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eexuke |
//--------------------------------------------------------------------------------------------------
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// Design : nova
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// Author(s) : Ke Xu
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// Email : eexuke@yahoo.com
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// File : Inter_pred_pipeline.v
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// Generated : Oct 4, 2005
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// Copyright (C) 2008 Ke Xu
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//-------------------------------------------------------------------------------------------------
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// Description
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// Inter prediction pipeline
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//-------------------------------------------------------------------------------------------------
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// Revise log
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// 1.July 23,2006
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// Change the ext_frame_RAM from async read to sync read.Therefore,blk4x4_inter_preload_counter has to +1 for all the cases
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//-------------------------------------------------------------------------------------------------
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// synopsys translate_off
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`include "timescale.v"
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// synopsys translate_on
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`include "nova_defines.v"
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module Inter_pred_pipeline (clk,reset_n,
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mb_num_h,mb_num_v,trigger_blk4x4_inter_pred,blk4x4_rec_counter,mb_type_general_bit3,
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mv_is16x16,mv_below8x8,
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mvx_CurrMb0,mvx_CurrMb1,mvx_CurrMb2,mvx_CurrMb3,
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mvy_CurrMb0,mvy_CurrMb1,mvy_CurrMb2,mvy_CurrMb3,
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Inter_pix_copy0,Inter_pix_copy1,Inter_pix_copy2,Inter_pix_copy3,
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LPE0_out,LPE1_out,LPE2_out,LPE3_out,
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CPE0_out,CPE1_out,CPE2_out,CPE3_out,
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mv_below8x8_curr,blk4x4_inter_preload_counter,blk4x4_inter_calculate_counter,Inter_chroma2x2_counter,
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end_of_one_blk4x4_inter,IsInterLuma,IsInterChroma,Is_InterChromaCopy,
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xInt_addr_unclip,xInt_org_unclip_1to0,pos_FracL,xFracC,yFracC,
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Inter_pred_out0,Inter_pred_out1,Inter_pred_out2,Inter_pred_out3,Inter_blk4x4_pred_output_valid,
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ref_frame_RAM_rd,ref_frame_RAM_rd_addr);
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input clk;
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input reset_n;
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input [3:0] mb_num_h,mb_num_v;
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input trigger_blk4x4_inter_pred;
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input [4:0] blk4x4_rec_counter;
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input mb_type_general_bit3;
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input mv_is16x16;
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input [3:0] mv_below8x8;
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input [31:0] mvx_CurrMb0,mvx_CurrMb1,mvx_CurrMb2,mvx_CurrMb3;
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input [31:0] mvy_CurrMb0,mvy_CurrMb1,mvy_CurrMb2,mvy_CurrMb3;
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input [7:0] Inter_pix_copy0,Inter_pix_copy1,Inter_pix_copy2,Inter_pix_copy3;
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input [7:0] LPE0_out,LPE1_out,LPE2_out,LPE3_out;
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input [7:0] CPE0_out,CPE1_out,CPE2_out,CPE3_out;
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output mv_below8x8_curr;
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output [5:0] blk4x4_inter_preload_counter;
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output [3:0] blk4x4_inter_calculate_counter;
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output [1:0] Inter_chroma2x2_counter;
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output end_of_one_blk4x4_inter;
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output IsInterLuma,IsInterChroma;
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output Is_InterChromaCopy;
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output [8:0] xInt_addr_unclip;
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output [1:0] xInt_org_unclip_1to0;
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output [3:0] pos_FracL;
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output [2:0] xFracC,yFracC;
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output [7:0] Inter_pred_out0,Inter_pred_out1,Inter_pred_out2,Inter_pred_out3;
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output [1:0] Inter_blk4x4_pred_output_valid; //2'b01:luma output valid 2'b10:chroma output valid
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output ref_frame_RAM_rd;
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output [13:0] ref_frame_RAM_rd_addr;
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reg [5:0] blk4x4_inter_preload_counter;
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reg [3:0] blk4x4_inter_calculate_counter;
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reg mv_below8x8_curr;
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reg [7:0] Inter_pred_out0,Inter_pred_out1,Inter_pred_out2,Inter_pred_out3;
