//--------------------------------------------------------------------------------------------------
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//--------------------------------------------------------------------------------------------------
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// Design : nova
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// Design : nova
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// Author(s) : Ke Xu
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// Author(s) : Ke Xu
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// Email : eexuke@yahoo.com
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// Email : eexuke@yahoo.com
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// File : NumCoeffTrailingOnes_decoding.v
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// File : NumCoeffTrailingOnes_decoding.v
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// Generated : June 8, 2005
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// Generated : June 8, 2005
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// Copyright (C) 2008 Ke Xu
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// Copyright (C) 2008 Ke Xu
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//-------------------------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------------------------
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// Description
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// Description
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// Decoding for Table 9-5 on Page159 of H.264/AVC standard 2003
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// Decoding for Table 9-5 on Page159 of H.264/AVC standard 2003
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//-------------------------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------------------------
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// synopsys translate_off
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// synopsys translate_off
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`include "timescale.v"
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`include "timescale.v"
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// synopsys translate_on
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// synopsys translate_on
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`include "nova_defines.v"
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`include "nova_defines.v"
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module NumCoeffTrailingOnes_decoding (clk,reset_n,cavlc_decoder_state,heading_one_pos,BitStream_buffer_output,
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module NumCoeffTrailingOnes_decoding (clk,reset_n,cavlc_decoder_state,heading_one_pos,BitStream_buffer_output,
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nC,TrailingOnes,TotalCoeff,NumCoeffTrailingOnes_len);
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nC,TrailingOnes,TotalCoeff,NumCoeffTrailingOnes_len);
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input clk,reset_n;
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input clk,reset_n;
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input [3:0] cavlc_decoder_state;
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input [3:0] cavlc_decoder_state;
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input [3:0] heading_one_pos;
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input [3:0] heading_one_pos;
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input [15:0] BitStream_buffer_output;
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input [15:0] BitStream_buffer_output;
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input [4:0] nC;
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input [4:0] nC;
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output [1:0] TrailingOnes;
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output [1:0] TrailingOnes;
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output [4:0] TotalCoeff;
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output [4:0] TotalCoeff;
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output [4:0] NumCoeffTrailingOnes_len;
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output [4:0] NumCoeffTrailingOnes_len;
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reg [1:0] TrailingOnes;
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reg [1:0] TrailingOnes;
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reg [4:0] TotalCoeff;
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reg [4:0] TotalCoeff;
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reg [4:0] NumCoeffTrailingOnes_len;
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reg [4:0] NumCoeffTrailingOnes_len;
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reg [1:0] TrailingOnes_reg;
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reg [1:0] TrailingOnes_reg;
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reg [4:0] TotalCoeff_reg;
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reg [4:0] TotalCoeff_reg;
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wire nC_0to2,nC_2to4,nC_4to8,nC_n1,nC_GE8;
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wire nC_0to2,nC_2to4,nC_4to8,nC_n1,nC_GE8;
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wire nC_0to2_t0,nC_0to2_t1,nC_0to2_t2,nC_0to2_t3;
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wire nC_0to2_t0,nC_0to2_t1,nC_0to2_t2,nC_0to2_t3;
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wire nC_2to4_t0,nC_2to4_t1,nC_2to4_t2,nC_2to4_t3;
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wire nC_2to4_t0,nC_2to4_t1,nC_2to4_t2,nC_2to4_t3;
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wire nC_4to8_t0,nC_4to8_t1;
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wire nC_4to8_t0,nC_4to8_t1;
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wire nC_n1_t0;
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wire nC_n1_t0;
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//Select nC values to choose table
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//Select nC values to choose table
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assign nC_0to2 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd0 || nC == 5'd1));
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assign nC_0to2 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd0 || nC == 5'd1));
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assign nC_2to4 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd2 || nC == 5'd3));
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assign nC_2to4 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd2 || nC == 5'd3));
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assign nC_4to8 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd4 || nC == 5'd5 || nC == 5'd6 || nC == 5'd7));
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assign nC_4to8 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd4 || nC == 5'd5 || nC == 5'd6 || nC == 5'd7));
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assign nC_n1 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd31));
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assign nC_n1 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && (nC == 5'd31));
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assign nC_GE8 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && !nC_0to2 && !nC_2to4 && !nC_4to8 && !nC_n1);
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assign nC_GE8 = (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT && !nC_0to2 && !nC_2to4 && !nC_4to8 && !nC_n1);
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//1.nC_0to2 t0 ~ t4 sub-table selection
