1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.companion.virtual.audio;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.RequiresPermission;
import android.annotation.SystemApi;
import android.companion.virtual.IVirtualDevice;
import android.content.Context;
import android.hardware.display.VirtualDisplay;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioPlaybackConfiguration;
import android.media.AudioRecordingConfiguration;
import android.os.RemoteException;
import java.io.Closeable;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.Executor;
/**
* The class stores an {@link AudioCapture} for audio capturing and an {@link AudioInjection} for
* audio injection.
*
* @hide
*/
@SystemApi
public final class VirtualAudioDevice implements Closeable {
/**
* Interface to be notified when playback or recording configuration of applications running on
* virtual display was changed.
*
* @hide
*/
@SystemApi
public interface AudioConfigurationChangeCallback {
/**
* Notifies when playback configuration of applications running on virtual display was
* changed.
*/
void onPlaybackConfigChanged(@NonNull List<AudioPlaybackConfiguration> configs);
/**
* Notifies when recording configuration of applications running on virtual display was
* changed.
*/
void onRecordingConfigChanged(@NonNull List<AudioRecordingConfiguration> configs);
}
private final Context mContext;
private final IVirtualDevice mVirtualDevice;
private final VirtualDisplay mVirtualDisplay;
private final AudioConfigurationChangeCallback mCallback;
private final Executor mExecutor;
@Nullable
private VirtualAudioSession mOngoingSession;
/**
* @hide
*/
public VirtualAudioDevice(Context context, IVirtualDevice virtualDevice,
@NonNull VirtualDisplay virtualDisplay, @Nullable Executor executor,
@Nullable AudioConfigurationChangeCallback callback) {
mContext = context;
mVirtualDevice = virtualDevice;
mVirtualDisplay = virtualDisplay;
mExecutor = executor;
mCallback = callback;
}
/**
* Begins injecting audio from a remote device into this device.
*
* @return An {@link AudioInjection} containing the injected audio.
*/
@RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
@NonNull
public AudioInjection startAudioInjection(@NonNull AudioFormat injectionFormat) {
Objects.requireNonNull(injectionFormat, "injectionFormat must not be null");
if (mOngoingSession != null && mOngoingSession.getAudioInjection() != null) {
throw new IllegalStateException("Cannot start an audio injection while a session is "
+ "ongoing. Call close() on this device first to end the previous session.");
}
if (mOngoingSession == null) {
mOngoingSession = new VirtualAudioSession(mContext, mCallback, mExecutor);
}
try {
mVirtualDevice.onAudioSessionStarting(mVirtualDisplay.getDisplay().getDisplayId(),
/* routingCallback= */ mOngoingSession,
/* configChangedCallback= */ mOngoingSession.getAudioConfigChangedListener());
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
return mOngoingSession.startAudioInjection(injectionFormat);
}
/**
* Begins recording audio emanating from this device.
*
* <p>Note: This method does not support capturing privileged playback, which means the
* application can opt out of capturing by {@link AudioManager#setAllowedCapturePolicy(int)}.
*
* @return An {@link AudioCapture} containing the recorded audio.
*/
@RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
@NonNull
public AudioCapture startAudioCapture(@NonNull AudioFormat captureFormat) {
Objects.requireNonNull(captureFormat, "captureFormat must not be null");
if (mOngoingSession != null && mOngoingSession.getAudioCapture() != null) {
throw new IllegalStateException("Cannot start an audio capture while a session is "
+ "ongoing. Call close() on this device first to end the previous session.");
}
if (mOngoingSession == null) {
mOngoingSession = new VirtualAudioSession(mContext, mCallback, mExecutor);
}
try {
mVirtualDevice.onAudioSessionStarting(mVirtualDisplay.getDisplay().getDisplayId(),
/* routingCallback= */ mOngoingSession,
/* configChangedCallback= */ mOngoingSession.getAudioConfigChangedListener());
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
return mOngoingSession.startAudioCapture(captureFormat);
}
/** Returns the {@link AudioCapture} instance. */
@Nullable
public AudioCapture getAudioCapture() {
return mOngoingSession != null ? mOngoingSession.getAudioCapture() : null;
}
/** Returns the {@link AudioInjection} instance. */
@Nullable
public AudioInjection getAudioInjection() {
return mOngoingSession != null ? mOngoingSession.getAudioInjection() : null;
}
/** Stops audio capture and injection then releases all the resources */
@RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_ROUTING)
@Override
public void close() {
if (mOngoingSession != null) {
mOngoingSession.close();
mOngoingSession = null;
try {
mVirtualDevice.onAudioSessionEnded();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
}
}
|
