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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 : BitStream_parser_FSM_gating.v
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// Generated : June 26,2005
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// Copyright (C) 2008 Ke Xu
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//-------------------------------------------------------------------------------------------------
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// Description
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// BitStream_parser_FSM,clock gating version
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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 BitStream_parser_FSM (clk,reset_n,end_of_one_blk4x4_sum,end_of_MB_DEC,
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gclk_parser,gclk_nal,gclk_slice,gclk_sps,gclk_pps,gclk_slice_header,
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gclk_slice_data,gclk_residual,gclk_cavlc,
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trigger_CAVLC,BitStream_buffer_valid_n,nal_unit_type,
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slice_type,num_ref_idx_active_override_flag,
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deblocking_filter_control_present_flag,disable_deblocking_filter_idc,
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mb_skip_run,mb_type_general,prev_intra4x4_pred_mode_flag,CodedBlockPatternLuma,
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CodedBlockPatternChroma,pc_2to0,NumSubMbPart,NumMbPart,
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TotalCoeff,TrailingOnes,maxNumCoeff,zerosLeft,run,
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parser_state,nal_unit_state,slice_layer_wo_partitioning_state,slice_header_state,slice_header_s6,
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ref_pic_list_reordering_state,dec_ref_pic_marking_state,slice_data_state,sub_mb_pred_state,
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mb_pred_state,seq_parameter_set_state,pic_parameter_set_state,residual_state,cavlc_decoder_state,
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heading_one_en,pic_num,mb_num,mb_num_h,mb_num_v,
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NextMB_IsSkip,LowerMB_IsSkip,Is_skip_run_entry,Is_skip_run_end,
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luma4x4BlkIdx,mbPartIdx,subMbPartIdx,compIdx,i8x8,i4x4,i4x4_CbCr,
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coeffNum,i_level,i_run,i_TotalCoeff,
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suffix_length_initialized,IsRunLoop);
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input clk;
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input reset_n;
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input end_of_one_blk4x4_sum;
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input end_of_MB_DEC;
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input gclk_parser;
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input gclk_nal;
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input gclk_slice;
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input gclk_sps;
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input gclk_pps;
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input gclk_slice_header;
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input gclk_slice_data;
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input gclk_residual;
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input gclk_cavlc;
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input trigger_CAVLC;
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input BitStream_buffer_valid_n;
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input [4:0] nal_unit_type;
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input [2:0] slice_type;
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input num_ref_idx_active_override_flag;
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input deblocking_filter_control_present_flag;
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input [1:0] disable_deblocking_filter_idc;
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input [6:0] mb_skip_run;
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input [3:0] mb_type_general;
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input prev_intra4x4_pred_mode_flag;
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input [3:0] CodedBlockPatternLuma;
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input [1:0] CodedBlockPatternChroma;
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input [2:0] pc_2to0;
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input [2:0] NumMbPart;
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input [2:0] NumSubMbPart;
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input [4:0] TotalCoeff;
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input [1:0] TrailingOnes;
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input [4:0] maxNumCoeff;
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input [3:0] zerosLeft;
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input [3:0] run;
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output [1:0] parser_state;
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output [2:0] nal_unit_state;
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output [1:0] slice_layer_wo_partitioning_state;
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output [3:0] slice_header_state;
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output slice_header_s6;
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output [2:0] ref_pic_list_reordering_state;
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output [1:0] dec_ref_pic_marking_state;
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output [3:0] slice_data_state;
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output [1:0] sub_mb_pred_state;
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output [2:0] mb_pred_state;
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output [3:0] seq_parameter_set_state;
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output [3:0] pic_parameter_set_state;
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output [3:0] residual_state;
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output [3:0] cavlc_decoder_state;
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output heading_one_en;
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output [5:0] pic_num;
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output [6:0] mb_num;
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output [3:0] mb_num_h;
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output [3:0] mb_num_v;
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output NextMB_IsSkip;
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output LowerMB_IsSkip;
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output Is_skip_run_entry;
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output Is_skip_run_end;
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output [3:0] luma4x4BlkIdx;
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output [1:0] mbPartIdx;
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output [1:0] subMbPartIdx;
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output compIdx;
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output [1:0] i8x8,i4x4;
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output [1:0] i4x4_CbCr;
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output [3:0] coeffNum;
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output [3:0] i_level;
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output [3:0] i_run;
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output [3:0] i_TotalCoeff;
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output suffix_length_initialized;
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output IsRunLoop;
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reg [1:0] parser_state;
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reg [2:0] nal_unit_state;
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reg [1:0] slice_layer_wo_partitioning_state;
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reg [3:0] seq_parameter_set_state;
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reg [3:0] pic_parameter_set_state;
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reg [3:0] slice_header_state;