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//1.nC_0to2 t0 ~ t4 sub-table selection
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assign nC_0to2_t0 = (nC_0to2 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1 || heading_one_pos == 4'd2));
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assign nC_0to2_t0 = (nC_0to2 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1 || heading_one_pos == 4'd2));
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assign nC_0to2_t1 = (nC_0to2 && (heading_one_pos == 4'd3 || heading_one_pos == 4'd4));
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assign nC_0to2_t1 = (nC_0to2 && (heading_one_pos == 4'd3 || heading_one_pos == 4'd4));
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assign nC_0to2_t2 = (nC_0to2 && (heading_one_pos == 4'd5 || heading_one_pos == 4'd6 || heading_one_pos == 4'd7 || heading_one_pos == 4'd8));
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assign nC_0to2_t2 = (nC_0to2 && (heading_one_pos == 4'd5 || heading_one_pos == 4'd6 || heading_one_pos == 4'd7 || heading_one_pos == 4'd8));
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assign nC_0to2_t3 = (nC_0to2 && (heading_one_pos == 4'd9 || heading_one_pos == 4'd10));
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assign nC_0to2_t3 = (nC_0to2 && (heading_one_pos == 4'd9 || heading_one_pos == 4'd10));
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//2.nC_2to4 t0 ~ t4 sub-table selection
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//2.nC_2to4 t0 ~ t4 sub-table selection
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assign nC_2to4_t0 = (nC_2to4 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1));
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assign nC_2to4_t0 = (nC_2to4 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1));
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assign nC_2to4_t1 = (nC_2to4 && (heading_one_pos == 4'd2 || heading_one_pos == 4'd3));
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assign nC_2to4_t1 = (nC_2to4 && (heading_one_pos == 4'd2 || heading_one_pos == 4'd3));
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assign nC_2to4_t2 = (nC_2to4 && (heading_one_pos == 4'd4 || heading_one_pos == 4'd5 || heading_one_pos == 4'd6));
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assign nC_2to4_t2 = (nC_2to4 && (heading_one_pos == 4'd4 || heading_one_pos == 4'd5 || heading_one_pos == 4'd6));
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assign nC_2to4_t3 = (nC_2to4 && (heading_one_pos == 4'd7 || heading_one_pos == 4'd8));
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assign nC_2to4_t3 = (nC_2to4 && (heading_one_pos == 4'd7 || heading_one_pos == 4'd8));
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//3.nC_4to8 t0 ~ t2 sub-table selection
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//3.nC_4to8 t0 ~ t2 sub-table selection
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assign nC_4to8_t0 = (nC_4to8 && heading_one_pos == 4'd0);
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assign nC_4to8_t0 = (nC_4to8 && heading_one_pos == 4'd0);
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assign nC_4to8_t1 = (nC_4to8 && (heading_one_pos == 4'd1 || heading_one_pos == 4'd2 || heading_one_pos == 4'd3 || heading_one_pos == 4'd4));
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assign nC_4to8_t1 = (nC_4to8 && (heading_one_pos == 4'd1 || heading_one_pos == 4'd2 || heading_one_pos == 4'd3 || heading_one_pos == 4'd4));
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//4.nC_GE8:single table, NO sub-table selection
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//4.nC_GE8:single table, NO sub-table selection
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//5.nC_n1 t0 ~ t1 sub-table selection
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//5.nC_n1 t0 ~ t1 sub-table selection
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assign nC_n1_t0 = (nC_n1 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1 || heading_one_pos == 4'd2));
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assign nC_n1_t0 = (nC_n1 && (heading_one_pos == 4'd0 || heading_one_pos == 4'd1 || heading_one_pos == 4'd2));
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//NumCoeffTrailingOnes_len
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//NumCoeffTrailingOnes_len
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always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_GE8 or nC_n1 or heading_one_pos or BitStream_buffer_output)
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always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_GE8 or nC_n1 or heading_one_pos or BitStream_buffer_output)
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if (nC_0to2)
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if (nC_0to2)
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case (heading_one_pos)
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case (heading_one_pos)
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0 :NumCoeffTrailingOnes_len <= 5'd1;
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0 :NumCoeffTrailingOnes_len <= 5'd1;
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1 :NumCoeffTrailingOnes_len <= 5'd2;
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1 :NumCoeffTrailingOnes_len <= 5'd2;
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2 :NumCoeffTrailingOnes_len <= 5'd3;
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2 :NumCoeffTrailingOnes_len <= 5'd3;
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3 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[11] == 1)? 5'd5:5'd6;
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3 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[11] == 1)? 5'd5:5'd6;
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4 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[10] == 1)? 5'd6:5'd7;
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4 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[10] == 1)? 5'd6:5'd7;
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5 :NumCoeffTrailingOnes_len <= 5'd8;
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5 :NumCoeffTrailingOnes_len <= 5'd8;
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6 :NumCoeffTrailingOnes_len <= 5'd9;
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6 :NumCoeffTrailingOnes_len <= 5'd9;
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7 :NumCoeffTrailingOnes_len <= 5'd10;
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7 :NumCoeffTrailingOnes_len <= 5'd10;
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8 :NumCoeffTrailingOnes_len <= 5'd11;
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8 :NumCoeffTrailingOnes_len <= 5'd11;
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9 :NumCoeffTrailingOnes_len <= 5'd13;
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9 :NumCoeffTrailingOnes_len <= 5'd13;
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10:NumCoeffTrailingOnes_len <= 5'd14;
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10:NumCoeffTrailingOnes_len <= 5'd14;
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11:NumCoeffTrailingOnes_len <= 5'd15;
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11:NumCoeffTrailingOnes_len <= 5'd15;
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12:NumCoeffTrailingOnes_len <= 5'd16;
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12:NumCoeffTrailingOnes_len <= 5'd16;
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13:NumCoeffTrailingOnes_len <= 5'd16;
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13:NumCoeffTrailingOnes_len <= 5'd16;
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14:NumCoeffTrailingOnes_len <= 5'd15;
