intra_pred_pe.v

a H.264/AVC Baseline Decoder

								PE1_in2 <= (blk4x4_rec_counter == 17 || blk4x4_rec_counter == 21)?
											0:Intra_mbAddrA_window2;	
								PE1_in3 <= (blk4x4_rec_counter == 17 || blk4x4_rec_counter == 21)?
											0:Intra_mbAddrA_window3;
							end
						endcase
						PE1_IsShift <= 1'b0; 	PE1_IsClip <= 1'b0;	
						PE1_IsStore <= (mbAddrA_availability)? 1'b1:1'b0;
						PE1_full_bypass <= 1'b0;
						PE1_round_value <= 0;	PE1_shift_len <= 0;
					end
				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
				`Intra_chroma_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
				`Intra_chroma_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
				`Intra_chroma_Plane:	//---plane---
				begin
					if (blk4x4_intra_calculate_counter != 0)
						//need seed,	   blk4x4 = 16 | 18 | 20 | 22
						//do not need seed,blk4x4 = 17 | 19 | 21 | 23
						PE1_in0 <= (blk4x4_rec_counter[0] == 1'b0 && blk4x4_intra_calculate_counter == 4)? 
									seed:PE1_out_reg;
					else
						PE1_in0 <= 0; 
					if (blk4x4_intra_calculate_counter != 0)
						PE1_in1 <= (blk4x4_rec_counter[0] == 1'b0 && blk4x4_intra_calculate_counter == 4)? 
									0:b_ext;
					else
						PE1_in1 <= 0;
					//0,2,8,10,the 4th cycle,+2c
					PE1_in2	<= (blk4x4_rec_counter[0] == 1'b0 && blk4x4_intra_calculate_counter == 4)? c_ext:0;
					PE1_in3	<= 0;
					PE1_IsShift <= (blk4x4_rec_counter[0] == 1'b0 && blk4x4_intra_calculate_counter == 4)? 
									1'b1:1'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
		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																		   
			
	//----
	//PE2 |
	//----
	always @ (mb_type_general or blk4x4_rec_counter or blk4x4_intra_calculate_counter
		or Intra4x4_predmode or Intra16x16_predmode or Intra_chroma_predmode
		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_mbAddrC_window0 or Intra_mbAddrC_window1
		
		or Intra_mbAddrA_reg8 or Intra_mbAddrA_reg9 or Intra_mbAddrA_reg10 or Intra_mbAddrA_reg11
		or Intra_mbAddrB_reg9 or Intra_mbAddrB_reg10 or Intra_mbAddrB_reg11
		or blk4x4_pred_output0  or blk4x4_pred_output1 or blk4x4_pred_output2	 
		or blk4x4_pred_output4  or blk4x4_pred_output5 or blk4x4_pred_output12
		or blk4x4_pred_output13 or blk4x4_pred_output14
		or PE2_out_reg 
		
