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davidklun |
/////////////////////////////////////////////////////////////////////
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//// ////
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//// JPEG Encoder Core - Verilog ////
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//// ////
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//// Author: David Lundgren ////
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//// davidklun@gmail.com ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2009 David Lundgren ////
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//// davidklun@gmail.com ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer.////
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//// ////
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//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
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//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
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//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
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//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
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//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
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//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
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//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
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//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
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//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
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//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
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//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
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//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
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//// POSSIBILITY OF SUCH DAMAGE. ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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/* This module converts the incoming Cb data.
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The incoming data is unsigned 8 bits, so the data is in the range of 0-255
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Unlike a typical DCT, the data is not subtracted by 128 to center it around 0.
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It is only required for the first row, and instead of subtracting 128 from each
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pixel value, a total value can be subtracted at the end of the first row/column multiply,
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involving the 8 pixel values and the 8 DCT matrix values.
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For the other 7 rows of the DCT matrix, the values in each row add up to 0,
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so it is not necessary to subtract 128 from each Y, Cb, and Cr pixel value.
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Then the Discrete Cosine Transform is performed by multiplying the 8x8 pixel block values
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by the 8x8 DCT matrix. */
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`timescale 1ns / 100ps
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module cb_dct(clk, rst, enable, data_in,
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Z11_final, Z12_final, Z13_final, Z14_final, Z15_final, Z16_final, Z17_final, Z18_final,
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Z21_final, Z22_final, Z23_final, Z24_final, Z25_final, Z26_final, Z27_final, Z28_final,
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Z31_final, Z32_final, Z33_final, Z34_final, Z35_final, Z36_final, Z37_final, Z38_final,
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Z41_final, Z42_final, Z43_final, Z44_final, Z45_final, Z46_final, Z47_final, Z48_final,
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Z51_final, Z52_final, Z53_final, Z54_final, Z55_final, Z56_final, Z57_final, Z58_final,
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Z61_final, Z62_final, Z63_final, Z64_final, Z65_final, Z66_final, Z67_final, Z68_final,
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Z71_final, Z72_final, Z73_final, Z74_final, Z75_final, Z76_final, Z77_final, Z78_final,
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Z81_final, Z82_final, Z83_final, Z84_final, Z85_final, Z86_final, Z87_final, Z88_final,
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output_enable);
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input clk;
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input rst;
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input enable;
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input [7:0] data_in;
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output [10:0] Z11_final, Z12_final, Z13_final, Z14_final;
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output [10:0] Z15_final, Z16_final, Z17_final, Z18_final;
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output [10:0] Z21_final, Z22_final, Z23_final, Z24_final;
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output [10:0] Z25_final, Z26_final, Z27_final, Z28_final;
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output [10:0] Z31_final, Z32_final, Z33_final, Z34_final;
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output [10:0] Z35_final, Z36_final, Z37_final, Z38_final;
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output [10:0] Z41_final, Z42_final, Z43_final, Z44_final;
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output [10:0] Z45_final, Z46_final, Z47_final, Z48_final;
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output [10:0] Z51_final, Z52_final, Z53_final, Z54_final;
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output [10:0] Z55_final, Z56_final, Z57_final, Z58_final;
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output [10:0] Z61_final, Z62_final, Z63_final, Z64_final;
