portapack-mayhem/firmware/baseband/proc_jammer.cpp
furrtek d18b6d135d Restoring jammer and RDS functionalities, please wait...
Started work on frequency manager and numbers station simulator
2016-12-23 18:31:01 +01:00

143 lines
3.4 KiB
C++

/*
* Copyright (C) 2014 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_jammer.hpp"
#include "portapack_shared_memory.hpp"
#include "sine_table_int8.hpp"
#include "event_m4.hpp"
#include <cstdint>
#define POLY_MASK_32 0xB4BCD35C
void JammerProcessor::execute(const buffer_c8_t& buffer) {
if (!configured) return;
for (size_t i = 0; i<buffer.count; i++) {
if (s >= 10000) { //shared_memory.jammer_ranges[ir].duration
s = 0;
for (;;) {
ir++;
if (ir > 15) ir = 0;
if (jammer_ranges[ir].enabled == true) break;
}
jammer_bw = jammer_ranges[ir].width / 2;
message.freq = jammer_ranges[ir].center;
shared_memory.application_queue.push(message);
} else {
s++;
}
// Ramp
/*if (r >= 10) {
if (sample < 128)
sample++;
else
sample = -127;
r = 0;
} else {
r++;
}*/
// Phase
if (r >= 70) {
aphase += ((aphase>>4) ^ 0x4573) << 14;
r = 0;
} else {
r++;
}
aphase += 8830;
sample = sine_table_i8[(sphase & 0x03FC0000) >> 18];
// FM
delta = sample * jammer_bw;
phase = (phase + delta);
sphase = phase + (64 << 18);
re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
buffer.p[i] = {(int8_t)re, (int8_t)im};
}
};
void JammerProcessor::on_message(const Message* const msg) {
jammer_ranges = (JammerRange*)shared_memory.tx_data;
/*const auto message = *reinterpret_cast<const DTMFTXConfigMessage*>(msg);
if (message.id == Message::ID::DTMFTXConfig) {
// Translate DTMF message to index in DTMF frequencies table
tone_ptr = &shared_memory.tx_data[0];
for (;;) {
tone_code = *tone_ptr;
if (tone_code == 0xFF)
break; // End of message
else if (tone_code <= 9)
// That's already fine bro.
*tone_ptr = tone_code;
else if (tone_code == 'A')
*tone_ptr = 10;
else if (tone_code == 'B')
*tone_ptr = 11;
else if (tone_code == 'C')
*tone_ptr = 12;
else if (tone_code == 'D')
*tone_ptr = 13;
else if (tone_code == '#')
*tone_ptr = 14;
else if (tone_code == '*')
*tone_ptr = 15;
else {
*tone_ptr = 0xFF; // Invalid character, stop here
}
tone_ptr++;
}
// 1<<18 = 262144
// m = (262144 * a) / 1536000
// a = 262144 / 1536000 (*1000 = 171)
bw = 171 * (message.bw);
tone_length = message.tone_length * 154; // 153.6
pause_length = message.pause_length * 154; // 153.6
as = 0;
tone = false;
timer = 0;
tone_idx = 0;
configured = true;
}*/
}
int main() {
EventDispatcher event_dispatcher { std::make_unique<JammerProcessor>() };
event_dispatcher.run();
return 0;
}