mirror of
https://github.com/eried/portapack-mayhem.git
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31e8019642
* WIP Refactoring * WordExtractor building * Fix buffer sizes and squelch execute * Move impls to cpp file * Baud indicator * WIP new bit extractor * New approach for bit extraction. * Code fit and finish * Fix case on button * Cleanup * Adjust rate miss threshold * Fix count bits error calculation.
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __DSP_SQUELCH_H__
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#define __DSP_SQUELCH_H__
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#include "buffer.hpp"
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#include "dsp_iir.hpp"
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#include "dsp_iir_config.hpp"
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#include <cstdint>
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#include <cstddef>
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class FMSquelch {
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public:
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/* Check if noise level is lower than threshold.
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* Returns true if noise is below threshold. */
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bool execute(const buffer_f32_t& audio);
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void set_threshold(const float new_value);
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bool enabled() const;
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private:
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float threshold_squared{0.0f};
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IIRBiquadFilter non_audio_hpf{non_audio_hpf_config};
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};
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#endif /*__DSP_SQUELCH_H__*/
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