mirror of
https://github.com/TomHarte/CLK.git
synced 2024-08-16 16:28:59 +00:00
50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
//
|
|
// Speaker.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 03/12/2016.
|
|
// Copyright 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "SoundGenerator.hpp"
|
|
|
|
#include <cstring>
|
|
|
|
using namespace Electron;
|
|
|
|
SoundGenerator::SoundGenerator(Concurrency::DeferringAsyncTaskQueue &audio_queue) :
|
|
audio_queue_(audio_queue) {}
|
|
|
|
void SoundGenerator::set_sample_volume_range(std::int16_t range) {
|
|
volume_ = static_cast<unsigned int>(range / 2);
|
|
}
|
|
|
|
void SoundGenerator::get_samples(std::size_t number_of_samples, int16_t *target) {
|
|
if(is_enabled_) {
|
|
while(number_of_samples--) {
|
|
*target = static_cast<int16_t>((counter_ / (divider_+1)) * volume_);
|
|
target++;
|
|
counter_ = (counter_ + 1) % ((divider_+1) * 2);
|
|
}
|
|
} else {
|
|
std::memset(target, 0, sizeof(int16_t) * number_of_samples);
|
|
}
|
|
}
|
|
|
|
void SoundGenerator::skip_samples(std::size_t number_of_samples) {
|
|
counter_ = (counter_ + number_of_samples) % ((divider_+1) * 2);
|
|
}
|
|
|
|
void SoundGenerator::set_divider(uint8_t divider) {
|
|
audio_queue_.defer([=]() {
|
|
divider_ = divider * 32 / clock_rate_divider;
|
|
});
|
|
}
|
|
|
|
void SoundGenerator::set_is_enabled(bool is_enabled) {
|
|
audio_queue_.defer([=]() {
|
|
is_enabled_ = is_enabled;
|
|
counter_ = 0;
|
|
});
|
|
}
|