C++ DataSourceRef::isFilePath方法代码示例

// TODO: non-local file support?
bool FilePlayer::setFile(const DataSourceRef fileSource)
{
	if(fileSource->isFilePath()) {
		return setFile(fileSource->getFilePath());
	} else {
		return false;
	}
}

///////////////////////////////////////////////////////////////////////////////
// ImageSourceFileQuartz
ImageSourceFileQuartzRef ImageSourceFileQuartz::createFileQuartzRef( DataSourceRef dataSourceRef, ImageSource::Options options )
{
	std::shared_ptr<CGImageSource> sourceRef;
	std::shared_ptr<CGImage> imageRef;
	
	::CFStringRef keys[1] = { kCGImageSourceShouldAllowFloat };
	::CFBooleanRef values[1] = { kCFBooleanTrue };
	const std::shared_ptr<__CFDictionary> optionsDict( (__CFDictionary*)CFDictionaryCreate( kCFAllocatorDefault, (const void **)&keys, (const void **)&values, 1, NULL, NULL ), cocoa::safeCfRelease );

	if( dataSourceRef->isFilePath() ) {
		::CFStringRef pathString = cocoa::createCfString( dataSourceRef->getFilePath().string() );
		::CFURLRef urlRef = ::CFURLCreateWithFileSystemPath( kCFAllocatorDefault, pathString, kCFURLPOSIXPathStyle, false );
		sourceRef = std::shared_ptr<CGImageSource>( ::CGImageSourceCreateWithURL( urlRef, optionsDict.get() ), cocoa::safeCfRelease );
		::CFRelease( pathString );
		::CFRelease( urlRef );
	}
	else if( dataSourceRef->isUrl() ) {
		::CFURLRef urlRef = cocoa::createCfUrl( dataSourceRef->getUrl() );
		if( ! urlRef )
			throw ImageIoExceptionFailedLoad();
		sourceRef = std::shared_ptr<CGImageSource>( ::CGImageSourceCreateWithURL( urlRef, optionsDict.get() ), cocoa::safeCfRelease );
		::CFRelease( urlRef );		
	}
	else { // last ditch, we'll use a dataref from the buffer
		::CFDataRef dataRef = cocoa::createCfDataRef( dataSourceRef->getBuffer() );
		if( ! dataRef )
			throw ImageIoExceptionFailedLoad();
		
		sourceRef = std::shared_ptr<CGImageSource>( ::CGImageSourceCreateWithData( dataRef, optionsDict.get() ), cocoa::safeCfRelease );
		::CFRelease( dataRef );
	}
	
	if( sourceRef ) {
		imageRef = std::shared_ptr<CGImage>( ::CGImageSourceCreateImageAtIndex( sourceRef.get(), options.getIndex(), optionsDict.get() ), CGImageRelease );
		if( ! imageRef )
			throw ImageIoExceptionFailedLoad();
	}
	else
		throw ImageIoExceptionFailedLoad();

	const std::shared_ptr<__CFDictionary> imageProperties( (__CFDictionary*)::CGImageSourceCopyProperties( sourceRef.get(), NULL ), ::CFRelease );
	const std::shared_ptr<__CFDictionary> imageIndexProperties( (__CFDictionary*)::CGImageSourceCopyPropertiesAtIndex( sourceRef.get(), options.getIndex(), NULL ), ::CFRelease );

	return ImageSourceFileQuartzRef( new ImageSourceFileQuartz( imageRef.get(), options, imageProperties, imageIndexProperties ) );
}

///////////////////////////////////////////////////////////////////////////////
// ImageSourceFileQuartz
ImageSourceFileQuartzRef ImageSourceFileQuartz::createFileQuartzRef( DataSourceRef dataSourceRef )
{
	::CGImageSourceRef sourceRef = NULL;
	::CGImageRef imageRef = NULL;
	
