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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 : syntax_decoding.v
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// Generated : May 23, 2005
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// Copyright (C) 2008 Ke Xu
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//-------------------------------------------------------------------------------------------------
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// Description
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// Decoding each sytax inside the bitstream
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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 syntax_decoding (clk,reset_n,mb_num_h,mb_num_v,end_of_MB_DEC,pin_disable_DF,
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parser_state,nal_unit_state,seq_parameter_set_state,pic_parameter_set_state,
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slice_header_state,slice_data_state,mb_pred_state,sub_mb_pred_state,
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exp_golomb_decoding_output,BitStream_buffer_output,dependent_variable_decoding_output,mbPartIdx,
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nal_unit_type,start_code_prefix_found,
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deblocking_filter_control_present_flag,disable_deblocking_filter_idc,disable_DF,
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slice_alpha_c0_offset_div2,slice_beta_offset_div2,
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mb_skip_run,NumMbPart,NumSubMbPart,
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MBTypeGen_mbAddrA,MBTypeGen_mbAddrD,MBTypeGen_mbAddrB_reg,
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log2_max_frame_num_minus4,log2_max_pic_order_cnt_lsb_minus4,constrained_intra_pred_flag,
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num_ref_idx_active_override_flag,num_ref_idx_l0_active_minus1,
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slice_type,mb_type,mb_type_general,sub_mb_type,Intra16x16_predmode,intra_chroma_pred_mode,
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pic_init_qp_minus26,chroma_qp_index_offset,
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rem_intra4x4_pred_mode,prev_intra4x4_pred_mode_flag,mvd,mv_below8x8);
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input clk,reset_n;
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input [3:0] mb_num_h,mb_num_v;
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input end_of_MB_DEC;
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input pin_disable_DF;
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input [1:0] parser_state;
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input [2:0] nal_unit_state;
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input [3:0] seq_parameter_set_state;
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input [3:0] pic_parameter_set_state;
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input [3:0] slice_header_state;
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input [3:0] slice_data_state;
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input [2:0] mb_pred_state;
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input [1:0] sub_mb_pred_state;
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input [15:0] BitStream_buffer_output;
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input [7:0] exp_golomb_decoding_output;
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input [9:0] dependent_variable_decoding_output;
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input [1:0] mbPartIdx;
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output [4:0] nal_unit_type;
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output start_code_prefix_found;
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output deblocking_filter_control_present_flag;
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output [1:0] disable_deblocking_filter_idc;
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output disable_DF;
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output [3:0] slice_alpha_c0_offset_div2;
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output [3:0] slice_beta_offset_div2;
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output [6:0] mb_skip_run;
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output [2:0] NumMbPart;
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output [2:0] NumSubMbPart;
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output [1:0] MBTypeGen_mbAddrA;
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output MBTypeGen_mbAddrD;
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output [21:0] MBTypeGen_mbAddrB_reg;
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output [3:0] log2_max_frame_num_minus4;
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output [3:0] log2_max_pic_order_cnt_lsb_minus4;
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output constrained_intra_pred_flag;
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output num_ref_idx_active_override_flag;
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output [2:0] num_ref_idx_l0_active_minus1;
