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/**************************************

Author: J.W Tang

Email: jaytang1987@hotmail.com

Module: row_buf

Date: 2016-04-24

Copyright (C) 2016 J.W. Tang

----------------------------

This file is part of LinkRunCCA.

LinkRunCCA is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as

published by the Free Software Foundation, either version 3 of

the License, or (at your option) any later version.

LinkRunCCA is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with LinkRunCCA. If not, see <http://www.gnu.org/licenses/>.

By using LinkRunCCA in any or associated publication,

you agree to cite it as:

Tang, J. W., et al. "A linked list run-length-based single-pass

connected component analysis for real-time embedded hardware."

Journal of Real-Time Image Processing: 1-19. 2016.

doi:10.1007/s11554-016-0590-2.

***************************************/

module row_buf(clk,datavalid,pix_in,pix_out1,pix_out2);

parameter length=640;

input clk,datavalid,pix_in;

output pix_out1,pix_out2;

reg [length-1:0] R;

//reg R[0:length-1];

always@(posedge clk)begin

        if(datavalid)begin

                R[length-1:1]<=R[length-2:0];

                R[0]<=pix_in;

        end

end

assign pix_out1=R[length-1];

assign pix_out2=R[length-2];

endmodule