	::CFStringRef keys[1] = { kCGImageSourceShouldAllowFloat };
	::CFBooleanRef values[1] = { kCFBooleanTrue };
	::CFDictionaryRef optionsDict = ::CFDictionaryCreate( kCFAllocatorDefault, (const void **)&keys, (const void **)&values, 1, NULL, NULL );

	if( dataSourceRef->isFilePath() ) {
		::CFStringRef pathString = cocoa::createCfString( dataSourceRef->getFilePath() );
		::CFURLRef urlRef = ::CFURLCreateWithFileSystemPath( kCFAllocatorDefault, pathString, kCFURLPOSIXPathStyle, false );
		sourceRef = ::CGImageSourceCreateWithURL( urlRef, optionsDict );
		::CFRelease( pathString );
		::CFRelease( urlRef );
	}
	else if( dataSourceRef->isUrl() ) {
		::CFURLRef urlRef = cocoa::createCfUrl( dataSourceRef->getUrl() );
		if( ! urlRef )
			throw ImageIoExceptionFailedLoad();
		sourceRef = ::CGImageSourceCreateWithURL( urlRef, optionsDict );
		::CFRelease( urlRef );		
	}
	else { // last ditch, we'll use a dataref from the buffer
		::CFDataRef dataRef = cocoa::createCfDataRef( dataSourceRef->getBuffer() );
		if( ! dataRef )
			throw ImageIoExceptionFailedLoad();
		
		sourceRef = ::CGImageSourceCreateWithData( dataRef, optionsDict );
		::CFRelease( dataRef );
	}
	
	if( sourceRef ) {
		imageRef = ::CGImageSourceCreateImageAtIndex( sourceRef, 0, optionsDict );
		::CFRelease( sourceRef );
		if( ! imageRef )
			throw ImageIoExceptionFailedLoad();
	}
	else
		throw ImageIoExceptionFailedLoad();

	return ImageSourceFileQuartzRef( new ImageSourceFileQuartz( imageRef ) );
}

void MovieBase::initFromDataSource( DataSourceRef dataSourceRef, const std::string &mimeTypeHint )
{
	startQuickTime();
	if( dataSourceRef->isFilePath() ) { // try to use quicktime's native file handling if possible
		getObj()->mMovie = openMovieFromPath( dataSourceRef->getFilePath() );
		// no need to retain the data source
	}
	else if( dataSourceRef->isUrl() ) { // try to use quicktime's native Url handling if possible
		// Create a loader for this Url and then wait on it
		MovieLoader loader( dataSourceRef->getUrl() );
		loader.waitForLoaded();
		getObj()->mMovie = loader.transferMovieHandle();
		// no need to retain the data source
	}
	else { // we'll need to load from memory; and we'll rer to the data source to make sure it doesn't go away before the movie does
		Buffer buffer( dataSourceRef->getBuffer() );
		getObj()->mMovie = openMovieFromMemory( buffer.getData(), buffer.getDataSize(), dataSourceRef->getFilePathHint(), mimeTypeHint );	
		getObj()->mDataSource = dataSourceRef; // retain a reference to the dataSource so that it doesn't go away before we do
	}
	init();
}

ImageSourceFileTinyExr::ImageSourceFileTinyExr( DataSourceRef dataSource, ImageSource::Options /*options*/ )
{
	mExrImage.reset( new EXRImage );
	const char *error;

	InitEXRImage( mExrImage.get() );

	int status = 0;
	if( dataSource->isFilePath() ) {
		status = ParseMultiChannelEXRHeaderFromFile( mExrImage.get(), dataSource->getFilePath().string().c_str(), &error );
		if( status != 0 )
			throw ImageIoExceptionFailedLoadTinyExr( string( "Failed to parse OpenEXR header; Error message: " ) + error );
		status = LoadMultiChannelEXRFromFile( mExrImage.get(), dataSource->getFilePath().string().c_str(), &error );
		if( status != 0 )
			throw ImageIoExceptionFailedLoadTinyExr( string( "Failed to parse OpenEXR file; Error message: " ) + error );
	}
	else {
		BufferRef buffer = dataSource->getBuffer();
		
		status = ParseMultiChannelEXRHeaderFromMemory( mExrImage.get(), (const unsigned char*)buffer->getData(), &error );
		if( status != 0 )
			throw ImageIoExceptionFailedLoadTinyExr( string( "Failed to parse OpenEXR header; Error message: " ) + error );
		status = LoadMultiChannelEXRFromMemory( mExrImage.get(), (const unsigned char*)buffer->getData(), &error );
		if( status != 0 )
			throw ImageIoExceptionFailedLoadTinyExr( string( "Failed to parse OpenEXR file; Error message: " ) + error );
	}