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reg [2:0] ref_pic_list_reordering_state;
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reg [1:0] dec_ref_pic_marking_state;
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reg [3:0] slice_data_state;
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reg [2:0] mb_pred_state;
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reg [1:0] sub_mb_pred_state;
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reg [3:0] residual_state;
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reg [3:0] cavlc_decoder_state;
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wire heading_one_en;
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reg [6:0] mb_num;
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reg [3:0] mb_num_h;
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reg [3:0] mb_num_v;
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reg [1:0] mbPartIdx;
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reg [1:0] subMbPartIdx;
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reg compIdx;
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reg [1:0] i8x8,i4x4;
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reg [1:0] i4x4_CbCr;
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reg [3:0] coeffNum;
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reg [3:0] coeffNum_reg;
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reg [3:0] i_level,i_run,i_TotalCoeff;
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reg [6:0] count_mb_skip_run;//number of MBs to be skipped
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reg [7:0] count_pcm_byte;
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reg [3:0] luma4x4BlkIdx;
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reg [5:0] pic_num;
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reg suffix_length_initialized;
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reg IsRunLoop;
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/*
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// synopsys translate_off
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integer tracefile;
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initial
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begin
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tracefile = $fopen("trace.txt");
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end
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// synopsys translate_on
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*/
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//--------------
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//parser_state
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//--------------
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always @ (posedge gclk_parser or negedge reset_n)
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if (reset_n == 0)
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parser_state <= `rst_parser;
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else
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case (parser_state)
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`rst_parser :parser_state <= (BitStream_buffer_valid_n == 1'b0)? `start_code_prefix:`rst_parser;
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`start_code_prefix:parser_state <= `nal_unit;
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`nal_unit :parser_state <= `rst_parser;
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endcase
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//---------------
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//nal_unit_state
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//---------------
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always @ (posedge gclk_nal or negedge reset_n)
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if (reset_n == 0)
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nal_unit_state <= `rst_nal_unit;
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else
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case (nal_unit_state)
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`rst_nal_unit:nal_unit_state <= `forbidden_zero_bit_2_nal_unit_type;
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`forbidden_zero_bit_2_nal_unit_type:
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case (nal_unit_type)
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5'b00001:nal_unit_state <= `slice_layer_non_IDR_rbsp;
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5'b00101:nal_unit_state <= `slice_layer_IDR_rbsp;
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5'b00111:nal_unit_state <= `seq_parameter_set_rbsp;
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5'b01000:nal_unit_state <= `pic_parameter_set_rbsp;
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endcase
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`slice_layer_non_IDR_rbsp,`slice_layer_IDR_rbsp:nal_unit_state <= `rbsp_trailing_one_bit;
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`seq_parameter_set_rbsp :nal_unit_state <= `rbsp_trailing_one_bit;
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`pic_parameter_set_rbsp :nal_unit_state <= `rbsp_trailing_one_bit;
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`rbsp_trailing_one_bit :nal_unit_state <= (pc_2to0 == 3'b000)? `rst_nal_unit:`rbsp_trailing_zero_bits;
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`rbsp_trailing_zero_bits:nal_unit_state <= `rst_nal_unit;
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endcase
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//----------------------------------
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//slice_layer_wo_partitioning_state
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//----------------------------------
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always @ (posedge gclk_slice or negedge reset_n)
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if (reset_n == 1'b0)
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slice_layer_wo_partitioning_state <= `rst_slice_layer_wo_partitioning;
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else
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case (slice_layer_wo_partitioning_state)
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`rst_slice_layer_wo_partitioning :slice_layer_wo_partitioning_state <= `slice_header;
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`slice_header :slice_layer_wo_partitioning_state <= `slice_data;
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`slice_data :slice_layer_wo_partitioning_state <= `rst_slice_layer_wo_partitioning;
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endcase
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//------------------------
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//seq_parameter_set_state
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//------------------------
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always @ (posedge gclk_sps or negedge reset_n)
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if (reset_n == 0)
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seq_parameter_set_state <= `rst_seq_parameter_set;
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else
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case (seq_parameter_set_state)
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`rst_seq_parameter_set :seq_parameter_set_state <= `fixed_header;
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`fixed_header :seq_parameter_set_state <= `level_idc_s;
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`level_idc_s :seq_parameter_set_state <= `seq_parameter_set_id_sps_s;
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`seq_parameter_set_id_sps_s :seq_parameter_set_state <= `log2_max_frame_num_minus4_s;
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`log2_max_frame_num_minus4_s :seq_parameter_set_state <= `pic_order_cnt_type_s;
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`pic_order_cnt_type_s :seq_parameter_set_state <= `log2_max_pic_order_cnt_lsb_minus4_s;
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`log2_max_pic_order_cnt_lsb_minus4_s :seq_parameter_set_state <= `num_ref_frames_s;
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`num_ref_frames_s :seq_parameter_set_state <= `gaps_in_frame_num_value_allowed_flag_s;
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`gaps_in_frame_num_value_allowed_flag_s :seq_parameter_set_state <= `pic_width_in_mbs_minus1_s;
