C++ IDirectSoundBuffer8::Lock方法代码示例

DWORD DSound51_Driver::WorkerThread()
{
	while( dsound_running )
	{
		u32 rv = WaitForMultipleObjects(numBuffers,buffer_events,FALSE,200);

		s16* p1, *oldp1;
		LPVOID p2;
		DWORD s1,s2;

		u32 poffset = DSound51::BufferSizeBytes * rv;

#ifdef _DEBUG
		verifyc(buffer->Lock(poffset,DSound51::BufferSizeBytes,(LPVOID*)&p1,&s1,&p2,&s2,0));
#else
		if( FAILED(buffer->Lock(poffset,DSound51::BufferSizeBytes,(LPVOID*)&p1,&s1,&p2,&s2,0) ) )
		{
			fputs( " * SPU2 : Directsound Warning > Buffer lock failure.  You may need to increase the DSound buffer count.\n", stderr );
			continue;
		}
#endif
		oldp1 = p1;

		for(int p=0; p<DSound51::PacketsPerBuffer; p++, p1+=SndOutPacketSize )
		{
			s32 temp[SndOutPacketSize];
			s32* s = temp;
			s16* t = p1;

			buff->ReadSamples( temp );
			for(int j=0;j<SndOutPacketSize/2;j++)
			{
				// DPL2 code here: inputs s[0] and s[1]. outputs t[0] to t[5]
				dpl2.Convert( t, s[0], s[1] );

				t+=6;
				s+=2;
			}
		}

#ifndef PUBLIC
		verifyc(buffer->Unlock(oldp1,s1,p2,s2));
#else
		buffer->Unlock(oldp1,s1,p2,s2);
#endif

		// Set the write pointer to the beginning of the next block.
		myLastWrite = (poffset + DSound51::BufferSizeBytes) % (DSound51::BufferSizeBytes*numBuffers);
	}
	return 0;
}

	DWORD CALLBACK Thread()
	{
		static const int BufferSizeBytes = BufferSize * sizeof( T );

		while( dsound_running )
		{
			u32 rv = WaitForMultipleObjects(numBuffers,buffer_events,FALSE,200);
	 
			T* p1, *oldp1;
			LPVOID p2;
			DWORD s1,s2;
	 
			u32 poffset = BufferSizeBytes * rv;

			if( FAILED(buffer->Lock(poffset,BufferSizeBytes,(LPVOID*)&p1,&s1,&p2,&s2,0) ) )
			{
				assert( 0 );
				fputs( " * SPU2 : Directsound Warning > Buffer lock failure.  You may need to increase\n\tyour configured DSound buffer count.\n", stderr );
				continue;
			}
			oldp1 = p1;

			for(int p=0; p<PacketsPerBuffer; p++, p1+=SndOutPacketSize )
				SndBuffer::ReadSamples( p1 );

			buffer->Unlock( oldp1, s1, p2, s2 );

			// Set the write pointer to the beginning of the next block.
			myLastWrite = (poffset + BufferSizeBytes) & ~BufferSizeBytes;
		}
		return 0;
	}

bool VDAudioOutputDirectSoundW32::WriteAudio(uint32 offset, const void *data, uint32 bytes) {
	VDASSERT(offset < mDSBufferSize);
	VDASSERT(mDSBufferSize - offset >= bytes);

	LPVOID p1, p2;
	DWORD tc1, tc2;
	HRESULT hr = mpDSBuffer->Lock(offset, bytes, &p1, &tc1, &p2, &tc2, 0);

	if (FAILED(hr))
		return false;

	memcpy(p1, data, tc1);
	data = (char *)data + tc1;
	memcpy(p2, data, tc2);
	data = (char *)data + tc2;

	mpDSBuffer->Unlock(p1, tc1, p2, tc2);
	return true;
}

//.........这里部分代码省略.........
	count = fread( &waveFileHeader,sizeof( waveFileHeader ),1,filePtr );
	assert( count == 1 );

	// Check that the chunk ID is the RIFF format.
	assert(	(waveFileHeader.chunkId[0] == 'R') && 
			(waveFileHeader.chunkId[1] == 'I') && 
			(waveFileHeader.chunkId[2] == 'F') && 
			(waveFileHeader.chunkId[3] == 'F') );

