public override Bitmap Frame(int frameNum)
{
var input = new byte[FrameLength];
File.Seek(frameNum * FrameLength, SeekOrigin.Begin);
File.Read(input, 0, FrameLength);
var output = new byte[Square * 3];
for (var i = 0; i < Height; i++)
{
var offsetY = i * Width;
var offsetU = Square + (i / 2) * (Width / 2);
var offsetV = Square * 5 / 4 + (i / 2) * (Width / 2);
var halfoffset = 3 * i * Width;
for (var j = 0; j < Width; j++)
{
var pixel = new YUVPixel(
input[offsetY + j],
input[offsetU + j / 2],
input[offsetV + j / 2]
);
var offset = halfoffset + 3 * j;
output[offset + 0] = pixel.B;
output[offset + 1] = pixel.G;
output[offset + 2] = pixel.R;
}
}
var bmp = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
var bmpData = bmp.LockBits(
new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.WriteOnly, bmp.PixelFormat);
Marshal.Copy(output, 0, bmpData.Scan0, output.Length);
bmp.UnlockBits(bmpData);
return(bmp);
}
public override Bitmap Frame(int frameNum)
{
var input = new byte[FrameLength];
File.Seek(frameNum * FrameLength, SeekOrigin.Begin);
File.Read(input, 0, FrameLength);
var output = new byte[Square * 3];
for (var i = 0; i < Height; i++)
{
var offsetY = i * Width;
var offsetU = Square + (i / 2) * (Width / 2);
var offsetV = Square * 5 / 4 + (i / 2) * (Width / 2);
var halfoffset = 3 * i * Width;
for (var j = 0; j < Width; j++)
{
var pixel = new YUVPixel(
input[offsetY + j],
input[offsetU + j / 2],
input[offsetV + j / 2]
);
var offset = halfoffset + 3 * j;
output[offset + 0] = pixel.B;
output[offset + 1] = pixel.G;
output[offset + 2] = pixel.R;
}
}
var bmp = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
var bmpData = bmp.LockBits(
new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.WriteOnly, bmp.PixelFormat);
Marshal.Copy(output, 0, bmpData.Scan0, output.Length);
bmp.UnlockBits(bmpData);
return bmp;
}