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`pic_width_in_mbs_minus1_s :seq_parameter_set_state <= `pic_height_in_map_units_minus1_s;
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`pic_height_in_map_units_minus1_s :seq_parameter_set_state <= `frame_mbs_only_flag_2_frame_cropping_flag;
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`frame_mbs_only_flag_2_frame_cropping_flag:seq_parameter_set_state <= `vui_parameter_present_flag_s;
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`vui_parameter_present_flag_s :seq_parameter_set_state <= `rst_seq_parameter_set;
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endcase
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//------------------------
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//pic_parameter_set_state
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//------------------------
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always @ (posedge gclk_pps or negedge reset_n)
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if (reset_n == 0)
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pic_parameter_set_state <= `rst_pic_parameter_set;
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else
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case (pic_parameter_set_state)
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`rst_pic_parameter_set :pic_parameter_set_state <= `pic_parameter_set_id_pps_s;
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`pic_parameter_set_id_pps_s :pic_parameter_set_state <= `seq_parameter_set_id_pps_s;
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`seq_parameter_set_id_pps_s :pic_parameter_set_state <= `entropy_coding_mode_flag_2_pic_order_present_flag;
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`entropy_coding_mode_flag_2_pic_order_present_flag :pic_parameter_set_state <= `num_slice_groups_minus1_s;
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`num_slice_groups_minus1_s :pic_parameter_set_state <= `num_ref_idx_l0_active_minus1_pps_s;
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`num_ref_idx_l0_active_minus1_pps_s :pic_parameter_set_state <= `num_ref_idx_l1_active_minus1_pps_s;
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`num_ref_idx_l1_active_minus1_pps_s :pic_parameter_set_state <= `weighted_pred_flag_2_weighted_bipred_idc;
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`weighted_pred_flag_2_weighted_bipred_idc :pic_parameter_set_state <= `pic_init_qp_minus26_s;
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`pic_init_qp_minus26_s :pic_parameter_set_state <= `pic_init_qs_minus26_s;
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`pic_init_qs_minus26_s :pic_parameter_set_state <= `chroma_qp_index_offset_s;
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`chroma_qp_index_offset_s :pic_parameter_set_state <= `deblocking_filter_control_2_redundant_pic_cnt_present_flag;
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`deblocking_filter_control_2_redundant_pic_cnt_present_flag:pic_parameter_set_state <= `rst_pic_parameter_set;
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endcase
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//-------------------
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//slice_header_state
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//-------------------
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always @ (posedge gclk_slice_header or negedge reset_n)
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if (reset_n == 0)
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begin
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slice_header_state <= `rst_slice_header;
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ref_pic_list_reordering_state <= `rst_ref_pic_list_reordering;
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dec_ref_pic_marking_state <= `rst_dec_ref_pic_marking;
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end
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else
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case (slice_header_state)
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`rst_slice_header :slice_header_state <= `first_mb_in_slice_s;
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`first_mb_in_slice_s :slice_header_state <= `slice_type_s;
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`slice_type_s :slice_header_state <= `pic_parameter_set_id_slice_header_s;
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`pic_parameter_set_id_slice_header_s:slice_header_state <= `frame_num_s;
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`frame_num_s:
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if (nal_unit_type == 5'b00101) slice_header_state <= `idr_pic_id_s;
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else slice_header_state <= `pic_order_cnt_lsb_s;
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`idr_pic_id_s :slice_header_state <= `pic_order_cnt_lsb_s;
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`pic_order_cnt_lsb_s:
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if (slice_type == 3'b101) slice_header_state <= `num_ref_idx_active_override_flag_s;
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else slice_header_state <= `dec_ref_pic_marking;
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`num_ref_idx_active_override_flag_s:
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if (num_ref_idx_active_override_flag == 1'b1) slice_header_state <= `num_ref_idx_l0_active_minus1_slice_header_s;
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else slice_header_state <= `ref_pic_list_reordering;
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`num_ref_idx_l0_active_minus1_slice_header_s :slice_header_state <= `ref_pic_list_reordering;
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`ref_pic_list_reordering:
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case (ref_pic_list_reordering_state)
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`rst_ref_pic_list_reordering:
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if (slice_type == 3'b101)
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|
|
ref_pic_list_reordering_state <= `ref_pic_list_reordering_flag_l0_s;
|
| 270 |
|
|
else
|
| 271 |
|
|
begin
|
| 272 |
|
|
ref_pic_list_reordering_state <= `rst_ref_pic_list_reordering;
|
| 273 |
|
|
slice_header_state <= `dec_ref_pic_marking;
|
| 274 |
|
|
end
|
| 275 |
|
|
`ref_pic_list_reordering_flag_l0_s:
|
| 276 |
|
|
begin
|
| 277 |
|
|
ref_pic_list_reordering_state <= `rst_ref_pic_list_reordering;
|
| 278 |
|
|
slice_header_state <= `dec_ref_pic_marking;
|
| 279 |
|
|
end
|
| 280 |
|
|
endcase
|
| 281 |
|
|
`dec_ref_pic_marking:
|
| 282 |
|
|
case (dec_ref_pic_marking_state)
|
| 283 |
|
|
`rst_dec_ref_pic_marking:
|
| 284 |
|
|
dec_ref_pic_marking_state <= (nal_unit_type == 3'b101)? `no_output_of_prior_pics_flag_2_long_term_reference_flag:`adaptive_ref_pic_marking_mode_flag_s;
|
| 285 |
|
|
`no_output_of_prior_pics_flag_2_long_term_reference_flag:
|
| 286 |
|
|
begin
|
| 287 |
|
|
dec_ref_pic_marking_state <= `rst_dec_ref_pic_marking;
|
| 288 |
|
|
slice_header_state <= `slice_qp_delta_s;
|
| 289 |
|
|
end
|
| 290 |
|
|
`adaptive_ref_pic_marking_mode_flag_s:
|
| 291 |
|
|
begin
|
| 292 |
|
|
dec_ref_pic_marking_state <= `rst_dec_ref_pic_marking;
|
| 293 |
|
|
slice_header_state <= `slice_qp_delta_s;
|
| 294 |
|
|
end
|
| 295 |
|
|
endcase
|
| 296 |
|
|
`slice_qp_delta_s:
|
| 297 |
|
|
slice_header_state <= (deblocking_filter_control_present_flag == 1'b1)? `disable_deblocking_filter_idc_s:`rst_slice_header;
|
| 298 |
|
|
`disable_deblocking_filter_idc_s:
|
| 299 |
|
|
slice_header_state <= (disable_deblocking_filter_idc != 2'b01)? `slice_alpha_c0_offset_div2_s:`rst_slice_header;
|
| 300 |
|
|
`slice_alpha_c0_offset_div2_s:slice_header_state <= `slice_beta_offset_div2_s;
|
| 301 |
|
|
`slice_beta_offset_div2_s :slice_header_state <= `rst_slice_header;
|
| 302 |
|
|
endcase
|
| 303 |
|
|
|
| 304 |
|
|
assign slice_header_s6 = (slice_header_state == `frame_num_s)? 1'b1:1'b0;
|
| 305 |
|
|
//------------------
|
| 306 |
|
|
//slice_data_state
|
| 307 |
|
|
//------------------
|
| 308 |
|
|
reg Is_skip_run_entry; //for trigger inter pred.Originally it's a wire type which will trigger inter_pred signal too early
|
| 309 |
|
|
//than expected:cause inter_pred rise up before mv_below8x8 is set to 4'b0 for P_skip.Thus the
|
| 310 |
|
|
//preload_counter after inter_pred will sample wrong mv_below8x8/mv_below8x8_curr.
