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library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.pixel_pkg;
package pixel_column_pkg is
generic(
NBITS_IN : natural;
NBR_OF_CHROMA_IN : natural;
NBR_OF_ROW_IN : natural;
NBITS_OUT : natural;
NBR_OF_CHROMA_OUT : natural;
NBR_OF_ROW_OUT : natural;
package local_pixel_pkg is new pixel_pkg
generic map (<>)
);
use local_pixel_pkg.all;
type TYPE_PIXEL_COLUMN_IN is array (NBR_OF_ROW_IN-1 downto 0) of TYPE_PIXEL_IN;
type TYPE_PIXEL_COLUMN_OUT is array (NBR_OF_ROW_OUT-1 downto 0) of TYPE_PIXEL_OUT;
function std_logic_vector_to_pixel_column_in( in_vector : in std_logic_vector(NBR_OF_ROW_IN*NBR_OF_CHROMA_IN*NBITS_IN-1 downto 0))
return TYPE_PIXEL_COLUMN_IN;
function pixel_column_out_to_std_logic_vector( out_pixel_column : in TYPE_PIXEL_COLUMN_OUT)
return std_logic_vector;
function "not" ( pixel_column_in : in TYPE_PIXEL_COLUMN_IN)
return TYPE_PIXEL_COLUMN_OUT;
end package pixel_column_pkg;
package body pixel_column_pkg is
function std_logic_vector_to_pixel_column_in( in_vector : in std_logic_vector(NBR_OF_ROW_IN*NBR_OF_CHROMA_IN*NBITS_IN-1 downto 0))
return TYPE_PIXEL_COLUMN_IN is
variable pixel_column_in : TYPE_PIXEL_COLUMN_IN;
begin
for row in 0 to NBR_OF_ROW_IN -1 loop
pixel_column_in(row) := std_logic_vector_to_pixel_in(in_vector((row+1)*NBR_OF_CHROMA_IN*NBITS_IN-1 downto row*NBR_OF_CHROMA_IN*NBITS_IN));
end loop;
return pixel_column_in;
end function std_logic_vector_to_pixel_column_in;
function pixel_column_out_to_std_logic_vector( out_pixel_column : in TYPE_PIXEL_COLUMN_OUT)
return std_logic_vector is
variable out_vector : std_logic_vector(NBR_OF_ROW_OUT*NBR_OF_CHROMA_OUT*NBITS_OUT-1 downto 0);
begin
for row in 0 to NBR_OF_ROW_OUT loop
out_vector((row+1)*NBR_OF_CHROMA_IN*NBITS_IN-1 downto row*NBR_OF_CHROMA_IN*NBITS_IN) := pixel_out_to_std_logic_vector(out_pixel_column(row));
end loop;
return out_vector;
end function pixel_column_out_to_std_logic_vector;
function "not" ( pixel_column_in : in TYPE_PIXEL_COLUMN_IN)
return TYPE_PIXEL_COLUMN_OUT is
variable pixel_column_out : TYPE_PIXEL_COLUMN_OUT;
begin
for index in pixel_column_in'range loop
pixel_column_out(index) := not pixel_column_in(index);
end loop;
return pixel_column_out;
end function "not";
end package body pixel_column_pkg;
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