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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_DEVICE_PROVIDER_H_
#define CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_DEVICE_PROVIDER_H_
#include "base/callback_list.h"
#include "media/audio/audio_system.h"
class MediaNotificationDeviceProvider {
public:
virtual ~MediaNotificationDeviceProvider() = default;
using GetOutputDevicesCallbackList =
base::RepeatingCallbackList<void(const media::AudioDeviceDescriptions&)>;
using GetOutputDevicesCallback = GetOutputDevicesCallbackList::CallbackType;
// Register a callback that will be invoked with the list of audio output
// devices currently available. After the first invocation the callback will
// be run whenever a change in connected audio devices is detected.
virtual base::CallbackListSubscription
RegisterOutputDeviceDescriptionsCallback(GetOutputDevicesCallback cb) = 0;
// Query the system for audio output devices and reply via callback.
virtual void GetOutputDeviceDescriptions(
media::AudioSystem::OnDeviceDescriptionsCallback) = 0;
};
#endif // CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_DEVICE_PROVIDER_H_
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