|
| 311 |
|
|
//Then it is changed to reg type to appear one cycle later @ May 15,2006
|
| 312 |
|
|
wire Is_skip_run_end; //for stop triggering inter pred
|
| 313 |
|
|
|
| 314 |
|
|
always @ (posedge clk)
|
| 315 |
|
|
if (reset_n == 1'b0)
|
| 316 |
|
|
Is_skip_run_entry <= 1'b0;
|
| 317 |
|
|
else if (slice_data_state == `mb_skip_run_s && mb_skip_run != 0)
|
| 318 |
|
|
Is_skip_run_entry <= 1'b1;
|
| 319 |
|
|
else
|
| 320 |
|
|
Is_skip_run_entry <= 1'b0;
|
| 321 |
|
|
|
| 322 |
|
|
assign Is_skip_run_end = (slice_data_state == `skip_run_duration && end_of_MB_DEC && (mb_num == 98 || count_mb_skip_run == (mb_skip_run - 1)))? 1'b1:1'b0;
|
| 323 |
|
|
|
| 324 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 325 |
|
|
if (reset_n == 0)
|
| 326 |
|
|
begin
|
| 327 |
|
|
slice_data_state <= `rst_slice_data;
|
| 328 |
|
|
mb_pred_state <= `rst_mb_pred;
|
| 329 |
|
|
sub_mb_pred_state <= `rst_sub_mb_pred;
|
| 330 |
|
|
end
|
| 331 |
|
|
else
|
| 332 |
|
|
case (slice_data_state)
|
| 333 |
|
|
`rst_slice_data :slice_data_state <= (slice_type != 3'b111)? `mb_skip_run_s:`mb_type_s;
|
| 334 |
|
|
`mb_skip_run_s :slice_data_state <= (mb_skip_run == 0)? `mb_type_s:`skip_run_duration;
|
| 335 |
|
|
`skip_run_duration:slice_data_state <= (mb_num == 98)? `rst_slice_data:(count_mb_skip_run < (mb_skip_run - 1))? `skip_run_duration:`mb_type_s;
|
| 336 |
|
|
`mb_type_s :slice_data_state <= (mb_type_general == `MB_P_8x8 || mb_type_general == `MB_P_8x8ref0)? `sub_mb_pred:`mb_pred;
|
| 337 |
|
|
`sub_mb_pred:
|
| 338 |
|
|
case (sub_mb_pred_state)
|
| 339 |
|
|
`rst_sub_mb_pred:sub_mb_pred_state <= `sub_mb_type_s;
|
| 340 |
|
|
`sub_mb_type_s :sub_mb_pred_state <= (mbPartIdx == 2'b11)? `sub_mvd_l0_s:`sub_mb_type_s;
|
| 341 |
|
|
`sub_mvd_l0_s:
|
| 342 |
|
|
if (mbPartIdx == 2'b11 && {1'b0,subMbPartIdx} == (NumSubMbPart - 1) && compIdx == 1'b1)
|
| 343 |
|
|
begin
|
| 344 |
|
|
sub_mb_pred_state <= `rst_sub_mb_pred;
|
| 345 |
|
|
slice_data_state <= `coded_block_pattern_s;
|
| 346 |
|
|
end
|
| 347 |
|
|
endcase
|
| 348 |
|
|
`mb_pred:
|
| 349 |
|
|
case (mb_pred_state)
|
| 350 |
|
|
`rst_mb_pred:
|
| 351 |
|
|
if (mb_type_general[3] == 1'b1) //Intra
|
| 352 |
|
|
mb_pred_state <= (mb_type_general == `MB_Intra4x4)? `prev_intra4x4_pred_mode_flag_s:`intra_chroma_pred_mode_s;
|
| 353 |
|
|
else
|
| 354 |
|
|
mb_pred_state <= `mvd_l0_s;
|
| 355 |
|
|
`prev_intra4x4_pred_mode_flag_s:
|
| 356 |
|
|
mb_pred_state <= (prev_intra4x4_pred_mode_flag == 1'b0)? `rem_intra4x4_pred_mode_s:
|
| 357 |
|
|
(luma4x4BlkIdx == 4'b1111)? `intra_chroma_pred_mode_s:`prev_intra4x4_pred_mode_flag_s;
|
| 358 |
|
|
`rem_intra4x4_pred_mode_s:
|
| 359 |
|
|
mb_pred_state <= (luma4x4BlkIdx == 4'b1111)? `intra_chroma_pred_mode_s:`prev_intra4x4_pred_mode_flag_s;
|
| 360 |
|
|
`intra_chroma_pred_mode_s:
|
| 361 |
|
|
begin
|
| 362 |
|
|
mb_pred_state <= `rst_mb_pred;
|
| 363 |
|
|
slice_data_state <= (mb_type_general[3:2] != 2'b10)? `coded_block_pattern_s:`mb_qp_delta_s;
|
| 364 |
|
|
end
|
| 365 |
|
|
`mvd_l0_s:
|
| 366 |
|
|
if ({1'b0,mbPartIdx} == (NumMbPart - 1) && compIdx == 1'b1)
|
| 367 |
|
|
begin
|
| 368 |
|
|
mb_pred_state <= `rst_mb_pred;
|
| 369 |
|
|
slice_data_state <= `coded_block_pattern_s;
|
| 370 |
|
|
end
|
| 371 |
|
|
endcase
|
| 372 |
|
|
`coded_block_pattern_s:slice_data_state <= (CodedBlockPatternLuma == 0 && CodedBlockPatternChroma == 0)? `residual:`mb_qp_delta_s;
|
| 373 |
|
|
`mb_qp_delta_s:
|
| 374 |
|
|
slice_data_state <= (CodedBlockPatternLuma == 0 && CodedBlockPatternChroma == 0 && mb_type_general[3:2] != 2'b10)? `mb_num_update:`residual;
