mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
132 lines
4.1 KiB
C++
132 lines
4.1 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2016 Furrtek
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "proc_nfm_audio.hpp"
|
|
|
|
#include "event_m4.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
|
|
void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
|
|
if( !configured ) {
|
|
return;
|
|
}
|
|
|
|
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
|
|
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
|
|
const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
|
|
|
|
feed_channel_stats(channel_out);
|
|
channel_spectrum.feed(channel_out, channel_filter_pass_f, channel_filter_stop_f);
|
|
|
|
if ( !pwmrssi_enabled ) {
|
|
auto audio = demod.execute(channel_out, audio_buffer);
|
|
audio_output.write(audio);
|
|
} else {
|
|
for (c = 0; c < 32; c++) {
|
|
if (synth_acc < pwmrssi_avg)
|
|
pwmrssi_audio_buffer.p[c] = 32767;
|
|
else
|
|
pwmrssi_audio_buffer.p[c] = -32768;
|
|
|
|
if (synth_acc < synth_div) // 24kHz / 30 = 800Hz
|
|
synth_acc++;
|
|
else
|
|
synth_acc = 0;
|
|
}
|
|
|
|
audio_output.write(pwmrssi_audio_buffer);
|
|
}
|
|
}
|
|
|
|
void NarrowbandFMAudio::on_message(const Message* const message) {
|
|
switch(message->id) {
|
|
case Message::ID::UpdateSpectrum:
|
|
case Message::ID::SpectrumStreamingConfig:
|
|
channel_spectrum.on_message(message);
|
|
break;
|
|
|
|
case Message::ID::NBFMConfigure:
|
|
configure(*reinterpret_cast<const NBFMConfigureMessage*>(message));
|
|
break;
|
|
|
|
case Message::ID::CaptureConfig:
|
|
capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
|
|
break;
|
|
|
|
case Message::ID::PWMRSSIConfigure:
|
|
pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
|
|
constexpr size_t decim_0_input_fs = baseband_fs;
|
|
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
|
|
|
|
constexpr size_t decim_1_input_fs = decim_0_output_fs;
|
|
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
|
|
|
|
constexpr size_t channel_filter_input_fs = decim_1_output_fs;
|
|
const size_t channel_filter_output_fs = channel_filter_input_fs / message.channel_decimation;
|
|
|
|
const size_t demod_input_fs = channel_filter_output_fs;
|
|
|
|
decim_0.configure(message.decim_0_filter.taps, 33554432);
|
|
decim_1.configure(message.decim_1_filter.taps, 131072);
|
|
channel_filter.configure(message.channel_filter.taps, message.channel_decimation);
|
|
demod.configure(demod_input_fs, message.deviation);
|
|
channel_filter_pass_f = message.channel_filter.pass_frequency_normalized * channel_filter_input_fs;
|
|
channel_filter_stop_f = message.channel_filter.stop_frequency_normalized * channel_filter_input_fs;
|
|
channel_spectrum.set_decimation_factor(std::floor(channel_filter_output_fs / (channel_filter_pass_f + channel_filter_stop_f)));
|
|
audio_output.configure(message.audio_hpf_config, message.audio_deemph_config); // , 0.8f
|
|
|
|
synth_acc = 0;
|
|
|
|
configured = true;
|
|
}
|
|
|
|
void NarrowbandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
|
|
pwmrssi_enabled = message.enabled;
|
|
pwmrssi_avg = message.avg / 3;
|
|
synth_div = message.synth_div;
|
|
synth_acc = 0;
|
|
}
|
|
|
|
void NarrowbandFMAudio::capture_config(const CaptureConfigMessage& message) {
|
|
if( message.config ) {
|
|
audio_output.set_stream(std::make_unique<StreamInput>(message.config));
|
|
} else {
|
|
audio_output.set_stream(nullptr);
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
EventDispatcher event_dispatcher { std::make_unique<NarrowbandFMAudio>() };
|
|
event_dispatcher.run();
|
|
return 0;
|
|
}
|