-- IEEE Library
LIBRARY ieee;
USE ieee.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
ENTITY DCT_cos IS
--generic value for the number of bits ofr the input and the output
generic (n:integer :=16); --no of bits
PORT(

	Clk					: IN	STD_LOGIC;		-- Global Clk
	Reset				: IN	STD_LOGIC;		-- Global Reset
	--in from the controller 
	Cont_Reg_En 		:IN STD_LOGIC_VECTOR (7 downto 0);
	Cont_MUX2_Enable	:IN STD_LOGIC_VECTOR (2 downto 0);
	Cont_MUX_Enable 	:IN STD_LOGIC_VECTOR (2 downto 0);
	--in to the Reg 
	-- out of the mux
	Mux2_OUT			: OUT STD_LOGIC_VECTOR (n-1 downto 0)
	);
END DCT_cos;

architecture DCT_cos_arch of DCT_cos is
	-- signals i.e the output of the Reg
	signal 	cos1_sig	:STD_LOGIC_VECTOR (n-1 downto 0):= (others => '0');
	signal	cos2_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos3_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos4_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos5_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos6_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos7_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	signal  cos8_sig	:STD_LOGIC_VECTOR (n-1 downto 0):=(others => '0');
	
	

--Component declaration of DCT_Reg
COMPONENT DCT_Fofx
PORT(
	Clk			: IN	STD_LOGIC;		-- Global Clk
	Reset		: IN	STD_LOGIC;		-- Global Reset
	--in from the controller 
	Cont_Reg_En 	:IN STD_LOGIC_VECTOR (7 downto 0);
	Cont_MUX_Enable :IN STD_LOGIC_VECTOR (2 downto 0);
	--in to the Reg 
	fx1		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx2		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx3		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx4		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx5		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx6		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx7		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	fx8		:IN STD_LOGIC_VECTOR (n-1 downto 0);
	-- out of the mux
	Mux_OUT		: OUT STD_LOGIC_VECTOR (n-1 downto 0)

	);
END COMPONENT;

begin
--Portmap
DCT_Fofx_1:DCT_Fofx 
	PORT MAP (
	Clk => Clk,			
	Reset => Reset,	
	--in from the controller 
	Cont_Reg_En => Cont_Reg_En,
	Cont_MUX_Enable => Cont_MUX_Enable,
	--in to the Reg 
	fx1		=> cos1_sig,
	fx2		=> cos2_sig,
	fx3		=> cos3_sig,
	fx4		=> cos4_sig,
	fx5		=> cos5_sig,
	fx6		=> cos6_sig,
	fx7		=> cos7_sig,
	fx8		=> cos8_sig,
	-- out of the mux
	Mux_OUT	=> Mux2_OUT	
		);


process(Cont_MUX2_Enable)
begin
--MUX which gives the needed output according to the Cont_MUX_Enable
case Cont_MUX2_Enable is

	when "000" =>
	 cos1_sig <= "0000000000000001";
	 cos2_sig <= "0000000000000011";
	 cos3_sig <= "0000000000000111";
	 cos4_sig <= "1000000010001000";
	 cos5_sig <= "0000000000000000";
	 cos6_sig <= "0000001000001000";
	 cos7_sig <= "1000100000010000";
	 cos8_sig <= "0010000000000010";
	
	
	when "001" =>
	 cos1_sig <= "0001000000000001";
	 cos2_sig <= "0000001000000001";
	 cos3_sig <= "0000000001000001";
	 cos4_sig <= "1000010000000010";
	 cos5_sig <= "0000000001000100";
	 cos6_sig <= "0000000100010000";
	 cos7_sig <= "0000010000100000";
	 cos8_sig <= "0000000001000000";

		
	when "010" =>
	 cos1_sig <= "0101000000000000";
	 cos2_sig <= "0001100000000000";
	 cos3_sig <= "0000110000000000";
	 cos4_sig <= "0000100100000000";
	 cos5_sig <= "1000101000000000";
	 cos6_sig <= "0000100001000000";
	 cos7_sig <= "1000100000100000";
	 cos8_sig <= "0000000000000000";
	
				
	when "011" =>
	 cos1_sig <= "0100010000001000";
	 cos2_sig <= "1000000000010000";
	 cos3_sig <= "0100000100000000";
	 cos4_sig <= "0000100000100010";
	 cos5_sig <= "1000000100001000";
	 cos6_sig <= "1000000000000001";
	 cos7_sig <= "1000000000000011";
	 cos8_sig <= "0110000000000000";

				
	when "100" =>
	 cos1_sig <= "0001000010000000";
	 cos2_sig <= "0000100010000000";
	 cos3_sig <= "1000000100000000";
	 cos4_sig <= "0100000000000001";
	 cos5_sig <= "0010000000000010";
	 cos6_sig <= "1000010000000001";
	 cos7_sig <= "0000000100000001";
	 cos8_sig <= "0000000010001000";
				
	when "101" =>
	 cos1_sig <= "0000001000000000";
	 cos2_sig <= "0000100000000000";
	 cos3_sig <= "0000000010000000";
	 cos4_sig <= "0000100000000000";
	 cos5_sig <= "0000000001000000";
	 cos6_sig <= "0000010000000000";
	 cos7_sig <= "0000000100000000";
	 cos8_sig <= "0000000010000000";
				
	when "110" =>
	 cos1_sig <= "1000000001000000";
	 cos2_sig <= "0100000000000010";
	 cos3_sig <= "1000000000000001";
	 cos4_sig <= "1000000000001001";
	 cos5_sig <= "1000010000000000";
	 cos6_sig <= "0001000000000000";
	 cos7_sig <= "0000000001000000";
	 cos8_sig <= "0000010000000000";
				
	when "111" =>
	 cos1_sig <= "0100000000001000";
	 cos2_sig <= "0000001001000000";
	 cos3_sig <= "0010000100000000";
	 cos4_sig <= "0000010000010000";
	 cos5_sig <= "0010000000000001";
	 cos6_sig <= "0000010000000100";
	 cos7_sig <= "1000000010000000";
	 cos8_sig <= "0000000000000000";
		
	when others => 
	 cos1_sig <= "0000000000000000";
	 cos2_sig <= "0000000000000000";
	 cos3_sig <= "0000000000000000";
	 cos4_sig <= "0000000000000000";
	 cos5_sig <= "0000000000000000";
	 cos6_sig <= "0000000000000000";
	 cos7_sig <= "0000000000000000";
	 cos8_sig <= "0000000000000000";


end case;

end process;

end DCT_cos_arch;