/// <summary>
/// Decode a shared encoded image to a shared image.
/// </summary>
/// <param name="sharedEncodedImage">The shared encoded image to decode.</param>
/// <returns>The decoded shared image.</returns>
internal static Shared <Image> Decode(this Shared <EncodedImage> sharedEncodedImage)
{
Shared <Image> sharedImage = null;
if (sharedEncodedImage.Resource != null)
{
// The code below maintains back-compatibility with encoded images which did not store the pixel format
// on the instance, but only in the stream. If the pixel format is unknown, we call upon the decoder to
// retrieve the pixel format. This might be less performant, but enables decoding in the right format
// even from older versions of encoded images.
var decoder = new ImageFromStreamDecoder();
var pixelFormat = sharedEncodedImage.Resource.PixelFormat == PixelFormat.Undefined ?
decoder.GetPixelFormat(sharedEncodedImage.Resource.ToStream()) : sharedEncodedImage.Resource.PixelFormat;
// If the decoder does not return a valid pixel format, we throw an exception.
if (pixelFormat == PixelFormat.Undefined)
{
throw new ArgumentException("The encoded image does not contain a supported pixel format.");
}
sharedImage = ImagePool.GetOrCreate(sharedEncodedImage.Resource.Width, sharedEncodedImage.Resource.Height, pixelFormat);
decoder.DecodeFromStream(sharedEncodedImage.Resource.ToStream(), sharedImage.Resource);
}
return(sharedImage);
}
/// <summary>
/// Convert encoded image to image.
/// </summary>
public Shared <Image> EncodedImageToImage(Shared <EncodedImage> encodedImage, Envelope envelope)
{
var decoder = new ImageFromStreamDecoder();//this is a platform specific decoder
var image = encodedImage.Resource.Decode(decoder);
var sharedImage = ImagePool.GetOrCreate(encodedImage.Resource.Width, encodedImage.Resource.Height, image.PixelFormat);
sharedImage.Resource.CopyFrom(image.ImageData);
return(sharedImage);
}
/// <summary>
/// Exports data based on the specified export command.
/// </summary>
/// <param name="exportCommand">The export command.</param>
/// <returns>An error code or 0 if success.</returns>
public static int Run(Verbs.ExportCommand exportCommand)
{
const string videoStreamName = "VideoImageCameraView";
const string videoEncodedStreamName = "VideoEncodedImageCameraView";
const string audioStreamName = "Audio";
var pngEncoder = new ImageToPngStreamEncoder();
var decoder = new ImageFromStreamDecoder();
// Create a pipeline
using var p = Pipeline.Create(deliveryPolicy: DeliveryPolicy.Unlimited);
// Open the psi store for reading
var store = PsiStore.Open(p, exportCommand.StoreName, exportCommand.StorePath);
// Get references to the various streams. If a stream is not present in the store,
// the reference will be null.
var accelerometer = store.OpenStreamOrDefault <(Vector3D, DateTime)[]>("Accelerometer");
