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///////////////////////////////////////////////////////////////////// //// //// //// JPEG Entropy Coding, Huffman tables //// //// //// //// These functions contain the default huffman tables as //// //// described in ITU-T.81 (ISO/IEC-10918-1) Annex K. //// //// //// //// Author: Richard Herveille //// //// richard@asics.ws //// //// www.asics.ws //// //// //// ///////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2001 Richard Herveille //// //// richard@asics.ws //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer.//// //// //// //// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY //// //// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED //// //// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS //// //// FOR A PARTICULAR PURPOSE. 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. //// //// //// ///////////////////////////////////////////////////////////////////// // CVS Log // // $Id: huffman_tables.v,v 1.2 2002-10-31 12:50:40 rherveille Exp $ // // $Date: 2002-10-31 12:50:40 $ // $Revision: 1.2 $ // $Author: rherveille $ // $Locker: $ // $State: Exp $ // /* *********************** */ /* *** E N C O D I N G *** */ /* *********************** */ /* J P E G _ D C _ L U M I N A N C E _ H U F F M A N _ E N C ITU-T.81 annex K.3.1 Table K.3 This function translates the luminance DC coefficient difference into the default huffman codeword. Output is given as: codelength[3:0]-1, codeword[8:0] The codewords are right-alligned to ease bitstream generation. example: dc_luminance_coefficient = 3 codelength = 2 +1 = 3 codeword = 9'b0_0000_0100 => 3'b100 */ function [12:0] jpeg_dc_luminance_huffman_enc; input [ 3:0] dc_luminance_coefficient; begin case(dc_luminance_coefficient) // synopsys full_case parallel_case 4'h0: jpeg_dc_luminance_huffman_enc = {4'h1, 9'b0_0000_0000}; 4'h1: jpeg_dc_luminance_huffman_enc = {4'h2, 9'b0_0000_0010}; 4'h2: jpeg_dc_luminance_huffman_enc = {4'h2, 9'b0_0000_0011}; 4'h3: jpeg_dc_luminance_huffman_enc = {4'h2, 9'b0_0000_0100}; 4'h4: jpeg_dc_luminance_huffman_enc = {4'h2, 9'b0_0000_0101}; 4'h5: jpeg_dc_luminance_huffman_enc = {4'h2, 9'b0_0000_0110}; 4'h6: jpeg_dc_luminance_huffman_enc = {4'h3, 9'b0_0000_1110}; 4'h7: jpeg_dc_luminance_huffman_enc = {4'h4, 9'b0_0001_1110}; 4'h8: jpeg_dc_luminance_huffman_enc = {4'h5, 9'b0_0011_1110}; 4'h9: jpeg_dc_luminance_huffman_enc = {4'h6, 9'b0_0111_1110}; 4'ha: jpeg_dc_luminance_huffman_enc = {4'h7, 9'b0_1111_1110}; 4'hb: jpeg_dc_luminance_huffman_enc = {4'h8, 9'b1_1111_1110}; endcase end endfunction // jpeg_dc_luminance_huffman_enc /* J P E G _ D C _ C H R O M I N A N C E _ H U F F M A N _ E N C ITU-T.81 annex K.3.1 Table K.4 This function translates the chrominance DC coefficient difference into the default huffman codeword. Output is given as: codelength[3:0]-1, codeword[10:0] The codewords are right-alligned to ease bitstream generation. example: dc_chrominance_coefficient = 3 codelength = 2 +1 = 3 codeword = 11'b0_0000_0110 => 3'b110 */ function [14:0] jpeg_dc_chrominance_huffman_enc; input [ 3:0] dc_chrominance_coefficient; begin case(dc_chrominance_coefficient) // synopsys full_case parallel_case 4'h0: jpeg_dc_chrominance_huffman_enc = {4'h1, 11'b000_0000_0000}; 4'h1: jpeg_dc_chrominance_huffman_enc = {4'h1, 11'b000_0000_0001}; 4'h2: jpeg_dc_chrominance_huffman_enc = {4'h1, 11'b000_0000_0010}; 4'h3: jpeg_dc_chrominance_huffman_enc = {4'h2, 11'b000_0000_0110}; 4'h4: jpeg_dc_chrominance_huffman_enc = {4'h3, 11'b000_0000_1110}; 4'h5: jpeg_dc_chrominance_huffman_enc = {4'h4, 11'b000_0001_1110}; 4'h6: jpeg_dc_chrominance_huffman_enc = {4'h5, 11'b000_0011_1110}; 4'h7: jpeg_dc_chrominance_huffman_enc = {4'h6, 11'b000_0111_1110}; 4'h8: jpeg_dc_chrominance_huffman_enc = {4'h7, 11'b000_1111_1110}; 4'h9: jpeg_dc_chrominance_huffman_enc = {4'h8, 11'b001_1111_1110}; 4'ha: jpeg_dc_chrominance_huffman_enc = {4'h9, 11'b011_1111_1110}; 4'hb: jpeg_dc_chrominance_huffman_enc = {4'ha, 11'b111_1111_1110}; endcase end endfunction // jpeg_dc_chrominance_huffman_enc /* J P E G _ A C _ L U M I N A N C E _ H U F F M A N _ E N C ITU-T.81 annex K.3.2 Table K.5 This function translates the luminance AC (RunLength, Size) codepair into the default huffman codeword. Output is given as: codelength[3:0]-1, codeword[15:0] The codewords are right-alligned to ease bitstream generation. example: ac_luminance_run_length = 3 ac_limunance_size (category) = 2 codelength = 8 +1 = 9 codeword = 16'b0000_0001_1111_0111 => 9'b1_1111_0111 */ function [19:0] jpeg_ac_luminance_huffman_enc; input [ 3:0] run_length; // category input [ 3:0] size; begin case( {run_length, size} ) // synopsys full_case parallel_case 8'h00: jpeg_ac_luminance_huffman_enc = {4'h3, 16'b0000_0000_0000_1010}; // EOB 8'h01: jpeg_ac_luminance_huffman_enc = {4'h1, 16'b0000_0000_0000_0000}; 8'h02: jpeg_ac_luminance_huffman_enc = {4'h1, 16'b0000_0000_0000_0001}; 8'h03: jpeg_ac_luminance_huffman_enc = {4'h2, 16'b0000_0000_0000_0100}; 8'h04: jpeg_ac_luminance_huffman_enc = {4'h3, 16'b0000_0000_0000_1011}; 8'h05: jpeg_ac_luminance_huffman_enc = {4'h4, 16'b0000_0000_0001_1010}; 8'h06: jpeg_ac_luminance_huffman_enc = {4'h6, 16'b0000_0000_0111_1000}; 8'h07: jpeg_ac_luminance_huffman_enc = {4'h7, 16'b0000_0000_1111_1000}; 8'h08: jpeg_ac_luminance_huffman_enc = {4'h9, 16'b0000_0011_1111_0110}; 8'h09: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0010}; 8'h0a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0011}; 8'h11: jpeg_ac_luminance_huffman_enc = {4'h3, 16'b0000_0000_0000_1100}; 8'h12: jpeg_ac_luminance_huffman_enc = {4'h4, 16'b0000_0000_0001_1011}; 8'h13: jpeg_ac_luminance_huffman_enc = {4'h6, 16'b0000_0000_0111_1001}; 8'h14: jpeg_ac_luminance_huffman_enc = {4'h8, 16'b0000_0001_1111_0110}; 8'h15: jpeg_ac_luminance_huffman_enc = {4'ha, 16'b0000_0111_1111_0110}; 8'h16: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0100}; 8'h17: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0101}; 8'h18: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0110}; 8'h19: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_0111}; 8'h1a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1000}; 8'h21: jpeg_ac_luminance_huffman_enc = {4'h4, 16'b0000_0000_0001_1100}; 8'h22: jpeg_ac_luminance_huffman_enc = {4'h7, 16'b0000_0000_1111_1001}; 8'h23: jpeg_ac_luminance_huffman_enc = {4'h9, 16'b0000_0011_1111_0111}; 8'h24: jpeg_ac_luminance_huffman_enc = {4'hb, 16'b0000_1111_1111_0100}; 8'h25: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1001}; 8'h26: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1010}; 8'h27: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1011}; 8'h28: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1100}; 8'h29: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1101}; 8'h2a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1110}; 8'h31: jpeg_ac_luminance_huffman_enc = {4'h5, 16'b0000_0000_0011_1010}; 8'h32: jpeg_ac_luminance_huffman_enc = {4'h8, 16'b0000_0001_1111_0111}; 8'h33: jpeg_ac_luminance_huffman_enc = {4'hb, 16'b0000_1111_1111_0101}; 