I420转RGB

http://blog.csdn.net/huiguixian/article/details/17288909

public class YuvToRGB {
    private static int R = 0;
    private static int G = 1;
    private static int B = 2;
    public static int[] I420ToRGB(byte[] src, int width, int height){
        int numOfPixel = width * height;
        int positionOfV = numOfPixel;
        int positionOfU = numOfPixel/4 + numOfPixel;
        int[] rgb = new int[numOfPixel*3];

        for(int i=0; i<height; i++){
            int startY = i*width;
            int step = (i/2)*(width/2);
            int startV = positionOfV + step;
            int startU = positionOfU + step;
            for(int j = 0; j < width; j++){
                int Y = startY + j;
                int V = startV + j/2;
                int U = startU + j/2;
                int index = Y*3;
                rgb[index+B] = (int)((src[Y]&0xff) + 1.4075 * ((src[V]&0xff)-128));
                rgb[index+G] = (int)((src[Y]&0xff) - 0.3455 * ((src[U]&0xff)-128) - 0.7169*((src[V]&0xff)-128));
                rgb[index+R] = (int)((src[Y]&0xff) + 1.779 * ((src[U]&0xff)-128));
            }
        }

        return rgb;
    }
}