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14:NumCoeffTrailingOnes_len <= 5'd15;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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endcase
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endcase
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else if (nC_2to4)
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else if (nC_2to4)
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case (heading_one_pos)
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case (heading_one_pos)
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0 :NumCoeffTrailingOnes_len <= 5'd2;
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0 :NumCoeffTrailingOnes_len <= 5'd2;
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1 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[13] == 1)? 5'd3:5'd4;
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1 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[13] == 1)? 5'd3:5'd4;
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2 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[12] == 1)? 5'd5:5'd6;
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2 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[12] == 1)? 5'd5:5'd6;
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3 :NumCoeffTrailingOnes_len <= 5'd6;
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3 :NumCoeffTrailingOnes_len <= 5'd6;
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4 :NumCoeffTrailingOnes_len <= 5'd7;
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4 :NumCoeffTrailingOnes_len <= 5'd7;
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5 :NumCoeffTrailingOnes_len <= 5'd8;
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5 :NumCoeffTrailingOnes_len <= 5'd8;
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6 :NumCoeffTrailingOnes_len <= 5'd9;
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6 :NumCoeffTrailingOnes_len <= 5'd9;
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7 :NumCoeffTrailingOnes_len <= 5'd11;
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7 :NumCoeffTrailingOnes_len <= 5'd11;
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8 :NumCoeffTrailingOnes_len <= 5'd12;
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8 :NumCoeffTrailingOnes_len <= 5'd12;
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9 :NumCoeffTrailingOnes_len <= 5'd13;
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9 :NumCoeffTrailingOnes_len <= 5'd13;
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10:NumCoeffTrailingOnes_len <= (BitStream_buffer_output[4] == 1)? 5'd13:5'd14;
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10:NumCoeffTrailingOnes_len <= (BitStream_buffer_output[4] == 1)? 5'd13:5'd14;
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11:NumCoeffTrailingOnes_len <= 5'd14;
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11:NumCoeffTrailingOnes_len <= 5'd14;
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12:NumCoeffTrailingOnes_len <= 5'd13;
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12:NumCoeffTrailingOnes_len <= 5'd13;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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endcase
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endcase
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else if (nC_n1)
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else if (nC_n1)
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case (heading_one_pos)
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case (heading_one_pos)
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0:NumCoeffTrailingOnes_len <= 5'd1;
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0:NumCoeffTrailingOnes_len <= 5'd1;
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1:NumCoeffTrailingOnes_len <= 5'd2;
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1:NumCoeffTrailingOnes_len <= 5'd2;
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2:NumCoeffTrailingOnes_len <= 5'd3;
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2:NumCoeffTrailingOnes_len <= 5'd3;
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3:NumCoeffTrailingOnes_len <= 5'd6;
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3:NumCoeffTrailingOnes_len <= 5'd6;
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4:NumCoeffTrailingOnes_len <= 5'd6;
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4:NumCoeffTrailingOnes_len <= 5'd6;
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5:NumCoeffTrailingOnes_len <= 5'd7;
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5:NumCoeffTrailingOnes_len <= 5'd7;
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6:NumCoeffTrailingOnes_len <= 5'd8;
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6:NumCoeffTrailingOnes_len <= 5'd8;
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default:NumCoeffTrailingOnes_len <= 5'd7;
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default:NumCoeffTrailingOnes_len <= 5'd7;
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endcase
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endcase
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else if (nC_4to8)
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else if (nC_4to8)
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case (heading_one_pos)
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case (heading_one_pos)
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0 :NumCoeffTrailingOnes_len <= 5'd4;
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0 :NumCoeffTrailingOnes_len <= 5'd4;
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1 :NumCoeffTrailingOnes_len <= 5'd5;
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1 :NumCoeffTrailingOnes_len <= 5'd5;
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2 :NumCoeffTrailingOnes_len <= 5'd6;
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2 :NumCoeffTrailingOnes_len <= 5'd6;
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3 :NumCoeffTrailingOnes_len <= 5'd7;
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3 :NumCoeffTrailingOnes_len <= 5'd7;
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4 :NumCoeffTrailingOnes_len <= 5'd8;
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4 :NumCoeffTrailingOnes_len <= 5'd8;
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5 :NumCoeffTrailingOnes_len <= 5'd9;
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5 :NumCoeffTrailingOnes_len <= 5'd9;
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6 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[8:7] == 2'b11)? 5'd9:5'd10;
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6 :NumCoeffTrailingOnes_len <= (BitStream_buffer_output[8:7] == 2'b11)? 5'd9:5'd10;
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7 :NumCoeffTrailingOnes_len <= 5'd10;
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7 :NumCoeffTrailingOnes_len <= 5'd10;
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8 :NumCoeffTrailingOnes_len <= 5'd10;
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8 :NumCoeffTrailingOnes_len <= 5'd10;
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9 :NumCoeffTrailingOnes_len <= 5'd10;
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9 :NumCoeffTrailingOnes_len <= 5'd10;
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10:NumCoeffTrailingOnes_len <= 5'd10;
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10:NumCoeffTrailingOnes_len <= 5'd10;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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default:NumCoeffTrailingOnes_len <= 5'd0;
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endcase
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endcase
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else if (nC_GE8)
