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/* -*- c++ -*- */
/*
* Copyright 2013,2018 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef FASTNOISE_SOURCE_H
#define FASTNOISE_SOURCE_H
#include <gnuradio/analog/api.h>
#include <gnuradio/analog/noise_type.h>
#include <gnuradio/sync_block.h>
#include <vector>
#include <cstdint>
namespace gr {
namespace analog {
/*!
* \brief Random number source
* \ingroup source_blk
*
* \details
* Generate random values from different distributions.
* Currently, only Gaussian and uniform are enabled.
*/
template <class T>
class ANALOG_API fastnoise_source : virtual public sync_block
{
public:
// gr::analog::fastnoise_source::sptr
typedef boost::shared_ptr<fastnoise_source<T>> sptr;
/*! \brief Make a fast noise source
* \param type the random distribution to use (see
* gnuradio/analog/noise_type.h)
* \param ampl the standard deviation of a 1-d noise process. If
* this is the complex source, this parameter is split
* among the real and imaginary parts:
* <pre>(ampl/sqrt(2))x + j(ampl/sqrt(2))y</pre>
* \param seed seed for random generators. Note that for uniform
* and Gaussian distributions, this should be a negative
* number.
* \param samples Number of samples to pre-generate
*/
static sptr
make(noise_type_t type, float ampl, long seed = 0, long samples = 1024 * 16);
virtual T sample() = 0;
virtual T sample_unbiased() = 0;
virtual const std::vector<T>& samples() const = 0;
/*!
* Set the noise type. Nominally from the
* gr::analog::noise_type_t selections, but only GR_GAUSSIAN and
* GR_UNIFORM are currently available.
*/
virtual void set_type(noise_type_t type) = 0;
/*!
* Set the standard deviation (amplitude) of the 1-d noise
* process.
*/
virtual void set_amplitude(float ampl) = 0;
virtual noise_type_t type() const = 0;
virtual float amplitude() const = 0;
};
typedef fastnoise_source<float> fastnoise_source_f;
typedef fastnoise_source<std::int32_t> fastnoise_source_i;
typedef fastnoise_source<std::int16_t> fastnoise_source_s;
typedef fastnoise_source<gr_complex> fastnoise_source_c;
} /* namespace analog */
} /* namespace gr */
#endif /* FASTNOISE_SOURCE_H */
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