	// Check that the file format is the WAVE format.
	assert(	(waveFileHeader.format[0] == 'W') && 
			(waveFileHeader.format[1] == 'A') &&
			(waveFileHeader.format[2] == 'V') &&
			(waveFileHeader.format[3] == 'E') );

	// Check that the sub chunk ID is the fmt format.
	assert(	(waveFileHeader.subChunkId[0] == 'f') && 
			(waveFileHeader.subChunkId[1] == 'm') &&
			(waveFileHeader.subChunkId[2] == 't') && 
			(waveFileHeader.subChunkId[3] == ' ') );

	// Check that the audio format is WAVE_FORMAT_PCM.
	assert( waveFileHeader.audioFormat == WAVE_FORMAT_PCM );

	// Check that the wave file was recorded in stereo format.
	assert( waveFileHeader.numChannels == 2 );

	// Check that the wave file was recorded at a sample rate of 44.1 KHz.
	assert( waveFileHeader.sampleRate == 44100 );

	// Ensure that the wave file was recorded in 16 bit format.
	assert( waveFileHeader.bitsPerSample == 16 );

	// Check for the data chunk header.
	assert( (waveFileHeader.dataChunkId[0] == 'd') && 
			(waveFileHeader.dataChunkId[1] == 'a') &&
			(waveFileHeader.dataChunkId[2] == 't') &&
			(waveFileHeader.dataChunkId[3] == 'a') );

	// Set the wave format of secondary buffer that this wave file will be loaded onto.
	waveFormat.wFormatTag = WAVE_FORMAT_PCM;
	waveFormat.nSamplesPerSec = 44100;
	waveFormat.wBitsPerSample = 16;
	waveFormat.nChannels = 2;
	waveFormat.nBlockAlign = (waveFormat.wBitsPerSample / 8) * waveFormat.nChannels;
	waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
	waveFormat.cbSize = 0;

	// Set the buffer description of the secondary sound buffer that the wave file will be loaded onto.
	bufferDesc.dwSize = sizeof(DSBUFFERDESC);
	bufferDesc.dwFlags = DSBCAPS_CTRLVOLUME;
	bufferDesc.dwBufferBytes = waveFileHeader.dataSize;
	bufferDesc.dwReserved = 0;
	bufferDesc.lpwfxFormat = &waveFormat;
	bufferDesc.guid3DAlgorithm = GUID_NULL;

	// Create a temporary sound buffer with the specific buffer settings.
	result = pDirectSound->CreateSoundBuffer( &bufferDesc,&tempBuffer,NULL );
	assert( !FAILED( result ) );

	// Test the buffer format against the direct sound 8 interface and create the secondary buffer.
	result = tempBuffer->QueryInterface( IID_IDirectSoundBuffer8,(void**)&pSecondaryBuffer );
	assert( !FAILED( result ) );

	// Release the temporary buffer.
	tempBuffer->Release();
	tempBuffer = 0;

	// Move to the beginning of the wave data which starts at the end of the data chunk header.
	fseek( filePtr,sizeof(WaveHeaderType),SEEK_SET );

	// Create a temporary buffer to hold the wave file data.
	waveData = new unsigned char[ waveFileHeader.dataSize ];
	assert( waveData );

	// Read in the wave file data into the newly created buffer.
	count = fread( waveData,1,waveFileHeader.dataSize,filePtr );
	assert( count == waveFileHeader.dataSize);

	// Close the file once done reading.
	error = fclose( filePtr );
	assert( error == 0 );

	// Lock the secondary buffer to write wave data into it.
	result = pSecondaryBuffer->Lock( 0,waveFileHeader.dataSize,(void**)&bufferPtr,(DWORD*)&bufferSize,NULL,0,0 );
	assert( !FAILED( result ) );

	// Copy the wave data into the buffer.
	memcpy( bufferPtr,waveData,waveFileHeader.dataSize );

	// Unlock the secondary buffer after the data has been written to it.
	result = pSecondaryBuffer->Unlock( (void*)bufferPtr,bufferSize,NULL,0 );
	assert( !FAILED( result ) );
	
	// Release the wave data since it was copied into the secondary buffer.
	delete [] waveData;
	waveData = NULL;

	return Sound( pSecondaryBuffer );
}

	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;
	}