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else if (nC_GE8)
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NumCoeffTrailingOnes_len <= 5'd6;
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NumCoeffTrailingOnes_len <= 5'd6;
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else
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else
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NumCoeffTrailingOnes_len <= 0;
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NumCoeffTrailingOnes_len <= 0;
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//TrailingOnes
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//TrailingOnes
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always @ (posedge clk)
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always @ (posedge clk)
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if (reset_n == 0)
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if (reset_n == 0)
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TrailingOnes_reg <= 0;
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TrailingOnes_reg <= 0;
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else if (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT)
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else if (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT)
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TrailingOnes_reg <= TrailingOnes;
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TrailingOnes_reg <= TrailingOnes;
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always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_n1 or nC_GE8
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always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_n1 or nC_GE8
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or nC_0to2_t0 or nC_0to2_t1 or nC_0to2_t2 or nC_0to2_t3
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or nC_0to2_t0 or nC_0to2_t1 or nC_0to2_t2 or nC_0to2_t3
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or nC_2to4_t0 or nC_2to4_t1 or nC_2to4_t2 or nC_2to4_t3
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or nC_2to4_t0 or nC_2to4_t1 or nC_2to4_t2 or nC_2to4_t3
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or nC_4to8_t0 or nC_4to8_t1 or nC_n1_t0
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or nC_4to8_t0 or nC_4to8_t1 or nC_n1_t0
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or TrailingOnes_reg or heading_one_pos or BitStream_buffer_output)
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or TrailingOnes_reg or heading_one_pos or BitStream_buffer_output)
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if (nC_0to2)
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if (nC_0to2)
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begin
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begin
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if (nC_0to2_t0)
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if (nC_0to2_t0)
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TrailingOnes <= heading_one_pos[1:0];
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TrailingOnes <= heading_one_pos[1:0];
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else if (nC_0to2_t1)
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else if (nC_0to2_t1)
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begin
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begin
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if (heading_one_pos == 4'd3 && !BitStream_buffer_output[11])
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if (heading_one_pos == 4'd3 && !BitStream_buffer_output[11])
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TrailingOnes <= (BitStream_buffer_output[10])? 2'd0:2'd1;
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TrailingOnes <= (BitStream_buffer_output[10])? 2'd0:2'd1;
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else if (heading_one_pos == 4'd4 && BitStream_buffer_output[10:9] == 2'b01)
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else if (heading_one_pos == 4'd4 && BitStream_buffer_output[10:9] == 2'b01)
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TrailingOnes <= 2'd2;
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TrailingOnes <= 2'd2;
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else
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else
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TrailingOnes <= 2'd3;
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TrailingOnes <= 2'd3;
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end
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end
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else if (nC_0to2_t2)
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else if (nC_0to2_t2)
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begin
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begin
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if (heading_one_pos == 4'd5)
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if (heading_one_pos == 4'd5)
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case (BitStream_buffer_output[9:8])
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case (BitStream_buffer_output[9:8])
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2'b00:TrailingOnes <= 2'd3;
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2'b00:TrailingOnes <= 2'd3;
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2'b01:TrailingOnes <= 2'd2;
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2'b01:TrailingOnes <= 2'd2;
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2'b10:TrailingOnes <= 2'd1;
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2'b10:TrailingOnes <= 2'd1;
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2'b11:TrailingOnes <= 2'd0;
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2'b11:TrailingOnes <= 2'd0;
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endcase
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endcase
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else if (heading_one_pos == 4'd6)
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else if (heading_one_pos == 4'd6)
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case (BitStream_buffer_output[8:7])
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case (BitStream_buffer_output[8:7])
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2'b00:TrailingOnes <= 2'd3;
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2'b00:TrailingOnes <= 2'd3;
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2'b01:TrailingOnes <= 2'd2;
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2'b01:TrailingOnes <= 2'd2;
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2'b10:TrailingOnes <= 2'd1;
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2'b10:TrailingOnes <= 2'd1;
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2'b11:TrailingOnes <= 2'd0;
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2'b11:TrailingOnes <= 2'd0;
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endcase
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endcase
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else if (heading_one_pos == 4'd7)
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else if (heading_one_pos == 4'd7)
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case (BitStream_buffer_output[7:6])
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case (BitStream_buffer_output[7:6])
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2'b00:TrailingOnes <= 2'd3;
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2'b00:TrailingOnes <= 2'd3;
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2'b01:TrailingOnes <= 2'd2;
