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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-units
* Created on: 27 нояб. 2018 г.
*
* lsp-dsp-units is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-dsp-units is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-dsp-units. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_DSP_UNITS_CTL_COUNTER_H_
#define LSP_PLUG_IN_DSP_UNITS_CTL_COUNTER_H_
#include <lsp-plug.in/dsp-units/version.h>
#include <lsp-plug.in/dsp-units/iface/IStateDumper.h>
namespace lsp
{
namespace dspu
{
class LSP_DSP_UNITS_PUBLIC Counter
{
private:
Counter & operator = (const Counter &);
Counter(const Counter &);
protected:
enum flags_t
{
F_INITIAL = 1 << 0,
F_FIRED = 1 << 1
};
protected:
size_t nCurrent;
size_t nInitial;
size_t nSampleRate;
float fFrequency;
size_t nFlags;
public:
explicit Counter();
~Counter();
/**
* Construct object
*/
void construct();
/**
* Destroy object
*/
void destroy();
public:
/**
* Get sample rate
* @return sample rate
*/
inline size_t get_sample_rate() const { return nSampleRate; }
/**
* Set sample rate
* @param sr sample rate
* @param reset flag to reset counter to initial value
*/
void set_sample_rate(size_t sr, bool reset = true);
/**
* Get frequency
* @return frequency
*/
inline float get_frequency() const { return fFrequency; }
/**
* Set frequency
* @param freq frequency
* @param reset flag to reset counter to initial value
*/
void set_frequency(float freq, bool reset = true);
/**
* Get initial countdown value
* @return initial countdown value
*/
inline size_t get_initial_value() const { return nInitial; }
/**
* Set initial countdown value
* @param value initial countdown value
* @param reset flag to reset counter to initial value
*/
void set_initial_value(size_t value, bool reset = true);
public:
/**
* Check fired flag
* @return fired flag
*/
inline bool fired() const { return nFlags & F_FIRED; }
/**
* Get number of samples pending for processing
* @return number of samples pending for processing
*/
size_t pending() const { return nCurrent; }
/**
* Reset fired flag
* @return fired flag before reset
*/
bool commit();
/**
* Reset counter to initial value
* @return fired flag
*/
bool reset();
/**
* Submit number of samples been processed
* @param samples number of samples to submit
* @return fired flag
*/
bool submit(size_t samples);
/**
* Prefer frequency over initial value when
* changing sample rate
*/
inline void preserve_frequency() {
nFlags &= ~F_INITIAL;
}
/**
* Prefer initial value over frequency when
* changing sample rate
*/
inline void preserve_initial_value() {
nFlags |= F_INITIAL;
}
/**
* Dump the state
* @param dumper dumper
*/
void dump(IStateDumper *v) const;
};
} /* namespace dspu */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_DSP_UNITS_CTL_COUNTER_H_ */
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