8'h34: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1000_1111}; 8'h35: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0000}; 8'h36: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0001}; 8'h37: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0010}; 8'h38: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0011}; 8'h39: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0100}; 8'h3a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0101}; 8'h41: jpeg_ac_luminance_huffman_enc = {4'h5, 16'b0000_0000_0011_1011}; 8'h42: jpeg_ac_luminance_huffman_enc = {4'h9, 16'b0000_0011_1111_1000}; 8'h43: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0110}; 8'h44: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_0111}; 8'h45: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1000}; 8'h46: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1001}; 8'h47: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1010}; 8'h48: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1011}; 8'h49: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1100}; 8'h4a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1101}; 8'h51: jpeg_ac_luminance_huffman_enc = {4'h6, 16'b0000_0000_0111_1010}; 8'h52: jpeg_ac_luminance_huffman_enc = {4'ha, 16'b0000_0111_1111_0111}; 8'h53: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1110}; 8'h54: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1001_1111}; 8'h55: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0000}; 8'h56: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0001}; 8'h57: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0010}; 8'h58: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0011}; 8'h59: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0100}; 8'h5a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0101}; 8'h61: jpeg_ac_luminance_huffman_enc = {4'h6, 16'b0000_0000_0111_1011}; 8'h62: jpeg_ac_luminance_huffman_enc = {4'hb, 16'b0000_1111_1111_0110}; 8'h63: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0110}; 8'h64: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_0111}; 8'h65: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1000}; 8'h66: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1001}; 8'h67: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1010}; 8'h68: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1011}; 8'h69: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1100}; 8'h6a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1101}; 8'h71: jpeg_ac_luminance_huffman_enc = {4'h7, 16'b0000_0000_1111_1010}; 8'h72: jpeg_ac_luminance_huffman_enc = {4'hb, 16'b0000_1111_1111_0111}; 8'h73: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1110}; 8'h74: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1010_1111}; 8'h75: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0000}; 8'h76: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0001}; 8'h77: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0010}; 8'h78: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0011}; 8'h79: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0100}; 8'h7a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0101}; 8'h81: jpeg_ac_luminance_huffman_enc = {4'h8, 16'b0000_0001_1111_1000}; 8'h82: jpeg_ac_luminance_huffman_enc = {4'he, 16'b0111_1111_1100_0000}; 8'h83: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0110}; 8'h84: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_0111}; 8'h85: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1000}; 8'h86: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1001}; 8'h87: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1010}; 8'h88: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1011}; 8'h89: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1100}; 8'h8a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1101}; 8'h91: jpeg_ac_luminance_huffman_enc = {4'h8, 16'b0000_0001_1111_1001}; 8'h92: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1110}; 8'h93: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1011_1111}; 8'h94: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0000}; 8'h95: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0001}; 8'h96: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0010}; 8'h97: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0011}; 8'h98: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0100}; 8'h99: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0101}; 8'h9a: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0110}; 8'ha1: jpeg_ac_luminance_huffman_enc = {4'h8, 16'b0000_0001_1111_1010}; 8'ha2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_0111}; 8'ha3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1000}; 8'ha4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1001}; 8'ha5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1010}; 8'ha6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1011}; 8'ha7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1100}; 8'ha8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1101}; 8'ha9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1110}; 8'haa: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1100_1111}; 8'hb1: jpeg_ac_luminance_huffman_enc = {4'h9, 16'b0000_0011_1111_1001}; 8'hb2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0000}; 8'hb3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0001}; 8'hb4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0010}; 8'hb5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0011}; 8'hb6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0100}; 8'hb7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0101}; 8'hb8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0110}; 8'hb9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_0111}; 8'hba: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1000}; 8'hc1: jpeg_ac_luminance_huffman_enc = {4'h9, 16'b0000_0011_1111_1010}; 8'hc2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1001}; 8'hc3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1010}; 8'hc4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1011}; 8'hc5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1100}; 8'hc6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1101}; 8'hc7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1110}; 8'hc8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1101_1111}; 8'hc9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0000}; 8'hca: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0001}; 8'hd1: jpeg_ac_luminance_huffman_enc = {4'ha, 16'b0000_0111_1111_1000}; 8'hd2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0010}; 8'hd3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0011}; 8'hd4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0100}; 8'hd5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0101}; 8'hd6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0110}; 8'hd7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_0111}; 8'hd8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1000}; 8'hd9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1001}; 