mirror of
https://github.com/eried/portapack-mayhem.git
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105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
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/*
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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_epar.hpp"
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#include "dsp_iir_config.hpp"
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#include "audio_output.hpp"
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#include "portapack_shared_memory.hpp"
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#include "sine_table.hpp"
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#include <cstdint>
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void EPARProcessor::execute(const buffer_c8_t& buffer) {
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// This is called at 1536000/2048 = 750Hz
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for (size_t i = 0; i<buffer.count; i++) {
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// Sample generation rate: 1536000/10 = 153kHz
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if (s >= 9) {
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s = 0;
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if (sample_count >= EPAR_TU) {
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if (state) {
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// Send code
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if (current_tu == 2) {
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current_bit = shared_memory.epardata[bit_pos];
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if (bit_pos == 12) {
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bit_pos = 0;
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current_tu = 0;
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state = 0;
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} else {
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bit_pos++;
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}
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current_tu = 0;
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} else {
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current_tu++;
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}
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sample = bitdef[current_bit][current_tu];
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} else {
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// Pause
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if (current_tu == EPAR_SPACE) {
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if (repeat_count == EPAR_REPEAT) {
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message.n = 100; // End of transmission code
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shared_memory.transmit_done = true;
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shared_memory.application_queue.push(message);
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}
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if (shared_memory.transmit_done == false) {
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message.n = repeat_count; // Inform UI about progress (just as eye candy)
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shared_memory.application_queue.push(message);
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state = 1;
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}
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repeat_count++;
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current_tu = 0;
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} else {
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current_tu++;
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}
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sample = 0;
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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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} else {
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s++;
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}
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//FM
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frq = sample * 1000; // ~25kHz wide
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phase = (phase + frq);
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sphase = phase + (256<<16);
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re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
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im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
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buffer.p[i] = {(int8_t)re,(int8_t)im};
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}
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}
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