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reg [1:0] Inter_blk4x4_pred_output_valid;
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wire ref_frame_RAM_rd;
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wire IsInterLuma;
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wire IsInterChroma;
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wire [1:0] xFracL;
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wire [1:0] yFracL;
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wire [2:0] xFracC;
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wire [2:0] yFracC;
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wire [13:0] ref_frame_RAM_rd_addr;
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assign IsInterLuma = (!mb_type_general_bit3 && blk4x4_rec_counter < 16)? 1'b1:1'b0;
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assign IsInterChroma = (!mb_type_general_bit3 && blk4x4_rec_counter > 15)? 1'b1:1'b0;
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//-------------------------------------------------------------------------
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//mv_below8x8_curr for each 2x2 Inter Chroma prediction
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//-------------------------------------------------------------------------
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always @ (IsInterLuma or IsInterChroma or blk4x4_rec_counter[3:0] or mv_below8x8)
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if (IsInterLuma)
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case (blk4x4_rec_counter[3:2])
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2'b00:mv_below8x8_curr <= mv_below8x8[0];
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2'b01:mv_below8x8_curr <= mv_below8x8[1];
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2'b10:mv_below8x8_curr <= mv_below8x8[2];
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2'b11:mv_below8x8_curr <= mv_below8x8[3];
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endcase
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else if (IsInterChroma)
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case (blk4x4_rec_counter[1:0])
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2'b00:mv_below8x8_curr <= mv_below8x8[0];
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2'b01:mv_below8x8_curr <= mv_below8x8[1];
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2'b10:mv_below8x8_curr <= mv_below8x8[2];
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2'b11:mv_below8x8_curr <= mv_below8x8[3];
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endcase
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else
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mv_below8x8_curr <= 0;
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//----------------------------------------------------------------------------------------
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//Inter_chroma2x2_counter to guide the prediction of 2x2 chroma blocks
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//2'b11 -> 2'b10 -> 2'b01 -> 2'b00
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//----------------------------------------------------------------------------------------
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reg [1:0] Inter_chroma2x2_counter;
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always @ (posedge clk)
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if (reset_n == 1'b0)
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Inter_chroma2x2_counter <= 0;
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//mv_below8x8_curr == 1'b1 includes the condition that "blk4x4_rec_counter > 15"
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else if (IsInterChroma && trigger_blk4x4_inter_pred && mv_below8x8_curr)
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Inter_chroma2x2_counter <= 2'b11;
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else if (blk4x4_inter_calculate_counter == 4'd1 && Inter_chroma2x2_counter != 0)
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Inter_chroma2x2_counter <= Inter_chroma2x2_counter - 1;
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//----------------------------------------------------------------------------------------
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//trigger_blk2x2_inter_pred:only for chroma 2x2 decoding
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//We introduce this additional signal since we need Inter_chroma2x2_counter to update
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//one cycle before blk4x4_inter_calculate_counter
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//----------------------------------------------------------------------------------------
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reg trigger_blk2x2_inter_pred;
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always @ (posedge clk)
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if (reset_n == 1'b0)
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trigger_blk2x2_inter_pred <= 0;
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else if ((IsInterChroma && trigger_blk4x4_inter_pred && mv_below8x8_curr) ||
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(blk4x4_inter_calculate_counter == 4'd1 && Inter_chroma2x2_counter != 0))
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trigger_blk2x2_inter_pred <= 1'b1;
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else
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trigger_blk2x2_inter_pred <= 1'b0;
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//----------------------------------------------------------------------------------------
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//Inter motion vector for current 4x4 luma/chroma block or 2x2 chroma block
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// Inter_blk_mvx,Inter_blk_mvy
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//----------------------------------------------------------------------------------------
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reg [7:0] Inter_blk_mvx,Inter_blk_mvy;
