mirror of
https://github.com/eried/portapack-mayhem.git
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109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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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_NFM_AUDIO_H__
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#define __PROC_NFM_AUDIO_H__
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#include "baseband_processor.hpp"
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#include "baseband_thread.hpp"
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#include "rssi_thread.hpp"
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#include "dsp_decimate.hpp"
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#include "dsp_demodulate.hpp"
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#include "dsp_iir.hpp"
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#include "audio_output.hpp"
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#include "spectrum_collector.hpp"
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#include <cstdint>
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#define Z_MIN_FILTER_COUNT 224
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#define Z_MIN_ZERO_CROSSINGS 20
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class NarrowbandFMAudio : public BasebandProcessor {
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public:
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void execute(const buffer_c8_t& buffer) override;
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void on_message(const Message* const message) override;
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private:
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static constexpr size_t baseband_fs = 3072000;
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std::array<complex16_t, 512> dst{};
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const buffer_c16_t dst_buffer{
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dst.data(),
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dst.size()};
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const buffer_s16_t work_audio_buffer{
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(int16_t*)dst.data(),
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sizeof(dst) / sizeof(int16_t)};
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std::array<int16_t, 16> audio{};
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const buffer_s16_t audio_buffer{
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(int16_t*)audio.data(),
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sizeof(audio) / sizeof(int16_t)};
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std::array<int16_t, 16> tone{};
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const buffer_s16_t tone_buffer{
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(int16_t*)tone.data(),
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sizeof(tone) / sizeof(int16_t)};
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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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int32_t channel_filter_low_f = 0;
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int32_t channel_filter_high_f = 0;
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int32_t channel_filter_transition = 0;
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// For CTCSS decoding
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dsp::decimate::FIR64AndDecimateBy2Real ctcss_filter{};
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IIRBiquadFilter hpf{};
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dsp::demodulate::FM demod{};
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AudioOutput audio_output{};
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SpectrumCollector channel_spectrum{};
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uint32_t tone_phase{0};
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uint32_t tone_delta{0};
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bool pitch_rssi_enabled{false};
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float cur_sample{}, prev_sample{};
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uint32_t z_acc{0}, z_timer{0}, z_count{0}, z_filter_count{0};
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bool ctcss_detect_enabled{true};
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static constexpr float k = 32768.0f;
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static constexpr float ki = 1.0f / k;
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bool configured{false};
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// RequestSignalMessage sig_message { RequestSignalMessage::Signal::Squelched };
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CodedSquelchMessage ctcss_message{0};
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/* NB: Threads should be the last members in the class definition. */
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BasebandThread baseband_thread{baseband_fs, this, baseband::Direction::Receive};
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RSSIThread rssi_thread{};
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void pitch_rssi_config(const PitchRSSIConfigureMessage& message);
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void configure(const NBFMConfigureMessage& message);
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void capture_config(const CaptureConfigMessage& message);
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};
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#endif /*__PROC_NFM_AUDIO_H__*/
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