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output [10:0] Z65_final, Z66_final, Z67_final, Z68_final;
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output [10:0] Z71_final, Z72_final, Z73_final, Z74_final;
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output [10:0] Z75_final, Z76_final, Z77_final, Z78_final;
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output [10:0] Z81_final, Z82_final, Z83_final, Z84_final;
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output [10:0] Z85_final, Z86_final, Z87_final, Z88_final;
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output output_enable;
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integer T1, T21, T22, T23, T24, T25, T26, T27, T28, T31, T32, T33, T34, T52;
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integer Ti1, Ti21, Ti22, Ti23, Ti24, Ti25, Ti26, Ti27, Ti28, Ti31, Ti32, Ti33, Ti34, Ti52;
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reg [24:0] Cb_temp_11;
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reg [24:0] Cb11, Cb21, Cb31, Cb41, Cb51, Cb61, Cb71, Cb81, Cb11_final;
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reg [31:0] Cb_temp_21, Cb_temp_31, Cb_temp_41, Cb_temp_51;
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reg [31:0] Cb_temp_61, Cb_temp_71, Cb_temp_81;
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reg [31:0] Z_temp_11, Z_temp_12, Z_temp_13, Z_temp_14;
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reg [31:0] Z_temp_15, Z_temp_16, Z_temp_17, Z_temp_18;
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reg [31:0] Z_temp_21, Z_temp_22, Z_temp_23, Z_temp_24;
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reg [31:0] Z_temp_25, Z_temp_26, Z_temp_27, Z_temp_28;
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reg [31:0] Z_temp_31, Z_temp_32, Z_temp_33, Z_temp_34;
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reg [31:0] Z_temp_35, Z_temp_36, Z_temp_37, Z_temp_38;
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reg [31:0] Z_temp_41, Z_temp_42, Z_temp_43, Z_temp_44;
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reg [31:0] Z_temp_45, Z_temp_46, Z_temp_47, Z_temp_48;
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reg [31:0] Z_temp_51, Z_temp_52, Z_temp_53, Z_temp_54;
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reg [31:0] Z_temp_55, Z_temp_56, Z_temp_57, Z_temp_58;
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reg [31:0] Z_temp_61, Z_temp_62, Z_temp_63, Z_temp_64;
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reg [31:0] Z_temp_65, Z_temp_66, Z_temp_67, Z_temp_68;
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reg [31:0] Z_temp_71, Z_temp_72, Z_temp_73, Z_temp_74;
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reg [31:0] Z_temp_75, Z_temp_76, Z_temp_77, Z_temp_78;
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reg [31:0] Z_temp_81, Z_temp_82, Z_temp_83, Z_temp_84;
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reg [31:0] Z_temp_85, Z_temp_86, Z_temp_87, Z_temp_88;
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reg [24:0] Z11, Z12, Z13, Z14, Z15, Z16, Z17, Z18;
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reg [24:0] Z21, Z22, Z23, Z24, Z25, Z26, Z27, Z28;
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reg [24:0] Z31, Z32, Z33, Z34, Z35, Z36, Z37, Z38;
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reg [24:0] Z41, Z42, Z43, Z44, Z45, Z46, Z47, Z48;
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reg [24:0] Z51, Z52, Z53, Z54, Z55, Z56, Z57, Z58;
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reg [24:0] Z61, Z62, Z63, Z64, Z65, Z66, Z67, Z68;
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reg [24:0] Z71, Z72, Z73, Z74, Z75, Z76, Z77, Z78;
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reg [24:0] Z81, Z82, Z83, Z84, Z85, Z86, Z87, Z88;
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reg [31:0] Cb11_final_2, Cb21_final_2, Cb11_final_3, Cb11_final_4, Cb31_final_2, Cb41_final_2;
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reg [31:0] Cb51_final_2, Cb61_final_2, Cb71_final_2, Cb81_final_2;
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reg [10:0] Cb11_final_1, Cb21_final_1, Cb31_final_1, Cb41_final_1;
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reg [10:0] Cb51_final_1, Cb61_final_1, Cb71_final_1, Cb81_final_1;
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reg [24:0] Cb21_final, Cb31_final, Cb41_final, Cb51_final;
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reg [24:0] Cb61_final, Cb71_final, Cb81_final;
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reg [24:0] Cb21_final_prev, Cb21_final_diff;
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reg [24:0] Cb31_final_prev, Cb31_final_diff;
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reg [24:0] Cb41_final_prev, Cb41_final_diff;
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reg [24:0] Cb51_final_prev, Cb51_final_diff;
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reg [24:0] Cb61_final_prev, Cb61_final_diff;
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reg [24:0] Cb71_final_prev, Cb71_final_diff;
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reg [24:0] Cb81_final_prev, Cb81_final_diff;
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reg [10:0] Z11_final, Z12_final, Z13_final, Z14_final;
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reg [10:0] Z15_final, Z16_final, Z17_final, Z18_final;
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reg [10:0] Z21_final, Z22_final, Z23_final, Z24_final;
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reg [10:0] Z25_final, Z26_final, Z27_final, Z28_final;
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reg [10:0] Z31_final, Z32_final, Z33_final, Z34_final;
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reg [10:0] Z35_final, Z36_final, Z37_final, Z38_final;
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reg [10:0] Z41_final, Z42_final, Z43_final, Z44_final;
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reg [10:0] Z45_final, Z46_final, Z47_final, Z48_final;
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reg [10:0] Z51_final, Z52_final, Z53_final, Z54_final;
