1 /*
2  * Copyright (C) 2009 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.bluetooth;
18 
19 import android.annotation.Nullable;
20 import android.os.Parcel;
21 import android.os.Parcelable;
22 
23 /**
24  * Represents the audio configuration for a Bluetooth A2DP source device.
25  *
26  * {@see BluetoothA2dpSink}
27  *
28  * {@hide}
29  */
30 public final class BluetoothAudioConfig implements Parcelable {
31 
32     private final int mSampleRate;
33     private final int mChannelConfig;
34     private final int mAudioFormat;
35 
BluetoothAudioConfig(int sampleRate, int channelConfig, int audioFormat)36     public BluetoothAudioConfig(int sampleRate, int channelConfig, int audioFormat) {
37         mSampleRate = sampleRate;
38         mChannelConfig = channelConfig;
39         mAudioFormat = audioFormat;
40     }
41 
42     @Override
equals(@ullable Object o)43     public boolean equals(@Nullable Object o) {
44         if (o instanceof BluetoothAudioConfig) {
45             BluetoothAudioConfig bac = (BluetoothAudioConfig) o;
46             return (bac.mSampleRate == mSampleRate && bac.mChannelConfig == mChannelConfig
47                     && bac.mAudioFormat == mAudioFormat);
48         }
49         return false;
50     }
51 
52     @Override
hashCode()53     public int hashCode() {
54         return mSampleRate | (mChannelConfig << 24) | (mAudioFormat << 28);
55     }
56 
57     @Override
toString()58     public String toString() {
59         return "{mSampleRate:" + mSampleRate + ",mChannelConfig:" + mChannelConfig
60                 + ",mAudioFormat:" + mAudioFormat + "}";
61     }
62 
63     @Override
describeContents()64     public int describeContents() {
65         return 0;
66     }
67 
68     public static final @android.annotation.NonNull Parcelable.Creator<BluetoothAudioConfig> CREATOR =
69             new Parcelable.Creator<BluetoothAudioConfig>() {
70                 public BluetoothAudioConfig createFromParcel(Parcel in) {
71                     int sampleRate = in.readInt();
72                     int channelConfig = in.readInt();
73                     int audioFormat = in.readInt();
74                     return new BluetoothAudioConfig(sampleRate, channelConfig, audioFormat);
75                 }
76 
77                 public BluetoothAudioConfig[] newArray(int size) {
78                     return new BluetoothAudioConfig[size];
79                 }
80             };
81 
82     @Override
writeToParcel(Parcel out, int flags)83     public void writeToParcel(Parcel out, int flags) {
84         out.writeInt(mSampleRate);
85         out.writeInt(mChannelConfig);
86         out.writeInt(mAudioFormat);
87     }
88 
89     /**
90      * Returns the sample rate in samples per second
91      *
92      * @return sample rate
93      */
getSampleRate()94     public int getSampleRate() {
95         return mSampleRate;
96     }
97 
98     /**
99      * Returns the channel configuration (either {@link android.media.AudioFormat#CHANNEL_IN_MONO}
100      * or {@link android.media.AudioFormat#CHANNEL_IN_STEREO})
101      *
102      * @return channel configuration
103      */
getChannelConfig()104     public int getChannelConfig() {
105         return mChannelConfig;
106     }
107 
108     /**
109      * Returns the channel audio format (either {@link android.media.AudioFormat#ENCODING_PCM_16BIT}
110      * or {@link android.media.AudioFormat#ENCODING_PCM_8BIT}
111      *
112      * @return audio format
113      */
getAudioFormat()114     public int getAudioFormat() {
115         return mAudioFormat;
116     }
117 }
118