		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:PE2_in0 <= Intra_mbAddrB_window0;
						3:PE2_in0 <= Intra_mbAddrB_window1;
						2:PE2_in0 <= Intra_mbAddrB_window2;
						1:PE2_in0 <= Intra_mbAddrB_window3;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 	    <= 0; 	PE2_in2    	    <= 0;	PE2_in3 	  <= 0;	
					PE2_IsShift     <= 0;	PE2_IsStore     <= 0;	PE2_IsClip    <= 0;	
					PE2_full_bypass <= 1;	PE2_round_value <= 0;	PE2_shift_len <= 0;
				end
				`Intra4x4_Horizontal:	//---Horizontal---
				begin
					PE2_in0 <= (blk4x4_intra_calculate_counter != 0)? Intra_mbAddrA_window2:0;
					PE2_in1 	    <= 0; 	PE2_in2 		<= 0;	PE2_in3       <= 0; 	
					PE2_IsShift     <= 0;	PE2_IsStore     <= 0;	PE2_IsClip    <= 0;
					PE2_full_bypass <= 1;	PE2_round_value <= 0;	PE2_shift_len <= 0;
				end
				//-------------
				//no PE2 for DC
				//4'b0010:
				//-------------
				`Intra4x4_Diagonal_Down_Left:	//---diagonal down-left---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE2_in0 <= Intra_mbAddrB_window2;
						3:PE2_in0 <= blk4x4_pred_output12;
						2:PE2_in0 <= blk4x4_pred_output13;
						1:PE2_in0 <= blk4x4_pred_output14;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrC_window0:0;
					PE2_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrB_window3:0;
					PE2_in3 <= 0;
					PE2_IsShift <= (blk4x4_intra_calculate_counter == 4)? 1'b1:1'b0;
					PE2_IsStore <= 1'b0; PE2_IsClip <= 1'b0;
					PE2_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE2_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd2:5'd0; // +2
					PE2_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'd2:3'd0; // >>2
				end		
				`Intra4x4_Diagonal_Down_Right:	//---diagonal down-right---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE2_in0 <= Intra_mbAddrA_window0;
						3:PE2_in0 <= blk4x4_pred_output4;
						2:PE2_in0 <= blk4x4_pred_output0;
						1:PE2_in0 <= blk4x4_pred_output1;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window2:0;
					PE2_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window1:0;
					PE2_in3 <= 0;
					PE2_IsShift <= (blk4x4_intra_calculate_counter == 0)? 1'b0:1'b1;
					PE2_IsStore <= 1'b0; PE2_IsClip <= 1'b0;	
					PE2_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE2_round_value <= (blk4x4_intra_calculate_counter == 0)? 5'd0:5'd2; // +2
					PE2_shift_len	<= (blk4x4_intra_calculate_counter == 0)? 3'd0:3'd2; // >>2
				end
				`Intra4x4_Vertical_Right:	//---vertical right---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE2_in0 <= Intra_mbAddrD_window;
						3:PE2_in0 <= blk4x4_pred_output0;
						2:PE2_in0 <= blk4x4_pred_output1;
						1:PE2_in0 <= blk4x4_pred_output2;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window1:0;
					PE2_in2 <= (blk4x4_intra_calculate_counter == 4)? Intra_mbAddrA_window0:0;
					PE2_in3 <= 0;
					PE2_IsShift <= (blk4x4_intra_calculate_counter == 0)? 1'b0:1'b1;
					PE2_IsStore <= 1'b0; PE2_IsClip <= 1'b0;	
					PE2_full_bypass <= (blk4x4_intra_calculate_counter == 4)? 1'b0:1'b1;
					PE2_round_value <= (blk4x4_intra_calculate_counter == 0)? 5'd0:5'd2; // +2
					PE2_shift_len	<= (blk4x4_intra_calculate_counter == 0)? 3'd0:3'd2; // >>2
				end
				`Intra4x4_Horizontal_Down:	//---horizontal down---
				begin
					case (blk4x4_intra_calculate_counter)
						4:PE2_in0 <= Intra_mbAddrA_window1;
						3:PE2_in0 <= Intra_mbAddrA_window0;
						2:PE2_in0 <= blk4x4_pred_output4;
						1:PE2_in0 <= blk4x4_pred_output5;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 <= (blk4x4_intra_calculate_counter == 4 || blk4x4_intra_calculate_counter == 3)?
								Intra_mbAddrA_window2:0;
					PE2_in2 <= (blk4x4_intra_calculate_counter == 3)? Intra_mbAddrA_window1:0;
					PE2_in3 <= 0;
					PE2_IsShift <= (blk4x4_intra_calculate_counter == 3)? 1'b1:1'b0;
					PE2_IsStore <= 1'b0; PE2_IsClip <= 1'b0;	
					PE2_full_bypass <= (blk4x4_intra_calculate_counter == 2 || 
										blk4x4_intra_calculate_counter == 1)? 1'b1:1'b0;
					PE2_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd1:
									   (blk4x4_intra_calculate_counter == 3)? 5'd2:5'd0; 
				 	PE2_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:PE2_in0 <= Intra_mbAddrB_window1;
						3:PE2_in0 <= Intra_mbAddrB_window3;