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always @ (blk4x4_rec_counter or mv_below8x8_curr or Inter_chroma2x2_counter
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or IsInterLuma or IsInterChroma or mv_is16x16
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or mvx_CurrMb0 or mvx_CurrMb1 or mvx_CurrMb2 or mvx_CurrMb3
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or mvy_CurrMb0 or mvy_CurrMb1 or mvy_CurrMb2 or mvy_CurrMb3)
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//Inter luma
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if (IsInterLuma)
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begin
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if (mv_is16x16)
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begin Inter_blk_mvx <= mvx_CurrMb0[7:0]; Inter_blk_mvy <= mvy_CurrMb0[7:0]; end
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else
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case (mv_below8x8_curr)
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1'b0:
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case (blk4x4_rec_counter[3:2])
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2'b00:begin Inter_blk_mvx <= mvx_CurrMb0[7:0]; Inter_blk_mvy <= mvy_CurrMb0[7:0]; end
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2'b01:begin Inter_blk_mvx <= mvx_CurrMb1[7:0]; Inter_blk_mvy <= mvy_CurrMb1[7:0]; end
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2'b10:begin Inter_blk_mvx <= mvx_CurrMb2[7:0]; Inter_blk_mvy <= mvy_CurrMb2[7:0]; end
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2'b11:begin Inter_blk_mvx <= mvx_CurrMb3[7:0]; Inter_blk_mvy <= mvy_CurrMb3[7:0]; end
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endcase
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1'b1:
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case (blk4x4_rec_counter)
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1 :begin Inter_blk_mvx <= mvx_CurrMb0[15:8]; Inter_blk_mvy <= mvy_CurrMb0[15:8]; end
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2 :begin Inter_blk_mvx <= mvx_CurrMb0[23:16];Inter_blk_mvy <= mvy_CurrMb0[23:16]; end
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3 :begin Inter_blk_mvx <= mvx_CurrMb0[31:24];Inter_blk_mvy <= mvy_CurrMb0[31:24]; end
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4 :begin Inter_blk_mvx <= mvx_CurrMb1[7:0]; Inter_blk_mvy <= mvy_CurrMb1[7:0]; end
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5 :begin Inter_blk_mvx <= mvx_CurrMb1[15:8]; Inter_blk_mvy <= mvy_CurrMb1[15:8]; end
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6 :begin Inter_blk_mvx <= mvx_CurrMb1[23:16];Inter_blk_mvy <= mvy_CurrMb1[23:16]; end
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7 :begin Inter_blk_mvx <= mvx_CurrMb1[31:24];Inter_blk_mvy <= mvy_CurrMb1[31:24]; end
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8 :begin Inter_blk_mvx <= mvx_CurrMb2[7:0]; Inter_blk_mvy <= mvy_CurrMb2[7:0]; end
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9 :begin Inter_blk_mvx <= mvx_CurrMb2[15:8]; Inter_blk_mvy <= mvy_CurrMb2[15:8]; end
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10:begin Inter_blk_mvx <= mvx_CurrMb2[23:16];Inter_blk_mvy <= mvy_CurrMb2[23:16]; end
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11:begin Inter_blk_mvx <= mvx_CurrMb2[31:24];Inter_blk_mvy <= mvy_CurrMb2[31:24]; end
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12:begin Inter_blk_mvx <= mvx_CurrMb3[7:0]; Inter_blk_mvy <= mvy_CurrMb3[7:0]; end
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13:begin Inter_blk_mvx <= mvx_CurrMb3[15:8]; Inter_blk_mvy <= mvy_CurrMb3[15:8]; end
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14:begin Inter_blk_mvx <= mvx_CurrMb3[23:16];Inter_blk_mvy <= mvy_CurrMb3[23:16]; end
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15:begin Inter_blk_mvx <= mvx_CurrMb3[31:24];Inter_blk_mvy <= mvy_CurrMb3[31:24]; end
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default:begin Inter_blk_mvx <= 0;Inter_blk_mvy <= 0; end
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endcase
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endcase
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end
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//Inter chroma
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else if (IsInterChroma)
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begin
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if (mv_is16x16)
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begin Inter_blk_mvx <= mvx_CurrMb0[7:0]; Inter_blk_mvy <= mvy_CurrMb0[7:0]; end
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else
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case (blk4x4_rec_counter[1:0])
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2'b00:
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if (mv_below8x8_curr) //chroma2x2 prediction
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case (Inter_chroma2x2_counter)
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3:begin Inter_blk_mvx <= mvx_CurrMb0[7:0]; Inter_blk_mvy <= mvy_CurrMb0[7:0]; end
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2:begin Inter_blk_mvx <= mvx_CurrMb0[15:8]; Inter_blk_mvy <= mvy_CurrMb0[15:8]; end
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1:begin Inter_blk_mvx <= mvx_CurrMb0[23:16];Inter_blk_mvy <= mvy_CurrMb0[23:16]; end
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0:begin Inter_blk_mvx <= mvx_CurrMb0[31:24];Inter_blk_mvy <= mvy_CurrMb0[31:24]; end
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endcase
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else //chroma 4x4 prediction
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begin Inter_blk_mvx <= mvx_CurrMb0[7:0]; Inter_blk_mvy <= mvy_CurrMb0[7:0]; end
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2'b01:
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if (mv_below8x8_curr) //need chroma2x2 prediction
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case (Inter_chroma2x2_counter)
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3:begin Inter_blk_mvx <= mvx_CurrMb1[7:0]; Inter_blk_mvy <= mvy_CurrMb1[7:0]; end