8'hda: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1010}; 8'he1: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1011}; 8'he2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1100}; 8'he3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1101}; 8'he4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1110}; 8'he5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1110_1111}; 8'he6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0000}; 8'he7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0001}; 8'he8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0010}; 8'he9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0011}; 8'hea: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0100}; 8'hf0: jpeg_ac_luminance_huffman_enc = {4'ha, 16'b0000_0111_1111_1001}; // ZRL 8'hf1: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0101}; 8'hf2: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0110}; 8'hf3: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_0111}; 8'hf4: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1000}; 8'hf5: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1001}; 8'hf6: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1010}; 8'hf7: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1011}; 8'hf8: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1100}; 8'hf9: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1101}; 8'hfa: jpeg_ac_luminance_huffman_enc = {4'hf, 16'b1111_1111_1111_1110}; endcase end endfunction // jpeg_ac_luminance_huffman_enc /* J P E G _ A C _ C H R O M I N A N C E _ H U F F M A N _ E N C ITU-T.81 annex K.3.2 Table K.6 This function translates the chrominance AC (RunLength, Size) codepair into the default huffman codeword. Output is given as: codelength[3:0]-1, codeword[15:0] The codewords are right-alligned to ease bitstream generation. example: ac_luminance_run_length = 2 ac_limunance_size (category) = 5 codelength = e +1 = 15(dec) codeword = 16'b0111_1111_1100_0010 => 15'b0111_1111_1100_0010 */ function [19:0] jpeg_ac_chrominance_huffman_enc; input [ 3:0] run_length; // category input [ 3:0] size; begin case( {run_length, size} ) // synopsys full_case parallel_case 8'h00: jpeg_ac_chrominance_huffman_enc = {4'h1, 16'b0000_0000_0000_0000}; // EOB 8'h01: jpeg_ac_chrominance_huffman_enc = {4'h1, 16'b0000_0000_0000_0001}; 8'h02: jpeg_ac_chrominance_huffman_enc = {4'h2, 16'b0000_0000_0000_0100}; 8'h03: jpeg_ac_chrominance_huffman_enc = {4'h3, 16'b0000_0000_0000_1010}; 8'h04: jpeg_ac_chrominance_huffman_enc = {4'h4, 16'b0000_0000_0001_1000}; 8'h05: jpeg_ac_chrominance_huffman_enc = {4'h4, 16'b0000_0000_0001_1001}; 8'h06: jpeg_ac_chrominance_huffman_enc = {4'h5, 16'b0000_0000_0011_1000}; 8'h07: jpeg_ac_chrominance_huffman_enc = {4'h6, 16'b0000_0000_0111_1000}; 8'h08: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_0100}; 8'h09: jpeg_ac_chrominance_huffman_enc = {4'h9, 16'b0000_0011_1111_0110}; 8'h0a: jpeg_ac_chrominance_huffman_enc = {4'hb, 16'b0000_1111_1111_0100}; 8'h11: jpeg_ac_chrominance_huffman_enc = {4'h3, 16'b0000_0000_0000_1011}; 8'h12: jpeg_ac_chrominance_huffman_enc = {4'h5, 16'b0000_0000_0011_1001}; 8'h13: jpeg_ac_chrominance_huffman_enc = {4'h7, 16'b0000_0000_1111_0110}; 8'h14: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_0101}; 8'h15: jpeg_ac_chrominance_huffman_enc = {4'ha, 16'b0000_0111_1111_0110}; 8'h16: jpeg_ac_chrominance_huffman_enc = {4'hb, 16'b0000_1111_1111_0101}; 8'h17: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1000}; 8'h18: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1001}; 8'h19: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1010}; 8'h1a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1011}; 8'h21: jpeg_ac_chrominance_huffman_enc = {4'h4, 16'b0000_0000_0001_1010}; 8'h22: jpeg_ac_chrominance_huffman_enc = {4'h7, 16'b0000_0000_1111_0111}; 8'h23: jpeg_ac_chrominance_huffman_enc = {4'h9, 16'b0000_0011_1111_0111}; 8'h24: jpeg_ac_chrominance_huffman_enc = {4'hb, 16'b0000_1111_1111_0110}; 8'h25: jpeg_ac_chrominance_huffman_enc = {4'he, 16'b0111_1111_1100_0010}; 8'h26: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1100}; 8'h27: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1101}; 8'h28: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1110}; 8'h29: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1000_1111}; 8'h2a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0000}; 8'h31: jpeg_ac_chrominance_huffman_enc = {4'h4, 16'b0000_0000_0001_1011}; 8'h32: jpeg_ac_chrominance_huffman_enc = {4'h7, 16'b0000_0000_1111_1000}; 8'h33: jpeg_ac_chrominance_huffman_enc = {4'h9, 16'b0000_0011_1111_1000}; 8'h34: jpeg_ac_chrominance_huffman_enc = {4'hb, 16'b0000_1111_1111_0111}; 8'h35: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0001}; 8'h36: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0010}; 8'h37: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0011}; 8'h38: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0100}; 8'h39: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0101}; 8'h3a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0110}; 8'h41: jpeg_ac_chrominance_huffman_enc = {4'h5, 16'b0000_0000_0011_1010}; 8'h42: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_0110}; 8'h43: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_0111}; 8'h44: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1000}; 8'h45: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1001}; 8'h46: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1010}; 8'h47: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1011}; 8'h48: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1100}; 8'h49: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1101}; 8'h4a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1110}; 8'h51: jpeg_ac_chrominance_huffman_enc = {4'h5, 16'b0000_0000_0011_1011}; 8'h52: jpeg_ac_chrominance_huffman_enc = {4'h9, 16'b0000_0011_1111_1001}; 8'h53: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1001_1111}; 8'h54: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0000}; 8'h55: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0001}; 8'h56: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0010}; 8'h57: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0011}; 8'h58: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0100}; 8'h59: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0101}; 8'h5a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0110}; 8'h61: jpeg_ac_chrominance_huffman_enc = {4'h6, 16'b0000_0000_0111_1001}; 8'h62: jpeg_ac_chrominance_huffman_enc = {4'ha, 16'b0000_0111_1111_0111}; 8'h63: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_0111}; 8'h64: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1000}; 8'h65: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1001}; 8'h66: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1010}; 8'h67: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1011}; 8'h68: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1100}; 8'h69: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1101}; 