rlm@1: #include "stdafx.h"
rlm@1: #include <mmreg.h>
rlm@1: #include <dsound.h>
rlm@1: 
rlm@1: #include "resource.h"
rlm@1: #include "AVIWrite.h"
rlm@1: #include "Sound.h"
rlm@1: #include "WavWriter.h"
rlm@1: #include "VBA.h"
rlm@1: 
rlm@1: #include "../gba/GBAGlobals.h"
rlm@1: #include "../gba/GBASound.h"
rlm@1: #include "../common/nesvideos-piece.h"
rlm@1: 
rlm@1: extern void directXMessage(const char *);
rlm@1: 
rlm@1: class DirectSound : public ISound
rlm@1: {
rlm@1: private:
rlm@1: 	HINSTANCE			dsoundDLL;
rlm@1: 	LPDIRECTSOUND		pDirectSound;
rlm@1: 	LPDIRECTSOUNDBUFFER dsbPrimary;
rlm@1: 	LPDIRECTSOUNDBUFFER dsbSecondary;
rlm@1: 	LPDIRECTSOUNDNOTIFY dsbNotify;
rlm@1: 	HANDLE		 dsbEvent;
rlm@1: 	WAVEFORMATEX wfx;
rlm@1: 	float		 curRate;
rlm@1: public:
rlm@1: 	DirectSound();
rlm@1: 	virtual ~DirectSound();
rlm@1: 
rlm@1: 	bool init();
rlm@1: 	void pause();
rlm@1: 	void reset();
rlm@1: 	void resume();
rlm@1: 	void write();
rlm@1: 	void setSpeed(float rate);
rlm@1: 	bool isPlaying();
rlm@1: 	void clearAudioBuffer();
rlm@1: };
rlm@1: 
rlm@1: DirectSound::DirectSound()
rlm@1: {
rlm@1: 	dsoundDLL	 = NULL;
rlm@1: 	pDirectSound = NULL;
rlm@1: 	dsbPrimary	 = NULL;
rlm@1: 	dsbSecondary = NULL;
rlm@1: 	dsbNotify	 = NULL;
rlm@1: 	dsbEvent	 = NULL;
rlm@1: }
rlm@1: 
rlm@1: DirectSound::~DirectSound()
rlm@1: {
rlm@1: 	if (theApp.aviRecorder != NULL)
rlm@1: 	{
rlm@1: 		delete theApp.aviRecorder;
rlm@1: 		theApp.aviRecorder	= NULL;
rlm@1: 		theApp.aviRecording = false;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (theApp.soundRecording)
rlm@1: 	{
rlm@1: 		if (theApp.soundRecorder != NULL)
rlm@1: 		{
rlm@1: 			delete theApp.soundRecorder;
rlm@1: 			theApp.soundRecorder = NULL;
rlm@1: 		}
rlm@1: 		theApp.soundRecording = false;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (dsbNotify != NULL)
rlm@1: 	{
rlm@1: 		dsbNotify->Release();
rlm@1: 		dsbNotify = NULL;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (dsbEvent != NULL)
rlm@1: 	{
rlm@1: 		CloseHandle(dsbEvent);
rlm@1: 		dsbEvent = NULL;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (pDirectSound != NULL)
rlm@1: 	{
rlm@1: 		if (dsbPrimary != NULL)
rlm@1: 		{
rlm@1: 			dsbPrimary->Release();
rlm@1: 			dsbPrimary = NULL;
rlm@1: 		}
rlm@1: 
rlm@1: 		if (dsbSecondary != NULL)
rlm@1: 		{
rlm@1: 			dsbSecondary->Release();
rlm@1: 			dsbSecondary = NULL;
rlm@1: 		}
rlm@1: 
rlm@1: 		pDirectSound->Release();
rlm@1: 		pDirectSound = NULL;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (dsoundDLL != NULL)
rlm@1: 	{
rlm@1: 		FreeLibrary(dsoundDLL);
rlm@1: 		dsoundDLL = NULL;
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: bool DirectSound::init()
rlm@1: {
rlm@1: 	HRESULT hr;
rlm@1: 
rlm@1: 	dsoundDLL = LoadLibrary("DSOUND.DLL");