|
| 375 |
|
|
`residual:slice_data_state <= `mb_num_update;
|
| 376 |
|
|
`mb_num_update:slice_data_state <= `rst_slice_data;
|
| 377 |
|
|
endcase
|
| 378 |
|
|
//---------------
|
| 379 |
|
|
//residual_state
|
| 380 |
|
|
//---------------
|
| 381 |
|
|
always @ (posedge gclk_residual or negedge reset_n)
|
| 382 |
|
|
if (reset_n == 1'b0)
|
| 383 |
|
|
residual_state <= `rst_residual;
|
| 384 |
|
|
else
|
| 385 |
|
|
case (residual_state)
|
| 386 |
|
|
`rst_residual:
|
| 387 |
|
|
if (mb_type_general[3] == 1'b1 && mb_type_general != `MB_Intra4x4)//Intra16x16
|
| 388 |
|
|
residual_state <= `Intra16x16DCLevel_s;
|
| 389 |
|
|
else
|
| 390 |
|
|
residual_state <= (CodedBlockPatternLuma == 0)? `LumaLevel_0_s:`LumaLevel_s;
|
| 391 |
|
|
`Intra16x16DCLevel_s:residual_state <= (CodedBlockPatternLuma == 0)? `Intra16x16ACLevel_0_s:`Intra16x16ACLevel_s;
|
| 392 |
|
|
`Intra16x16ACLevel_s,`Intra16x16ACLevel_0_s,`LumaLevel_s,`LumaLevel_0_s:
|
| 393 |
|
|
residual_state <= (CodedBlockPatternChroma == 0)? `ChromaACLevel_0_s:`ChromaDCLevel_Cb_s;
|
| 394 |
|
|
`ChromaDCLevel_Cb_s:residual_state <= `ChromaDCLevel_Cr_s;
|
| 395 |
|
|
`ChromaDCLevel_Cr_s:residual_state <= (CodedBlockPatternChroma == 2'b01)? `ChromaACLevel_0_s:`ChromaACLevel_Cb_s;
|
| 396 |
|
|
`ChromaACLevel_Cb_s:residual_state <= `ChromaACLevel_Cr_s;
|
| 397 |
|
|
`ChromaACLevel_Cr_s:residual_state <= `rst_residual;
|
| 398 |
|
|
`ChromaACLevel_0_s :residual_state <= `rst_residual;
|
| 399 |
|
|
endcase
|
| 400 |
|
|
//--------------------
|
| 401 |
|
|
//cavlc_decoder_state
|
| 402 |
|
|
//--------------------
|
| 403 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 404 |
|
|
if (reset_n == 1'b0)
|
| 405 |
|
|
cavlc_decoder_state <= `rst_cavlc_decoder;
|
| 406 |
|
|
else
|
| 407 |
|
|
case (cavlc_decoder_state)
|
| 408 |
|
|
`rst_cavlc_decoder :cavlc_decoder_state <= `nAnB_decoding_s;
|
| 409 |
|
|
`nAnB_decoding_s :cavlc_decoder_state <= `nC_decoding_s;
|
| 410 |
|
|
`nC_decoding_s :cavlc_decoder_state <= `NumCoeffTrailingOnes_LUT;
|
| 411 |
|
|
`NumCoeffTrailingOnes_LUT://add trigger_CAVLC to trap a special case:after all-zero CrDC2x2 CAVLC decoding.
|
| 412 |
|
|
//Without adding trigger_CAVLC here,the gclk_cavlc can not catch trigger_CAVLC
|
| 413 |
|
|
//because it rises up too early (rise up at NumCoeffTrailingOnes_LUT instead of rst_cavlc_decoder)
|
| 414 |
|
|
cavlc_decoder_state <= (TotalCoeff == 0)? ((trigger_CAVLC)? `nAnB_decoding_s:`rst_cavlc_decoder):(TrailingOnes == 0)? `LevelPrefix:`TrailingOnesSignFlag;
|
| 415 |
|
|
`TrailingOnesSignFlag:cavlc_decoder_state <= (TotalCoeff == {3'b0,TrailingOnes})?`total_zeros_LUT:`LevelPrefix;
|
| 416 |
|
|
`LevelPrefix :cavlc_decoder_state <= `LevelSuffix;
|
| 417 |
|
|
`LevelSuffix :cavlc_decoder_state <= ({1'b0,i_level} == TotalCoeff-1)? ((TotalCoeff == maxNumCoeff)?`LevelRunCombination:`total_zeros_LUT):`LevelPrefix;
|
| 418 |
|
|
`total_zeros_LUT :cavlc_decoder_state <= (TotalCoeff == 1)? `RunOfZeros:`run_before_LUT;
|
| 419 |
|
|
`run_before_LUT :cavlc_decoder_state <= `RunOfZeros;
|
| 420 |
|
|
`RunOfZeros :cavlc_decoder_state <= ({1'b0,i_run} == (TotalCoeff - 1) || {1'b0,i_run} == (TotalCoeff - 2) || zerosLeft == 0)? `LevelRunCombination:`run_before_LUT;
|
| 421 |
|
|
`LevelRunCombination :cavlc_decoder_state <= (i_TotalCoeff == 0)? `rst_cavlc_decoder:`LevelRunCombination;
|
| 422 |
|
|
endcase
|
| 423 |
|
|
assign heading_one_en = (
|
| 424 |
|
|
seq_parameter_set_state == `seq_parameter_set_id_sps_s ||
|
| 425 |
|
|
seq_parameter_set_state == `log2_max_frame_num_minus4_s ||
