112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
// Copyright 2016 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Main loop of the brillo audio service.
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#ifndef BRILLO_AUDIO_AUDIOSERVICE_AUDIO_DAEMON_H_
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#define BRILLO_AUDIO_AUDIOSERVICE_AUDIO_DAEMON_H_
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#include <memory>
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#include <stack>
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#include <vector>
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#include <base/files/file.h>
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#include <base/memory/weak_ptr.h>
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#include <brillo/binder_watcher.h>
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#include <brillo/daemons/daemon.h>
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#include <media/IAudioPolicyService.h>
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#include "audio_device_handler.h"
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#include "audio_volume_handler.h"
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#include "brillo_audio_service.h"
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namespace brillo {
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class AudioDaemon : public Daemon {
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public:
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AudioDaemon() {}
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virtual ~AudioDaemon();
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protected:
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// Initialize the audio daemon handlers and start pollig the files in
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// /dev/input.
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int OnInit() override;
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private:
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friend class AudioDaemonTest;
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FRIEND_TEST(AudioDaemonTest, RegisterService);
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FRIEND_TEST(AudioDaemonTest, TestAPSConnectInitializesHandlersOnlyOnce);
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FRIEND_TEST(AudioDaemonTest, TestDeviceCallbackInitializesBASIfNULL);
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// Callback function for input events. Events are handled by the audio device
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// handler.
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void EventCallback(base::File* file);
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// Callback function for device state changes. Events are handler by the
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// audio service.
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//
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// |mode| is kDevicesConnected when |devices| are connected.
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// |devices| is a vector of integers representing audio_devices_t.
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void DeviceCallback(AudioDeviceHandler::DeviceConnectionState,
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const std::vector<int>& devices);
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// Callback function when volume changes.
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//
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// |stream| is an audio_stream_type_t representing the stream.
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// |previous_index| is the volume index before the key press.
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// |current_index| is the volume index after the key press.
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void VolumeCallback(audio_stream_type_t stream,
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int previous_index,
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int current_index);
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// Callback function for audio policy service death notification.
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void OnAPSDisconnected();
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// Connect to the audio policy service and register a callback to be invoked
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// if the audio policy service dies.
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void ConnectToAPS();
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// Register the brillo audio service with the service manager.
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void InitializeBrilloAudioService();
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// Initialize all audio daemon handlers.
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//
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// Note: This can only occur after we have connected to the audio policy
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// service.
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virtual void InitializeHandlers();
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// Store the file objects that are created during initialization for the files
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// being polled. This is done so these objects can be freed when the
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// AudioDaemon object is destroyed.
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std::stack<base::File> files_;
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// Handler for audio device input events.
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std::shared_ptr<AudioDeviceHandler> audio_device_handler_;
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// Handler for volume key press input events.
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std::shared_ptr<AudioVolumeHandler> audio_volume_handler_;
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// Used to generate weak_ptr to AudioDaemon for use in base::Bind.
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base::WeakPtrFactory<AudioDaemon> weak_ptr_factory_{this};
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// Pointer to the audio policy service.
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android::sp<android::IAudioPolicyService> aps_;
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// Flag to indicate whether the handlers have been initialized.
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bool handlers_initialized_ = false;
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// Binder watcher to watch for binder messages.
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BinderWatcher binder_watcher_;
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// Brillo audio service. Used for scheduling callbacks to clients.
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android::sp<BrilloAudioService> brillo_audio_service_;
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};
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} // namespace brillo
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#endif // BRILLO_AUDIO_AUDIOSERVICE_AUDIO_DAEMON_H_
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