rlm@1: 	HRESULT (WINAPI *DSoundCreate)(LPCGUID, LPDIRECTSOUND *, IUnknown *);
rlm@1: 	if (dsoundDLL != NULL)
rlm@1: 	{
rlm@1: 		DSoundCreate = (HRESULT (WINAPI *)(LPCGUID, LPDIRECTSOUND *, IUnknown *))
rlm@1: 		               GetProcAddress(dsoundDLL, "DirectSoundCreate");
rlm@1: 
rlm@1: 		if (DSoundCreate == NULL)
rlm@1: 		{
rlm@1: 			directXMessage("DirectSoundCreate");
rlm@1: 			return false;
rlm@1: 		}
rlm@1: 	}
rlm@1: 	else
rlm@1: 	{
rlm@1: 		directXMessage("DSOUND.DLL");
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (FAILED(hr = DSoundCreate(NULL, &pDirectSound, NULL)))
rlm@1: 	{
rlm@1: 		//    errorMessage(myLoadString(IDS_ERROR_SOUND_CREATE), hr);
rlm@1: 		systemMessage(IDS_CANNOT_CREATE_DIRECTSOUND,
rlm@1: 		              "Cannot create DirectSound %08x", hr);
rlm@1: 		pDirectSound = NULL;
rlm@1: 		dsbSecondary = NULL;
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (FAILED(hr = pDirectSound->SetCooperativeLevel((HWND)*theApp.m_pMainWnd, DSSCL_EXCLUSIVE)))
rlm@1: 	{
rlm@1: 		//    errorMessage(myLoadString(IDS_ERROR_SOUND_LEVEL), hr);
rlm@1: 		systemMessage(IDS_CANNOT_SETCOOPERATIVELEVEL,
rlm@1: 		              "Cannot SetCooperativeLevel %08x", hr);
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	DSBUFFERDESC dsbdesc;
rlm@1: 	ZeroMemory(&dsbdesc, sizeof(DSBUFFERDESC));
rlm@1: 	dsbdesc.dwSize	= sizeof(DSBUFFERDESC);
rlm@1: 	dsbdesc.dwFlags = DSBCAPS_PRIMARYBUFFER;
rlm@1: 
rlm@1: 	if (FAILED(hr = pDirectSound->CreateSoundBuffer(&dsbdesc, &dsbPrimary, NULL)))
rlm@1: 	{
rlm@1: 		//    errorMessage(myLoadString(IDS_ERROR_SOUND_BUFFER),hr);
rlm@1: 		systemMessage(IDS_CANNOT_CREATESOUNDBUFFER,
rlm@1: 		              "Cannot CreateSoundBuffer %08x", hr);
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	// Set primary buffer format
rlm@1: 
rlm@1: 	memset(&wfx, 0, sizeof(WAVEFORMATEX));
rlm@1: 	wfx.wFormatTag = WAVE_FORMAT_PCM;
rlm@1: 	wfx.nChannels  = 2;
rlm@1: 	switch (soundQuality)
rlm@1: 	{
rlm@1: 	case 2:
rlm@1: 		wfx.nSamplesPerSec	= 22050;
rlm@1: 		soundBufferLen		= 736 * 2;
rlm@1: 		soundBufferTotalLen = 7360 * 2;
rlm@1: 		break;
rlm@1: 	case 4:
rlm@1: 		wfx.nSamplesPerSec	= 11025;
rlm@1: 		soundBufferLen		= 368 * 2;
rlm@1: 		soundBufferTotalLen = 3680 * 2;
rlm@1: 		break;
rlm@1: 	default:
rlm@1: 		soundQuality		= 1;
rlm@1: 		wfx.nSamplesPerSec	= 44100;
rlm@1: 		soundBufferLen		= 1470 * 2;
rlm@1: 		soundBufferTotalLen = 14700 * 2;
rlm@1: 	}
rlm@1: 	wfx.wBitsPerSample	= 16;
rlm@1: 	wfx.nBlockAlign		= (wfx.wBitsPerSample / 8) * wfx.nChannels;
rlm@1: 	wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
rlm@1: 
rlm@1: 	if (FAILED(hr = dsbPrimary->SetFormat(&wfx)))
rlm@1: 	{
rlm@1: 		//    errorMessage(myLoadString(IDS_ERROR_SOUND_PRIMARY),hr);
