inter_pred_lpe.v

a H.264/AVC Baseline Decoder

//--------------------------------------------------------------------------------------------------
// Design    : nova
// Author(s) : Ke Xu
// Email	   : [e-mail]
// File      : Inter_pred_LPE.v
// Generated : Oct 11, 2005
// Copyright (C) 2008 Ke Xu                
//-------------------------------------------------------------------------------------------------
// Description 
// Processing Element for Inter prediction of Luma pixels
//-------------------------------------------------------------------------------------------------

// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "nova_defines.v"

module Inter_pred_LPE (clk,reset_n,pos_FracL,IsInterLuma,
	blk4x4_inter_calculate_counter,
	Inter_H_window_0_0,Inter_H_window_1_0,Inter_H_window_2_0,Inter_H_window_3_0,Inter_H_window_4_0,Inter_H_window_5_0,
	Inter_H_window_0_1,Inter_H_window_1_1,Inter_H_window_2_1,Inter_H_window_3_1,Inter_H_window_4_1,Inter_H_window_5_1,
	Inter_H_window_0_2,Inter_H_window_1_2,Inter_H_window_2_2,Inter_H_window_3_2,Inter_H_window_4_2,Inter_H_window_5_2,
	Inter_H_window_0_3,Inter_H_window_1_3,Inter_H_window_2_3,Inter_H_window_3_3,Inter_H_window_4_3,Inter_H_window_5_3,
	Inter_H_window_0_4,Inter_H_window_1_4,Inter_H_window_2_4,Inter_H_window_3_4,Inter_H_window_4_4,Inter_H_window_5_4,
	Inter_H_window_0_5,Inter_H_window_1_5,Inter_H_window_2_5,Inter_H_window_3_5,Inter_H_window_4_5,Inter_H_window_5_5,
	Inter_H_window_0_6,Inter_H_window_1_6,Inter_H_window_2_6,Inter_H_window_3_6,Inter_H_window_4_6,Inter_H_window_5_6,
	Inter_H_window_0_7,Inter_H_window_1_7,Inter_H_window_2_7,Inter_H_window_3_7,Inter_H_window_4_7,Inter_H_window_5_7,
	Inter_H_window_0_8,Inter_H_window_1_8,Inter_H_window_2_8,Inter_H_window_3_8,Inter_H_window_4_8,Inter_H_window_5_8,
	Inter_V_window_0,Inter_V_window_1,Inter_V_window_2,Inter_V_window_3,Inter_V_window_4,
	Inter_V_window_5,Inter_V_window_6,Inter_V_window_7,Inter_V_window_8,
	Inter_bi_window_0,Inter_bi_window_1,Inter_bi_window_2,Inter_bi_window_3,
	
	LPE0_out,LPE1_out,LPE2_out,LPE3_out
	);
	input clk,reset_n;
	input [3:0] pos_FracL;
	input IsInterLuma;
	input [3:0] blk4x4_inter_calculate_counter;
	