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reg [10:0] Z55_final, Z56_final, Z57_final, Z58_final;
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reg [10:0] Z61_final, Z62_final, Z63_final, Z64_final;
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reg [10:0] Z65_final, Z66_final, Z67_final, Z68_final;
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reg [10:0] Z71_final, Z72_final, Z73_final, Z74_final;
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reg [10:0] Z75_final, Z76_final, Z77_final, Z78_final;
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reg [10:0] Z81_final, Z82_final, Z83_final, Z84_final;
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reg [10:0] Z85_final, Z86_final, Z87_final, Z88_final;
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reg [2:0] count;
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reg [2:0] count_of, count_of_copy;
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reg count_1, count_3, count_4, count_5, count_6, count_7, count_8, enable_1, output_enable;
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reg count_9, count_10;
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reg [7:0] data_1;
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integer Cb2_mul_input, Cb3_mul_input, Cb4_mul_input, Cb5_mul_input;
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integer Cb6_mul_input, Cb7_mul_input, Cb8_mul_input;
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integer Ti2_mul_input, Ti3_mul_input, Ti4_mul_input, Ti5_mul_input;
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integer Ti6_mul_input, Ti7_mul_input, Ti8_mul_input;
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always @(posedge clk)
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begin // DCT matrix entries
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T1 = 5793; // .3536
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T21 = 8035; // .4904
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T22 = 6811; // .4157
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T23 = 4551; // .2778
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T24 = 1598; // .0975
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T25 = -1598; // -.0975
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T26 = -4551; // -.2778
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T27 = -6811; // -.4157
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T28 = -8035; // -.4904
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T31 = 7568; // .4619
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T32 = 3135; // .1913
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T33 = -3135; // -.1913
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T34 = -7568; // -.4619
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T52 = -5793; // -.3536
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end
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always @(posedge clk)
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begin // The inverse DCT matrix entries
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Ti1 = 5793; // .3536
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Ti21 = 8035; // .4904
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Ti22 = 6811; // .4157
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Ti23 = 4551; // .2778
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Ti24 = 1598; // .0975
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Ti25 = -1598; // -.0975
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Ti26 = -4551; // -.2778
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Ti27 = -6811; // -.4157
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Ti28 = -8035; // -.4904
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Ti31 = 7568; // .4619
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Ti32 = 3135; // .1913
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Ti33 = -3135; // -.1913
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Ti34 = -7568; // -.4619
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Ti52 = -5793; // -.3536
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end
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always @(posedge clk)
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begin
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if (rst) begin
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Z_temp_11 <= 0; Z_temp_12 <= 0; Z_temp_13 <= 0; Z_temp_14 <= 0;
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Z_temp_15 <= 0; Z_temp_16 <= 0; Z_temp_17 <= 0; Z_temp_18 <= 0;
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Z_temp_21 <= 0; Z_temp_22 <= 0; Z_temp_23 <= 0; Z_temp_24 <= 0;
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Z_temp_25 <= 0; Z_temp_26 <= 0; Z_temp_27 <= 0; Z_temp_28 <= 0;
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Z_temp_31 <= 0; Z_temp_32 <= 0; Z_temp_33 <= 0; Z_temp_34 <= 0;
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Z_temp_35 <= 0; Z_temp_36 <= 0; Z_temp_37 <= 0; Z_temp_38 <= 0;
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Z_temp_41 <= 0; Z_temp_42 <= 0; Z_temp_43 <= 0; Z_temp_44 <= 0;
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Z_temp_45 <= 0; Z_temp_46 <= 0; Z_temp_47 <= 0; Z_temp_48 <= 0;
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Z_temp_51 <= 0; Z_temp_52 <= 0; Z_temp_53 <= 0; Z_temp_54 <= 0;
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Z_temp_55 <= 0; Z_temp_56 <= 0; Z_temp_57 <= 0; Z_temp_58 <= 0;
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Z_temp_61 <= 0; Z_temp_62 <= 0; Z_temp_63 <= 0; Z_temp_64 <= 0;
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Z_temp_65 <= 0; Z_temp_66 <= 0; Z_temp_67 <= 0; Z_temp_68 <= 0;
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Z_temp_71 <= 0; Z_temp_72 <= 0; Z_temp_73 <= 0; Z_temp_74 <= 0;
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Z_temp_75 <= 0; Z_temp_76 <= 0; Z_temp_77 <= 0; Z_temp_78 <= 0;
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Z_temp_81 <= 0; Z_temp_82 <= 0; Z_temp_83 <= 0; Z_temp_84 <= 0;
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Z_temp_85 <= 0; Z_temp_86 <= 0; Z_temp_87 <= 0; Z_temp_88 <= 0;
