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      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.os.Parcel;
     20 import android.os.Parcelable;
     21 
     22 /**
     23  * Represents the audio configuration for a Bluetooth A2DP source device.
     24  *
     25  * {@see BluetoothA2dpSink}
     26  *
     27  * {@hide}
     28  */
     29 public final class BluetoothAudioConfig implements Parcelable {
     30 
     31     private final int mSampleRate;
     32     private final int mChannelConfig;
     33     private final int mAudioFormat;
     34 
     35     public BluetoothAudioConfig(int sampleRate, int channelConfig, int audioFormat) {
     36         mSampleRate = sampleRate;
     37         mChannelConfig = channelConfig;
     38         mAudioFormat = audioFormat;
     39     }
     40 
     41     @Override
     42     public boolean equals(Object o) {
     43         if (o instanceof BluetoothAudioConfig) {
     44             BluetoothAudioConfig bac = (BluetoothAudioConfig) o;
     45             return (bac.mSampleRate == mSampleRate && bac.mChannelConfig == mChannelConfig
     46                     && bac.mAudioFormat == mAudioFormat);
     47         }
     48         return false;
     49     }
     50 
     51     @Override
     52     public int hashCode() {
     53         return mSampleRate | (mChannelConfig << 24) | (mAudioFormat << 28);
     54     }
     55 
     56     @Override
     57     public String toString() {
     58         return "{mSampleRate:" + mSampleRate + ",mChannelConfig:" + mChannelConfig
     59                 + ",mAudioFormat:" + mAudioFormat + "}";
     60     }
     61 
     62     @Override
     63     public int describeContents() {
     64         return 0;
     65     }
     66 
     67     public static final Parcelable.Creator<BluetoothAudioConfig> CREATOR =
     68             new Parcelable.Creator<BluetoothAudioConfig>() {
     69                 public BluetoothAudioConfig createFromParcel(Parcel in) {
     70                     int sampleRate = in.readInt();
     71                     int channelConfig = in.readInt();
     72                     int audioFormat = in.readInt();
     73                     return new BluetoothAudioConfig(sampleRate, channelConfig, audioFormat);
     74                 }
     75 
     76                 public BluetoothAudioConfig[] newArray(int size) {
     77                     return new BluetoothAudioConfig[size];
     78                 }
     79             };
     80 
     81     @Override
     82     public void writeToParcel(Parcel out, int flags) {
     83         out.writeInt(mSampleRate);
     84         out.writeInt(mChannelConfig);
     85         out.writeInt(mAudioFormat);
     86     }
     87 
     88     /**
     89      * Returns the sample rate in samples per second
     90      *
     91      * @return sample rate
     92      */
     93     public int getSampleRate() {
     94         return mSampleRate;
     95     }
     96 
     97     /**
     98      * Returns the channel configuration (either {@link android.media.AudioFormat#CHANNEL_IN_MONO}
     99      * or {@link android.media.AudioFormat#CHANNEL_IN_STEREO})
    100      *
    101      * @return channel configuration
    102      */
    103     public int getChannelConfig() {
    104         return mChannelConfig;
    105     }
    106 
    107     /**
    108      * Returns the channel audio format (either {@link android.media.AudioFormat#ENCODING_PCM_16BIT}
    109      * or {@link android.media.AudioFormat#ENCODING_PCM_8BIT}
    110      *
    111      * @return audio format
    112      */
    113     public int getAudioFormat() {
    114         return mAudioFormat;
    115     }
    116 }
    117