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2:begin Inter_blk_mvx <= mvx_CurrMb1[15:8]; Inter_blk_mvy <= mvy_CurrMb1[15:8]; end
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1:begin Inter_blk_mvx <= mvx_CurrMb1[23:16];Inter_blk_mvy <= mvy_CurrMb1[23:16]; end
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0:begin Inter_blk_mvx <= mvx_CurrMb1[31:24];Inter_blk_mvy <= mvy_CurrMb1[31:24]; end
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endcase
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else //chroma 4x4 prediction
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begin Inter_blk_mvx <= mvx_CurrMb1[7:0]; Inter_blk_mvy <= mvy_CurrMb1[7:0]; end
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2'b10:
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if (mv_below8x8_curr) //chroma2x2 prediction
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case (Inter_chroma2x2_counter)
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3:begin Inter_blk_mvx <= mvx_CurrMb2[7:0]; Inter_blk_mvy <= mvy_CurrMb2[7:0]; end
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2:begin Inter_blk_mvx <= mvx_CurrMb2[15:8]; Inter_blk_mvy <= mvy_CurrMb2[15:8]; end
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1:begin Inter_blk_mvx <= mvx_CurrMb2[23:16];Inter_blk_mvy <= mvy_CurrMb2[23:16]; end
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0:begin Inter_blk_mvx <= mvx_CurrMb2[31:24];Inter_blk_mvy <= mvy_CurrMb2[31:24]; end
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endcase
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else //chroma 4x4 prediction
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begin Inter_blk_mvx <= mvx_CurrMb2[7:0]; Inter_blk_mvy <= mvy_CurrMb2[7:0]; end
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2'b11:
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if (mv_below8x8_curr) //chroma2x2 prediction
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case (Inter_chroma2x2_counter)
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3:begin Inter_blk_mvx <= mvx_CurrMb3[7:0]; Inter_blk_mvy <= mvy_CurrMb3[7:0]; end
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2:begin Inter_blk_mvx <= mvx_CurrMb3[15:8]; Inter_blk_mvy <= mvy_CurrMb3[15:8]; end
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1:begin Inter_blk_mvx <= mvx_CurrMb3[23:16];Inter_blk_mvy <= mvy_CurrMb3[23:16]; end
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0:begin Inter_blk_mvx <= mvx_CurrMb3[31:24];Inter_blk_mvy <= mvy_CurrMb3[31:24]; end
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endcase
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else //chroma 4x4 prediction
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begin Inter_blk_mvx <= mvx_CurrMb3[7:0]; Inter_blk_mvy <= mvy_CurrMb3[7:0]; end
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endcase
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end
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else
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begin Inter_blk_mvx <= 0; Inter_blk_mvy <= 0; end
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//----------------------------------------------------------------------------------------
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//Describes the offset of each blk4x4 inside a MB
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//----------------------------------------------------------------------------------------
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// xOffset = 0 for 0,2,8, 10 yOffset = 0 for 0, 1, 4, 5
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// xOffset = 4 for 1,3,9, 11 yOffset = 4 for 2, 3, 6, 7
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// xOffset = 8 for 4,6,12,14 yOffset = 8 for 8, 9, 12,13
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// xOffset = 12 for 5,7,13,15 yOffset = 12 for 10,11,14,15
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reg [3:0] xOffsetL,yOffsetL;
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always @ (IsInterLuma or mv_below8x8_curr or blk4x4_rec_counter[2] or blk4x4_rec_counter[0])
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|
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if (IsInterLuma)
|
| 236 |
|
|
begin
|
| 237 |
|
|
if (!mv_below8x8_curr)
|
| 238 |
|
|
xOffsetL <= (blk4x4_rec_counter[2])? 4'd8:4'd0;
|
| 239 |
|
|
else
|
| 240 |
|
|
case ({blk4x4_rec_counter[2],blk4x4_rec_counter[0]})
|
| 241 |
|
|
2'b00:xOffsetL <= 4'd0;
|
| 242 |
|
|
2'b01:xOffsetL <= 4'd4;
|
| 243 |
|
|
2'b10:xOffsetL <= 4'd8;
|
| 244 |
|
|
2'b11:xOffsetL <= 4'd12;
|
| 245 |
|
|
endcase
|
| 246 |
|
|
end
|
| 247 |
|
|
else
|
| 248 |
|
|
xOffsetL <= 0;
|
| 249 |
|
|
|
| 250 |
|
|
always @ (IsInterLuma or mv_below8x8_curr or blk4x4_rec_counter[3] or blk4x4_rec_counter[1])
|
| 251 |
|
|
if (IsInterLuma)
|
| 252 |
|
|
begin
|
| 253 |
|
|
if (!mv_below8x8_curr)
|
| 254 |
|
|
yOffsetL <= (blk4x4_rec_counter[3])? 4'd8:4'd0;
|
| 255 |
|
|
else
|
| 256 |
|
|
case ({blk4x4_rec_counter[3],blk4x4_rec_counter[1]})
|
| 257 |
|
|
2'b00:yOffsetL <= 4'd0;
|
| 258 |
|
|
2'b01:yOffsetL <= 4'd4;
|
| 259 |
|
|
2'b10:yOffsetL <= 4'd8;
|
| 260 |
|
|
2'b11:yOffsetL <= 4'd12;
|
| 261 |
|
|
endcase
|
| 262 |
|
|
end
|
| 263 |
|
|
else
|
| 264 |
|
|
yOffsetL <= 0;
|
| 265 |
|
|
|
| 266 |
|
|
reg [2:0] xOffsetC,yOffsetC;
|
| 267 |
|
|
always @ (IsInterChroma or mv_below8x8_curr or blk4x4_rec_counter[0] or Inter_chroma2x2_counter[0])
|
| 268 |
|
|
if (IsInterChroma)
|
| 269 |
|
|
begin
|
| 270 |
|
|
if (mv_below8x8_curr == 1'b0)
|
| 271 |
|
|
xOffsetC <= (blk4x4_rec_counter[0] == 1'b0)? 3'd0:3'd4;
|
| 272 |
|
|
else
|
| 273 |
|
|
case (blk4x4_rec_counter[0])
|
| 274 |
|
|
1'b0:xOffsetC <= (Inter_chroma2x2_counter[0] == 1'b1)? 3'd0:3'd2;
|
| 275 |
|
|
1'b1:xOffsetC <= (Inter_chroma2x2_counter[0] == 1'b1)? 3'd4:3'd6;
|
| 276 |
|
|
endcase
|
| 277 |
|
|
end
|
| 278 |
|
|
else
|
| 279 |
|
|
xOffsetC <= 0;
|
| 280 |
|
|
|
| 281 |
|
|
always @ (IsInterChroma or mv_below8x8_curr or blk4x4_rec_counter[1] or Inter_chroma2x2_counter[1])
|
| 282 |
|
|
if (IsInterChroma)
|
| 283 |
|
|
begin
|
| 284 |
|
|
if (mv_below8x8_curr == 1'b0)
|
| 285 |
|
|
yOffsetC <= (blk4x4_rec_counter[1] == 1'b0)? 3'd0:3'd4;