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2'b01:TrailingOnes <= 2'd2;
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2'b10:TrailingOnes <= 2'd1;
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2'b10:TrailingOnes <= 2'd1;
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2'b11:TrailingOnes <= 2'd0;
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2'b11:TrailingOnes <= 2'd0;
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endcase
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endcase
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else
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else
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case (BitStream_buffer_output[6:5])
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case (BitStream_buffer_output[6:5])
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2'b00:TrailingOnes <= 2'd3;
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2'b00:TrailingOnes <= 2'd3;
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2'b01:TrailingOnes <= 2'd2;
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2'b01:TrailingOnes <= 2'd2;
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2'b10:TrailingOnes <= 2'd1;
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2'b10:TrailingOnes <= 2'd1;
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2'b11:TrailingOnes <= 2'd0;
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2'b11:TrailingOnes <= 2'd0;
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endcase
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endcase
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end
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end
|
else if (nC_0to2_t3)
|
else if (nC_0to2_t3)
|
begin
|
begin
|
if (heading_one_pos == 4'd9)
|
if (heading_one_pos == 4'd9)
|
case (BitStream_buffer_output[4:3])
|
case (BitStream_buffer_output[4:3])
|
2'b00:TrailingOnes <= (BitStream_buffer_output[5])? 2'd3:2'd0;
|
2'b00:TrailingOnes <= (BitStream_buffer_output[5])? 2'd3:2'd0;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b11:TrailingOnes <= 2'd0;
|
2'b11:TrailingOnes <= 2'd0;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[3:2])
|
case (BitStream_buffer_output[3:2])
|
2'b00:TrailingOnes <= 2'd3;
|
2'b00:TrailingOnes <= 2'd3;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b11:TrailingOnes <= 2'd0;
|
2'b11:TrailingOnes <= 2'd0;
|
endcase
|
endcase
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b11) ||
|
if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b11) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b11) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b11) ||
|
(heading_one_pos == 4'd13 && (BitStream_buffer_output[1:0] == 2'b00 || BitStream_buffer_output[1:0] == 2'b11)))
|
(heading_one_pos == 4'd13 && (BitStream_buffer_output[1:0] == 2'b00 || BitStream_buffer_output[1:0] == 2'b11)))
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b10) ||
|
else if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b10) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b10) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b10) ||
|
(heading_one_pos == 4'd13 && BitStream_buffer_output[1:0] == 2'b10) ||
|
(heading_one_pos == 4'd13 && BitStream_buffer_output[1:0] == 2'b10) ||
|
heading_one_pos == 4'd14)
|
heading_one_pos == 4'd14)
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b01) ||
|
else if ((heading_one_pos == 4'd11 && BitStream_buffer_output[2:1] == 2'b01) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b01) ||
|
(heading_one_pos == 4'd12 && BitStream_buffer_output[1:0] == 2'b01) ||
|
(heading_one_pos == 4'd13 && BitStream_buffer_output[1:0] == 2'b01))
|
(heading_one_pos == 4'd13 && BitStream_buffer_output[1:0] == 2'b01))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else
|
else
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
end
|
end
|
end
|
end
|
else if (nC_2to4)
|
else if (nC_2to4)
|
begin
|
begin
|
if (nC_2to4_t0)
|
if (nC_2to4_t0)
|
begin
|
begin
|
if (heading_one_pos == 4'd0)
|
if (heading_one_pos == 4'd0)
|
TrailingOnes <= {1'b0,~BitStream_buffer_output[14]};
|
TrailingOnes <= {1'b0,~BitStream_buffer_output[14]};
|
else
|
else
|
TrailingOnes <= (BitStream_buffer_output[13])? 2'd2:2'd3;
|
TrailingOnes <= (BitStream_buffer_output[13])? 2'd2:2'd3;
|
end
|
end
|
else if (nC_2to4_t1)
|
else if (nC_2to4_t1)
|
begin
|
begin
|
if ((heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b011) ||
|
if ((heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b011) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b11))
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b11))
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if ((heading_one_pos == 4'd2 && (BitStream_buffer_output[12:11] == 2'b11 || BitStream_buffer_output[12:10] == 3'b010)) ||
|
else if ((heading_one_pos == 4'd2 && (BitStream_buffer_output[12:11] == 2'b11 || BitStream_buffer_output[12:10] == 3'b010)) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b10))
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b10))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if ((heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b001) ||
|
else if ((heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b001) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b01))
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b01))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else
|
else
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
end
|
end
|
else if (nC_2to4_t2)
|
else if (nC_2to4_t2)
|
begin
|
begin
|
if (heading_one_pos == 4'd4)
|
if (heading_one_pos == 4'd4)
|
case (BitStream_buffer_output[10:9])
|
case (BitStream_buffer_output[10:9])
|
2'b00:TrailingOnes <= 2'd3;
|
2'b00:TrailingOnes <= 2'd3;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b11:TrailingOnes <= 2'd0;
|
2'b11:TrailingOnes <= 2'd0;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd5)
|
else if (heading_one_pos == 4'd5)
|
case (BitStream_buffer_output[9:8])
|
case (BitStream_buffer_output[9:8])
|
2'b00:TrailingOnes <= 2'd0;
|
2'b00:TrailingOnes <= 2'd0;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b11:TrailingOnes <= 2'd0;
|
2'b11:TrailingOnes <= 2'd0;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[8:7])
|
case (BitStream_buffer_output[8:7])
|
2'b00:TrailingOnes <= 2'd3;
|
2'b00:TrailingOnes <= 2'd3;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b01:TrailingOnes <= 2'd2;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b10:TrailingOnes <= 2'd1;
|
2'b11:TrailingOnes <= 2'd0;
|
2'b11:TrailingOnes <= 2'd0;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_2to4_t3)
|
else if (nC_2to4_t3)
|
begin
|
begin
|
if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b11) ||
|
if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b11) ||
|
(heading_one_pos == 4'd8 && (BitStream_buffer_output[5:4] == 2'b11 || BitStream_buffer_output[6:4] == 3'b000)))
|
(heading_one_pos == 4'd8 && (BitStream_buffer_output[5:4] == 2'b11 || BitStream_buffer_output[6:4] == 3'b000)))
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b10) ||
|
else if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b10) ||
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[5:4] == 2'b10))
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[5:4] == 2'b10))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b01) ||
|
else if ((heading_one_pos == 4'd7 && BitStream_buffer_output[6:5] == 2'b01) ||
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[5:4] == 2'b01))
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[5:4] == 2'b01))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else
|
else
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b11) ||
|
if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b11) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:3] == 2'b11 || BitStream_buffer_output[4:2] == 3'b001)) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:3] == 2'b11 || BitStream_buffer_output[4:2] == 3'b001)) ||