	input [7:0] Inter_H_window_0_0,Inter_H_window_1_0,Inter_H_window_2_0,Inter_H_window_3_0,Inter_H_window_4_0,Inter_H_window_5_0;
	input [7:0] Inter_H_window_0_1,Inter_H_window_1_1,Inter_H_window_2_1,Inter_H_window_3_1,Inter_H_window_4_1,Inter_H_window_5_1;
	input [7:0] Inter_H_window_0_2,Inter_H_window_1_2,Inter_H_window_2_2,Inter_H_window_3_2,Inter_H_window_4_2,Inter_H_window_5_2;
	input [7:0] Inter_H_window_0_3,Inter_H_window_1_3,Inter_H_window_2_3,Inter_H_window_3_3,Inter_H_window_4_3,Inter_H_window_5_3;
	input [7:0] Inter_H_window_0_4,Inter_H_window_1_4,Inter_H_window_2_4,Inter_H_window_3_4,Inter_H_window_4_4,Inter_H_window_5_4;
	input [7:0] Inter_H_window_0_5,Inter_H_window_1_5,Inter_H_window_2_5,Inter_H_window_3_5,Inter_H_window_4_5,Inter_H_window_5_5;
	input [7:0] Inter_H_window_0_6,Inter_H_window_1_6,Inter_H_window_2_6,Inter_H_window_3_6,Inter_H_window_4_6,Inter_H_window_5_6;
	input [7:0] Inter_H_window_0_7,Inter_H_window_1_7,Inter_H_window_2_7,Inter_H_window_3_7,Inter_H_window_4_7,Inter_H_window_5_7;
	input [7:0] Inter_H_window_0_8,Inter_H_window_1_8,Inter_H_window_2_8,Inter_H_window_3_8,Inter_H_window_4_8,Inter_H_window_5_8;
	input [7:0] Inter_V_window_0,Inter_V_window_1,Inter_V_window_2,Inter_V_window_3,Inter_V_window_4;
	input [7:0] Inter_V_window_5,Inter_V_window_6,Inter_V_window_7,Inter_V_window_8;
	input [7:0] Inter_bi_window_0,Inter_bi_window_1,Inter_bi_window_2,Inter_bi_window_3;
	
	output [7:0] LPE0_out,LPE1_out,LPE2_out,LPE3_out;
	
	reg [7:0] LPE0_out,LPE1_out,LPE2_out,LPE3_out;
	
	reg [14:0] b0_raw_reg,b1_raw_reg,b2_raw_reg,b3_raw_reg,b4_raw_reg,b5_raw_reg,b6_raw_reg,b7_raw_reg,b8_raw_reg;
	reg [7:0] b0_reg,b1_reg,b2_reg,b3_reg;
	reg [7:0] h0_reg,h1_reg,h2_reg,h3_reg;
	//------------------------
	//Vertical 6tap filter
	//------------------------
	wire Is_V_jfqik; //Is_V_jfqik: whether read from original [7:0] integer pixels and round as +16 >> 5 or read from b_raw[14:0] and round as +512 >> 10
	wire [14:0] V_6tapfilter0_A,V_6tapfilter0_B,V_6tapfilter0_C,V_6tapfilter0_D,V_6tapfilter0_E,V_6tapfilter0_F;	
	wire [14:0] V_6tapfilter1_A,V_6tapfilter1_B,V_6tapfilter1_C,V_6tapfilter1_D,V_6tapfilter1_E,V_6tapfilter1_F;
	wire [14:0] V_6tapfilter2_A,V_6tapfilter2_B,V_6tapfilter2_C,V_6tapfilter2_D,V_6tapfilter2_E,V_6tapfilter2_F;
	wire [14:0] V_6tapfilter3_A,V_6tapfilter3_B,V_6tapfilter3_C,V_6tapfilter3_D,V_6tapfilter3_E,V_6tapfilter3_F;
	wire [7:0] V_6tapfilter0_round_out,V_6tapfilter1_round_out,V_6tapfilter2_round_out,V_6tapfilter3_round_out;
	filterV_6tap V_6tapfilter0 (
		.A(V_6tapfilter0_A),
		.B(V_6tapfilter0_B),
		.C(V_6tapfilter0_C),
		.D(V_6tapfilter0_D),
		.E(V_6tapfilter0_E),
		.F(V_6tapfilter0_F),
		.Is_jfqik(Is_V_jfqik),
		.round_out(V_6tapfilter0_round_out)
		);
	filterV_6tap V_6tapfilter1 (
		.A(V_6tapfilter1_A),
		.B(V_6tapfilter1_B),
		.C(V_6tapfilter1_C),
		.D(V_6tapfilter1_D),
		.E(V_6tapfilter1_E),
		.F(V_6tapfilter1_F),
		.Is_jfqik(Is_V_jfqik),
		.round_out(V_6tapfilter1_round_out)
		);
	filterV_6tap V_6tapfilter2 (
		.A(V_6tapfilter2_A),
		.B(V_6tapfilter2_B),
		.C(V_6tapfilter2_C),
		.D(V_6tapfilter2_D),
		.E(V_6tapfilter2_E),
		.F(V_6tapfilter2_F),
		.Is_jfqik(Is_V_jfqik),
		.round_out(V_6tapfilter2_round_out)
		);
	filterV_6tap V_6tapfilter3 (
		.A(V_6tapfilter3_A),
		.B(V_6tapfilter3_B),
		.C(V_6tapfilter3_C),
		.D(V_6tapfilter3_D),
		.E(V_6tapfilter3_E),
		.F(V_6tapfilter3_F),
		.Is_jfqik(Is_V_jfqik),
		.round_out(V_6tapfilter3_round_out)
		);
	assign Is_V_jfqik = (
	(pos_FracL == `pos_j && (
			blk4x4_inter_calculate_counter == 4'd4 || blk4x4_inter_calculate_counter == 4'd3 ||
			blk4x4_inter_calculate_counter == 4'd2 || blk4x4_inter_calculate_counter == 4'd1)) 	||
	((pos_FracL == `pos_f || pos_FracL == `pos_q) && (	
			blk4x4_inter_calculate_counter == 4'd4 || blk4x4_inter_calculate_counter == 4'd3 ||
			blk4x4_inter_calculate_counter == 4'd2 || blk4x4_inter_calculate_counter == 4'd1))	||
	((pos_FracL == `pos_i || pos_FracL == `pos_k) && (	
			blk4x4_inter_calculate_counter == 4'd7 || blk4x4_inter_calculate_counter == 4'd5 ||
			blk4x4_inter_calculate_counter == 4'd3 || blk4x4_inter_calculate_counter == 4'd1)))? 1'b1:1'b0;	
	
