosNotify[0].dwOffset = bufferLength - 1;
	pPosNotify[1].dwOffset = 3 * bufferLength - 1;
	pPosNotify[0].hEventNotify = m_pHEvent[0];
	pPosNotify[1].hEventNotify = m_pHEvent[1];

	if ( FAILED(lpDSBNotify->SetNotificationPositions(2, pPosNotify)) ) {
	OutputDebugString(_T("Set NotificationPosition Failed!"));
	m_strLastError = _T("SetNotificationPositions Failed!");
	return;
	}

	//New audio buffer
	if (NULL != m_lpAudioBuf) {
	delete []m_lpAudioBuf;
	m_lpAudioBuf = NULL;
	}
	m_lpAudioBuf = new unsigned char[bufferLength * 2 * 2];

	//Init Audio Buffer
	memset(m_lpAudioBuf, 0, bufferLength * 2 * 2);
	}
	//</SetFormat>

	void AudioDirectSound::play()
	{
	paused = false;
	//Check if the DirectSound was created successfully
	if (NULL == m_lpDS) {
	m_strLastError = _T("DirectSound was not created!");
	OutputDebugString(m_strLastError);
	return;
	}

	//Check if the callback function is valid
	if (NULL == m_lpGETAUDIOSAMPLES) {
	m_strLastError = _T("Callback Function is NULL!");
	OutputDebugString(m_strLastError);
	return;
	}

	//Check if SetFormat successfully
	if ( !m_strLastError.CompareNoCase(_T("MyDirectSound SetFormat Failed!")) ) {
	OutputDebugString(m_strLastError);
	return;
	}

	//Begin Play
	m_lpDSB->Play(0, 0, DSBPLAY_LOOPING);
	m_timerID = timeSetEvent(20, 10, TimerProcess, (DWORD)this, TIME_PERIODIC \| TIME_CALLBACK_FUNCTION);
	}
	//</Play>

	void AudioDirectSound::pause()
	{
	paused = true;
	if (NULL != m_lpDSB) {
	m_lpDSB->Stop(); // FIXME clicks... :(
	timeKillEvent(m_timerID);
	}
	}
	//</Pause>

	void AudioDirectSound::stop()
	{
	paused = true;
	if (NULL != m_lpDSB) {

	m_lpDSB->Stop();
	timeKillEvent(m_timerID);

	//Empty the buffer
	LPVOID lpvAudio1 = NULL;
	DWORD dwBytesAudio1 = 0;
	HRESULT hr = m_lpDSB->Lock(0, 0, &lpvAudio1, &dwBytesAudio1, NULL, NULL, DSBLOCK_ENTIREBUFFER);
	if ( FAILED(hr) ) {
	m_strLastError = _T("Lock entirebuffer failed! Stop Failed!");
	OutputDebugString(m_strLastError);
	return;
	}
	memset(lpvAudio1, 0, dwBytesAudio1);
	m_lpDSB->Unlock(lpvAudio1, dwBytesAudio1, NULL, NULL);

	//Move the current play position to begin
	m_lpDSB->SetCurrentPosition(0);

	//Reset Event
	ResetEvent(m_pHEvent[0]);
	ResetEvent(m_pHEvent[1]);

	//Set Circles1 and Circles2 0
	m_dwCircles1 = 0;
	m_dwCircles2 = 0;
	}
	}
	//</Stop>

	void AudioDirectSound::lock()
	{
	//
	}
	void AudioDirectSound::unlock()
	{
	//
	}

	DWORD AudioDirectSound::GetSamplesPlayed()
	{
	if (NULL == m_lpDSB) {
	return 0;
	}

	//Get current play position
	DWORD dwCurPlayPos = 0, dwCurPlaySample = 0;
	m_lpDSB->GetCurrentPosition(&dwCurPlayPos, NULL);
	dwCurPlaySample = dwCurPlayPos/m_WFE.nBlockAlign;

	//Caculate the samples played
	DWORD dwSamplesPlayed = 0;
	if (m_dwCircles2 < 1) {
	return dwCurPlaySample;
	}

	dwSamplesPlayed = (m_dwCircles2 - 1) * bufferLength * 2 + 3 * bufferLength / 2;
	if (dwCurPlaySample > (3 * bufferLength / 2)) {
	if (m_dwCircles2 < m_dwCircles1) {
	dwSamplesPlayed = (m_dwCircles1-1) * 2 * bufferLength + 3 * bufferLength / 2;
	}
	dwSamplesPlayed += dwCurPlaySample - 3 * bufferLength / 2 + 1;
	} else {
	dwSamplesPlayed += dwCurPlaySample + bufferLength / 2;
	}

	CString strSamplesPlayed;
	strSamplesPlayed.Format(_T("Samples Played: %d \n"), dwSamplesPlayed);
	OutputDebugString(strSamplesPlayed);

	return dwSamplesPlayed;
	}
	//</GetSamplePlaying>

	void AudioDirectSound::SetCallback(LPGETAUDIOSAMPLES_PROGRESS Function_Callback, LPVOID lpData)
	{
	m_lpGETAUDIOSAMPLES = Function_Callback;
	m_lpData = lpData;
	}
	//</SetCallback>

	void AudioDirectSound::TimerCallback()
	{
	LPVOID lpvAudio1 = NULL, lpvAudio2 = NULL;
	DWORD dwBytesAudio1 = 0, dwBytesAudio2 = 0;
	DWORD dwRetSamples = 0, dwRetBytes = 0;

	HRESULT hr = WaitForMultipleObjects(2, m_pHEvent, FALSE, 0);
	if(WAIT_OBJECT_0 == hr) {

	m_dwCircles1++;

	//Lock DirectSoundBuffer Second Part
	HRESULT hr = m_lpDSB->Lock(bufferLength * 2, bufferLength * 2,
	&lpvAudio1, &dwBytesAudio1, &lpvAudio2, &dwBytesAudio2, 0);
	if ( FAILED(hr) ) {
	m_strLastError = _T("Lock DirectSoundBuffer Failed!");
	OutputDebugString(m_strLastError);
	return;
	}
	} else if (WAIT_OBJECT_0 + 1 == hr) {

	m_dwCircles2++;

	//Lock DirectSoundBuffer First Part
	HRESULT hr = m_lpDSB->Lock(0, bufferLength * 2, &lpvAudio1, &dwBytesAudio1,
	&lpvAudio2, &dwBytesAudio2, 0);
	if ( FAILED(hr) ) {
	m_strLastError = _T("Lock DirectSoundBuffer Failed!");
	OutputDebugString(m_strLastError);
	return;
	}
	} else {
	return;
	}

	// Fill audio buffer via callback function
	m_lpGETAUDIOSAMPLES(m_lpAudioBuf, bufferLength * 2, dwRetSamples, m_lpData);

	//Copy AudioBuffer to DirectSoundBuffer
	if (NULL == lpvAudio2) {
	memcpy(lpvAudio1, m_lpAudioBuf, dwBytesAudio1);
	} else {
	memcpy(lpvAudio1, m_lpAudioBuf, dwBytesAudio1);
	memcpy(lpvAudio2, m_lpAudioBuf + dwBytesAudio1, dwBytesAudio2);
	}

	//Unlock DirectSoundBuffer
	m_lpDSB->Unlock(lpvAudio1, dwBytesAudio1, lpvAudio2, dwBytesAudio2);
	}
	//</TimerCallback>