rlm@1: 		systemMessage(IDS_CANNOT_SETFORMAT_PRIMARY,
rlm@1: 		              "Cannot SetFormat for primary %08x", hr);
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	ZeroMemory(&dsbdesc, sizeof(DSBUFFERDESC));
rlm@1: 	dsbdesc.dwSize		  = sizeof(DSBUFFERDESC);
rlm@1: 	dsbdesc.dwFlags		  = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS_CTRLFREQUENCY | DSBCAPS_GLOBALFOCUS;
rlm@1: 	dsbdesc.dwBufferBytes = soundBufferTotalLen;
rlm@1: 	dsbdesc.lpwfxFormat	  = &wfx;
rlm@1: 
rlm@1: 	if (FAILED(hr = pDirectSound->CreateSoundBuffer(&dsbdesc, &dsbSecondary, NULL)))
rlm@1: 	{
rlm@1: 		bool ok = false;
rlm@1: 		while (dsbdesc.dwFlags != DSBCAPS_GETCURRENTPOSITION2)
rlm@1: 		{
rlm@1: 			if (dsbdesc.dwFlags & DSBCAPS_CTRLFREQUENCY)
rlm@1: 				dsbdesc.dwFlags ^= DSBCAPS_CTRLFREQUENCY;
rlm@1: 			else if (dsbdesc.dwFlags & DSBCAPS_GLOBALFOCUS)
rlm@1: 				dsbdesc.dwFlags ^= DSBCAPS_GLOBALFOCUS;
rlm@1: 			else if (dsbdesc.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY)
rlm@1: 				dsbdesc.dwFlags ^= DSBCAPS_CTRLPOSITIONNOTIFY;
rlm@1: 			if (SUCCEEDED(hr = pDirectSound->CreateSoundBuffer(&dsbdesc, &dsbSecondary, NULL)))
rlm@1: 			{
rlm@1: 				ok = true;
rlm@1: 				break;
rlm@1: 			}
rlm@1: 		}
rlm@1: 		if (!ok)
rlm@1: 		{
rlm@1: 			systemMessage(IDS_CANNOT_CREATESOUNDBUFFER_SEC, "Cannot CreateSoundBuffer secondary %08x", hr);
rlm@1: 			return false;
rlm@1: 		}
rlm@1: 
rlm@1: 		dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
rlm@1: 	}
rlm@1: 
rlm@1: 	dsbSecondary->SetCurrentPosition(0);
rlm@1: 
rlm@1: 	if (!theApp.useOldSync)
rlm@1: 	{
rlm@1: 		hr = dsbSecondary->QueryInterface(IID_IDirectSoundNotify,
rlm@1: 		                                  (void * *)&dsbNotify);
rlm@1: 		if (!FAILED(hr))
rlm@1: 		{
rlm@1: 			dsbEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
rlm@1: 
rlm@1: 			DSBPOSITIONNOTIFY notify[10];
rlm@1: 
rlm@1: 			for (int i = 0; i < 10; i++)
rlm@1: 			{
rlm@1: 				notify[i].dwOffset	   = i * soundBufferLen;
rlm@1: 				notify[i].hEventNotify = dsbEvent;
rlm@1: 			}
rlm@1: 			if (FAILED(dsbNotify->SetNotificationPositions(10, notify)))
rlm@1: 			{
rlm@1: 				dsbNotify->Release();
rlm@1: 				dsbNotify = NULL;
rlm@1: 				CloseHandle(dsbEvent);
rlm@1: 				dsbEvent = NULL;
rlm@1: 			}
rlm@1: 		}
rlm@1: 	}
rlm@1: 
rlm@1: 	hr = dsbPrimary->Play(0, 0, DSBPLAY_LOOPING);
rlm@1: 
rlm@1: 	if (FAILED(hr))
rlm@1: 	{
rlm@1: 		//    errorMessage(myLoadString(IDS_ERROR_SOUND_PLAYPRIM), hr);
rlm@1: 		systemMessage(IDS_CANNOT_PLAY_PRIMARY, "Cannot Play primary %08x", hr);
rlm@1: 		return false;
rlm@1: 	}
rlm@1: 
rlm@1: 	systemSoundOn = true;
rlm@1: 
rlm@1: 	return true;
rlm@1: }
rlm@1: 
rlm@1: void DirectSound::setSpeed(float rate)
rlm@1: {
rlm@1: 	if (dsbSecondary == NULL || wfx.nSamplesPerSec <= 0)
rlm@1: 		return;
