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/*

 * vlc_tables.v

 *

 * Copyright (c) 2007 Koen De Vleeschauwer.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/*

 * vlc_tables - Variable Length Code Tables. Tables B-1 to B-5 and B-9 to B-15 from ISO/IEC 13818-2.

 */

/*

  Function macroblock_address_increment_dec translates

  macroblock address increment vlc code to {codelength, codeword} pairs

  as in table B-1 from ISO/IEC 13818-2.

  First 4 bits of output are` code length, next 5 bits of output are code value.

*/

function [10:0]macroblock_address_increment_dec;

  input [10:0]codeword;

  begin

    casex(codeword)

      11'b0000_0100_011: macroblock_address_increment_dec = {4'd11, 6'd22, 1'b0};

      11'b0000_0100_010: macroblock_address_increment_dec = {4'd11, 6'd23, 1'b0};

      11'b0000_0100_001: macroblock_address_increment_dec = {4'd11, 6'd24, 1'b0};

      11'b0000_0100_000: macroblock_address_increment_dec = {4'd11, 6'd25, 1'b0};

      11'b0000_0011_111: macroblock_address_increment_dec = {4'd11, 6'd26, 1'b0};

      11'b0000_0011_110: macroblock_address_increment_dec = {4'd11, 6'd27, 1'b0};

      11'b0000_0011_101: macroblock_address_increment_dec = {4'd11, 6'd28, 1'b0};

      11'b0000_0011_100: macroblock_address_increment_dec = {4'd11, 6'd29, 1'b0};

      11'b0000_0011_011: macroblock_address_increment_dec = {4'd11, 6'd30, 1'b0};

      11'b0000_0011_010: macroblock_address_increment_dec = {4'd11, 6'd31, 1'b0};

      11'b0000_0011_001: macroblock_address_increment_dec = {4'd11, 6'd32, 1'b0};

      11'b0000_0011_000: macroblock_address_increment_dec = {4'd11, 6'd33, 1'b0};

      11'b0000_0001_000: macroblock_address_increment_dec = {4'd11, 6'd33, 1'b1}; // macroblock_escape

      11'b0000_0101_11x: macroblock_address_increment_dec = {4'd10, 6'd16, 1'b0};

      11'b0000_0101_10x: macroblock_address_increment_dec = {4'd10, 6'd17, 1'b0};

      11'b0000_0101_01x: macroblock_address_increment_dec = {4'd10, 6'd18, 1'b0};

      11'b0000_0101_00x: macroblock_address_increment_dec = {4'd10, 6'd19, 1'b0};

      11'b0000_0100_11x: macroblock_address_increment_dec = {4'd10, 6'd20, 1'b0};

      11'b0000_0100_10x: macroblock_address_increment_dec = {4'd10, 6'd21, 1'b0};

      11'b0000_1011_xxx: macroblock_address_increment_dec = {4'd8,  6'd10, 1'b0};

      11'b0000_1010_xxx: macroblock_address_increment_dec = {4'd8,  6'd11, 1'b0};

      11'b0000_1001_xxx: macroblock_address_increment_dec = {4'd8,  6'd12, 1'b0};

      11'b0000_1000_xxx: macroblock_address_increment_dec = {4'd8,  6'd13, 1'b0};

      11'b0000_0111_xxx: macroblock_address_increment_dec = {4'd8,  6'd14, 1'b0};

      11'b0000_0110_xxx: macroblock_address_increment_dec = {4'd8,  6'd15, 1'b0};

      11'b0000_111x_xxx: macroblock_address_increment_dec = {4'd7,  6'd8,  1'b0};

      11'b0000_110x_xxx: macroblock_address_increment_dec = {4'd7,  6'd9,  1'b0};

      11'b0001_1xxx_xxx: macroblock_address_increment_dec = {4'd5,  6'd6,  1'b0};

      11'b0001_0xxx_xxx: macroblock_address_increment_dec = {4'd5,  6'd7,  1'b0};

      11'b0011_xxxx_xxx: macroblock_address_increment_dec = {4'd4,  6'd4,  1'b0};

