intra_pred_pe.v

a H.264/AVC Baseline Decoder

				end
			endcase
		else
			begin
				PE0_in0 <= 0;	PE0_in1 <= 0;	PE0_in2 <= 0;	PE0_in3 <= 0;
				PE0_IsShift 	<= 0;	PE0_IsStore 	<= 0;	PE0_IsClip 	  <= 0;
				PE0_full_bypass <= 0;	PE0_round_value <= 0;	PE0_shift_len <= 0;	
			end
	//----
	//PE1 |
	//----
	always @ (mb_type_general or blk4x4_rec_counter or blk4x4_intra_calculate_counter
		or Intra4x4_predmode or Intra16x16_predmode or Intra_chroma_predmode
		or blkAddrA_availability or mbAddrA_availability or mbAddrB_availability
		
		or Intra_mbAddrA_window0 or Intra_mbAddrA_window1 or Intra_mbAddrA_window2 or Intra_mbAddrA_window3
		or Intra_mbAddrB_window0 or Intra_mbAddrB_window1 or Intra_mbAddrB_window2 or Intra_mbAddrB_window3
		or Intra_mbAddrD_window
		
		or Intra_mbAddrA_reg4 or Intra_mbAddrA_reg5 or Intra_mbAddrA_reg6 or Intra_mbAddrA_reg7
		or Intra_mbAddrB_reg0 or Intra_mbAddrB_reg4 or Intra_mbAddrB_reg5 or Intra_mbAddrB_reg6
		or Intra_mbAddrB_reg7 or Intra_mbAddrB_reg8 or Intra_mbAddrB_reg12
		
		or PE1_out_reg 
		or blk4x4_pred_output0  or blk4x4_pred_output1 or blk4x4_pred_output2
		or blk4x4_pred_output8  or blk4x4_pred_output9 or blk4x4_pred_output12
		or blk4x4_pred_output13 or blk4x4_pred_output14
		or seed or b_ext or c_ext)
		//Intra 4x4																						  
		if (mb_type_general[3:2] == 2'b11 && blk4x4_rec_counter < 16)				
			case (Intra4x4_predmode)
				`Intra4x4_Vertical:	//---Vertical---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrB_window0;
						3:PE1_in0 <= Intra_mbAddrB_window1;
						2:PE1_in0 <= Intra_mbAddrB_window2;
						1:PE1_in0 <= Intra_mbAddrB_window3;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 	    <= 0; 	PE1_in2    	    <= 0;	PE1_in3 	  <= 0;	
					PE1_IsShift     <= 0;	PE1_IsStore     <= 0;	PE1_IsClip    <= 0;	
					PE1_full_bypass <= 1;	PE1_round_value <= 0;	PE1_shift_len <= 0;
				end
				`Intra4x4_Horizontal:	//---Horizontal---
				begin
					PE1_in0 <= (blk4x4_intra_calculate_counter != 0)? Intra_mbAddrA_window1:0;
					PE1_in1 	    <= 0; 	PE1_in2 		<= 0;	PE1_in3       <= 0; 	
					PE1_IsShift     <= 0;	PE1_IsStore     <= 0;	PE1_IsClip    <= 0;
					PE1_full_bypass <= 1;	PE1_round_value <= 0;	PE1_shift_len <= 0;
				end
				`Intra4x4_DC:			//---DC---
				begin
					PE1_in0 <= (blk4x4_intra_calculate_counter == 4 && blkAddrA_availability == 1)? 
								Intra_mbAddrA_window0:0;
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4 && blkAddrA_availability == 1)? 
								Intra_mbAddrA_window1:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 4 && blkAddrA_availability == 1)? 
								Intra_mbAddrA_window2:0;
					PE1_in3 <= (blk4x4_intra_calculate_counter == 4 && blkAddrA_availability == 1)? 
