118 lines
4.3 KiB
Coq
118 lines
4.3 KiB
Coq
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// ***************************************************************************
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// ***************************************************************************
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// Copyright 2011(c) Analog Devices, Inc.
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// - Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// - Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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// - Neither the name of Analog Devices, Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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// - The use of this software may or may not infringe the patent rights
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// of one or more patent holders. This license does not release you
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// from the requirement that you obtain separate licenses from these
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// patent holders to use this software.
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// - Use of the software either in source or binary form, must be run
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// on or directly connected to an Analog Devices Inc. component.
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//
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// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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// INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE ARE DISCLAIMED.
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//
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// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
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// RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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// Transmit HDMI, RGB to CrYCb conversion
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// The multiplication coefficients are in 1.4.12 format
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// The addition coefficients are in 1.12.12 format
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// Cr = (+112.439/256)*R + (-094.154/256)*G + (-018.285/256)*B + 128;
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// Y = (+065.738/256)*R + (+129.057/256)*G + (+025.064/256)*B + 16;
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// Cb = (-037.945/256)*R + (-074.494/256)*G + (+112.439/256)*B + 128;
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module ad_csc_RGB2CrYCb (
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// R-G-B inputs
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clk,
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RGB_sync,
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RGB_data,
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// Cr-Y-Cb outputs
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CrYCb_sync,
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CrYCb_data);
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// parameters
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parameter DELAY_DATA_WIDTH = 16;
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localparam DW = DELAY_DATA_WIDTH - 1;
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// R-G-B inputs
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input clk;
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input [DW:0] RGB_sync;
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input [23:0] RGB_data;
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// Cr-Y-Cb outputs
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output [DW:0] CrYCb_sync;
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output [23:0] CrYCb_data;
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// Cr (red-diff)
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ad_csc_1 #(.DELAY_DATA_WIDTH(DELAY_DATA_WIDTH)) i_csc_1_Cr (
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.clk (clk),
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.sync (RGB_sync),
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.data (RGB_data),
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.C1 (17'h00707),
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.C2 (17'h105e2),
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.C3 (17'h10124),
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.C4 (25'h0080000),
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.csc_sync_1 (CrYCb_sync),
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.csc_data_1 (CrYCb_data[23:16]));
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// Y (luma)
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ad_csc_1 #(.DELAY_DATA_WIDTH(1)) i_csc_1_Y (
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.clk (clk),
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.sync (1'd0),
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.data (RGB_data),
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.C1 (17'h0041b),
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.C2 (17'h00810),
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.C3 (17'h00191),
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.C4 (25'h0010000),
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.csc_sync_1 (),
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.csc_data_1 (CrYCb_data[15:8]));
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// Cb (blue-diff)
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ad_csc_1 #(.DELAY_DATA_WIDTH(1)) i_csc_1_Cb (
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.clk (clk),
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.sync (1'd0),
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.data (RGB_data),
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.C1 (17'h1025f),
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.C2 (17'h104a7),
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.C3 (17'h00707),
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.C4 (25'h0080000),
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.csc_sync_1 (),
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.csc_data_1 (CrYCb_data[7:0]));
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endmodule
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// ***************************************************************************
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// ***************************************************************************
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