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61 lines
1.1 KiB
C++
61 lines
1.1 KiB
C++
//
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// Stepper.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 12/01/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Stepper_hpp
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#define Stepper_hpp
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#include <stdint.h>
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namespace SignalProcessing {
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class Stepper
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{
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public:
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Stepper() : Stepper(1,1) {}
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Stepper(uint64_t output_rate, uint64_t input_rate) :
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accumulated_error_(0),
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input_rate_(input_rate),
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output_rate_(output_rate),
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whole_step_(output_rate / input_rate),
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adjustment_up_((int64_t)(output_rate % input_rate) << 1),
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adjustment_down_((int64_t)input_rate << 1) {}
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inline uint64_t step()
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{
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uint64_t update = whole_step_;
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accumulated_error_ += adjustment_up_;
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if(accumulated_error_ > 0)
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{
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update++;
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accumulated_error_ -= adjustment_down_;
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}
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return update;
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}
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inline uint64_t get_output_rate()
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{
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return output_rate_;
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}
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inline uint64_t get_input_rate()
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{
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return input_rate_;
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}
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private:
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uint64_t whole_step_;
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int64_t adjustment_up_, adjustment_down_;
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int64_t accumulated_error_;
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uint64_t input_rate_, output_rate_;
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};
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}
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#endif /* Stepper_hpp */
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