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output [2:0] slice_type;
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output [4:0] mb_type;
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output [3:0] mb_type_general;
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output [1:0] Intra16x16_predmode;
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output [1:0] intra_chroma_pred_mode;
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output [1:0] sub_mb_type;
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output [5:0] pic_init_qp_minus26;
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output [4:0] chroma_qp_index_offset;
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output [2:0] rem_intra4x4_pred_mode;
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output prev_intra4x4_pred_mode_flag;
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output [7:0] mvd;
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output [3:0] mv_below8x8;
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//--------------------------
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//start_code_prefix
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//--------------------------
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reg start_code_prefix_found;
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always @ (parser_state or BitStream_buffer_output)
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if (parser_state == `start_code_prefix)
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begin
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if (BitStream_buffer_output == 16'b0000000000000001)
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start_code_prefix_found <= 1;
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else
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start_code_prefix_found <= 0;
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end
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else
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start_code_prefix_found <= 0;
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//--------------------------
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//nal_unit
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//--------------------------
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reg forbidden_zero_bit;
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reg [1:0] nal_ref_idc;
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reg [4:0] nal_unit_type_reg;
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wire [4:0] nal_unit_type;
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assign nal_unit_type = (nal_unit_state == `forbidden_zero_bit_2_nal_unit_type)? BitStream_buffer_output[12:8]:nal_unit_type_reg;
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always @ (posedge clk)
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if (reset_n == 0)
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begin
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forbidden_zero_bit <= 0;
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nal_ref_idc <= 0;
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nal_unit_type_reg <= 0;
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end
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else if (nal_unit_state == `forbidden_zero_bit_2_nal_unit_type)
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begin
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forbidden_zero_bit <= BitStream_buffer_output[15];
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nal_ref_idc <= BitStream_buffer_output[14:13];
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nal_unit_type_reg <= nal_unit_type;
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end
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//--------------------------
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//seq_parameter_set
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//--------------------------
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reg [7:0] profile_idc;
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reg constraint_set0_flag,constraint_set1_flag,constraint_set2_flag,constraint_set3_flag;
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reg [3:0] reserved_zero_4bits;
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reg [7:0] level_idc;
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reg [4:0] seq_parameter_set_id_sps;
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reg [3:0] log2_max_frame_num_minus4;
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reg [1:0] pic_order_cnt_type;
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reg [3:0] log2_max_pic_order_cnt_lsb_minus4;
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reg [2:0] num_ref_frames; //however,we only support 1 reference frame currently
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reg gaps_in_frame_num_value_allowed_flag;
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reg [3:0] pic_width_in_mbs_minus1;
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reg [3:0] pic_height_in_map_units_minus1;
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reg frame_mbs_only_flag;