	// verify that the channels are all the same size; currently we don't support variably sized channels
	int pixelType = mExrImage->pixel_types[0];
	for( int c = 1; c < mExrImage->num_channels; ++c ) {
		if( pixelType != mExrImage->pixel_types[c] )
			throw ImageIoExceptionFailedLoadTinyExr( "TinyExr: heterogneous channel data types not supported" );
	}

	switch( pixelType ) {
		case TINYEXR_PIXELTYPE_HALF:
			setDataType( ImageIo::FLOAT16 );
		break;
		case TINYEXR_PIXELTYPE_FLOAT:
			setDataType( ImageIo::FLOAT32 );
		break;
		default:
			throw ImageIoExceptionFailedLoadTinyExr( "TinyExr: Unknown data type" );
		break;
	}

	setSize( mExrImage->width, mExrImage->height );

	switch( mExrImage->num_channels ) {
		case 3:
			setColorModel( ImageIo::CM_RGB );
			setChannelOrder( ImageIo::ChannelOrder::RGB );
		break;
		case 4:
			setColorModel( ImageIo::CM_RGB );
			setChannelOrder( ImageIo::ChannelOrder::RGBA );
		break;
		default:
			throw ImageIoExceptionFailedLoadTinyExr( "TinyExr: Unsupported number of channels (" + to_string( mExrImage->num_channels ) + ")" );
	}
}

ImageSourceFileWic::ImageSourceFileWic( DataSourceRef dataSourceRef, ImageSource::Options options )
	: ImageSource()
{
	::HRESULT hr = S_OK;

	// Initialize COM
	msw::initializeCom();
	
    // Create WIC factory
    IWICImagingFactory *IWICFactoryP = NULL;
    hr = ::CoCreateInstance( CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&IWICFactoryP) );
	if( ! SUCCEEDED( hr ) )
		throw ImageIoExceptionFailedLoad();
	std::shared_ptr<IWICImagingFactory> IWICFactory = msw::makeComShared( IWICFactoryP );
	
    // Create a decoder
	IWICBitmapDecoder *decoderP = NULL;
	if( dataSourceRef->isFilePath() ) {
		hr = IWICFactory->CreateDecoderFromFilename(
				toUtf16( dataSourceRef->getFilePath().string() ).c_str(),                      // Image to be decoded
				NULL,                            // Do not prefer a particular vendor
				GENERIC_READ,                    // Desired read access to the file
				WICDecodeMetadataCacheOnDemand,  // Cache metadata when needed
				&decoderP                        // Pointer to the decoder
			);
		if( ! SUCCEEDED(hr) )
			throw ImageIoExceptionFailedLoad();
	}
	else { // have to use a buffer
		IWICStream *pIWICStream = NULL;
		hr = IWICFactory->CreateStream( &pIWICStream );
		if( ! SUCCEEDED(hr) )
			throw ImageIoExceptionFailedLoad();
		std::shared_ptr<IWICStream> stream = msw::makeComShared( pIWICStream );
		
		Buffer buffer = dataSourceRef->getBuffer();
		hr = stream->InitializeFromMemory( reinterpret_cast<BYTE*>( buffer.getData() ), buffer.getDataSize() );
		if( ! SUCCEEDED(hr) )
			throw ImageIoExceptionFailedLoad();
		
		hr = IWICFactory->CreateDecoderFromStream( stream.get(), NULL, WICDecodeMetadataCacheOnDemand, &decoderP );
		if( ! SUCCEEDED(hr) )
			throw ImageIoExceptionFailedLoad();
	}
	std::shared_ptr<IWICBitmapDecoder> decoder = msw::makeComShared( decoderP );

    // Retrieve the 'index' frame of the image from the decoder
	IWICBitmapFrameDecode *frameP = NULL;
	hr = decoder->GetFrame( options.getIndex(), &frameP );
	if( ! SUCCEEDED(hr) )
		throw ImageIoExceptionFailedLoad();
	std::shared_ptr<IWICBitmapFrameDecode> frame = msw::makeComShared( frameP );

	UINT width = 0, height = 0;
	frame->GetSize( &width, &height );
	mWidth = width; mHeight = height;
	
