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/*
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* vlc_tables.v
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*
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* Copyright (c) 2007 Koen De Vleeschauwer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* vlc_tables - Variable Length Code Tables. Tables B-1 to B-5 and B-9 to B-15 from ISO/IEC 13818-2.
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*/
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/*
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Function macroblock_address_increment_dec translates
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macroblock address increment vlc code to {codelength, codeword} pairs
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as in table B-1 from ISO/IEC 13818-2.
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First 4 bits of output are` code length, next 5 bits of output are code value.
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*/
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function [10:0]macroblock_address_increment_dec;
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input [10:0]codeword;
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begin
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casex(codeword)
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11'b0000_0100_011: macroblock_address_increment_dec = {4'd11, 6'd22, 1'b0};
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11'b0000_0100_010: macroblock_address_increment_dec = {4'd11, 6'd23, 1'b0};
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11'b0000_0100_001: macroblock_address_increment_dec = {4'd11, 6'd24, 1'b0};
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11'b0000_0100_000: macroblock_address_increment_dec = {4'd11, 6'd25, 1'b0};
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11'b0000_0011_111: macroblock_address_increment_dec = {4'd11, 6'd26, 1'b0};
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11'b0000_0011_110: macroblock_address_increment_dec = {4'd11, 6'd27, 1'b0};
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11'b0000_0011_101: macroblock_address_increment_dec = {4'd11, 6'd28, 1'b0};
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11'b0000_0011_100: macroblock_address_increment_dec = {4'd11, 6'd29, 1'b0};
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11'b0000_0011_011: macroblock_address_increment_dec = {4'd11, 6'd30, 1'b0};
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11'b0000_0011_010: macroblock_address_increment_dec = {4'd11, 6'd31, 1'b0};
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11'b0000_0011_001: macroblock_address_increment_dec = {4'd11, 6'd32, 1'b0};
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11'b0000_0011_000: macroblock_address_increment_dec = {4'd11, 6'd33, 1'b0};
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11'b0000_0001_000: macroblock_address_increment_dec = {4'd11, 6'd33, 1'b1}; // macroblock_escape
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11'b0000_0101_11x: macroblock_address_increment_dec = {4'd10, 6'd16, 1'b0};
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11'b0000_0101_10x: macroblock_address_increment_dec = {4'd10, 6'd17, 1'b0};
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11'b0000_0101_01x: macroblock_address_increment_dec = {4'd10, 6'd18, 1'b0};
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11'b0000_0101_00x: macroblock_address_increment_dec = {4'd10, 6'd19, 1'b0};
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11'b0000_0100_11x: macroblock_address_increment_dec = {4'd10, 6'd20, 1'b0};
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11'b0000_0100_10x: macroblock_address_increment_dec = {4'd10, 6'd21, 1'b0};
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11'b0000_1011_xxx: macroblock_address_increment_dec = {4'd8, 6'd10, 1'b0};
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11'b0000_1010_xxx: macroblock_address_increment_dec = {4'd8, 6'd11, 1'b0};
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11'b0000_1001_xxx: macroblock_address_increment_dec = {4'd8, 6'd12, 1'b0};
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11'b0000_1000_xxx: macroblock_address_increment_dec = {4'd8, 6'd13, 1'b0};
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11'b0000_0111_xxx: macroblock_address_increment_dec = {4'd8, 6'd14, 1'b0};
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11'b0000_0110_xxx: macroblock_address_increment_dec = {4'd8, 6'd15, 1'b0};
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11'b0000_111x_xxx: macroblock_address_increment_dec = {4'd7, 6'd8, 1'b0};
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11'b0000_110x_xxx: macroblock_address_increment_dec = {4'd7, 6'd9, 1'b0};
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11'b0001_1xxx_xxx: macroblock_address_increment_dec = {4'd5, 6'd6, 1'b0};
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11'b0001_0xxx_xxx: macroblock_address_increment_dec = {4'd5, 6'd7, 1'b0};
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11'b0011_xxxx_xxx: macroblock_address_increment_dec = {4'd4, 6'd4, 1'b0};
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11'b0010_xxxx_xxx: macroblock_address_increment_dec = {4'd4, 6'd5, 1'b0};
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11'b011x_xxxx_xxx: macroblock_address_increment_dec = {4'd3, 6'd2, 1'b0};
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11'b010x_xxxx_xxx: macroblock_address_increment_dec = {4'd3, 6'd3, 1'b0};
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11'b1xxx_xxxx_xxx: macroblock_address_increment_dec = {4'd1, 6'd1, 1'b0};
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default macroblock_address_increment_dec = {4'd0, 6'd0, 1'b0}; // Error
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endcase
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end
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endfunction
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/*
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Function macroblock_type_dec translates
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macroblock type vlc code to {codelength, codeword} pairs
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in tables B-2 to B-5 from ISO/IEC 13818-2, as selected by picture_coding_type.
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I don't do scalability, hence scalable_mode and tables B-6 to B-8 are not used.
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First 4 bits of output are code length, next 6 bits of output are code value.
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Typical use:
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{next_shift[3:0], macroblock_quant, macroblock_motion_forward, macroblock_motion_backward,
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macroblock_pattern, macroblock_intra, spatial_temporal_weight_code_flag} =
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macroblock_type_dec(.picture_coding_type(picture_coding_type), .codeword(codeword));
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*/
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function [9:0]macroblock_type_dec;
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input [5:0]codeword;
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input [2:0]picture_coding_type;
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begin
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casex(picture_coding_type)
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3'b001: // intra-coded (I)
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casex(codeword)
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6'b01xx_xx: macroblock_type_dec = {4'd2, 6'b100010};
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6'b1xxx_xx: macroblock_type_dec = {4'd1, 6'b000010};
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default macroblock_type_dec = {4'd0, 6'b111111}; // Error
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endcase
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3'b010: // predictive-coded (P)
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casex(codeword)
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6'b0000_01: macroblock_type_dec = {4'd6, 6'b100010};
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6'b0001_1x: macroblock_type_dec = {4'd5, 6'b000010};
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6'b0001_0x: macroblock_type_dec = {4'd5, 6'b110100};
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6'b0000_1x: macroblock_type_dec = {4'd5, 6'b100100};
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6'b001x_xx: macroblock_type_dec = {4'd3, 6'b010000};
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6'b01xx_xx: macroblock_type_dec = {4'd2, 6'b000100};
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6'b1xxx_xx: macroblock_type_dec = {4'd1, 6'b010100};
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default macroblock_type_dec = {4'd0, 6'b111111}; // Error
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endcase
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3'b011: // bidirectionally-predictive-coded (B)
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casex(codeword)
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6'b0000_11: macroblock_type_dec = {4'd6, 6'b110100};
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6'b0000_10: macroblock_type_dec = {4'd6, 6'b101100};
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6'b0000_01: macroblock_type_dec = {4'd6, 6'b100010};
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6'b0001_1x: macroblock_type_dec = {4'd5, 6'b000010};
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6'b0001_0x: macroblock_type_dec = {4'd5, 6'b111100};
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6'b0010_xx: macroblock_type_dec = {4'd4, 6'b010000};
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6'b0011_xx: macroblock_type_dec = {4'd4, 6'b010100};
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6'b010x_xx: macroblock_type_dec = {4'd3, 6'b001000};
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6'b011x_xx: macroblock_type_dec = {4'd3, 6'b001100};
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6'b10xx_xx: macroblock_type_dec = {4'd2, 6'b011000};
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6'b11xx_xx: macroblock_type_dec = {4'd2, 6'b011100};
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default macroblock_type_dec = {4'd0, 6'b111111}; // Error
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endcase
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default // error
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macroblock_type_dec = {4'd0, 6'b111111}; // Error
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endcase
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end
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endfunction
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/*
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Function coded_block_pattern_dec translates
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coded block pattern vlc code to {codelength, codeword} pairs
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as in table B-9 from ISO/IEC 13818-2.
