ProjectedCarAudioRecord.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 static androidx.car.app.utils.LogTags.TAG;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresPermission;
import androidx.annotation.RestrictTo;
import androidx.car.app.CarContext;
import java.io.IOException;
import java.io.InputStream;
/**
* A {@link CarAudioRecord} for projection.
*
* @hide
*/
@RestrictTo(LIBRARY_GROUP)
public class ProjectedCarAudioRecord extends CarAudioRecord {
@Nullable
private InputStream mInputStream;
@RequiresPermission(RECORD_AUDIO)
public ProjectedCarAudioRecord(
@NonNull CarContext carContext) {
super(carContext);
}
@Override
protected void startRecordingInternal(@NonNull OpenMicrophoneResponse openMicrophoneResponse) {
mInputStream = openMicrophoneResponse.getCarMicrophoneInputStream();
}
@Override
protected void stopRecordingInternal() {
try {
if (mInputStream != null) {
mInputStream.close();
mInputStream = null;
}
} catch (IOException e) {
Log.e(TAG, "Exception closing microphone pipe", e);
}
}
@Override
protected int readInternal(@NonNull byte[] audioData, int offsetInBytes, int sizeInBytes) {
InputStream inputStream = mInputStream;
if (inputStream != null) {
try {
return inputStream.read(audioData, offsetInBytes, sizeInBytes);
} catch (IOException e) {
// stream is closed
stopRecording();
}
}
return -1;
}
}