C++ IDirectSoundBuffer8::Play方法代码示例

void VDAudioOutputDirectSoundW32::StartPlayback() {
	if (!mbDSBufferPlaying) {
		if (mpDSBuffer)
			mpDSBuffer->Play(0, 0, DSBPLAY_LOOPING);

		mbDSBufferPlaying = true;
	}
}

void SoundLibrary3dDirectSound::DisableDspFX( int _channel )
{
    int errCode;

	AppDebugAssert(GetNumFilters(_channel) > 0);

   	DirectSoundChannel *channel;
	if (_channel == m_musicChannelId) channel = m_musicChannel;
	else				channel = &m_channels[_channel];

	IDirectSoundBuffer8 *buffer = (IDirectSoundBuffer8 *) channel->m_bufferInterface;

	
    //
    // Stop the channel

    errCode = buffer->Stop();
    SOUNDASSERT( errCode, "Direct sound couldn't stop a secondary buffer" );

    
    //
    // Shut down the filters

	int numDxFilters = 0;
	for (int i = 0; i < NUM_FILTERS; ++i)
	{
		SoundLibFilter *filter = &channel->m_dspFX[i];
		if (filter->m_userFilter != NULL)
		{
			delete filter->m_userFilter; 
            filter->m_userFilter = NULL;
		}
		else if (filter->m_dxFilter)
		{
			numDxFilters++;
		}
		filter->m_dxFilter = false;
	}
	if (numDxFilters > 0)
	{
		errCode = buffer->SetFX( 0, NULL, NULL );
        SOUNDASSERT( errCode, "Direct sound couldn't set fx" );
	}

    
    //
    // Restart the channel

    errCode = buffer->Play( 0, 0,  DSBPLAY_LOOPING );
    SOUNDASSERT( errCode, "Direct sound couldn't play a secondary buffer" );    
}

	s32 Init()
	{
		numBuffers = Config_DSoundOut.NumBuffers;

		//
		// Initialize DSound
		//
		GUID cGuid;

		try
		{
			if( Config_DSoundOut.Device.empty() )
				throw std::runtime_error( "screw it" );
			
			// Convert from unicode to ANSI:
			char guid[256];
			sprintf_s( guid, "%S", Config_DSoundOut.Device.c_str() );
			
			if( (FAILED(GUIDFromString( guid, &cGuid ))) ||
				FAILED( DirectSoundCreate8(&cGuid,&dsound,NULL) ) )
					throw std::runtime_error( "try again?" );
		}
		catch( std::runtime_error& )
		{
			// if the GUID failed, just open up the default dsound driver:
			if( FAILED(DirectSoundCreate8(NULL,&dsound,NULL) ) )
				throw std::runtime_error( "DirectSound failed to initialize!" );
		}

		if( FAILED(dsound->SetCooperativeLevel(GetDesktopWindow(),DSSCL_PRIORITY)) )
			throw std::runtime_error( "DirectSound Error: Cooperative level could not be set." );
		
		// Determine the user's speaker configuration, and select an expansion option as needed.
		// FAIL : Directsound doesn't appear to support audio expansion >_<
		
		DWORD speakerConfig = 2;
		//dsound->GetSpeakerConfig( &speakerConfig );

		IDirectSoundBuffer* buffer_;
 		DSBUFFERDESC desc; 
	 
		// Set up WAV format structure. 
	 
		memset(&wfx, 0, sizeof(WAVEFORMATEX)); 
		wfx.wFormatTag		= WAVE_FORMAT_PCM;
		wfx.nSamplesPerSec	= SampleRate;
		wfx.nChannels		= (WORD)speakerConfig;
		wfx.wBitsPerSample	= 16;
		wfx.nBlockAlign		= 2*(WORD)speakerConfig;
		wfx.nAvgBytesPerSec	= SampleRate * wfx.nBlockAlign;
		wfx.cbSize			= 0;

		uint BufferSizeBytes = BufferSize * wfx.nBlockAlign;
	 
		// Set up DSBUFFERDESC structure. 
	 
		memset(&desc, 0, sizeof(DSBUFFERDESC)); 
		desc.dwSize = sizeof(DSBUFFERDESC); 
		desc.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_CTRLPOSITIONNOTIFY;// _CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY; 
		desc.dwBufferBytes = BufferSizeBytes * numBuffers;
		desc.lpwfxFormat = &wfx;
	 
		desc.dwFlags |= DSBCAPS_LOCSOFTWARE;
		desc.dwFlags |= DSBCAPS_GLOBALFOCUS;
	 
		if( FAILED(dsound->CreateSoundBuffer(&desc,&buffer_,0) ) )
			throw std::runtime_error( "DirectSound Error: Interface could not be queried." );
		
		if(	FAILED(buffer_->QueryInterface(IID_IDirectSoundBuffer8,(void**)&buffer)) )
			throw std::runtime_error( "DirectSound Error: Interface could not be queried." );

		buffer_->Release();
		verifyc( buffer->QueryInterface(IID_IDirectSoundNotify8,(void**)&buffer_notify) );