rlm@1: 
rlm@1: 	if (rate != curRate)
rlm@1: 	{
rlm@1: 		curRate = rate;
rlm@1: 
rlm@1: 		if (rate > 4.0f)
rlm@1: 			rate = 4.0f;
rlm@1: 		if (rate < 0.06f)
rlm@1: 			rate = 0.06f;
rlm@1: 
rlm@1: 		dsbSecondary->SetFrequency((DWORD)((float)wfx.nSamplesPerSec * rate));
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: void DirectSound::pause()
rlm@1: {
rlm@1: 	if (dsbSecondary != NULL)
rlm@1: 	{
rlm@1: 		DWORD status = 0;
rlm@1: 		dsbSecondary->GetStatus(&status);
rlm@1: 
rlm@1: 		if (status & DSBSTATUS_PLAYING)
rlm@1: 		{
rlm@1: 			//systemScreenMessage("sound stopped (pause)!", 3);
rlm@1: 			dsbSecondary->Stop();
rlm@1: 		}
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: bool DirectSound::isPlaying()
rlm@1: {
rlm@1: 	if (dsbSecondary != NULL)
rlm@1: 	{
rlm@1: 		DWORD status = 0;
rlm@1: 		dsbSecondary->GetStatus(&status);
rlm@1: 
rlm@1: 		if (status & DSBSTATUS_PLAYING)
rlm@1: 		{
rlm@1: 			return true;
rlm@1: 		}
rlm@1: 	}
rlm@1: 	return false;
rlm@1: }
rlm@1: 
rlm@1: void DirectSound::reset()
rlm@1: {
rlm@1: 	if (dsbSecondary)
rlm@1: 	{
rlm@1: 		//systemScreenMessage("sound stopped (reset)!", 3);
rlm@1: 		dsbSecondary->Stop();
rlm@1: 		dsbSecondary->SetCurrentPosition(0);
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: void DirectSound::resume()
rlm@1: {
rlm@1: 	if (dsbSecondary != NULL)
rlm@1: 	{
rlm@1: 		dsbSecondary->Play(0, 0, DSBPLAY_LOOPING);
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: long linearFrameCount	   = 0;
rlm@1: long linearSoundByteCount  = 0;
rlm@1: long linearSoundFrameCount = 0;
rlm@1: 
rlm@1: void DirectSound::write()
rlm@1: {
rlm@1: 	int	   len = soundBufferLen;
rlm@1: 	LPVOID lpvPtr1;
rlm@1: 	DWORD  dwBytes1;
rlm@1: 	LPVOID lpvPtr2;
rlm@1: 	DWORD  dwBytes2;
rlm@1: 
rlm@1: 	do
rlm@1: 	{
rlm@1: 		linearSoundByteCount += len;
rlm@1: 		if (wfx.nAvgBytesPerSec)
rlm@1: 			linearSoundFrameCount = 60 * linearSoundByteCount / wfx.nAvgBytesPerSec;
rlm@1: 
rlm@1: 		if (pDirectSound != NULL)
rlm@1: 		{
rlm@1: 			if (theApp.soundRecording)
rlm@1: 			{
rlm@1: 				if (dsbSecondary)
rlm@1: 				{
rlm@1: 					if (theApp.soundRecorder == NULL)
rlm@1: 					{
rlm@1: 						theApp.soundRecorder = new WavWriter;
rlm@1: 						WAVEFORMATEX format;
rlm@1: 						dsbSecondary->GetFormat(&format, sizeof(format), NULL);
rlm@1: 						if (theApp.soundRecorder->Open(theApp.soundRecordName))
rlm@1: 							theApp.soundRecorder->SetFormat(&format);
rlm@1: 					}
rlm@1: 				}
rlm@1: 
rlm@1: 				if (theApp.soundRecorder)
rlm@1: 				{
rlm@1: 					theApp.soundRecorder->AddSound((u8 *)soundFinalWave, len);
rlm@1: 				}
rlm@1: 			}
rlm@1: 
rlm@1: 			if (theApp.nvAudioLog)
rlm@1: 			{
rlm@1: 				NESVideoLoggingAudio((u8 *)soundFinalWave, wfx.nSamplesPerSec, wfx.wBitsPerSample, wfx.nChannels, len /