      11'b0010_xxxx_xxx: macroblock_address_increment_dec = {4'd4,  6'd5,  1'b0};

      11'b011x_xxxx_xxx: macroblock_address_increment_dec = {4'd3,  6'd2,  1'b0};

      11'b010x_xxxx_xxx: macroblock_address_increment_dec = {4'd3,  6'd3,  1'b0};

      11'b1xxx_xxxx_xxx: macroblock_address_increment_dec = {4'd1,  6'd1,  1'b0};

      default            macroblock_address_increment_dec = {4'd0,  6'd0,  1'b0}; // Error

    endcase

  end

endfunction

/*

  Function macroblock_type_dec translates

  macroblock type vlc code to {codelength, codeword} pairs

  in tables B-2 to B-5 from ISO/IEC 13818-2, as selected by picture_coding_type.

  I don't do scalability, hence scalable_mode and tables B-6 to B-8 are not used.

  First 4 bits of output are code length, next 6 bits of output are code value.

  Typical use:

  {next_shift[3:0], macroblock_quant, macroblock_motion_forward, macroblock_motion_backward,

   macroblock_pattern, macroblock_intra, spatial_temporal_weight_code_flag} =

   macroblock_type_dec(.picture_coding_type(picture_coding_type), .codeword(codeword));

*/

function [9:0]macroblock_type_dec;

  input [5:0]codeword;

  input [2:0]picture_coding_type;

  begin

    casex(picture_coding_type)

      3'b001: // intra-coded (I)

        casex(codeword)

          6'b01xx_xx: macroblock_type_dec = {4'd2,  6'b100010};

          6'b1xxx_xx: macroblock_type_dec = {4'd1,  6'b000010};

          default     macroblock_type_dec = {4'd0,  6'b111111}; // Error

        endcase

      3'b010: // predictive-coded (P)

        casex(codeword)

          6'b0000_01: macroblock_type_dec = {4'd6,  6'b100010};

          6'b0001_1x: macroblock_type_dec = {4'd5,  6'b000010};

          6'b0001_0x: macroblock_type_dec = {4'd5,  6'b110100};

          6'b0000_1x: macroblock_type_dec = {4'd5,  6'b100100};

          6'b001x_xx: macroblock_type_dec = {4'd3,  6'b010000};

          6'b01xx_xx: macroblock_type_dec = {4'd2,  6'b000100};

          6'b1xxx_xx: macroblock_type_dec = {4'd1,  6'b010100};

          default     macroblock_type_dec = {4'd0,  6'b111111}; // Error

        endcase

      3'b011: // bidirectionally-predictive-coded (B)

        casex(codeword)

          6'b0000_11: macroblock_type_dec = {4'd6,  6'b110100};

          6'b0000_10: macroblock_type_dec = {4'd6,  6'b101100};

          6'b0000_01: macroblock_type_dec = {4'd6,  6'b100010};

          6'b0001_1x: macroblock_type_dec = {4'd5,  6'b000010};

          6'b0001_0x: macroblock_type_dec = {4'd5,  6'b111100};

          6'b0010_xx: macroblock_type_dec = {4'd4,  6'b010000};

          6'b0011_xx: macroblock_type_dec = {4'd4,  6'b010100};

          6'b010x_xx: macroblock_type_dec = {4'd3,  6'b001000};

          6'b011x_xx: macroblock_type_dec = {4'd3,  6'b001100};

          6'b10xx_xx: macroblock_type_dec = {4'd2,  6'b011000};

          6'b11xx_xx: macroblock_type_dec = {4'd2,  6'b011100};

          default     macroblock_type_dec = {4'd0,  6'b111111}; // Error

        endcase

      default // error

                      macroblock_type_dec = {4'd0,  6'b111111}; // Error

    endcase

  end

endfunction

/*

  Function coded_block_pattern_dec translates

  coded block pattern vlc code to {codelength, codeword} pairs

  as in table B-9 from ISO/IEC 13818-2.

  First 4 bits of output are` code length, next 6 bits of output are code value.

