mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/*
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* Copyright (C) 2014 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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#include "proc_nfm_audio.hpp"
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#include "audio_output.hpp"
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#include "event_m4.hpp"
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#include <cstdint>
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#include <cstddef>
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void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
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if( !configured ) {
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return;
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}
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const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
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const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
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const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
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feed_channel_stats(channel_out);
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channel_spectrum.feed(channel_out, channel_filter_pass_f, channel_filter_stop_f);
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if ( !pwmrssi_enabled ) {
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auto audio = demod.execute(channel_out, audio_buffer);
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audio_output.write(audio);
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} else {
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for (c = 0; c < 32; c++) {
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if (synth_acc < pwmrssi_avg)
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pwmrssi_audio_buffer.p[c] = 32767;
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else
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pwmrssi_audio_buffer.p[c] = -32768;
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if (synth_acc < 30) // 24kHz / 30 = 800Hz (TODO: use pwmrssi_freq !)
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synth_acc++;
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else
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synth_acc = 0;
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}
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audio_output.write(pwmrssi_audio_buffer);
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}
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}
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void NarrowbandFMAudio::on_message(const Message* const message) {
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switch(message->id) {
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case Message::ID::UpdateSpectrum:
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case Message::ID::SpectrumStreamingConfig:
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channel_spectrum.on_message(message);
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break;
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case Message::ID::NBFMConfigure:
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configure(*reinterpret_cast<const NBFMConfigureMessage*>(message));
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break;
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case Message::ID::CaptureConfig:
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capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
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break;
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case Message::ID::PWMRSSIConfigure:
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pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
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break;
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default:
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break;
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}
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}
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void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
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constexpr size_t decim_0_input_fs = baseband_fs;
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constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
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constexpr size_t decim_1_input_fs = decim_0_output_fs;
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constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
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constexpr size_t channel_filter_input_fs = decim_1_output_fs;
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const size_t channel_filter_output_fs = channel_filter_input_fs / message.channel_decimation;
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const size_t demod_input_fs = channel_filter_output_fs;
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decim_0.configure(message.decim_0_filter.taps, 33554432);
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decim_1.configure(message.decim_1_filter.taps, 131072);
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channel_filter.configure(message.channel_filter.taps, message.channel_decimation);
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demod.configure(demod_input_fs, message.deviation);
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channel_filter_pass_f = message.channel_filter.pass_frequency_normalized * channel_filter_input_fs;
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channel_filter_stop_f = message.channel_filter.stop_frequency_normalized * channel_filter_input_fs;
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channel_spectrum.set_decimation_factor(std::floor(channel_filter_output_fs / (channel_filter_pass_f + channel_filter_stop_f)));
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audio_output.configure(message.audio_hpf_config, message.audio_deemph_config); // , 0.8f
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synth_acc = 0;
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configured = true;
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}
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void NarrowbandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
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pwmrssi_enabled = message.enabled;
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pwmrssi_freq = message.freq;
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pwmrssi_avg = message.avg / 3;
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}
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void NarrowbandFMAudio::capture_config(const CaptureConfigMessage& message) {
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if( message.config ) {
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audio_output.set_stream(std::make_unique<StreamInput>(message.config));
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} else {
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audio_output.set_stream(nullptr);
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}
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<NarrowbandFMAudio>() };
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event_dispatcher.run();
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return 0;
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}
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