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reg direct_8x8_inference_flag;
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reg frame_cropping_flag;
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reg vui_parameter_present_flag;
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always @ (posedge clk)
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if (reset_n == 0)
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begin
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profile_idc <= 0;
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constraint_set0_flag <= 0;
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constraint_set1_flag <= 0;
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constraint_set2_flag <= 0;
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constraint_set3_flag <= 0;
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reserved_zero_4bits <= 0;
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level_idc <= 0;
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seq_parameter_set_id_sps <= 0;
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log2_max_frame_num_minus4 <= 0;
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pic_order_cnt_type <= 0;
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log2_max_pic_order_cnt_lsb_minus4 <= 0;
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num_ref_frames <= 0;
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gaps_in_frame_num_value_allowed_flag <= 0;
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pic_width_in_mbs_minus1 <= 0;
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pic_height_in_map_units_minus1 <= 0;
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frame_mbs_only_flag <= 0;
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direct_8x8_inference_flag <= 0;
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frame_cropping_flag <= 0;
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vui_parameter_present_flag <= 0;
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end
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else
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case (seq_parameter_set_state)
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`fixed_header:
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begin
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profile_idc <= BitStream_buffer_output[15:8];
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constraint_set0_flag <= BitStream_buffer_output[7];
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constraint_set1_flag <= BitStream_buffer_output[6];
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constraint_set2_flag <= BitStream_buffer_output[5];
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constraint_set3_flag <= BitStream_buffer_output[4];
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reserved_zero_4bits <= BitStream_buffer_output[3:0];
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end
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`level_idc_s :level_idc <= BitStream_buffer_output[15:8];
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`seq_parameter_set_id_sps_s :seq_parameter_set_id_sps <= exp_golomb_decoding_output[4:0];
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`log2_max_frame_num_minus4_s :log2_max_frame_num_minus4 <= exp_golomb_decoding_output[3:0];
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`pic_order_cnt_type_s :pic_order_cnt_type <= exp_golomb_decoding_output[1:0];
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`log2_max_pic_order_cnt_lsb_minus4_s :log2_max_pic_order_cnt_lsb_minus4 <= exp_golomb_decoding_output[3:0];
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`num_ref_frames_s :num_ref_frames <= exp_golomb_decoding_output[0];
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`gaps_in_frame_num_value_allowed_flag_s:gaps_in_frame_num_value_allowed_flag <= BitStream_buffer_output[15];
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`pic_width_in_mbs_minus1_s :pic_width_in_mbs_minus1 <= exp_golomb_decoding_output[3:0];
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`pic_height_in_map_units_minus1_s :pic_height_in_map_units_minus1 <= exp_golomb_decoding_output[3:0];
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`frame_mbs_only_flag_2_frame_cropping_flag:
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begin
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frame_mbs_only_flag <= BitStream_buffer_output[15];
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direct_8x8_inference_flag <= BitStream_buffer_output[14];
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frame_cropping_flag <= BitStream_buffer_output[13];
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end
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`vui_parameter_present_flag_s:vui_parameter_present_flag <= BitStream_buffer_output[15];
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endcase
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//--------------------------
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//pic_parameter_set
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//--------------------------
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reg [7:0] pic_parameter_set_id_pps;
