//-----------------------------------------------------------------------------
// Name: OnPlaySound()
// Desc: User hit the "Play" button
//-----------------------------------------------------------------------------
HRESULT OnPlaySound( HWND hDlg )
{
HRESULT hr;
HWND hLoopButton = GetDlgItem( hDlg, IDC_LOOP_CHECK );
BOOL bLooped = ( SendMessage( hLoopButton, BM_GETSTATE, 0, 0 ) == BST_CHECKED );
if( g_bBufferPaused )
{
// Play the buffer since it is currently paused
DWORD dwFlags = bLooped ? DSBPLAY_LOOPING : 0L;
if( FAILED( hr = g_pSound->Play( 0, dwFlags ) ) )
return DXTRACE_ERR( TEXT("Play"), hr );
// Update the UI controls to show the sound as playing
g_bBufferPaused = FALSE;
EnablePlayUI( hDlg, FALSE );
}
else
{
if( g_pSound->IsSoundPlaying() )
{
// To pause, just stop the buffer, but don't reset the position
if( g_pSound )
g_pSound->Stop();
g_bBufferPaused = TRUE;
SetDlgItemText( hDlg, IDC_PLAY, "Play" );
}
else
{
// The buffer is not playing, so play it again
DWORD dwFlags = bLooped ? DSBPLAY_LOOPING : 0L;
if( FAILED( hr = g_pSound->Play( 0, dwFlags ) ) )
return DXTRACE_ERR( TEXT("Play"), hr );
// Update the UI controls to show the sound as playing
g_bBufferPaused = FALSE;
EnablePlayUI( hDlg, FALSE );
}
}
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: OnTimer()
// Desc: When we think the sound is playing this periodically checks to see if
// the sound has stopped. If it has then updates the dialog.
//-----------------------------------------------------------------------------
VOID OnTimer( HWND hDlg )
{
if( IsWindowEnabled( GetDlgItem( hDlg, IDC_STOP ) ) )
{
// We think the sound is playing, so see if it has stopped yet.
if( !g_pSound->IsSoundPlaying() )
{
// Update the UI controls to show the sound as stopped
EnablePlayUI( hDlg, TRUE );
}
}
}
//-----------------------------------------------------------------------------
// Name: ValidateWaveFile()
// Desc: Open the wave file with the helper
// class CWaveFile to make sure it is valid
//-----------------------------------------------------------------------------
VOID ValidateWaveFile( HWND hDlg, TCHAR* strFileName )
{
HRESULT hr;
CWaveFile waveFile;
// Verify the file is small
HANDLE hFile = CreateFile( strFileName, 0, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if( hFile != NULL )
{
// If you try to open a 100MB wav file, you could run out of system memory with this
// sample cause it puts all of it into a large buffer. If you need to do this, then
// see the "StreamData" sample to stream the data from the file into a sound buffer.
DWORD dwFileSizeHigh = 0;
DWORD dwFileSize = GetFileSize( hFile, &dwFileSizeHigh );
CloseHandle( hFile );
if( dwFileSizeHigh != 0 || dwFileSize > 1000000 )
{
waveFile.Close();
SetDlgItemText( hDlg, IDC_STATUS, TEXT("File too large. You should stream large files.") );
return;
}
}
// Load the wave file
if( FAILED( hr = waveFile.Open( strFileName, NULL, WAVEFILE_READ ) ) )
{
DXTRACE_ERR_MSGBOX( TEXT("Open"), hr );
waveFile.Close();
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Bad wave file.") );
}
else // The load call succeeded
{
// Update the UI controls to show the sound as the file is loaded
waveFile.Close();
EnablePlayUI( hDlg, TRUE );
SetDlgItemText( hDlg, IDC_FILENAME, strFileName );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("File loaded.") );
strcpy( m_strWaveFileName, strFileName );
// Get the samples per sec from the wave file
DWORD dwSamplesPerSec = waveFile.m_pwfx->nSamplesPerSec;
// Set the slider positions
SetSlidersPos( hDlg, dwSamplesPerSec, 0, 0 );
}
}
//-----------------------------------------------------------------------------
// Name: OnPlaySound()
// Desc: User hit the "Play" button
//-----------------------------------------------------------------------------
HRESULT OnPlaySound( HWND hDlg )
{
HRESULT hr;
if( NULL == g_pSound )
return E_FAIL;
// Play buffer always in looped mode just for this sample
if( FAILED( hr = g_pSound->Play( 0, DSBPLAY_LOOPING ) ) )
return DXTRACE_ERR( TEXT("Play"), hr );
// Update the UI controls to show the sound as playing
EnablePlayUI( hDlg, FALSE );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Sound playing.") );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: ValidateWaveFile()
// Desc: Open the wave file with the helper
// class CWaveFile to make sure it is valid
//-----------------------------------------------------------------------------
