103 lines
3.2 KiB
C++
103 lines
3.2 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_WFM_AUDIO_H__
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#define __PROC_WFM_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_types.hpp"
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#include "dsp_decimate.hpp"
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#include "dsp_demodulate.hpp"
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#include "block_decimator.hpp"
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#include "audio_output.hpp"
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#include "spectrum_collector.hpp"
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class WidebandFMAudio : 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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static constexpr auto spectrum_rate_hz = 50.0f;
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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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// work_audio_buffer and dst_buffer use the same data pointer
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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<complex16_t, 64> complex_audio{};
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const buffer_c16_t complex_audio_buffer{
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complex_audio.data(),
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complex_audio.size()};
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dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0{};
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dsp::decimate::FIRC16xR16x16Decim2 decim_1{};
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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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dsp::demodulate::FM demod{};
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dsp::decimate::DecimateBy2CIC4Real audio_dec_1{};
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dsp::decimate::DecimateBy2CIC4Real audio_dec_2{};
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dsp::decimate::FIR64AndDecimateBy2Real audio_filter{};
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AudioOutput audio_output{};
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// For fs=96kHz FFT streaming
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BlockDecimator<complex16_t, 256> audio_spectrum_decimator{1};
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std::array<std::complex<float>, 256> audio_spectrum{};
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uint32_t audio_spectrum_timer{0};
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enum AudioSpectrumState {
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IDLE = 0,
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FEED,
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FFT
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};
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AudioSpectrumState audio_spectrum_state{IDLE};
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AudioSpectrum spectrum{};
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uint32_t fft_step{0};
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SpectrumCollector channel_spectrum{};
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size_t spectrum_interval_samples = 0;
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size_t spectrum_samples = 0;
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bool configured{false};
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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 configure(const WFMConfigureMessage& message);
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void capture_config(const CaptureConfigMessage& message);
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void post_message(const buffer_c16_t& data);
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};
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#endif /*__PROC_WFM_AUDIO_H__*/
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