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reg [4:0] seq_parameter_set_id_pps;
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reg entropy_coding_mode_flag;
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reg pic_order_present_flag;
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reg [2:0] num_slice_groups_minus1;
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reg [2:0] num_ref_idx_l0_active_minus1;
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reg [2:0] num_ref_idx_l1_active_minus1;
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reg weighted_pred_flag;
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reg [1:0] weighted_bipred_idc;
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reg [5:0] pic_init_qp_minus26,pic_init_qs_minus26;
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reg [4:0] chroma_qp_index_offset;
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reg deblocking_filter_control_present_flag;
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reg constrained_intra_pred_flag;
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reg redundant_pic_cnt_present_flag;
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always @ (posedge clk)
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if (reset_n == 0)
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begin
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pic_parameter_set_id_pps <= 0;
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seq_parameter_set_id_pps <= 0;
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entropy_coding_mode_flag <= 0;
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pic_order_present_flag <= 0;
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num_slice_groups_minus1 <= 0;
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num_ref_idx_l0_active_minus1 <= 0;
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num_ref_idx_l1_active_minus1 <= 0;
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weighted_pred_flag <= 0;
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weighted_bipred_idc <= 0;
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pic_init_qp_minus26 <= 0;
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pic_init_qs_minus26 <= 0;
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chroma_qp_index_offset <= 0;
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deblocking_filter_control_present_flag <= 0;
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constrained_intra_pred_flag <= 0;
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redundant_pic_cnt_present_flag <= 0;
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end
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else
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case (pic_parameter_set_state)
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`pic_parameter_set_id_pps_s:pic_parameter_set_id_pps <= exp_golomb_decoding_output[7:0];
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`seq_parameter_set_id_pps_s:seq_parameter_set_id_pps <= exp_golomb_decoding_output[4:0];
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`entropy_coding_mode_flag_2_pic_order_present_flag:
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begin
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entropy_coding_mode_flag <= BitStream_buffer_output[15];
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pic_order_present_flag <= BitStream_buffer_output[14];
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end
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`num_slice_groups_minus1_s :num_slice_groups_minus1 <= exp_golomb_decoding_output[2:0];
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`num_ref_idx_l0_active_minus1_pps_s:num_ref_idx_l0_active_minus1 <= exp_golomb_decoding_output[2:0];
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`num_ref_idx_l1_active_minus1_pps_s:num_ref_idx_l1_active_minus1 <= exp_golomb_decoding_output[2:0];
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`weighted_pred_flag_2_weighted_bipred_idc:
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begin
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weighted_pred_flag <= BitStream_buffer_output[15];
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weighted_bipred_idc <= BitStream_buffer_output[14:13];
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end
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`pic_init_qp_minus26_s :pic_init_qp_minus26 <= exp_golomb_decoding_output[5:0];
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`pic_init_qs_minus26_s :pic_init_qs_minus26 <= exp_golomb_decoding_output[5:0];
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`chroma_qp_index_offset_s:chroma_qp_index_offset <= exp_golomb_decoding_output[4:0];
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`deblocking_filter_control_2_redundant_pic_cnt_present_flag:
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begin
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| 243 |
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deblocking_filter_control_present_flag <= BitStream_buffer_output[15];
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constrained_intra_pred_flag <= BitStream_buffer_output[14];
