mirror of https://github.com/lnis-uofu/SOFA.git
295 lines
8.5 KiB
Verilog
295 lines
8.5 KiB
Verilog
//////////////////////////////////////////////////////////////////////
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//// ////
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//// cavlc_top ////
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//// ////
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//// Description ////
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//// top module of cavlc decoder ////
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//// ////
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//// Author(s): ////
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//// - bin qiu, qiubin@opencores.org ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2011 Authors and OPENCORES.ORG ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//2011-8-7 initial version
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`include "defines.v"
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module cavlc_top
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(
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clk,
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rst_n,
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ena,
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start,
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rbsp,
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nC,
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max_coeff_num,
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coeff_0,
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coeff_1,
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coeff_2,
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coeff_3,
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coeff_4,
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coeff_5,
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coeff_6,
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coeff_7,
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coeff_8,
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coeff_9,
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coeff_10,
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coeff_11,
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coeff_12,
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coeff_13,
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coeff_14,
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coeff_15,
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TotalCoeff,
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len_comb,
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idle,
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valid
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);
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//------------------------
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// ports
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//------------------------
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input clk, rst_n;
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input ena;
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input start;
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input [0:15] rbsp;
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input signed [5:0] nC;
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input [4:0] max_coeff_num;
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output signed [8:0] coeff_0;
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output signed [8:0] coeff_1;
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output signed [8:0] coeff_2;
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output signed [8:0] coeff_3;
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output signed [8:0] coeff_4;
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output signed [8:0] coeff_5;
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output signed [8:0] coeff_6;
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output signed [8:0] coeff_7;
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output signed [8:0] coeff_8;
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output signed [8:0] coeff_9;
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output signed [8:0] coeff_10;
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output signed [8:0] coeff_11;
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output signed [8:0] coeff_12;
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output signed [8:0] coeff_13;
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output signed [8:0] coeff_14;
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output signed [8:0] coeff_15;
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output [4:0] TotalCoeff;
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output [4:0] len_comb;
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output idle;
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output valid;
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//------------------------
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// cavlc_read_total_coeffs
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//------------------------
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wire [1:0] TrailingOnes;
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wire [4:0] TotalCoeff;
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wire [1:0] TrailingOnes_comb;
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wire [4:0] TotalCoeff_comb;
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wire [4:0] len_read_total_coeffs_comb;
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wire [7:0] cavlc_state;
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cavlc_read_total_coeffs cavlc_read_total_coeffs(
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.clk(clk),
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.rst_n(rst_n),
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.ena(ena),
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.start(start),
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.sel(cavlc_state[`cavlc_read_total_coeffs_bit]),
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.rbsp(rbsp),
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.nC(nC),
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.TrailingOnes(TrailingOnes),
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.TotalCoeff(TotalCoeff),
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.TrailingOnes_comb(TrailingOnes_comb),
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.TotalCoeff_comb(TotalCoeff_comb),
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.len_comb(len_read_total_coeffs_comb)
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);
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//------------------------
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// cavlc_read_levels
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//------------------------
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wire [4:0] len_read_levels_comb;
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wire [3:0] i;
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wire [8:0] level_0;
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wire [8:0] level_1;
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wire [8:0] level_2;
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wire [8:0] level_3;
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wire [8:0] level_4;
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wire [8:0] level_5;
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wire [8:0] level_6;
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wire [8:0] level_7;
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wire [8:0] level_8;
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wire [8:0] level_9;
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wire [8:0] level_10;
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wire [8:0] level_11;
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wire [8:0] level_12;
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wire [8:0] level_13;
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wire [8:0] level_14;
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wire [8:0] level_15;
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cavlc_read_levels cavlc_read_levels(
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.clk(clk),
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.rst_n(rst_n),
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.ena(ena),
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.t1s_sel(cavlc_state[`cavlc_read_t1s_flags_bit]),
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.prefix_sel(cavlc_state[`cavlc_read_level_prefix_bit]),
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.suffix_sel(cavlc_state[`cavlc_read_level_suffix_bit]),
