static char *decode_fourcc(__u32 pixelformat, char *buf)
{
	buf[0] = pixelformat & 0xff;
	buf[1] = (pixelformat >> 8) & 0xff;
	buf[2] = (pixelformat >> 16) & 0xff;
	buf[3] = (pixelformat >> 24) & 0xff;
	buf[4] = '\0';
	return buf;
}
Unknown