Subversion Repositories jpegencode

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////  JPEG Encoder Core - Verilog                                ////

////                                                             ////

////  Author: David Lundgren                                     ////

////          davidklun@gmail.com                                ////

////                                                             ////

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////                                                             ////

//// Copyright (C) 2009 David Lundgren                           ////

////                  davidklun@gmail.com                        ////

////                                                             ////

//// 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.                                 ////

////                                                             ////

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/* This is the top level module of the JPEG Encoder Core.

This module takes the output from the fifo_out module and sends it

to the ff_checker module to check for FF's in the bitstream.  When it finds an

FF, it puts a 00 after it, and then continues with the rest of the bitstream.

At the end of the file, if there is not a full 32 bit set of JPEG data, then the

signal "eof_data_partial_ready" will go high, to indicate there

are less than 32 valid JPEG bits in the bitstream.  The number of valid bits in the

last JPEG_bitstream value is written to the signal "end_of_file_bitstream_count".

*/

`timescale 1ns / 100ps

module jpeg_top(clk, rst, end_of_file_signal, enable, data_in, JPEG_bitstream,

data_ready, end_of_file_bitstream_count, eof_data_partial_ready);

input           clk;

input           rst;

input           end_of_file_signal;

input           enable;

input   [23:0]   data_in;

output  [31:0]  JPEG_bitstream;

output          data_ready;

output  [4:0] end_of_file_bitstream_count;

output          eof_data_partial_ready;

wire [31:0] JPEG_FF;

wire data_ready_FF;

wire [4:0] orc_reg_in;

 fifo_out u19 (.clk(clk), .rst(rst), .enable(enable), .data_in(data_in),

 .JPEG_bitstream(JPEG_FF), .data_ready(data_ready_FF), .orc_reg(orc_reg_in));

 ff_checker u20 (.clk(clk), .rst(rst),

 .end_of_file_signal(end_of_file_signal), .JPEG_in(JPEG_FF),

 .data_ready_in(data_ready_FF), .orc_reg_in(orc_reg_in),

 .JPEG_bitstream_1(JPEG_bitstream),

 .data_ready_1(data_ready), .orc_reg(end_of_file_bitstream_count),

 .eof_data_partial_ready(eof_data_partial_ready));

 endmodule