|
| 426 |
|
|
seq_parameter_set_state == `pic_order_cnt_type_s ||
|
| 427 |
|
|
seq_parameter_set_state == `log2_max_pic_order_cnt_lsb_minus4_s ||
|
| 428 |
|
|
seq_parameter_set_state == `num_ref_frames_s ||
|
| 429 |
|
|
seq_parameter_set_state == `pic_width_in_mbs_minus1_s ||
|
| 430 |
|
|
seq_parameter_set_state == `pic_height_in_map_units_minus1_s ||
|
| 431 |
|
|
pic_parameter_set_state == `pic_parameter_set_id_pps_s ||
|
| 432 |
|
|
pic_parameter_set_state == `seq_parameter_set_id_pps_s ||
|
| 433 |
|
|
pic_parameter_set_state == `num_slice_groups_minus1_s ||
|
| 434 |
|
|
pic_parameter_set_state == `num_ref_idx_l0_active_minus1_pps_s ||
|
| 435 |
|
|
pic_parameter_set_state == `num_ref_idx_l1_active_minus1_pps_s ||
|
| 436 |
|
|
pic_parameter_set_state == `pic_init_qp_minus26_s ||
|
| 437 |
|
|
pic_parameter_set_state == `pic_init_qs_minus26_s ||
|
| 438 |
|
|
pic_parameter_set_state == `chroma_qp_index_offset_s ||
|
| 439 |
|
|
slice_header_state == `first_mb_in_slice_s ||
|
| 440 |
|
|
slice_header_state == `slice_type_s ||
|
| 441 |
|
|
slice_header_state == `pic_parameter_set_id_slice_header_s ||
|
| 442 |
|
|
slice_header_state == `idr_pic_id_s ||
|
| 443 |
|
|
slice_header_state == `num_ref_idx_l0_active_minus1_slice_header_s ||
|
| 444 |
|
|
slice_header_state == `slice_qp_delta_s ||
|
| 445 |
|
|
slice_header_state == `disable_deblocking_filter_idc_s ||
|
| 446 |
|
|
slice_header_state == `slice_alpha_c0_offset_div2_s ||
|
| 447 |
|
|
slice_header_state == `slice_beta_offset_div2_s ||
|
| 448 |
|
|
slice_data_state == `mb_skip_run_s ||
|
| 449 |
|
|
slice_data_state == `mb_type_s ||
|
| 450 |
|
|
slice_data_state == `coded_block_pattern_s ||
|
| 451 |
|
|
slice_data_state == `mb_qp_delta_s ||
|
| 452 |
|
|
mb_pred_state == `intra_chroma_pred_mode_s ||
|
| 453 |
|
|
mb_pred_state == `mvd_l0_s ||
|
| 454 |
|
|
sub_mb_pred_state == `sub_mb_type_s ||
|
| 455 |
|
|
sub_mb_pred_state == `sub_mvd_l0_s ||
|
| 456 |
|
|
cavlc_decoder_state == `NumCoeffTrailingOnes_LUT ||
|
| 457 |
|
|
cavlc_decoder_state == `LevelPrefix ||
|
| 458 |
|
|
cavlc_decoder_state == `total_zeros_LUT)? 1'b0:1'b1;
|
| 459 |
|
|
|
| 460 |
|
|
//count_mb_skip_run
|
| 461 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 462 |
|
|
if (reset_n == 1'b0)
|
| 463 |
|
|
count_mb_skip_run <= 1'b0;
|
| 464 |
|
|
else if (slice_data_state == `skip_run_duration)
|
| 465 |
|
|
count_mb_skip_run <= (mb_num == 98)? 0:(count_mb_skip_run < (mb_skip_run - 1))? (count_mb_skip_run + 1):0;
|
| 466 |
|
|
|
| 467 |
|
|
assign NextMB_IsSkip = (slice_data_state == `skip_run_duration && (count_mb_skip_run < (mb_skip_run - 1)))? 1'b1:1'b0;
|
| 468 |
|
|
|
| 469 |
|
|
reg LowerMB_IsSkip;
|
| 470 |
|
|
always @ (slice_data_state or mb_skip_run or count_mb_skip_run)
|
| 471 |
|
|
if (slice_data_state == `skip_run_duration)
|
| 472 |
|
|
begin
|
| 473 |
|
|
if (mb_skip_run < 13)
|
| 474 |
|
|
LowerMB_IsSkip <= 1'b0;
|
| 475 |
|
|
else
|
| 476 |
|
|
LowerMB_IsSkip <= (count_mb_skip_run < (mb_skip_run - 12))? 1'b1:1'b0;
|
| 477 |
|
|
end
|
| 478 |
|
|
else
|
| 479 |
|
|
LowerMB_IsSkip <= 1'b0;
|
| 480 |
|
|
|
| 481 |
|
|
//mb_num_h
|
| 482 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 483 |
|
|
if (reset_n == 1'b0)
|
| 484 |
|
|
mb_num_h <= 0;
|
| 485 |
|
|
else if (slice_data_state == `skip_run_duration || slice_data_state == `mb_num_update)
|
| 486 |
|
|
mb_num_h <= (mb_num_h == 10) ? 0:(mb_num_h + 1);
|
| 487 |
|
|
|
| 488 |
|
|
//mb_num_v
|
| 489 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 490 |
|
