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[/] [djpeg/] [trunk/] [src/] [jpeg_ycbcr.v] - Blame information for rev 9

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1 3 hidemi 
//---------------------------------------------------------------------------
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// File Name   : jpeg_ycbcr.v
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// Module Name : jpeg_ycbcr
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// Description : Convert to RGB from YCbCr
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// Project     : JPEG Decoder
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// Belong to   :
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// Author      : H.Ishihara
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// E-Mail      : hidemi@sweetcafe.jp
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// HomePage    : http://www.sweetcafe.jp/
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// Date        : 2006/10/01
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// Rev.        : 1.1
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//---------------------------------------------------------------------------
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// Rev. Date       Description
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//---------------------------------------------------------------------------
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// 1.01 2006/10/01 1st Release
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//---------------------------------------------------------------------------
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`timescale 1ps / 1ps
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19 9 hidemi 
module jpeg_ycbcr(
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    rst,
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    clk,
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23 9 hidemi 
    ProcessInit,
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25 9 hidemi 
    DataInEnable,
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    DataInPage,
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    DataInCount,
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    DataInIdle,
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    Data0In,
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    Data1In,
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    DataInBlockWidth,
32 3 hidemi 
 
33 9 hidemi 
    OutEnable,
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    OutPixelX,
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    OutPixelY,
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    OutR,
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    OutG,
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    OutB
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    );
40 3 hidemi 
 
41 9 hidemi 
    input           rst;
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    input           clk;
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    input           ProcessInit;
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    input           DataInEnable;
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    input [2:0]     DataInPage;
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    input [1:0]     DataInCount;
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    output          DataInIdle;
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    input [8:0]     Data0In;
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    input [8:0]     Data1In;
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    input [11:0]    DataInBlockWidth;
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    output          OutEnable;
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    output [15:0]   OutPixelX;
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    output [15:0]   OutPixelY;
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    output [7:0]    OutR;
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    output [7:0]    OutG;
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    output [7:0]    OutB;
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    reg [2:0]       DataInColor;
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    reg [11:0]      DataInBlockX;
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    reg [11:0]      DataInBlockY;
64 3 hidemi 
 
65 9 hidemi 
    wire            ConvertEnable;
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    wire            ConvertRead;
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    wire            ConvertBank;
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    wire [7:0]      ConvertAddress;
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    wire [8:0]      DataY;
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    wire [8:0]      DataCb;
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    wire [8:0]      DataCr;
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    wire [11:0]     ConvertBlockX;
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    wire [11:0]     ConvertBlockY;
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    always @(posedge clk or negedge rst) begin
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        if(!rst) begin
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            DataInColor  <= 3'b000;
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        end else begin
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            if(ProcessInit) begin
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                DataInColor <= 3'b000;
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            end else if(DataInEnable == 1'b1 & DataInPage == 3'b111 & DataInCount == 2'b11) begin
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                if(DataInColor == 3'b101) begin
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                    DataInColor <= 3'b000;
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                end else begin
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                    DataInColor <= DataInColor + 3'b001;
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                end
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            end
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        end
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    end
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    //------------------------------------------------------------------------
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    // YCbCr Memory
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    //------------------------------------------------------------------------
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    jpeg_ycbcr_mem u_jpeg_ycbcr_mem(
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        .rst            ( rst               ),
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        .clk            ( clk               ),
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        .DataInit       ( ProcessInit       ),
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        .DataInEnable   ( DataInEnable      ),
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        .DataInColor    ( DataInColor       ),
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        .DataInPage     ( DataInPage        ),
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        .DataInCount    ( DataInCount       ),
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        .Data0In        ( Data0In           ),
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        .Data1In        ( Data1In           ),
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        .DataOutEnable  ( ConvertEnable     ),
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        .DataOutAddress ( ConvertAddress    ),
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        .DataOutRead    ( ConvertRead       ),
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        .DataOutY       ( DataY             ),
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        .DataOutCb      ( DataCb            ),
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        .DataOutCr      ( DataCr            )
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    );
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    //------------------------------------------------------------------------
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    // YCbCr to RGB
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    //------------------------------------------------------------------------
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    always @(posedge clk or negedge rst) begin
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        if(!rst) begin
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            DataInBlockX <= 12'h000;
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            DataInBlockY <= 12'h000;
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        end else begin
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            if(ProcessInit) begin
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                DataInBlockX <= 12'h000;
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                DataInBlockY <= 12'h000;
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            end else if((ConvertRead == 1'b1) && (ConvertAddress == 5'h1F)) begin
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                if(DataInBlockWidth == DataInBlockX +1) begin
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                    DataInBlockX <= 12'h000;
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                    DataInBlockY <= DataInBlockY + 12'h001;
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                end else begin
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                    DataInBlockX <= DataInBlockX + 12'h001;
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                end
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            end
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        end
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    end
136 3 hidemi 
 
137 9 hidemi 
    jpeg_ycbcr2rgb u_jpeg_yccr2rgb(
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        .rst        ( rst               ),
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        .clk        ( clk               ),
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        .InEnable   ( ConvertEnable     ),
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        .InRead     ( ConvertRead       ),
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        .InBlockX   ( DataInBlockX      ),
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        .InBlockY   ( DataInBlockY      ),
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        .InAddress  ( ConvertAddress    ),
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        .InY        ( DataY             ),
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        .InCb       ( DataCb            ),
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        .InCr       ( DataCr            ),
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        .OutEnable  ( OutEnable         ),
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        .OutPixelX  ( OutPixelX         ),
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        .OutPixelY  ( OutPixelY         ),
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        .OutR       ( OutR              ),
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        .OutG       ( OutG              ),
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        .OutB       ( OutB              )
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    );
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endmodule

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