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end
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else if (enable_1 & count_8) begin
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Z_temp_11 <= Cb11_final_4 * Ti1; Z_temp_12 <= Cb11_final_4 * Ti2_mul_input;
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Z_temp_13 <= Cb11_final_4 * Ti3_mul_input; Z_temp_14 <= Cb11_final_4 * Ti4_mul_input;
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Z_temp_15 <= Cb11_final_4 * Ti5_mul_input; Z_temp_16 <= Cb11_final_4 * Ti6_mul_input;
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Z_temp_17 <= Cb11_final_4 * Ti7_mul_input; Z_temp_18 <= Cb11_final_4 * Ti8_mul_input;
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Z_temp_21 <= Cb21_final_2 * Ti1; Z_temp_22 <= Cb21_final_2 * Ti2_mul_input;
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Z_temp_23 <= Cb21_final_2 * Ti3_mul_input; Z_temp_24 <= Cb21_final_2 * Ti4_mul_input;
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Z_temp_25 <= Cb21_final_2 * Ti5_mul_input; Z_temp_26 <= Cb21_final_2 * Ti6_mul_input;
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Z_temp_27 <= Cb21_final_2 * Ti7_mul_input; Z_temp_28 <= Cb21_final_2 * Ti8_mul_input;
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Z_temp_31 <= Cb31_final_2 * Ti1; Z_temp_32 <= Cb31_final_2 * Ti2_mul_input;
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Z_temp_33 <= Cb31_final_2 * Ti3_mul_input; Z_temp_34 <= Cb31_final_2 * Ti4_mul_input;
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Z_temp_35 <= Cb31_final_2 * Ti5_mul_input; Z_temp_36 <= Cb31_final_2 * Ti6_mul_input;
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Z_temp_37 <= Cb31_final_2 * Ti7_mul_input; Z_temp_38 <= Cb31_final_2 * Ti8_mul_input;
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Z_temp_41 <= Cb41_final_2 * Ti1; Z_temp_42 <= Cb41_final_2 * Ti2_mul_input;
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Z_temp_43 <= Cb41_final_2 * Ti3_mul_input; Z_temp_44 <= Cb41_final_2 * Ti4_mul_input;
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Z_temp_45 <= Cb41_final_2 * Ti5_mul_input; Z_temp_46 <= Cb41_final_2 * Ti6_mul_input;
|
| 223 |
|
|
Z_temp_47 <= Cb41_final_2 * Ti7_mul_input; Z_temp_48 <= Cb41_final_2 * Ti8_mul_input;
|
| 224 |
|
|
Z_temp_51 <= Cb51_final_2 * Ti1; Z_temp_52 <= Cb51_final_2 * Ti2_mul_input;
|
| 225 |
|
|
Z_temp_53 <= Cb51_final_2 * Ti3_mul_input; Z_temp_54 <= Cb51_final_2 * Ti4_mul_input;
|
| 226 |
|
|
Z_temp_55 <= Cb51_final_2 * Ti5_mul_input; Z_temp_56 <= Cb51_final_2 * Ti6_mul_input;
|
| 227 |
|
|
Z_temp_57 <= Cb51_final_2 * Ti7_mul_input; Z_temp_58 <= Cb51_final_2 * Ti8_mul_input;
|
| 228 |
|
|
Z_temp_61 <= Cb61_final_2 * Ti1; Z_temp_62 <= Cb61_final_2 * Ti2_mul_input;
|
| 229 |
|
|
Z_temp_63 <= Cb61_final_2 * Ti3_mul_input; Z_temp_64 <= Cb61_final_2 * Ti4_mul_input;
|
| 230 |
|
|
Z_temp_65 <= Cb61_final_2 * Ti5_mul_input; Z_temp_66 <= Cb61_final_2 * Ti6_mul_input;
|
| 231 |
|
|
Z_temp_67 <= Cb61_final_2 * Ti7_mul_input; Z_temp_68 <= Cb61_final_2 * Ti8_mul_input;
|
| 232 |
|
|
Z_temp_71 <= Cb71_final_2 * Ti1; Z_temp_72 <= Cb71_final_2 * Ti2_mul_input;
|
| 233 |
|
|
Z_temp_73 <= Cb71_final_2 * Ti3_mul_input; Z_temp_74 <= Cb71_final_2 * Ti4_mul_input;
|
| 234 |
|
|
Z_temp_75 <= Cb71_final_2 * Ti5_mul_input; Z_temp_76 <= Cb71_final_2 * Ti6_mul_input;
|
| 235 |
|
|
Z_temp_77 <= Cb71_final_2 * Ti7_mul_input; Z_temp_78 <= Cb71_final_2 * Ti8_mul_input;
|
| 236 |
|
|
Z_temp_81 <= Cb81_final_2 * Ti1; Z_temp_82 <= Cb81_final_2 * Ti2_mul_input;
|
| 237 |
|
|
Z_temp_83 <= Cb81_final_2 * Ti3_mul_input; Z_temp_84 <= Cb81_final_2 * Ti4_mul_input;
|
| 238 |
|
|
Z_temp_85 <= Cb81_final_2 * Ti5_mul_input; Z_temp_86 <= Cb81_final_2 * Ti6_mul_input;
|
| 239 |
|
|
Z_temp_87 <= Cb81_final_2 * Ti7_mul_input; Z_temp_88 <= Cb81_final_2 * Ti8_mul_input;
|
| 240 |
|
|
end
|
| 241 |
|
|
end
|
| 242 |
|
|
|
| 243 |
|
|
always @(posedge clk)
|
| 244 |
|
|
begin
|
| 245 |
|
|
if (rst) begin
|
| 246 |
|
|
Z11 <= 0; Z12 <= 0; Z13 <= 0; Z14 <= 0; Z15 <= 0; Z16 <= 0; Z17 <= 0; Z18 <= 0;
|
| 247 |
|
|
Z21 <= 0; Z22 <= 0; Z23 <= 0; Z24 <= 0; Z25 <= 0; Z26 <= 0; Z27 <= 0; Z28 <= 0;
|
| 248 |
|
|
Z31 <= 0; Z32 <= 0; Z33 <= 0; Z34 <= 0; Z35 <= 0; Z36 <= 0; Z37 <= 0; Z38 <= 0;
|
| 249 |
|
|
Z41 <= 0; Z42 <= 0; Z43 <= 0; Z44 <= 0; Z45 <= 0; Z46 <= 0; Z47 <= 0; Z48 <= 0;
|
| 250 |
|
|
Z51 <= 0; Z52 <= 0; Z53 <= 0; Z54 <= 0; Z55 <= 0; Z56 <= 0; Z57 <= 0; Z58 <= 0;
|
| 251 |
|
|
Z61 <= 0; Z62 <= 0; Z63 <= 0; Z64 <= 0; Z65 <= 0; Z66 <= 0; Z67 <= 0; Z68 <= 0;
|
| 252 |
|
|
Z71 <= 0; Z72 <= 0; Z73 <= 0; Z74 <= 0; Z75 <= 0; Z76 <= 0; Z77 <= 0; Z78 <= 0;
|
| 253 |
|
|
Z81 <= 0; Z82 <= 0; Z83 <= 0; Z84 <= 0; Z85 <= 0; Z86 <= 0; Z87 <= 0; Z88 <= 0;
|
| 254 |
|
|
end
|
| 255 |
|
|
else if (count_8 & count_of == 1) begin
|
| 256 |
|
|
Z11 <= 0; Z12 <= 0; Z13 <= 0; Z14 <= 0;
|
| 257 |
|
|
Z15 <= 0; Z16 <= 0; Z17 <= 0; Z18 <= 0;
|
| 258 |
|
|
Z21 <= 0; Z22 <= 0; Z23 <= 0; Z24 <= 0;
|
| 259 |
|
|
Z25 <= 0; Z26 <= 0; Z27 <= 0; Z28 <= 0;
|
| 260 |
|
|
Z31 <= 0; Z32 <= 0; Z33 <= 0; Z34 <= 0;
|
| 261 |
|
|
Z35 <= 0; Z36 <= 0; Z37 <= 0; Z38 <= 0;
|
| 262 |
|
|
Z41 <= 0; Z42 <= 0; Z43 <= 0; Z44 <= 0;
|
| 263 |
|
|
Z45 <= 0; Z46 <= 0; Z47 <= 0; Z48 <= 0;
|
| 264 |
|
|
Z51 <= 0; Z52 <= 0; Z53 <= 0; Z54 <= 0;
|
| 265 |
|
|
Z55 <= 0; Z56 <= 0; Z57 <= 0; Z58 <= 0;
|
| 266 |
|
|
Z61 <= 0; Z62 <= 0; Z63 <= 0; Z64 <= 0;
|
| 267 |
|
|
Z65 <= 0; Z66 <= 0; Z67 <= 0; Z68 <= 0;
|
| 268 |
|
|
Z71 <= 0; Z72 <= 0; Z73 <= 0; Z74 <= 0;
|
| 269 |
|
|
Z75 <= 0; Z76 <= 0; Z77 <= 0; Z78 <= 0;
|
| 270 |
|
|
Z81 <= 0; Z82 <= 0; Z83 <= 0; Z84 <= 0;
|
| 271 |
|
|
Z85 <= 0; Z86 <= 0; Z87 <= 0; Z88 <= 0;
|
| 272 |
|
|
end
|
| 273 |
|
|
else if (enable & count_9) begin
|
| 274 |
|
|
Z11 <= Z_temp_11 + Z11; Z12 <= Z_temp_12 + Z12; Z13 <= Z_temp_13 + Z13; Z14 <= Z_temp_14 + Z14;
|
| 275 |
|
|
Z15 <= Z_temp_15 + Z15; Z16 <= Z_temp_16 + Z16; Z17 <= Z_temp_17 + Z17; Z18 <= Z_temp_18 + Z18;
|
| 276 |
|
|
Z21 <= Z_temp_21 + Z21; Z22 <= Z_temp_22 + Z22; Z23 <= Z_temp_23 + Z23; Z24 <= Z_temp_24 + Z24;
|
| 277 |
|
|
Z25 <= Z_temp_25 + Z25; Z26 <= Z_temp_26 + Z26; Z27 <= Z_temp_27 + Z27; Z28 <= Z_temp_28 + Z28;
|
| 278 |
|
|
Z31 <= Z_temp_31 + Z31; Z32 <= Z_temp_32 + Z32; Z33 <= Z_temp_33 + Z33; Z34 <= Z_temp_34 + Z34;
|
| 279 |
|
|