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redundant_pic_cnt_present_flag <= BitStream_buffer_output[13];
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end
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endcase
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//--------------------------
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| 249 |
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//slice_header
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| 250 |
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//--------------------------
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| 251 |
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reg first_mb_in_slice;
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| 252 |
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reg [2:0] slice_type;
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| 253 |
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reg [7:0] pic_parameter_set_id_slice_header;
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| 254 |
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reg [3:0] frame_num;
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| 255 |
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reg idr_pic_id;
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| 256 |
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reg [9:0] pic_order_cnt_lsb;
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| 257 |
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reg num_ref_idx_active_override_flag;
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| 258 |
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reg [1:0] disable_deblocking_filter_idc;
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| 259 |
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reg [3:0] slice_alpha_c0_offset_div2_dec;
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| 260 |
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reg [3:0] slice_beta_offset_div2_dec;
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| 261 |
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always @ (posedge clk)
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| 262 |
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if (reset_n == 0)
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begin
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| 264 |
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first_mb_in_slice <= 0;
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| 265 |
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slice_type <= 0;
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| 266 |
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pic_parameter_set_id_slice_header <= 0;
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| 267 |
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frame_num <= 0;
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| 268 |
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idr_pic_id <= 0;
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| 269 |
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pic_order_cnt_lsb <= 0;
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| 270 |
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num_ref_idx_active_override_flag <= 0;
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| 271 |
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disable_deblocking_filter_idc <= 0;
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| 272 |
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slice_alpha_c0_offset_div2_dec <= 0;
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| 273 |
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slice_beta_offset_div2_dec <= 0;
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| 274 |
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end
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| 275 |
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else
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| 276 |
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case (slice_header_state)
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`first_mb_in_slice_s :first_mb_in_slice <= exp_golomb_decoding_output[0];
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| 278 |
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`slice_type_s :slice_type <= exp_golomb_decoding_output[2:0];
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| 279 |
|
|
`pic_parameter_set_id_slice_header_s:pic_parameter_set_id_slice_header <= exp_golomb_decoding_output;
|
| 280 |
|
|
`frame_num_s :frame_num <= dependent_variable_decoding_output[3:0];
|
| 281 |
|
|
`idr_pic_id_s :idr_pic_id <= exp_golomb_decoding_output[0];
|
| 282 |
|
|
`pic_order_cnt_lsb_s :pic_order_cnt_lsb <= dependent_variable_decoding_output[9:0];
|
| 283 |
|
|
`num_ref_idx_active_override_flag_s :num_ref_idx_active_override_flag <= BitStream_buffer_output[15];
|
| 284 |
|
|
//num_ref_idx_l0_active_minus1_slice_header_s:
|
| 285 |
|
|
//slice_qp_delta_s:slice_qp_delta <= exp_golomb_decoding_output[5:0];
|
| 286 |
|
|
`disable_deblocking_filter_idc_s :disable_deblocking_filter_idc <= exp_golomb_decoding_output[1:0];
|
| 287 |
|
|