	GUID pixelFormat = { 0 }, convertPixelFormat;
	frame->GetPixelFormat( &pixelFormat );
	
	bool requiresConversion = processFormat( pixelFormat, &convertPixelFormat );
	mRowBytes = mWidth * ImageIo::dataTypeBytes( mDataType ) * channelOrderNumChannels( mChannelOrder );

	mData = std::shared_ptr<uint8_t>( new uint8_t[mRowBytes * mHeight], boost::checked_array_delete<uint8_t> );

	if( requiresConversion ) {
		IWICFormatConverter *pIFormatConverter = NULL;	
		hr = IWICFactory->CreateFormatConverter( &pIFormatConverter );
		if( ! SUCCEEDED( hr ) )
			throw ImageIoExceptionFailedLoad();
		std::shared_ptr<IWICFormatConverter> formatConverter = msw::makeComShared( pIFormatConverter );
		hr = formatConverter->Initialize( frame.get(), convertPixelFormat, WICBitmapDitherTypeNone,
					NULL, 0.f, WICBitmapPaletteTypeCustom );
		if( ! SUCCEEDED( hr ) )
			throw ImageIoExceptionFailedLoad();
		hr = formatConverter->CopyPixels( NULL, (UINT)mRowBytes, mRowBytes * mHeight, mData.get() );
	}
	else
		hr = frame->CopyPixels( NULL, (UINT)mRowBytes, mRowBytes * mHeight, mData.get() );
}

SourceFile::SourceFile( DataSourceRef dataSourceRef )
	: Source()
{
	OSStatus err = noErr;
	AudioFileID aFileRef;
	if( dataSourceRef->isFilePath() ) {
		::CFStringRef pathString = cocoa::createCfString( dataSourceRef->getFilePath() );
		::CFURLRef urlRef = ::CFURLCreateWithFileSystemPath( kCFAllocatorDefault, pathString, kCFURLPOSIXPathStyle, false );
		err = AudioFileOpenURL( urlRef, kAudioFileReadPermission/*fsRdPerm*/, 0, &aFileRef );
		::CFRelease( pathString );
		::CFRelease( urlRef );
		if( err ) {
#if defined(CINDER_MAC)
			//TODO: find iphone equivalent of fnfErr
			if( err == fnfErr ) {
				throw IoExceptionSourceNotFound();
			}
#endif
			throw IoExceptionFailedLoad();
		}
	} else if( dataSourceRef->isUrl() ) {
		::CFURLRef urlRef = cocoa::createCfUrl( dataSourceRef->getUrl() );
		err = AudioFileOpenURL( urlRef, kAudioFileReadPermission/*fsRdPerm*/, 0, &aFileRef );
		::CFRelease( urlRef );
		if( err ) {
			throw IoExceptionFailedLoad();
		}
	}
	mFileRef = shared_ptr<OpaqueAudioFileID>( aFileRef, AudioFileClose );
	
	
	//load header info
	AudioStreamBasicDescription nativeFormatDescription;
	UInt32 size = sizeof( AudioStreamBasicDescription );
	err = AudioFileGetProperty( aFileRef, kAudioFilePropertyDataFormat, &size, &nativeFormatDescription );
	if( err ) {
		throw IoExceptionFailedLoad();
	}
	
	loadFromCaAudioStreamBasicDescription( this, &nativeFormatDescription );
	
	size = sizeof( uint64_t );
	err = AudioFileGetProperty( aFileRef, kAudioFilePropertyAudioDataPacketCount, &size, &mPacketCount );
	if( err ) {
		throw IoExceptionFailedLoad();
	}
	
	size = sizeof( uint64_t );
	err = AudioFileGetProperty( aFileRef, kAudioFilePropertyAudioDataByteCount, &size, &mByteCount );
	if( err ) {
		throw IoExceptionFailedLoad();
	}
	
	size = sizeof( uint32_t );
	err = AudioFileGetProperty( aFileRef, kAudioFilePropertyMaximumPacketSize, &size, &mMaxPacketSize );
	if( err ) {
		throw IoExceptionFailedLoad();
	}
	
	size = sizeof( double );
	err = AudioFileGetProperty( aFileRef, kAudioFilePropertyEstimatedDuration, &size, &mDuration );
	if( err ) {
		throw IoExceptionFailedLoad();
	}
}