8'h6a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1110}; 8'h71: jpeg_ac_chrominance_huffman_enc = {4'h6, 16'b0000_0000_0111_1010}; 8'h72: jpeg_ac_chrominance_huffman_enc = {4'ha, 16'b0000_0111_1111_1000}; 8'h73: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1010_1111}; 8'h74: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0000}; 8'h75: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0001}; 8'h76: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0010}; 8'h77: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0011}; 8'h78: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0100}; 8'h79: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0101}; 8'h7a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0110}; 8'h81: jpeg_ac_chrominance_huffman_enc = {4'h7, 16'b0000_0000_1111_1001}; 8'h82: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_0111}; 8'h83: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1000}; 8'h84: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1001}; 8'h85: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1010}; 8'h86: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1011}; 8'h87: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1100}; 8'h88: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1101}; 8'h89: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1110}; 8'h8a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1011_1111}; 8'h91: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_0111}; 8'h92: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0000}; 8'h93: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0001}; 8'h94: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0010}; 8'h95: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0011}; 8'h96: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0100}; 8'h97: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0101}; 8'h98: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0110}; 8'h99: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_0111}; 8'h9a: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1000}; 8'ha1: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_1000}; 8'ha2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1001}; 8'ha3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1010}; 8'ha4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1011}; 8'ha5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1100}; 8'ha6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1101}; 8'ha7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1110}; 8'ha8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1100_1111}; 8'ha9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0000}; 8'haa: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0001}; 8'hb1: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_1001}; 8'hb2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0010}; 8'hb3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0011}; 8'hb4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0100}; 8'hb5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0101}; 8'hb6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0110}; 8'hb7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_0111}; 8'hb8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1000}; 8'hb9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1001}; 8'hba: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1010}; 8'hc1: jpeg_ac_chrominance_huffman_enc = {4'h8, 16'b0000_0001_1111_1010}; 8'hc2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1011}; 8'hc3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1100}; 8'hc4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1101}; 8'hc5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1110}; 8'hc6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1101_1111}; 8'hc7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0000}; 8'hc8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0001}; 8'hc9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0010}; 8'hca: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0011}; 8'hd1: jpeg_ac_chrominance_huffman_enc = {4'ha, 16'b0000_0111_1111_1001}; 8'hd2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0100}; 8'hd3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0101}; 8'hd4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0110}; 8'hd5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_0111}; 8'hd6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1000}; 8'hd7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1001}; 8'hd8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1010}; 8'hd9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1011}; 8'hda: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1100}; 8'he1: jpeg_ac_chrominance_huffman_enc = {4'hd, 16'b0011_1111_1110_0000}; 8'he2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1101}; 8'he3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1110}; 8'he4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1110_1111}; 8'he5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0000}; 8'he6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0001}; 8'he7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0010}; 8'he8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0011}; 8'he9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0100}; 8'hea: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0101}; 8'hf0: jpeg_ac_chrominance_huffman_enc = {4'h9, 16'b0000_0011_1111_1010}; // ZRL 8'hf1: jpeg_ac_chrominance_huffman_enc = {4'he, 16'b0111_1111_1100_0011}; 8'hf2: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0110}; 8'hf3: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_0111}; 8'hf4: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1000}; 8'hf5: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1001}; 8'hf6: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1010}; 8'hf7: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1011}; 8'hf8: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1100}; 8'hf9: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1101}; 8'hfa: jpeg_ac_chrominance_huffman_enc = {4'hf, 16'b1111_1111_1111_1110}; endcase end endfunction // jpeg_ac_chrominance_huffman_enc /* *********************** */ /* *** D E C O D I N G *** */ /* *********************** */ /* J P E G _ D C _ L U M I N A N C E _ H U F F M A N _ D E C ITU-T.81 annex K.3.1 Table K.3 This function translates the default Huffman codeword into the luminance DC coefficient difference category. Output is given as: codelength[3:0]-1, category[3:0] The codewords are left-alligned to ease bitstream decomposition. example: codeword = 9'b1_0011_010 codelength = 2 +1 = 3 category = 3 */ function [7:0] jpeg_dc_luminance_huffman_dec; input [8:0] codeword; begin casex(codeword) // synopsys full_case parallel_case 9'b0_0???_????: jpeg_dc_luminance_huffman_dec = {4'h1, 4'h0}; 9'b0_10??_????: jpeg_dc_luminance_huffman_dec = {4'h2, 4'h1}; 9'b0_11??_????: jpeg_dc_luminance_huffman_dec = {4'h2, 4'h2}; 9'b1_00??_????: jpeg_dc_luminance_huffman_dec = {4'h2, 4'h3}; 9'b1_01??