HackRF-Treasure-Chest/Software/portapack-mayhem/firmware/baseband/tone_gen.cpp

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2022-09-22 18:26:57 +02:00
/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2017 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 "tone_gen.hpp"
#include "sine_table_int8.hpp"
/*
int32_t ToneGen::tone_sine() {
// TODO : Added for Sonde App. We keep it by now , but it needs to be reviewed in Sonde
// Hoepfully we can manage without it , same as previous fw 1.3.1
int32_t tone_sample = sine_table_i8[tone_phase_] * 0x1000000;
tone_phase_ += delta_;
return tone_sample;
}
*/
int32_t ToneGen::tone_square() {
// TODO : Added for Sonde App. We keep it by now , but it needs to be reviewed in Sonde
int32_t tone_sample = 0;
if(tone_phase_ < (UINT32_MAX / 2)) {
tone_sample = INT32_MAX;
}
else {
tone_sample = INT32_MIN;
}
tone_phase_ += delta_;
return tone_sample;
}
/*
void ToneGen::configure(const uint32_t delta, const float tone_mix_weight) {
// Confirmed ! It is not working well in the fw 1.4.4 Mic App , CTCSS generation, (but added for Sonde App)
// I Think it should be deleted or modified but not use it as it is in Mic App .
delta_ = (uint8_t) ((delta & 0xFF000000U) >> 24);
delta_ = delta;
tone_mix_weight_ = tone_mix_weight;
input_mix_weight_ = 1.0 - tone_mix_weight;
current_tone_type_ = sine;
}
*/
void ToneGen::configure(const uint32_t freq, const float tone_mix_weight, const tone_type tone_type, const uint32_t sample_rate) {
// TODO : Added for Sonde App. We keep it by now to avoid compile errors, but it needs to be reviewed in Sonde
delta_ = (uint8_t) ((freq * sizeof(sine_table_i8)) / sample_rate);
tone_mix_weight_ = tone_mix_weight;
input_mix_weight_ = 1.0 - tone_mix_weight;
current_tone_type_ = tone_type;
}
// ----Original available core SW code from fw 1.3.1 , Working also well in Mic App CTCSS Gen from fw 1.4.0 onwards
// Original direct-look-up synthesis algorithm with Fractional delta phase. It is OK
// Delta and Accumulator fase are stored in 32 bits (4 bytes), 1st top byte used as Modulo-256 Sine look-up table [index]
// the lower 3 bytes (24 bits) are used as a Fractional Detla and Accumulator phase, to have very finer Fstep control.
void ToneGen::configure(const uint32_t delta, const float tone_mix_weight) {
delta_ = delta;
tone_mix_weight_ = tone_mix_weight;
input_mix_weight_ = 1.0 - tone_mix_weight;
}
int32_t ToneGen::process(const int32_t sample_in) {
if (!delta_)
return sample_in;
int32_t tone_sample = sine_table_i8[(tone_phase_ & 0xFF000000U) >> 24];
tone_phase_ += delta_;
return (sample_in * input_mix_weight_) + (tone_sample * tone_mix_weight_);
}
// -------------------------------------------------------------
int32_t ToneGen::process_square(const int32_t sample_in) {
// TODO : Added for Sonde App. We keep it by now , but it needs to be reviewed in Sonde
if (!delta_)
return sample_in;
int32_t tone_sample = 0;
tone_sample = tone_square();
return (sample_in * input_mix_weight_) + (tone_sample * tone_mix_weight_);
}