URL
https://opencores.org/ocsvn/mkjpeg/mkjpeg/trunk
Subversion Repositories mkjpeg
[/] [mkjpeg/] [trunk/] [design/] [mdct/] [FDCT.vhd] - Rev 74
Go to most recent revision | Compare with Previous | Blame | View Log
------------------------------------------------------------------------------- -- File Name : FDCT.vhd -- -- Project : JPEG_ENC -- -- Module : FDCT -- -- Content : FDCT -- -- Description : 2D Discrete Cosine Transform -- -- Spec. : -- -- Author : Michal Krepa -- ------------------------------------------------------------------------------- -- History : -- 20090301: (MK): Initial Creation. ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- ----------------------------------- LIBRARY/PACKAGE --------------------------- ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- -- generic packages/libraries: ------------------------------------------------------------------------------- library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all; ------------------------------------------------------------------------------- -- user packages/libraries: ------------------------------------------------------------------------------- library work; use work.JPEG_PKG.all; ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- ----------------------------------- ENTITY ------------------------------------ ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- entity FDCT is port ( CLK : in std_logic; RST : in std_logic; -- CTRL start_pb : in std_logic; ready_pb : out std_logic; fdct_sm_settings : in T_SM_SETTINGS; -- BUF_FIFO bf_fifo_rd : out std_logic; bf_fifo_q : in std_logic_vector(23 downto 0); bf_fifo_hf_full : in std_logic; -- ZIG ZAG zz_buf_sel : in std_logic; zz_rd_addr : in std_logic_vector(5 downto 0); zz_data : out std_logic_vector(11 downto 0); zz_rden : in std_logic; -- HOST img_size_x : in std_logic_vector(15 downto 0); img_size_y : in std_logic_vector(15 downto 0); sof : in std_logic ); end entity FDCT; ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- ----------------------------------- ARCHITECTURE ------------------------------ ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- architecture RTL of FDCT is constant C_Y_1 : signed(14 downto 0) := to_signed(4899, 15); constant C_Y_2 : signed(14 downto 0) := to_signed(9617, 15); constant C_Y_3 : signed(14 downto 0) := to_signed(1868, 15); constant C_Cb_1 : signed(14 downto 0) := to_signed(-2764, 15); constant C_Cb_2 : signed(14 downto 0) := to_signed(-5428, 15); constant C_Cb_3 : signed(14 downto 0) := to_signed(8192, 15); constant C_Cr_1 : signed(14 downto 0) := to_signed(8192, 15); constant C_Cr_2 : signed(14 downto 0) := to_signed(-6860, 15); constant C_Cr_3 : signed(14 downto 0) := to_signed(-1332, 15); signal mdct_data_in : std_logic_vector(7 downto 0); signal mdct_idval : std_logic; signal mdct_odval : std_logic; signal mdct_data_out : std_logic_vector(11 downto 0); signal odv1 : std_logic; signal dcto1 : std_logic_vector(11 downto 0); signal x_pixel_cnt : unsigned(15 downto 0); signal y_line_cnt : unsigned(15 downto 0); signal rd_addr : std_logic_vector(31 downto 0); signal input_rd_cnt : unsigned(6 downto 0); signal rd_en : std_logic; signal rd_en_d1 : std_logic; signal rdaddr : unsigned(31 downto 0); signal bf_dval : std_logic; signal bf_dval_m1 : std_logic; signal bf_dval_m2 : std_logic; signal bf_dval_m3 : std_logic; signal wr_cnt : unsigned(5 downto 0); signal dbuf_data : std_logic_vector(11 downto 0); signal dbuf_q : std_logic_vector(11 downto 0); signal dbuf_we : std_logic; signal dbuf_waddr : std_logic_vector(6 downto 0); signal dbuf_raddr : std_logic_vector(6 downto 0); signal xw_cnt : unsigned(2 downto 0); signal yw_cnt : unsigned(2 downto 0); signal dbuf_q_z1 : std_logic_vector(11 downto 0); constant C_SIMA_ASZ : integer := 9; signal sim_rd_addr : unsigned(C_SIMA_ASZ-1 downto 0); signal Y_reg_1 : signed(23 downto 0); signal Y_reg_2 : signed(23 downto 0); signal Y_reg_3 : signed(23 downto 0); signal Cb_reg_1 : signed(23 downto 0); signal Cb_reg_2 : signed(23 downto 0); signal Cb_reg_3 : signed(23 downto 0); signal Cr_reg_1 : signed(23 downto 0); signal Cr_reg_2 : signed(23 downto 0); signal Cr_reg_3 : signed(23 downto 0); signal Y_reg : signed(23 downto 0); signal Cb_reg : signed(23 downto 0); signal Cr_reg : signed(23 downto 0); signal R_s : signed(8 downto 0); signal G_s : signed(8 downto 0); signal B_s : signed(8 downto 0); signal Y_8bit : unsigned(7 downto 0); signal Cb_8bit : unsigned(7 downto 0); signal Cr_8bit : unsigned(7 downto 0); signal cmp_idx : unsigned(2 downto 0); signal cur_cmp_idx : unsigned(2 downto 0); signal cur_cmp_idx_d1 : unsigned(2 downto 0); signal cur_cmp_idx_d2 : unsigned(2 downto 0); signal cur_cmp_idx_d3 : unsigned(2 downto 0); signal cur_cmp_idx_d4 : unsigned(2 downto 0); signal cur_cmp_idx_d5 : unsigned(2 downto 0); signal cur_cmp_idx_d6 : unsigned(2 downto 0); signal cur_cmp_idx_d7 : unsigned(2 downto 0); signal cur_cmp_idx_d8 : unsigned(2 downto 0); signal cur_cmp_idx_d9 : unsigned(2 downto 0); signal fifo1_rd : std_logic; signal fifo1_wr : std_logic; signal fifo1_q : std_logic_vector(11 downto 0); signal fifo1_full : std_logic; signal fifo1_empty : std_logic; signal fifo1_count : std_logic_vector(9 downto 0); signal fifo1_rd_cnt : unsigned(5 downto 0); signal fifo1_q_dval : std_logic; signal fifo_data_in : std_logic_vector(11 downto 0); signal fifo_rd_arm : std_logic; signal eoi_fdct : std_logic; signal bf_fifo_rd_s : std_logic; signal start_int : std_logic; signal start_int_d : std_logic_vector(4 downto 0); signal fram1_data : std_logic_vector(23 downto 0); signal fram1_q : std_logic_vector(23 downto 0); signal fram1_we : std_logic; signal fram1_waddr : std_logic_vector(6 downto 0); signal fram1_raddr : std_logic_vector(6 downto 0); signal fram1_rd_d : std_logic_vector(8 downto 0); signal fram1_rd : std_logic; signal rd_started : std_logic; signal writing_en : std_logic; signal fram1_q_vld : std_logic; signal fram1_line_cnt : unsigned(2 downto 0); signal fram1_pix_cnt : unsigned(2 downto 0); ------------------------------------------------------------------------------- -- Architecture: begin ------------------------------------------------------------------------------- begin zz_data <= dbuf_q; bf_fifo_rd <= bf_fifo_rd_s; ------------------------------------------------------------------- -- FRAM1 ------------------------------------------------------------------- U_FRAM1 : entity work.RAMZ generic map ( RAMADDR_W => 7, RAMDATA_W => 24 ) port map ( d => fram1_data, waddr => fram1_waddr, raddr => fram1_raddr, we => fram1_we, clk => CLK, q => fram1_q ); fram1_we <= bf_dval; fram1_data <= bf_fifo_q; fram1_q_vld <= fram1_rd_d(5); ------------------------------------------------------------------- -- FRAM1 