|
if (reset_n == 1'b0)
|
| 491 |
|
|
mb_num_v <= 0;
|
| 492 |
|
|
else if ((slice_data_state == `skip_run_duration || slice_data_state == `mb_num_update) && mb_num_h == 10)
|
| 493 |
|
|
mb_num_v <= (mb_num_v == 8) ? 0:(mb_num_v + 1);
|
| 494 |
|
|
|
| 495 |
|
|
//mb_num
|
| 496 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 497 |
|
|
if (reset_n == 1'b0)
|
| 498 |
|
|
mb_num <= 0;
|
| 499 |
|
|
else if (slice_data_state == `skip_run_duration || slice_data_state == `mb_num_update)
|
| 500 |
|
|
mb_num <= (mb_num == 98)? 0:(mb_num + 1);
|
| 501 |
|
|
|
| 502 |
|
|
//pic_num
|
| 503 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 504 |
|
|
if (reset_n == 1'b0)
|
| 505 |
|
|
pic_num <= 0;
|
| 506 |
|
|
else if ((slice_data_state == `skip_run_duration || slice_data_state == `mb_num_update) && mb_num == 98)
|
| 507 |
|
|
pic_num <= pic_num + 1;
|
| 508 |
|
|
|
| 509 |
|
|
//luma4x4BlkIdx
|
| 510 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 511 |
|
|
if (reset_n == 1'b0)
|
| 512 |
|
|
luma4x4BlkIdx <= 0;
|
| 513 |
|
|
else
|
| 514 |
|
|
case (mb_pred_state)
|
| 515 |
|
|
`prev_intra4x4_pred_mode_flag_s:
|
| 516 |
|
|
if (prev_intra4x4_pred_mode_flag == 1'b1)
|
| 517 |
|
|
luma4x4BlkIdx <= (luma4x4BlkIdx == 4'b1111)? 0:(luma4x4BlkIdx + 1);
|
| 518 |
|
|
`rem_intra4x4_pred_mode_s:luma4x4BlkIdx <= (luma4x4BlkIdx == 4'b1111)? 0:(luma4x4BlkIdx + 1);
|
| 519 |
|
|
endcase
|
| 520 |
|
|
|
| 521 |
|
|
//mbPartIdx
|
| 522 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 523 |
|
|
if (reset_n == 1'b0)
|
| 524 |
|
|
mbPartIdx <= 0;
|
| 525 |
|
|
else if (mb_pred_state == `mvd_l0_s && compIdx == 1'b1)
|
| 526 |
|
|
mbPartIdx <= ({1'b0,mbPartIdx} < (NumMbPart-1))? (mbPartIdx + 1):0;
|
| 527 |
|
|
else if (sub_mb_pred_state == `sub_mb_type_s)
|
| 528 |
|
|
mbPartIdx <= (mbPartIdx == 2'b11)? 0:(mbPartIdx + 1);
|
| 529 |
|
|
else if (sub_mb_pred_state == `sub_mvd_l0_s && {1'b0,subMbPartIdx} == NumSubMbPart - 1 && compIdx == 1'b1)
|
| 530 |
|
|
mbPartIdx <= (mbPartIdx == 2'b11)? 0:(mbPartIdx + 1);
|
| 531 |
|
|
|
| 532 |
|
|
//subMbPartIdx
|
| 533 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 534 |
|
|
if (reset_n == 1'b0)
|
| 535 |
|
|
subMbPartIdx <= 0;
|
| 536 |
|
|
else if (sub_mb_pred_state == `sub_mvd_l0_s && compIdx == 1'b1)
|
| 537 |
|
|
subMbPartIdx <= ({1'b0,subMbPartIdx} < NumSubMbPart-1)? (subMbPartIdx + 1):0;
|
| 538 |
|
|
|
| 539 |
|
|
//compIdx
|
| 540 |
|
|
always @ (posedge gclk_slice_data or negedge reset_n)
|
| 541 |
|
|
if (reset_n == 1'b0)
|
| 542 |
|
|
compIdx <= 0;
|
| 543 |
|
|
else if (mb_pred_state == `mvd_l0_s || sub_mb_pred_state == `sub_mvd_l0_s)
|
| 544 |
|
|
compIdx <= ~ compIdx;
|
| 545 |
|
|
|
| 546 |
|
|
//i8x8
|
| 547 |
|
|
always @ (posedge clk)
|
| 548 |
|
|
if (reset_n == 1'b0)
|
| 549 |
|
|
i8x8 <= 0;
|
| 550 |
|
|
else if (slice_data_state == `residual && residual_state == `rst_residual && mb_type_general != `MB_Intra16x16_CBPChroma0 && mb_type_general != `MB_Intra16x16_CBPChroma1 && mb_type_general != `MB_Intra16x16_CBPChroma2)
|
| 551 |
|
|
i8x8 <= 0;
|
| 552 |
|
|
else if ((residual_state == `Intra16x16ACLevel_s || residual_state == `LumaLevel_s) && end_of_one_blk4x4_sum == 1 && i4x4 == 2'b11)
|
| 553 |
|
|
i8x8 <= (i8x8 == 2'b11)? 0:(i8x8 + 1);
|
| 554 |
|
|
|
| 555 |
|
|
//i4x4
|
| 556 |
|
|
always @ (posedge clk)
|
| 557 |
|
|
if (reset_n == 1'b0)
|
| 558 |
|
|
i4x4 <= 0;
|
| 559 |
|
|
else if ((residual_state == `Intra16x16ACLevel_s || residual_state == `LumaLevel_s) && end_of_one_blk4x4_sum == 1)
|
| 560 |
|
|
i4x4 <= (i4x4 == 2'b11)? 0:(i4x4 + 1);
