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55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
//
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// Speaker.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 03/12/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#include "SoundGenerator.hpp"
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#include <cstring>
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using namespace Electron;
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SoundGenerator::SoundGenerator(Concurrency::AsyncTaskQueue<false> &audio_queue) :
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audio_queue_(audio_queue) {}
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void SoundGenerator::set_sample_volume_range(std::int16_t range) {
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volume_ = unsigned(range / 2);
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}
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template <Outputs::Speaker::Action action>
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void SoundGenerator::apply_samples(std::size_t number_of_samples, Outputs::Speaker::MonoSample *target) {
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if constexpr (action == Outputs::Speaker::Action::Ignore) {
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counter_ = (counter_ + number_of_samples) % ((divider_+1) * 2);
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return;
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}
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if(is_enabled_) {
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while(number_of_samples--) {
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Outputs::Speaker::apply<action>(*target, Outputs::Speaker::MonoSample((counter_ / (divider_+1)) * volume_));
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target++;
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counter_ = (counter_ + 1) % ((divider_+1) * 2);
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}
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} else {
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Outputs::Speaker::fill<action>(target, target + number_of_samples, Outputs::Speaker::MonoSample(0));
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}
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}
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template void SoundGenerator::apply_samples<Outputs::Speaker::Action::Mix>(std::size_t, Outputs::Speaker::MonoSample *);
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template void SoundGenerator::apply_samples<Outputs::Speaker::Action::Store>(std::size_t, Outputs::Speaker::MonoSample *);
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template void SoundGenerator::apply_samples<Outputs::Speaker::Action::Ignore>(std::size_t, Outputs::Speaker::MonoSample *);
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void SoundGenerator::set_divider(uint8_t divider) {
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audio_queue_.enqueue([this, divider]() {
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divider_ = divider * 32 / clock_rate_divider;
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});
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}
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void SoundGenerator::set_is_enabled(bool is_enabled) {
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audio_queue_.enqueue([this, is_enabled]() {
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is_enabled_ = is_enabled;
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counter_ = 0;
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});
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}
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