process ------------------------------------------------------------------- p_fram1_acc : process(CLK, RST) begin if RST = '1' then fram1_waddr <= (others => '0'); elsif CLK'event and CLK = '1' then if fram1_we = '1' then fram1_waddr <= std_logic_vector(unsigned(fram1_waddr) + 1); end if; end if; end process; ------------------------------------------------------------------- -- IRAM read process ------------------------------------------------------------------- p_counter1 : process(CLK, RST) begin if RST = '1' then rd_en <= '0'; rd_en_d1 <= '0'; x_pixel_cnt <= (others => '0'); y_line_cnt <= (others => '0'); input_rd_cnt <= (others => '0'); cmp_idx <= (others => '0'); cur_cmp_idx <= (others => '0'); cur_cmp_idx_d1 <= (others => '0'); cur_cmp_idx_d2 <= (others => '0'); cur_cmp_idx_d3 <= (others => '0'); cur_cmp_idx_d4 <= (others => '0'); cur_cmp_idx_d5 <= (others => '0'); cur_cmp_idx_d6 <= (others => '0'); cur_cmp_idx_d7 <= (others => '0'); cur_cmp_idx_d8 <= (others => '0'); cur_cmp_idx_d9 <= (others => '0'); eoi_fdct <= '0'; start_int <= '0'; bf_fifo_rd_s <= '0'; bf_dval <= '0'; bf_dval_m1 <= '0'; bf_dval_m2 <= '0'; fram1_rd <= '0'; fram1_rd_d <= (others => '0'); start_int_d <= (others => '0'); fram1_raddr <= (others => '0'); fram1_line_cnt <= (others => '0'); fram1_pix_cnt <= (others => '0'); elsif CLK'event and CLK = '1' then rd_en_d1 <= rd_en; cur_cmp_idx_d1 <= cur_cmp_idx; cur_cmp_idx_d2 <= cur_cmp_idx_d1; cur_cmp_idx_d3 <= cur_cmp_idx_d2; cur_cmp_idx_d4 <= cur_cmp_idx_d3; cur_cmp_idx_d5 <= cur_cmp_idx_d4; cur_cmp_idx_d6 <= cur_cmp_idx_d5; cur_cmp_idx_d7 <= cur_cmp_idx_d6; cur_cmp_idx_d8 <= cur_cmp_idx_d7; cur_cmp_idx_d9 <= cur_cmp_idx_d8; start_int <= '0'; bf_dval_m3 <= bf_fifo_rd_s; bf_dval_m2 <= bf_dval_m3; bf_dval_m1 <= bf_dval_m2; bf_dval <= bf_dval_m1; fram1_rd_d <= fram1_rd_d(fram1_rd_d'length-2 downto 0) & fram1_rd; start_int_d <= start_int_d(start_int_d'length-2 downto 0) & start_int; -- SOF or internal self-start if (sof = '1' or start_int = '1') then input_rd_cnt <= (others => '0'); -- enable BUF_FIFO/FRAM1 reading rd_started <= '1'; -- component index if cmp_idx = 4-1 then cmp_idx <= (others => '0'); -- horizontal block counter if x_pixel_cnt = unsigned(img_size_x)-16 then x_pixel_cnt <= (others => '0'); -- vertical block counter if y_line_cnt = unsigned(img_size_y)-8 then y_line_cnt <= (others => '0'); -- set end of image flag eoi_fdct <= '1'; else y_line_cnt <= y_line_cnt + 8; end if; else x_pixel_cnt <= x_pixel_cnt + 16; end if; else cmp_idx <=cmp_idx + 1; end if; cur_cmp_idx <= cmp_idx; end if; -- wait until FIFO becomes half full but only for component 0 -- as we read buf FIFO only during component 0 if rd_started = '1' and (bf_fifo_hf_full = '1' or cur_cmp_idx > 1) then rd_en <= '1'; rd_started <= '0'; end if; bf_fifo_rd_s <= '0'; fram1_rd <= '0'; -- stall reading from input FIFO and writing to output FIFO -- when output FIFO is almost full if rd_en = '1' and unsigned(fifo1_count) < 512-64 and (bf_fifo_hf_full = '1' or cur_cmp_idx > 1) then -- read request goes to BUF_FIFO only for component 0. if cur_cmp_idx < 2 then bf_fifo_rd_s <= '1'; end if; -- count number of samples read from input in one run if input_rd_cnt = 64-1 then rd_en <= '0'; -- internal restart start_int <= '1' and not eoi_fdct; eoi_fdct <= '0'; else input_rd_cnt <= input_rd_cnt + 1; end if; -- FRAM read enable fram1_rd <= '1'; end if; -- increment FRAM1 read address according to subsampling -- idea is to extract 8x8 from 16x8 block -- there are two luminance blocks left and right -- there is 2:1 subsampled Cb block -- there is 2:1 subsampled Cr block -- subsampling done as simple decimation by 2 wo/ averaging if sof = '1' then fram1_raddr <= (others => '0'); fram1_line_cnt <= (others => '0'); fram1_pix_cnt <= (others => '0'); elsif start_int_d(4) = '1' then fram1_line_cnt <= (others => '0'); fram1_pix_cnt <= (others => '0'); case cur_cmp_idx_d4 is -- Y1, Cr, Cb when "000" | "010" | "011" => fram1_raddr <= (others => '0'); -- Y2 when "001" => fram1_raddr <= std_logic_vector(to_unsigned(64, fram1_raddr'length)); when others => null; end case; elsif fram1_rd_d(4) = '1' then if fram1_pix_cnt = 8-1 then fram1_pix_cnt <= (others => '0'); if fram1_line_cnt = 8-1 then fram1_line_cnt <= (others => '0'); else fram1_line_cnt <= fram1_line_cnt + 1; end if; else fram1_pix_cnt <= fram1_pix_cnt + 1; end if; case cur_cmp_idx_d6 is when "000" | "001" => fram1_raddr <= std_logic_vector(unsigned(fram1_raddr) + 1); when "010" | "011" => if fram1_pix_cnt = 4-1 then fram1_raddr <= std_logic_vector('1' & fram1_line_cnt & "000"); elsif fram1_pix_cnt = 8-1 then if fram1_line_cnt = 8-1 then fram1_raddr <= '0' & "000" & "000"; else fram1_raddr <= std_logic_vector('0' & (fram1_line_cnt+1) & "000"); end if; else fram1_raddr <= std_logic_vector(unsigned(fram1_raddr) + 2); end if; when others => null; end case; end if; end if; end process; ------------------------------------------------------------------- -- FDCT with input level shift ------------------------------------------------------------------- U_MDCT : entity work.MDCT port map ( clk => CLK, rst => RST, dcti => mdct_data_in, idv => mdct_idval, odv => mdct_odval, dcto => mdct_data_out, odv1 => odv1, dcto1 => dcto1 ); mdct_idval <= fram1_rd_d(8); R_s <= signed('0' & fram1_q(7 downto 0)); G_s <= signed('0' & fram1_q(15 downto 8)); B_s <= signed('0' & fram1_q(23 downto 16)); ------------------------------------------------------------------- -- Mux1 ------------------------------------------------------------------- p_mux1 : process(CLK, RST) begin if RST = '1' then mdct_data_in <= (others => '0'); elsif CLK'event and CLK = '1' then case cur_cmp_idx_d9 is when "000" | "001" => mdct_data_in <= std_logic_vector(Y_8bit); when "010" => mdct_data_in <= std_logic_vector(Cb_8bit); when "011" => mdct_data_in <= std_logic_vector(Cr_8bit); when others => null; end case; end if; end process; ------------------------------------------------------------------- -- FIFO1 ------------------------------------------------------------------- U_FIFO1 : entity work.FIFO generic map ( DATA_WIDTH => 12, ADDR_WIDTH => 9 ) port map ( rst => RST, clk => CLK, rinc => fifo1_rd, winc => fifo1_wr, datai => fifo_data_in, datao => fifo1_q, fullo => fifo1_full, emptyo => fifo1_empty, count => fifo1_count ); fifo1_wr <= mdct_odval; fifo_data_in <= mdct_data_out; ------------------------------------------------------------------- -- FIFO1 rd controller ------------------------------------------------------------------- p_fifo_rd_ctrl : process(CLK, RST) begin if RST = '1' then fifo1_rd <= '0'; fifo_rd_arm <= '0'; fifo1_rd_cnt <= (others => '0'); fifo1_q_dval <= '0'; elsif