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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: 21 дек. 2016 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_DITHER_H_
#define LSP_PLUG_IN_DSP_UNITS_UTIL_DITHER_H_
#include <lsp-plug.in/dsp-units/version.h>
#include <lsp-plug.in/dsp-units/iface/IStateDumper.h>
#include <lsp-plug.in/dsp-units/util/Randomizer.h>
namespace lsp
{
namespace dspu
{
/**
* Dither class: generates dither noise with specified characteristics
*/
class LSP_DSP_UNITS_PUBLIC Dither
{
private:
Dither &operator = (const Dither &);
Dither(const Dither &);
protected:
size_t nBits;
float fGain;
float fDelta;
Randomizer sRandom;
public:
explicit Dither();
~Dither();
/**
* Create object
*/
void construct();
public:
/** Initialize dither
*
*/
inline void init() { sRandom.init(); };
/** Set number of bits per sample
*
* @param bits number of bits per sample
*/
void set_bits(size_t bits);
/** Process signal
*
* @param out output signal
* @param in input signal
* @param count number of samples to process
*/
void process(float *out, const float *in, size_t count);
/**
* Dump the state
* @param dumper dumper
*/
void dump(IStateDumper *v) const;
};
}
} /* namespace lsp */
#endif /* LSP_PLUG_IN_DSP_UNITS_UTIL_DITHER_H_ */
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