mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-23 08:27:44 +00:00
108 lines
2.8 KiB
C++
108 lines
2.8 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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#include "proc_fsk.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 FSKProcessor::execute(const buffer_c8_t& buffer) {
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int8_t re, im;
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// This is called at 2.28M/2048 = 1113Hz
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for (size_t i = 0; i < buffer.count; i++) {
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if (configured) {
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if (sample_count >= samples_per_bit) {
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if (bit_pos > length) {
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// End of data
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cur_bit = 0;
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txprogress_message.done = true;
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shared_memory.application_queue.push(txprogress_message);
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configured = false;
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} else {
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cur_bit = (shared_memory.bb_data.data[bit_pos >> 3] << (bit_pos & 7)) & 0x80;
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bit_pos++;
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if (progress_count >= progress_notice) {
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progress_count = 0;
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txprogress_message.progress++;
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txprogress_message.done = false;
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shared_memory.application_queue.push(txprogress_message);
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} else {
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progress_count++;
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}
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}
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sample_count = 0;
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} else {
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sample_count++;
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}
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if (cur_bit)
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phase += shift_one;
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else
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phase += shift_zero;
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sphase = phase + (64 << 24);
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re = (sine_table_i8[(sphase & 0xFF000000) >> 24]);
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im = (sine_table_i8[(phase & 0xFF000000) >> 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 FSKProcessor::on_message(const Message* const p) {
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const auto message = *reinterpret_cast<const FSKConfigureMessage*>(p);
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if (message.id == Message::ID::FSKConfigure) {
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samples_per_bit = message.samples_per_bit;
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length = message.stream_length + 32; // Why ?!
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shift_one = message.shift * (0xFFFFFFFFULL / 2280000);
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shift_zero = -shift_one;
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progress_notice = message.progress_notice;
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sample_count = samples_per_bit;
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progress_count = 0;
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bit_pos = 0;
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cur_bit = 0;
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txprogress_message.progress = 0;
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txprogress_message.done = false;
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configured = true;
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}
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<FSKProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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