	assign V_6tapfilter0_A = (Is_V_jfqik)? b0_raw_reg:{7'b0,Inter_V_window_0};
	assign V_6tapfilter0_B = (Is_V_jfqik)? b1_raw_reg:{7'b0,Inter_V_window_1};
	assign V_6tapfilter0_C = (Is_V_jfqik)? b2_raw_reg:{7'b0,Inter_V_window_2};
	assign V_6tapfilter0_D = (Is_V_jfqik)? b3_raw_reg:{7'b0,Inter_V_window_3};
	assign V_6tapfilter0_E = (Is_V_jfqik)? b4_raw_reg:{7'b0,Inter_V_window_4};
	assign V_6tapfilter0_F = (Is_V_jfqik)? b5_raw_reg:{7'b0,Inter_V_window_5};
	
	assign V_6tapfilter1_A = (Is_V_jfqik)? b1_raw_reg:{7'b0,Inter_V_window_1};
	assign V_6tapfilter1_B = (Is_V_jfqik)? b2_raw_reg:{7'b0,Inter_V_window_2};
	assign V_6tapfilter1_C = (Is_V_jfqik)? b3_raw_reg:{7'b0,Inter_V_window_3};
	assign V_6tapfilter1_D = (Is_V_jfqik)? b4_raw_reg:{7'b0,Inter_V_window_4};
	assign V_6tapfilter1_E = (Is_V_jfqik)? b5_raw_reg:{7'b0,Inter_V_window_5};
	assign V_6tapfilter1_F = (Is_V_jfqik)? b6_raw_reg:{7'b0,Inter_V_window_6};
	