|
| 286 |
|
|
else
|
| 287 |
|
|
case (blk4x4_rec_counter[1])
|
| 288 |
|
|
1'b0:yOffsetC <= (Inter_chroma2x2_counter[1] == 1'b1)? 3'd0:3'd2;
|
| 289 |
|
|
1'b1:yOffsetC <= (Inter_chroma2x2_counter[1] == 1'b1)? 3'd4:3'd6;
|
| 290 |
|
|
endcase
|
| 291 |
|
|
end
|
| 292 |
|
|
else
|
| 293 |
|
|
yOffsetC <= 3'd0;
|
| 294 |
|
|
//----------------------------------------------------------------------------------------
|
| 295 |
|
|
//Integer position of each left-up-most pixel of a 8x8/4x4/2x2 blk
|
| 296 |
|
|
//----------------------------------------------------------------------------------------
|
| 297 |
|
|
wire [8:0] xIntL_unclip,yIntL_unclip; // 2's complement,bit[8] is the sign bit
|
| 298 |
|
|
wire [7:0] xIntC_unclip,yIntC_unclip; // 2's complement,bit[7] is the sign bit
|
| 299 |
|
|
assign xIntL_unclip = (IsInterLuma)? ({1'b0,mb_num_h,4'b0} + xOffsetL + {{3{Inter_blk_mvx[7]}},Inter_blk_mvx[7:2]}):0;
|
| 300 |
|
|
assign yIntL_unclip = (IsInterLuma)? ({1'b0,mb_num_v,4'b0} + yOffsetL + {{3{Inter_blk_mvy[7]}},Inter_blk_mvy[7:2]}):0;
|
| 301 |
|
|
assign xIntC_unclip = (IsInterChroma)? ({1'b0,mb_num_h,3'b0} + xOffsetC + {{3{Inter_blk_mvx[7]}},Inter_blk_mvx[7:3]}):0;
|
| 302 |
|
|
assign yIntC_unclip = (IsInterChroma)? ({1'b0,mb_num_v,3'b0} + yOffsetC + {{3{Inter_blk_mvy[7]}},Inter_blk_mvy[7:3]}):0;
|
| 303 |
|
|
|
| 304 |
|
|
wire [8:0] xInt_org_unclip;
|
| 305 |
|
|
wire [8:0] yInt_org_unclip;
|
| 306 |
|
|
assign xInt_org_unclip = (IsInterLuma)? xIntL_unclip:{xIntC_unclip[7],xIntC_unclip};
|
| 307 |
|
|
assign yInt_org_unclip = (IsInterLuma)? yIntL_unclip:{yIntC_unclip[7],yIntC_unclip};
|
| 308 |
|
|
assign xInt_org_unclip_1to0 = xInt_org_unclip[1:0];
|
| 309 |
|
|
//----------------------------------------------------------------------------------------
|
| 310 |
|
|
//Fractional motion vector for both luma and chroma
|
| 311 |
|
|
//----------------------------------------------------------------------------------------
|
| 312 |
|
|
wire [3:0] pos_FracL;
|
| 313 |
|
|
wire Is_InterChromaCopy;//If chroma is predicted by direct copy,calculate cycle would reduce
|
| 314 |
|
|
//from 16 cycles to 4 cycles
|
| 315 |
|
|
|
| 316 |
|
|
assign xFracL = (IsInterLuma)? Inter_blk_mvx[1:0]:0;
|
| 317 |
|
|
assign yFracL = (IsInterLuma)? Inter_blk_mvy[1:0]:0;
|
| 318 |
|
|
assign xFracC = (IsInterChroma)? Inter_blk_mvx[2:0]:0;
|
| 319 |
|
|
assign yFracC = (IsInterChroma)? Inter_blk_mvy[2:0]:0;
|
| 320 |
|
|
assign pos_FracL = {xFracL,yFracL};
|
| 321 |
|
|
assign Is_InterChromaCopy = (IsInterChroma && xFracC == 0 && yFracC == 0)? 1'b1:1'b0;
|
| 322 |
|
|
|
| 323 |
|
|
//----------------------------------------------------------------------------------------
|
| 324 |
|
|
//Inter prediction step control counter
|
| 325 |
|
|
//----------------------------------------------------------------------------------------
|
| 326 |
|
|
//1.Preload integer pels counter
|
| 327 |
|
|
// If block partition equals 8x8 or above,preload only at first 4x4 block of each 8x8block
|
| 328 |
|
|
// If block partition is 8x4,4x8 or 4x4, preload at each 4x4 block
|
| 329 |
|
|
always @ (posedge clk)
|
| 330 |
|
|
if (reset_n == 1'b0)
|
| 331 |
|
|
blk4x4_inter_preload_counter <= 0;
|
| 332 |
|
|
//luma
|
| 333 |
|
|
else if (trigger_blk4x4_inter_pred && IsInterLuma)
|
| 334 |
|
|
begin
|
| 335 |
|
|
if (!mv_below8x8_curr && blk4x4_rec_counter[1:0] == 2'b00)
|
| 336 |
|
|
case (pos_FracL)
|
| 337 |
|
|
`pos_Int :blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b00)? 6'd17:6'd25;
|
| 338 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:blk4x4_inter_preload_counter <= 6'd53;
|
| 339 |
|
|
`pos_d,`pos_h,`pos_n :blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b00)? 6'd27:6'd40;
|
| 340 |
|
|
`pos_a,`pos_b,`pos_c :blk4x4_inter_preload_counter <= 6'd33;
|
| 341 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r :blk4x4_inter_preload_counter <= 6'd49;
|
| 342 |
|
|
endcase
|
| 343 |
|
|
else if (mv_below8x8_curr) //partition below 8x8block
|
| 344 |
|
|
case (pos_FracL)
|
| 345 |
|
|
`pos_Int :blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b00)? 6'd5:6'd9;
|
| 346 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:blk4x4_inter_preload_counter <= 6'd28;
|
| 347 |
|
|
`pos_d,`pos_h,`pos_n :blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b00)? 6'd10:6'd19;
|
| 348 |
|
|
`pos_a,`pos_b,`pos_c :blk4x4_inter_preload_counter <= 6'd13;
|
| 349 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r :blk4x4_inter_preload_counter <= 6'd24;
|
| 350 |
|
|
endcase
|
| 351 |
|
|
end
|
| 352 |
|
|
//chroma
|
| 353 |
|
|
else if (trigger_blk4x4_inter_pred && IsInterChroma && mv_below8x8_curr == 1'b0)
|
| 354 |
|
|
begin
|
| 355 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 356 |
|
|
blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b00)? 6'd5:6'd9;
|
| 357 |
|
|
else
|
| 358 |
|
|
blk4x4_inter_preload_counter <= 6'd11;
|
| 359 |
|
|
end
|
| 360 |
|
|
else if (trigger_blk2x2_inter_pred && IsInterChroma && mv_below8x8_curr == 1'b1)
|
| 361 |
|
|
begin
|
| 362 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 363 |
|
|
blk4x4_inter_preload_counter <= (xInt_org_unclip[1:0] == 2'b11)? 6'd5:6'd3;
|
| 364 |
|
|
else
|
| 365 |
|
|
blk4x4_inter_preload_counter <= (xInt_org_unclip[1] == 1'b0 )? 6'd4:6'd7;
|
| 366 |
|
|
end
|
| 367 |
|
|
else if (blk4x4_inter_preload_counter != 0)
|
| 368 |
|
|
blk4x4_inter_preload_counter <= blk4x4_inter_preload_counter - 1;
|
| 369 |
|
|
|
| 370 |
|
|
//2.Calculate counter
|
| 371 |
|
|
always @ (posedge clk)
|
| 372 |
|
|
if (reset_n == 1'b0)
|
| 373 |
|
|
blk4x4_inter_calculate_counter <= 0;
|
| 374 |
|
|
//luma
|
| 375 |
|
|
else if (IsInterLuma && ((!mv_below8x8_curr && (
|
| 376 |
|
|
(blk4x4_rec_counter[1:0] == 2'b00 && blk4x4_inter_preload_counter == 1) ||
|
| 377 |
|
|
(blk4x4_rec_counter[1:0] != 2'b00 && trigger_blk4x4_inter_pred))) ||
|
| 378 |
|
|
(mv_below8x8_curr && blk4x4_inter_preload_counter == 1)))
|
| 379 |
|
|
case (pos_FracL)
|
| 380 |
|
|
`pos_j,`pos_f,`pos_q:blk4x4_inter_calculate_counter <= 4'd5;
|
| 381 |
|
|
`pos_i,`pos_k :blk4x4_inter_calculate_counter <= 4'd8;
|
| 382 |
|
|
default :blk4x4_inter_calculate_counter <= 4'd4;
|
| 383 |
|
|
endcase
|
| 384 |
