public void Rgb2YCbCrOptimizedTest()
{
sbyte[] data = PixelMapTests.GetRandomData(width, height, bytesPerPixel);
long time = 0;
Stopwatch watch = new Stopwatch();
for (int i = 0; i < testCount + testsToSkip; i++)
{
watch.Restart();
sbyte[] outY = new sbyte[width * height];
sbyte[] outCb = new sbyte[width * height];
sbyte[] outCr = new sbyte[width * height];
unsafe
{
fixed(sbyte *pData = data)
fixed(sbyte *pOutY = outY)
fixed(sbyte *pOutCb = outCb)
fixed(sbyte *pOutCr = outCr)
{
Pixel *pPix = (Pixel *)pData;
InterWaveTransform.Rgb2YCbCr(pPix, width, height, width * bytesPerPixel, pOutY, pOutCb, pOutCr, width);
}
}
watch.Stop();
if (i >= testsToSkip)
{
time += watch.ElapsedMilliseconds;
}
}
Console.WriteLine($"Optimized Rgb2YCbCr conversion time ms {((double)time / testCount).ToString("0#.000")}");
}
public static IPixelMap PixelMapFromBitmap(System.Drawing.Bitmap bmp)
{
IPixelMap pixMap = PixelMapTests.CreateInitVerifyPixelMap(bmp.Width, bmp.Height, Pixel.WhitePixel);
BitmapData data = null;
try
{
data = bmp.LockBits(new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
unsafe
{
// TODO: Fix me!
fixed(sbyte *dest = pixMap.Data)
MemoryUtilities.MoveMemory(dest, (void *)data.Scan0, pixMap.Data.Length);
}
}
catch (Exception ex)
{
throw new DjvuAggregateException(
$"Error with bitmap. Width: {bmp.Width}, Height: {bmp.Height}, PixelFormat: {bmp.PixelFormat}", ex);
}
finally
{
if (data != null)
{
bmp.UnlockBits(data);
}
}
return(pixMap);
}
public void Rgb2YCbCrFragmentedTest()
{
sbyte[] data = PixelMapTests.GetRandomData(width, height, bytesPerPixel);
long time = 0;
Stopwatch watch = new Stopwatch();
sbyte[] outY = new sbyte[width * height];
sbyte[] outCb = new sbyte[width * height];
sbyte[] outCr = new sbyte[width * height];
for (int i = 0; i < testCount; i++)
{
watch.Restart();
unsafe
{
GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
GCHandle hOutY = GCHandle.Alloc(outY, GCHandleType.Pinned);
GCHandle hOutCb = GCHandle.Alloc(outCb, GCHandleType.Pinned);
GCHandle hOutCr = GCHandle.Alloc(outCr, GCHandleType.Pinned);
sbyte * pY = (sbyte *)hOutY.AddrOfPinnedObject();
sbyte * pCb = (sbyte *)hOutCb.AddrOfPinnedObject();
sbyte * pCr = (sbyte *)hOutCr.AddrOfPinnedObject();
Pixel * pPix = (Pixel *)hData.AddrOfPinnedObject();
InterWaveTransform.Rgb2Y(pPix, width, height, width * bytesPerPixel, pY, width);
InterWaveTransform.Rgb2Cb(pPix, width, height, width * bytesPerPixel, pCb, width);
InterWaveTransform.Rgb2Cr(pPix, width, height, width * bytesPerPixel, pCr, width);
hData.Free();
hOutY.Free();
hOutCb.Free();
hOutCr.Free();
}
watch.Stop();
if (i >= testsToSkip)
{
time += watch.ElapsedMilliseconds;
}
}
Console.WriteLine($"Fragmented Rgb2YCbCr conversion time ms {((double)time / testCount).ToString("0#.000")}");
}
