return NULL;
yuv2rgb_fun yuv2rgb_init_mlib(unsigned bpp, int mode) {  	if( bpp == 24 ) 	{		if( mode == MODE_RGB )			return mlib_YUV2RGB420_24;  }	if( bpp == 32 ) 	{		if( mode == MODE_RGB )			return mlib_YUV2ARGB420_32;		else if( mode == MODE_BGR )			return mlib_YUV2ABGR420_32;	}  	return NULL;}