	assign V_6tapfilter2_A = (Is_V_jfqik)? b2_raw_reg:{7'b0,Inter_V_window_2};
	assign V_6tapfilter2_B = (Is_V_jfqik)? b3_raw_reg:{7'b0,Inter_V_window_3};
	assign V_6tapfilter2_C = (Is_V_jfqik)? b4_raw_reg:{7'b0,Inter_V_window_4};
	assign V_6tapfilter2_D = (Is_V_jfqik)? b5_raw_reg:{7'b0,Inter_V_window_5};
	assign V_6tapfilter2_E = (Is_V_jfqik)? b6_raw_reg:{7'b0,Inter_V_window_6};
	assign V_6tapfilter2_F = (Is_V_jfqik)? b7_raw_reg:{7'b0,Inter_V_window_7};
	
	assign V_6tapfilter3_A = (Is_V_jfqik)? b3_raw_reg:{7'b0,Inter_V_window_3};
	assign V_6tapfilter3_B = (Is_V_jfqik)? b4_raw_reg:{7'b0,Inter_V_window_4};
	assign V_6tapfilter3_C = (Is_V_jfqik)? b5_raw_reg:{7'b0,Inter_V_window_5};
	assign V_6tapfilter3_D = (Is_V_jfqik)? b6_raw_reg:{7'b0,Inter_V_window_6};
	assign V_6tapfilter3_E = (Is_V_jfqik)? b7_raw_reg:{7'b0,Inter_V_window_7};
	assign V_6tapfilter3_F = (Is_V_jfqik)? b8_raw_reg:{7'b0,Inter_V_window_8};
			
	//------------------------
	//Horizontal 6tap filter
	//------------------------
	wire H_need_round;
	wire [14:0] H_6tapfilter0_raw_out;
	wire [14:0] H_6tapfilter1_raw_out;
	wire [14:0] H_6tapfilter2_raw_out;
	wire [14:0] H_6tapfilter3_raw_out;
	wire [14:0] H_6tapfilter4_raw_out;
	wire [14:0] H_6tapfilter5_raw_out;
	wire [14:0] H_6tapfilter6_raw_out;
	wire [14:0] H_6tapfilter7_raw_out;
	wire [14:0] H_6tapfilter8_raw_out;
	wire [7:0]  H_6tapfilter0_round_out;
	wire [7:0]  H_6tapfilter1_round_out;
	wire [7:0]  H_6tapfilter2_round_out;
	wire [7:0]  H_6tapfilter3_round_out;
	wire [7:0]  H_6tapfilter4_round_out;
	wire [7:0]  H_6tapfilter5_round_out;
	wire [7:0]  H_6tapfilter6_round_out;
	wire [7:0]  H_6tapfilter7_round_out;
	wire [7:0]  H_6tapfilter8_round_out;
	
	assign H_need_round = (blk4x4_inter_calculate_counter != 0 && pos_FracL != `pos_Int && pos_FracL != `pos_i 
	&& pos_FracL != `pos_j && pos_FracL != `pos_k && pos_FracL != `pos_d && pos_FracL != `pos_n); 
	