HRESULT ValidateWaveFile( HWND hDlg, TCHAR* strFileName )
{
HRESULT hr;
CWaveFile waveFile;
if( -1 == GetFileAttributes(strFileName) )
return E_FAIL;
// Load the wave file
if( FAILED( hr = waveFile.Open( strFileName, NULL, WAVEFILE_READ ) ) )
{
waveFile.Close();
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Bad wave file.") );
return DXTRACE_ERR( TEXT("Open"), hr );
}
else // The load call succeeded
{
WAVEFORMATEX* pwfx = waveFile.GetFormat();
if( pwfx->wFormatTag != WAVE_FORMAT_PCM )
{
// Sound must be PCM when using DSBCAPS_CTRLFX
SAFE_RELEASE( g_pIGargle );
SAFE_DELETE( g_pSound );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Wave file must be PCM for effects control.") );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
return S_FALSE;
}
// Update the UI controls to show the sound as the file is loaded
waveFile.Close();
EnablePlayUI( hDlg, TRUE );
SetDlgItemText( hDlg, IDC_FILENAME, strFileName );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("File loaded.") );
strcpy( g_strWaveFileName, strFileName );
// Get the samples per sec from the wave file
DWORD dwSamplesPerSec = waveFile.m_pwfx->nSamplesPerSec;
return S_OK;
}
}
//-----------------------------------------------------------------------------
// Name: MainDlgProc()
// Desc: Handles dialog messages
//-----------------------------------------------------------------------------
INT_PTR CALLBACK MainDlgProc( HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam )
{
HRESULT hr;
switch( msg )
{
case WM_INITDIALOG:
OnInitDialog( hDlg );
break;
case WM_COMMAND:
switch( LOWORD(wParam) )
{
case IDC_SOUNDFILE:
OnOpenSoundFile( hDlg );
break;
case IDCANCEL:
EndDialog( hDlg, IDCANCEL );
break;
case IDC_PLAY:
// The 'play'/'pause' button was pressed
if( FAILED( hr = OnPlaySound( hDlg ) ) )
{
DXTRACE_ERR_MSGBOX( TEXT("OnPlaySound"), hr );
MessageBox( hDlg, "Error playing DirectSound buffer. "
"Sample will now exit.", "DirectSound Sample",
MB_OK | MB_ICONERROR );
EndDialog( hDlg, IDABORT );
}
break;
case IDC_STOP:
if( g_pSound )
{
g_pSound->Stop();
g_pSound->Reset();
}
EnablePlayUI( hDlg, TRUE );
break;
case IDHELP:
DXUtil_LaunchReadme( hDlg );
break;
default:
return FALSE; // Didn't handle message
}
break;
case WM_TIMER:
OnTimer( hDlg );
break;
case WM_DESTROY:
// Cleanup everything
KillTimer( hDlg, 1 );
SAFE_DELETE( g_pSound );
SAFE_DELETE( g_pSoundManager );
break;
default:
return FALSE; // Didn't handle message
}
return TRUE; // Handled message
}
//-----------------------------------------------------------------------------
// Name: OnOpenSoundFile()
// Desc: Called when the user requests to open a sound file
//-----------------------------------------------------------------------------
VOID OnOpenSoundFile( HWND hDlg )
{
HRESULT hr;
static TCHAR strFileName[MAX_PATH] = TEXT("");
static TCHAR strPath[MAX_PATH] = TEXT("");
// Setup the OPENFILENAME structure
OPENFILENAME ofn = { sizeof(OPENFILENAME), hDlg, NULL,
TEXT("Wave Files\0*.wav\0All Files\0*.*\0\0"), NULL,
0, 1, strFileName, MAX_PATH, NULL, 0, strPath,
TEXT("Open Sound File"),
OFN_FILEMUSTEXIST|OFN_HIDEREADONLY, 0, 0,
TEXT(".wav"), 0, NULL, NULL };
// Get the default media path (something like C:\WINDOWS\MEDIA)
if( '\0' == strPath[0] )
{
if( GetWindowsDirectory( strPath, MAX_PATH ) != 0 )
{
if( strcmp( &strPath[strlen(strPath)], TEXT("\\") ) )
strcat( strPath, TEXT("\\") );
strcat( strPath, TEXT("MEDIA") );
}
}
if( g_pSound )
{
g_pSound->Stop();
g_pSound->Reset();
}
// Update the UI controls to show the sound as loading a file
EnableWindow( GetDlgItem( hDlg, IDC_PLAY ), FALSE);
EnableWindow( GetDlgItem( hDlg, IDC_STOP ), FALSE);
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("Loading file...") );
// Display the OpenFileName dialog. Then, try to load the specified file
if( TRUE != GetOpenFileName( &ofn ) )
{
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("Load aborted.") );
return;
}
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
// Free any previous sound, and make a new one
SAFE_DELETE( g_pSound );
// Verify the file is small
HANDLE hFile = CreateFile( strFileName, 0, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if( hFile != NULL )
{
// If you try to open a 100MB wav file, you could run out of system memory with this
// sample cause it puts all of it into a large buffer. If you need to do this, then
// see the "StreamData" sample to stream the data from the file into a sound buffer.