|
|
//chroma
|
| 385 |
|
|
else if (blk4x4_inter_preload_counter == 1 && IsInterChroma == 1'b1)
|
| 386 |
|
|
case (mv_below8x8_curr)
|
| 387 |
|
|
1'b0:blk4x4_inter_calculate_counter <= 4'd4;
|
| 388 |
|
|
1'b1:blk4x4_inter_calculate_counter <= 4'd1;
|
| 389 |
|
|
endcase
|
| 390 |
|
|
else if (blk4x4_inter_calculate_counter != 0)
|
| 391 |
|
|
blk4x4_inter_calculate_counter <= blk4x4_inter_calculate_counter - 1;
|
| 392 |
|
|
|
| 393 |
|
|
assign end_of_one_blk4x4_inter = (blk4x4_inter_calculate_counter == 4'd1 &&
|
| 394 |
|
|
((IsInterChroma && mv_below8x8_curr && Inter_chroma2x2_counter == 2'b00) ||
|
| 395 |
|
|
!(IsInterChroma && mv_below8x8_curr)));
|
| 396 |
|
|
//----------------------------------------------------------------------------------------
|
| 397 |
|
|
//Inter prediction reference frame RAM read control
|
| 398 |
|
|
//----------------------------------------------------------------------------------------
|
| 399 |
|
|
assign ref_frame_RAM_rd = ((IsInterLuma || IsInterChroma) && blk4x4_inter_preload_counter != 6'd0 && blk4x4_inter_preload_counter != 6'd1);
|
| 400 |
|
|
|
| 401 |
|
|
//compared with blk4x4_inter_preload_counter,blk4x4_inter_preload_counter_m2 has some advantages
|
| 402 |
|
|
//during some pos_FracL for vertical memory address decoding
|
| 403 |
|
|
wire [5:0] blk4x4_inter_preload_counter_m2;
|
| 404 |
|
|
assign blk4x4_inter_preload_counter_m2 = (blk4x4_inter_preload_counter == 6'd0 || blk4x4_inter_preload_counter == 6'd1)?
|
| 405 |
|
|
6'd0:(blk4x4_inter_preload_counter - 2);
|
| 406 |
|
|
|
| 407 |
|
|
//xInt_curr_offset: offset from the left-upper most pixel of current block,ranging -2 ~ +10.
|
| 408 |
|
|
//After each preload cycle,xInt_curr_offset will increase 4
|
| 409 |
|
|
reg [4:0] xInt_curr_offset;
|
| 410 |
|
|
always @ (IsInterLuma or mv_below8x8_curr or pos_FracL or xFracC or yFracC
|
| 411 |
|
|
or xInt_org_unclip[1:0] or blk4x4_inter_preload_counter_m2 or blk4x4_inter_preload_counter)
|
| 412 |
|
|
if (blk4x4_inter_preload_counter != 6'd0 && blk4x4_inter_preload_counter != 6'd1)
|
| 413 |
|
|
begin
|
| 414 |
|
|
if (IsInterLuma)
|
| 415 |
|
|
begin
|
| 416 |
|
|
if (!mv_below8x8_curr)
|
| 417 |
|
|
case (pos_FracL)
|
| 418 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:
|
| 419 |
|
|
case (blk4x4_inter_preload_counter_m2[1:0])
|
| 420 |
|
|
2'b00:xInt_curr_offset <= 5'b01010; //+10
|
| 421 |
|
|
2'b01:xInt_curr_offset <= 5'b00110; //+6
|
| 422 |
|
|
2'b10:xInt_curr_offset <= 5'b00010; //+2
|
| 423 |
|
|
2'b11:xInt_curr_offset <= 5'b11110; //-2
|
| 424 |
|
|
endcase
|
| 425 |
|
|
`pos_d,`pos_h,`pos_n:
|
| 426 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 427 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0])? 4'b0:4'b0100; //+0 or +4
|
| 428 |
|
|
else
|
| 429 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 430 |
|
|
6'd38,6'd35,6'd32,6'd29,6'd26,6'd23,6'd20,6'd17,6'd14,6'd11,6'd8,6'd5,6'd2:
|
| 431 |
|
|
xInt_curr_offset <= 5'b0; //+0
|
| 432 |
|
|
6'd37,6'd34,6'd31,6'd28,6'd25,6'd22,6'd19,6'd16,6'd13,6'd10,6'd7,6'd4,6'd1:
|
| 433 |
|
|
xInt_curr_offset <= 5'b00100; //+4
|
| 434 |
|
|
default:xInt_curr_offset <= 5'b01000;//+8
|
| 435 |
|
|
endcase
|
| 436 |
|
|
`pos_a,`pos_b,`pos_c:
|
| 437 |
|
|
case (blk4x4_inter_preload_counter_m2[1:0])
|
| 438 |
|
|
2'b00:xInt_curr_offset <= 5'b01010; //+10
|
| 439 |
|
|
2'b01:xInt_curr_offset <= 5'b00110; //+6
|
| 440 |
|
|
2'b10:xInt_curr_offset <= 5'b00010; //+2
|
| 441 |
|
|
2'b11:xInt_curr_offset <= 5'b11110; //-2
|
| 442 |
|
|
endcase
|
| 443 |
|
|
`pos_Int:
|
| 444 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 445 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0])? 5'b0:5'b0100; //+0 or +4
|
| 446 |
|
|
else
|
| 447 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 448 |
|
|
6'd23,6'd20,6'd17,6'd14,6'd11,6'd8,6'd5,6'd2:
|
| 449 |
|
|
xInt_curr_offset <= 5'b00000; //+0
|
| 450 |
|
|
6'd22,6'd19,6'd16,6'd13,6'd10,6'd7,6'd4,6'd1:
|
| 451 |
|
|
xInt_curr_offset <= 5'b00100; //+4
|
| 452 |
|
|
default:xInt_curr_offset <= 5'b01000;//+8
|
| 453 |
|
|
endcase
|
| 454 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r:
|
| 455 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 456 |
|
|
6'd47,6'd44,6'd5,6'd2:
|
| 457 |
|
|
xInt_curr_offset <= 5'b00000; //+0
|
| 458 |
|
|
6'd46,6'd43,6'd4,6'd1:
|
| 459 |
|
|
xInt_curr_offset <= 5'b00100; //+4
|
| 460 |
|
|
6'd45,6'd42,6'd3,6'd0:
|
| 461 |
|
|
xInt_curr_offset <= 5'b01000; //+8
|
| 462 |
|
|
default:
|
| 463 |
|
|
case (blk4x4_inter_preload_counter_m2[1:0])
|
| 464 |
|
|
2'b00:xInt_curr_offset <= 5'b00010; //+2
|
| 465 |
|
|
2'b01:xInt_curr_offset <= 5'b11110; //-2
|
| 466 |
|
|
2'b10:xInt_curr_offset <= 5'b01010; //+10
|
| 467 |
|
|
2'b11:xInt_curr_offset <= 5'b00110; //+6
|
| 468 |
|
|
endcase
|
| 469 |
|
|
endcase
|
| 470 |
|
|
endcase
|
| 471 |
|
|
else //block partition below 8x8
|
| 472 |
|
|
case (pos_FracL)
|
| 473 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:
|
| 474 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 475 |
|
|
6'd26,6'd23,6'd20,6'd17,6'd14,6'd11,6'd8,6'd5,6'd2:xInt_curr_offset <= 5'b11110;//-2
|
| 476 |
|
|
6'd25,6'd22,6'd19,6'd16,6'd13,6'd10,6'd7,6'd4,6'd1:xInt_curr_offset <= 5'b00010;//+2
|
| 477 |
|
|
default:xInt_curr_offset <= 5'b00110; //+6
|
| 478 |
|
|
endcase
|
| 479 |
|
|
`pos_d,`pos_h,`pos_n:
|
| 480 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 481 |
|
|
xInt_curr_offset <= 5'b0; //+0
|
| 482 |
|
|
else
|
| 483 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0])? 5'b0:5'b00100;//+0 or +4
|
| 484 |
|
|
`pos_a,`pos_b,`pos_c:
|
| 485 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 486 |
|
|
6'd11,6'd8,6'd5,6'd2:xInt_curr_offset <= 5'b11110; //-2
|
| 487 |
|
|
6'd10,6'd7,6'd4,6'd1:xInt_curr_offset <= 5'b00010; //+2
|
| 488 |
|
|
default:xInt_curr_offset <= 5'b00110; //+6
|
| 489 |
|
|
endcase
|
| 490 |
|
|
`pos_Int:
|
| 491 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 492 |
|
|
xInt_curr_offset <= 5'b0; //+0
|
| 493 |
|
|
else
|
| 494 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0])? 5'b0:5'b00100; //+0 or +4
|
| 495 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r:
|
| 496 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 497 |
|
|