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First 4 bits of output are` code length, next 6 bits of output are code value.
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*/
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function [9:0]coded_block_pattern_dec;
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input [8:0]codeword;
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begin
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casex(codeword)
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9'b0000_0011_1: coded_block_pattern_dec = {4'd9, 6'd31};
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9'b0000_0011_0: coded_block_pattern_dec = {4'd9, 6'd47};
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9'b0000_0010_1: coded_block_pattern_dec = {4'd9, 6'd55};
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9'b0000_0010_0: coded_block_pattern_dec = {4'd9, 6'd59};
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9'b0000_0001_1: coded_block_pattern_dec = {4'd9, 6'd27};
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9'b0000_0001_0: coded_block_pattern_dec = {4'd9, 6'd39};
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9'b0000_0000_1: coded_block_pattern_dec = {4'd9, 6'd0};
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9'b0001_1111_x: coded_block_pattern_dec = {4'd8, 6'd7};
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9'b0001_1110_x: coded_block_pattern_dec = {4'd8, 6'd11};
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9'b0001_1101_x: coded_block_pattern_dec = {4'd8, 6'd19};
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9'b0001_1100_x: coded_block_pattern_dec = {4'd8, 6'd35};
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9'b0001_1011_x: coded_block_pattern_dec = {4'd8, 6'd13};
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9'b0001_1010_x: coded_block_pattern_dec = {4'd8, 6'd49};
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9'b0001_1001_x: coded_block_pattern_dec = {4'd8, 6'd21};
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9'b0001_1000_x: coded_block_pattern_dec = {4'd8, 6'd41};
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9'b0001_0111_x: coded_block_pattern_dec = {4'd8, 6'd14};
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9'b0001_0110_x: coded_block_pattern_dec = {4'd8, 6'd50};
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9'b0001_0101_x: coded_block_pattern_dec = {4'd8, 6'd22};
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9'b0001_0100_x: coded_block_pattern_dec = {4'd8, 6'd42};
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9'b0001_0011_x: coded_block_pattern_dec = {4'd8, 6'd15};
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9'b0001_0010_x: coded_block_pattern_dec = {4'd8, 6'd51};
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9'b0001_0001_x: coded_block_pattern_dec = {4'd8, 6'd23};
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9'b0001_0000_x: coded_block_pattern_dec = {4'd8, 6'd43};
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9'b0000_1111_x: coded_block_pattern_dec = {4'd8, 6'd25};
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9'b0000_1110_x: coded_block_pattern_dec = {4'd8, 6'd37};
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9'b0000_1101_x: coded_block_pattern_dec = {4'd8, 6'd26};
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9'b0000_1100_x: coded_block_pattern_dec = {4'd8, 6'd38};
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9'b0000_1011_x: coded_block_pattern_dec = {4'd8, 6'd29};
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9'b0000_1010_x: coded_block_pattern_dec = {4'd8, 6'd45};
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9'b0000_1001_x: coded_block_pattern_dec = {4'd8, 6'd53};
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9'b0000_1000_x: coded_block_pattern_dec = {4'd8, 6'd57};
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9'b0000_0111_x: coded_block_pattern_dec = {4'd8, 6'd30};
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9'b0000_0110_x: coded_block_pattern_dec = {4'd8, 6'd46};
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9'b0000_0101_x: coded_block_pattern_dec = {4'd8, 6'd54};
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9'b0000_0100_x: coded_block_pattern_dec = {4'd8, 6'd58};
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9'b0010_111x_x: coded_block_pattern_dec = {4'd7, 6'd5};
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9'b0010_110x_x: coded_block_pattern_dec = {4'd7, 6'd9};
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9'b0010_101x_x: coded_block_pattern_dec = {4'd7, 6'd17};
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9'b0010_100x_x: coded_block_pattern_dec = {4'd7, 6'd33};
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9'b0010_011x_x: coded_block_pattern_dec = {4'd7, 6'd6};
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9'b0010_010x_x: coded_block_pattern_dec = {4'd7, 6'd10};
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9'b0010_001x_x: coded_block_pattern_dec = {4'd7, 6'd18};
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9'b0010_000x_x: coded_block_pattern_dec = {4'd7, 6'd34};
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9'b0011_11xx_x: coded_block_pattern_dec = {4'd6, 6'd24};
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9'b0011_10xx_x: coded_block_pattern_dec = {4'd6, 6'd36};
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9'b0011_01xx_x: coded_block_pattern_dec = {4'd6, 6'd3};
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9'b0011_00xx_x: coded_block_pattern_dec = {4'd6, 6'd63};
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9'b1001_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd12};
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9'b1001_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd48};
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9'b1000_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd20};
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9'b1000_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd40};
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9'b0111_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd28};
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9'b0111_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd44};
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9'b0110_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd52};
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9'b0110_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd56};
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9'b0101_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd1};
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9'b0101_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd61};
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9'b0100_1xxx_x: coded_block_pattern_dec = {4'd5, 6'd2};
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9'b0100_0xxx_x: coded_block_pattern_dec = {4'd5, 6'd62};
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9'b1101_xxxx_x: coded_block_pattern_dec = {4'd4, 6'd4};
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9'b1100_xxxx_x: coded_block_pattern_dec = {4'd4, 6'd8};
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9'b1011_xxxx_x: coded_block_pattern_dec = {4'd4, 6'd16};
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9'b1010_xxxx_x: coded_block_pattern_dec = {4'd4, 6'd32};
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9'b111x_xxxx_x: coded_block_pattern_dec = {4'd3, 6'd60};
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default coded_block_pattern_dec = {4'd0, 6'd0}; // Error
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endcase
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end
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endfunction
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/*
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Function motion_code_dec translates
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motion code vlc to {codelength, codeword, sign} triplets
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as in table B-10 from ISO/IEC 13818-2.
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First 4 bits of output are` code length,
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next 5 bits of output are code value,
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last bit is sign (1 = negative, 0 = positive).