`slice_alpha_c0_offset_div2_s :slice_alpha_c0_offset_div2_dec <= exp_golomb_decoding_output[3:0];
|
| 288 |
|
|
`slice_beta_offset_div2_s :slice_beta_offset_div2_dec <= exp_golomb_decoding_output[3:0];
|
| 289 |
|
|
//slice_group_change_cycle_s:
|
| 290 |
|
|
endcase
|
| 291 |
|
|
|
| 292 |
|
|
wire [3:0] slice_alpha_c0_offset_div2;
|
| 293 |
|
|
wire [3:0] slice_beta_offset_div2;
|
| 294 |
|
|
assign slice_alpha_c0_offset_div2 = {4{deblocking_filter_control_present_flag}} & slice_alpha_c0_offset_div2_dec;
|
| 295 |
|
|
assign slice_beta_offset_div2 = {4{deblocking_filter_control_present_flag}} & slice_beta_offset_div2_dec;
|
| 296 |
|
|
|
| 297 |
|
|
reg sw_disable_DF;
|
| 298 |
|
|
always @ (posedge clk)
|
| 299 |
|
|
if (reset_n == 0)
|
| 300 |
|
|
sw_disable_DF <= 0;
|
| 301 |
|
|
else if (slice_header_state == `disable_deblocking_filter_idc_s && disable_deblocking_filter_idc == 1)
|
| 302 |
|
|
sw_disable_DF <= 1;
|
| 303 |
|
|
else
|
| 304 |
|
|
sw_disable_DF <= 0;
|
| 305 |
|
|
|
| 306 |
|
|
assign disable_DF = sw_disable_DF | pin_disable_DF;
|
| 307 |
|
|
//--------------------------
|
| 308 |
|
|
//slice_data
|
| 309 |
|
|
//--------------------------
|
| 310 |
|
|
wire [6:0] mb_skip_run;
|
| 311 |
|
|
reg [6:0] mb_skip_run_reg;
|
| 312 |
|
|
reg [4:0] mb_type;
|
| 313 |
|
|
reg [3:0] mb_type_general;
|
| 314 |
|
|
reg [3:0] mb_type_general_reg;
|
| 315 |
|
|
reg [1:0] Intra16x16_predmode;
|
| 316 |
|
|
|
| 317 |
|
|
//mb_type_general
|
| 318 |
|
|
assign mb_skip_run = (slice_data_state == `mb_skip_run_s)? exp_golomb_decoding_output[6:0]:mb_skip_run_reg;
|
| 319 |
|
|
always @ (slice_data_state or slice_type or exp_golomb_decoding_output or mb_type_general_reg)
|
| 320 |
|
|
if (slice_data_state == `skip_run_duration)
|
| 321 |
|
|
mb_type_general <= `MB_P_skip;
|
| 322 |
|
|
else if (slice_data_state == `mb_type_s)
|
| 323 |
|
|
begin
|
| 324 |
|
|
if (slice_type == 2 || slice_type == 7) //I slice
|
| 325 |
|
|
case (exp_golomb_decoding_output)
|
| 326 |
|
|
0: mb_type_general <= `MB_Intra4x4;
|
| 327 |
|
|
1,2,3,4,13,14,15,16: mb_type_general <= `MB_Intra16x16_CBPChroma0;
|
| 328 |
|
|
5,6,7,8,17,18,19,20: mb_type_general <= `MB_Intra16x16_CBPChroma1;
|
| 329 |
|
|
9,10,11,12,21,22,23,24: mb_type_general <= `MB_Intra16x16_CBPChroma2;
|
| 330 |
|
|
default: mb_type_general <= `MB_Inter16x16;
|
| 331 |
|
|
endcase
|
| 332 |
|
|
else //P slice
|
| 333 |
|
|
case (exp_golomb_decoding_output)
|
| 334 |
|
|
0: mb_type_general <= `MB_Inter16x16;
|
| 335 |
|
|
1: mb_type_general <= `MB_Inter16x8;
|
| 336 |
|
|
2: mb_type_general <= `MB_Inter8x16;
|
| 337 |
|
|
3: mb_type_general <= `MB_P_8x8;
|
| 338 |
|
|
4: mb_type_general <= `MB_P_8x8ref0;
|
| 339 |
|
|
5: mb_type_general <= `MB_Intra4x4;
|
| 340 |
|
|
6,7,8,9,18,19,20,21: mb_type_general <= `MB_Intra16x16_CBPChroma0;
|
| 341 |
|
|
10,11,12,13,22,23,24,25:mb_type_general <= `MB_Intra16x16_CBPChroma1;
|
| 342 |
|
|
14,15,16,17,26,27,28,29:mb_type_general <= `MB_Intra16x16_CBPChroma0;
|
| 343 |
|
|
default: mb_type_general <= `MB_Inter16x8;
|
| 344 |
|
|
endcase
|
| 345 |
|
|
end
|
| 346 |
|
|
else
|
| 347 |
|
|
mb_type_general <= mb_type_general_reg;
|
| 348 |
|
|
|
| 349 |
|
|
//Intra16x16_predmode
|
| 350 |
|
|
always @ (posedge clk)
|
| 351 |
|
|
if (reset_n == 0)
|
| 352 |
|
|
Intra16x16_predmode <= 2'b0;
|
| 353 |
|
|
else if (slice_data_state == `mb_type_s)
|
| 354 |
|
|
begin
|
| 355 |
|
|
if (slice_type == 2 || slice_type == 7) //I slice
|
| 356 |
|
|
begin
|
| 357 |
|
|
if (exp_golomb_decoding_output != 0)
|
| 358 |
|
|
case (exp_golomb_decoding_output[1:0])
|
| 359 |
|
|
2'b00:Intra16x16_predmode <= 2'b11;
|
| 360 |
|
|
2'b01:Intra16x16_predmode <= 2'b00;
|
| 361 |
|
|
2'b10:Intra16x16_predmode <= 2'b01;
|
| 362 |
|
|
2'b11:Intra16x16_predmode <= 2'b10;
|
| 363 |
|
|
endcase
|
| 364 |
|
|
end
|
| 365 |
|
|
else if (exp_golomb_decoding_output[4:0] > 5) //P slice
|
| 366 |
|
|
case (exp_golomb_decoding_output[1:0])
|
| 367 |
|
|
2'b00:Intra16x16_predmode <= 2'b10;
|
| 368 |
|
|
2'b01:Intra16x16_predmode <= 2'b11;
|
| 369 |
|
|
2'b10:Intra16x16_predmode <= 2'b00;
|
| 370 |
|
|
2'b11:Intra16x16_predmode <= 2'b01;
|
| 371 |
|
|
endcase
|
| 372 |
|
|
end
|
| 373 |
|
|
|
| 374 |
|
|
always @ (posedge clk)
|
| 375 |
|
|
if (reset_n == 0)
|
| 376 |
|
|
begin
|
| 377 |
|
|
mb_skip_run_reg <= 0;
|
| 378 |
|
|
mb_type <= 0;
|
| 379 |
|
|
mb_type_general_reg <= `MB_type_rst;
|
| 380 |
|
|
end
|
| 381 |
|
|
else
|
| 382 |
|
|
case (slice_data_state)
|
| 383 |
|
|
`mb_skip_run_s:mb_skip_run_reg <= mb_skip_run;
|
| 384 |
|
|
`skip_run_duration:
|
| 385 |
|
|
begin
|
| 386 |
|
|
mb_type <= 5'd31;
|
| 387 |
|
|
mb_type_general_reg <= mb_type_general;
|
| 388 |
|
|
end
|
| 389 |
|
|
`mb_type_s:
|
| 390 |
|
|
begin
|
| 391 |
|
|
mb_type <= exp_golomb_decoding_output[4:0];
|
| 392 |
|
|
mb_type_general_reg <= mb_type_general;
|
| 393 |
|
|
end
|
| 394 |
|
|
//pcm_byte_s: --> Currently no deal with it
|
| 395 |
|
|
//coded_block_pattern_s: --> See CodedBlockPattern_decoding.v
|
| 396 |
|
|
//mb_qp_delta_s:mb_qp_delta <= exp_golomb_decoding_output;
|
| 397 |
|
|
endcase
|
| 398 |
|
|
//Update MBTypeGen information
|
| 399 |
|
|
reg [1:0] MBTypeGen_mbAddrA;
|
| 400 |
|
|
reg MBTypeGen_mbAddrD_tmp;
|
| 401 |
|
|
reg MBTypeGen_mbAddrD;
|
| 402 |
|
|
reg [21:0] MBTypeGen_mbAddrB_reg;
