mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
107 lines
2.8 KiB
C++
107 lines
2.8 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_audiotx.hpp"
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#include "portapack_shared_memory.hpp"
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#include "sine_table_int8.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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void AudioTXProcessor::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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for (size_t i = 0; i<buffer.count; i++) {
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// Audio preview sample generation @ 1536000/divider
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if (!as) {
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as = divider;
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audio_fifo.out(out_sample);
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sample = (int32_t)out_sample;
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//preview_audio_buffer.p[ai++] = sample << 8;
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if ((audio_fifo.len() < 512) && (asked == false)) {
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// Ask application to fill up fifo
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shared_memory.application_queue.push(sig_message);
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asked = true;
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}
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} else {
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as--;
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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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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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buffer.p[i] = {re, im};
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}
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//AudioOutput::fill_audio_buffer(preview_audio_buffer, true);
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}
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void AudioTXProcessor::on_message(const Message* const msg) {
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const auto message = *reinterpret_cast<const AudioTXConfigMessage*>(msg);
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switch(msg->id) {
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case Message::ID::AudioTXConfig:
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fm_delta = message.fm_delta * (0xFFFFFFULL / 1536000);
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divider = message.divider;
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ctcss_enabled = message.ctcss_enabled;
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ctcss_phase_inc = message.ctcss_phase_inc;
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as = 0;
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configured = true;
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break;
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case Message::ID::FIFOData:
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audio_fifo.in(static_cast<const FIFODataMessage*>(msg)->data, 512);
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asked = false;
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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<AudioTXProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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