mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2026-08-20 22:49:06 +00:00
Ryan Harden
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/*
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* Copyright (C) 2024 PortaPack Mayhem
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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 __PROC_TONEDETECT_H__
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#define __PROC_TONEDETECT_H__
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#include "baseband_processor.hpp"
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#include "baseband_thread.hpp"
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#include "message.hpp"
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#include "dsp_decimate.hpp"
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#include "dsp_demodulate.hpp"
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#include "audio_output.hpp"
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#include "dsp_fir_taps.hpp"
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#include "rssi_thread.hpp"
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#include "spectrum_collector.hpp"
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#include "dsp_squelch.hpp"
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class ToneDetectProcessor : public BasebandProcessor {
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public:
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ToneDetectProcessor() {}
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void execute(const buffer_c8_t& buffer) override;
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void on_message(const Message* const p) override;
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private:
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void configure(uint8_t squelch, uint32_t ctcss_freq_x10);
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BasebandThread baseband_thread{3072000, this, baseband::Direction::Receive};
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RSSIThread rssi_thread{};
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std::array<complex16_t, 512> dst{};
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const buffer_c16_t dst_buffer{dst.data(), dst.size()};
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std::array<float, 32> audio{};
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const buffer_f32_t audio_buffer{audio.data(), audio.size()};
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dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0{};
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dsp::decimate::FIRC16xR16x32Decim8 decim_1{};
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dsp::decimate::FIRAndDecimateComplex channel_filter{};
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dsp::demodulate::FM demod_fm{};
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AudioOutput audio_output{};
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bool configured{false};
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uint8_t user_squelch_level{0};
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FMSquelch fm_squelch{}; // user-adjustable: drives audio muting only
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FMSquelch carrier_sq{}; // fixed threshold: drives detection gate
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// Audio muting squelch state (user-adjustable level, has hold for smooth audio)
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bool squelch_is_open{false};
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uint32_t squelch_hold{0};
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// Carrier-detect gate state (fixed 0.20 threshold, separate from audio squelch)
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bool carrier_is_open{false};
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uint32_t carrier_hold{0};
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// CTCSS gate via Goertzel algorithm (per 40 ms window)
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uint32_t ctcss_freq_x10{0}; // 0 = None → fall back to FMSquelch gate
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float goertzel_coeff{0.0f}; // 2 * cos(2π * k / WINDOW_SAMPLES)
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float goertzel_s1{0.0f};
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float goertzel_s2{0.0f};
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// 40 ms measurement window
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uint32_t window_sample_count{0};
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bool was_ctcss_detected{false};
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uint32_t tone_duration_windows{0};
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// MOTO frequency bank — one Goertzel filter per MOTO table entry.
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// States reset each window; coefficients set once in configure().
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float moto_coeff[45]{};
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float moto_s1[45]{};
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float moto_s2[45]{};
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ToneDetectDataMessage data_message{};
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SpectrumCollector channel_spectrum{};
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};
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#endif /* __PROC_TONEDETECT_H__ */
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