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b11))
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b11))
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b10) ||
|
else if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b10) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:2] == 3'b000 || BitStream_buffer_output[4:2] == 3'b011)) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:2] == 3'b000 || BitStream_buffer_output[4:2] == 3'b011)) ||
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b10))
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b10))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b01) ||
|
else if ((heading_one_pos == 4'd9 && BitStream_buffer_output[4:3] == 2'b01) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:3] == 2'b10 || BitStream_buffer_output[4:2] == 3'b010)) ||
|
(heading_one_pos == 4'd10 && (BitStream_buffer_output[4:3] == 2'b10 || BitStream_buffer_output[4:2] == 3'b010)) ||
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b01))
|
(heading_one_pos == 4'd11 && BitStream_buffer_output[3:2] == 2'b01))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else
|
else
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
end
|
end
|
end
|
end
|
else if (nC_n1)
|
else if (nC_n1)
|
begin
|
begin
|
if (nC_n1_t0)
|
if (nC_n1_t0)
|
begin
|
begin
|
if (BitStream_buffer_output[15]) TrailingOnes <= 2'd1;
|
if (BitStream_buffer_output[15]) TrailingOnes <= 2'd1;
|
else if (BitStream_buffer_output[14]) TrailingOnes <= 2'd0;
|
else if (BitStream_buffer_output[14]) TrailingOnes <= 2'd0;
|
else TrailingOnes <= 2'd2;
|
else TrailingOnes <= 2'd2;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if ((heading_one_pos == 4'd3 && (BitStream_buffer_output[11:10] == 2'b00 || BitStream_buffer_output[11:10] == 2'b11)) ||
|
if ((heading_one_pos == 4'd3 && (BitStream_buffer_output[11:10] == 2'b00 || BitStream_buffer_output[11:10] == 2'b11)) ||
|
heading_one_pos == 4'd4)
|
heading_one_pos == 4'd4)
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if ((heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b10) ||
|
else if ((heading_one_pos == 4'd3 && BitStream_buffer_output[11:10] == 2'b10) ||
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[9]) ||
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[9]) ||
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8]))
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8]))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if ((heading_one_pos == 4'd5 && !BitStream_buffer_output[9]) ||
|
else if ((heading_one_pos == 4'd5 && !BitStream_buffer_output[9]) ||
|
(heading_one_pos == 4'd6 && !BitStream_buffer_output[8]))
|
(heading_one_pos == 4'd6 && !BitStream_buffer_output[8]))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else
|
else
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
end
|
end
|
end
|
end
|
else if (nC_4to8)
|
else if (nC_4to8)
|
begin
|
begin
|
if (nC_4to8_t0)
|
if (nC_4to8_t0)
|
begin
|
begin
|
if (BitStream_buffer_output[14:12] == 3'b111) TrailingOnes <= 2'd0;
|
if (BitStream_buffer_output[14:12] == 3'b111) TrailingOnes <= 2'd0;
|
else if (BitStream_buffer_output[14:12] == 3'b110) TrailingOnes <= 2'd1;
|
else if (BitStream_buffer_output[14:12] == 3'b110) TrailingOnes <= 2'd1;
|
else if (BitStream_buffer_output[14:12] == 3'b101) TrailingOnes <= 2'd2;
|
else if (BitStream_buffer_output[14:12] == 3'b101) TrailingOnes <= 2'd2;
|
else TrailingOnes <= 2'd3;
|
else TrailingOnes <= 2'd3;
|
end
|
end
|
else if (nC_4to8_t1)
|
else if (nC_4to8_t1)
|
begin
|
begin
|
if ((heading_one_pos == 4'd1 &&
|
if ((heading_one_pos == 4'd1 &&
|
(BitStream_buffer_output[13:11] == 3'b000 || BitStream_buffer_output[13:11] == 3'b010 ||
|
(BitStream_buffer_output[13:11] == 3'b000 || BitStream_buffer_output[13:11] == 3'b010 ||
|
BitStream_buffer_output[13:11] == 3'b100 || BitStream_buffer_output[13:11] == 3'b111)) ||
|
BitStream_buffer_output[13:11] == 3'b100 || BitStream_buffer_output[13:11] == 3'b111)) ||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[11:10] == 2'b10 ) ||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[11:10] == 2'b10 ) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:9] == 3'b110) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:9] == 3'b110) ||
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b10 ))
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b10 ))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if (
|
else if (
|
(heading_one_pos == 4'd1 && (BitStream_buffer_output[13:11] == 3'b001 || BitStream_buffer_output[13:11] == 3'b011 || BitStream_buffer_output[13:11] == 3'b110))||
|
(heading_one_pos == 4'd1 && (BitStream_buffer_output[13:11] == 3'b001 || BitStream_buffer_output[13:11] == 3'b011 || BitStream_buffer_output[13:11] == 3'b110))||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[11:10] == 2'b01) ||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[11:10] == 2'b01) ||
|
(heading_one_pos == 4'd3 && (BitStream_buffer_output[11:9] == 3'b010 || BitStream_buffer_output[11:9] == 3'b101))||
|
(heading_one_pos == 4'd3 && (BitStream_buffer_output[11:9] == 3'b010 || BitStream_buffer_output[11:9] == 3'b101))||
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b01))
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b01))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else if (
|
else if (
|
(heading_one_pos == 4'd1 && BitStream_buffer_output[13:11] == 3'b101) ||
|
(heading_one_pos == 4'd1 && BitStream_buffer_output[13:11] == 3'b101) ||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b100) ||
|
(heading_one_pos == 4'd2 && BitStream_buffer_output[12:10] == 3'b100) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:9] == 3'b100) ||
|
(heading_one_pos == 4'd3 && BitStream_buffer_output[11:9] == 3'b100) ||
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b00))
|
(heading_one_pos == 4'd4 && BitStream_buffer_output[9:8] == 2'b00))
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
else
|
else
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if ((heading_one_pos == 4'd5 && BitStream_buffer_output[8:7] == 2'b10) ||
|
if ((heading_one_pos == 4'd5 && BitStream_buffer_output[8:7] == 2'b10) ||
|
(heading_one_pos == 4'd6 && (BitStream_buffer_output[8:7] == 2'b11 || BitStream_buffer_output[7:6] == 2'b00)) ||
|
(heading_one_pos == 4'd6 && (BitStream_buffer_output[8:7] == 2'b11 || BitStream_buffer_output[7:6] == 2'b00)) ||
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b00))
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b00))
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else if (
|
else if (
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[8:7] == 2'b01) ||
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[8:7] == 2'b01) ||
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8:6] == 3'b011) ||
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8:6] == 3'b011) ||
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b11) ||
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b11) ||
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[6]))
|
(heading_one_pos == 4'd8 && BitStream_buffer_output[6]))
|
TrailingOnes <= 2'd2;
|
TrailingOnes <= 2'd2;
|
else if (
|
else if (
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[9:7] == 3'b100) ||
|
(heading_one_pos == 4'd5 && BitStream_buffer_output[9:7] == 3'b100) ||
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8:6] == 3'b010) ||
|
(heading_one_pos == 4'd6 && BitStream_buffer_output[8:6] == 3'b010) ||
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b10) ||
|
(heading_one_pos == 4'd7 && BitStream_buffer_output[7:6] == 2'b10) ||
|
(heading_one_pos == 4'd8 && !BitStream_buffer_output[6]))
|
(heading_one_pos == 4'd8 && !BitStream_buffer_output[6]))