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*/
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function [9:0]motion_code_dec;
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input [10:0]codeword;
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begin
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casex(codeword)
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11'b0000_0011_001: motion_code_dec = {4'd11, 5'd16, 1'b1};
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11'b0000_0011_011: motion_code_dec = {4'd11, 5'd15, 1'b1};
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11'b0000_0011_101: motion_code_dec = {4'd11, 5'd14, 1'b1};
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11'b0000_0011_111: motion_code_dec = {4'd11, 5'd13, 1'b1};
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11'b0000_0100_001: motion_code_dec = {4'd11, 5'd12, 1'b1};
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11'b0000_0100_011: motion_code_dec = {4'd11, 5'd11, 1'b1};
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11'b0000_0100_010: motion_code_dec = {4'd11, 5'd11, 1'b0};
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11'b0000_0100_000: motion_code_dec = {4'd11, 5'd12, 1'b0};
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11'b0000_0011_110: motion_code_dec = {4'd11, 5'd13, 1'b0};
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11'b0000_0011_100: motion_code_dec = {4'd11, 5'd14, 1'b0};
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11'b0000_0011_010: motion_code_dec = {4'd11, 5'd15, 1'b0};
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11'b0000_0011_000: motion_code_dec = {4'd11, 5'd16, 1'b0};
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11'b0000_0100_11x: motion_code_dec = {4'd10, 5'd10, 1'b1};
|
235 |
|
|
11'b0000_0101_01x: motion_code_dec = {4'd10, 5'd9, 1'b1};
|
236 |
|
|
11'b0000_0101_11x: motion_code_dec = {4'd10, 5'd8, 1'b1};
|
237 |
|
|
11'b0000_0101_10x: motion_code_dec = {4'd10, 5'd8, 1'b0};
|
238 |
|
|
11'b0000_0101_00x: motion_code_dec = {4'd10, 5'd9, 1'b0};
|
239 |
|
|
11'b0000_0100_10x: motion_code_dec = {4'd10, 5'd10, 1'b0};
|
240 |
|
|
11'b0000_0111_xxx: motion_code_dec = {4'd8, 5'd7, 1'b1};
|
241 |
|
|
11'b0000_1001_xxx: motion_code_dec = {4'd8, 5'd6, 1'b1};
|
242 |
|
|
11'b0000_1011_xxx: motion_code_dec = {4'd8, 5'd5, 1'b1};
|
243 |
|
|
11'b0000_1010_xxx: motion_code_dec = {4'd8, 5'd5, 1'b0};
|
244 |
|
|
11'b0000_1000_xxx: motion_code_dec = {4'd8, 5'd6, 1'b0};
|
245 |
|
|
11'b0000_0110_xxx: motion_code_dec = {4'd8, 5'd7, 1'b0};
|
246 |
|
|
11'b0000_111x_xxx: motion_code_dec = {4'd7, 5'd4, 1'b1};
|
247 |
|
|
11'b0000_110x_xxx: motion_code_dec = {4'd7, 5'd4, 1'b0};
|
248 |
|
|
11'b0001_1xxx_xxx: motion_code_dec = {4'd5, 5'd3, 1'b1};
|
249 |
|
|
11'b0001_0xxx_xxx: motion_code_dec = {4'd5, 5'd3, 1'b0};
|
250 |
|
|
11'b0011_xxxx_xxx: motion_code_dec = {4'd4, 5'd2, 1'b1};
|
251 |
|
|
11'b0010_xxxx_xxx: motion_code_dec = {4'd4, 5'd2, 1'b0};
|
252 |
|
|
11'b011x_xxxx_xxx: motion_code_dec = {4'd3, 5'd1, 1'b1};
|
253 |
|
|
11'b010x_xxxx_xxx: motion_code_dec = {4'd3, 5'd1, 1'b0};
|
254 |
|
|
11'b1xxx_xxxx_xxx: motion_code_dec = {4'd1, 5'd0, 1'b0};
|
255 |
|
|
default motion_code_dec = {4'd0, 5'd0, 1'b0}; // Error
|
256 |
|
|
endcase
|
257 |
|
|
end
|
258 |
|
|
endfunction
|
259 |
|
|
|
260 |
|
|
|
261 |
|
|
/*
|
262 |
|
|
Function dmvector_dec translates
|
263 |
|
|
dmvector vlc code to {codelength, codeword, sign} triplets
|
264 |
|
|
as in table B-11 from ISO/IEC 13818-2.
|
265 |
|
|
First 2 bits of output are` code length, next bit of output is code value.
|
266 |
|
|
Last bit is sign (1 if negative, 0 if positive).
|
267 |
|
|
*/
|
268 |
|
|
|
269 |
|
|
function [3:0]dmvector_dec;
|
270 |
|
|
input [1:0]codeword;
|
271 |
|
|
begin
|
272 |
|
|
casex(codeword)
|
273 |
|
|
2'b11: dmvector_dec = {2'd2, 1'd1, 1'b1};
|
274 |
|
|
2'b10: dmvector_dec = {2'd2, 1'd1, 1'b0};
|
275 |
|
|
2'b0x: dmvector_dec = {2'd1, 1'd0, 1'b0};
|
276 |
|
|
default dmvector_dec = {2'd0, 1'd0, 1'b0}; // Error
|
277 |
|
|
endcase
|
278 |
|
|
end
|
279 |
|
|
endfunction
|
280 |
|
|
|
281 |
|
|
/*
|
282 |
|
|
Function dct_dc_size_luminance_dec translates
|
283 |
|
|
dct_dc_size_luminance vlc code to {codelength, codeword} pairs
|
284 |
|
|
as in table B-12 from ISO/IEC 13818-2.
|
285 |
|
|
First 4 bits of output are code length, next 5 bits are code value.
|
286 |
|
|
*/
|
287 |
|
|
|
288 |
|
|
function [8:0]dct_dc_size_luminance_dec;
|
289 |
|
|
input [8:0]codeword;
|
290 |
|
|
begin
|
291 |
|
|
`ifdef DEBUG_VLC
|
292 |
|
|
$strobe("%m\tcodeword: %b", codeword);
|
293 |
|
|
$strobe("%m\tdct_dc_size_luminance_dec: %b", dct_dc_size_luminance_dec);
|
294 |
|
|
`endif
|
295 |
|
|
casex(codeword)
|
296 |
|
|
9'b1111_1111_0: dct_dc_size_luminance_dec = {4'd9, 5'd10};
|
297 |
|
|
9'b1111_1111_1: dct_dc_size_luminance_dec = {4'd9, 5'd11};
|
298 |
|
|
9'b1111_1110_x: dct_dc_size_luminance_dec = {4'd8, 5'd9};
|
299 |
|
|
9'b1111_110x_x: dct_dc_size_luminance_dec = {4'd7, 5'd8};
|
300 |
|
|
9'b1111_10xx_x: dct_dc_size_luminance_dec = {4'd6, 5'd7};
|
301 |
|
|
9'b1111_0xxx_x: dct_dc_size_luminance_dec = {4'd5, 5'd6};
|
302 |
|
|
9'b1110_xxxx_x: dct_dc_size_luminance_dec = {4'd4, 5'd5};
|
303 |
|
|
9'b100x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd0};
|
304 |
|
|
9'b101x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd3};
|
305 |
|
|
9'b110x_xxxx_x: dct_dc_size_luminance_dec = {4'd3, 5'd4};
|
306 |
|
|
9'b00xx_xxxx_x: dct_dc_size_luminance_dec = {4'd2, 5'd1};
|
307 |
|
|
9'b01xx_xxxx_x: dct_dc_size_luminance_dec = {4'd2, 5'd2};
|
308 |
|
|
default dct_dc_size_luminance_dec = {4'd0, 5'd0}; // Error
|
309 |
|
|
endcase
|
310 |
|
|
end
|
311 |
|
|
endfunction
|
312 |
|
|
|
313 |
|
|
/*
|
314 |
|
|
Function dct_dc_size_chrominance_dec translates
|
315 |
|
|
dct_dc_size_chrominance vlc code to {codelength, codeword} pairs
|
316 |
|
|
as in table B-13 from ISO/IEC 13818-2.
|
317 |
|
|
First 4 bits of output are code length, next 5 bits are code value.
|
318 |
|
|
*/
|
319 |
|
|
|
320 |
|
|
function [8:0]dct_dc_size_chrominance_dec;
|
321 |
|
|
input [9:0]codeword;
|
322 |
|
|
begin
|
323 |
|
|
`ifdef DEBUG_VLC
|
324 |
|
|
$strobe("%m\tcodeword: %b", codeword);
|
325 |
|
|
$strobe("%m\tdct_dc_size_chrominance_dec: %b", dct_dc_size_chrominance_dec);
|
326 |
|
|
`endif
|
327 |
|
|
casex(codeword)
|
328 |
|
|
10'b1111_1111_10: dct_dc_size_chrominance_dec = {4'd10, 5'd10};
|
329 |
|
|
10'b1111_1111_11: dct_dc_size_chrominance_dec = {4'd10, 5'd11};
|
330 |
|
|
10'b1111_1111_0x: dct_dc_size_chrominance_dec = {4'd9, 5'd9};
|
331 |
|
|
10'b1111_1110_xx: dct_dc_size_chrominance_dec = {4'd8, 5'd8};
|
332 |
|
|
10'b1111_110x_xx: dct_dc_size_chrominance_dec = {4'd7, 5'd7};
|
333 |
|
|
10'b1111_10xx_xx: dct_dc_size_chrominance_dec = {4'd6, 5'd6};
|
334 |
|
|
10'b1111_0xxx_xx: dct_dc_size_chrominance_dec = {4'd5, 5'd5};
|
335 |
|
|
10'b1110_xxxx_xx: dct_dc_size_chrominance_dec = {4'd4, 5'd4};
|
336 |
|
|
10'b110x_xxxx_xx: dct_dc_size_chrominance_dec = {4'd3, 5'd3};
|
337 |
|
|
10'b00xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd0};
|
338 |
|
|
10'b01xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd1};
|
339 |
|
|
10'b10xx_xxxx_xx: dct_dc_size_chrominance_dec = {4'd2, 5'd2};
|
340 |
|
|
default dct_dc_size_chrominance_dec = {4'd0, 5'd0};
|
341 |
|
|
endcase
|
342 |
|
|
end
|
343 |
|
|
endfunction
|
344 |
|
|
|
345 |
|
|
/*
|
346 |
|
|
Function dct_coefficient_0_dec translates
|
347 |
|
|
dct coefficient table zero vlc code to {codelength, run , level} triplets
|
348 |
|
|
as in table B-14 from ISO/IEC 13818-2.