		DSBPOSITIONNOTIFY not[MAX_BUFFER_COUNT];
	 
		for(u32 i=0;i<numBuffers;i++)
		{
			// [Air] note: wfx.nBlockAlign modifier was *10 -- seems excessive to me but maybe
			// it was needed for some quirky driver?  Theoretically we want the notification as soon
			// as possible after the buffer has finished playing.

			buffer_events[i] = CreateEvent(NULL,FALSE,FALSE,NULL);
			not[i].dwOffset = (wfx.nBlockAlign + BufferSizeBytes*(i+1)) % desc.dwBufferBytes;
			not[i].hEventNotify = buffer_events[i];
		}
	 
		buffer_notify->SetNotificationPositions(numBuffers,not);
	 
		LPVOID p1=0,p2=0;
		DWORD s1=0,s2=0;
	 
		verifyc(buffer->Lock(0,desc.dwBufferBytes,&p1,&s1,&p2,&s2,0));
		assert(p2==0);
		memset(p1,0,s1);
		verifyc(buffer->Unlock(p1,s1,p2,s2));
	 
		//Play the buffer !
		verifyc(buffer->Play(0,0,DSBPLAY_LOOPING));

//.........这里部分代码省略.........

//.........这里部分代码省略.........

			if( (FAILED(GUIDFromString( guid, &cGuid ))) ||
				FAILED( DirectSoundCreate8(&cGuid,&dsound,NULL) ) )
					throw std::runtime_error( "try again?" );
		}
		catch( std::runtime_error& )
		{
			// if the GUID failed, just open up the default dsound driver:
			if( FAILED(DirectSoundCreate8(NULL,&dsound,NULL) ) )
				throw std::runtime_error( "DirectSound failed to initialize!" );
		}

		if( FAILED(dsound->SetCooperativeLevel(GetDesktopWindow(),DSSCL_PRIORITY)) )
			throw std::runtime_error( "DirectSound Error: Cooperative level could not be set." );

		// Determine the user's speaker configuration, and select an expansion option as needed.
		// FAIL : Directsound doesn't appear to support audio expansion >_<

		DWORD speakerConfig = 2;
		//dsound->GetSpeakerConfig( &speakerConfig );

		IDirectSoundBuffer* buffer_;
 		DSBUFFERDESC desc;

		// Set up WAV format structure.

		memset(&wfx, 0, sizeof(WAVEFORMATEX));
		wfx.wFormatTag		= WAVE_FORMAT_PCM;
		wfx.nSamplesPerSec	= SampleRate;
		wfx.nChannels		= (WORD)speakerConfig;
		wfx.wBitsPerSample	= 16;
		wfx.nBlockAlign		= 2*(WORD)speakerConfig;
		wfx.nAvgBytesPerSec	= SampleRate * wfx.nBlockAlign;
		wfx.cbSize			= 0;

		uint BufferSizeBytes = BufferSize * wfx.nBlockAlign;

		// Set up DSBUFFERDESC structure.

		memset(&desc, 0, sizeof(DSBUFFERDESC));
		desc.dwSize = sizeof(DSBUFFERDESC);
		desc.dwFlags =  DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_CTRLPOSITIONNOTIFY;
		desc.dwBufferBytes = BufferSizeBytes * m_NumBuffers;
		desc.lpwfxFormat = &wfx;

		// Try a hardware buffer first, and then fall back on a software buffer if
		// that one fails.

		desc.dwFlags |= m_UseHardware ? DSBCAPS_LOCHARDWARE : DSBCAPS_LOCSOFTWARE;
		desc.dwFlags |= m_DisableGlobalFocus ? DSBCAPS_STICKYFOCUS : DSBCAPS_GLOBALFOCUS;

		if( FAILED(dsound->CreateSoundBuffer(&desc, &buffer_, 0) ) )
		{
			if( m_UseHardware )
			{
				desc.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS_LOCSOFTWARE;
				desc.dwFlags |= m_DisableGlobalFocus ? DSBCAPS_STICKYFOCUS : DSBCAPS_GLOBALFOCUS;

				if( FAILED(dsound->CreateSoundBuffer(&desc, &buffer_, 0) ) )
					throw std::runtime_error( "DirectSound Error: Buffer could not be created." );
			}

			throw std::runtime_error( "DirectSound Error: Buffer could not be created." );
		}
		if(	FAILED(buffer_->QueryInterface(IID_IDirectSoundBuffer8,(void**)&buffer)) || buffer == NULL )
			throw std::runtime_error( "DirectSound Error: Interface could not be queried." );

		buffer_->Release();
		verifyc( buffer->QueryInterface(IID_IDirectSoundNotify8,(void**)&buffer_notify) );

