private async void button_Click(object sender, RoutedEventArgs e)
{
var picker = new Windows.Storage.Pickers.FileOpenPicker();
picker.FileTypeFilter.Add(".jpg");
var file = await picker.PickSingleFileAsync();
Lumia.Imaging.BitmapRenderer renderer = new Lumia.Imaging.BitmapRenderer();
renderer.ColorMode = Lumia.Imaging.ColorMode.Yuv420P;
renderer.Source = new Lumia.Imaging.StorageFileImageSource(file);
var bmp = await renderer.RenderAsync();
var surfaceImageSource = new SurfaceImageSource((int)bmp.Dimensions.Width, (int)bmp.Dimensions.Height);
var yuvRenderer = YuvRenderer.YuvD3DRenderer.CreateForSwapChainPanel(root, (uint)bmp.Dimensions.Width, (uint)bmp.Dimensions.Height, YuvRenderer.StretchMode.UniformToFill);
Task.Run(() =>
{
//// convert to nv12.
//var yReader = DataReader.FromBuffer(bmp.Buffers[0].Buffer);
//var uReader = DataReader.FromBuffer(bmp.Buffers[1].Buffer);
//var vReader = DataReader.FromBuffer(bmp.Buffers[2].Buffer);
//byte[] yData = new byte[bmp.Buffers[0].Buffer.Length];
//byte[] uData = new byte[bmp.Buffers[1].Buffer.Length];
//byte[] vData = new byte[bmp.Buffers[2].Buffer.Length];
//yReader.ReadBytes(yData);
//uReader.ReadBytes(uData);
//vReader.ReadBytes(vData);
//var height = (int)(bmp.Dimensions.Height);
//var halfWidth = ((int)(bmp.Dimensions.Width)) / 2;
//var halfHeight = height / 2;
//var heightAndHalf = height + halfHeight;
//var nv12Data = new byte[bmp.Buffers[0].Pitch * heightAndHalf];
//Array.Copy(yData, nv12Data, yData.Length);
//Parallel.For(0, halfHeight, y =>
//{
// var firstPixelOfRow = yData.Length + y * bmp.Buffers[0].Pitch;
// for (int x = 0; x < halfWidth; ++x)
// {
// nv12Data[x * 2 + firstPixelOfRow] = uData[y * bmp.Buffers[1].Pitch + x];
// nv12Data[x * 2 + firstPixelOfRow + 1] = vData[y * bmp.Buffers[2].Pitch + x];
// }
//});
while (true)
{
yuvRenderer.RenderYuv420P(bmp.Buffers[0].Buffer, bmp.Buffers[1].Buffer, bmp.Buffers[2].Buffer, bmp.Buffers[0].Pitch, bmp.Buffers[1].Pitch);
}
});
}
internal async void ContinuePick(StorageFile file)
{
Lumia.Imaging.BitmapRenderer renderer = new Lumia.Imaging.BitmapRenderer();
renderer.ColorMode = Lumia.Imaging.ColorMode.Yuv420P;
renderer.Source = new Lumia.Imaging.StorageFileImageSource(file);
var bmp = await renderer.RenderAsync();
var surfaceImageSource = new SurfaceImageSource((int)bmp.Dimensions.Width, (int)bmp.Dimensions.Height);
var yuvRenderer = YuvRenderer.YuvD3DRenderer.CreateForSwapChainPanel(root, (uint)bmp.Dimensions.Width, (uint)bmp.Dimensions.Height, YuvRenderer.StretchMode.Uniform);
Task.Run(() =>
{
// convert to nv12.
var yReader = DataReader.FromBuffer(bmp.Buffers[0].Buffer);
var uReader = DataReader.FromBuffer(bmp.Buffers[1].Buffer);
var vReader = DataReader.FromBuffer(bmp.Buffers[2].Buffer);
byte[] yData = new byte[bmp.Buffers[0].Buffer.Length];
byte[] uData = new byte[bmp.Buffers[1].Buffer.Length];
byte[] vData = new byte[bmp.Buffers[2].Buffer.Length];
yReader.ReadBytes(yData);
uReader.ReadBytes(uData);
vReader.ReadBytes(vData);
var height = (int)(bmp.Dimensions.Height);
var halfWidth = ((int)(bmp.Dimensions.Width)) / 2;
var halfHeight = height / 2;
var heightAndHalf = height + halfHeight;
var nv12Data = new byte[bmp.Buffers[0].Pitch * heightAndHalf];
Array.Copy(yData, nv12Data, yData.Length);
for (int y = 0; y < halfHeight; ++y)
{
var firstPixelOfRow = yData.Length + y * bmp.Buffers[0].Pitch;
for (int x = 0; x < halfWidth; ++x)
{
nv12Data[x * 2 + firstPixelOfRow] = uData[y * bmp.Buffers[1].Pitch + x];
nv12Data[x * 2 + firstPixelOfRow + 1] = vData[y * bmp.Buffers[2].Pitch + x];
}
}
while (true)
{
yuvRenderer.RenderNV12(nv12Data, bmp.Buffers[0].Pitch);
}
});
}