						2:PE2_in0 <= Intra_mbAddrB_window3;
						1:PE2_in0 <= Intra_mbAddrC_window1;
						default:PE2_in0 <= 0;
					endcase
					case (blk4x4_intra_calculate_counter)
						4,3:PE2_in1 <= Intra_mbAddrB_window2;
						2,1:PE2_in1 <= Intra_mbAddrC_window0;
						default:PE2_in1 <= 0;
					endcase
					PE2_in2 <= 0;		PE2_in3 <= 0;
					PE2_IsShift <= 0; 	PE2_IsStore <= 0; PE2_IsClip <= 1'b0;	PE2_full_bypass <= 1'b0;
					PE2_round_value <= (blk4x4_intra_calculate_counter != 0)? 5'd1:5'd0; // +1
					PE2_shift_len	<= (blk4x4_intra_calculate_counter != 0)? 3'd1:3'd0; // >>1
				end
				`Intra4x4_Horizontal_Up:		//---horizontal up---
				begin
					case (blk4x4_intra_calculate_counter)
						4,3:PE2_in0 <= Intra_mbAddrA_window2;
						2,1:PE2_in0 <= blk4x4_pred_output12;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 <= (blk4x4_intra_calculate_counter == 4 || blk4x4_intra_calculate_counter == 3)?
								Intra_mbAddrA_window3:0;
					PE2_in2 <= (blk4x4_intra_calculate_counter == 3)? Intra_mbAddrA_window3:0;
					PE2_in3 <= 0;
					PE2_IsShift <= (blk4x4_intra_calculate_counter == 3)? 1'b1:1'b0;
					PE2_IsStore <= 1'b0; PE2_IsClip <= 1'b0;	
					PE2_full_bypass <= (blk4x4_intra_calculate_counter == 2 || 
										blk4x4_intra_calculate_counter == 1)? 1'b1:1'b0;
					PE2_round_value <= (blk4x4_intra_calculate_counter == 4)? 5'd1:
									   (blk4x4_intra_calculate_counter == 3)? 5'd2:5'd0; 
				 	PE2_shift_len	<= (blk4x4_intra_calculate_counter == 4)? 3'd1:
									   (blk4x4_intra_calculate_counter == 3)? 3'd2:3'd0; 
				end
				default:
				begin
					PE2_in0 <= 0;	PE2_in1 <= 0;	PE2_in2 <= 0;	PE2_in3 <= 0;
					PE2_IsShift 	<= 0;	PE2_IsStore 	<= 0;	PE2_IsClip 	  <= 0;
					PE2_full_bypass <= 0;	PE2_round_value <= 0;	PE2_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:PE2_in0 <= Intra_mbAddrB_window0;
						3:PE2_in0 <= Intra_mbAddrB_window1;
						2:PE2_in0 <= Intra_mbAddrB_window2;
						1:PE2_in0 <= Intra_mbAddrB_window3;
						default:PE2_in0 <= 0;
					endcase
					PE2_in1 		<= 0; 	PE2_in2 		<= 0;	PE2_in3       <= 0; 		
					PE2_IsShift 	<= 0;	PE2_IsStore 	<= 0;	PE2_IsClip 	  <= 0;
					PE2_full_bypass <= 1;	PE2_round_value <= 0;	PE2_shift_len <= 0;
				end
				`Intra16x16_Horizontal:	//---Horizontal---
				begin
					PE2_in0 <= (blk4x4_intra_calculate_counter != 0)? Intra_mbAddrA_window2:0;
					PE2_in1 		<= 0; 	PE2_in2 		<= 0;	PE2_in3 	  <= 0; 		
					PE2_IsShift 	<= 0;	PE2_IsStore 	<= 0;	PE2_IsClip    <= 0;
					PE2_full_bypass <= 1;	PE2_round_value <= 0;	PE2_shift_len <= 0;
				end
				`Intra16x16_DC:	//---DC---
				if (blk4x4_rec_counter == 0)
					case (blk4x4_intra_calculate_counter)
						4:begin		//	I2 + J2 + K2 + L2
							PE2_in0 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg8;
							PE2_in1 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg9;
							PE2_in2 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg10;
							PE2_in3 <= (mbAddrA_availability == 0)? 0:Intra_mbAddrA_reg11;
							PE2_IsShift 	<= 0;	PE2_IsStore 	<= 1;	PE2_IsClip    <= 0;
							PE2_full_bypass <= 0;	PE2_round_value <= 0;	PE2_shift_len <= 0;	end
						3:begin		//	PE2 output + J1 + K1 + L1
							PE2_in0 <= PE2_out_reg;
							PE2_in1 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg9;
							PE2_in2 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg10;
							PE2_in3 <= (mbAddrB_availability == 0)? 0:Intra_mbAddrB_reg11;
							PE2_IsShift 	<= 0;	PE2_IsStore 	<= 1;	PE2_IsClip 	  <= 0;
							PE2_full_bypass <= 0;	PE2_round_value <= 0;	PE2_shift_len <= 0;	end
						default:begin
							PE2_in0 <= 0;	PE2_in1 <= 0;	PE2_in2 <= 0;	PE2_in3 <= 0;
							PE2_IsShift 	<= 0;	PE2_IsStore 	<= 0;	PE2_IsClip 	  <= 0;
							PE2_full_bypass <= 0;	PE2_round_value <= 0;	PE2_shift_len <= 0;	end
					endcase
				else
					begin
						PE2_in0 <= 0;	PE2_in1 <= 0;	PE2_in2 <= 0;	PE2_in3 <= 0;
						PE2_IsShift 	<= 0;	PE2_IsStore 	<= 0;	PE2_IsClip 	  <= 0;
						PE2_full_bypass <= 0;	PE2_round_value <= 0;	PE2_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:PE2_in0 <= seed;
						//other cases								  :PE2_in0 <= left pixel output
						PE2_in0 <= (blk4x4_intra_calculate_counter == 4 && blk4x4_rec_counter[0] == 1'b0)? 
									seed:PE2_out_reg;
					else