|
| 403 |
|
|
always @ (posedge clk)
|
| 404 |
|
|
if (reset_n == 0)
|
| 405 |
|
|
begin
|
| 406 |
|
|
MBTypeGen_mbAddrA <= 0;
|
| 407 |
|
|
MBTypeGen_mbAddrD_tmp <= 0;
|
| 408 |
|
|
MBTypeGen_mbAddrB_reg <= 0;
|
| 409 |
|
|
end
|
| 410 |
|
|
else if (slice_data_state == `skip_run_duration && end_of_MB_DEC)//for P_skip
|
| 411 |
|
|
begin
|
| 412 |
|
|
if (mb_num_h != 10)
|
| 413 |
|
|
MBTypeGen_mbAddrA <= `MB_addrA_addrB_P_skip;
|
| 414 |
|
|
if (mb_num_h == 9)
|
| 415 |
|
|
MBTypeGen_mbAddrD_tmp <= 1'b0;
|
| 416 |
|
|
if (mb_num_v != 8)
|
| 417 |
|
|
case (mb_num_h)
|
| 418 |
|
|
0:MBTypeGen_mbAddrB_reg[1:0] <= `MB_addrA_addrB_P_skip;1:MBTypeGen_mbAddrB_reg[3:2] <= `MB_addrA_addrB_P_skip;
|
| 419 |
|
|
2:MBTypeGen_mbAddrB_reg[5:4] <= `MB_addrA_addrB_P_skip;3:MBTypeGen_mbAddrB_reg[7:6] <= `MB_addrA_addrB_P_skip;
|
| 420 |
|
|
4:MBTypeGen_mbAddrB_reg[9:8] <= `MB_addrA_addrB_P_skip;5:MBTypeGen_mbAddrB_reg[11:10] <= `MB_addrA_addrB_P_skip;
|
| 421 |
|
|
6:MBTypeGen_mbAddrB_reg[13:12] <= `MB_addrA_addrB_P_skip;7:MBTypeGen_mbAddrB_reg[15:14] <= `MB_addrA_addrB_P_skip;
|
| 422 |
|
|
8:MBTypeGen_mbAddrB_reg[17:16] <= `MB_addrA_addrB_P_skip;9:MBTypeGen_mbAddrB_reg[19:18] <= `MB_addrA_addrB_P_skip;
|
| 423 |
|
|
10:MBTypeGen_mbAddrB_reg[21:20] <= `MB_addrA_addrB_P_skip;
|
| 424 |
|
|
endcase
|
| 425 |
|
|
end
|
| 426 |
|
|
else if (slice_data_state == `mb_num_update)
|
| 427 |
|
|
begin
|
| 428 |
|
|
if (mb_num_h != 10)
|
| 429 |
|
|
begin
|
| 430 |
|
|
if (mb_type_general[3] == 1'b0)
|
| 431 |
|
|
MBTypeGen_mbAddrA <= `MB_addrA_addrB_Inter;
|
| 432 |
|
|
else if (mb_type_general[3:2] == 2'b10)
|
| 433 |
|
|
MBTypeGen_mbAddrA <= `MB_addrA_addrB_Intra16x16;
|
| 434 |
|
|
else if (mb_type_general == `MB_Intra4x4)
|
| 435 |
|
|
MBTypeGen_mbAddrA <= `MB_addrA_addrB_Intra4x4;
|
| 436 |
|
|
end
|
| 437 |
|
|
if (mb_num_h == 9)
|
| 438 |
|
|
MBTypeGen_mbAddrD_tmp <= mb_type_general[3];
|
| 439 |
|
|
if (mb_num_v != 8)
|
| 440 |
|
|
begin
|
| 441 |
|
|
if (mb_type_general[3] == 1'b0)
|
| 442 |
|
|
case (mb_num_h)
|
| 443 |
|
|
0:MBTypeGen_mbAddrB_reg[1:0] <= `MB_addrA_addrB_Inter; 1:MBTypeGen_mbAddrB_reg[3:2] <= `MB_addrA_addrB_Inter;
|
| 444 |
|
|
2:MBTypeGen_mbAddrB_reg[5:4] <= `MB_addrA_addrB_Inter; 3:MBTypeGen_mbAddrB_reg[7:6] <= `MB_addrA_addrB_Inter;
|
| 445 |
|
|
4:MBTypeGen_mbAddrB_reg[9:8] <= `MB_addrA_addrB_Inter; 5:MBTypeGen_mbAddrB_reg[11:10] <= `MB_addrA_addrB_Inter;
|
| 446 |
|
|
6:MBTypeGen_mbAddrB_reg[13:12] <= `MB_addrA_addrB_Inter; 7:MBTypeGen_mbAddrB_reg[15:14] <= `MB_addrA_addrB_Inter;
|
| 447 |
|
|
8:MBTypeGen_mbAddrB_reg[17:16] <= `MB_addrA_addrB_Inter; 9:MBTypeGen_mbAddrB_reg[19:18] <= `MB_addrA_addrB_Inter;
|
| 448 |
|
|
10:MBTypeGen_mbAddrB_reg[21:20]<= `MB_addrA_addrB_Inter;
|
| 449 |
|
|
endcase
|
| 450 |
|
|
else if (mb_type_general[3:2] == 2'b10)
|
| 451 |
|
|
case (mb_num_h)
|
| 452 |
|
|
0:MBTypeGen_mbAddrB_reg[1:0] <= `MB_addrA_addrB_Intra16x16; 1:MBTypeGen_mbAddrB_reg[3:2] <= `MB_addrA_addrB_Intra16x16;
|
| 453 |
|
|
2:MBTypeGen_mbAddrB_reg[5:4] <= `MB_addrA_addrB_Intra16x16; 3:MBTypeGen_mbAddrB_reg[7:6] <= `MB_addrA_addrB_Intra16x16;
|
| 454 |
|
|
4:MBTypeGen_mbAddrB_reg[9:8] <= `MB_addrA_addrB_Intra16x16; 5:MBTypeGen_mbAddrB_reg[11:10] <= `MB_addrA_addrB_Intra16x16;
|
| 455 |
|
|
6:MBTypeGen_mbAddrB_reg[13:12] <= `MB_addrA_addrB_Intra16x16; 7:MBTypeGen_mbAddrB_reg[15:14] <= `MB_addrA_addrB_Intra16x16;
|
| 456 |
|
|
8:MBTypeGen_mbAddrB_reg[17:16] <= `MB_addrA_addrB_Intra16x16; 9:MBTypeGen_mbAddrB_reg[19:18] <= `MB_addrA_addrB_Intra16x16;
|
| 457 |
|
|
10:MBTypeGen_mbAddrB_reg[21:20]<= `MB_addrA_addrB_Intra16x16;
|
| 458 |
|
|
endcase
|
| 459 |
|
|
else if (mb_type_general == `MB_Intra4x4)
|
| 460 |
|
|
case (mb_num_h)
|
| 461 |
|
|
0:MBTypeGen_mbAddrB_reg[1:0] <= `MB_addrA_addrB_Intra4x4; 1:MBTypeGen_mbAddrB_reg[3:2] <= `MB_addrA_addrB_Intra4x4;
|
| 462 |
|
|
2:MBTypeGen_mbAddrB_reg[5:4] <= `MB_addrA_addrB_Intra4x4; 3:MBTypeGen_mbAddrB_reg[7:6] <= `MB_addrA_addrB_Intra4x4;
|
| 463 |
|
|
4:MBTypeGen_mbAddrB_reg[9:8] <= `MB_addrA_addrB_Intra4x4; 5:MBTypeGen_mbAddrB_reg[11:10] <= `MB_addrA_addrB_Intra4x4;
|
| 464 |
|
|
6:MBTypeGen_mbAddrB_reg[13:12] <= `MB_addrA_addrB_Intra4x4; 7:MBTypeGen_mbAddrB_reg[15:14] <= `MB_addrA_addrB_Intra4x4;
|
| 465 |
|
|
8:MBTypeGen_mbAddrB_reg[17:16] <= `MB_addrA_addrB_Intra4x4; 9:MBTypeGen_mbAddrB_reg[19:18] <= `MB_addrA_addrB_Intra4x4;
|
| 466 |
|
|
10:MBTypeGen_mbAddrB_reg[21:20]<= `MB_addrA_addrB_Intra4x4;
|
| 467 |
|
|
endcase
|
| 468 |
|
|
end
|
| 469 |
|
|
end
|
| 470 |
|
|
|
| 471 |
|
|
always @ (posedge clk)
|
| 472 |
|
|
if (reset_n == 1'b0)
|
| 473 |
|
|
MBTypeGen_mbAddrD <= 0;
|
| 474 |
|
|
else if (mb_num_h == 0)
|
| 475 |
|
|
MBTypeGen_mbAddrD <= MBTypeGen_mbAddrD_tmp;
|
| 476 |
|
|
|
| 477 |
|
|
//----------------------------------------------------------------------
|
| 478 |
|
|
//mb_pred & sub_mb_pred
|
| 479 |
|
|
// --> Also refer to Intra4x4_PredMode_decoding.v & Inter_mv_decoding.v
|
| 480 |
|
|
//----------------------------------------------------------------------
|
| 481 |
|
|
wire prev_intra4x4_pred_mode_flag;
|
| 482 |
|
|
reg prev_intra4x4_pred_mode_flag_reg;
|
| 483 |
|
|
wire [2:0] rem_intra4x4_pred_mode;
|
| 484 |
|
|
reg [2:0] rem_intra4x4_pred_mode_reg;
|
| 485 |
|
|
reg [1:0] intra_chroma_pred_mode;
|
| 486 |
