audio_system_win32.hpp

// Copyright Take Vos 2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "audio_system.hpp"
#include "audio_system_delegate.hpp"
#include "audio_device_id.hpp"
#include "../wfree_fifo.hpp"
#include <memory>
 
struct IMMDeviceEnumerator;
 
namespace hi::inline v1 {
 
class audio_system_win32_notification_client;
 
class audio_system_win32;
 
struct audio_system_win32_event {
    virtual void handle_event(audio_system_win32 *self) noexcept = 0;
};
 
class audio_system_win32 : public audio_system {
public:
    using super = audio_system;
 
    audio_system_win32(std::weak_ptr<audio_system_delegate> delegate);
    ~audio_system_win32();
 
    void init() noexcept override;
 
    [[nodiscard]] std::vector<audio_device *> devices() noexcept override
    {
        auto r = std::vector<audio_device *>{};
        r.reserve(size(_devices));
        for (hilet &device : _devices) {
            r.push_back(device.get());
        }
        return r;
    }
 
    void update_device_list() noexcept;
 
private:
    std::vector<std::shared_ptr<audio_device>> _devices;
 
    IMMDeviceEnumerator *_device_enumerator;
    audio_system_win32_notification_client *_notification_client;
 
    void default_device_changed(hi::audio_device_id const &device_id) noexcept;
    void device_added(hi::audio_device_id const &device_id) noexcept;
    void device_removed(hi::audio_device_id const &device_id) noexcept;
    void device_state_changed(hi::audio_device_id const &device_id) noexcept;
    void device_property_value_changed(hi::audio_device_id const &device_id) noexcept;
 
    friend audio_system_win32_notification_client;
};
 
} // namespace hi::inline v1