								Intra_mbAddrA_window3:0;
					PE1_IsStore <= (blk4x4_intra_calculate_counter == 4 && blkAddrA_availability == 1)? 1'b1:1'b0;
					PE1_full_bypass <= 1'b0;	PE1_IsShift   <= 0;	PE1_IsClip    <= 0;
					PE1_round_value <= 0;	PE1_shift_len <= 0;
				end
				`Intra4x4_Diagonal_Down_Left:	//---diagonal down-left---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrB_window1;
						3:PE1_in0 <= blk4x4_pred_output8;
						2:PE1_in0 <= blk4x4_pred_output12;
						1:PE1_in0 <= blk4x4_pred_output13;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrB_window3:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrB_window2:0;
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 4)? 1'b1:1'b0;
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;
					PE1_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'b00010:5'b0; // +2
					PE1_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'b010  :3'b0; // >>2
				end		
				`Intra4x4_Diagonal_Down_Right:	//---diagonal down-right---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrD_window;
						3:PE1_in0 <= blk4x4_pred_output0;
						2:PE1_in0 <= blk4x4_pred_output1;
						1:PE1_in0 <= blk4x4_pred_output2;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window1:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window0:0;
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 0)? 1'b0:1'b1;
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;	
					PE1_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 0)? 5'b0:5'b00010; // +2
					PE1_shift_len	<= (blk4x4_intra_calculate_counter == 0)? 3'b0:3'b010;   // >>2
				end
				`Intra4x4_Vertical_Right:		//---vertical right---
				begin
					case (blk4x4_intra_calculate_counter)
						4:begin	PE1_in0 <= Intra_mbAddrB_window0;	PE1_in1 <= Intra_mbAddrA_window0;
								PE1_in2 <= Intra_mbAddrD_window;				end
						3:begin	PE1_in0 <= Intra_mbAddrD_window;	 	PE1_in1 <= Intra_mbAddrB_window1;
								PE1_in2 <= Intra_mbAddrB_window0;				end
						2:begin	PE1_in0 <= Intra_mbAddrB_window0;	PE1_in1 <= Intra_mbAddrB_window2;
								PE1_in2 <= Intra_mbAddrB_window1;				end
						1:begin	PE1_in0 <= Intra_mbAddrB_window1;	PE1_in1 <= Intra_mbAddrB_window3;
								PE1_in2 <= Intra_mbAddrB_window2;				end		
						default:begin	PE1_in0 <= 0;PE1_in1 <= 0;PE1_in2 <= 0;	end
					endcase
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 0)? 1'b0:1'b1;
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;	PE1_full_bypass <= 1'b0;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 0)? 5'b0:5'b00010; // +2
					PE1_shift_len	<= (blk4x4_intra_calculate_counter == 0)? 3'b0:3'b010;   // >>2
				end
				`Intra4x4_Horizontal_Down:		//---horizontal down---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrA_window0;
						3:PE1_in0 <= Intra_mbAddrD_window;
						2:PE1_in0 <= blk4x4_pred_output0;
						1:PE1_in0 <= blk4x4_pred_output1;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4 || blk4x4_intra_calculate_counter == 3)?