|
349 |
|
|
First 5 bits are code length,
|
350 |
|
|
next 5 bits are run value,
|
351 |
|
|
next 6 bits are unsigned level value.
|
352 |
|
|
Code length includes sign bit.
|
353 |
|
|
*/
|
354 |
|
|
|
355 |
|
|
function [15:0]dct_coefficient_0_dec;
|
356 |
|
|
input [15:0]codeword;
|
357 |
|
|
begin
|
358 |
|
|
`ifdef DEBUG_VLC
|
359 |
|
|
$strobe("%m\tcodeword: %b", codeword);
|
360 |
|
|
$strobe("%m\tdct_coefficient_0_dec: %b", dct_coefficient_0_dec);
|
361 |
|
|
`endif
|
362 |
|
|
casex(codeword)
|
363 |
|
|
16'b0000000000010011: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd15}; // codeword = 0000000000010011, run = 1, level = 15
|
364 |
|
|
16'b0000000000010010: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd16}; // codeword = 0000000000010010, run = 1, level = 16
|
365 |
|
|
16'b0000000000010001: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd17}; // codeword = 0000000000010001, run = 1, level = 17
|
366 |
|
|
16'b0000000000010000: dct_coefficient_0_dec = {5'd17, 5'd01, 6'd18}; // codeword = 0000000000010000, run = 1, level = 18
|
367 |
|
|
16'b0000000000010100: dct_coefficient_0_dec = {5'd17, 5'd06, 6'd03}; // codeword = 0000000000010100, run = 6, level = 3
|
368 |
|
|
16'b0000000000011010: dct_coefficient_0_dec = {5'd17, 5'd11, 6'd02}; // codeword = 0000000000011010, run = 11, level = 2
|
369 |
|
|
16'b0000000000011001: dct_coefficient_0_dec = {5'd17, 5'd12, 6'd02}; // codeword = 0000000000011001, run = 12, level = 2
|
370 |
|
|
16'b0000000000011000: dct_coefficient_0_dec = {5'd17, 5'd13, 6'd02}; // codeword = 0000000000011000, run = 13, level = 2
|
371 |
|
|
16'b0000000000010111: dct_coefficient_0_dec = {5'd17, 5'd14, 6'd02}; // codeword = 0000000000010111, run = 14, level = 2
|
372 |
|
|
16'b0000000000010110: dct_coefficient_0_dec = {5'd17, 5'd15, 6'd02}; // codeword = 0000000000010110, run = 15, level = 2
|
373 |
|
|
16'b0000000000010101: dct_coefficient_0_dec = {5'd17, 5'd16, 6'd02}; // codeword = 0000000000010101, run = 16, level = 2
|
374 |
|
|
16'b0000000000011111: dct_coefficient_0_dec = {5'd17, 5'd27, 6'd01}; // codeword = 0000000000011111, run = 27, level = 1
|
375 |
|
|
16'b0000000000011110: dct_coefficient_0_dec = {5'd17, 5'd28, 6'd01}; // codeword = 0000000000011110, run = 28, level = 1
|
376 |
|
|
16'b0000000000011101: dct_coefficient_0_dec = {5'd17, 5'd29, 6'd01}; // codeword = 0000000000011101, run = 29, level = 1
|
377 |
|
|
16'b0000000000011100: dct_coefficient_0_dec = {5'd17, 5'd30, 6'd01}; // codeword = 0000000000011100, run = 30, level = 1
|
378 |
|
|
16'b0000000000011011: dct_coefficient_0_dec = {5'd17, 5'd31, 6'd01}; // codeword = 0000000000011011, run = 31, level = 1
|
379 |
|
|
16'b000000000011000x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd32}; // codeword = 000000000011000 , run = 0, level = 32
|
380 |
|
|
16'b000000000010111x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd33}; // codeword = 000000000010111 , run = 0, level = 33
|
381 |
|
|
16'b000000000010110x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd34}; // codeword = 000000000010110 , run = 0, level = 34
|
382 |
|
|
16'b000000000010101x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd35}; // codeword = 000000000010101 , run = 0, level = 35
|
383 |
|
|
16'b000000000010100x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd36}; // codeword = 000000000010100 , run = 0, level = 36
|
384 |
|
|
16'b000000000010011x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd37}; // codeword = 000000000010011 , run = 0, level = 37
|
385 |
|
|
16'b000000000010010x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd38}; // codeword = 000000000010010 , run = 0, level = 38
|
386 |
|
|
16'b000000000010001x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd39}; // codeword = 000000000010001 , run = 0, level = 39
|
387 |
|
|
16'b000000000010000x: dct_coefficient_0_dec = {5'd16, 5'd00, 6'd40}; // codeword = 000000000010000 , run = 0, level = 40
|
388 |
|
|
16'b000000000011111x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd08}; // codeword = 000000000011111 , run = 1, level = 8
|
389 |
|
|
16'b000000000011110x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd09}; // codeword = 000000000011110 , run = 1, level = 9
|
390 |
|
|
16'b000000000011101x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd10}; // codeword = 000000000011101 , run = 1, level = 10
|
391 |
|
|
16'b000000000011100x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd11}; // codeword = 000000000011100 , run = 1, level = 11
|
392 |
|
|
16'b000000000011011x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd12}; // codeword = 000000000011011 , run = 1, level = 12
|
393 |
|
|
16'b000000000011010x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd13}; // codeword = 000000000011010 , run = 1, level = 13
|
394 |
|
|
16'b000000000011001x: dct_coefficient_0_dec = {5'd16, 5'd01, 6'd14}; // codeword = 000000000011001 , run = 1, level = 14
|
395 |
|
|
16'b00000000011111xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd16}; // codeword = 00000000011111 , run = 0, level = 16
|
396 |
|
|
16'b00000000011110xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd17}; // codeword = 00000000011110 , run = 0, level = 17
|
397 |
|
|
16'b00000000011101xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd18}; // codeword = 00000000011101 , run = 0, level = 18
|
398 |
|
|
16'b00000000011100xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd19}; // codeword = 00000000011100 , run = 0, level = 19
|
399 |
|
|
16'b00000000011011xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd20}; // codeword = 00000000011011 , run = 0, level = 20
|
400 |
|
|
16'b00000000011010xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd21}; // codeword = 00000000011010 , run = 0, level = 21
|
401 |
|
|
16'b00000000011001xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd22}; // codeword = 00000000011001 , run = 0, level = 22
|
402 |
|
|
16'b00000000011000xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd23}; // codeword = 00000000011000 , run = 0, level = 23
|
403 |
|
|
16'b00000000010111xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd24}; // codeword = 00000000010111 , run = 0, level = 24
|
404 |
|
|
16'b00000000010110xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd25}; // codeword = 00000000010110 , run = 0, level = 25
