/// <summary>
/// Converts the given image in NV12 format into a bitmap image.
/// </summary>
/// <param name="yuvPixelArray">The image data in NV12 format.</param>
/// <param name="width">The width of the image in pixels.</param>
/// <param name="height">The height of the image in pixels.</param>
/// <returns>A BitmapImage instance containing the image.</returns>
public static BitmapImage Nv12PixelArrayToBitmapImage(byte[] yuvPixelArray, int width, int height)
{
BitmapImage bitmapImage = null;
byte[] rgbPixelArray = ImageProcessingUtils.Nv12PixelArrayToRgbPixelArray(yuvPixelArray, width, height);
if (rgbPixelArray != null)
{
bitmapImage = new BitmapImage();
InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
stream.AsStreamForWrite().Write(rgbPixelArray, 0, rgbPixelArray.Length);
stream.Seek(0);
try
{
bitmapImage.SetSource(stream);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
bitmapImage = null;
}
}
return(bitmapImage);
}
/// <summary>
/// Stores the given image in NV12 format into a file.
/// </summary>
/// <param name="yuvPixelArray">The image data in NV12 format.</param>
/// <param name="width">The width of the image in pixels.</param>
/// <param name="height">The height of the image in pixels.</param>
/// <param name="fileName">The desired filename.</param>
public async static Task NV12PixelArrayToWriteableBitmapFileAsync(byte[] yuvPixelArray, int width, int height, string fileName)
{
byte[] rgbPixelArray = ImageProcessingUtils.Nv12PixelArrayToRgbPixelArray(yuvPixelArray, width, height);
var file = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFileAsync(
fileName, CreationCollisionOption.GenerateUniqueName);
using (IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
Guid BitmapEncoderGuid = BitmapEncoder.JpegEncoderId;
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoderGuid, stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore,
(uint)width,
(uint)height,
96.0,
96.0,
rgbPixelArray);
await encoder.FlushAsync();
}
}
/// <summary>
/// Converts the given image in NV12 format into a writeable bitmap.
/// </summary>
/// <param name="yuvPixelArray">The image data in NV12 format.</param>
/// <param name="width">The width of the image in pixels.</param>
/// <param name="height">The height of the image in pixels.</param>
/// <returns>A WriteableBitmap instance containing the image.</returns>
public async static Task <WriteableBitmap> Nv12PixelArrayToWriteableBitmapAsync(byte[] yuvPixelArray, int width, int height)
{
WriteableBitmap writeableBitmap = null;
byte[] rgbPixelArray = ImageProcessingUtils.Nv12PixelArrayToRgbPixelArray(yuvPixelArray, width, height);
if (rgbPixelArray != null)
{
writeableBitmap = new WriteableBitmap(width, height);
using (Stream stream = writeableBitmap.PixelBuffer.AsStream())
{
if (stream.CanWrite)
{
await stream.WriteAsync(rgbPixelArray, 0, rgbPixelArray.Length);
stream.Flush();
}
}
}
return(writeableBitmap);
}
