GNURadio block for spectrum visualization using GPU https://osmocom.org/projects/sdr/wiki/Fosphor
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gr-fosphor/include/gnuradio/fosphor/glfw_sink_c.h

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/* -*- c++ -*- */
/*
* Copyright 2013-2021 Sylvain Munaut <tnt@246tNt.com>
*
* This file is part of gr-fosphor
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#pragma once
#include <gnuradio/fosphor/api.h>
#include <gnuradio/fosphor/base_sink_c.h>
#include <gnuradio/sync_block.h>
namespace gr {
namespace fosphor {
/*!
* \brief GLFW version of fosphor sink
* \ingroup fosphor
*/
class GR_FOSPHOR_API glfw_sink_c : virtual public base_sink_c
{
public:
typedef std::shared_ptr<glfw_sink_c> sptr;
/*!
* \brief Return a shared_ptr to a new instance of fosphor::glfw_sink_c.
*
* To avoid accidental use of raw pointers, fosphor::glfw_sink_c's
* constructor is in a private implementation
* class. fosphor::glfw_sink_c::make is the public interface for
* creating new instances.
*/
static sptr make();
};
} // namespace fosphor
} // namespace gr