79 lines
3.1 KiB
Java
79 lines
3.1 KiB
Java
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/*
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* Copyright (C) 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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package android.media;
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import android.os.Handler;
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import android.os.Looper;
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/**
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* AudioRouting defines an interface for controlling routing and routing notifications in
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* AudioTrack and AudioRecord objects.
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*/
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public interface AudioRouting {
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/**
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* Specifies an audio device (via an {@link AudioDeviceInfo} object) to route
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* the output/input to/from.
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* @param deviceInfo The {@link AudioDeviceInfo} specifying the audio sink or source.
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* If deviceInfo is null, default routing is restored.
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* @return true if succesful, false if the specified {@link AudioDeviceInfo} is non-null and
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* does not correspond to a valid audio device.
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*/
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public boolean setPreferredDevice(AudioDeviceInfo deviceInfo);
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/**
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* Returns the selected output/input specified by {@link #setPreferredDevice}. Note that this
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* is not guaranteed to correspond to the actual device being used for playback/recording.
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*/
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public AudioDeviceInfo getPreferredDevice();
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/**
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* Returns an {@link AudioDeviceInfo} identifying the current routing of this
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* AudioTrack/AudioRecord.
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* Note: The query is only valid if the AudioTrack/AudioRecord is currently playing.
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* If it is not, <code>getRoutedDevice()</code> will return null.
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*/
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public AudioDeviceInfo getRoutedDevice();
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/**
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* Adds an {@link AudioRouting.OnRoutingChangedListener} to receive notifications of routing
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* changes on this AudioTrack/AudioRecord.
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* @param listener The {@link AudioRouting.OnRoutingChangedListener} interface to receive
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* notifications of rerouting events.
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* @param handler Specifies the {@link Handler} object for the thread on which to execute
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* the callback. If <code>null</code>, the {@link Handler} associated with the main
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* {@link Looper} will be used.
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*/
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public void addOnRoutingChangedListener(OnRoutingChangedListener listener,
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Handler handler);
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/**
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* Removes an {@link AudioRouting.OnRoutingChangedListener} which has been previously added
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* to receive rerouting notifications.
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* @param listener The previously added {@link AudioRouting.OnRoutingChangedListener} interface
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* to remove.
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*/
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public void removeOnRoutingChangedListener(OnRoutingChangedListener listener);
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/**
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* Defines the interface by which applications can receive notifications of routing
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* changes for the associated {@link AudioRouting}.
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*/
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public interface OnRoutingChangedListener {
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public void onRoutingChanged(AudioRouting router);
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}
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}
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