|
TrailingOnes <= 2'd3;
|
TrailingOnes <= 2'd3;
|
else
|
else
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
end
|
end
|
end
|
end
|
else if (nC_GE8)
|
else if (nC_GE8)
|
begin
|
begin
|
if (BitStream_buffer_output[15:10] == 6'b0 || heading_one_pos == 4'd4)
|
if (BitStream_buffer_output[15:10] == 6'b0 || heading_one_pos == 4'd4)
|
TrailingOnes <= 2'd0;
|
TrailingOnes <= 2'd0;
|
else if (heading_one_pos == 4'd5)
|
else if (heading_one_pos == 4'd5)
|
TrailingOnes <= 2'd1;
|
TrailingOnes <= 2'd1;
|
else
|
else
|
TrailingOnes <= BitStream_buffer_output[11:10];
|
TrailingOnes <= BitStream_buffer_output[11:10];
|
end
|
end
|
else
|
else
|
TrailingOnes <= TrailingOnes_reg;
|
TrailingOnes <= TrailingOnes_reg;
|
|
|
//TotalCoeff
|
//TotalCoeff
|
always @ (posedge clk)
|
always @ (posedge clk)
|
if (reset_n == 0)
|
if (reset_n == 0)
|
TotalCoeff_reg <= 0;
|
TotalCoeff_reg <= 0;
|
else if (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT)
|
else if (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT)
|
TotalCoeff_reg <= TotalCoeff;
|
TotalCoeff_reg <= TotalCoeff;
|
|
|
always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_n1 or nC_GE8
|
always @ (nC_0to2 or nC_2to4 or nC_4to8 or nC_n1 or nC_GE8
|
or nC_0to2_t0 or nC_0to2_t1 or nC_0to2_t2 or nC_0to2_t3
|
or nC_0to2_t0 or nC_0to2_t1 or nC_0to2_t2 or nC_0to2_t3
|
or nC_2to4_t0 or nC_2to4_t1 or nC_2to4_t2 or nC_2to4_t3
|
or nC_2to4_t0 or nC_2to4_t1 or nC_2to4_t2 or nC_2to4_t3
|
or nC_4to8_t0 or nC_4to8_t1 or nC_n1_t0
|
or nC_4to8_t0 or nC_4to8_t1 or nC_n1_t0
|
or TotalCoeff_reg or heading_one_pos or BitStream_buffer_output)
|
or TotalCoeff_reg or heading_one_pos or BitStream_buffer_output)
|
if (nC_0to2)
|
if (nC_0to2)
|
begin
|
begin
|
if (nC_0to2_t0)
|
if (nC_0to2_t0)
|
TotalCoeff <= {3'b0,heading_one_pos[1:0]};
|
TotalCoeff <= {3'b0,heading_one_pos[1:0]};
|
else if (nC_0to2_t1)
|
else if (nC_0to2_t1)
|
begin
|
begin
|
if (heading_one_pos == 4'd3)
|
if (heading_one_pos == 4'd3)
|
case (BitStream_buffer_output[11:10])
|
case (BitStream_buffer_output[11:10])
|
2'b00 :TotalCoeff <= 5'd2;
|
2'b00 :TotalCoeff <= 5'd2;
|
2'b01 :TotalCoeff <= 5'd1;
|
2'b01 :TotalCoeff <= 5'd1;
|
default:TotalCoeff <= 5'd3;
|
default:TotalCoeff <= 5'd3;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[10:9])
|
case (BitStream_buffer_output[10:9])
|
2'b00 :TotalCoeff <= 5'd5;
|
2'b00 :TotalCoeff <= 5'd5;
|
2'b01 :TotalCoeff <= 5'd3;
|
2'b01 :TotalCoeff <= 5'd3;
|
default:TotalCoeff <= 5'd4;
|
default:TotalCoeff <= 5'd4;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_0to2_t2)
|
else if (nC_0to2_t2)
|
begin
|
begin
|
if (heading_one_pos == 4'd5)
|
if (heading_one_pos == 4'd5)
|
case (BitStream_buffer_output[9:8])
|
case (BitStream_buffer_output[9:8])
|
2'b00:TotalCoeff <= 5'd6;
|
2'b00:TotalCoeff <= 5'd6;
|
2'b01:TotalCoeff <= 5'd4;
|
2'b01:TotalCoeff <= 5'd4;
|
2'b10:TotalCoeff <= 5'd3;
|
2'b10:TotalCoeff <= 5'd3;
|
2'b11:TotalCoeff <= 5'd2;
|
2'b11:TotalCoeff <= 5'd2;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd6)
|
else if (heading_one_pos == 4'd6)
|
case (BitStream_buffer_output[8:7])
|
case (BitStream_buffer_output[8:7])
|
2'b00:TotalCoeff <= 5'd7;
|
2'b00:TotalCoeff <= 5'd7;
|
2'b01:TotalCoeff <= 5'd5;
|
2'b01:TotalCoeff <= 5'd5;
|
2'b10:TotalCoeff <= 5'd4;
|
2'b10:TotalCoeff <= 5'd4;
|
2'b11:TotalCoeff <= 5'd3;
|
2'b11:TotalCoeff <= 5'd3;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd7)
|
else if (heading_one_pos == 4'd7)
|
case (BitStream_buffer_output[7:6])
|
case (BitStream_buffer_output[7:6])
|
2'b00:TotalCoeff <= 5'd8;
|
2'b00:TotalCoeff <= 5'd8;
|
2'b01:TotalCoeff <= 5'd6;
|
2'b01:TotalCoeff <= 5'd6;
|
2'b10:TotalCoeff <= 5'd5;
|
2'b10:TotalCoeff <= 5'd5;
|
2'b11:TotalCoeff <= 5'd4;
|
2'b11:TotalCoeff <= 5'd4;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[6:5])
|
case (BitStream_buffer_output[6:5])
|
2'b00:TotalCoeff <= 5'd9;
|
2'b00:TotalCoeff <= 5'd9;
|
2'b01:TotalCoeff <= 5'd7;
|
2'b01:TotalCoeff <= 5'd7;
|
2'b10:TotalCoeff <= 5'd6;
|
2'b10:TotalCoeff <= 5'd6;
|
2'b11:TotalCoeff <= 5'd5;
|
2'b11:TotalCoeff <= 5'd5;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_0to2_t3)
|
else if (nC_0to2_t3)
|
begin
|
begin
|
if (heading_one_pos == 4'd9)
|
if (heading_one_pos == 4'd9)
|
case (BitStream_buffer_output[5:3])
|
case (BitStream_buffer_output[5:3])
|
3'b001 :TotalCoeff <= 5'd9;
|
3'b001 :TotalCoeff <= 5'd9;
|
3'b011,3'b110:TotalCoeff <= 5'd7;
|
3'b011,3'b110:TotalCoeff <= 5'd7;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b111 :TotalCoeff <= 5'd6;
|
3'b111 :TotalCoeff <= 5'd6;
|
default :TotalCoeff <= 5'd8;
|
default :TotalCoeff <= 5'd8;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[4:2])
|
case (BitStream_buffer_output[4:2])
|
3'b000 :TotalCoeff <= 5'd12;
|
3'b000 :TotalCoeff <= 5'd12;
|
3'b001,3'b100:TotalCoeff <= 5'd11;
|
3'b001,3'b100:TotalCoeff <= 5'd11;
|
3'b110,3'b111:TotalCoeff <= 5'd9;
|
3'b110,3'b111:TotalCoeff <= 5'd9;
|
default :TotalCoeff <= 5'd10;
|
default :TotalCoeff <= 5'd10;
|
endcase
|
endcase
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if (heading_one_pos == 4'd11)
|
if (heading_one_pos == 4'd11)
|
case (BitStream_buffer_output[3:1])
|
case (BitStream_buffer_output[3:1])
|
3'b000 :TotalCoeff <= 5'd14;
|
3'b000 :TotalCoeff <= 5'd14;
|
3'b001,3'b100:TotalCoeff <= 5'd13;
|
3'b001,3'b100:TotalCoeff <= 5'd13;
|
3'b110,3'b111:TotalCoeff <= 5'd11;
|
3'b110,3'b111:TotalCoeff <= 5'd11;
|
default :TotalCoeff <= 5'd12;
|
default :TotalCoeff <= 5'd12;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd12)
|
else if (heading_one_pos == 4'd12)
|
case (BitStream_buffer_output[2:0])
|
case (BitStream_buffer_output[2:0])
|
3'b000 :TotalCoeff <= 5'd16;
|
3'b000 :TotalCoeff <= 5'd16;
|
3'b011,3'b101,3'b110:TotalCoeff <= 5'd14;
|
3'b011,3'b101,3'b110:TotalCoeff <= 5'd14;
|
3'b111 :TotalCoeff <= 5'd13;
|
3'b111 :TotalCoeff <= 5'd13;
|
default :TotalCoeff <= 5'd15;
|
default :TotalCoeff <= 5'd15;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd13)
|
else if (heading_one_pos == 4'd13)
|
TotalCoeff <= (BitStream_buffer_output[1:0] == 2'b11)? 5'd15:5'd16;
|
TotalCoeff <= (BitStream_buffer_output[1:0] == 2'b11)? 5'd15:5'd16;
|
else
|
else
|
TotalCoeff <= 5'd13;
|
TotalCoeff <= 5'd13;
|
end
|
end
|
end
|
end
|
else if (nC_2to4)
|
else if (nC_2to4)
|
begin
|
begin
|
if (nC_2to4_t0)
|
if (nC_2to4_t0)
|
begin
|
begin
|
if (heading_one_pos == 4'd0)
|
if (heading_one_pos == 4'd0)
|
TotalCoeff <= {4'b0,~BitStream_buffer_output[14]};
|
TotalCoeff <= {4'b0,~BitStream_buffer_output[14]};
|
else
|
else
|
case (BitStream_buffer_output[13:12])
|
case (BitStream_buffer_output[13:12])
|
2'b00 :TotalCoeff <= 5'd4;
|
2'b00 :TotalCoeff <= 5'd4;
|
2'b01 :TotalCoeff <= 5'd3;
|
2'b01 :TotalCoeff <= 5'd3;
|
default:TotalCoeff <= 5'd2;
|
default:TotalCoeff <= 5'd2;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_2to4_t1)
|
else if (nC_2to4_t1)
|
begin
|
begin
|
if (heading_one_pos == 4'd2)
|
if (heading_one_pos == 4'd2)
|
case (BitStream_buffer_output[12:11])
|
case (BitStream_buffer_output[12:11])
|
2'b00:TotalCoeff <= (BitStream_buffer_output[10])? 5'd3:5'd6;
|
2'b00:TotalCoeff <= (BitStream_buffer_output[10])? 5'd3:5'd6;
|
2'b01:TotalCoeff <= (BitStream_buffer_output[10])? 5'd1:5'd3;
|
2'b01:TotalCoeff <= (BitStream_buffer_output[10])? 5'd1:5'd3;
|
2'b10:TotalCoeff <= 5'd5;
|
2'b10:TotalCoeff <= 5'd5;
|
2'b11:TotalCoeff <= 5'd2;
|
2'b11:TotalCoeff <= 5'd2;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[11:10])
|
case (BitStream_buffer_output[11:10])
|
2'b00 :TotalCoeff <= 5'd7;
|
2'b00 :TotalCoeff <= 5'd7;
|
2'b11 :TotalCoeff <= 5'd2;
|
2'b11 :TotalCoeff <= 5'd2;
|
default:TotalCoeff <= 5'd4;
|
default:TotalCoeff <= 5'd4;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_2to4_t2)
|
else if (nC_2to4_t2)
|
begin
|
begin
|
if (heading_one_pos == 4'd4)
|
if (heading_one_pos == 4'd4)