_????: jpeg_dc_luminance_huffman_dec = {4'h2, 4'h4}; 9'b1_10??_????: jpeg_dc_luminance_huffman_dec = {4'h2, 4'h5}; 9'b1_110?_????: jpeg_dc_luminance_huffman_dec = {4'h3, 4'h6}; 9'b1_1110_????: jpeg_dc_luminance_huffman_dec = {4'h4, 4'h7}; 9'b1_1111_0???: jpeg_dc_luminance_huffman_dec = {4'h5, 4'h8}; 9'b1_1111_10??: jpeg_dc_luminance_huffman_dec = {4'h6, 4'h9}; 9'b1_1111_110?: jpeg_dc_luminance_huffman_dec = {4'h7, 4'ha}; 9'b1_1111_1110: jpeg_dc_luminance_huffman_dec = {4'h8, 4'hb}; endcase end endfunction // jpeg_dc_luminance_huffman_dec /* J P E G _ D C _ C H R O M I N A N C E _ H U F F M A N _ D E C ITU-T.81 annex K.3.1 Table K.4 This function translates the default Huffman codeword into the chrominance DC coefficient difference. Output is given as: codelength[3:0]-1, category [3:0] The codewords are left-alligned to ease bitstream decomposition. example: dc_chrominance_coefficient = 3 codelength = 2 +1 = 3 codeword = 11'b0_0000_0110 => 3'b110 */ function [7:0] jpeg_dc_chrominance_huffman_dec; input [10:0] codeword; begin casex(codeword) // synopsys full_case parallel_case 11'b00?_????_????: jpeg_dc_chrominance_huffman_dec = {4'h1, 4'h0}; 11'b01?_????_????: jpeg_dc_chrominance_huffman_dec = {4'h1, 4'h1}; 11'b10?_????_????: jpeg_dc_chrominance_huffman_dec = {4'h1, 4'h2}; 11'b110_????_????: jpeg_dc_chrominance_huffman_dec = {4'h2, 4'h3}; 11'b111_0???_????: jpeg_dc_chrominance_huffman_dec = {4'h3, 4'h4}; 11'b111_10??_????: jpeg_dc_chrominance_huffman_dec = {4'h4, 4'h5}; 11'b111_110?_????: jpeg_dc_chrominance_huffman_dec = {4'h5, 4'h6}; 11'b111_1110_????: jpeg_dc_chrominance_huffman_dec = {4'h6, 4'h7}; 11'b111_1111_0???: jpeg_dc_chrominance_huffman_dec = {4'h7, 4'h8}; 11'b111_1111_10??: jpeg_dc_chrominance_huffman_dec = {4'h8, 4'h9}; 11'b111_1111_110?: jpeg_dc_chrominance_huffman_dec = {4'h9, 4'ha}; 11'b111_1111_1110: jpeg_dc_chrominance_huffman_dec = {4'ha, 4'hb}; endcase end endfunction // jpeg_dc_chrominance_huffman_dec /* J P E G _ A C _ L U M I N A N C E _ H U F F M A N _ D E C ITU-T.81 annex K.3.2 Table K.5 This function translates the default Huffman codeword into luminance AC (RunLength, Size) codepair. Output is given as: codelength[3:0]-1, RunLength[3:0], size[3:0] The codewords are left-alligned to ease bitstream decomposition. example: codeword = 16'b0000_0001_1111_0111 codelength = 8 +1 = 9 ac_luminance_run_length = 3 ac_limunance_size (category) = 2 */ function [11:0] jpeg_ac_luminance_huffman_dec; input [15:0] codeword; begin casex(codeword) // synopsys full_case parallel_case 16'b1010_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h3, 8'h00}; // EOB 16'b00??_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h1, 8'h01}; 16'b01??_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h1, 8'h02}; 16'b100?_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h2, 8'h03}; 16'b1011_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h3, 8'h04}; 16'b1101_0???_????_????: jpeg_ac_luminance_huffman_dec = {4'h4, 8'h05}; 16'b1111_000?_????_????: jpeg_ac_luminance_huffman_dec = {4'h6, 8'h06}; 16'b1111_1000_????_????: jpeg_ac_luminance_huffman_dec = {4'h7, 8'h07}; 16'b1111_1101_10??_????: jpeg_ac_luminance_huffman_dec = {4'h9, 8'h08}; 16'b1111_1111_1000_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h09}; 16'b1111_1111_1000_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h0a}; 16'b1100_????_????_????: jpeg_ac_luminance_huffman_dec = {4'h3, 8'h11}; 16'b1101_1???_????_????: jpeg_ac_luminance_huffman_dec = {4'h4, 8'h12}; 16'b1111_001?_????_????: jpeg_ac_luminance_huffman_dec = {4'h6, 8'h13}; 16'b1111_1011_0???_????: jpeg_ac_luminance_huffman_dec = {4'h8, 8'h14}; 16'b1111_1110_110?_????: jpeg_ac_luminance_huffman_dec = {4'ha, 8'h15}; 16'b1111_1111_1000_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h16}; 16'b1111_1111_1000_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h17}; 16'b1111_1111_1000_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h18}; 16'b1111_1111_1000_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h19}; 16'b1111_1111_1000_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h1a}; 16'b1110_0???_????_????: jpeg_ac_luminance_huffman_dec = {4'h4, 8'h21}; 16'b1111_1001_????_????: jpeg_ac_luminance_huffman_dec = {4'h7, 8'h22}; 16'b1111_1101_11??_????: jpeg_ac_luminance_huffman_dec = {4'h9, 8'h23}; 16'b1111_1111_0100_????: jpeg_ac_luminance_huffman_dec = {4'hb, 8'h24}; 16'b1111_1111_1000_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h25}; 16'b1111_1111_1000_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h26}; 16'b1111_1111_1000_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h27}; 16'b1111_1111_1000_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h28}; 16'b1111_1111_1000_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h29}; 16'b1111_1111_1000_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h2a}; 16'b1110_10??_????_????: jpeg_ac_luminance_huffman_dec = {4'h5, 8'h31}; 16'b1111_1011_1???_????: jpeg_ac_luminance_huffman_dec = {4'h8, 8'h32}; 16'b1111_1111_0101_????: jpeg_ac_luminance_huffman_dec = {4'hb, 8'h33}; 16'b1111_1111_1000_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h34}; 16'b1111_1111_1001_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h35}; 16'b1111_1111_1001_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h36}; 16'b1111_1111_1001_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h37}; 16'b1111_1111_1001_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h38}; 16'b1111_1111_1001_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h39}; 16'b1111_1111_1001_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h3a}; 16'b1110_11??_????_????: jpeg_ac_luminance_huffman_dec = {4'h5, 8'h41}; 16'b1111_1110_00??_????: jpeg_ac_luminance_huffman_dec = {4'h9, 8'h42}; 16'b1111_1111_1001_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h43}; 16'b1111_1111_1001_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h44}; 16'b1111_1111_1001_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h45}; 16'b1111_1111_1001_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h46}; 16'b1111_1111_1001_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h47}; 16'b1111_1111_1001_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h48}; 16'b1111_1111_1001_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h49}; 16'b1111_1111_1001_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h4a}; 16'b1111_010?_????_????: jpeg_ac_luminance_huffman_dec = {4'h6, 8'h51}; 16'b1111_1110_111?_????: jpeg_ac_luminance_huffman_dec = {4'ha, 8'h52}; 16'b1111_1111_1001_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h53}; 16'b1111_1111_1001_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h54}; 16'b1111_1111_1010_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h55}; 16'b1111_1111_1010_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h56}; 16'b1111_1111_1010_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h57}; 16'b1111_1111_1010_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h58}; 16'b1111_1111_1010_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h59}; 16'b1111_1111_1010_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h5a}; 16'b1111_011?