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.calc_sel(cavlc_state[`cavlc_calc_level_bit]),
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.TrailingOnes(TrailingOnes),
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.TotalCoeff(TotalCoeff),
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.i(i),
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.rbsp(rbsp),
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.level_0(level_0),
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.level_1(level_1),
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.level_2(level_2),
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.level_3(level_3),
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.level_4(level_4),
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.level_5(level_5),
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.level_6(level_6),
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.level_7(level_7),
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.level_8(level_8),
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.level_9(level_9),
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.level_10(level_10),
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.level_11(level_11),
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.level_12(level_12),
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.level_13(level_13),
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.level_14(level_14),
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.level_15(level_15),
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.len_comb(len_read_levels_comb)
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);
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//------------------------
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// cavlc_read_total_zeros
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//------------------------
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wire [3:0] TotalZeros_comb;
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wire [3:0] len_read_total_zeros_comb;
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cavlc_read_total_zeros cavlc_read_total_zeros(
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.ena(ena),
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.sel(cavlc_state[`cavlc_read_total_zeros_bit]),
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.chroma_DC_sel(nC[5]),
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.rbsp(rbsp[0:8]),
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.TotalCoeff(TotalCoeff[3:0]),
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.TotalZeros_comb(TotalZeros_comb),
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.len_comb(len_read_total_zeros_comb)
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);
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//------------------------
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// read_run_before
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//------------------------
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wire [3:0] ZeroLeft;
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wire [3:0] len_read_run_befores_comb;
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cavlc_read_run_befores cavlc_read_run_befores(
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.clk(clk),
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.rst_n(rst_n),
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.ena(ena),
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.clr(cavlc_state[`cavlc_read_total_coeffs_bit]),
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.sel(cavlc_state[`cavlc_read_run_befores_bit]),
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.ZeroLeft_init(cavlc_state[`cavlc_read_total_zeros_bit]),
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.rbsp(rbsp[0:10]),
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.i(i),
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.TotalZeros_comb(TotalZeros_comb),
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.level_0(level_0),
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.level_1(level_1),
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.level_2(level_2),
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.level_3(level_3),
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.level_4(level_4),
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.level_5(level_5),
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.level_6(level_6),
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.level_7(level_7),
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.level_8(level_8),
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.level_9(level_9),
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.level_10(level_10),
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.level_11(level_11),
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.level_12(level_12),
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.level_13(level_13),
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.level_14(level_14),
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.level_15(level_15),
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.coeff_0(coeff_0),
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.coeff_1(coeff_1),
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.coeff_2(coeff_2),
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.coeff_3(coeff_3),
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.coeff_4(coeff_4),
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.coeff_5(coeff_5),
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.coeff_6(coeff_6),
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.coeff_7(coeff_7),
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.coeff_8(coeff_8),
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.coeff_9(coeff_9),
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.coeff_10(coeff_10),
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.coeff_11(coeff_11),
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.coeff_12(coeff_12),
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.coeff_13(coeff_13),
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.coeff_14(coeff_14),
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.coeff_15(coeff_15),
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.ZeroLeft(ZeroLeft),
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.len_comb(len_read_run_befores_comb)
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);
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//------------------------
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// cavlc_len_gen
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//------------------------
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wire [4:0] len_comb;
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cavlc_len_gen cavlc_len_gen(
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.cavlc_state(cavlc_state),
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.len_read_total_coeffs_comb(len_read_total_coeffs_comb),
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.len_read_levels_comb(len_read_levels_comb),
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.len_read_total_zeros_comb(len_read_total_zeros_comb),
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.len_read_run_befores_comb(len_read_run_befores_comb),
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.len_comb(len_comb)
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);
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//------------------------
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// fsm
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//------------------------
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cavlc_fsm cavlc_fsm(
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.clk(clk),
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.rst_n(rst_n),
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.ena(ena),
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.start(start),
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.max_coeff_num(max_coeff_num),
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.TotalCoeff(TotalCoeff),
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.TotalCoeff_comb(TotalCoeff_comb),
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.TrailingOnes(TrailingOnes),
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.TrailingOnes_comb(TrailingOnes_comb),
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.ZeroLeft(ZeroLeft),
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.state(cavlc_state),
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.i(i),
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.idle(idle),
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.valid(valid)
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);
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endmodule
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