|
case (BitStream_buffer_output[10:9])
|
case (BitStream_buffer_output[10:9])
|
2'b00 :TotalCoeff <= 5'd8;
|
2'b00 :TotalCoeff <= 5'd8;
|
2'b11 :TotalCoeff <= 5'd3;
|
2'b11 :TotalCoeff <= 5'd3;
|
default:TotalCoeff <= 5'd5;
|
default:TotalCoeff <= 5'd5;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd5)
|
else if (heading_one_pos == 4'd5)
|
case (BitStream_buffer_output[9:8])
|
case (BitStream_buffer_output[9:8])
|
2'b00 :TotalCoeff <= 5'd5;
|
2'b00 :TotalCoeff <= 5'd5;
|
2'b11 :TotalCoeff <= 5'd4;
|
2'b11 :TotalCoeff <= 5'd4;
|
default:TotalCoeff <= 5'd6;
|
default:TotalCoeff <= 5'd6;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[8:7])
|
case (BitStream_buffer_output[8:7])
|
2'b00 :TotalCoeff <= 5'd9;
|
2'b00 :TotalCoeff <= 5'd9;
|
2'b11 :TotalCoeff <= 5'd6;
|
2'b11 :TotalCoeff <= 5'd6;
|
default:TotalCoeff <= 5'd7;
|
default:TotalCoeff <= 5'd7;
|
endcase
|
endcase
|
end
|
end
|
else if (nC_2to4_t3)
|
else if (nC_2to4_t3)
|
begin
|
begin
|
if (heading_one_pos == 4'd7)
|
if (heading_one_pos == 4'd7)
|
case (BitStream_buffer_output[7:5])
|
case (BitStream_buffer_output[7:5])
|
3'b000 :TotalCoeff <= 5'd11;
|
3'b000 :TotalCoeff <= 5'd11;
|
3'b001,3'b010:TotalCoeff <= 5'd9;
|
3'b001,3'b010:TotalCoeff <= 5'd9;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b111 :TotalCoeff <= 5'd7;
|
3'b111 :TotalCoeff <= 5'd7;
|
default :TotalCoeff <= 5'd8;
|
default :TotalCoeff <= 5'd8;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[6:4])
|
case (BitStream_buffer_output[6:4])
|
3'b000,3'b001,3'b010:TotalCoeff <= 5'd11;
|
3'b000,3'b001,3'b010:TotalCoeff <= 5'd11;
|
3'b100 :TotalCoeff <= 5'd12;
|
3'b100 :TotalCoeff <= 5'd12;
|
3'b111 :TotalCoeff <= 5'd9;
|
3'b111 :TotalCoeff <= 5'd9;
|
default :TotalCoeff <= 5'd10;
|
default :TotalCoeff <= 5'd10;
|
endcase
|
endcase
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if (heading_one_pos == 4'd9)
|
if (heading_one_pos == 4'd9)
|
case (BitStream_buffer_output[5:3])
|
case (BitStream_buffer_output[5:3])
|
3'b000 :TotalCoeff <= 5'd14;
|
3'b000 :TotalCoeff <= 5'd14;
|
3'b101,3'b110,3'b111:TotalCoeff <= 5'd12;
|
3'b101,3'b110,3'b111:TotalCoeff <= 5'd12;
|
default :TotalCoeff <= 5'd13;
|
default :TotalCoeff <= 5'd13;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd10)
|
else if (heading_one_pos == 4'd10)
|
TotalCoeff <= (BitStream_buffer_output[4:2] == 3'b0 || BitStream_buffer_output[4:2] == 3'b001 || BitStream_buffer_output[4:2] == 3'b010)? 5'd15:5'd14;
|
TotalCoeff <= (BitStream_buffer_output[4:2] == 3'b0 || BitStream_buffer_output[4:2] == 3'b001 || BitStream_buffer_output[4:2] == 3'b010)? 5'd15:5'd14;
|
else if (heading_one_pos == 4'd11)
|
else if (heading_one_pos == 4'd11)
|
TotalCoeff <= 5'd16;
|
TotalCoeff <= 5'd16;
|
else
|
else
|
TotalCoeff <= 5'd15;
|
TotalCoeff <= 5'd15;
|
end
|
end
|
end
|
end
|
else if (nC_n1)
|
else if (nC_n1)
|
begin
|
begin
|
if (nC_n1_t0)
|
if (nC_n1_t0)
|
begin
|
begin
|
if (BitStream_buffer_output[15]) TotalCoeff <= 5'd1;
|
if (BitStream_buffer_output[15]) TotalCoeff <= 5'd1;
|
else if (BitStream_buffer_output[14]) TotalCoeff <= 5'd0;
|
else if (BitStream_buffer_output[14]) TotalCoeff <= 5'd0;
|
else TotalCoeff <= 5'd2;
|
else TotalCoeff <= 5'd2;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if (heading_one_pos == 4'd3)
|
if (heading_one_pos == 4'd3)
|
case (BitStream_buffer_output[11:10])
|
case (BitStream_buffer_output[11:10])
|
2'b01 :TotalCoeff <= 5'd3;
|
2'b01 :TotalCoeff <= 5'd3;
|
2'b11 :TotalCoeff <= 5'd1;
|
2'b11 :TotalCoeff <= 5'd1;
|
default:TotalCoeff <= 5'd2;
|
default:TotalCoeff <= 5'd2;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd4)
|
else if (heading_one_pos == 4'd4)
|
TotalCoeff <= (BitStream_buffer_output[10])? 5'd3:5'd4;
|
TotalCoeff <= (BitStream_buffer_output[10])? 5'd3:5'd4;
|
else if (heading_one_pos == 4'd5)
|
else if (heading_one_pos == 4'd5)
|
TotalCoeff <= 5'd3;
|
TotalCoeff <= 5'd3;
|
else
|
else
|
TotalCoeff <= 5'd4;
|
TotalCoeff <= 5'd4;
|
end
|
end
|
end
|
end
|
else if (nC_4to8)
|
else if (nC_4to8)
|
begin
|
begin
|
if (nC_4to8_t0)
|
if (nC_4to8_t0)
|
TotalCoeff <= {2'b0,~BitStream_buffer_output[14:12]};
|
TotalCoeff <= {2'b0,~BitStream_buffer_output[14:12]};
|
else if (nC_4to8_t1)
|
else if (nC_4to8_t1)
|
begin
|
begin
|
if (heading_one_pos == 4'd1)
|
if (heading_one_pos == 4'd1)
|
case (BitStream_buffer_output[13:11])
|
case (BitStream_buffer_output[13:11])
|
3'b000,3'b001:TotalCoeff <= 5'd5;
|
3'b000,3'b001:TotalCoeff <= 5'd5;
|
3'b010,3'b011:TotalCoeff <= 5'd4;
|
3'b010,3'b011:TotalCoeff <= 5'd4;
|
3'b101 :TotalCoeff <= 5'd8;
|
3'b101 :TotalCoeff <= 5'd8;
|
3'b111 :TotalCoeff <= 5'd2;
|
3'b111 :TotalCoeff <= 5'd2;
|
default :TotalCoeff <= 5'd3;
|
default :TotalCoeff <= 5'd3;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd2)
|
else if (heading_one_pos == 4'd2)
|
case (BitStream_buffer_output[12:10])
|
case (BitStream_buffer_output[12:10])
|
3'b000 :TotalCoeff <= 5'd3;
|
3'b000 :TotalCoeff <= 5'd3;
|
3'b001,3'b010:TotalCoeff <= 5'd7;
|
3'b001,3'b010:TotalCoeff <= 5'd7;
|
3'b011 :TotalCoeff <= 5'd2;
|
3'b011 :TotalCoeff <= 5'd2;
|
3'b100 :TotalCoeff <= 5'd9;
|
3'b100 :TotalCoeff <= 5'd9;
|
3'b111 :TotalCoeff <= 5'd1;
|
3'b111 :TotalCoeff <= 5'd1;
|
default :TotalCoeff <= 5'd6;
|
default :TotalCoeff <= 5'd6;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd3)
|
else if (heading_one_pos == 4'd3)
|
case (BitStream_buffer_output[11:9])
|
case (BitStream_buffer_output[11:9])
|
3'b000 :TotalCoeff <= 5'd7;
|
3'b000 :TotalCoeff <= 5'd7;
|
3'b001 :TotalCoeff <= 5'd6;
|
3'b001 :TotalCoeff <= 5'd6;
|
3'b010 :TotalCoeff <= 5'd9;
|
3'b010 :TotalCoeff <= 5'd9;
|
3'b011 :TotalCoeff <= 5'd5;
|
3'b011 :TotalCoeff <= 5'd5;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b100 :TotalCoeff <= 5'd10;
|
3'b111 :TotalCoeff <= 5'd4;
|
3'b111 :TotalCoeff <= 5'd4;
|
default:TotalCoeff <= 5'd8;
|
default:TotalCoeff <= 5'd8;
|
endcase
|
endcase
|
else
|
else
|
case (BitStream_buffer_output[10:8])
|
case (BitStream_buffer_output[10:8])
|
3'b000 :TotalCoeff <= 5'd12;
|
3'b000 :TotalCoeff <= 5'd12;
|
3'b001,3'b100:TotalCoeff <= 5'd11;
|
3'b001,3'b100:TotalCoeff <= 5'd11;
|
3'b010,3'b101:TotalCoeff <= 5'd10;
|
3'b010,3'b101:TotalCoeff <= 5'd10;
|
3'b111 :TotalCoeff <= 5'd8;
|
3'b111 :TotalCoeff <= 5'd8;
|
default :TotalCoeff <= 5'd9;
|
default :TotalCoeff <= 5'd9;
|
endcase
|
endcase
|
end
|
end
|
else
|
else
|
begin
|
begin
|
if (heading_one_pos == 4'd5)
|
if (heading_one_pos == 4'd5)
|
case (BitStream_buffer_output[9:7])
|
case (BitStream_buffer_output[9:7])
|
3'b001,3'b100 :TotalCoeff <= 5'd13;
|
3'b001,3'b100 :TotalCoeff <= 5'd13;
|
3'b011,3'b110 :TotalCoeff <= 5'd11;
|
3'b011,3'b110 :TotalCoeff <= 5'd11;
|
3'b111 :TotalCoeff <= 5'd10;
|
3'b111 :TotalCoeff <= 5'd10;
|
default :TotalCoeff <= 5'd12;
|
default :TotalCoeff <= 5'd12;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd6)
|
else if (heading_one_pos == 4'd6)
|
case (BitStream_buffer_output[8:6])
|
case (BitStream_buffer_output[8:6])
|
3'b000 :TotalCoeff <= 5'd15;
|
3'b000 :TotalCoeff <= 5'd15;
|
3'b101,3'b110,3'b111:TotalCoeff <= 5'd13;
|
3'b101,3'b110,3'b111:TotalCoeff <= 5'd13;
|
default :TotalCoeff <= 5'd14;
|
default :TotalCoeff <= 5'd14;
|
endcase
|
endcase
|
else if (heading_one_pos == 4'd7)
|
else if (heading_one_pos == 4'd7)
|
TotalCoeff <= (BitStream_buffer_output[7:6] == 2'b00)? 5'd16:5'd15;
|
TotalCoeff <= (BitStream_buffer_output[7:6] == 2'b00)? 5'd16:5'd15;
|
else
|
else
|
TotalCoeff <= 5'd16;
|
TotalCoeff <= 5'd16;
|
end
|
end
|
end
|
end
|
else if (nC_GE8)
|
else if (nC_GE8)
|
begin
|
begin
|
if (heading_one_pos == 4'd4)
|
if (heading_one_pos == 4'd4)
|
TotalCoeff <= 5'd0;
|
TotalCoeff <= 5'd0;
|
else
|
else
|
TotalCoeff <= BitStream_buffer_output[15:12] + 1;
|
TotalCoeff <= BitStream_buffer_output[15:12] + 1;
|
end
|
end
|
else
|
else
|
TotalCoeff <= TotalCoeff_reg;
|
TotalCoeff <= TotalCoeff_reg;
|
|
|