Z35 <= Z_temp_35 + Z35; Z36 <= Z_temp_36 + Z36; Z37 <= Z_temp_37 + Z37; Z38 <= Z_temp_38 + Z38;
|
| 280 |
|
|
Z41 <= Z_temp_41 + Z41; Z42 <= Z_temp_42 + Z42; Z43 <= Z_temp_43 + Z43; Z44 <= Z_temp_44 + Z44;
|
| 281 |
|
|
Z45 <= Z_temp_45 + Z45; Z46 <= Z_temp_46 + Z46; Z47 <= Z_temp_47 + Z47; Z48 <= Z_temp_48 + Z48;
|
| 282 |
|
|
Z51 <= Z_temp_51 + Z51; Z52 <= Z_temp_52 + Z52; Z53 <= Z_temp_53 + Z53; Z54 <= Z_temp_54 + Z54;
|
| 283 |
|
|
Z55 <= Z_temp_55 + Z55; Z56 <= Z_temp_56 + Z56; Z57 <= Z_temp_57 + Z57; Z58 <= Z_temp_58 + Z58;
|
| 284 |
|
|
Z61 <= Z_temp_61 + Z61; Z62 <= Z_temp_62 + Z62; Z63 <= Z_temp_63 + Z63; Z64 <= Z_temp_64 + Z64;
|
| 285 |
|
|
Z65 <= Z_temp_65 + Z65; Z66 <= Z_temp_66 + Z66; Z67 <= Z_temp_67 + Z67; Z68 <= Z_temp_68 + Z68;
|
| 286 |
|
|
Z71 <= Z_temp_71 + Z71; Z72 <= Z_temp_72 + Z72; Z73 <= Z_temp_73 + Z73; Z74 <= Z_temp_74 + Z74;
|
| 287 |
|
|
Z75 <= Z_temp_75 + Z75; Z76 <= Z_temp_76 + Z76; Z77 <= Z_temp_77 + Z77; Z78 <= Z_temp_78 + Z78;
|
| 288 |
|
|
Z81 <= Z_temp_81 + Z81; Z82 <= Z_temp_82 + Z82; Z83 <= Z_temp_83 + Z83; Z84 <= Z_temp_84 + Z84;
|
| 289 |
|
|
Z85 <= Z_temp_85 + Z85; Z86 <= Z_temp_86 + Z86; Z87 <= Z_temp_87 + Z87; Z88 <= Z_temp_88 + Z88;
|
| 290 |
|
|
end
|
| 291 |
|
|
end
|
| 292 |
|
|
|
| 293 |
|
|
always @(posedge clk)
|
| 294 |
|
|
begin
|
| 295 |
|
|
if (rst) begin
|
| 296 |
|
|
Z11_final <= 0; Z12_final <= 0; Z13_final <= 0; Z14_final <= 0;
|
| 297 |
|
|
Z15_final <= 0; Z16_final <= 0; Z17_final <= 0; Z18_final <= 0;
|
| 298 |
|
|
Z21_final <= 0; Z22_final <= 0; Z23_final <= 0; Z24_final <= 0;
|
| 299 |
|
|
Z25_final <= 0; Z26_final <= 0; Z27_final <= 0; Z28_final <= 0;
|
| 300 |
|
|
Z31_final <= 0; Z32_final <= 0; Z33_final <= 0; Z34_final <= 0;
|
| 301 |
|
|
Z35_final <= 0; Z36_final <= 0; Z37_final <= 0; Z38_final <= 0;
|
| 302 |
|
|
Z41_final <= 0; Z42_final <= 0; Z43_final <= 0; Z44_final <= 0;
|
| 303 |
|
|
Z45_final <= 0; Z46_final <= 0; Z47_final <= 0; Z48_final <= 0;
|
| 304 |
|
|
Z51_final <= 0; Z52_final <= 0; Z53_final <= 0; Z54_final <= 0;
|
| 305 |
|
|
Z55_final <= 0; Z56_final <= 0; Z57_final <= 0; Z58_final <= 0;
|
| 306 |
|
|
Z61_final <= 0; Z62_final <= 0; Z63_final <= 0; Z64_final <= 0;
|
| 307 |
|
|
Z65_final <= 0; Z66_final <= 0; Z67_final <= 0; Z68_final <= 0;
|
| 308 |
|
|
Z71_final <= 0; Z72_final <= 0; Z73_final <= 0; Z74_final <= 0;
|
| 309 |
|
|
Z75_final <= 0; Z76_final <= 0; Z77_final <= 0; Z78_final <= 0;
|
| 310 |
|
|
Z81_final <= 0; Z82_final <= 0; Z83_final <= 0; Z84_final <= 0;
|
| 311 |
|
|
Z85_final <= 0; Z86_final <= 0; Z87_final <= 0; Z88_final <= 0;
|
| 312 |
|
|
end
|
| 313 |
|
|
else if (count_10 & count_of == 0) begin
|
| 314 |
|
|
Z11_final <= Z11[13] ? Z11[24:14] + 1 : Z11[24:14];
|
| 315 |
|
|
Z12_final <= Z12[13] ? Z12[24:14] + 1 : Z12[24:14];
|
| 316 |
|
|
Z13_final <= Z13[13] ? Z13[24:14] + 1 : Z13[24:14];
|
| 317 |
|
|
Z14_final <= Z14[13] ? Z14[24:14] + 1 : Z14[24:14];
|
| 318 |
|
|
Z15_final <= Z15[13] ? Z15[24:14] + 1 : Z15[24:14];
|
| 319 |
|
|
Z16_final <= Z16[13] ? Z16[24:14] + 1 : Z16[24:14];
|
| 320 |
|
|
Z17_final <= Z17[13] ? Z17[24:14] + 1 : Z17[24:14];
|
| 321 |
|
|
Z18_final <= Z18[13] ? Z18[24:14] + 1 : Z18[24:14];
|
| 322 |
|
|
Z21_final <= Z21[13] ? Z21[24:14] + 1 : Z21[24:14];
|
| 323 |
|
|
Z22_final <= Z22[13] ? Z22[24:14] + 1 : Z22[24:14];
|
| 324 |
|
|
Z23_final <= Z23[13] ? Z23[24:14] + 1 : Z23[24:14];
|
| 325 |
|
|
Z24_final <= Z24[13] ? Z24[24:14] + 1 : Z24[24:14];
|
| 326 |
|
|
Z25_final <= Z25[13] ? Z25[24:14] + 1 : Z25[24:14];
|
| 327 |
|
|
Z26_final <= Z26[13] ? Z26[24:14] + 1 : Z26[24:14];
|
| 328 |
|
|
Z27_final <= Z27[13] ? Z27[24:14] + 1 : Z27[24:14];
|
| 329 |
|
|
Z28_final <= Z28[13] ? Z28[24:14] + 1 : Z28[24:14];
|
| 330 |
|
|
Z31_final <= Z31[13] ? Z31[24:14] + 1 : Z31[24:14];
|
| 331 |
|
|
Z32_final <= Z32[13] ? Z32[24:14] + 1 : Z32[24:14];
|
| 332 |
|
|
Z33_final <= Z33[13] ? Z33[24:14] + 1 : Z33[24:14];
|
| 333 |
|
|
Z34_final <= Z34[13] ? Z34[24:14] + 1 : Z34[24:14];
|
| 334 |
|
|
Z35_final <= Z35[13] ? Z35[24:14] + 1 : Z35[24:14];
|
| 335 |
|
|
Z36_final <= Z36[13] ? Z36[24:14] + 1 : Z36[24:14];
|
| 336 |
|
|
Z37_final <= Z37[13] ? Z37[24:14] + 1 : Z37[24:14];
|
| 337 |
|
|
Z38_final <= Z38[13] ? Z38[24:14] + 1 : Z38[24:14];
|
| 338 |
|
|
Z41_final <= Z41[13] ? Z41[24:14] + 1 : Z41[24:14];
|
| 339 |
|
|
Z42_final <= Z42[13] ? Z42[24:14] + 1 : Z42[24:14];
|
| 340 |
|
|
Z43_final <= Z43[13] ? Z43[24:14] + 1 : Z43[24:14];
|
| 341 |
|
|
Z44_final <= Z44[13] ? Z44[24:14] + 1 : Z44[24:14];
|
| 342 |
|
|
Z45_final <= Z45[13] ? Z45[24:14] + 1 : Z45[24:14];
|
| 343 |
|
|
Z46_final <= Z46[13] ? Z46[24:14] + 1 : Z46[24:14];
|
| 344 |
|
|
Z47_final <= Z47[13] ? Z47[24:14] + 1 : Z47[24:14];
|
| 345 |
|
|
Z48_final <= Z48[13] ? Z48[24:14] + 1 : Z48[24:14];
|
| 346 |
|
|
Z51_final <= Z51[13] ? Z51[24:14] + 1 : Z51[24:14];
|
| 347 |
|
|
Z52_final <= Z52[13] ? Z52[24:14] + 1 : Z52[24:14];
|
| 348 |
|
|
Z53_final <= Z53[13] ? Z53[24:14] + 1 : Z53[24:14];
|
| 349 |
|
|
Z54_final <= Z54[13] ? Z54[24:14] + 1 : Z54[24:14];
|
| 350 |
|
|
Z55_final <= Z55[13] ? Z55[24:14] + 1 : Z55[24:14];
|
| 351 |
|
|
Z56_final <= Z56[13] ? Z56[24:14] + 1 : Z56[24:14];
|
| 352 |
|
|
Z57_final <= Z57[13] ? Z57[24:14] + 1 : Z57[24:14];
|
| 353 |
|
|
Z58_final <= Z58[13] ? Z58[24:14] + 1 : Z58[24:14];
|
| 354 |
|
|
Z61_final <= Z61[13] ? Z61[24:14] + 1 : Z61[24:14];
|
| 355 |
|
|
Z62_final <= Z62[13] ? Z62[24:14] + 1 : Z62[24:14];
|
| 356 |
|
|
Z63_final <= Z63[13] ? Z63[24:14] + 1 : Z63[24:14];
|
| 357 |
|
|
Z64_final <= Z64[13] ? Z64[24:14] + 1 : Z64[24:14];
|
| 358 |
|
|
Z65_final <= Z65[13] ? Z65[24:14] + 1 : Z65[24:14];
|
| 359 |
|
|
Z66_final <= Z66[13] ? Z66[24:14] + 1 : Z66[24:14];
|
| 360 |
|
|
Z67_final <= Z67[13] ? Z67[24:14] + 1 : Z67[24:14];
|
| 361 |
|
|
Z68_final <= Z68[13] ? Z68[24:14] + 1 : Z68[24:14];
|
| 362 |
|
|
Z71_final <= Z71[13] ? Z71[24:14] + 1 : Z71[24:14];
|
| 363 |
|
|
Z72_final <= Z72[13] ? Z72[24:14] + 1 : Z72[24:14];
|
| 364 |
|
|
Z73_final <= Z73[13] ? Z73[24:14] + 1 : Z73[24:14];
|
| 365 |
|
|
Z74_final <= Z74[13] ? Z74[24:14] + 1 : Z74[24:14];
|
| 366 |
|
|
Z75_final <= Z75[13] ? Z75[24:14] + 1 : Z75[24:14];
|
| 367 |
|
|
Z76_final <= Z76[13] ? Z76[24:14] + 1 : Z76[24:14];
|
| 368 |
|
|
Z77_final <= Z77[13] ? Z77[24:14] + 1 : Z77[24:14];
|
| 369 |
