Utils.java

package path.to.pkg;

public final class Utils
{
    static void YUV422toARGB8888(byte[] src, int[] dest, int w, int h)
    {
        final int fsize = w * h;
        for (int y=0, p=0; y<h; ++y)
        {
            int uvp = fsize + (y >> 1) * w, U = 0, V = 0;
            
            for (int x=0; x<w; ++x)
            {
                int Y = ((int)src[p] & 0xff) - 16;

                if (Y < 0)
                {
                    Y = 0;
                }

                final int UVp = fsize + (y >> 1) * w + (x & ~1);

                if ((x & 1) == 0)
                {
                    V = (0xff & src[uvp++]) - 128;
                    U = (0xff & src[uvp++]) - 128;
                }


                final int y1192 = 1192 * Y;
                int r = y1192 + 1634 * V;
                int g = y1192 - 833 * V - 400 * U;
                int b = y1192 + 2066 * U;

                if (r < 0)
                {
                    r = 0;
                }
                else if (r > 262143)
                {
                    r = 262143;
                }

                if (g < 0)
                {
                    g = 0;
                }
                else if (g > 262143)
                {
                    g = 262143;
                }

                if (b < 0)
                {
                    b = 0;
                }
                else if (b > 262143)
                {
                    b = 262143;
                }


                dest[p] = 0xff000000
                    | ((r << 6) & 0x00ff0000)
                    | ((g >> 2) & 0x0000ff00)
                    | ((b >> 10) & 0x000000ff);
                
                p++;
            }
        }
    }
}