110 lines
3.1 KiB
C++
110 lines
3.1 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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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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BasebandThread baseband_thread { baseband_fs, this, NORMALPRIO + 20, baseband::Direction::Receive };
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RSSIThread rssi_thread { NORMALPRIO + 10 };
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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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};
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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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};
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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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};
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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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};
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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 };
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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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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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//RequestSignalMessage sig_message { RequestSignalMessage::Signal::Squelched };
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CodedSquelchMessage ctcss_message { 0 };
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};
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#endif/*__PROC_NFM_AUDIO_H__*/
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