|
405 |
|
|
16'b00000000010101xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd26}; // codeword = 00000000010101 , run = 0, level = 26
|
406 |
|
|
16'b00000000010100xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd27}; // codeword = 00000000010100 , run = 0, level = 27
|
407 |
|
|
16'b00000000010011xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd28}; // codeword = 00000000010011 , run = 0, level = 28
|
408 |
|
|
16'b00000000010010xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd29}; // codeword = 00000000010010 , run = 0, level = 29
|
409 |
|
|
16'b00000000010001xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd30}; // codeword = 00000000010001 , run = 0, level = 30
|
410 |
|
|
16'b00000000010000xx: dct_coefficient_0_dec = {5'd15, 5'd00, 6'd31}; // codeword = 00000000010000 , run = 0, level = 31
|
411 |
|
|
16'b0000000011010xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd12}; // codeword = 0000000011010 , run = 0, level = 12
|
412 |
|
|
16'b0000000011001xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd13}; // codeword = 0000000011001 , run = 0, level = 13
|
413 |
|
|
16'b0000000011000xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd14}; // codeword = 0000000011000 , run = 0, level = 14
|
414 |
|
|
16'b0000000010111xxx: dct_coefficient_0_dec = {5'd14, 5'd00, 6'd15}; // codeword = 0000000010111 , run = 0, level = 15
|
415 |
|
|
16'b0000000010110xxx: dct_coefficient_0_dec = {5'd14, 5'd01, 6'd06}; // codeword = 0000000010110 , run = 1, level = 6
|
416 |
|
|
16'b0000000010101xxx: dct_coefficient_0_dec = {5'd14, 5'd01, 6'd07}; // codeword = 0000000010101 , run = 1, level = 7
|
417 |
|
|
16'b0000000010100xxx: dct_coefficient_0_dec = {5'd14, 5'd02, 6'd05}; // codeword = 0000000010100 , run = 2, level = 5
|
418 |
|
|
16'b0000000010011xxx: dct_coefficient_0_dec = {5'd14, 5'd03, 6'd04}; // codeword = 0000000010011 , run = 3, level = 4
|
419 |
|
|
16'b0000000010010xxx: dct_coefficient_0_dec = {5'd14, 5'd05, 6'd03}; // codeword = 0000000010010 , run = 5, level = 3
|
420 |
|
|
16'b0000000010001xxx: dct_coefficient_0_dec = {5'd14, 5'd09, 6'd02}; // codeword = 0000000010001 , run = 9, level = 2
|
421 |
|
|
16'b0000000010000xxx: dct_coefficient_0_dec = {5'd14, 5'd10, 6'd02}; // codeword = 0000000010000 , run = 10, level = 2
|
422 |
|
|
16'b0000000011111xxx: dct_coefficient_0_dec = {5'd14, 5'd22, 6'd01}; // codeword = 0000000011111 , run = 22, level = 1
|
423 |
|
|
16'b0000000011110xxx: dct_coefficient_0_dec = {5'd14, 5'd23, 6'd01}; // codeword = 0000000011110 , run = 23, level = 1
|
424 |
|
|
16'b0000000011101xxx: dct_coefficient_0_dec = {5'd14, 5'd24, 6'd01}; // codeword = 0000000011101 , run = 24, level = 1
|
425 |
|
|
16'b0000000011100xxx: dct_coefficient_0_dec = {5'd14, 5'd25, 6'd01}; // codeword = 0000000011100 , run = 25, level = 1
|
426 |
|
|
16'b0000000011011xxx: dct_coefficient_0_dec = {5'd14, 5'd26, 6'd01}; // codeword = 0000000011011 , run = 26, level = 1
|
427 |
|
|
16'b000000011101xxxx: dct_coefficient_0_dec = {5'd13, 5'd00, 6'd08}; // codeword = 000000011101 , run = 0, level = 8
|
428 |
|
|
16'b000000011000xxxx: dct_coefficient_0_dec = {5'd13, 5'd00, 6'd09}; // codeword = 000000011000 , run = 0, level = 9
|
429 |
|
|
16'b000000010011xxxx: dct_coefficient_0_dec = {5'd13, 5'd00, 6'd10}; // codeword = 000000010011 , run = 0, level = 10
|
430 |
|
|
16'b000000010000xxxx: dct_coefficient_0_dec = {5'd13, 5'd00, 6'd11}; // codeword = 000000010000 , run = 0, level = 11
|
431 |
|
|
16'b000000011011xxxx: dct_coefficient_0_dec = {5'd13, 5'd01, 6'd05}; // codeword = 000000011011 , run = 1, level = 5
|
432 |
|
|
16'b000000010100xxxx: dct_coefficient_0_dec = {5'd13, 5'd02, 6'd04}; // codeword = 000000010100 , run = 2, level = 4
|
433 |
|
|
16'b000000011100xxxx: dct_coefficient_0_dec = {5'd13, 5'd03, 6'd03}; // codeword = 000000011100 , run = 3, level = 3
|
434 |
|
|
16'b000000010010xxxx: dct_coefficient_0_dec = {5'd13, 5'd04, 6'd03}; // codeword = 000000010010 , run = 4, level = 3
|
435 |
|
|
16'b000000011110xxxx: dct_coefficient_0_dec = {5'd13, 5'd06, 6'd02}; // codeword = 000000011110 , run = 6, level = 2
|
436 |
|
|
16'b000000010101xxxx: dct_coefficient_0_dec = {5'd13, 5'd07, 6'd02}; // codeword = 000000010101 , run = 7, level = 2
|
437 |
|
|
16'b000000010001xxxx: dct_coefficient_0_dec = {5'd13, 5'd08, 6'd02}; // codeword = 000000010001 , run = 8, level = 2
|
438 |
|
|
16'b000000011111xxxx: dct_coefficient_0_dec = {5'd13, 5'd17, 6'd01}; // codeword = 000000011111 , run = 17, level = 1
|
439 |
|
|
16'b000000011010xxxx: dct_coefficient_0_dec = {5'd13, 5'd18, 6'd01}; // codeword = 000000011010 , run = 18, level = 1
|
440 |
|
|
16'b000000011001xxxx: dct_coefficient_0_dec = {5'd13, 5'd19, 6'd01}; // codeword = 000000011001 , run = 19, level = 1
|
441 |
|
|
16'b000000010111xxxx: dct_coefficient_0_dec = {5'd13, 5'd20, 6'd01}; // codeword = 000000010111 , run = 20, level = 1
|
442 |
|
|
16'b000000010110xxxx: dct_coefficient_0_dec = {5'd13, 5'd21, 6'd01}; // codeword = 000000010110 , run = 21, level = 1
|
443 |
|
|
16'b0000001010xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd00, 6'd07}; // codeword = 0000001010 , run = 0, level = 7
|
444 |
|
|
16'b0000001100xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd01, 6'd04}; // codeword = 0000001100 , run = 1, level = 4
|
445 |
|
|
16'b0000001011xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd02, 6'd03}; // codeword = 0000001011 , run = 2, level = 3
|
446 |
|
|
16'b0000001111xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd04, 6'd02}; // codeword = 0000001111 , run = 4, level = 2
|
447 |
|
|
16'b0000001001xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd05, 6'd02}; // codeword = 0000001001 , run = 5, level = 2
|
448 |
|
|
16'b0000001110xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd14, 6'd01}; // codeword = 0000001110 , run = 14, level = 1
|
449 |
|
|
16'b0000001101xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd15, 6'd01}; // codeword = 0000001101 , run = 15, level = 1
|
450 |
|
|
16'b0000001000xxxxxx: dct_coefficient_0_dec = {5'd11, 5'd16, 6'd01}; // codeword = 0000001000 , run = 16, level = 1
|
451 |
|
|
16'b00100110xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd00, 6'd05}; // codeword = 00100110 , run = 0, level = 5
|
452 |
|
|
16'b00100001xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd00, 6'd06}; // codeword = 00100001 , run = 0, level = 6