	filterH_6tap H_6tapfilter0 (
		.A(Inter_H_window_0_0),
		.B(Inter_H_window_1_0),
		.C(Inter_H_window_2_0),
		.D(Inter_H_window_3_0),
		.E(Inter_H_window_4_0),
		.F(Inter_H_window_5_0),
		.H_need_round(1'b0),
		.raw_out(H_6tapfilter0_raw_out),
		.round_out(H_6tapfilter0_round_out)
		);
	filterH_6tap H_6tapfilter1 (
		.A(Inter_H_window_0_1),
		.B(Inter_H_window_1_1),
		.C(Inter_H_window_2_1),
		.D(Inter_H_window_3_1),
		.E(Inter_H_window_4_1),
		.F(Inter_H_window_5_1),
		.H_need_round(1'b0),
		.raw_out(H_6tapfilter1_raw_out),
		.round_out(H_6tapfilter1_round_out)
		);
	filterH_6tap H_6tapfilter2 (
		.A(Inter_H_window_0_2),
		.B(Inter_H_window_1_2),
		.C(Inter_H_window_2_2),
		.D(Inter_H_window_3_2),
		.E(Inter_H_window_4_2),
		.F(Inter_H_window_5_2),
		.H_need_round(H_need_round),
		.raw_out(H_6tapfilter2_raw_out),
		.round_out(H_6tapfilter2_round_out)
		);
	filterH_6tap H_6tapfilter3 (
		.A(Inter_H_window_0_3),
		.B(Inter_H_window_1_3),
		.C(Inter_H_window_2_3),
		.D(Inter_H_window_3_3),
		.E(Inter_H_window_4_3),
		.F(Inter_H_window_5_3),
		.H_need_round(H_need_round),
		.raw_out(H_6tapfilter3_raw_out),
		.round_out(H_6tapfilter3_round_out)
		);
	filterH_6tap H_6tapfilter4 (
		.A(Inter_H_window_0_4),
		.B(Inter_H_window_1_4),
		.C(Inter_H_window_2_4),
		.D(Inter_H_window_3_4),
		.E(Inter_H_window_4_4),
		.F(Inter_H_window_5_4),
		.H_need_round(H_need_round),
		.raw_out(H_6tapfilter4_raw_out),
		.round_out(H_6tapfilter4_round_out)
		);
	filterH_6tap H_6tapfilter5 (
		.A(Inter_H_window_0_5),
		.B(Inter_H_window_1_5),
		.C(Inter_H_window_2_5),
		.D(Inter_H_window_3_5),
		.E(Inter_H_window_4_5),
		.F(Inter_H_window_5_5),
		.H_need_round(H_need_round),
		.raw_out(H_6tapfilter5_raw_out),
		.round_out(H_6tapfilter5_round_out)
		);
	filterH_6tap H_6tapfilter6 (
		.A(Inter_H_window_0_6),
		.B(Inter_H_window_1_6),
		.C(Inter_H_window_2_6),
		.D(Inter_H_window_3_6),
		.E(Inter_H_window_4_6),
		.F(Inter_H_window_5_6),
		.H_need_round(H_need_round),
		.raw_out(H_6tapfilter6_raw_out),
		.round_out(H_6tapfilter6_round_out)
		);
	filterH_6tap H_6tapfilter7 (
		.A(Inter_H_window_0_7),
		.B(Inter_H_window_1_7),
		.C(Inter_H_window_2_7),
		.D(Inter_H_window_3_7),
		.E(Inter_H_window_4_7),
		.F(Inter_H_window_5_7),
		.H_need_round(1'b0),
		.raw_out(H_6tapfilter7_raw_out),
		.round_out(H_6tapfilter7_round_out)
		);
	filterH_6tap H_6tapfilter8 (
		.A(Inter_H_window_0_8),
		.B(Inter_H_window_1_8),
		.C(Inter_H_window_2_8),
		.D(Inter_H_window_3_8),
		.E(Inter_H_window_4_8),
		.F(Inter_H_window_5_8),
		.H_need_round(1'b0),
		.raw_out(H_6tapfilter8_raw_out),
		.round_out(H_6tapfilter8_round_out)
		);
	
	//--------------------
	//bilinear filter
	//--------------------
	reg [7:0] bilinear0_A,bilinear0_B;
	reg [7:0] bilinear1_A,bilinear1_B;
	reg [7:0] bilinear2_A,bilinear2_B;
	reg [7:0] bilinear3_A,bilinear3_B;
	wire [7:0] bilinear0_out;
	wire [7:0] bilinear1_out;
	wire [7:0] bilinear2_out; 
	wire [7:0] bilinear3_out;
	bilinear bilinear0 (
		.A(bilinear0_A),
		.B(bilinear0_B),
		.bilinear_out(bilinear0_out)
		);
	bilinear bilinear1 (
		.A(bilinear1_A),
		.B(bilinear1_B),
		.bilinear_out(bilinear1_out)
		);
	bilinear bilinear2 (
		.A(bilinear2_A),