47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
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// the note queue is a wrapper for a FIFO array to which the midi/keyboard controller enters note events into and the synthesizer consumes from
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#pragma once
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#include <array>
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#include <atomic>
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#include <cstdint>
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#include <chrono>
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#include "ConfigService.hpp"
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#include "LoggerService.hpp"
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enum NoteEventType {
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NoteOn = 0,
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NoteOff
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};
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struct NoteEvent {
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NoteEventType type; // noteOn or noteOff
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uint8_t note; // 0-128, a keyboard goes 0-87
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float velocity; // 0-1, from a midi instrument its 0-127 though
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std::chrono::time_point<std::chrono::high_resolution_clock> timestamp;
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};
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class NoteQueue {
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public:
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NoteQueue();
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NoteQueue(ConfigService* config, LoggerService* logger);
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~NoteQueue() = default;
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bool push(const NoteEvent& event);
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bool pop(NoteEvent& event);
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private:
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ConfigService* config_;
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LoggerService* logger_;
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static constexpr size_t SYNTH_NOTE_QUEUE_SIZE = 128; // TODO: config
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std::array<NoteEvent, SYNTH_NOTE_QUEUE_SIZE> buffer_;
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std::atomic<size_t> head_{ 0 };
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std::atomic<size_t> tail_{ 0 };
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};
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