|
453 |
|
|
16'b00100101xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd01, 6'd03}; // codeword = 00100101 , run = 1, level = 3
|
454 |
|
|
16'b00100100xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd03, 6'd02}; // codeword = 00100100 , run = 3, level = 2
|
455 |
|
|
16'b00100111xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd10, 6'd01}; // codeword = 00100111 , run = 10, level = 1
|
456 |
|
|
16'b00100011xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd11, 6'd01}; // codeword = 00100011 , run = 11, level = 1
|
457 |
|
|
16'b00100010xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd12, 6'd01}; // codeword = 00100010 , run = 12, level = 1
|
458 |
|
|
16'b00100000xxxxxxxx: dct_coefficient_0_dec = {5'd09, 5'd13, 6'd01}; // codeword = 00100000 , run = 13, level = 1
|
459 |
|
|
16'b0000110xxxxxxxxx: dct_coefficient_0_dec = {5'd08, 5'd00, 6'd04}; // codeword = 0000110 , run = 0, level = 4
|
460 |
|
|
16'b0000100xxxxxxxxx: dct_coefficient_0_dec = {5'd08, 5'd02, 6'd02}; // codeword = 0000100 , run = 2, level = 2
|
461 |
|
|
16'b0000111xxxxxxxxx: dct_coefficient_0_dec = {5'd08, 5'd08, 6'd01}; // codeword = 0000111 , run = 8, level = 1
|
462 |
|
|
16'b0000101xxxxxxxxx: dct_coefficient_0_dec = {5'd08, 5'd09, 6'd01}; // codeword = 0000101 , run = 9, level = 1
|
463 |
|
|
16'b000110xxxxxxxxxx: dct_coefficient_0_dec = {5'd07, 5'd01, 6'd02}; // codeword = 000110 , run = 1, level = 2
|
464 |
|
|
16'b000111xxxxxxxxxx: dct_coefficient_0_dec = {5'd07, 5'd05, 6'd01}; // codeword = 000111 , run = 5, level = 1
|
465 |
|
|
16'b000101xxxxxxxxxx: dct_coefficient_0_dec = {5'd07, 5'd06, 6'd01}; // codeword = 000101 , run = 6, level = 1
|
466 |
|
|
16'b000100xxxxxxxxxx: dct_coefficient_0_dec = {5'd07, 5'd07, 6'd01}; // codeword = 000100 , run = 7, level = 1
|
467 |
|
|
16'b000001xxxxxxxxxx: dct_coefficient_0_dec = {5'd06, 5'd00, 6'd00}; // codeword = 000001 , escape (no sign bit)
|
468 |
|
|
16'b00101xxxxxxxxxxx: dct_coefficient_0_dec = {5'd06, 5'd00, 6'd03}; // codeword = 00101 , run = 0, level = 3
|
469 |
|
|
16'b00111xxxxxxxxxxx: dct_coefficient_0_dec = {5'd06, 5'd03, 6'd01}; // codeword = 00111 , run = 3, level = 1
|
470 |
|
|
16'b00110xxxxxxxxxxx: dct_coefficient_0_dec = {5'd06, 5'd04, 6'd01}; // codeword = 00110 , run = 4, level = 1
|
471 |
|
|
16'b0100xxxxxxxxxxxx: dct_coefficient_0_dec = {5'd05, 5'd00, 6'd02}; // codeword = 0100 , run = 0, level = 2
|
472 |
|
|
16'b0101xxxxxxxxxxxx: dct_coefficient_0_dec = {5'd05, 5'd02, 6'd01}; // codeword = 0101 , run = 2, level = 1
|
473 |
|
|
16'b011xxxxxxxxxxxxx: dct_coefficient_0_dec = {5'd04, 5'd01, 6'd01}; // codeword = 011 , run = 1, level = 1
|
474 |
|
|
16'b10xxxxxxxxxxxxxx: dct_coefficient_0_dec = {5'd02, 5'd00, 6'd00}; // codeword = 10 , end of block (no sign bit)
|
475 |
|
|
16'b11xxxxxxxxxxxxxx: dct_coefficient_0_dec = {5'd03, 5'd00, 6'd01}; // codeword = 11 , run = 0, level = 1
|
476 |
|
|
default dct_coefficient_0_dec = {5'd00, 5'd00, 6'd00}; // Error
|
477 |
|
|
endcase
|
478 |
|
|
end
|
479 |
|
|
endfunction
|
480 |
|
|
|
481 |
|
|
/*
|
482 |
|
|
Function dct_coefficient_1_dec translates
|
483 |
|
|
dct coefficient table one vlc code to {codelength, run, level} triplets
|
484 |
|
|
as in table B-15 from ISO/IEC 13818-2.
|
485 |
|
|
First 5 bits are code length,
|
486 |
|
|
next 5 bits are run value,
|
487 |
|
|
next 6 bits are unsigned level value.
|
488 |
|
|
Code length includes sign bit.
|
489 |
|
|
*/
|
490 |
|
|
|
491 |
|
|
function [15:0]dct_coefficient_1_dec;
|
492 |
|
|
input [15:0]codeword;
|
493 |
|
|
begin
|
494 |
|
|
`ifdef DEBUG_VLC
|
495 |
|
|
$strobe("%m\tcodeword: %b", codeword);
|
496 |
|
|
$strobe("%m\tdct_coefficient_1_dec: %b", dct_coefficient_1_dec);
|
497 |
|
|
`endif
|
498 |
|
|
casex(codeword)
|
499 |
|
|
16'b0000000000010011: dct_coefficient_1_dec = {5'd17, 5'd01, 6'd15}; // codeword = 0000000000010011, run = 1, level = 15
|
500 |
|
|
16'b0000000000010010: dct_coefficient_1_dec = {5'd17, 5'd01, 6'd16}; // codeword = 0000000000010010, run = 1, level = 16
|
501 |
|
|
16'b0000000000010001: dct_coefficient_1_dec = {5'd17, 5'd01, 6'd17}; // codeword = 0000000000010001, run = 1, level = 17
|
502 |
|
|
16'b0000000000010000: dct_coefficient_1_dec = {5'd17, 5'd01, 6'd18}; // codeword = 0000000000010000, run = 1, level = 18
|
503 |
|
|
16'b0000000000010100: dct_coefficient_1_dec = {5'd17, 5'd06, 6'd03}; // codeword = 0000000000010100, run = 6, level = 3
|
504 |
|
|
16'b0000000000011010: dct_coefficient_1_dec = {5'd17, 5'd11, 6'd02}; // codeword = 0000000000011010, run = 11, level = 2
|
505 |
|
|
16'b0000000000011001: dct_coefficient_1_dec = {5'd17, 5'd12, 6'd02}; // codeword = 0000000000011001, run = 12, level = 2
|
506 |
|
|
16'b0000000000011000: dct_coefficient_1_dec = {5'd17, 5'd13, 6'd02}; // codeword = 0000000000011000, run = 13, level = 2
|
507 |
|
|
16'b0000000000010111: dct_coefficient_1_dec = {5'd17, 5'd14, 6'd02}; // codeword = 0000000000010111, run = 14, level = 2
|
508 |
|
|
16'b0000000000010110: dct_coefficient_1_dec = {5'd17, 5'd15, 6'd02}; // codeword = 0000000000010110, run = 15, level = 2
|
509 |
|
|
16'b0000000000010101: dct_coefficient_1_dec = {5'd17, 5'd16, 6'd02}; // codeword = 0000000000010101, run = 16, level = 2
|
510 |
|
|
16'b0000000000011111: dct_coefficient_1_dec = {5'd17, 5'd27, 6'd01}; // codeword = 0000000000011111, run = 27, level = 1
|
511 |
|
|
16'b0000000000011110: dct_coefficient_1_dec = {5'd17, 5'd28, 6'd01}; // codeword = 0000000000011110, run = 28, level = 1
|
512 |
|
|
16'b0000000000011101: dct_coefficient_1_dec = {5'd17, 5'd29, 6'd01}; // codeword = 0000000000011101, run = 29, level = 1
|
513 |
|
|
16'b0000000000011100: dct_coefficient_1_dec = {5'd17, 5'd30, 6'd01}; // codeword = 0000000000011100, run = 30, level = 1
|
514 |
|
|
16'b0000000000011011: dct_coefficient_1_dec = {5'd17, 5'd31, 6'd01}; // codeword = 0000000000011011, run = 31, level = 1
|
515 |
|
|
16'b000000000011000x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd32}; // codeword = 000000000011000 , run = 0, level = 32
|
516 |
|
|
16'b000000000010111x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd33}; // codeword = 000000000010111 , run = 0, level = 33
|
517 |
|
|
16'b000000000010110x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd34}; // codeword = 000000000010110 , run = 0, level = 34
