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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: 15 дек. 2020 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_UTIL_DYNAMICDELAY_H_
#define LSP_PLUG_IN_DSP_UNITS_UTIL_DYNAMICDELAY_H_
#include <lsp-plug.in/dsp-units/version.h>
#include <lsp-plug.in/dsp-units/iface/IStateDumper.h>
#include <lsp-plug.in/common/status.h>
namespace lsp
{
namespace dspu
{
/**
* Dynamic Delay: Delay with varying in time delay, gain and feedback gain
*/
class LSP_DSP_UNITS_PUBLIC DynamicDelay
{
private:
DynamicDelay & operator = (const DynamicDelay &);
DynamicDelay(const DynamicDelay &);
protected:
float *vDelay;
size_t nHead;
size_t nCapacity;
ssize_t nMaxDelay;
uint8_t *pData;
public:
explicit DynamicDelay();
~DynamicDelay();
void construct();
void destroy();
public:
/**
* Obtain the maximum possible value for the delay
* @return the maximum possible value for the delay in samples
*/
inline size_t max_delay() const { return nMaxDelay; }
/**
* Obtain the overall delay capacity
* @return the overall delay capacity in samples
*/
inline size_t capacity() const { return nCapacity; }
/**
* Initialize delay
* @param max_size maximum delay size
* @return status of operation
*/
status_t init(size_t max_size);
/**
* Process the signal using dynamic settings of delay and feedback
* @param out output buffer
* @param in input buffer
* @param delay the delay values
* @param fback feedback gain values
* @param fdelay feedback delay values
* @param samples number of samples to process
*/
void process(float *out, const float *in,
const float *delay, const float *fgain, const float *fdelay,
size_t samples);
/**
* Clear delay state
*/
void clear();
/**
* Copy the contents of the dynamic delay
* @param s delay to copy contents from
*/
void copy(DynamicDelay *s);
/**
* Swap contents with some another delay
* @param d delay to swap contents
*/
void swap(DynamicDelay *d);
/**
* Dump internal state
* @param v state dumper
*/
void dump(IStateDumper *v) const;
};
}
}
#endif /* LSP_PLUG_IN_DSP_UNITS_UTIL_DYNAMICDELAY_H_ */
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