*/

function [9:0]coded_block_pattern_dec;

  input [8:0]codeword;

  begin

    casex(codeword)

      9'b0000_0011_1: coded_block_pattern_dec = {4'd9,  6'd31};

      9'b0000_0011_0: coded_block_pattern_dec = {4'd9,  6'd47};

      9'b0000_0010_1: coded_block_pattern_dec = {4'd9,  6'd55};

      9'b0000_0010_0: coded_block_pattern_dec = {4'd9,  6'd59};

      9'b0000_0001_1: coded_block_pattern_dec = {4'd9,  6'd27};

      9'b0000_0001_0: coded_block_pattern_dec = {4'd9,  6'd39};

      9'b0000_0000_1: coded_block_pattern_dec = {4'd9,  6'd0};

      9'b0001_1111_x: coded_block_pattern_dec = {4'd8,  6'd7};

      9'b0001_1110_x: coded_block_pattern_dec = {4'd8,  6'd11};

      9'b0001_1101_x: coded_block_pattern_dec = {4'd8,  6'd19};

      9'b0001_1100_x: coded_block_pattern_dec = {4'd8,  6'd35};

      9'b0001_1011_x: coded_block_pattern_dec = {4'd8,  6'd13};

      9'b0001_1010_x: coded_block_pattern_dec = {4'd8,  6'd49};

      9'b0001_1001_x: coded_block_pattern_dec = {4'd8,  6'd21};

      9'b0001_1000_x: coded_block_pattern_dec = {4'd8,  6'd41};

      9'b0001_0111_x: coded_block_pattern_dec = {4'd8,  6'd14};

      9'b0001_0110_x: coded_block_pattern_dec = {4'd8,  6'd50};

      9'b0001_0101_x: coded_block_pattern_dec = {4'd8,  6'd22};

      9'b0001_0100_x: coded_block_pattern_dec = {4'd8,  6'd42};

      9'b0001_0011_x: coded_block_pattern_dec = {4'd8,  6'd15};

      9'b0001_0010_x: coded_block_pattern_dec = {4'd8,  6'd51};

      9'b0001_0001_x: coded_block_pattern_dec = {4'd8,  6'd23};

      9'b0001_0000_x: coded_block_pattern_dec = {4'd8,  6'd43};

      9'b0000_1111_x: coded_block_pattern_dec = {4'd8,  6'd25};

      9'b0000_1110_x: coded_block_pattern_dec = {4'd8,  6'd37};

      9'b0000_1101_x: coded_block_pattern_dec = {4'd8,  6'd26};

      9'b0000_1100_x: coded_block_pattern_dec = {4'd8,  6'd38};

      9'b0000_1011_x: coded_block_pattern_dec = {4'd8,  6'd29};

      9'b0000_1010_x: coded_block_pattern_dec = {4'd8,  6'd45};

      9'b0000_1001_x: coded_block_pattern_dec = {4'd8,  6'd53};

      9'b0000_1000_x: coded_block_pattern_dec = {4'd8,  6'd57};

      9'b0000_0111_x: coded_block_pattern_dec = {4'd8,  6'd30};

      9'b0000_0110_x: coded_block_pattern_dec = {4'd8,  6'd46};

      9'b0000_0101_x: coded_block_pattern_dec = {4'd8,  6'd54};

      9'b0000_0100_x: coded_block_pattern_dec = {4'd8,  6'd58};

      9'b0010_111x_x: coded_block_pattern_dec = {4'd7,  6'd5};

      9'b0010_110x_x: coded_block_pattern_dec = {4'd7,  6'd9};

      9'b0010_101x_x: coded_block_pattern_dec = {4'd7,  6'd17};

      9'b0010_100x_x: coded_block_pattern_dec = {4'd7,  6'd33};

      9'b0010_011x_x: coded_block_pattern_dec = {4'd7,  6'd6};

      9'b0010_010x_x: coded_block_pattern_dec = {4'd7,  6'd10};

      9'b0010_001x_x: coded_block_pattern_dec = {4'd7,  6'd18};