DWORD dwFileSizeHigh = 0;
DWORD dwFileSize = GetFileSize( hFile, &dwFileSizeHigh );
CloseHandle( hFile );
if( dwFileSizeHigh != 0 || dwFileSize > 1000000 )
{
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("File too large. You should stream large files.") );
return;
}
}
// Load the wave file into a DirectSound buffer
if( FAILED( hr = g_pSoundManager->Create( &g_pSound, strFileName, 0, GUID_NULL ) ) )
{
// Not a critical failure, so just update the status
DXTRACE_ERR( TEXT("Create"), hr );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("Could not create sound buffer.") );
return;
}
// Update the UI controls to show the sound as the file is loaded
SetDlgItemText( hDlg, IDC_FILENAME, strFileName );
EnablePlayUI( hDlg, TRUE );
// Remember the path for next time
strcpy( strPath, strFileName );
char* strLastSlash = strrchr( strPath, '\\' );
if( strLastSlash )
strLastSlash[0] = '\0';
}
//-----------------------------------------------------------------------------
// Name: OnPlaySound()
// Desc: User hit the "Play" button
//-----------------------------------------------------------------------------
HRESULT OnPlaySound( HWND hDlg )
{
HRESULT hr;
DWORD dwCreationFlags;
DWORD dwResults;
LPDIRECTSOUNDBUFFER pDSB = NULL;
LPDIRECTSOUNDBUFFER8 pDSB8 = NULL;
BOOL bLooped = ( IsDlgButtonChecked( hDlg, IDC_LOOP_CHECK ) == BST_CHECKED );
// We would only use CTRLFX control on dsound buffer
dwCreationFlags = DSBCAPS_CTRLFX;
// Free any previous sound and FXs
SAFE_RELEASE( g_pIGargle );
SAFE_DELETE( g_pSound );
// Since the user can change the focus before the sound is played,
// we need to create the sound buffer every time the play button is pressed
// Load the wave file into a DirectSound buffer
if( FAILED( hr = g_pSoundManager->Create( &g_pSound, g_strWaveFileName, dwCreationFlags, GUID_NULL ) ) )
{
// Not a critical failure, so just update the status
DXTRACE_ERR_NOMSGBOX( TEXT("Create"), hr );
if( hr == DSERR_BUFFERTOOSMALL )
{
// DSERR_BUFFERTOOSMALL will be returned if the buffer is
// less than DSBSIZE_FX_MIN (100ms) and the buffer is created
// with DSBCAPS_CTRLFX.
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Wave file is too short (less than 100ms) for effect processing.") );
}
else
{
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Could not create sound buffer.") );
}
return S_FALSE;
}
// Query IDirectSoundBuffer8 interface
pDSB = g_pSound->GetBuffer( 0 );
if( FAILED( hr = pDSB->QueryInterface( IID_IDirectSoundBuffer8, (LPVOID*) &pDSB8 ) ) )
return DXTRACE_ERR( TEXT("QueryInterface"), hr );
// Set gargle effect on the IDirectSoundBuffer8
DSEFFECTDESC dsed;
ZeroMemory( &dsed, sizeof(DSEFFECTDESC) );
dsed.dwSize = sizeof(DSEFFECTDESC);
dsed.dwFlags = 0;
dsed.guidDSFXClass = GUID_DSFX_STANDARD_GARGLE;
if( FAILED( hr = pDSB8->SetFX( 1, &dsed, &dwResults ) ) )
{
// Not a critical failure, so just update the status
DXTRACE_ERR( TEXT("SetFX"), hr );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Could not set gargle effect.") );
return S_FALSE;
}
// Get gargle effect friendly interface
if( FAILED( hr = pDSB8->GetObjectInPath( GUID_DSFX_STANDARD_GARGLE, 0,
IID_IDirectSoundFXGargle,
(LPVOID*) &g_pIGargle ) ) )
return DXTRACE_ERR( TEXT("GetObjectInPath"), hr );
// Cleanup
SAFE_RELEASE( pDSB8 );
// Set the buffer options to what the sliders are set to
OnEffectChanged( hDlg );
// Play the sound
DWORD dwLooped = bLooped ? DSBPLAY_LOOPING : 0L;
if( FAILED( hr = g_pSound->Play( 0, dwLooped ) ) )
return DXTRACE_ERR( TEXT("Play"), hr );
// Update the UI controls to show the sound as playing
EnablePlayUI( hDlg, FALSE );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Sound playing.") );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: MainDlgProc()
// Desc: Handles dialog messages
//-----------------------------------------------------------------------------
INT_PTR CALLBACK MainDlgProc( HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam )
{
HRESULT hr;
switch( msg )
{
case WM_INITDIALOG:
OnInitDialog( hDlg );
break;
case WM_COMMAND:
switch( LOWORD(wParam) )
{
case IDC_SOUNDFILE:
OnOpenSoundFile( hDlg );
break;
case IDCANCEL:
EndDialog( hDlg, IDCANCEL );
break;
case IDC_PLAY:
if( FAILED( hr = OnPlaySound( hDlg ) ) )
{
DXTRACE_ERR( TEXT("OnPlaySound"), hr );
MessageBox( hDlg, "Error playing DirectSound buffer."
"Sample will now exit.", "DirectSound Sample",
MB_OK | MB_ICONERROR );
EndDialog( hDlg, IDABORT );
}
break;
case IDC_STOP:
if( g_pSound )
{
g_pSound->Stop();
g_pSound->Reset();
}
// Update the UI controls to show the sound as stopped
EnablePlayUI( hDlg, TRUE );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Sound stopped.") );
break;
case IDC_DEFER:
g_bDeferSettings = !g_bDeferSettings;
OnSliderChanged( hDlg );
break;
case IDC_APPLY:
// Call the IDirectSound3DListener::CommitDeferredSettings
// method to execute all of the deferred commands at once.
// This is many times more efficent than recomputing everything
// for every call.
if( g_pDSListener )
g_pDSListener->CommitDeferredSettings();
break;
default:
return FALSE; // Didn't handle message
}
break;
case WM_TIMER:
if( wParam == IDT_MOVEMENT_TIMER )
OnMovementTimer( hDlg );
break;
case WM_NOTIFY:
OnSliderChanged( hDlg );
break;
case WM_DESTROY:
// Cleanup everything
KillTimer( hDlg, 1 );
SAFE_RELEASE( g_pDSListener );
SAFE_RELEASE( g_pDS3DBuffer );
SAFE_DELETE( g_pSound );
SAFE_DELETE( g_pSoundManager );
break;
default:
return FALSE; // Didn't handle message
}
return TRUE; // Handled message
}
//-----------------------------------------------------------------------------
// Name: OnOpenSoundFile()
// Desc: Called when the user requests to open a sound file
//-----------------------------------------------------------------------------
VOID OnOpenSoundFile( HWND hDlg )
{
GUID guid3DAlgorithm = GUID_NULL;
int nResult;
HRESULT hr;
static TCHAR strFileName[MAX_PATH] = TEXT("");
static TCHAR strPath[MAX_PATH] = TEXT("");
// Setup the OPENFILENAME structure
OPENFILENAME ofn = { sizeof(OPENFILENAME), hDlg, NULL,
TEXT("Wave Files\0*.wav\0All Files\0*.*\0\0"), NULL,
0, 1, strFileName, MAX_PATH, NULL, 0, strPath,
TEXT("Open Sound File"),
OFN_FILEMUSTEXIST|OFN_HIDEREADONLY, 0, 0,
TEXT(".wav"), 0, NULL, NULL };
// Get the default media path (something like C:\WINDOWS\MEDIA)
if( '\0' == strPath[0] )
{
GetWindowsDirectory( strPath, MAX_PATH );
if( strcmp( &strPath[strlen(strPath)], TEXT("\\") ) )
strcat( strPath, TEXT("\\") );
strcat( strPath, TEXT("MEDIA") );
}
if( g_pSound )
{
g_pSound->Stop();
g_pSound->Reset();
}
// Update the UI controls to show the sound as loading a file
EnableWindow( GetDlgItem( hDlg, IDC_PLAY ), FALSE);
EnableWindow( GetDlgItem( hDlg, IDC_STOP ), FALSE);
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Loading file...") );
// Stop the timer while dialogs are displayed
g_bAllowMovementTimer = FALSE;
// Display the OpenFileName dialog. Then, try to load the specified file
if( TRUE != GetOpenFileName( &ofn ) )
{
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Load aborted.") );
g_bAllowMovementTimer = TRUE;
return;
}
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
// Free any previous sound, and make a new one
SAFE_DELETE( g_pSound );
CWaveFile waveFile;
waveFile.Open( strFileName, NULL, WAVEFILE_READ );
WAVEFORMATEX* pwfx = waveFile.GetFormat();
if( pwfx == NULL )
{
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Invalid wave file format.") );
return;
}
if( pwfx->nChannels > 1 )
{
// Too many channels in wave. Sound must be mono when using DSBCAPS_CTRL3D
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Wave file must be mono for 3D control.") );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
return;
}
if( pwfx->wFormatTag != WAVE_FORMAT_PCM )
{
// Sound must be PCM when using DSBCAPS_CTRL3D
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Wave file must be PCM for 3D control.") );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
return;
}
// Get the software DirectSound3D emulation algorithm to use
// Ask the user for this sample, so display the algorithm dialog box.
nResult = (int)DialogBox( NULL, MAKEINTRESOURCE(IDD_3D_ALGORITHM),
NULL, AlgorithmDlgProc );
switch( nResult )
{
case -1: // User canceled dialog box
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Load aborted.") );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
return;
case 0: // User selected DS3DALG_NO_VIRTUALIZATION
guid3DAlgorithm = DS3DALG_NO_VIRTUALIZATION;
break;
case 1: // User selected DS3DALG_HRTF_FULL
guid3DAlgorithm = DS3DALG_HRTF_FULL;
break;
case 2: // User selected DS3DALG_HRTF_LIGHT
guid3DAlgorithm = DS3DALG_HRTF_LIGHT;
break;
}
// Load the wave file into a DirectSound buffer
hr = g_pSoundManager->Create( &g_pSound, strFileName, DSBCAPS_CTRL3D, guid3DAlgorithm );
if( FAILED( hr ) || hr == DS_NO_VIRTUALIZATION )
{
DXTRACE_ERR_NOMSGBOX( TEXT("Create"), hr );
if( DS_NO_VIRTUALIZATION == hr )
{
MessageBox( hDlg, "The 3D virtualization algorithm requested is not supported under this "
"operating system. It is available only on Windows 2000, Windows ME, and Windows 98 with WDM "
"drivers and beyond. Creating buffer with no virtualization.",
"DirectSound Sample", MB_OK );
}
// Unknown error, but not a critical failure, so just update the status
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("Could not create sound buffer.") );
return;
}
// Get the 3D buffer from the secondary buffer
if( FAILED( hr = g_pSound->Get3DBufferInterface( 0, &g_pDS3DBuffer ) ) )
{
DXTRACE_ERR( TEXT("Get3DBufferInterface"), hr );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Could not get 3D buffer.") );
SetDlgItemText( hDlg, IDC_FILENAME, TEXT("") );
return;
}
// Get the 3D buffer parameters
g_dsBufferParams.dwSize = sizeof(DS3DBUFFER);
g_pDS3DBuffer->GetAllParameters( &g_dsBufferParams );
// Set new 3D buffer parameters
g_dsBufferParams.dwMode = DS3DMODE_HEADRELATIVE;
g_pDS3DBuffer->SetAllParameters( &g_dsBufferParams, DS3D_IMMEDIATE );
DSBCAPS dsbcaps;
ZeroMemory( &dsbcaps, sizeof(DSBCAPS) );
dsbcaps.dwSize = sizeof(DSBCAPS);
LPDIRECTSOUNDBUFFER pDSB = g_pSound->GetBuffer( 0 );
pDSB->GetCaps( &dsbcaps );
if( ( dsbcaps.dwFlags & DSBCAPS_LOCHARDWARE ) != 0 )
SetDlgItemText( hDlg, IDC_STATUS, TEXT("File loaded using hardware mixing.") );
else
SetDlgItemText( hDlg, IDC_STATUS, TEXT("File loaded using software mixing.") );
// Update the UI controls to show the sound as the file is loaded
SetDlgItemText( hDlg, IDC_FILENAME, strFileName );
EnablePlayUI( hDlg, TRUE );
g_bAllowMovementTimer = TRUE;
// Remember the path for next time
strcpy( strPath, strFileName );
char* strLastSlash = strrchr( strPath, '\\' );
strLastSlash[0] = '\0';
// Set the slider positions
SetSlidersPos( hDlg, 0.0f, 0.0f, ORBIT_MAX_RADIUS, ORBIT_MAX_RADIUS*2.0f );
OnSliderChanged( hDlg );
}
//-----------------------------------------------------------------------------
// Name: OnPlaySound()
// Desc: User hit the "Play" button
//-----------------------------------------------------------------------------
HRESULT OnPlaySound( HWND hDlg )
{
HRESULT hr;
DWORD dwCreationFlags;
BOOL bLooped = ( IsDlgButtonChecked( hDlg, IDC_LOOP_CHECK ) == BST_CHECKED );
BOOL bFocusSticky = ( IsDlgButtonChecked( hDlg, IDC_FOCUS_STICKY ) == BST_CHECKED );
BOOL bFocusGlobal = ( IsDlgButtonChecked( hDlg, IDC_FOCUS_GLOBAL ) == BST_CHECKED );
BOOL bMixHardware = ( IsDlgButtonChecked( hDlg, IDC_MIX_HARDWARE ) == BST_CHECKED );
BOOL bMixSoftware = ( IsDlgButtonChecked( hDlg, IDC_MIX_SOFTWARE ) == BST_CHECKED );
// Detrimine the creation flags to use based on the radio buttons
dwCreationFlags = 0;
if( bFocusGlobal )
dwCreationFlags |= DSBCAPS_GLOBALFOCUS;
if( bFocusSticky )
dwCreationFlags |= DSBCAPS_STICKYFOCUS;
if( bMixHardware )
dwCreationFlags |= DSBCAPS_LOCHARDWARE;
if( bMixSoftware )
dwCreationFlags |= DSBCAPS_LOCSOFTWARE;
// Add extra flags needed for the UI
dwCreationFlags |= DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY;
// Free any previous sound
SAFE_DELETE( g_pSound );
// Since the user can change the focus before the sound is played,
// we need to create the sound buffer every time the play button is pressed
// Load the wave file into a DirectSound buffer
if( FAILED( hr = g_pSoundManager->Create( &g_pSound, m_strWaveFileName, dwCreationFlags, GUID_NULL ) ) )
{
// Not a critical failure, so just update the status
DXTRACE_ERR( TEXT("Create"), hr );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Could not create sound buffer.") );
return S_FALSE;
}
// Set the buffer options to what the sliders are set to
OnSliderChanged( hDlg );
// Only if the sound buffer was created perfectly should we update the UI
// and play the sound
// Get the position of the sliders
HWND hFreqSlider = GetDlgItem( hDlg, IDC_FREQUENCY_SLIDER );
HWND hPanSlider = GetDlgItem( hDlg, IDC_PAN_SLIDER );
HWND hVolumeSlider = GetDlgItem( hDlg, IDC_VOLUME_SLIDER );
LONG lFrequency = (LONG)SendMessage( hFreqSlider, TBM_GETPOS, 0, 0 ) * 1L;
LONG lPan = (LONG)SendMessage( hPanSlider, TBM_GETPOS, 0, 0 ) * 500L;
LONG lVolume = (LONG)SendMessage( hVolumeSlider, TBM_GETPOS, 0, 0 ) * 100L;
// Play the sound
DWORD dwLooped = bLooped ? DSBPLAY_LOOPING : 0L;
if( FAILED( hr = g_pSound->Play( 0, dwLooped, lVolume, lFrequency, lPan ) ) )
return DXTRACE_ERR( TEXT("Play"), hr );
// Update the UI controls to show the sound as playing
EnablePlayUI( hDlg, FALSE );
SetDlgItemText( hDlg, IDC_STATUS, TEXT("Sound playing.") );
return S_OK;
}
