?? dct_cos_table.v
字號(hào):
/////////////////////////////////////////////////////////////////////
//// ////
//// Discrete Cosine Transform, cosine table ////
//// ////
//// Author: Richard Herveille ////
//// richard@asics.ws ////
//// www.asics.ws ////
//// ////
/////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2001 Richard Herveille ////
//// richard@asics.ws ////
//// ////
//// 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. ////
//// ////
/////////////////////////////////////////////////////////////////////
// CVS Log
//
// $Id: dct_cos_table.v,v 1.2 2002/10/23 09:06:59 rherveille Exp $
//
// $Date: 2002/10/23 09:06:59 $
// $Revision: 1.2 $
// $Author: rherveille $
// $Locker: $
// $State: Exp $
//
// Change History:
// $Log: dct_cos_table.v,v $// Revision 1.2 2002/10/23 09:06:59 rherveille// Improved many files.// Fixed some bugs in Run-Length-Encoder.// Removed dependency on ud_cnt and ro_cnt.// Started (Motion)JPEG hardware encoder project.//
function [31:0] dct_cos_table;
//
// inputs & outputs
//
input [2:0] x,y,u,v; // table entry
begin
//
// Table definition
//
// Function: cos( (2x +1) * u * pi)/16) * cos( (2y +1) * v * pi)/16)
//
// select bits:
// 11:9 - V
// 8:6 - U
// 5:3 - Y
// 2:0 - X
case ( {v,u} ) // synopsys full_case parallel_case
6'h00:
case ( {y,x} ) // synopsys full_case parallel_case
6'h00: dct_cos_table = 32'h20000000; // = +0.500000
6'h01: dct_cos_table = 32'h20000000; // = +0.500000
6'h02: dct_cos_table = 32'h20000000; // = +0.500000
6'h03: dct_cos_table = 32'h20000000; // = +0.500000
6'h04: dct_cos_table = 32'h20000000; // = +0.500000
6'h05: dct_cos_table = 32'h20000000; // = +0.500000
6'h06: dct_cos_table = 32'h20000000; // = +0.500000
6'h07: dct_cos_table = 32'h20000000; // = +0.500000
6'h08: dct_cos_table = 32'h20000000; // = +0.500000
6'h09: dct_cos_table = 32'h20000000; // = +0.500000
6'h0a: dct_cos_table = 32'h20000000; // = +0.500000
6'h0b: dct_cos_table = 32'h20000000; // = +0.500000
6'h0c: dct_cos_table = 32'h20000000; // = +0.500000
6'h0d: dct_cos_table = 32'h20000000; // = +0.500000
6'h0e: dct_cos_table = 32'h20000000; // = +0.500000
6'h0f: dct_cos_table = 32'h20000000; // = +0.500000
6'h10: dct_cos_table = 32'h20000000; // = +0.500000
6'h11: dct_cos_table = 32'h20000000; // = +0.500000
6'h12: dct_cos_table = 32'h20000000; // = +0.500000
6'h13: dct_cos_table = 32'h20000000; // = +0.500000
6'h14: dct_cos_table = 32'h20000000; // = +0.500000
6'h15: dct_cos_table = 32'h20000000; // = +0.500000
6'h16: dct_cos_table = 32'h20000000; // = +0.500000
6'h17: dct_cos_table = 32'h20000000; // = +0.500000
6'h18: dct_cos_table = 32'h20000000; // = +0.500000
6'h19: dct_cos_table = 32'h20000000; // = +0.500000
6'h1a: dct_cos_table = 32'h20000000; // = +0.500000
6'h1b: dct_cos_table = 32'h20000000; // = +0.500000
6'h1c: dct_cos_table = 32'h20000000; // = +0.500000
6'h1d: dct_cos_table = 32'h20000000; // = +0.500000
6'h1e: dct_cos_table = 32'h20000000; // = +0.500000
6'h1f: dct_cos_table = 32'h20000000; // = +0.500000
6'h20: dct_cos_table = 32'h20000000; // = +0.500000
6'h21: dct_cos_table = 32'h20000000; // = +0.500000
6'h22: dct_cos_table = 32'h20000000; // = +0.500000
6'h23: dct_cos_table = 32'h20000000; // = +0.500000
6'h24: dct_cos_table = 32'h20000000; // = +0.500000
6'h25: dct_cos_table = 32'h20000000; // = +0.500000
6'h26: dct_cos_table = 32'h20000000; // = +0.500000
6'h27: dct_cos_table = 32'h20000000; // = +0.500000
6'h28: dct_cos_table = 32'h20000000; // = +0.500000
6'h29: dct_cos_table = 32'h20000000; // = +0.500000
6'h2a: dct_cos_table = 32'h20000000; // = +0.500000
6'h2b: dct_cos_table = 32'h20000000; // = +0.500000
6'h2c: dct_cos_table = 32'h20000000; // = +0.500000
6'h2d: dct_cos_table = 32'h20000000; // = +0.500000
6'h2e: dct_cos_table = 32'h20000000; // = +0.500000
6'h2f: dct_cos_table = 32'h20000000; // = +0.500000
6'h30: dct_cos_table = 32'h20000000; // = +0.500000
6'h31: dct_cos_table = 32'h20000000; // = +0.500000
6'h32: dct_cos_table = 32'h20000000; // = +0.500000
6'h33: dct_cos_table = 32'h20000000; // = +0.500000
6'h34: dct_cos_table = 32'h20000000; // = +0.500000
6'h35: dct_cos_table = 32'h20000000; // = +0.500000
6'h36: dct_cos_table = 32'h20000000; // = +0.500000
6'h37: dct_cos_table = 32'h20000000; // = +0.500000
6'h38: dct_cos_table = 32'h20000000; // = +0.500000
6'h39: dct_cos_table = 32'h20000000; // = +0.500000
6'h3a: dct_cos_table = 32'h20000000; // = +0.500000
6'h3b: dct_cos_table = 32'h20000000; // = +0.500000
6'h3c: dct_cos_table = 32'h20000000; // = +0.500000
6'h3d: dct_cos_table = 32'h20000000; // = +0.500000
6'h3e: dct_cos_table = 32'h20000000; // = +0.500000
6'h3f: dct_cos_table = 32'h20000000; // = +0.500000
endcase
6'h01:
case ( {y,x} ) // synopsys full_case parallel_case
6'h00: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h01: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h02: dct_cos_table = 32'h192469c0; // = +0.392847
6'h03: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h04: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h05: dct_cos_table = 32'he6db9640; // = -0.392847