      9'b0010_000x_x: coded_block_pattern_dec = {4'd7,  6'd34};

      9'b0011_11xx_x: coded_block_pattern_dec = {4'd6,  6'd24};

      9'b0011_10xx_x: coded_block_pattern_dec = {4'd6,  6'd36};

      9'b0011_01xx_x: coded_block_pattern_dec = {4'd6,  6'd3};

      9'b0011_00xx_x: coded_block_pattern_dec = {4'd6,  6'd63};

      9'b1001_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd12};

      9'b1001_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd48};

      9'b1000_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd20};

      9'b1000_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd40};

      9'b0111_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd28};

      9'b0111_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd44};

      9'b0110_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd52};

      9'b0110_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd56};

      9'b0101_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd1};

      9'b0101_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd61};

      9'b0100_1xxx_x: coded_block_pattern_dec = {4'd5,  6'd2};

      9'b0100_0xxx_x: coded_block_pattern_dec = {4'd5,  6'd62};

      9'b1101_xxxx_x: coded_block_pattern_dec = {4'd4,  6'd4};

      9'b1100_xxxx_x: coded_block_pattern_dec = {4'd4,  6'd8};

      9'b1011_xxxx_x: coded_block_pattern_dec = {4'd4,  6'd16};

      9'b1010_xxxx_x: coded_block_pattern_dec = {4'd4,  6'd32};

      9'b111x_xxxx_x: coded_block_pattern_dec = {4'd3,  6'd60};

      default         coded_block_pattern_dec = {4'd0,  6'd0}; // Error

    endcase

  end

endfunction

/*

  Function motion_code_dec translates

  motion code vlc to {codelength, codeword, sign} triplets

  as in table B-10 from ISO/IEC 13818-2.

  First 4 bits of output are` code length,

  next 5 bits of output are code value,

  last bit is sign (1 = negative, 0 = positive).

*/

function [9:0]motion_code_dec;

  input [10:0]codeword;

  begin

    casex(codeword)

      11'b0000_0011_001: motion_code_dec = {4'd11, 5'd16, 1'b1};

      11'b0000_0011_011: motion_code_dec = {4'd11, 5'd15, 1'b1};

      11'b0000_0011_101: motion_code_dec = {4'd11, 5'd14, 1'b1};

      11'b0000_0011_111: motion_code_dec = {4'd11, 5'd13, 1'b1};

      11'b0000_0100_001: motion_code_dec = {4'd11, 5'd12, 1'b1};

      11'b0000_0100_011: motion_code_dec = {4'd11, 5'd11, 1'b1};

      11'b0000_0100_010: motion_code_dec = {4'd11, 5'd11, 1'b0};

      11'b0000_0100_000: motion_code_dec = {4'd11, 5'd12, 1'b0};

      11'b0000_0011_110: motion_code_dec = {4'd11, 5'd13, 1'b0};

      11'b0000_0011_100: motion_code_dec = {4'd11, 5'd14, 1'b0};

      11'b0000_0011_010: motion_code_dec = {4'd11, 5'd15, 1'b0};

      11'b0000_0011_000: motion_code_dec = {4'd11, 5'd16, 1'b0};

      11'b0000_0100_11x: motion_code_dec = {4'd10, 5'd10, 1'b1};

      11'b0000_0101_01x: motion_code_dec = {4'd10, 5'd9,  1'b1};

      11'b0000_0101_11x: motion_code_dec = {4'd10, 5'd8,  1'b1};

      11'b0000_0101_10x: motion_code_dec = {4'd10, 5'd8,  1'b0};

      11'b0000_0101_00x: motion_code_dec = {4'd10, 5'd9,  1'b0};

      11'b0000_0100_10x: motion_code_dec = {4'd10, 5'd10, 1'b0};

      11'b0000_0111_xxx: motion_code_dec = {4'd8,  5'd7,  1'b1};

      11'b0000_1001_xxx: motion_code_dec = {4'd8,  5'd6,  1'b1};

      11'b0000_1011_xxx: motion_code_dec = {4'd8,  5'd5,  1'b1};