CLK'event and CLK = '1' then fifo1_rd <= '0'; fifo1_q_dval <= fifo1_rd; if start_pb = '1' then fifo_rd_arm <= '1'; fifo1_rd_cnt <= (others => '0'); end if; if fifo_rd_arm = '1' then if fifo1_rd_cnt = 64-1 then fifo_rd_arm <= '0'; fifo1_rd <= '1'; elsif fifo1_empty = '0' then fifo1_rd <= '1'; fifo1_rd_cnt <= fifo1_rd_cnt + 1; end if; end if; end if; end process; ------------------------------------------------------------------- -- write counter ------------------------------------------------------------------- p_wr_cnt : process(CLK, RST) begin if RST = '1' then wr_cnt <= (others => '0'); ready_pb <= '0'; xw_cnt <= (others => '0'); yw_cnt <= (others => '0'); writing_en <= '0'; elsif CLK'event and CLK = '1' then ready_pb <= '0'; if start_pb = '1' then wr_cnt <= (others => '0'); xw_cnt <= (others => '0'); yw_cnt <= (others => '0'); writing_en <= '1'; end if; if writing_en = '1' then if fifo1_q_dval = '1' then if wr_cnt = 64-1 then wr_cnt <= (others => '0'); ready_pb <= '1'; writing_en <= '0'; else wr_cnt <= wr_cnt + 1; end if; if yw_cnt = 8-1 then yw_cnt <= (others => '0'); xw_cnt <= xw_cnt+1; else yw_cnt <= yw_cnt+1; end if; end if; end if; end if; end process; ------------------------------------------------------------------- -- RGB to YCbCr conversion ------------------------------------------------------------------- p_rgb2ycbcr : process(CLK, RST) begin if RST = '1' then Y_Reg_1 <= (others => '0'); Y_Reg_2 <= (others => '0'); Y_Reg_3 <= (others => '0'); Cb_Reg_1 <= (others => '0'); Cb_Reg_2 <= (others => '0'); Cb_Reg_3 <= (others => '0'); Cr_Reg_1 <= (others => '0'); Cr_Reg_2 <= (others => '0'); Cr_Reg_3 <= (others => '0'); Y_Reg <= (others => '0'); Cb_Reg <= (others => '0'); Cr_Reg <= (others => '0'); elsif CLK'event and CLK = '1' then -- RGB input if C_YUV_INPUT = '0' then Y_Reg_1 <= R_s*C_Y_1; Y_Reg_2 <= G_s*C_Y_2; Y_Reg_3 <= B_s*C_Y_3; Cb_Reg_1 <= R_s*C_Cb_1; Cb_Reg_2 <= G_s*C_Cb_2; Cb_Reg_3 <= B_s*C_Cb_3; Cr_Reg_1 <= R_s*C_Cr_1; Cr_Reg_2 <= G_s*C_Cr_2; Cr_Reg_3 <= B_s*C_Cr_3; Y_Reg <= Y_Reg_1 + Y_Reg_2 + Y_Reg_3; Cb_Reg <= Cb_Reg_1 + Cb_Reg_2 + Cb_Reg_3 + to_signed(128*16384,Cb_Reg'length); Cr_Reg <= Cr_Reg_1 + Cr_Reg_2 + Cr_Reg_3 + to_signed(128*16384,Cr_Reg'length); -- YCbCr input -- R-G-B misused as Y-Cb-Cr else Y_Reg_1 <= '0' & R_s & "00000000000000"; Cb_Reg_1 <= '0' & G_s & "00000000000000"; Cr_Reg_1 <= '0' & B_s & "00000000000000"; Y_Reg <= Y_Reg_1; Cb_Reg <= Cb_Reg_1; Cr_Reg <= Cr_Reg_1; end if; end if; end process; Y_8bit <= unsigned(Y_Reg(21 downto 14)); Cb_8bit <= unsigned(Cb_Reg(21 downto 14)); Cr_8bit <= unsigned(Cr_Reg(21 downto 14)); ------------------------------------------------------------------- -- DBUF ------------------------------------------------------------------- U_RAMZ : entity work.RAMZ generic map ( RAMADDR_W => 7, RAMDATA_W => 12 ) port map ( d => dbuf_data, waddr => dbuf_waddr, raddr => dbuf_raddr, we => dbuf_we, clk => CLK, q => dbuf_q ); dbuf_data <= fifo1_q; dbuf_we <= fifo1_q_dval; dbuf_waddr <= (not zz_buf_sel) & std_logic_vector(yw_cnt & xw_cnt); dbuf_raddr <= zz_buf_sel & zz_rd_addr; end architecture RTL; ------------------------------------------------------------------------------- -- Architecture: end -------------------------------------------------------------------------------
Go to most recent revision | Compare with Previous | Blame | View Log