6'h06: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h07: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h08: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h09: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h0a: dct_cos_table = 32'h192469c0; // = +0.392847
6'h0b: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h0c: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h0d: dct_cos_table = 32'he6db9640; // = -0.392847
6'h0e: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h0f: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h10: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h11: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h12: dct_cos_table = 32'h192469c0; // = +0.392847
6'h13: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h14: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h15: dct_cos_table = 32'he6db9640; // = -0.392847
6'h16: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h17: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h18: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h19: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h1a: dct_cos_table = 32'h192469c0; // = +0.392847
6'h1b: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h1c: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h1d: dct_cos_table = 32'he6db9640; // = -0.392847
6'h1e: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h1f: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h20: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h21: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h22: dct_cos_table = 32'h192469c0; // = +0.392847
6'h23: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h24: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h25: dct_cos_table = 32'he6db9640; // = -0.392847
6'h26: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h27: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h28: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h29: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h2a: dct_cos_table = 32'h192469c0; // = +0.392847
6'h2b: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h2c: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h2d: dct_cos_table = 32'he6db9640; // = -0.392847
6'h2e: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h2f: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h30: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h31: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h32: dct_cos_table = 32'h192469c0; // = +0.392847
6'h33: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h34: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h35: dct_cos_table = 32'he6db9640; // = -0.392847
6'h36: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h37: dct_cos_table = 32'hd39d5e9e; // = -0.693520
6'h38: dct_cos_table = 32'h2c62a162; // = +0.693520
6'h39: dct_cos_table = 32'h25a0c5df; // = +0.587938
6'h3a: dct_cos_table = 32'h192469c0; // = +0.392847
6'h3b: dct_cos_table = 32'h08d42aef; // = +0.137950
6'h3c: dct_cos_table = 32'hf72bd511; // = -0.137950
6'h3d: dct_cos_table = 32'he6db9640; // = -0.392847
6'h3e: dct_cos_table = 32'hda5f3a21; // = -0.587938
6'h3f: dct_cos_table = 32'hd39d5e9e; // = -0.693520
endcase
6'h02:
case ( {y,x} ) // synopsys full_case parallel_case
6'h00: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h01: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h02: dct_cos_table = 32'heeae8585; // = -0.270598
6'h03: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h04: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h05: dct_cos_table = 32'heeae8585; // = -0.270598
6'h06: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h07: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h08: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h09: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h0a: dct_cos_table = 32'heeae8585; // = -0.270598
6'h0b: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h0c: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h0d: dct_cos_table = 32'heeae8585; // = -0.270598
6'h0e: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h0f: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h10: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h11: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h12: dct_cos_table = 32'heeae8585; // = -0.270598
6'h13: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h14: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h15: dct_cos_table = 32'heeae8585; // = -0.270598
6'h16: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h17: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h18: dct_cos_table = 32'h29cf5d22; // = +0.653281
6'h19: dct_cos_table = 32'h11517a7b; // = +0.270598
6'h1a: dct_cos_table = 32'heeae8585; // = -0.270598
6'h1b: dct_cos_table = 32'hd630a2de; // = -0.653281
6'h1c: dct_cos_table = 32'hd630a2de; // = -0.653281
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