      11'b0000_1010_xxx: motion_code_dec = {4'd8,  5'd5,  1'b0};

      11'b0000_1000_xxx: motion_code_dec = {4'd8,  5'd6,  1'b0};

      11'b0000_0110_xxx: motion_code_dec = {4'd8,  5'd7,  1'b0};

      11'b0000_111x_xxx: motion_code_dec = {4'd7,  5'd4,  1'b1};

      11'b0000_110x_xxx: motion_code_dec = {4'd7,  5'd4,  1'b0};

      11'b0001_1xxx_xxx: motion_code_dec = {4'd5,  5'd3,  1'b1};

      11'b0001_0xxx_xxx: motion_code_dec = {4'd5,  5'd3,  1'b0};

      11'b0011_xxxx_xxx: motion_code_dec = {4'd4,  5'd2,  1'b1};

      11'b0010_xxxx_xxx: motion_code_dec = {4'd4,  5'd2,  1'b0};

      11'b011x_xxxx_xxx: motion_code_dec = {4'd3,  5'd1,  1'b1};

      11'b010x_xxxx_xxx: motion_code_dec = {4'd3,  5'd1,  1'b0};

      11'b1xxx_xxxx_xxx: motion_code_dec = {4'd1,  5'd0,  1'b0};

      default            motion_code_dec = {4'd0,  5'd0,  1'b0}; // Error

    endcase

  end

endfunction

/*

  Function dmvector_dec translates

  dmvector vlc code to {codelength, codeword, sign} triplets

  as in table B-11 from ISO/IEC 13818-2.

  First 2 bits of output are` code length, next bit of output is code value.

  Last bit is sign (1 if negative, 0 if positive).

*/

function [3:0]dmvector_dec;

  input [1:0]codeword;

  begin

    casex(codeword)

      2'b11:  dmvector_dec = {2'd2,  1'd1, 1'b1};

      2'b10:  dmvector_dec = {2'd2,  1'd1, 1'b0};

      2'b0x:  dmvector_dec = {2'd1,  1'd0, 1'b0};

      default dmvector_dec = {2'd0,  1'd0, 1'b0}; // Error

    endcase

  end

endfunction

/*

  Function dct_dc_size_luminance_dec translates

  dct_dc_size_luminance vlc code to {codelength, codeword} pairs

  as in table B-12 from ISO/IEC 13818-2.

  First 4 bits of output are code length, next 5 bits are code value.

*/

function [8:0]dct_dc_size_luminance_dec;

  input [8:0]codeword;

  begin

    `ifdef DEBUG_VLC

    $strobe("%m\tcodeword:                    %b", codeword);

    $strobe("%m\tdct_dc_size_luminance_dec:   %b", dct_dc_size_luminance_dec);

    `endif

    casex(codeword)

      9'b1111_1111_0: dct_dc_size_luminance_dec = {4'd9, 5'd10};

      9'b1111_1111_1: dct_dc_size_luminance_dec = {4'd9, 5'd11};

      9'b1111_1110_x: dct_dc_size_luminance_dec = {4'd8, 5'd9};

      9'b1111_110x_x: dct_dc_size_luminance_dec = {4'd7, 5'd8};

      9'b1111_10xx_x: dct_dc_size_luminance_dec = {4'd6, 5'd7};

      9'b1111_0xxx_x: dct_dc_size_luminance_dec = {4'd5, 5'd6};

      9'b1110_xxxx_x: dct_dc_size_luminance_dec = {4'd4, 5'd5};

      9'b100x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd0};

      9'b101x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd3};

      9'b110x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd4};

      9'b00xx_xxxx_x: dct_dc_size_luminance_dec = {4'd2, 5'd1};

      9'b01xx_xxxx_x: dct_dc_size_luminance_dec = {4'd2, 5'd2};

      default         dct_dc_size_luminance_dec = {4'd0, 5'd0}; // Error

    endcase

  end

endfunction

/*

  Function dct_dc_size_chrominance_dec translates

  dct_dc_size_chrominance vlc code to {codelength, codeword} pairs

  as in table B-13 from ISO/IEC 13818-2.