rlm@1: 				                     (wfx.nChannels * (wfx.wBitsPerSample / 8)));
rlm@1: 			}
rlm@1: 
rlm@1: 			// alternate avi record routine has been added in VBA.cpp
rlm@1: 			if (!theApp.altAviRecordMethod && theApp.aviRecording)
rlm@1: 			{
rlm@1: 				if (theApp.aviRecorder && !theApp.aviRecorder->IsPaused())
rlm@1: 				{
rlm@1: 					if (dsbSecondary)
rlm@1: 					{
rlm@1: 						if (!theApp.aviRecorder->IsSoundAdded())
rlm@1: 						{
rlm@1: 							WAVEFORMATEX format;
rlm@1: 							dsbSecondary->GetFormat(&format, sizeof(format), NULL);
rlm@1: 							theApp.aviRecorder->SetSoundFormat(&format);
rlm@1: 						}
rlm@1: 					}
rlm@1: 
rlm@1: 					theApp.aviRecorder->AddSound((u8 *)soundFinalWave, len);
rlm@1: 				}
rlm@1: 			}
rlm@1: 		}
rlm@1: 	}
rlm@1: 	while (linearSoundFrameCount <= linearFrameCount);
rlm@1: 
rlm@1: 	// arbitrarily wrap counters at 10000 frames to avoid mismatching wrap-around freeze
rlm@1: 	if (linearSoundFrameCount > 10000 && linearFrameCount > 10000)
rlm@1: 	{
rlm@1: 		linearFrameCount	 -= 10000;
rlm@1: 		linearSoundByteCount -= wfx.nAvgBytesPerSec * 10000 / 60;
rlm@1: 		linearSoundFrameCount = 60 * linearSoundByteCount / wfx.nAvgBytesPerSec;
rlm@1: 	}
rlm@1: 
rlm@1: 	if (!pDirectSound)
rlm@1: 		return;
rlm@1: 
rlm@1: 	HRESULT hr;
rlm@1: 
rlm@1: 	bool fastForward = speedup;
rlm@1: #if (defined(WIN32) && !defined(SDL))
rlm@1: 	fastForward |= theApp.frameSearchSkipping;
rlm@1: #endif
rlm@1: 
rlm@1: 	// slows down emulator to match up with the sound speed
rlm@1: 	if (!fastForward && synchronize && !(theApp.throttle > 100 && theApp.accuratePitchThrottle)
rlm@1: 		&& theApp.throttle >= 6 && theApp.throttle <= 400)
rlm@1: 	{
rlm@1: 		DWORD status = 0;
rlm@1: 		hr = dsbSecondary->GetStatus(&status);
rlm@1: 		if (status & DSBSTATUS_PLAYING)
rlm@1: 		{
rlm@1: 			if (!soundPaused)
rlm@1: 			{
rlm@1: 				DWORD play;
rlm@1: 				while (true)
rlm@1: 				{
rlm@1: 					dsbSecondary->GetCurrentPosition(&play, NULL);
rlm@1: 
rlm@1: 					if (soundNextPosition + soundBufferLen < soundBufferTotalLen)
rlm@1: 					{
rlm@1: 						if (play < soundNextPosition
rlm@1: 						    || play > soundNextPosition + soundBufferLen)
rlm@1: 							break;
rlm@1: 					}
rlm@1: 					else
rlm@1: 					{
rlm@1: 						if (play < soundNextPosition
rlm@1: 						    && play > (soundNextPosition + soundBufferLen) % soundBufferTotalLen)
rlm@1: 							break;
rlm@1: 					}
rlm@1: 
rlm@1: 					if (dsbEvent)
rlm@1: 					{
rlm@1: 						WaitForSingleObject(dsbEvent, 50);
rlm@1: 					}
rlm@1: 				}
rlm@1: 			}
rlm@1: 		}
rlm@1: 		else
rlm@1: 		{
rlm@1: 			soundPaused = 1;
rlm@1: 		}
rlm@1: 	}
rlm@1: 
rlm@1: 	// Obtain memory address of write block. This will be in two parts
rlm@1: 	// if the block wraps around.