								Intra_mbAddrA_window1:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 3)? Intra_mbAddrA_window0:0;
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 3)? 1'b1:1'b0;
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;
					PE1_full_bypass <= (blk4x4_intra_calculate_counter == 2 || 
										blk4x4_intra_calculate_counter == 1)? 1'b1:1'b0;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd1:
									   (blk4x4_intra_calculate_counter == 3)? 5'd2:5'd0; 
				 	PE1_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'd1:
									   (blk4x4_intra_calculate_counter == 3)? 3'd2:3'd0; 
				end
				`Intra4x4_Vertical_Left:			//---vertical left---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrB_window0;
						3:PE1_in0 <= blk4x4_pred_output12;
						2:PE1_in0 <= blk4x4_pred_output13;
						1:PE1_in0 <= blk4x4_pred_output14;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrB_window2:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrB_window1:0;
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 4)? 1'b1:1'b0; 
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;
					PE1_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd2:5'd0; // +2
					PE1_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'd2:3'd0; // >>2
				end
				`Intra4x4_Horizontal_Up:			//---horizontal up---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrA_window1;
						3:PE1_in0 <= Intra_mbAddrA_window1;
						2:PE1_in0 <= blk4x4_pred_output8;
						1:PE1_in0 <= blk4x4_pred_output9;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window2:
							   (blk4x4_intra_calculate_counter == 3)? Intra_mbAddrA_window3:0;
					PE1_in2 <= (blk4x4_intra_calculate_counter == 3)? Intra_mbAddrA_window2:0;
					PE1_in3 <= 0;
					PE1_IsShift <= (blk4x4_intra_calculate_counter == 3)? 1'b1:1'b0;
					PE1_IsStore <= 1'b0; PE1_IsClip <= 1'b0;	
					PE1_full_bypass <= (blk4x4_intra_calculate_counter == 2 || 
										blk4x4_intra_calculate_counter == 1)? 1'b1:1'b0;
					PE1_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd1:
									   (blk4x4_intra_calculate_counter == 3)? 5'd2:5'd0; 
				 	PE1_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'd1:
									   (blk4x4_intra_calculate_counter == 3)? 3'd2:3'd0; 
				end
				default:
				begin
					PE1_in0 <= 0;	PE1_in1 <= 0;	PE1_in2 <= 0;	PE1_in3 <= 0;
					PE1_IsShift 	<= 0;	PE1_IsStore 	<= 0;	PE1_IsClip 	  <= 0;
					PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;	
				end
			endcase
		//Intra16x16
		else if (mb_type_general[3:2] == 2'b10 && blk4x4_rec_counter < 16)
			case (Intra16x16_predmode)
				`Intra16x16_Vertical:	//---Vertical---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE1_in0 <= Intra_mbAddrB_window0;
						3:PE1_in0 <= Intra_mbAddrB_window1;
						2:PE1_in0 <= Intra_mbAddrB_window2;
						1:PE1_in0 <= Intra_mbAddrB_window3;
						default:PE1_in0 <= 0;
					endcase
					PE1_in1 		<= 0; 	PE1_in2 		<= 0;	PE1_in3       <= 0; 		
					PE1_IsShift 	<= 0;	PE1_IsStore 	<= 0;	PE1_IsClip 	  <= 0;
					PE1_full_bypass <= 1;	PE1_round_value <= 0;	PE1_shift_len <= 0;
				end
				`Intra16x16_Horizontal:	//---Horizontal---
				begin
					PE1_in0 <= (blk4x4_intra_calculate_counter != 0)? Intra_mbAddrA_window1:0;
					PE1_in1 		<= 0; 	PE1_in2 		<= 0;	PE1_in3 	  <= 0; 		
					PE1_IsShift 	<= 0;	PE1_IsStore 	<= 0;	PE1_IsClip    <= 0;
					PE1_full_bypass <= 1;	PE1_round_value <= 0;	PE1_shift_len <= 0;
				end
				`Intra16x16_DC:	//---DC---
				if (blk4x4_rec_counter == 0)
					case (blk4x4_intra_calculate_counter)
						4:begin		//	E2 + F2 + G2 + H2
							PE1_in0 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg4;
							PE1_in1 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg5;