|
| 561 |
|
|
|
| 562 |
|
|
//i4x4_CbCr
|
| 563 |
|
|
always @ (posedge clk)
|
| 564 |
|
|
if (reset_n == 1'b0)
|
| 565 |
|
|
i4x4_CbCr <= 0;
|
| 566 |
|
|
else if ((residual_state == `ChromaACLevel_Cb_s || residual_state == `ChromaACLevel_Cr_s) && end_of_one_blk4x4_sum == 1'b1)
|
| 567 |
|
|
i4x4_CbCr <= (i4x4_CbCr == 2'b11)? 0:(i4x4_CbCr + 1);
|
| 568 |
|
|
|
| 569 |
|
|
//suffix_length_initialized
|
| 570 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 571 |
|
|
if (reset_n == 1'b0)
|
| 572 |
|
|
suffix_length_initialized <= 1'b0;
|
| 573 |
|
|
else if (cavlc_decoder_state == `rst_cavlc_decoder)
|
| 574 |
|
|
suffix_length_initialized <= 1'b0;
|
| 575 |
|
|
else if (cavlc_decoder_state == `LevelPrefix)
|
| 576 |
|
|
suffix_length_initialized <= 1'b1;
|
| 577 |
|
|
|
| 578 |
|
|
//i_level
|
| 579 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 580 |
|
|
if (reset_n == 1'b0)
|
| 581 |
|
|
i_level <= 0;
|
| 582 |
|
|
else if (cavlc_decoder_state == `NumCoeffTrailingOnes_LUT)
|
| 583 |
|
|
i_level <= 0;
|
| 584 |
|
|
else if (cavlc_decoder_state == `TrailingOnesSignFlag)
|
| 585 |
|
|
i_level <= i_level + TrailingOnes;
|
| 586 |
|
|
else if (cavlc_decoder_state == `LevelSuffix && {1'b0,i_level} != (TotalCoeff-1))
|
| 587 |
|
|
i_level <= i_level + 1;
|
| 588 |
|
|
|
| 589 |
|
|
//i_run
|
| 590 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 591 |
|
|
if (reset_n == 1'b0)
|
| 592 |
|
|
i_run <= 0;
|
| 593 |
|
|
else if (cavlc_decoder_state == `total_zeros_LUT)
|
| 594 |
|
|
i_run <= 0;
|
| 595 |
|
|
else if (cavlc_decoder_state == `RunOfZeros && {1'b0,i_run} != (TotalCoeff - 1) && {1'b0,i_run} != (TotalCoeff - 2) && zerosLeft != 0)
|
| 596 |
|
|
i_run <= i_run + 1;
|
| 597 |
|
|
|
| 598 |
|
|
//i_TotalCoeff
|
| 599 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 600 |
|
|
if (reset_n == 1'b0)
|
| 601 |
|
|
i_TotalCoeff <= 0;
|
| 602 |
|
|
//enter from LevelSuffix
|
| 603 |
|
|
else if (cavlc_decoder_state == `LevelSuffix && {1'b0,i_level} == (TotalCoeff-1) && TotalCoeff == maxNumCoeff)
|
| 604 |
|
|
i_TotalCoeff <= TotalCoeff - 1;
|
| 605 |
|
|
//enter from RunOfZeros
|
| 606 |
|
|
else if (cavlc_decoder_state == `RunOfZeros && ({1'b0,i_run} == (TotalCoeff - 1) || {1'b0,i_run} == (TotalCoeff - 2) || zerosLeft == 0))
|
| 607 |
|
|
i_TotalCoeff <= TotalCoeff - 1;
|
| 608 |
|
|
//Inside LevelRunCombination loop
|
| 609 |
|
|
else if (cavlc_decoder_state == `LevelRunCombination && i_TotalCoeff != 0)
|
| 610 |
|
|
i_TotalCoeff <= i_TotalCoeff-1;
|
| 611 |
|
|
|
| 612 |
|
|
//coeffNum
|
| 613 |
|
|
always @ (cavlc_decoder_state or run or coeffNum_reg)
|
| 614 |
|
|
if (cavlc_decoder_state == `nAnB_decoding_s)
|
| 615 |
|
|
coeffNum <= 4'b1111;
|
| 616 |
|
|
else if (cavlc_decoder_state == `LevelRunCombination)
|
| 617 |
|
|
coeffNum <= coeffNum_reg + run + 1;
|
| 618 |
|
|
else
|
| 619 |
|
|
coeffNum <= coeffNum_reg;
|
| 620 |
|
|
|
| 621 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 622 |
|
|
if (reset_n == 1'b0)
|
| 623 |
|
|
coeffNum_reg <= 0;
|
| 624 |
|
|
else
|
| 625 |
|
|
coeffNum_reg <= coeffNum;
|
| 626 |
|
|
|
| 627 |
|
|
//IsRunLoop
|
| 628 |
|
|
always @ (posedge gclk_cavlc or negedge reset_n)
|
| 629 |
|
|
if (reset_n == 1'b0)
|
| 630 |
|
|
IsRunLoop <= 0;
|
| 631 |
|
|
else if (cavlc_decoder_state == `RunOfZeros)
|
| 632 |
|
|
IsRunLoop <= ({1'b0,i_run} == TotalCoeff - 1 || {1'b0,i_run} == TotalCoeff - 2 || zerosLeft == 0)? 1'b0:1'b1;
|
| 633 |
|
|
|
| 634 |
|
|
endmodule
|
| 635 |
|
|
|
| 636 |
|
|
|
| 637 |
|
|
|
| 638 |
|
|
|
| 639 |
|
|
|