  First 4 bits of output are code length, next 5 bits are code value.

*/

function [8:0]dct_dc_size_chrominance_dec;

  input [9:0]codeword;

  begin

    `ifdef DEBUG_VLC

    $strobe("%m\tcodeword:                    %b", codeword);

    $strobe("%m\tdct_dc_size_chrominance_dec: %b", dct_dc_size_chrominance_dec);

    `endif

    casex(codeword)

      10'b1111_1111_10: dct_dc_size_chrominance_dec = {4'd10, 5'd10};

      10'b1111_1111_11: dct_dc_size_chrominance_dec = {4'd10, 5'd11};

      10'b1111_1111_0x: dct_dc_size_chrominance_dec = {4'd9, 5'd9};

      10'b1111_1110_xx: dct_dc_size_chrominance_dec = {4'd8, 5'd8};

      10'b1111_110x_xx: dct_dc_size_chrominance_dec = {4'd7, 5'd7};

      10'b1111_10xx_xx: dct_dc_size_chrominance_dec = {4'd6, 5'd6};

      10'b1111_0xxx_xx: dct_dc_size_chrominance_dec = {4'd5, 5'd5};

      10'b1110_xxxx_xx: dct_dc_size_chrominance_dec = {4'd4, 5'd4};

      10'b110x_xxxx_xx: dct_dc_size_chrominance_dec = {4'd3, 5'd3};

      10'b00xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd0};

      10'b01xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd1};

      10'b10xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd2};

      default           dct_dc_size_chrominance_dec = {4'd0, 5'd0};

    endcase

  end

endfunction

/*

  Function dct_coefficient_0_dec translates

  dct coefficient table zero vlc code to {codelength, run , level} triplets

  as in table B-14 from ISO/IEC 13818-2.

  First 5 bits are code length,

  next 5 bits are run value,

  next 6 bits are unsigned level value.

  Code length includes sign bit.

*/

function [15:0]dct_coefficient_0_dec;

  input [15:0]codeword;

  begin

    `ifdef DEBUG_VLC

    $strobe("%m\tcodeword:                    %b", codeword);

    $strobe("%m\tdct_coefficient_0_dec:       %b", dct_coefficient_0_dec);

    `endif

    casex(codeword)

      16'b0000000000010011: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd15}; // codeword = 0000000000010011, run =  1, level =  15

      16'b0000000000010010: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd16}; // codeword = 0000000000010010, run =  1, level =  16

      16'b0000000000010001: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd17}; // codeword = 0000000000010001, run =  1, level =  17

      16'b0000000000010000: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd18}; // codeword = 0000000000010000, run =  1, level =  18

      16'b0000000000010100: dct_coefficient_0_dec = {5'd17, 5'd06, 6'd03}; // codeword = 0000000000010100, run =  6, level =   3

      16'b0000000000011010: dct_coefficient_0_dec = {5'd17, 5'd11, 6'd02}; // codeword = 0000000000011010, run = 11, level =   2

      16'b0000000000011001: dct_coefficient_0_dec = {5'd17, 5'd12, 6'd02}; // codeword = 0000000000011001, run = 12, level =   2

      16'b0000000000011000: dct_coefficient_0_dec = {5'd17, 5'd13, 6'd02}; // codeword = 0000000000011000, run = 13, level =   2

      16'b0000000000010111: dct_coefficient_0_dec = {5'd17, 5'd14, 6'd02}; // codeword = 0000000000010111, run = 14, level =   2

      16'b0000000000010110: dct_coefficient_0_dec = {5'd17, 5'd15, 6'd02}; // codeword = 0000000000010110, run = 15, level =   2

      16'b0000000000010101: dct_coefficient_0_dec = {5'd17, 5'd16, 6'd02}; // codeword = 0000000000010101, run = 16, level =   2

      16'b0000000000011111: dct_coefficient_0_dec = {5'd17, 5'd27, 6'd01}; // codeword = 0000000000011111, run = 27, level =   1

