midi_control_bus.hpp

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#pragma once

 
#include <pulp/midi/buffer.hpp>
#include <pulp/midi/message.hpp>
#include <pulp/runtime/spsc_queue.hpp>
#include <cstddef>
#include <cstdint>
 
namespace pulp::midi {
 
class MidiControlBus {
public:
    bool send(const MidiEvent& event) { return queue_.try_push(event); }

    bool send_cc(uint8_t channel, uint8_t cc, uint8_t value) {
        return send(MidiEvent::cc(channel, cc, value));
    }
    bool send_note_on(uint8_t channel, uint8_t note, uint8_t velocity) {
        return send(MidiEvent::note_on(channel, note, velocity));
    }
    bool send_note_off(uint8_t channel, uint8_t note) {
        return send(MidiEvent::note_off(channel, note));
    }

    void drain_into(MidiBuffer& out) {
        while (auto event = queue_.try_pop()) {
            event->sample_offset = 0;
            out.add(*event);
        }
    }

    template <typename Fn>
    void drain(Fn&& sink) {
        while (auto event = queue_.try_pop())
            sink(*event);
    }
 
private:
    static constexpr std::size_t kCapacity = 256;
    pulp::runtime::SpscQueue<MidiEvent, kCapacity> queue_;
};
 
} // namespace pulp::midi