[Android] RGB to YUV

gistfile1.java

// from http://d.hatena.ne.jp/Superdry/20110130/1296405341
private int[] convertRGB2YUV(int color) {
	ColorMatrix cm = new ColorMatrix();
	cm.setRGB2YUV();
	final float[] yuvArray = cm.getArray();
	
	int r = Color.red(color);
	int g = Color.green(color);
	int b = Color.blue(color);
	int[] result = new int[3];

	// Adding a 127 U and V.
	result[0] = floatToByte(yuvArray[0] * r + yuvArray[1] * g + yuvArray[2] * b);
	result[1] = floatToByte(yuvArray[5] * r + yuvArray[6] * g + yuvArray[7] * b) + 127;
	result[2] = floatToByte(yuvArray[10] * r + yuvArray[11] * g + yuvArray[12] * b) + 127;
	return result;
}

private int floatToByte(float x) {
	int n = java.lang.Math.round(x);
	return n;
}