|
518 |
|
|
16'b000000000010101x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd35}; // codeword = 000000000010101 , run = 0, level = 35
|
519 |
|
|
16'b000000000010100x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd36}; // codeword = 000000000010100 , run = 0, level = 36
|
520 |
|
|
16'b000000000010011x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd37}; // codeword = 000000000010011 , run = 0, level = 37
|
521 |
|
|
16'b000000000010010x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd38}; // codeword = 000000000010010 , run = 0, level = 38
|
522 |
|
|
16'b000000000010001x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd39}; // codeword = 000000000010001 , run = 0, level = 39
|
523 |
|
|
16'b000000000010000x: dct_coefficient_1_dec = {5'd16, 5'd00, 6'd40}; // codeword = 000000000010000 , run = 0, level = 40
|
524 |
|
|
16'b000000000011111x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd08}; // codeword = 000000000011111 , run = 1, level = 8
|
525 |
|
|
16'b000000000011110x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd09}; // codeword = 000000000011110 , run = 1, level = 9
|
526 |
|
|
16'b000000000011101x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd10}; // codeword = 000000000011101 , run = 1, level = 10
|
527 |
|
|
16'b000000000011100x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd11}; // codeword = 000000000011100 , run = 1, level = 11
|
528 |
|
|
16'b000000000011011x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd12}; // codeword = 000000000011011 , run = 1, level = 12
|
529 |
|
|
16'b000000000011010x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd13}; // codeword = 000000000011010 , run = 1, level = 13
|
530 |
|
|
16'b000000000011001x: dct_coefficient_1_dec = {5'd16, 5'd01, 6'd14}; // codeword = 000000000011001 , run = 1, level = 14
|
531 |
|
|
16'b00000000011111xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd16}; // codeword = 00000000011111 , run = 0, level = 16
|
532 |
|
|
16'b00000000011110xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd17}; // codeword = 00000000011110 , run = 0, level = 17
|
533 |
|
|
16'b00000000011101xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd18}; // codeword = 00000000011101 , run = 0, level = 18
|
534 |
|
|
16'b00000000011100xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd19}; // codeword = 00000000011100 , run = 0, level = 19
|
535 |
|
|
16'b00000000011011xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd20}; // codeword = 00000000011011 , run = 0, level = 20
|
536 |
|
|
16'b00000000011010xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd21}; // codeword = 00000000011010 , run = 0, level = 21
|
537 |
|
|
16'b00000000011001xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd22}; // codeword = 00000000011001 , run = 0, level = 22
|
538 |
|
|
16'b00000000011000xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd23}; // codeword = 00000000011000 , run = 0, level = 23
|
539 |
|
|
16'b00000000010111xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd24}; // codeword = 00000000010111 , run = 0, level = 24
|
540 |
|
|
16'b00000000010110xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd25}; // codeword = 00000000010110 , run = 0, level = 25
|
541 |
|
|
16'b00000000010101xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd26}; // codeword = 00000000010101 , run = 0, level = 26
|
542 |
|
|
16'b00000000010100xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd27}; // codeword = 00000000010100 , run = 0, level = 27
|
543 |
|
|
16'b00000000010011xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd28}; // codeword = 00000000010011 , run = 0, level = 28
|
544 |
|
|
16'b00000000010010xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd29}; // codeword = 00000000010010 , run = 0, level = 29
|
545 |
|
|
16'b00000000010001xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd30}; // codeword = 00000000010001 , run = 0, level = 30
|
546 |
|
|
16'b00000000010000xx: dct_coefficient_1_dec = {5'd15, 5'd00, 6'd31}; // codeword = 00000000010000 , run = 0, level = 31
|
547 |
|
|
16'b0000000010110xxx: dct_coefficient_1_dec = {5'd14, 5'd01, 6'd06}; // codeword = 0000000010110 , run = 1, level = 6
|
548 |
|
|
16'b0000000010101xxx: dct_coefficient_1_dec = {5'd14, 5'd01, 6'd07}; // codeword = 0000000010101 , run = 1, level = 7
|
549 |
|
|
16'b0000000010100xxx: dct_coefficient_1_dec = {5'd14, 5'd02, 6'd05}; // codeword = 0000000010100 , run = 2, level = 5
|
550 |
|
|
16'b0000000010011xxx: dct_coefficient_1_dec = {5'd14, 5'd03, 6'd04}; // codeword = 0000000010011 , run = 3, level = 4
|
551 |
|
|
16'b0000000010010xxx: dct_coefficient_1_dec = {5'd14, 5'd05, 6'd03}; // codeword = 0000000010010 , run = 5, level = 3
|
552 |
|
|
16'b0000000010001xxx: dct_coefficient_1_dec = {5'd14, 5'd09, 6'd02}; // codeword = 0000000010001 , run = 9, level = 2
|
553 |
|
|
16'b0000000010000xxx: dct_coefficient_1_dec = {5'd14, 5'd10, 6'd02}; // codeword = 0000000010000 , run = 10, level = 2
|
554 |
|
|
16'b0000000011111xxx: dct_coefficient_1_dec = {5'd14, 5'd22, 6'd01}; // codeword = 0000000011111 , run = 22, level = 1
|
555 |
|
|
16'b0000000011110xxx: dct_coefficient_1_dec = {5'd14, 5'd23, 6'd01}; // codeword = 0000000011110 , run = 23, level = 1
|
556 |
|
|
16'b0000000011101xxx: dct_coefficient_1_dec = {5'd14, 5'd24, 6'd01}; // codeword = 0000000011101 , run = 24, level = 1
|
557 |
|
|
16'b0000000011100xxx: dct_coefficient_1_dec = {5'd14, 5'd25, 6'd01}; // codeword = 0000000011100 , run = 25, level = 1
|
558 |
|
|
16'b0000000011011xxx: dct_coefficient_1_dec = {5'd14, 5'd26, 6'd01}; // codeword = 0000000011011 , run = 26, level = 1
|
559 |
|
|
16'b000000011100xxxx: dct_coefficient_1_dec = {5'd13, 5'd03, 6'd03}; // codeword = 000000011100 , run = 3, level = 3
|
560 |
|
|
16'b000000010010xxxx: dct_coefficient_1_dec = {5'd13, 5'd04, 6'd03}; // codeword = 000000010010 , run = 4, level = 3
|
561 |
|
|
16'b000000011110xxxx: dct_coefficient_1_dec = {5'd13, 5'd06, 6'd02}; // codeword = 000000011110 , run = 6, level = 2
|
562 |
|
|
16'b000000010101xxxx: dct_coefficient_1_dec = {5'd13, 5'd07, 6'd02}; // codeword = 000000010101 , run = 7, level = 2
|
563 |
|
|
16'b000000010001xxxx: dct_coefficient_1_dec = {5'd13, 5'd08, 6'd02}; // codeword = 000000010001 , run = 8, level = 2
|
564 |
|
|