6'd22,6'd20,6'd3,6'd1:xInt_curr_offset <= 5'b0; //+0
|
| 498 |
|
|
6'd21,6'd19,6'd2,6'd0:xInt_curr_offset <= 5'b00100; //+4
|
| 499 |
|
|
6'd18,6'd15,6'd12,6'd9,6'd6:xInt_curr_offset <= 5'b11110;//-2
|
| 500 |
|
|
6'd17,6'd14,6'd11,6'd8,6'd5:xInt_curr_offset <= 5'b00010;//+2
|
| 501 |
|
|
6'd16,6'd13,6'd10,6'd7,6'd4:xInt_curr_offset <= 5'b00110;//+6
|
| 502 |
|
|
default:xInt_curr_offset <= 5'b0;
|
| 503 |
|
|
endcase
|
| 504 |
|
|
endcase
|
| 505 |
|
|
end
|
| 506 |
|
|
else //IsInterChroma
|
| 507 |
|
|
begin
|
| 508 |
|
|
if (!mv_below8x8_curr)
|
| 509 |
|
|
begin
|
| 510 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 511 |
|
|
begin
|
| 512 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 513 |
|
|
xInt_curr_offset <= 5'b0;
|
| 514 |
|
|
else
|
| 515 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0] == 1'b1)? 5'b0:5'b0100;
|
| 516 |
|
|
end
|
| 517 |
|
|
else
|
| 518 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0] == 1'b1)? 5'b0:5'b0100;
|
| 519 |
|
|
end
|
| 520 |
|
|
else //mv_below8x8_curr == 1'b1
|
| 521 |
|
|
begin
|
| 522 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 523 |
|
|
begin
|
| 524 |
|
|
if (xInt_org_unclip[1:0] == 2'b11) // 4 preload cycles
|
| 525 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0] == 1'b1)? 5'b0:5'b0100;
|
| 526 |
|
|
else
|
| 527 |
|
|
xInt_curr_offset <= 0;
|
| 528 |
|
|
end
|
| 529 |
|
|
else
|
| 530 |
|
|
begin
|
| 531 |
|
|
if (xInt_org_unclip[1] == 1'b0)
|
| 532 |
|
|
xInt_curr_offset <= 0;
|
| 533 |
|
|
else
|
| 534 |
|
|
xInt_curr_offset <= (blk4x4_inter_preload_counter_m2[0] == 1'b1)? 5'b0:5'b0100;
|
| 535 |
|
|
end
|
| 536 |
|
|
end
|
| 537 |
|
|
end
|
| 538 |
|
|
end
|
| 539 |
|
|
else //blk4x4_inter_preload_counter == 0 || blk4x4_inter_preload_counter == 1
|
| 540 |
|
|
xInt_curr_offset <= 5'b0;
|
| 541 |
|
|
|
| 542 |
|
|
//Derive unclipped x pos for each preload cycle
|
| 543 |
|
|
wire [8:0] xInt_addr_unclip;
|
| 544 |
|
|
assign xInt_addr_unclip = xInt_org_unclip + {{4{xInt_curr_offset[4]}},xInt_curr_offset};
|
| 545 |
|
|
|
| 546 |
|
|
//x addr clipped:x address in pixels
|
| 547 |
|
|
reg [7:0] xInt_addr;
|
| 548 |
|
|
always @ (xInt_addr_unclip or IsInterLuma or IsInterChroma)
|
| 549 |
|
|
if (xInt_addr_unclip[8] == 1'b1) //negative
|
| 550 |
|
|
xInt_addr <= 0;
|
| 551 |
|
|
else if (IsInterLuma)
|
| 552 |
|
|
xInt_addr <= (xInt_addr_unclip[7:0] > (`pic_width - 4))? 8'd172:xInt_addr_unclip[7:0];
|
| 553 |
|
|
else if (IsInterChroma)
|
| 554 |
|
|
xInt_addr <= (xInt_addr_unclip[7:0] > (`half_pic_width - 4))? 8'd84:xInt_addr_unclip[7:0];
|
| 555 |
|
|
else
|
| 556 |
|
|
xInt_addr <= 0;
|
| 557 |
|
|
|
| 558 |
|
|
//yInt_p1:when loading from Xth line to (X-1)th line,yInt_p1 is set to 1'b1 at the last
|
| 559 |
|
|
//loading cycle of current Xth line
|
| 560 |
|
|
reg yInt_p1;
|
| 561 |
|
|
always @ (IsInterLuma or mv_below8x8_curr or pos_FracL or xFracC or yFracC
|
| 562 |
|
|
or blk4x4_inter_preload_counter or blk4x4_inter_preload_counter_m2 or xInt_org_unclip[1:0] or xInt_org_unclip[1])
|
| 563 |
|
|
if (blk4x4_inter_preload_counter != 6'd0 && blk4x4_inter_preload_counter != 6'd1)
|
| 564 |
|
|
begin
|
| 565 |
|
|
if (IsInterLuma)
|
| 566 |
|
|
case (mv_below8x8_curr)
|
| 567 |
|
|
1'b0:
|
| 568 |
|
|
case (pos_FracL)
|
| 569 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:
|
| 570 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[1:0] == 2'b00)? 1'b1:1'b0;
|
| 571 |
|
|
`pos_d,`pos_h,`pos_n:
|
| 572 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 573 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 574 |
|
|
else
|
| 575 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 576 |
|
|
6'd36,6'd33,6'd30,6'd27,6'd24,6'd21,6'd18,6'd15,6'd12,6'd9,6'd6,6'd3,6'd0:
|
| 577 |
|
|
yInt_p1 <= 1'b1;
|
| 578 |
|
|
default:yInt_p1 <= 1'b0;
|
| 579 |
|
|
endcase
|
| 580 |
|
|
`pos_a,`pos_b,`pos_c:
|
| 581 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[1:0] == 2'b00)? 1'b1:1'b0;
|
| 582 |
|
|
`pos_Int:
|
| 583 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 584 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 585 |
|
|
else
|
| 586 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 587 |
|
|
6'd21,6'd18,6'd15,6'd12,6'd9,6'd6,6'd3,6'd0:yInt_p1 <= 1'b1;
|
| 588 |
|
|
default: yInt_p1 <= 1'b0;
|
| 589 |
|
|
endcase
|
| 590 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r:
|
| 591 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 592 |
|
|
6'd45,6'd42,6'd3,6'd0:yInt_p1 <= 1'b1;
|
| 593 |
|
|
6'd6,6'd10,6'd14,6'd18,6'd22,6'd26,6'd30,6'd34,6'd38:yInt_p1 <= 1'b1;
|
| 594 |
|
|
default:yInt_p1 <= 1'b0;
|
| 595 |
|
|
endcase
|
| 596 |
|
|
endcase
|
| 597 |
|
|
1'b1: //block partition below 8x8
|
| 598 |
|
|
case (pos_FracL)
|
| 599 |
|
|
`pos_f,`pos_q,`pos_i,`pos_k,`pos_j:
|
| 600 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 601 |
|
|
6'd24,6'd21,6'd18,6'd15,6'd12,6'd9,6'd6,6'd3,6'd0:yInt_p1 <= 1'b1;
|
| 602 |
|
|
default:yInt_p1 <= 1'b0;
|
| 603 |
|
|
endcase
|
| 604 |
|
|
`pos_d,`pos_h,`pos_n:
|
| 605 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 606 |
|
|
yInt_p1 <= 1'b1;
|
| 607 |
|
|
else
|
| 608 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 609 |
|
|
`pos_a,`pos_b,`pos_c:
|
| 610 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 611 |
|
|
5'd9,5'd6,5'd3,5'd0 :yInt_p1 <= 1'b1;
|
| 612 |
|
|
default :yInt_p1 <= 1'b0;
|
| 613 |
|
|
endcase
|
| 614 |
|
|
`pos_Int:
|
| 615 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 616 |
|
|
yInt_p1 <= 1'b1;
|
| 617 |
|
|
else
|
| 618 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 619 |
|
|
`pos_e,`pos_g,`pos_p,`pos_r:
|
| 620 |
|
|
case (blk4x4_inter_preload_counter_m2)
|
| 621 |
|
|
6'd21,6'd19,6'd2,6'd0 :yInt_p1 <= 1'b1;
|
| 622 |
|
|
6'd4,6'd7,6'd10,6'd13,6'd16 :yInt_p1 <= 1'b1;
|
| 623 |
|
|
default :yInt_p1 <= 1'b0;
|
| 624 |
|
|
endcase
|
| 625 |
|
|
endcase
|
| 626 |
|
|
endcase
|
| 627 |
|
|
else //IsInterChroma
|
| 628 |
|
|
case (mv_below8x8_curr)
|
| 629 |
|
|
1'b0:
|
| 630 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 631 |
|
|
begin
|
| 632 |
|
|
if (xInt_org_unclip[1:0] == 2'b00)
|
| 633 |
|
|
yInt_p1 <= 1'b1;
|
| 634 |
|
|
else
|
| 635 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 636 |
|
|
end
|
| 637 |
|
|
else
|
