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////////////////////////////////////////////////////////////////////////////
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//// ////
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//// t2600 IP Core ////
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//// ////
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//// This file is part of the t2600 project ////
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//// http://www.opencores.org/cores/t2600/ ////
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//// ////
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//// Description ////
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//// Color scheme conversion ////
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//// ////
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//// TODO: ////
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//// - Maybe less colors will be used ////
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//// ////
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//// Author(s): ////
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//// - Gabriel Oshiro Zardo, gabrieloshiro@gmail.com ////
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//// - Samuel Nascimento Pagliarini (creep), snpagliarini@gmail.com ////
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//// ////
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////////////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2001 Authors and OPENCORES.ORG ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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////////////////////////////////////////////////////////////////////////////
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// note: this converts 7 ypbpr bits into 24 rgb bits. In order to use less rgb bits just use the most significant ones.
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`include "timescale.v"
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module video_converter(ypbpr, rgb);
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input [6:0] ypbpr;
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output reg [23:0] rgb;
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always @(*) begin
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case (ypbpr[2:0]) // luminance
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3'h0: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'h000000;
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4'h1: rgb = 24'h444400;
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4'h2: rgb = 24'h702800;
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4'h3: rgb = 24'h841800;
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4'h4: rgb = 24'h880000;
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4'h5: rgb = 24'h78005C;
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4'h6: rgb = 24'h480078;
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4'h7: rgb = 24'h140084;
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4'h8: rgb = 24'h000088;
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4'h9: rgb = 24'h00187C;
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4'hA: rgb = 24'h002C5C;
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4'hB: rgb = 24'h003C2C;
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4'hC: rgb = 24'h003C00;
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4'hD: rgb = 24'h143800;
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4'hE: rgb = 24'h2C3000;
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4'hF: rgb = 24'h442800;
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endcase
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end
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3'h1: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'h404040;
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4'h1: rgb = 24'h646410;
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4'h2: rgb = 24'h844414;
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4'h3: rgb = 24'h983418;
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4'h4: rgb = 24'h9C2020;
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4'h5: rgb = 24'h8C2074;
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4'h6: rgb = 24'h602090;
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4'h7: rgb = 24'h302098;
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4'h8: rgb = 24'h1C209C;
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4'h9: rgb = 24'h1C3890;
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4'hA: rgb = 24'h1C4C78;
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4'hB: rgb = 24'h1C5C48;
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4'hC: rgb = 24'h205C20;
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4'hD: rgb = 24'h345C1C;
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4'hE: rgb = 24'h4C501C;
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4'hF: rgb = 24'h644818;
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endcase
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end
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3'h2: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'h6C6C6C;
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4'h1: rgb = 24'h848424;
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4'h2: rgb = 24'h985C28;
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4'h3: rgb = 24'hAC5030;
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4'h4: rgb = 24'hB03C3C;
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4'h5: rgb = 24'hA03C88;
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4'h6: rgb = 24'h783CA4;
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4'h7: rgb = 24'h4C3CAC;
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4'h8: rgb = 24'h3840B0;
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4'h9: rgb = 24'h3854A8;
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4'hA: rgb = 24'h386890;
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4'hB: rgb = 24'h387C64;
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4'hC: rgb = 24'h407C40;
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4'hD: rgb = 24'h507C38;
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4'hE: rgb = 24'h687034;
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4'hF: rgb = 24'h846830;
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endcase
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end
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3'h3: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'h909090;
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4'h1: rgb = 24'hA0A034;
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4'h2: rgb = 24'hAC783C;
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4'h3: rgb = 24'hC06848;
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4'h4: rgb = 24'hC05858;
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4'h5: rgb = 24'hB0589C;
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4'h6: rgb = 24'h8C58B8;
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4'h7: rgb = 24'h6858C0;
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4'h8: rgb = 24'h505CC0;
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4'h9: rgb = 24'h5070BC;
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4'hA: rgb = 24'h5084AC;
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4'hB: rgb = 24'h509C80;
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4'hC: rgb = 24'h5C9C5C;
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4'hD: rgb = 24'h6C9850;
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4'hE: rgb = 24'h848C4C;
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4'hF: rgb = 24'hA08444;
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endcase
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end
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3'h4: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'hB0B0B0;
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4'h1: rgb = 24'hB8B840;
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4'h2: rgb = 24'hBC8C4C;
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4'h3: rgb = 24'hD0805C;
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4'h4: rgb = 24'hD07070;
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4'h5: rgb = 24'hC070B0;
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4'h6: rgb = 24'hA070CC;
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4'h7: rgb = 24'h7C70D0;
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4'h8: rgb = 24'h6874D0;
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4'h9: rgb = 24'h6888CC;
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4'hA: rgb = 24'h689CC0;
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4'hB: rgb = 24'h68B494;
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4'hC: rgb = 24'h74B474;
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4'hD: rgb = 24'h84B468;
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4'hE: rgb = 24'h9CA864;
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4'hF: rgb = 24'hB89C58;
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endcase
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end
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3'h5: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'hC8C8C8;
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4'h1: rgb = 24'hD0D050;
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4'h2: rgb = 24'hCCA05C;
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4'h3: rgb = 24'hE09470;
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4'h4: rgb = 24'hE08888;
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4'h5: rgb = 24'hD084C0;
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4'h6: rgb = 24'hB484DC;
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4'h7: rgb = 24'h9488E0;
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4'h8: rgb = 24'h7C8CE0;
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4'h9: rgb = 24'h7C9CDC;
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4'hA: rgb = 24'h7CB4D4;
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4'hB: rgb = 24'h7CD0AC;
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4'hC: rgb = 24'h8CD08C;
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4'hD: rgb = 24'h9CCC7C;
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4'hE: rgb = 24'hB4C078;
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4'hF: rgb = 24'hD0B46C;
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endcase
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end
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3'h6: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'hDCDCDC;
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4'h1: rgb = 24'hE8E85C;
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4'h2: rgb = 24'hDCB468;
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4'h3: rgb = 24'hECA880;
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4'h4: rgb = 24'hECA0A0;
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4'h5: rgb = 24'hDC9CD0;
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4'h6: rgb = 24'hC49CEC;
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4'h7: rgb = 24'hA8A0EC;
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4'h8: rgb = 24'h90A4EC;
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4'h9: rgb = 24'h90B4EC;
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4'hA: rgb = 24'h90CCE8;
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4'hB: rgb = 24'h90E4C0;
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4'hC: rgb = 24'hA4E4A4;
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4'hD: rgb = 24'hB4E490;
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4'hE: rgb = 24'hCCD488;
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4'hF: rgb = 24'hE8CC7C;
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endcase
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end
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3'h7: begin
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case (ypbpr[6:3])
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4'h0: rgb = 24'hECECEC;
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4'h1: rgb = 24'hFCFC68;
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4'h2: rgb = 24'hECC878;
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4'h3: rgb = 24'hFCBC94;
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4'h4: rgb = 24'hFCB4B4;
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4'h5: rgb = 24'hECB0E0;
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4'h6: rgb = 24'hD4B0FC;
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4'h7: rgb = 24'hBCB4FC;
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4'h8: rgb = 24'hA4B8FC;
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4'h9: rgb = 24'hA4C8FC;
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4'hA: rgb = 24'hA4E0FC;
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4'hB: rgb = 24'hA4FCD4;
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4'hC: rgb = 24'hB8FCB8;
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4'hD: rgb = 24'hC8FCA4;
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4'hE: rgb = 24'hE0EC9C;
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4'hF: rgb = 24'hFCE08C;
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endcase
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end
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endcase
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end
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endmodule
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