_????_????: jpeg_ac_luminance_huffman_dec = {4'h6, 8'h61}; 16'b1111_1111_0110_????: jpeg_ac_luminance_huffman_dec = {4'hb, 8'h62}; 16'b1111_1111_1010_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h63}; 16'b1111_1111_1010_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h64}; 16'b1111_1111_1010_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h65}; 16'b1111_1111_1010_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h66}; 16'b1111_1111_1010_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h67}; 16'b1111_1111_1010_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h68}; 16'b1111_1111_1010_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h69}; 16'b1111_1111_1010_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h6a}; 16'b1111_1010_????_????: jpeg_ac_luminance_huffman_dec = {4'h7, 8'h71}; 16'b1111_1111_0111_????: jpeg_ac_luminance_huffman_dec = {4'hb, 8'h72}; 16'b1111_1111_1010_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h73}; 16'b1111_1111_1010_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h74}; 16'b1111_1111_1011_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h75}; 16'b1111_1111_1011_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h76}; 16'b1111_1111_1011_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h77}; 16'b1111_1111_1011_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h78}; 16'b1111_1111_1011_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h79}; 16'b1111_1111_1011_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h7a}; 16'b1111_1100_0???_????: jpeg_ac_luminance_huffman_dec = {4'h8, 8'h81}; 16'b1111_1111_1000_000?: jpeg_ac_luminance_huffman_dec = {4'he, 8'h82}; 16'b1111_1111_1011_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h83}; 16'b1111_1111_1011_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h84}; 16'b1111_1111_1011_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h85}; 16'b1111_1111_1011_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h86}; 16'b1111_1111_1011_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h87}; 16'b1111_1111_1011_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h88}; 16'b1111_1111_1011_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h89}; 16'b1111_1111_1011_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h8a}; 16'b1111_1100_1???_????: jpeg_ac_luminance_huffman_dec = {4'h8, 8'h91}; 16'b1111_1111_1011_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h92}; 16'b1111_1111_1011_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h93}; 16'b1111_1111_1100_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h94}; 16'b1111_1111_1100_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h95}; 16'b1111_1111_1100_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h96}; 16'b1111_1111_1100_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h97}; 16'b1111_1111_1100_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h98}; 16'b1111_1111_1100_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h99}; 16'b1111_1111_1100_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'h9a}; 16'b1111_1101_0???_????: jpeg_ac_luminance_huffman_dec = {4'h8, 8'ha1}; 16'b1111_1111_1100_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha2}; 16'b1111_1111_1100_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha3}; 16'b1111_1111_1100_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha4}; 16'b1111_1111_1100_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha5}; 16'b1111_1111_1100_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha6}; 16'b1111_1111_1100_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha7}; 16'b1111_1111_1100_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha8}; 16'b1111_1111_1100_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'ha9}; 16'b1111_1111_1100_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'haa}; 16'b1111_1110_01??_????: jpeg_ac_luminance_huffman_dec = {4'h9, 8'hb1}; 16'b1111_1111_1101_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb2}; 16'b1111_1111_1101_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb3}; 16'b1111_1111_1101_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb4}; 16'b1111_1111_1101_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb5}; 16'b1111_1111_1101_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb6}; 16'b1111_1111_1101_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb7}; 16'b1111_1111_1101_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb8}; 16'b1111_1111_1101_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hb9}; 16'b1111_1111_1101_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hba}; 16'b1111_1110_10??_????: jpeg_ac_luminance_huffman_dec = {4'h9, 8'hc1}; 16'b1111_1111_1101_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc2}; 16'b1111_1111_1101_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc3}; 16'b1111_1111_1101_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc4}; 16'b1111_1111_1101_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc5}; 16'b1111_1111_1101_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc6}; 16'b1111_1111_1101_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc7}; 16'b1111_1111_1101_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc8}; 16'b1111_1111_1110_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hc9}; 16'b1111_1111_1110_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hca}; 16'b1111_1111_000?_????: jpeg_ac_luminance_huffman_dec = {4'ha, 8'hd1}; 16'b1111_1111_1110_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd2}; 16'b1111_1111_1110_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd3}; 16'b1111_1111_1110_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd4}; 16'b1111_1111_1110_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd5}; 16'b1111_1111_1110_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd6}; 16'b1111_1111_1110_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd7}; 16'b1111_1111_1110_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd8}; 16'b1111_1111_1110_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hd9}; 16'b1111_1111_1110_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hda}; 16'b1111_1111_1110_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he1}; 16'b1111_1111_1110_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he2}; 16'b1111_1111_1110_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he3}; 16'b1111_1111_1110_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he4}; 16'b1111_1111_1110_1111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he5}; 16'b1111_1111_1111_0000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he6}; 16'b1111_1111_1111_0001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he7}; 16'b1111_1111_1111_0010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he8}; 16'b1111_1111_1111_0011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'he9}; 16'b1111_1111_1111_0100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hea}; 16'b1111_1111_001?