rlm@1: 	hr = dsbSecondary->Lock(soundNextPosition, soundBufferLen,
rlm@1: 	                        &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2,
rlm@1: 	                        0);
rlm@1: 
rlm@1: 	if (FAILED(hr))
rlm@1: 	{
rlm@1: 		char str [256];
rlm@1: 		sprintf(str, "Locking secondary failed with %d", hr);
rlm@1: 		systemScreenMessage(str);
rlm@1: 	}
rlm@1: 
rlm@1: 	// If DSERR_BUFFERLOST is returned, restore and retry lock.
rlm@1: 	if (DSERR_BUFFERLOST == hr)
rlm@1: 	{
rlm@1: 		dsbSecondary->Restore();
rlm@1: 		hr = dsbSecondary->Lock(soundNextPosition, soundBufferLen,
rlm@1: 		                        &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2,
rlm@1: 		                        0);
rlm@1: 	}
rlm@1: 
rlm@1: 	if (SUCCEEDED(hr))
rlm@1: 	{
rlm@1: 		if (theApp.muteFrameAdvance && theApp.winPauseNextFrame || theApp.winMuteForNow)
rlm@1: 		{
rlm@1: 			// Write 0 to pointers.
rlm@1: 			if (NULL != lpvPtr1)
rlm@1: 				ZeroMemory(lpvPtr1, dwBytes1);
rlm@1: 			if (NULL != lpvPtr2)
rlm@1: 				ZeroMemory(lpvPtr2, dwBytes2);
rlm@1: 		}
rlm@1: 		else
rlm@1: 		{
rlm@1: 			// Write to pointers.
rlm@1: 			if (NULL != lpvPtr1)
rlm@1: 				CopyMemory(lpvPtr1, soundFinalWave, dwBytes1);
rlm@1: 			if (NULL != lpvPtr2)
rlm@1: 				CopyMemory(lpvPtr2, soundFinalWave + dwBytes1, dwBytes2);
rlm@1: 		}
rlm@1: 
rlm@1: 		// Release the data back to DirectSound.
rlm@1: 		hr = dsbSecondary->Unlock(lpvPtr1, dwBytes1, lpvPtr2,
rlm@1: 		                          dwBytes2);
rlm@1: 	}
rlm@1: 
rlm@1: 	soundNextPosition += soundBufferLen;
rlm@1: 	soundNextPosition %= soundBufferTotalLen;
rlm@1: }
rlm@1: 
rlm@1: void DirectSound::clearAudioBuffer()
rlm@1: {
rlm@1: 	LPVOID	lpvPtr1;
rlm@1: 	DWORD	dwBytes1;
rlm@1: 	LPVOID	lpvPtr2;
rlm@1: 	DWORD	dwBytes2;
rlm@1: 	HRESULT hr = dsbSecondary->Lock(0, soundBufferTotalLen, &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2, 0);
rlm@1: 	if (!FAILED(hr))
rlm@1: 	{
rlm@1: 		if (lpvPtr1)
rlm@1: 			memset(lpvPtr1, 0, dwBytes1);
rlm@1: 		if (lpvPtr2)
rlm@1: 			memset(lpvPtr2, 0, dwBytes2);
rlm@1: 		hr = dsbSecondary->Unlock(lpvPtr1, dwBytes1, lpvPtr2, dwBytes2);
rlm@1: 	}
rlm@1: }
rlm@1: 
rlm@1: ISound *newDirectSound()
rlm@1: {
rlm@1: 	return new DirectSound();
rlm@1: }
rlm@1: