int pest_open( HWND win ){
HMODULE lib;
DIRECTSOUNDCREATE dsound_create;
WAVEFORMATEX format;
DSBUFFERDESC desc_primary, desc_secondary;
lib = (HMODULE)LoadLibrary("dsound.dll");
if(lib==NULL) return FALSE;
dsound_create = (DIRECTSOUNDCREATE)GetProcAddress(lib, "DirectSoundCreate");
if(dsound_create==NULL) return FALSE;
FreeLibrary(lib);
if( dsound_create( NULL, &dsound, NULL )!= DS_OK ) return FALSE;
if( IDirectSound_SetCooperativeLevel( dsound, win, DSSCL_EXCLUSIVE | DSSCL_PRIORITY ) != DS_OK ) return FALSE;
memset( &desc_primary, 0, sizeof(DSBUFFERDESC) );
desc_primary.dwSize = sizeof(DSBUFFERDESC);
desc_primary.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_STICKYFOCUS;
if(IDirectSound_CreateSoundBuffer( dsound, &desc_primary, &primary, NULL )!=DS_OK) return FALSE;
memset( &format, 0, sizeof(WAVEFORMATEX) );
format.wFormatTag = WAVE_FORMAT_PCM;
format.nChannels = 2;
format.nSamplesPerSec = 44100;
format.nAvgBytesPerSec = 44100 * 4;
format.nBlockAlign = 4;
format.wBitsPerSample = 16;
if( IDirectSoundBuffer_SetFormat( primary, &format )!= DS_OK) return FALSE;
memset( &desc_secondary, 0, sizeof(DSBUFFERDESC) );
desc_secondary.dwSize = sizeof(DSBUFFERDESC);
desc_secondary.dwFlags = DSBCAPS_GLOBALFOCUS | DSBCAPS_GETCURRENTPOSITION2;
desc_secondary.lpwfxFormat = &format;
desc_secondary.dwBufferBytes = 2*2*BUFFER_LEN;
if(IDirectSound_CreateSoundBuffer( dsound, &desc_secondary, &secondary, NULL )!=DS_OK) return FALSE;
InitializeCriticalSection(&critical);
return TRUE;
}
bool AudioOutputDSoundPrivate::init()
{
if (!loadDll())
return false;
typedef HRESULT (WINAPI *DirectSoundCreateFunc)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
//typedef HRESULT (WINAPI *DirectSoundEnumerateFunc)(LPDSENUMCALLBACKA, LPVOID);
DirectSoundCreateFunc dsound_create = (DirectSoundCreateFunc)GetProcAddress(dll, "DirectSoundCreate");
//DirectSoundEnumerateFunc dsound_enumerate = (DirectSoundEnumerateFunc)GetProcAddress(dll, "DirectSoundEnumerateA");
if (!dsound_create) {
qWarning("Failed to resolve 'DirectSoundCreate'");
unloadDll();
return false;
}
if (FAILED(dsound_create(NULL/*dev guid*/, &dsound, NULL))){
unloadDll();
return false;
}
/* DSSCL_EXCLUSIVE: can modify the settings of the primary buffer, only the sound of this app will be hearable when it will have the focus.
*/
if (FAILED(dsound->SetCooperativeLevel(GetDesktopWindow(), DSSCL_EXCLUSIVE))) {
qWarning("Cannot set direct sound cooperative level");
SafeRelease(&dsound);
return false;
}
qDebug("DirectSound initialized.");
DSCAPS dscaps;
memset(&dscaps, 0, sizeof(DSCAPS));
dscaps.dwSize = sizeof(DSCAPS);
if (FAILED(dsound->GetCaps(&dscaps))) {
qWarning("Cannot get device capabilities.");
SafeRelease(&dsound);
return false;
}
if (dscaps.dwFlags & DSCAPS_EMULDRIVER)
qDebug("DirectSound is emulated");
write_offset = 0;
return true;
}