| 638 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 639 |
|
|
1'b1:
|
| 640 |
|
|
if (xFracC == 0 && yFracC == 0)
|
| 641 |
|
|
begin
|
| 642 |
|
|
if (xInt_org_unclip[1:0] != 2'b11)
|
| 643 |
|
|
yInt_p1 <= 1'b1;
|
| 644 |
|
|
else
|
| 645 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 646 |
|
|
end
|
| 647 |
|
|
else
|
| 648 |
|
|
begin
|
| 649 |
|
|
if (xInt_org_unclip[1] == 1'b0)
|
| 650 |
|
|
yInt_p1 <= 1'b1;
|
| 651 |
|
|
else
|
| 652 |
|
|
yInt_p1 <= (blk4x4_inter_preload_counter_m2[0] == 1'b0)? 1'b1:1'b0;
|
| 653 |
|
|
end
|
| 654 |
|
|
endcase
|
| 655 |
|
|
end
|
| 656 |
|
|
else // blk4x4_inter_preload_counter == 0 || blk4x4_inter_preload_counter == 1
|
| 657 |
|
|
yInt_p1 <= 1'b0;
|
| 658 |
|
|
|
| 659 |
|
|
//Derive unclipped y pos for each preload cycle
|
| 660 |
|
|
reg [8:0] yInt_addr_unclip;
|
| 661 |
|
|
always @ (posedge clk)
|
| 662 |
|
|
if (reset_n == 1'b0)
|
| 663 |
|
|
yInt_addr_unclip <= 0;
|
| 664 |
|
|
else if ((IsInterLuma && (trigger_blk4x4_inter_pred && (mv_below8x8_curr ||
|
| 665 |
|
|
(!mv_below8x8_curr && blk4x4_rec_counter[1:0] == 2'b00)))) ||
|
| 666 |
|
|
(IsInterChroma && (!mv_below8x8_curr && trigger_blk4x4_inter_pred) ||
|
| 667 |
|
|
(mv_below8x8_curr && trigger_blk2x2_inter_pred)))
|
| 668 |
|
|
begin
|
| 669 |
|
|
if (IsInterLuma) //Luma
|
| 670 |
|
|
case (pos_FracL)
|
| 671 |
|
|
`pos_a,`pos_b,`pos_c,`pos_Int:
|
| 672 |
|
|
yInt_addr_unclip <= yInt_org_unclip;
|
| 673 |
|
|
default: //need -2 here
|
| 674 |
|
|
yInt_addr_unclip <= yInt_org_unclip + 9'b111111110;
|
| 675 |
|
|
endcase
|
| 676 |
|
|
else //Chroma
|
| 677 |
|
|
yInt_addr_unclip <= yInt_org_unclip;
|
| 678 |
|
|
end
|
| 679 |
|
|
else if (blk4x4_inter_preload_counter_m2 != 0 && yInt_p1 == 1'b1)
|
| 680 |
|
|
yInt_addr_unclip <= yInt_addr_unclip + 1;
|
| 681 |
|
|
|
| 682 |
|
|
//y addr clipped
|
| 683 |
|
|
reg [7:0] yInt_addr;
|
| 684 |
|
|
always @ (yInt_addr_unclip or IsInterLuma or IsInterChroma)
|
| 685 |
|
|
if (yInt_addr_unclip[8] == 1'b1) //negative
|
| 686 |
|
|
yInt_addr <= 0;
|
| 687 |
|
|
else if (IsInterLuma)
|
| 688 |
|
|
yInt_addr <= (yInt_addr_unclip[7:0] > (`pic_height - 1))? 8'd143:yInt_addr_unclip[7:0];
|
| 689 |
|
|
else if (IsInterChroma)
|
| 690 |
|
|
yInt_addr <= (yInt_addr_unclip[7:0] > (`half_pic_height - 1))? 8'd71:yInt_addr_unclip[7:0];
|
| 691 |
|
|
else
|
| 692 |
|
|
yInt_addr <= 0;
|
| 693 |
|
|
|
| 694 |
|
|
wire [12:0] offset_constant;
|
| 695 |
|
|
wire [10:0] yInt_addr_x11;
|
| 696 |
|
|
wire [12:0] offset_yInt_addr;
|
| 697 |
|
|
assign offset_constant = (IsInterLuma)? 0:((IsInterChroma)? ((blk4x4_rec_counter < 5'd20)? 13'd6336:13'd7920):0);
|
| 698 |
|
|
assign yInt_addr_x11 = {yInt_addr,3'b0} + {2'b0,yInt_addr,1'b0} + {3'b0,yInt_addr};
|
| 699 |
|
|
assign offset_yInt_addr = (IsInterLuma)? {yInt_addr_x11,2'b0}:{1'b0,yInt_addr_x11,1'b0};
|
| 700 |
|
|
assign ref_frame_RAM_rd_addr = (offset_constant + {8'b0,xInt_addr[7:2]}) + {1'b0,offset_yInt_addr};
|
| 701 |
|
|
|
| 702 |
|
|
//----------------------------------------------------------------------------------------
|
| 703 |
|
|
//Inter prediction output control: from LPE or from CPE
|
| 704 |
|
|
//----------------------------------------------------------------------------------------
|
| 705 |
|
|
always @ (IsInterLuma or IsInterChroma or Is_InterChromaCopy
|
| 706 |
|
|
or blk4x4_inter_calculate_counter or pos_FracL
|
| 707 |
|
|
or Inter_pix_copy0 or Inter_pix_copy1 or Inter_pix_copy2 or Inter_pix_copy3
|
| 708 |
|
|
or LPE0_out or LPE1_out or LPE2_out or LPE3_out
|
| 709 |
|
|
or CPE0_out or CPE1_out or CPE2_out or CPE3_out)
|
| 710 |
|
|
if (IsInterLuma && blk4x4_inter_calculate_counter != 0)
|
| 711 |
|
|
begin
|
| 712 |
|
|
Inter_blk4x4_pred_output_valid <= 2'b01;
|
| 713 |
|
|
case (pos_FracL)
|
| 714 |
|
|
`pos_Int:
|
| 715 |
|
|
begin
|
| 716 |
|
|
Inter_pred_out0 <= Inter_pix_copy0;Inter_pred_out1 <= Inter_pix_copy1;
|
| 717 |
|
|
Inter_pred_out2 <= Inter_pix_copy2;Inter_pred_out3 <= Inter_pix_copy3;
|
| 718 |
|
|
end
|
| 719 |
|
|
`pos_i,`pos_k:
|
| 720 |
|
|
if (blk4x4_inter_calculate_counter == 4'd7 || blk4x4_inter_calculate_counter == 4'd5 ||
|
| 721 |
|
|
blk4x4_inter_calculate_counter == 4'd3 || blk4x4_inter_calculate_counter == 4'd1)
|
| 722 |
|
|
begin
|
| 723 |
|
|
Inter_pred_out0 <= LPE0_out;Inter_pred_out1 <= LPE1_out;
|
| 724 |
|
|
Inter_pred_out2 <= LPE2_out;Inter_pred_out3 <= LPE3_out;
|
| 725 |
|
|
end
|
| 726 |
|
|
else
|
| 727 |
|
|
begin
|
| 728 |
|
|
Inter_pred_out0 <= 0;Inter_pred_out1 <= 0;Inter_pred_out2 <= 0;Inter_pred_out3 <= 0;
|
| 729 |
|
|
end
|
| 730 |
|
|
default:
|
| 731 |
|
|
if (blk4x4_inter_calculate_counter == 4'd4 || blk4x4_inter_calculate_counter == 4'd3 ||
|
| 732 |
|
|
blk4x4_inter_calculate_counter == 4'd2 || blk4x4_inter_calculate_counter == 4'd1)
|
| 733 |
|
|
begin
|
| 734 |
|
|
Inter_pred_out0 <= LPE0_out;Inter_pred_out1 <= LPE1_out;
|
| 735 |
|
|
Inter_pred_out2 <= LPE2_out;Inter_pred_out3 <= LPE3_out;
|
| 736 |
|
|
end
|
| 737 |
|
|
else
|
| 738 |
|
|
begin
|
| 739 |
|
|
Inter_pred_out0 <= 0;Inter_pred_out1 <= 0;Inter_pred_out2 <= 0;Inter_pred_out3 <= 0;
|
| 740 |
|
|
end
|
| 741 |
|
|
endcase
|
| 742 |
|
|
end
|
| 743 |
|
|
else if (IsInterChroma && blk4x4_inter_calculate_counter != 0)
|
| 744 |
|
|
begin
|
| 745 |
|
|
Inter_pred_out0 <= (Is_InterChromaCopy)? Inter_pix_copy0:CPE0_out;
|
| 746 |
|
|
Inter_pred_out1 <= (Is_InterChromaCopy)? Inter_pix_copy1:CPE1_out;
|
| 747 |
|
|
Inter_pred_out2 <= (Is_InterChromaCopy)? Inter_pix_copy2:CPE2_out;
|
| 748 |
|
|
Inter_pred_out3 <= (Is_InterChromaCopy)? Inter_pix_copy3:CPE3_out;
|
| 749 |
|
|
Inter_blk4x4_pred_output_valid <= 2'b10;
|
| 750 |
|
|
end
|
| 751 |
|
|
else
|
| 752 |
|
|
begin
|
| 753 |
|
|
Inter_pred_out0 <= 0;Inter_pred_out1 <= 0;Inter_pred_out2 <= 0;Inter_pred_out3 <= 0;
|
| 754 |
|
|
Inter_blk4x4_pred_output_valid <= 2'b00;
|
| 755 |
|
|
end
|
| 756 |
|
|
endmodule
|
| 757 |
|
|
|
| 758 |
|
|
|
| 759 |
|
|
|
| 760 |
|
|
|
| 761 |
|
|
|
| 762 |
|
|
|
| 763 |
|
|
|
| 764 |
|
|
|
| 765 |
|
|
|
| 766 |
|
|
|
| 767 |
|
|
|
| 768 |
|
|
|
| 769 |
|
|
|
| 770 |
|
|
|
| 771 |
|
|
|
| 772 |
|
|
|
| 773 |
|
|
|
| 774 |
|
|
|
| 775 |
|
|
|
| 776 |
|
|
|
| 777 |
|
|
|
| 778 |
|
|
|
| 779 |
|
|
|
| 780 |
|
|
|
| 781 |
|
|
|
| 782 |
|
|
|
