/// <summary>
/// Create an IFrameSource from a source object. Currently supports Windows.Storage.StorageFile
/// and Windows.Media.Capture.MediaCapture source objects.
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static async Task <IFrameSource> CreateFrameSourceAsync(object source, EventHandler <string> failureHandler)
{
try
{
if (source is Windows.Storage.StorageFile)
{
var sourceFile = source as Windows.Storage.StorageFile;
if (sourceFile.ContentType.StartsWith("image"))
{
return(await ImageFileFrameSource.CreateFromStorageFileAsyncTask(sourceFile));
}
else if (sourceFile.ContentType.StartsWith("video"))
{
return(await MediaPlayerFrameSource.CreateFromStorageFileAsyncTask(sourceFile, failureHandler));
}
else
{
throw new ArgumentException("Invalid file type received: " + sourceFile.ContentType);
}
}
else if (source is Windows.Devices.Enumeration.DeviceInformation)
{
return(await FrameReaderFrameSource.CreateFromVideoDeviceInformationAsync(source as Windows.Devices.Enumeration.DeviceInformation, failureHandler));
}
else
{
throw new ArgumentException();
}
}
catch (Exception ex)
{
failureHandler(null, ex.Message);
}
return(null);
}
/// <summary>
/// Static factory
/// </summary>
/// <param name="storageFile"></param>
/// <returns></returns>
public static async Task <ImageFileFrameSource> CreateFromStorageFileAsyncTask(
StorageFile storageFile)
{
var result = new ImageFileFrameSource();
await result.GetFrameFromFileAsync(storageFile);
return(result);
}
/// <summary>
/// Static factory
/// </summary>
/// <param name="storageFile"></param>
/// <param name="imageDescriptor"></param>
/// <returns></returns>
public static async Task <ImageFileFrameSource> CreateFromStorageFileAsyncTask(
StorageFile storageFile,
ISkillFeatureImageDescriptor imageDescriptor)
{
var result = new ImageFileFrameSource()
{
m_desiredImageDescriptor = imageDescriptor
};
await result.GetFrameFromFileAsync(storageFile);
return(result);
}