      16'b0000000000011110: dct_coefficient_0_dec = {5'd17, 5'd28, 6'd01}; // codeword = 0000000000011110, run = 28, level =   1

      16'b0000000000011101: dct_coefficient_0_dec = {5'd17, 5'd29, 6'd01}; // codeword = 0000000000011101, run = 29, level =   1

      16'b0000000000011100: dct_coefficient_0_dec = {5'd17, 5'd30, 6'd01}; // codeword = 0000000000011100, run = 30, level =   1

      16'b0000000000011011: dct_coefficient_0_dec = {5'd17, 5'd31, 6'd01}; // codeword = 0000000000011011, run = 31, level =   1

      16'b000000000011000x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd32}; // codeword = 000000000011000 , run =  0, level =  32

      16'b000000000010111x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd33}; // codeword = 000000000010111 , run =  0, level =  33

      16'b000000000010110x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd34}; // codeword = 000000000010110 , run =  0, level =  34

      16'b000000000010101x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd35}; // codeword = 000000000010101 , run =  0, level =  35

      16'b000000000010100x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd36}; // codeword = 000000000010100 , run =  0, level =  36

      16'b000000000010011x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd37}; // codeword = 000000000010011 , run =  0, level =  37

      16'b000000000010010x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd38}; // codeword = 000000000010010 , run =  0, level =  38

      16'b000000000010001x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd39}; // codeword = 000000000010001 , run =  0, level =  39

      16'b000000000010000x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd40}; // codeword = 000000000010000 , run =  0, level =  40

      16'b000000000011111x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd08}; // codeword = 000000000011111 , run =  1, level =   8

      16'b000000000011110x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd09}; // codeword = 000000000011110 , run =  1, level =   9

      16'b000000000011101x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd10}; // codeword = 000000000011101 , run =  1, level =  10

      16'b000000000011100x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd11}; // codeword = 000000000011100 , run =  1, level =  11

      16'b000000000011011x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd12}; // codeword = 000000000011011 , run =  1, level =  12

      16'b000000000011010x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd13}; // codeword = 000000000011010 , run =  1, level =  13

      16'b000000000011001x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd14}; // codeword = 000000000011001 , run =  1, level =  14

      16'b00000000011111xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd16}; // codeword = 00000000011111  , run =  0, level =  16

      16'b00000000011110xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd17}; // codeword = 00000000011110  , run =  0, level =  17

      16'b00000000011101xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd18}; // codeword = 00000000011101  , run =  0, level =  18

      16'b00000000011100xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd19}; // codeword = 00000000011100  , run =  0, level =  19

      16'b00000000011011xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd20}; // codeword = 00000000011011  , run =  0, level =  20

      16'b00000000011010xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd21}; // codeword = 00000000011010  , run =  0, level =  21

      16'b00000000011001xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd22}; // codeword = 00000000011001  , run =  0, level =  22

      16'b00000000011000xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd23}; // codeword = 00000000011000  , run =  0, level =  23

      16'b00000000010111xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd24}; // codeword = 00000000010111  , run =  0, level =  24

      16'b00000000010110xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd25}; // codeword = 00000000010110  , run =  0, level =  25

      16'b00000000010101xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd26}; // codeword = 00000000010101  , run =  0, level =  26

      16'b00000000010100xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd27}; // codeword = 00000000010100  , run =  0, level =  27

      16'b00000000010011xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd28}; // codeword = 00000000010011  , run =  0, level =  28

      16'b00000000010010xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd29}; // codeword = 00000000010010  , run =  0, level =  29

      16'b00000000010001xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd30}; // codeword = 00000000010001  , run =  0, level =  30

      16'b00000000010000xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd31}; // codeword = 00000000010000  , run =  0, level =  31

      16'b0000000011010xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd12}; // codeword = 0000000011010   , run =  0, level =  12

      16'b0000000011001xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd13}; // codeword = 0000000011001   , run =  0, level =  13

      16'b0000000011000xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd14}; // codeword = 0000000011000   , run =  0, level =  14

      16'b0000000010111xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd15}; // codeword = 0000000010111   , run =  0, level =  15