16'b000000011111xxxx: dct_coefficient_1_dec = {5'd13, 5'd17, 6'd01}; // codeword = 000000011111 , run = 17, level = 1
|
565 |
|
|
16'b000000011010xxxx: dct_coefficient_1_dec = {5'd13, 5'd18, 6'd01}; // codeword = 000000011010 , run = 18, level = 1
|
566 |
|
|
16'b000000011001xxxx: dct_coefficient_1_dec = {5'd13, 5'd19, 6'd01}; // codeword = 000000011001 , run = 19, level = 1
|
567 |
|
|
16'b000000010111xxxx: dct_coefficient_1_dec = {5'd13, 5'd20, 6'd01}; // codeword = 000000010111 , run = 20, level = 1
|
568 |
|
|
16'b000000010110xxxx: dct_coefficient_1_dec = {5'd13, 5'd21, 6'd01}; // codeword = 000000010110 , run = 21, level = 1
|
569 |
|
|
16'b0000001101xxxxxx: dct_coefficient_1_dec = {5'd11, 5'd16, 6'd01}; // codeword = 0000001101 , run = 16, level = 1
|
570 |
|
|
16'b0000001100xxxxxx: dct_coefficient_1_dec = {5'd11, 5'd02, 6'd04}; // codeword = 0000001100 , run = 2, level = 4
|
571 |
|
|
16'b000000100xxxxxxx: dct_coefficient_1_dec = {5'd10, 5'd05, 6'd02}; // codeword = 000000100 , run = 5, level = 2
|
572 |
|
|
16'b000000101xxxxxxx: dct_coefficient_1_dec = {5'd10, 5'd14, 6'd01}; // codeword = 000000101 , run = 14, level = 1
|
573 |
|
|
16'b000000111xxxxxxx: dct_coefficient_1_dec = {5'd10, 5'd15, 6'd01}; // codeword = 000000111 , run = 15, level = 1
|
574 |
|
|
16'b00100110xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd03, 6'd02}; // codeword = 00100110 , run = 3, level = 2
|
575 |
|
|
16'b00100001xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd11, 6'd01}; // codeword = 00100001 , run = 11, level = 1
|
576 |
|
|
16'b00100101xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd12, 6'd01}; // codeword = 00100101 , run = 12, level = 1
|
577 |
|
|
16'b00100100xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd13, 6'd01}; // codeword = 00100100 , run = 13, level = 1
|
578 |
|
|
16'b00100111xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd01, 6'd04}; // codeword = 00100111 , run = 1, level = 4
|
579 |
|
|
16'b11111100xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd02, 6'd03}; // codeword = 11111100 , run = 2, level = 3
|
580 |
|
|
16'b11111101xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd04, 6'd02}; // codeword = 11111101 , run = 4, level = 2
|
581 |
|
|
16'b00100011xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd10}; // codeword = 00100011 , run = 0, level = 10
|
582 |
|
|
16'b00100010xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd11}; // codeword = 00100010 , run = 0, level = 11
|
583 |
|
|
16'b00100000xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd01, 6'd05}; // codeword = 00100000 , run = 1, level = 5
|
584 |
|
|
16'b11111010xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd12}; // codeword = 11111010 , run = 0, level = 12
|
585 |
|
|
16'b11111011xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd13}; // codeword = 11111011 , run = 0, level = 13
|
586 |
|
|
16'b11111110xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd14}; // codeword = 11111110 , run = 0, level = 14
|
587 |
|
|
16'b11111111xxxxxxxx: dct_coefficient_1_dec = {5'd09, 5'd00, 6'd15}; // codeword = 11111111 , run = 0, level = 15
|
588 |
|
|
16'b0000110xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd06, 6'd01}; // codeword = 0000110 , run = 6, level = 1
|
589 |
|
|
16'b0000100xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd07, 6'd01}; // codeword = 0000100 , run = 7, level = 1
|
590 |
|
|
16'b0000111xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd02, 6'd02}; // codeword = 0000111 , run = 2, level = 2
|
591 |
|
|
16'b0000101xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd08, 6'd01}; // codeword = 0000101 , run = 8, level = 1
|
592 |
|
|
16'b1111000xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd09, 6'd01}; // codeword = 1111000 , run = 9, level = 1
|
593 |
|
|
16'b1111001xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd01, 6'd03}; // codeword = 1111001 , run = 1, level = 3
|
594 |
|
|
16'b1111010xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd10, 6'd01}; // codeword = 1111010 , run = 10, level = 1
|
595 |
|
|
16'b1111011xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd00, 6'd08}; // codeword = 1111011 , run = 0, level = 8
|
596 |
|
|
16'b1111100xxxxxxxxx: dct_coefficient_1_dec = {5'd08, 5'd00, 6'd09}; // codeword = 1111100 , run = 0, level = 9
|
597 |
|
|
16'b000110xxxxxxxxxx: dct_coefficient_1_dec = {5'd07, 5'd04, 6'd01}; // codeword = 000110 , run = 4, level = 1
|
598 |
|
|
16'b000111xxxxxxxxxx: dct_coefficient_1_dec = {5'd07, 5'd05, 6'd01}; // codeword = 000111 , run = 5, level = 1
|
599 |
|
|
16'b000001xxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd00, 6'd00}; // codeword = 000001 , escape (no sign bit)
|
600 |
|
|
16'b000101xxxxxxxxxx: dct_coefficient_1_dec = {5'd07, 5'd00, 6'd06}; // codeword = 000101 , run = 0, level = 6
|
601 |
|
|
16'b000100xxxxxxxxxx: dct_coefficient_1_dec = {5'd07, 5'd00, 6'd07}; // codeword = 000100 , run = 0, level = 7
|
602 |
|
|
16'b00101xxxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd02, 6'd01}; // codeword = 00101 , run = 2, level = 1
|
603 |
|
|
16'b00111xxxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd03, 6'd01}; // codeword = 00111 , run = 3, level = 1
|
604 |
|
|
16'b00110xxxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd01, 6'd02}; // codeword = 00110 , run = 1, level = 2
|
605 |
|
|
16'b11100xxxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd00, 6'd04}; // codeword = 11100 , run = 0, level = 4
|
606 |
|
|
16'b11101xxxxxxxxxxx: dct_coefficient_1_dec = {5'd06, 5'd00, 6'd05}; // codeword = 11101 , run = 0, level = 5
|
607 |
|
|
16'b0110xxxxxxxxxxxx: dct_coefficient_1_dec = {5'd04, 5'd00, 6'd00}; // codeword = 0110 , end of block (no sign bit)
|
608 |
|
|
16'b0111xxxxxxxxxxxx: dct_coefficient_1_dec = {5'd05, 5'd00, 6'd03}; // codeword = 0111 , run = 0, level = 3
|
609 |
|
|
16'b010xxxxxxxxxxxxx: dct_coefficient_1_dec = {5'd04, 5'd01, 6'd01}; // codeword = 010 , run = 1, level = 1
|
610 |
|
|
16'b110xxxxxxxxxxxxx: dct_coefficient_1_dec = {5'd04, 5'd00, 6'd02}; // codeword = 110 , run = 0, level = 2
|
611 |
|
|
16'b10xxxxxxxxxxxxxx: dct_coefficient_1_dec = {5'd03, 5'd00, 6'd01}; // codeword = 10 , run = 0, level = 1
|
612 |
|
|
default dct_coefficient_1_dec = {5'd00, 5'd00, 6'd00}; // Error
|
613 |
|
|
endcase
|
614 |
|
|
end
|
615 |
|
|
endfunction
|
616 |
|
|
/* not truncated */
|