_????: jpeg_ac_luminance_huffman_dec = {4'ha, 8'hf0}; // ZRL 16'b1111_1111_1111_0101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf1}; 16'b1111_1111_1111_0110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf2}; 16'b1111_1111_1111_0111: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf3}; 16'b1111_1111_1111_1000: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf4}; 16'b1111_1111_1111_1001: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf5}; 16'b1111_1111_1111_1010: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf6}; 16'b1111_1111_1111_1011: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf7}; 16'b1111_1111_1111_1100: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf8}; 16'b1111_1111_1111_1101: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hf9}; 16'b1111_1111_1111_1110: jpeg_ac_luminance_huffman_dec = {4'hf, 8'hfa}; endcase end endfunction // jpeg_ac_luminance_huffman_dec /* J P E G _ A C _ C H R O M I N A N C E _ H U F F M A N _ D E C ITU-T.81 annex K.3.2 Table K.5 This function translates the default Huffman codeword into chrominance AC (RunLength, Size) codepair. Output is given as: codelength[3:0]-1, RunLength[3:0], size[3:0] The codewords are left-alligned to ease bitstream decomposition. example: codeword = 16'b0000_0001_1111_0111 codelength = 8 +1 = 9 ac_luminance_run_length = 3 ac_limunance_size (category) = 2 */ function [11:0] jpeg_ac_chrominance_huffman_dec; input [15:0] codeword; begin casex(codeword) // synopsys full_case parallel_case 16'b00??_????_????_????: jpeg_ac_chrominance_huffman_dec = {4'h1, 8'h00}; // EOB 16'b01??_????_????_????: jpeg_ac_chrominance_huffman_dec = {4'h1, 8'h01}; 16'b100?_????_????_????: jpeg_ac_chrominance_huffman_dec = {4'h2, 8'h02}; 16'b1010_????_????_????: jpeg_ac_chrominance_huffman_dec = {4'h3, 8'h03}; 16'b1100_0???_????_????: jpeg_ac_chrominance_huffman_dec = {4'h4, 8'h04}; 16'b1100_1???_????_????: jpeg_ac_chrominance_huffman_dec = {4'h4, 8'h05}; 16'b1110_00??_????_????: jpeg_ac_chrominance_huffman_dec = {4'h5, 8'h06}; 16'b1111_000?_????_????: jpeg_ac_chrominance_huffman_dec = {4'h6, 8'h07}; 16'b1111_1010_0???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'h08}; 16'b1111_1101_10??_????: jpeg_ac_chrominance_huffman_dec = {4'h9, 8'h09}; 16'b1111_1111_0100_????: jpeg_ac_chrominance_huffman_dec = {4'hb, 8'h0a}; 16'b1011_????_????_????: jpeg_ac_chrominance_huffman_dec = {4'h3, 8'h11}; 16'b1110_01??_????_????: jpeg_ac_chrominance_huffman_dec = {4'h5, 8'h12}; 16'b1111_0110_????_????: jpeg_ac_chrominance_huffman_dec = {4'h7, 8'h13}; 16'b1111_1010_1???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'h14}; 16'b1111_1110_110?_????: jpeg_ac_chrominance_huffman_dec = {4'ha, 8'h15}; 16'b1111_1111_0101_????: jpeg_ac_chrominance_huffman_dec = {4'hb, 8'h16}; 16'b1111_1111_1000_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h17}; 16'b1111_1111_1000_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h18}; 16'b1111_1111_1000_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h19}; 16'b1111_1111_1000_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h1a}; 16'b1101_0???_????_????: jpeg_ac_chrominance_huffman_dec = {4'h4, 8'h21}; 16'b1111_0111_????_????: jpeg_ac_chrominance_huffman_dec = {4'h7, 8'h22}; 16'b1111_1101_11??_????: jpeg_ac_chrominance_huffman_dec = {4'h9, 8'h23}; 16'b1111_1111_0110_????: jpeg_ac_chrominance_huffman_dec = {4'hb, 8'h24}; 16'b1111_1111_1000_010?: jpeg_ac_chrominance_huffman_dec = {4'he, 8'h25}; 16'b1111_1111_1000_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h26}; 16'b1111_1111_1000_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h27}; 16'b1111_1111_1000_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h28}; 16'b1111_1111_1000_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h29}; 16'b1111_1111_1001_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h2a}; 16'b1101_1???_????_????: jpeg_ac_chrominance_huffman_dec = {4'h4, 8'h31}; 16'b1111_1000_????_????: jpeg_ac_chrominance_huffman_dec = {4'h7, 8'h32}; 16'b1111_1110_00??_????: jpeg_ac_chrominance_huffman_dec = {4'h9, 8'h33}; 16'b1111_1111_0111_????: jpeg_ac_chrominance_huffman_dec = {4'hb, 8'h34}; 16'b1111_1111_1001_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h35}; 16'b1111_1111_1001_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h36}; 16'b1111_1111_1001_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h37}; 16'b1111_1111_1001_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h38}; 16'b1111_1111_1001_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h39}; 16'b1111_1111_1001_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h3a}; 16'b1110_10??_????_????: jpeg_ac_chrominance_huffman_dec = {4'h5, 8'h41}; 16'b1111_1011_0???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'h42}; 16'b1111_1111_1001_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h43}; 16'b1111_1111_1001_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h44}; 16'b1111_1111_1001_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h45}; 16'b1111_1111_1001_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h46}; 16'b1111_1111_1001_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h47}; 16'b1111_1111_1001_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h48}; 16'b1111_1111_1001_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h49}; 16'b1111_1111_1001_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h4a}; 16'b1110_11??_????_????: jpeg_ac_chrominance_huffman_dec = {4'h5, 8'h51}; 16'b1111_1110_01??_????: jpeg_ac_chrominance_huffman_dec = {4'h9, 8'h52}; 16'b1111_1111_1001_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h53}; 16'b1111_1111_1010_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h54}; 16'b1111_1111_1010_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h55}; 16'b1111_1111_1010_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h56}; 16'b1111_1111_1010_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h57}; 16'b1111_1111_1010_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h58}; 16'b1111_1111_1010_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h59}; 16'b1111_1111_1010_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h5a}; 16'b1111_001?_????_????: jpeg_ac_chrominance_huffman_dec = {4'h6, 8'h61}; 16'b1111_1110_111?_????: jpeg_ac_chrominance_huffman_dec = {4'ha, 8'h62}; 16'b1111_1111_1010_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h63}; 16'b1111_1111_1010_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h64}; 16'b1111_1111_1010_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h65}; 16'b1111_1111_1010_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h66}; 16'b1111_1111_1010_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h67}; 16'b1111_1111_1010_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h68}; 16'b1111_1111_1010_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h69}; 16'b1111_1111_1010_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h6a}; 16'b1111_010?_????_????: jpeg_ac_chrominance_huffman_dec = {4'h6, 8'h71}; 16'b1111_1111_000?