|
|
Z78_final <= Z78[13] ? Z78[24:14] + 1 : Z78[24:14];
|
| 370 |
|
|
Z81_final <= Z81[13] ? Z81[24:14] + 1 : Z81[24:14];
|
| 371 |
|
|
Z82_final <= Z82[13] ? Z82[24:14] + 1 : Z82[24:14];
|
| 372 |
|
|
Z83_final <= Z83[13] ? Z83[24:14] + 1 : Z83[24:14];
|
| 373 |
|
|
Z84_final <= Z84[13] ? Z84[24:14] + 1 : Z84[24:14];
|
| 374 |
|
|
Z85_final <= Z85[13] ? Z85[24:14] + 1 : Z85[24:14];
|
| 375 |
|
|
Z86_final <= Z86[13] ? Z86[24:14] + 1 : Z86[24:14];
|
| 376 |
|
|
Z87_final <= Z87[13] ? Z87[24:14] + 1 : Z87[24:14];
|
| 377 |
|
|
Z88_final <= Z88[13] ? Z88[24:14] + 1 : Z88[24:14];
|
| 378 |
|
|
end
|
| 379 |
|
|
end
|
| 380 |
|
|
|
| 381 |
|
|
// output_enable signals the next block, the quantizer, that the input data is ready
|
| 382 |
|
|
always @(posedge clk)
|
| 383 |
|
|
begin
|
| 384 |
|
|
if (rst)
|
| 385 |
|
|
output_enable <= 0;
|
| 386 |
|
|
else if (!enable_1)
|
| 387 |
|
|
output_enable <= 0;
|
| 388 |
|
|
else if (count_10 == 0 | count_of)
|
| 389 |
|
|
output_enable <= 0;
|
| 390 |
|
|
else if (count_10 & count_of == 0)
|
| 391 |
|
|
output_enable <= 1;
|
| 392 |
|
|
end
|
| 393 |
|
|
always @(posedge clk)
|
| 394 |
|
|
begin
|
| 395 |
|
|
if (rst)
|
| 396 |
|
|
Cb_temp_11 <= 0;
|
| 397 |
|
|
else if (enable)
|
| 398 |
|
|
Cb_temp_11 <= data_in * T1;
|
| 399 |
|
|
end
|
| 400 |
|
|
|
| 401 |
|
|
always @(posedge clk)
|
| 402 |
|
|
begin
|
| 403 |
|
|
if (rst)
|
| 404 |
|
|
Cb11 <= 0;
|
| 405 |
|
|
else if (count == 1 & enable == 1)
|
| 406 |
|
|
Cb11 <= Cb_temp_11;
|
| 407 |
|
|
else if (enable)
|
| 408 |
|
|
Cb11 <= Cb_temp_11 + Cb11;
|
| 409 |
|
|
end
|
| 410 |
|
|
|
| 411 |
|
|
always @(posedge clk)
|
| 412 |
|
|
begin
|
| 413 |
|
|
if (rst) begin
|
| 414 |
|
|
Cb_temp_21 <= 0;
|
| 415 |
|
|
Cb_temp_31 <= 0;
|
| 416 |
|
|
Cb_temp_41 <= 0;
|
| 417 |
|
|
Cb_temp_51 <= 0;
|
| 418 |
|
|
Cb_temp_61 <= 0;
|
| 419 |
|
|
Cb_temp_71 <= 0;
|
| 420 |
|
|
Cb_temp_81 <= 0;
|
| 421 |
|
|
end
|
| 422 |
|
|
else if (!enable_1) begin
|
| 423 |
|
|
Cb_temp_21 <= 0;
|
| 424 |
|
|
Cb_temp_31 <= 0;
|
| 425 |
|
|
Cb_temp_41 <= 0;
|
| 426 |
|
|
Cb_temp_51 <= 0;
|
| 427 |
|
|
Cb_temp_61 <= 0;
|
| 428 |
|
|
Cb_temp_71 <= 0;
|
| 429 |
|
|
Cb_temp_81 <= 0;
|
| 430 |
|
|
end
|
| 431 |
|
|
else if (enable_1) begin
|
| 432 |
|
|
Cb_temp_21 <= data_1 * Cb2_mul_input;
|
| 433 |
|
|
Cb_temp_31 <= data_1 * Cb3_mul_input;
|
| 434 |
|
|
Cb_temp_41 <= data_1 * Cb4_mul_input;
|
| 435 |
|
|
Cb_temp_51 <= data_1 * Cb5_mul_input;
|
| 436 |
|
|
Cb_temp_61 <= data_1 * Cb6_mul_input;
|
| 437 |
|
|
Cb_temp_71 <= data_1 * Cb7_mul_input;
|
| 438 |
|
|
Cb_temp_81 <= data_1 * Cb8_mul_input;
|
| 439 |
|
|
end
|
| 440 |
|
|
end
|
| 441 |
|
|
|
| 442 |
|
|
always @(posedge clk)
|
| 443 |
|
|
begin
|
| 444 |
|
|
if (rst) begin
|
| 445 |
|
|
Cb21 <= 0;
|
| 446 |
|
|
Cb31 <= 0;
|
| 447 |
|
|
Cb41 <= 0;
|
| 448 |
|
|
Cb51 <= 0;
|
| 449 |
|
|
Cb61 <= 0;
|
| 450 |
|
|
Cb71 <= 0;
|
| 451 |
|
|
Cb81 <= 0;
|
| 452 |
|
|
end
|
| 453 |
|
|
else if (!enable_1) begin
|
| 454 |
|
|
Cb21 <= 0;
|
| 455 |
|
|
Cb31 <= 0;
|
| 456 |
|
|
Cb41 <= 0;
|
| 457 |
|
|
Cb51 <= 0;
|
| 458 |
|
|
Cb61 <= 0;
|
| 459 |
|
|
Cb71 <= 0;
|
| 460 |
|
|
Cb81 <= 0;
|
| 461 |
|
|
end
|
| 462 |
|
|
else if (enable_1) begin
|
| 463 |
|
|
Cb21 <= Cb_temp_21 + Cb21;
|
| 464 |
|
|
Cb31 <= Cb_temp_31 + Cb31;
|
| 465 |
|
|
Cb41 <= Cb_temp_41 + Cb41;
|
| 466 |
|
|
Cb51 <= Cb_temp_51 + Cb51;
|
| 467 |
|
|
Cb61 <= Cb_temp_61 + Cb61;
|
| 468 |
|
|
Cb71 <= Cb_temp_71 + Cb71;
|
| 469 |
|
|
Cb81 <= Cb_temp_81 + Cb81;
|
| 470 |
|
|
end
|
| 471 |
|
|
end
|
| 472 |
|
|
|
| 473 |
|
|
always @(posedge clk)
|
| 474 |
|
|
begin
|
| 475 |
|
|
if (rst) begin
|
| 476 |
|
|
count <= 0; count_3 <= 0; count_4 <= 0; count_5 <= 0;
|
| 477 |
|
|
count_6 <= 0; count_7 <= 0; count_8 <= 0; count_9 <= 0;
|
| 478 |
|
|
count_10 <= 0;
|
| 479 |
|
|
end
|
| 480 |
|
|
else if (!enable) begin
|
| 481 |
|
|
count <= 0; count_3 <= 0; count_4 <= 0; count_5 <= 0;
|
| 482 |
|
|
count_6 <= 0; count_7 <= 0; count_8 <= 0; count_9 <= 0;
|
| 483 |
|
|
count_10 <= 0;
|
| 484 |
|
|
end
|
| 485 |
|
|
else if (enable) begin
|
| 486 |
|
|
count <= count + 1; count_3 <= count_1; count_4 <= count_3;
|
| 487 |
|
|
count_5 <= count_4; count_6 <= count_5; count_7 <= count_6;
|
| 488 |
|
|
count_8 <= count_7; count_9 <= count_8; count_10 <= count_9;
|
| 489 |
|
|
end
|
| 490 |
|
|
end
|
| 491 |
|
|
|
| 492 |
|
|
always @(posedge clk)
|
| 493 |
|
|
begin
|
| 494 |
|
|
if (rst) begin
|
| 495 |
|
|
count_1 <= 0;
|
| 496 |
|
|
end
|
| 497 |
|
|
else if (count != 7 | !enable) begin
|
| 498 |
|
|
count_1 <= 0;
|
| 499 |
|
|
end
|
| 500 |
|
|
else if (count == 7) begin
|
| 501 |
|
|
count_1 <= 1;
|
| 502 |
|
|
end
|
| 503 |
|
|
end
|
| 504 |
|
|
|
| 505 |
|
|
always @(posedge clk)
|
| 506 |
|
|
begin
|
| 507 |
|
|
if (rst) begin
|
| 508 |
|
|
count_of <= 0;
|
| 509 |
|
|
count_of_copy <= 0;
|
| 510 |
|
|
end
|
| 511 |
|
|
else if (!enable) begin
|
| 512 |
|
|
count_of <= 0;
|
| 513 |
|
|
count_of_copy <= 0;
|
| 514 |
|
|
end
|
| 515 |
|
|
else if (count_1 == 1) begin
|
| 516 |
|
|
count_of <= count_of + 1;
|
| 517 |
|
|
count_of_copy <= count_of_copy + 1;
|
| 518 |
|
|
end
|
| 519 |
|
|
end
|
| 520 |
|
|
|
| 521 |
|
|
always @(posedge clk)
|
| 522 |
|
|
begin
|
| 523 |
|
|
if (rst) begin
|
| 524 |
|
|
Cb11_final <= 0;
|
| 525 |
|
|
end
|
| 526 |
|
|
else if (count_3 & enable_1) begin
|
| 527 |
|
|
Cb11_final <= Cb11 - 25'd5932032;
|
| 528 |
|
|
/* The Cb values weren't centered on 0 before doing the DCT
|
| 529 |
|
|
128 needs to be subtracted from each Cb value before, or in this
|
| 530 |
|
|
case, 362 is subtracted from the total, because this is the
|
| 531 |
|
|
total obtained by subtracting 128 from each element
|
| 532 |
|
|
and then multiplying by the weight
|
| 533 |
|
|
assigned by the DCT matrix : 128*8*5793 = 5932032
|
| 534 |
|
|
This is only needed for the first row, the values in the rest of
|
| 535 |
|
|
the rows add up to 0 */
|
| 536 |
|
|
end
|
| 537 |
|
|
end
|
| 538 |
|
|
|
| 539 |
|
|
|
| 540 |
|
|
always @(posedge clk)
|
| 541 |
|
|
begin
|
| 542 |
|
|
if (rst) begin
|
| 543 |
|
|
Cb21_final <= 0; Cb21_final_prev <= 0;
|
| 544 |
|
|
Cb31_final <= 0; Cb31_final_prev <= 0;
|
| 545 |
|
|
Cb41_final <= 0; Cb41_final_prev <= 0;
|
| 546 |
|
|
Cb51_final <= 0; Cb51_final_prev <= 0;
|
| 547 |
|
|