|
|
wire [7:0] mvd;
|
| 487 |
|
|
reg [7:0] mvd_reg;
|
| 488 |
|
|
reg [7:0] sub_mb_type_reg;
|
| 489 |
|
|
assign prev_intra4x4_pred_mode_flag = (mb_pred_state == `prev_intra4x4_pred_mode_flag_s)? BitStream_buffer_output[15]:prev_intra4x4_pred_mode_flag_reg;
|
| 490 |
|
|
assign rem_intra4x4_pred_mode = (mb_pred_state == `rem_intra4x4_pred_mode_s)? BitStream_buffer_output[15:13]:rem_intra4x4_pred_mode_reg;
|
| 491 |
|
|
assign mvd = ((mb_pred_state == `mvd_l0_s) || (sub_mb_pred_state == `sub_mvd_l0_s))? exp_golomb_decoding_output[7:0]:mvd_reg;
|
| 492 |
|
|
always @ (posedge clk)
|
| 493 |
|
|
if (reset_n == 0)
|
| 494 |
|
|
begin
|
| 495 |
|
|
prev_intra4x4_pred_mode_flag_reg <= 0;
|
| 496 |
|
|
rem_intra4x4_pred_mode_reg <= 0;
|
| 497 |
|
|
intra_chroma_pred_mode <= 0;
|
| 498 |
|
|
mvd_reg <= 0;
|
| 499 |
|
|
sub_mb_type_reg <= 0;
|
| 500 |
|
|
end
|
| 501 |
|
|
else
|
| 502 |
|
|
begin
|
| 503 |
|
|
case (mb_pred_state)
|
| 504 |
|
|
`prev_intra4x4_pred_mode_flag_s:prev_intra4x4_pred_mode_flag_reg <= prev_intra4x4_pred_mode_flag;
|
| 505 |
|
|
`rem_intra4x4_pred_mode_s :rem_intra4x4_pred_mode_reg <= rem_intra4x4_pred_mode;
|
| 506 |
|
|
`intra_chroma_pred_mode_s :intra_chroma_pred_mode <= exp_golomb_decoding_output[1:0];
|
| 507 |
|
|
//ref_idx_l0_s: --> only 1 reference frame,so never jump into this state
|
| 508 |
|
|
`mvd_l0_s: mvd_reg <= mvd;
|
| 509 |
|
|
endcase
|
| 510 |
|
|
case (sub_mb_pred_state)
|
| 511 |
|
|
`sub_mb_type_s:
|
| 512 |
|
|
case (mbPartIdx)
|
| 513 |
|
|
0:sub_mb_type_reg[1:0] <= exp_golomb_decoding_output[1:0];
|
| 514 |
|
|
1:sub_mb_type_reg[3:2] <= exp_golomb_decoding_output[1:0];
|
| 515 |
|
|
2:sub_mb_type_reg[5:4] <= exp_golomb_decoding_output[1:0];
|
| 516 |
|
|
3:sub_mb_type_reg[7:6] <= exp_golomb_decoding_output[1:0];
|
| 517 |
|
|
endcase
|
| 518 |
|
|
//sub_ref_idx_l0_s: --> only 1 reference frame,so never jump into this state
|
| 519 |
|
|
`sub_mvd_l0_s: mvd_reg <= mvd;
|
| 520 |
|
|
endcase
|
| 521 |
|
|
end
|
| 522 |
|
|
reg [2:0] NumMbPart;
|
| 523 |
|
|
reg [2:0] NumSubMbPart;
|
| 524 |
|
|
reg [1:0] sub_mb_type;
|
| 525 |
|
|
always @ (sub_mb_pred_state or sub_mb_type_reg or mbPartIdx)
|
| 526 |
|
|
if (sub_mb_pred_state == `sub_mvd_l0_s)
|
| 527 |
|
|
case (mbPartIdx)
|
| 528 |
|
|
0:sub_mb_type <= sub_mb_type_reg[1:0];
|
| 529 |
|
|
1:sub_mb_type <= sub_mb_type_reg[3:2];
|
| 530 |
|
|
2:sub_mb_type <= sub_mb_type_reg[5:4];
|
| 531 |
|
|
3:sub_mb_type <= sub_mb_type_reg[7:6];
|
| 532 |
|
|
endcase
|
| 533 |
|
|
else
|
| 534 |
|
|
sub_mb_type <= 0;
|
| 535 |
|
|
always @ (mb_pred_state or mb_type_general or sub_mb_pred_state)
|
| 536 |
|
|
if (mb_pred_state == `mvd_l0_s)
|
| 537 |
|
|
case (mb_type_general)
|
| 538 |
|
|
0:NumMbPart <= 3'd1;
|
| 539 |
|
|
default:NumMbPart <= 3'd2;
|
| 540 |
|
|
endcase
|
| 541 |
|
|
else if (sub_mb_pred_state == `sub_mvd_l0_s)
|
| 542 |
|
|
NumMbPart <= 3'd4;
|
| 543 |
|
|
else
|
| 544 |
|
|
NumMbPart <= 3'd0;
|
| 545 |
|
|
always @ (sub_mb_pred_state or mbPartIdx or sub_mb_type_reg)
|
| 546 |
|
|
if (sub_mb_pred_state == `sub_mvd_l0_s)
|
| 547 |
|
|
case (mbPartIdx)
|
| 548 |
|
|
0:
|
| 549 |
|
|
case (sub_mb_type_reg[1:0])
|
| 550 |
|
|
2'b00 :NumSubMbPart <= 3'd1;
|
| 551 |
|
|
2'b01,2'b10:NumSubMbPart <= 3'd2;
|
| 552 |
|
|
2'b11 :NumSubMbPart <= 3'd4;
|
| 553 |
|
|
endcase
|
| 554 |
|
|
1:
|
| 555 |
|
|
case (sub_mb_type_reg[3:2])
|
| 556 |
|
|
2'b00 :NumSubMbPart <= 3'd1;
|
| 557 |
|
|
2'b01,2'b10:NumSubMbPart <= 3'd2;
|
| 558 |
|
|
2'b11 :NumSubMbPart <= 3'd4;
|
| 559 |
|
|
endcase
|
| 560 |
|
|
2:
|
| 561 |
|
|
case (sub_mb_type_reg[5:4])
|
| 562 |
|
|
2'b00 :NumSubMbPart <= 3'd1;
|
| 563 |
|
|
2'b01,2'b10:NumSubMbPart <= 3'd2;
|
| 564 |
|
|
2'b11 :NumSubMbPart <= 3'd4;
|
| 565 |
|
|
endcase
|
| 566 |
|
|
3:
|
| 567 |
|
|
case (sub_mb_type_reg[7:6])
|
| 568 |
|
|
2'b00 :NumSubMbPart <= 3'd1;
|
| 569 |
|
|
2'b01,2'b10:NumSubMbPart <= 3'd2;
|
| 570 |
|
|
2'b11 :NumSubMbPart <= 3'd4;
|
| 571 |
|
|
endcase
|
| 572 |
|
|
endcase
|
| 573 |
|
|
else
|
| 574 |
|
|
NumSubMbPart <= 0;
|
| 575 |
|
|
|
| 576 |
|
|
//mv_below8x8
|
| 577 |
|
|
reg [3:0] mv_below8x8;
|
| 578 |
|
|
always @ (posedge clk)
|
| 579 |
|
|
if (reset_n == 1'b0)
|
| 580 |
|
|
mv_below8x8 <= 4'b0;
|
| 581 |
|
|
else if (sub_mb_pred_state == `sub_mb_type_s)
|
| 582 |
|
|
case (mbPartIdx)
|
| 583 |
|
|
0:mv_below8x8[0] <= (exp_golomb_decoding_output[1:0] == 2'b00)? 1'b0:1'b1;
|
| 584 |
|
|
1:mv_below8x8[1] <= (exp_golomb_decoding_output[1:0] == 2'b00)? 1'b0:1'b1;
|
| 585 |
|
|
2:mv_below8x8[2] <= (exp_golomb_decoding_output[1:0] == 2'b00)? 1'b0:1'b1;
|
| 586 |
|
|
3:mv_below8x8[3] <= (exp_golomb_decoding_output[1:0] == 2'b00)? 1'b0:1'b1;
|
| 587 |
|
|
endcase
|
| 588 |
|
|
else if (slice_data_state == `mb_pred || slice_data_state == `skip_run_duration)
|
| 589 |
|
|
mv_below8x8 <= 4'b0;
|
| 590 |
|
|
|
| 591 |
|
|
endmodule
|
| 592 |
|
|
|
| 593 |
|
|
|
| 594 |
|
|
|
| 595 |
|
|
|
| 596 |
|
|
|
| 597 |
|
|
|
| 598 |
|
|
|
| 599 |
|
|
|
| 600 |
|
|
|
| 601 |
|
|
|
| 602 |
|
|
|
| 603 |
|
|
|
| 604 |
|
|
|
| 605 |
|
|
|
| 606 |
|
|
|
| 607 |
|
|
|
| 608 |
|
|
|
| 609 |
|
|
|
| 610 |
|
|
|
| 611 |
|
|
|
| 612 |
|
|
|
| 613 |
|
|
|
| 614 |
|
|
|
| 615 |
|
|
|
| 616 |
|
|
|
| 617 |
|
|
|
| 618 |
|
|
|
| 619 |
|
|
|
| 620 |
|
|
|
| 621 |
|
|
|
| 622 |
|
|
|