_????: jpeg_ac_chrominance_huffman_dec = {4'ha, 8'h72}; 16'b1111_1111_1010_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h73}; 16'b1111_1111_1011_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h74}; 16'b1111_1111_1011_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h75}; 16'b1111_1111_1011_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h76}; 16'b1111_1111_1011_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h77}; 16'b1111_1111_1011_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h78}; 16'b1111_1111_1011_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h79}; 16'b1111_1111_1011_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h7a}; 16'b1111_1001_????_????: jpeg_ac_chrominance_huffman_dec = {4'h7, 8'h81}; 16'b1111_1111_1011_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h82}; 16'b1111_1111_1011_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h83}; 16'b1111_1111_1011_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h84}; 16'b1111_1111_1011_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h85}; 16'b1111_1111_1011_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h86}; 16'b1111_1111_1011_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h87}; 16'b1111_1111_1011_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h88}; 16'b1111_1111_1011_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h89}; 16'b1111_1111_1011_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h8a}; 16'b1111_1011_1???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'h91}; 16'b1111_1111_1100_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h92}; 16'b1111_1111_1100_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h93}; 16'b1111_1111_1100_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h94}; 16'b1111_1111_1100_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h95}; 16'b1111_1111_1100_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h96}; 16'b1111_1111_1100_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h97}; 16'b1111_1111_1100_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h98}; 16'b1111_1111_1100_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h99}; 16'b1111_1111_1100_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'h9a}; 16'b1111_1100_0???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'ha1}; 16'b1111_1111_1100_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha2}; 16'b1111_1111_1100_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha3}; 16'b1111_1111_1100_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha4}; 16'b1111_1111_1100_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha5}; 16'b1111_1111_1100_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha6}; 16'b1111_1111_1100_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha7}; 16'b1111_1111_1100_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha8}; 16'b1111_1111_1101_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'ha9}; 16'b1111_1111_1101_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'haa}; 16'b1111_1100_1???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'hb1}; 16'b1111_1111_1101_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb2}; 16'b1111_1111_1101_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb3}; 16'b1111_1111_1101_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb4}; 16'b1111_1111_1101_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb5}; 16'b1111_1111_1101_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb6}; 16'b1111_1111_1101_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb7}; 16'b1111_1111_1101_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb8}; 16'b1111_1111_1101_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hb9}; 16'b1111_1111_1101_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hba}; 16'b1111_1101_0???_????: jpeg_ac_chrominance_huffman_dec = {4'h8, 8'hc1}; 16'b1111_1111_1101_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc2}; 16'b1111_1111_1101_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc3}; 16'b1111_1111_1101_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc4}; 16'b1111_1111_1101_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc5}; 16'b1111_1111_1101_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc6}; 16'b1111_1111_1110_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc7}; 16'b1111_1111_1110_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc8}; 16'b1111_1111_1110_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hc9}; 16'b1111_1111_1110_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hca}; 16'b1111_1111_001?_????: jpeg_ac_chrominance_huffman_dec = {4'ha, 8'hd1}; 16'b1111_1111_1110_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd2}; 16'b1111_1111_1110_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd3}; 16'b1111_1111_1110_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd4}; 16'b1111_1111_1110_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd5}; 16'b1111_1111_1110_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd6}; 16'b1111_1111_1110_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd7}; 16'b1111_1111_1110_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd8}; 16'b1111_1111_1110_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hd9}; 16'b1111_1111_1110_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hda}; 16'b1111_1111_1000_00??: jpeg_ac_chrominance_huffman_dec = {4'hd, 8'he1}; 16'b1111_1111_1110_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he2}; 16'b1111_1111_1110_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he3}; 16'b1111_1111_1110_1111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he4}; 16'b1111_1111_1111_0000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he5}; 16'b1111_1111_1111_0001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he6}; 16'b1111_1111_1111_0010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he7}; 16'b1111_1111_1111_0011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he8}; 16'b1111_1111_1111_0100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'he9}; 16'b1111_1111_1111_0101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hea}; 16'b1111_1110_10??_????: jpeg_ac_chrominance_huffman_dec = {4'h9, 8'hf0}; 16'b1111_1111_1000_011?: jpeg_ac_chrominance_huffman_dec = {4'he, 8'hf1}; 16'b1111_1111_1111_0110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf2}; 16'b1111_1111_1111_0111: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf3}; 16'b1111_1111_1111_1000: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf4}; 16'b1111_1111_1111_1001: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf5}; 16'b1111_1111_1111_1010: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf6}; 16'b1111_1111_1111_1011: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf7}; 16'b1111_1111_1111_1100: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf8}; 16'b1111_1111_1111_1101: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hf9}; 16'b1111_1111_1111_1110: jpeg_ac_chrominance_huffman_dec = {4'hf, 8'hfa}; endcase end endfunction // jpeg_ac_chrominance_huffman_dec
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