Cb61_final <= 0; Cb61_final_prev <= 0;
|
| 548 |
|
|
Cb71_final <= 0; Cb71_final_prev <= 0;
|
| 549 |
|
|
Cb81_final <= 0; Cb81_final_prev <= 0;
|
| 550 |
|
|
end
|
| 551 |
|
|
else if (!enable_1) begin
|
| 552 |
|
|
Cb21_final <= 0; Cb21_final_prev <= 0;
|
| 553 |
|
|
Cb31_final <= 0; Cb31_final_prev <= 0;
|
| 554 |
|
|
Cb41_final <= 0; Cb41_final_prev <= 0;
|
| 555 |
|
|
Cb51_final <= 0; Cb51_final_prev <= 0;
|
| 556 |
|
|
Cb61_final <= 0; Cb61_final_prev <= 0;
|
| 557 |
|
|
Cb71_final <= 0; Cb71_final_prev <= 0;
|
| 558 |
|
|
Cb81_final <= 0; Cb81_final_prev <= 0;
|
| 559 |
|
|
end
|
| 560 |
|
|
else if (count_4 & enable_1) begin
|
| 561 |
|
|
Cb21_final <= Cb21; Cb21_final_prev <= Cb21_final;
|
| 562 |
|
|
Cb31_final <= Cb31; Cb31_final_prev <= Cb31_final;
|
| 563 |
|
|
Cb41_final <= Cb41; Cb41_final_prev <= Cb41_final;
|
| 564 |
|
|
Cb51_final <= Cb51; Cb51_final_prev <= Cb51_final;
|
| 565 |
|
|
Cb61_final <= Cb61; Cb61_final_prev <= Cb61_final;
|
| 566 |
|
|
Cb71_final <= Cb71; Cb71_final_prev <= Cb71_final;
|
| 567 |
|
|
Cb81_final <= Cb81; Cb81_final_prev <= Cb81_final;
|
| 568 |
|
|
end
|
| 569 |
|
|
end
|
| 570 |
|
|
|
| 571 |
|
|
always @(posedge clk)
|
| 572 |
|
|
begin
|
| 573 |
|
|
if (rst) begin
|
| 574 |
|
|
Cb21_final_diff <= 0; Cb31_final_diff <= 0;
|
| 575 |
|
|
Cb41_final_diff <= 0; Cb51_final_diff <= 0;
|
| 576 |
|
|
Cb61_final_diff <= 0; Cb71_final_diff <= 0;
|
| 577 |
|
|
Cb81_final_diff <= 0;
|
| 578 |
|
|
end
|
| 579 |
|
|
else if (count_5 & enable_1) begin
|
| 580 |
|
|
Cb21_final_diff <= Cb21_final - Cb21_final_prev;
|
| 581 |
|
|
Cb31_final_diff <= Cb31_final - Cb31_final_prev;
|
| 582 |
|
|
Cb41_final_diff <= Cb41_final - Cb41_final_prev;
|
| 583 |
|
|
Cb51_final_diff <= Cb51_final - Cb51_final_prev;
|
| 584 |
|
|
Cb61_final_diff <= Cb61_final - Cb61_final_prev;
|
| 585 |
|
|
Cb71_final_diff <= Cb71_final - Cb71_final_prev;
|
| 586 |
|
|
Cb81_final_diff <= Cb81_final - Cb81_final_prev;
|
| 587 |
|
|
end
|
| 588 |
|
|
end
|
| 589 |
|
|
|
| 590 |
|
|
always @(posedge clk)
|
| 591 |
|
|
begin
|
| 592 |
|
|
case (count)
|
| 593 |
|
|
3'b000: Cb2_mul_input <= T21;
|
| 594 |
|
|
3'b001: Cb2_mul_input <= T22;
|
| 595 |
|
|
3'b010: Cb2_mul_input <= T23;
|
| 596 |
|
|
3'b011: Cb2_mul_input <= T24;
|
| 597 |
|
|
3'b100: Cb2_mul_input <= T25;
|
| 598 |
|
|
3'b101: Cb2_mul_input <= T26;
|
| 599 |
|
|
3'b110: Cb2_mul_input <= T27;
|
| 600 |
|
|
3'b111: Cb2_mul_input <= T28;
|
| 601 |
|
|
endcase
|
| 602 |
|
|
end
|
| 603 |
|
|
|
| 604 |
|
|
always @(posedge clk)
|
| 605 |
|
|
begin
|
| 606 |
|
|
case (count)
|
| 607 |
|
|
3'b000: Cb3_mul_input <= T31;
|
| 608 |
|
|
3'b001: Cb3_mul_input <= T32;
|
| 609 |
|
|
3'b010: Cb3_mul_input <= T33;
|
| 610 |
|
|
3'b011: Cb3_mul_input <= T34;
|
| 611 |
|
|
3'b100: Cb3_mul_input <= T34;
|
| 612 |
|
|
3'b101: Cb3_mul_input <= T33;
|
| 613 |
|
|
3'b110: Cb3_mul_input <= T32;
|
| 614 |
|
|
3'b111: Cb3_mul_input <= T31;
|
| 615 |
|
|
endcase
|
| 616 |
|
|
end
|
| 617 |
|
|
|
| 618 |
|
|
always @(posedge clk)
|
| 619 |
|
|
begin
|
| 620 |
|
|
case (count)
|
| 621 |
|
|
3'b000: Cb4_mul_input <= T22;
|
| 622 |
|
|
3'b001: Cb4_mul_input <= T25;
|
| 623 |
|
|
3'b010: Cb4_mul_input <= T28;
|
| 624 |
|
|
3'b011: Cb4_mul_input <= T26;
|
| 625 |
|
|
3'b100: Cb4_mul_input <= T23;
|
| 626 |
|
|
3'b101: Cb4_mul_input <= T21;
|
| 627 |
|
|
3'b110: Cb4_mul_input <= T24;
|
| 628 |
|
|
3'b111: Cb4_mul_input <= T27;
|
| 629 |
|
|
endcase
|
| 630 |
|
|
end
|
| 631 |
|
|
|
| 632 |
|
|
always @(posedge clk)
|
| 633 |
|
|
begin
|
| 634 |
|
|
case (count)
|
| 635 |
|
|
3'b000: Cb5_mul_input <= T1;
|
| 636 |
|
|
3'b001: Cb5_mul_input <= T52;
|
| 637 |
|
|
3'b010: Cb5_mul_input <= T52;
|
| 638 |
|
|
3'b011: Cb5_mul_input <= T1;
|
| 639 |
|
|
3'b100: Cb5_mul_input <= T1;
|
| 640 |
|
|
3'b101: Cb5_mul_input <= T52;
|
| 641 |
|
|
3'b110: Cb5_mul_input <= T52;
|
| 642 |
|
|
3'b111: Cb5_mul_input <= T1;
|
| 643 |
|
|
endcase
|
| 644 |
|
|
end
|
| 645 |
|
|
|
| 646 |
|
|
always @(posedge clk)
|
| 647 |
|
|
begin
|
| 648 |
|
|
case (count)
|
| 649 |
|
|
3'b000: Cb6_mul_input <= T23;
|
| 650 |
|
|
3'b001: Cb6_mul_input <= T28;
|
| 651 |
|
|
3'b010: Cb6_mul_input <= T24;
|
| 652 |
|
|
3'b011: Cb6_mul_input <= T22;
|
| 653 |
|
|
3'b100: Cb6_mul_input <= T27;
|
| 654 |
|
|
3'b101: Cb6_mul_input <= T25;
|
| 655 |
|
|
3'b110: Cb6_mul_input <= T21;
|
| 656 |
|
|
3'b111: Cb6_mul_input <= T26;
|
| 657 |
|
|
endcase
|
| 658 |
|
|
end
|
| 659 |
|
|
|
| 660 |
|
|
always @(posedge clk)
|
| 661 |
|
|
begin
|
| 662 |
|
|
case (count)
|
| 663 |
|
|
3'b000: Cb7_mul_input <= T32;
|
| 664 |
|
|
3'b001: Cb7_mul_input <= T34;
|
| 665 |
|
|
3'b010: Cb7_mul_input <= T31;
|
| 666 |
|
|
3'b011: Cb7_mul_input <= T33;
|
| 667 |
|
|
3'b100: Cb7_mul_input <= T33;
|
| 668 |
|
|
3'b101: Cb7_mul_input <= T31;
|
| 669 |
|
|
3'b110: Cb7_mul_input <= T34;
|
| 670 |
|
|
3'b111: Cb7_mul_input <= T32;
|
| 671 |
|
|
endcase
|
| 672 |
|
|
end
|
| 673 |
|
|
|
| 674 |
|
|
always @(posedge clk)
|
| 675 |
|
|
begin
|
| 676 |
|
|
case (count)
|
| 677 |
|
|
3'b000: Cb8_mul_input <= T24;
|
| 678 |
|
|
3'b001: Cb8_mul_input <= T26;
|
| 679 |
|
|
3'b010: Cb8_mul_input <= T22;
|
| 680 |
|
|
3'b011: Cb8_mul_input <= T28;
|
| 681 |
|
|
3'b100: Cb8_mul_input <= T21;
|
| 682 |
|
|
3'b101: Cb8_mul_input <= T27;
|
| 683 |
|
|
3'b110: Cb8_mul_input <= T23;
|
| 684 |
|
|
3'b111: Cb8_mul_input <= T25;
|
| 685 |
|
|
endcase
|
| 686 |
|
|
end
|
| 687 |
|
|
|
| 688 |
|
|
// Inverse DCT matrix entries
|
| 689 |
|
|
always @(posedge clk)
|
| 690 |
|
|
begin
|
| 691 |
|
|
case (count_of_copy)
|
| 692 |
|
|
3'b000: Ti2_mul_input <= Ti28;
|
| 693 |
|
|
3'b001: Ti2_mul_input <= Ti21;
|
| 694 |
|
|
3'b010: Ti2_mul_input <= Ti22;
|
| 695 |
|
|
3'b011: Ti2_mul_input <= Ti23;
|
| 696 |
|
|
3'b100: Ti2_mul_input <= Ti24;
|
| 697 |
|
|
3'b101: Ti2_mul_input <= Ti25;
|
| 698 |
|
|
3'b110: Ti2_mul_input <= Ti26;
|
| 699 |
|
|
3'b111: Ti2_mul_input <= Ti27;
|
| 700 |
|
|
endcase
|
| 701 |
|
|
end
|
| 702 |
|
|
|
| 703 |
|
|
always @(posedge clk)
|
| 704 |
|
|
begin
|
| 705 |
|
|
case (count_of_copy)
|
| 706 |
|
|
3'b000: Ti3_mul_input <= Ti31;
|
| 707 |
|
|
3'b001: Ti3_mul_input <= Ti31;
|
| 708 |
|
|
3'b010: Ti3_mul_input <= Ti32;
|
| 709 |
|
|
3'b011: Ti3_mul_input <= Ti33;
|
| 710 |
|
|
3'b100: Ti3_mul_input <= Ti34;
|
| 711 |
|
|
