mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 20:18:13 +00:00
105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2015 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_epar.hpp"
|
|
|
|
#include "dsp_iir_config.hpp"
|
|
#include "audio_output.hpp"
|
|
|
|
#include "portapack_shared_memory.hpp"
|
|
#include "sine_table.hpp"
|
|
|
|
#include <cstdint>
|
|
|
|
void EPARProcessor::execute(const buffer_c8_t& buffer) {
|
|
|
|
// This is called at 1536000/2048 = 750Hz
|
|
|
|
for (size_t i = 0; i<buffer.count; i++) {
|
|
|
|
// Sample generation rate: 1536000/10 = 153kHz
|
|
if (s >= 9) {
|
|
s = 0;
|
|
|
|
if (sample_count >= EPAR_TU) {
|
|
|
|
if (state) {
|
|
// Send code
|
|
if (current_tu == 2) {
|
|
current_bit = shared_memory.epardata[bit_pos];
|
|
if (bit_pos == 12) {
|
|
bit_pos = 0;
|
|
current_tu = 0;
|
|
state = 0;
|
|
} else {
|
|
bit_pos++;
|
|
}
|
|
|
|
current_tu = 0;
|
|
} else {
|
|
current_tu++;
|
|
}
|
|
|
|
sample = bitdef[current_bit][current_tu];
|
|
} else {
|
|
// Pause
|
|
if (current_tu == EPAR_SPACE) {
|
|
if (repeat_count == EPAR_REPEAT) {
|
|
message.n = 100; // End of transmission code
|
|
shared_memory.transmit_done = true;
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
if (shared_memory.transmit_done == false) {
|
|
message.n = repeat_count; // Inform UI about progress (just as eye candy)
|
|
shared_memory.application_queue.push(message);
|
|
state = 1;
|
|
}
|
|
repeat_count++;
|
|
current_tu = 0;
|
|
} else {
|
|
current_tu++;
|
|
}
|
|
sample = -127;
|
|
}
|
|
|
|
sample_count = 0;
|
|
} else {
|
|
sample_count++;
|
|
}
|
|
|
|
} else {
|
|
s++;
|
|
}
|
|
|
|
//FM
|
|
frq = sample * shared_memory.excursion; // 500=~3kHz wide
|
|
|
|
phase = (phase + frq);
|
|
sphase = phase + (256<<16);
|
|
|
|
re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
|
|
im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
|
|
|
|
buffer.p[i] = {(int8_t)re,(int8_t)im};
|
|
}
|
|
}
|