mirror of
https://github.com/eried/portapack-mayhem.git
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135 lines
3.6 KiB
C++
135 lines
3.6 KiB
C++
/*
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* Copyright (C) 2015 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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#include "proc_mictx.hpp"
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#include "tonesets.hpp"
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#include "portapack_shared_memory.hpp"
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#include "sine_table_int8.hpp"
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#include "event_m4.hpp"
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#include <cstdint>
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void MicTXProcessor::execute(const buffer_c8_t& buffer){
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// This is called at 1536000/2048 = 750Hz
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if (!configured) return;
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audio_input.read_audio_buffer(audio_buffer);
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for (size_t i = 0; i<buffer.count; i++) {
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if (!play_beep) {
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sample = audio_buffer.p[i >> 6] >> 8; // 1536000 / 64 = 24000
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sample = (sample * (int32_t)gain_x10) / 10;
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power += (sample < 0) ? -sample : sample; // Power average for UI vu-meter
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if (!as) {
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as = divider;
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level_message.value = power / (divider / 4); // Why ?
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shared_memory.application_queue.push(level_message);
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power = 0;
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} else {
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as--;
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}
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} else {
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if (beep_timer) {
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beep_timer--;
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} else {
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beep_timer = 76800; // 50ms @ 1536000Hz
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if (beep_index == BEEP_TONES_NB) {
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configured = false;
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fm_delta = 0; // Zero-out the IQ output for the rest of the buffer
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shared_memory.application_queue.push(txdone_message);
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} else {
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beep_phase_inc = beep_deltas[beep_index];
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beep_index++;
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}
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}
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sample = sine_table_i8[(beep_phase & 0xFF000000U) >> 24];
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beep_phase += beep_phase_inc;
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}
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if (ctcss_enabled) {
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ctcss_sample = sine_table_i8[(ctcss_phase & 0xFF000000U) >> 24];
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sample_mixed = ((sample * 205) + (ctcss_sample * 50)) / 256; // ~20%
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ctcss_phase += ctcss_phase_inc;
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} else {
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sample_mixed = sample;
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}
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// FM
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if (fm_delta) {
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delta = sample_mixed * fm_delta;
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phase += delta;
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sphase = phase + (64 << 24);
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re = (sine_table_i8[(sphase & 0xFF000000U) >> 24]);
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im = (sine_table_i8[(phase & 0xFF000000U) >> 24]);
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} else {
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re = 0;
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im = 0;
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}
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buffer.p[i] = {re, im};
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}
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}
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void MicTXProcessor::on_message(const Message* const msg) {
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const AudioTXConfigMessage config_message = *reinterpret_cast<const AudioTXConfigMessage*>(msg);
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const RequestSignalMessage request_message = *reinterpret_cast<const RequestSignalMessage*>(msg);
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switch(msg->id) {
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case Message::ID::AudioTXConfig:
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fm_delta = config_message.fm_delta * (0xFFFFFFULL / 1536000);
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gain_x10 = config_message.gain_x10;
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divider = config_message.divider;
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ctcss_enabled = config_message.ctcss_enabled;
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ctcss_phase_inc = config_message.ctcss_phase_inc;
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txdone_message.done = true;
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play_beep = false;
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configured = true;
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break;
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case Message::ID::RequestSignal:
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if (request_message.signal == RequestSignalMessage::Signal::BeepRequest) {
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beep_index = 0;
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beep_timer = 0;
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play_beep = true;
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}
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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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int main() {
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EventDispatcher event_dispatcher { std::make_unique<MicTXProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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