3'b101: Ti3_mul_input <= Ti34;
|
| 712 |
|
|
3'b110: Ti3_mul_input <= Ti33;
|
| 713 |
|
|
3'b111: Ti3_mul_input <= Ti32;
|
| 714 |
|
|
endcase
|
| 715 |
|
|
end
|
| 716 |
|
|
|
| 717 |
|
|
always @(posedge clk)
|
| 718 |
|
|
begin
|
| 719 |
|
|
case (count_of_copy)
|
| 720 |
|
|
3'b000: Ti4_mul_input <= Ti27;
|
| 721 |
|
|
3'b001: Ti4_mul_input <= Ti22;
|
| 722 |
|
|
3'b010: Ti4_mul_input <= Ti25;
|
| 723 |
|
|
3'b011: Ti4_mul_input <= Ti28;
|
| 724 |
|
|
3'b100: Ti4_mul_input <= Ti26;
|
| 725 |
|
|
3'b101: Ti4_mul_input <= Ti23;
|
| 726 |
|
|
3'b110: Ti4_mul_input <= Ti21;
|
| 727 |
|
|
3'b111: Ti4_mul_input <= Ti24;
|
| 728 |
|
|
endcase
|
| 729 |
|
|
end
|
| 730 |
|
|
|
| 731 |
|
|
always @(posedge clk)
|
| 732 |
|
|
begin
|
| 733 |
|
|
case (count_of_copy)
|
| 734 |
|
|
3'b000: Ti5_mul_input <= Ti1;
|
| 735 |
|
|
3'b001: Ti5_mul_input <= Ti1;
|
| 736 |
|
|
3'b010: Ti5_mul_input <= Ti52;
|
| 737 |
|
|
3'b011: Ti5_mul_input <= Ti52;
|
| 738 |
|
|
3'b100: Ti5_mul_input <= Ti1;
|
| 739 |
|
|
3'b101: Ti5_mul_input <= Ti1;
|
| 740 |
|
|
3'b110: Ti5_mul_input <= Ti52;
|
| 741 |
|
|
3'b111: Ti5_mul_input <= Ti52;
|
| 742 |
|
|
endcase
|
| 743 |
|
|
end
|
| 744 |
|
|
|
| 745 |
|
|
always @(posedge clk)
|
| 746 |
|
|
begin
|
| 747 |
|
|
case (count_of_copy)
|
| 748 |
|
|
3'b000: Ti6_mul_input <= Ti26;
|
| 749 |
|
|
3'b001: Ti6_mul_input <= Ti23;
|
| 750 |
|
|
3'b010: Ti6_mul_input <= Ti28;
|
| 751 |
|
|
3'b011: Ti6_mul_input <= Ti24;
|
| 752 |
|
|
3'b100: Ti6_mul_input <= Ti22;
|
| 753 |
|
|
3'b101: Ti6_mul_input <= Ti27;
|
| 754 |
|
|
3'b110: Ti6_mul_input <= Ti25;
|
| 755 |
|
|
3'b111: Ti6_mul_input <= Ti21;
|
| 756 |
|
|
endcase
|
| 757 |
|
|
end
|
| 758 |
|
|
|
| 759 |
|
|
always @(posedge clk)
|
| 760 |
|
|
begin
|
| 761 |
|
|
case (count_of_copy)
|
| 762 |
|
|
3'b000: Ti7_mul_input <= Ti32;
|
| 763 |
|
|
3'b001: Ti7_mul_input <= Ti32;
|
| 764 |
|
|
3'b010: Ti7_mul_input <= Ti34;
|
| 765 |
|
|
3'b011: Ti7_mul_input <= Ti31;
|
| 766 |
|
|
3'b100: Ti7_mul_input <= Ti33;
|
| 767 |
|
|
3'b101: Ti7_mul_input <= Ti33;
|
| 768 |
|
|
3'b110: Ti7_mul_input <= Ti31;
|
| 769 |
|
|
3'b111: Ti7_mul_input <= Ti34;
|
| 770 |
|
|
endcase
|
| 771 |
|
|
end
|
| 772 |
|
|
|
| 773 |
|
|
always @(posedge clk)
|
| 774 |
|
|
begin
|
| 775 |
|
|
case (count_of_copy)
|
| 776 |
|
|
3'b000: Ti8_mul_input <= Ti25;
|
| 777 |
|
|
3'b001: Ti8_mul_input <= Ti24;
|
| 778 |
|
|
3'b010: Ti8_mul_input <= Ti26;
|
| 779 |
|
|
3'b011: Ti8_mul_input <= Ti22;
|
| 780 |
|
|
3'b100: Ti8_mul_input <= Ti28;
|
| 781 |
|
|
3'b101: Ti8_mul_input <= Ti21;
|
| 782 |
|
|
3'b110: Ti8_mul_input <= Ti27;
|
| 783 |
|
|
3'b111: Ti8_mul_input <= Ti23;
|
| 784 |
|
|
endcase
|
| 785 |
|
|
end
|
| 786 |
|
|
|
| 787 |
|
|
// Rounding stage
|
| 788 |
|
|
always @(posedge clk)
|
| 789 |
|
|
begin
|
| 790 |
|
|
if (rst) begin
|
| 791 |
|
|
data_1 <= 0;
|
| 792 |
|
|
Cb11_final_1 <= 0; Cb21_final_1 <= 0; Cb31_final_1 <= 0; Cb41_final_1 <= 0;
|
| 793 |
|
|
Cb51_final_1 <= 0; Cb61_final_1 <= 0; Cb71_final_1 <= 0; Cb81_final_1 <= 0;
|
| 794 |
|
|
Cb11_final_2 <= 0; Cb21_final_2 <= 0; Cb31_final_2 <= 0; Cb41_final_2 <= 0;
|
| 795 |
|
|
Cb51_final_2 <= 0; Cb61_final_2 <= 0; Cb71_final_2 <= 0; Cb81_final_2 <= 0;
|
| 796 |
|
|
Cb11_final_3 <= 0; Cb11_final_4 <= 0;
|
| 797 |
|
|
end
|
| 798 |
|
|
else if (enable) begin
|
| 799 |
|
|
data_1 <= data_in;
|
| 800 |
|
|
Cb11_final_1 <= Cb11_final[13] ? Cb11_final[24:14] + 1 : Cb11_final[24:14];
|
| 801 |
|
|
Cb11_final_2[31:11] <= Cb11_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 802 |
|
|
Cb11_final_2[10:0] <= Cb11_final_1;
|
| 803 |
|
|
// Need to sign extend Cb11_final_1 and the other registers to store a negative
|
| 804 |
|
|
// number as a twos complement number. If you don't sign extend, then a negative number
|
| 805 |
|
|
// will be stored incorrectly as a positive number. For example, -215 would be stored
|
| 806 |
|
|
// as 1833 without sign extending
|
| 807 |
|
|
Cb11_final_3 <= Cb11_final_2;
|
| 808 |
|
|
Cb11_final_4 <= Cb11_final_3;
|
| 809 |
|
|
Cb21_final_1 <= Cb21_final_diff[13] ? Cb21_final_diff[24:14] + 1 : Cb21_final_diff[24:14];
|
| 810 |
|
|
Cb21_final_2[31:11] <= Cb21_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 811 |
|
|
Cb21_final_2[10:0] <= Cb21_final_1;
|
| 812 |
|
|
Cb31_final_1 <= Cb31_final_diff[13] ? Cb31_final_diff[24:14] + 1 : Cb31_final_diff[24:14];
|
| 813 |
|
|
Cb31_final_2[31:11] <= Cb31_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 814 |
|
|
Cb31_final_2[10:0] <= Cb31_final_1;
|
| 815 |
|
|
Cb41_final_1 <= Cb41_final_diff[13] ? Cb41_final_diff[24:14] + 1 : Cb41_final_diff[24:14];
|
| 816 |
|
|
Cb41_final_2[31:11] <= Cb41_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 817 |
|
|
Cb41_final_2[10:0] <= Cb41_final_1;
|
| 818 |
|
|
Cb51_final_1 <= Cb51_final_diff[13] ? Cb51_final_diff[24:14] + 1 : Cb51_final_diff[24:14];
|
| 819 |
|
|
Cb51_final_2[31:11] <= Cb51_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 820 |
|
|
Cb51_final_2[10:0] <= Cb51_final_1;
|
| 821 |
|
|
Cb61_final_1 <= Cb61_final_diff[13] ? Cb61_final_diff[24:14] + 1 : Cb61_final_diff[24:14];
|
| 822 |
|
|
Cb61_final_2[31:11] <= Cb61_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 823 |
|
|
Cb61_final_2[10:0] <= Cb61_final_1;
|
| 824 |
|
|
Cb71_final_1 <= Cb71_final_diff[13] ? Cb71_final_diff[24:14] + 1 : Cb71_final_diff[24:14];
|
| 825 |
|
|
Cb71_final_2[31:11] <= Cb71_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 826 |
|
|
Cb71_final_2[10:0] <= Cb71_final_1;
|
| 827 |
|
|
Cb81_final_1 <= Cb81_final_diff[13] ? Cb81_final_diff[24:14] + 1 : Cb81_final_diff[24:14];
|
| 828 |
|
|
Cb81_final_2[31:11] <= Cb81_final_1[10] ? 21'b111111111111111111111 : 21'b000000000000000000000;
|
| 829 |
|
|
Cb81_final_2[10:0] <= Cb81_final_1;
|
| 830 |
|
|
// The bit in place 13 is the fraction part, for rounding purposes
|
| 831 |
|
|
// if it is 1, then you need to add 1 to the bits in 22-14,
|
| 832 |
|
|
// if bit 13 is 0, then the bits in 22-14 won't change
|
| 833 |
|
|
end
|
| 834 |
|
|
end
|
| 835 |
|
|
|
| 836 |
|
|
always @(posedge clk)
|
| 837 |
|
|
begin
|
| 838 |
|
|
if (rst) begin
|
| 839 |
|
|
enable_1 <= 0;
|
| 840 |
|
|
end
|
| 841 |
|
|
else begin
|
| 842 |
|
|
enable_1 <= enable;
|
| 843 |
|
|
end
|
| 844 |
|
|
end
|
| 845 |
|
|
|
| 846 |
|
|
endmodule
|
