//--------------------------------------------------------------------------------------------------
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//--------------------------------------------------------------------------------------------------
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// Design : nova
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// Design : nova
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// Author(s) : Ke Xu
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// Author(s) : Ke Xu
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// Email : eexuke@yahoo.com
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// Email : eexuke@yahoo.com
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// File : dependent_variable_decoding.v
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// File : dependent_variable_decoding.v
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// Generated : June 6,2005
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// Generated : June 6,2005
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// Copyright (C) 2008 Ke Xu
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// Copyright (C) 2008 Ke Xu
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//-------------------------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------------------------
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// Description
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// Description
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// for u(v) decoding as frame_num,pic_order_cnt_lsb
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// for u(v) decoding as frame_num,pic_order_cnt_lsb
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//-------------------------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------------------------
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// synopsys translate_off
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// synopsys translate_off
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`include "timescale.v"
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`include "timescale.v"
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// synopsys translate_on
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// synopsys translate_on
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`include "nova_defines.v"
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`include "nova_defines.v"
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module dependent_variable_decoding (slice_header_state,log2_max_frame_num_minus4,
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module dependent_variable_decoding (slice_header_state,log2_max_frame_num_minus4,
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log2_max_pic_order_cnt_lsb_minus4,BitStream_buffer_output,
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log2_max_pic_order_cnt_lsb_minus4,BitStream_buffer_output,
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dependent_variable_len,dependent_variable_decoding_output);
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dependent_variable_len,dependent_variable_decoding_output);
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input [3:0] slice_header_state;
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input [3:0] slice_header_state;
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input [3:0] log2_max_frame_num_minus4;
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input [3:0] log2_max_frame_num_minus4;
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input [3:0] log2_max_pic_order_cnt_lsb_minus4;
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input [3:0] log2_max_pic_order_cnt_lsb_minus4;
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input [15:0] BitStream_buffer_output;
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input [15:0] BitStream_buffer_output;
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output [3:0] dependent_variable_len;
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output [3:0] dependent_variable_len;
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output [9:0] dependent_variable_decoding_output;
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output [9:0] dependent_variable_decoding_output;
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reg [3:0] dependent_variable_len;
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reg [3:0] dependent_variable_len;
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reg [9:0] dependent_variable_decoding_output;
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reg [9:0] dependent_variable_decoding_output;
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always @ (slice_header_state or log2_max_frame_num_minus4 or log2_max_pic_order_cnt_lsb_minus4)
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always @ (slice_header_state or log2_max_frame_num_minus4 or log2_max_pic_order_cnt_lsb_minus4)
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if (slice_header_state == `frame_num_s)
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if (slice_header_state == `frame_num_s)
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dependent_variable_len <= log2_max_frame_num_minus4 + 4;
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dependent_variable_len <= log2_max_frame_num_minus4 + 4;
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else if (slice_header_state == `pic_order_cnt_lsb_s)
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else if (slice_header_state == `pic_order_cnt_lsb_s)
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dependent_variable_len <= log2_max_pic_order_cnt_lsb_minus4 + 4;
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dependent_variable_len <= log2_max_pic_order_cnt_lsb_minus4 + 4;
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else
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else
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dependent_variable_len <= 0;
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dependent_variable_len <= 0;
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always @ (slice_header_state or dependent_variable_len or BitStream_buffer_output)
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always @ (slice_header_state or dependent_variable_len or BitStream_buffer_output)
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if (slice_header_state == `frame_num_s || slice_header_state == `pic_order_cnt_lsb_s)
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if (slice_header_state == `frame_num_s || slice_header_state == `pic_order_cnt_lsb_s)
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case (dependent_variable_len)
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case (dependent_variable_len)
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4 :dependent_variable_decoding_output <= {6'b0,BitStream_buffer_output[15:12]};
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4 :dependent_variable_decoding_output <= {6'b0,BitStream_buffer_output[15:12]};
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5 :dependent_variable_decoding_output <= {5'b0,BitStream_buffer_output[15:11]};
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5 :dependent_variable_decoding_output <= {5'b0,BitStream_buffer_output[15:11]};
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6 :dependent_variable_decoding_output <= {4'b0,BitStream_buffer_output[15:10]};
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6 :dependent_variable_decoding_output <= {4'b0,BitStream_buffer_output[15:10]};
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7 :dependent_variable_decoding_output <= {3'b0,BitStream_buffer_output[15:9]};
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7 :dependent_variable_decoding_output <= {3'b0,BitStream_buffer_output[15:9]};
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8 :dependent_variable_decoding_output <= {2'b0,BitStream_buffer_output[15:8]};
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8 :dependent_variable_decoding_output <= {2'b0,BitStream_buffer_output[15:8]};
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9 :dependent_variable_decoding_output <= {1'b0,BitStream_buffer_output[15:7]};
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9 :dependent_variable_decoding_output <= {1'b0,BitStream_buffer_output[15:7]};
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10:dependent_variable_decoding_output <= BitStream_buffer_output[15:6];
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10:dependent_variable_decoding_output <= BitStream_buffer_output[15:6];
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default:dependent_variable_decoding_output <= 0;
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default:dependent_variable_decoding_output <= 0;
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endcase
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endcase
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else
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else
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dependent_variable_decoding_output <= 0;
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dependent_variable_decoding_output <= 0;
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endmodule
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endmodule
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