AutomotiveCarAudioRecord.java
/*
* Copyright 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 androidx.car.app.media;
import static android.Manifest.permission.RECORD_AUDIO;
import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresPermission;
import androidx.annotation.RestrictTo;
import androidx.car.app.CarContext;
/**
* A {@link CarAudioRecord} for automotive OS.
*
* @hide
*/
@RestrictTo(LIBRARY_GROUP)
public class AutomotiveCarAudioRecord extends CarAudioRecord {
/**
* Only used for Automotive, as the car microphone is the device microphone.
*/
@NonNull
private final AudioRecord mAudioRecord;
@RequiresPermission(RECORD_AUDIO)
public AutomotiveCarAudioRecord(
@NonNull CarContext carContext) {
super(carContext);
mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, AUDIO_CONTENT_SAMPLING_RATE,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_DEFAULT, AUDIO_CONTENT_BUFFER_SIZE);
}
@Override
protected void startRecordingInternal(
@NonNull OpenMicrophoneResponse openMicrophoneResponse) {
mAudioRecord.startRecording();
}
@Override
protected void stopRecordingInternal() {
mAudioRecord.stop();
}
@Override
protected int readInternal(@NonNull byte[] audioData, int offsetInBytes, int sizeInBytes) {
return mAudioRecord.read(audioData, offsetInBytes, sizeInBytes);
}
}