mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 04:28:10 +00:00
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
/*
|
|
* 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"
|
|
|
|
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_);
|
|
}
|