							PE1_in2 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg6;
							PE1_in3 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg7;
							PE1_IsShift 	<= 0;	PE1_IsStore 	<= 1;	PE1_IsClip    <= 0;
							PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;	end
						3:begin		//	PE1 output + F1 + G1 + H1
							PE1_in0 <= PE1_out_reg;
							PE1_in1 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg5;
							PE1_in2 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg6;
							PE1_in3 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg7;
							PE1_IsShift 	<= 0;	PE1_IsStore 	<= 1;	PE1_IsClip 	  <= 0;
							PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;	end
						2:begin		//	A1 + E1 + I1 + M1
							PE1_in0 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg0;
							PE1_in1 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg4;
							PE1_in2 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg8;
							PE1_in3 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg12;
							PE1_IsShift 	<= 0;	PE1_IsStore 	<= 1;	PE1_IsClip 	  <= 0;
							PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;	end
						default:begin
							PE1_in0 <= 0;	PE1_in1 <= 0;	PE1_in2 <= 0;	PE1_in3 <= 0;
							PE1_IsShift 	<= 0;	PE1_IsStore 	<= 0;	PE1_IsClip 	  <= 0;
							PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;	end
					endcase
				else
					begin
						PE1_in0 <= 0;	PE1_in1 <= 0;	PE1_in2 <= 0;	PE1_in3 <= 0;
						PE1_IsShift 	<= 0;	PE1_IsStore 	<= 0;	PE1_IsClip 	  <= 0;
						PE1_full_bypass <= 0;	PE1_round_value <= 0;	PE1_shift_len <= 0;
					end
				`Intra16x16_Plane:	//---plane---
				begin
					if (blk4x4_intra_calculate_counter != 0)
						//blk0,2,4,6,8,10,12,14,calc counter == 3'b100:PE1_in0 <= seed;
						//other cases								  :PE1_in0 <= left pixel output
						PE1_in0 <= (blk4x4_intra_calculate_counter == 4 && blk4x4_rec_counter[0] == 1'b0)? 
									seed:PE1_out_reg;
					else
						PE1_in0 <= 0;
					if (blk4x4_intra_calculate_counter != 0)
						//blk0,2,8,10,calc counter == 3'b100:PE1_in1 <= c_ext x 2
						//other cases                       :PE1_in1 <= b_ext
						PE1_in1 <= (blk4x4_intra_calculate_counter == 4 && !blk4x4_rec_counter[2] && !blk4x4_rec_counter[0])? 
									{c_ext[14:0],1'b0}:b_ext;
					else
						PE1_in1 <= 0;
					//blk4,6,12,14,calc counter == 3'b100:PE1_in2 <= c_ext;
					//other cases						 :PE1_in2 <= 0
					PE1_in2	<= (blk4x4_intra_calculate_counter == 4 && blk4x4_rec_counter[2] && !blk4x4_rec_counter[0])?
								c_ext:0;
					PE1_in3	<= 0;
					PE1_IsShift	 	<= 1'b0;
					PE1_IsStore		<= (blk4x4_intra_calculate_counter != 0)? 1'b1:1'b0;
					PE1_IsClip 		<= (blk4x4_intra_calculate_counter != 0)? 1'b1:1'b0;
					PE1_full_bypass	<= 1'b0;
					PE1_round_value <= (blk4x4_intra_calculate_counter != 0)? 5'd16:5'd0;
					PE1_shift_len	<= (blk4x4_intra_calculate_counter != 0)? 3'd5 :3'd0;
				end
			endcase
		//Chroma
		else if (mb_type_general[3] == 1'b1 && blk4x4_rec_counter > 15)
			case (Intra_chroma_predmode)
				`Intra_chroma_DC:	//---DC---
				if (blk4x4_intra_calculate_counter == 4) 
					begin
						case ({mbAddrA_availability,mbAddrB_availability})
							2'b00,2'b01:
							begin
								PE1_in0 <= 0;	PE1_in1 <= 0;	PE1_in2 <= 0;	PE1_in3 <= 0;
							end
							2'b10:
							begin
								PE1_in0 <= Intra_mbAddrA_window0;	PE1_in1 <= Intra_mbAddrA_window1;
								PE1_in2 <= Intra_mbAddrA_window2;	PE1_in3 <= Intra_mbAddrA_window3;
							end
							2'b11:
							begin
								PE1_in0 <= (blk4x4_rec_counter == 17 || blk4x4_rec_counter == 21)?
											0:Intra_mbAddrA_window0;	
								PE1_in1 <= (blk4x4_rec_counter == 17 || blk4x4_rec_counter == 21)?
											0:Intra_mbAddrA_window1;