		DSBPOSITIONNOTIFY not[MAX_BUFFER_COUNT];

		for(uint i=0;i<m_NumBuffers;i++)
		{
			buffer_events[i] = CreateEvent(NULL,FALSE,FALSE,NULL);
			not[i].dwOffset = (wfx.nBlockAlign + BufferSizeBytes*(i+1)) % desc.dwBufferBytes;
			not[i].hEventNotify = buffer_events[i];
		}

		buffer_notify->SetNotificationPositions(m_NumBuffers,not);

		LPVOID p1=0,p2=0;
		DWORD s1=0,s2=0;

		verifyc(buffer->Lock(0,desc.dwBufferBytes,&p1,&s1,&p2,&s2,0));
		assert(p2==0);
		memset(p1,0,s1);
		verifyc(buffer->Unlock(p1,s1,p2,s2));

		//Play the buffer !
		verifyc(buffer->Play(0,0,DSBPLAY_LOOPING));

		// Start Thread
		myLastWrite = 0;
		dsound_running = true;
		thread = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)RThread<StereoOut16>,this,0,&tid);
		SetThreadPriority(thread,THREAD_PRIORITY_ABOVE_NORMAL);

		return 0;
	}

void SoundLibrary3dDirectSound::EnableDspFX(int _channel, int _numFilters, int const *_filterTypes)
{
    AppReleaseAssert( _numFilters > 0, "Bad argument passed to EnableFilters" );

	AppDebugAssert(_channel >= 0 && _channel < m_numChannels);
	DirectSoundChannel *channel;
	if (_channel == m_musicChannelId) channel = m_musicChannel;
	else				channel = &m_channels[_channel];

    int errCode;
    IDirectSoundBuffer8 *buffer = (IDirectSoundBuffer8 *) channel->m_bufferInterface;


	if (GetNumFilters(_channel) > 0)
	{
		DisableDspFX(_channel);
	}


    //
    // Prepare the sound descriptions

    DSEFFECTDESC desc[DSP_DSOUND_WAVESREVERB];
    int numDSoundFilters = 0;
	for( int i = 0; i < _numFilters; ++i )
    {
		if (_filterTypes[i] <= DSP_DSOUND_WAVESREVERB)
		{
			ZeroMemory( &desc[numDSoundFilters], sizeof(DSEFFECTDESC) );
			desc[numDSoundFilters].dwSize = sizeof( DSEFFECTDESC );
			desc[numDSoundFilters].dwFlags = DSFX_LOCSOFTWARE;    
			desc[numDSoundFilters].guidDSFXClass = *s_dxDescriptors[ _filterTypes[i] ].m_sfxClass;

			AppDebugAssert(
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_CHORUS ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_COMPRESSOR ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_DISTORTION ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_ECHO ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_FLANGER ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_GARGLE ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_I3DL2REVERB ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_STANDARD_PARAMEQ ||
				desc[numDSoundFilters].guidDSFXClass == GUID_DSFX_WAVES_REVERB
				);
			++numDSoundFilters;
		}
    }
    
	unsigned long results[NUM_FILTERS];
	if (numDSoundFilters > 0)
	{
		//
		// Stop the channel

		errCode = buffer->Stop();
		SOUNDASSERT( errCode, "Direct sound couldn't stop a secondary buffer from playing" );


		//
		// Set up the filters

		errCode = buffer->SetFX( numDSoundFilters, desc, results );
		SOUNDASSERT( errCode, "Direct sound couldn't set fx" );


		//
		// Restart the channel

		errCode = buffer->Play( 0, 0,  DSBPLAY_LOOPING );
		SOUNDASSERT( errCode, "Direct sound couldn't play a secondary buffer" );
	}


    for( int i = 0; i < _numFilters; ++i )
    {
		AppDebugAssert(_filterTypes[i] >= 0);
		
		if (_filterTypes[i] <= DSP_DSOUND_WAVESREVERB)
		{
	        AppReleaseAssert( results[i] == DSFXR_LOCSOFTWARE, "DirectSound couldn't enable filter" );
			channel->m_dspFX[i].m_dxFilter = true;
		}

		switch (_filterTypes[i])
		{
			case DSP_RESONANTLOWPASS:
				channel->m_dspFX[_filterTypes[i]].m_userFilter = new DspResLowPass(m_sampleRate);
				break;
			case DSP_BITCRUSHER:
				channel->m_dspFX[_filterTypes[i]].m_userFilter = new DspBitCrusher(m_sampleRate);
				break;
			case DSP_GARGLE:
				channel->m_dspFX[_filterTypes[i]].m_userFilter = new DspGargle(m_sampleRate);
				break;
			case DSP_ECHO:
				channel->m_dspFX[_filterTypes[i]].m_userFilter = new DspEcho(m_sampleRate);
				break;
			case DSP_SIMPLE_REVERB:
				channel->m_dspFX[_filterTypes[i]].m_userFilter = new DspReverb(m_sampleRate);
				break;
//.........这里部分代码省略.........