VirtualCameraControl.java
/*
* Copyright 2023 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.camera.core.streamsharing;
import static androidx.core.util.Preconditions.checkArgument;
import static java.util.Collections.singletonList;
import static java.util.Objects.requireNonNull;
import android.os.Build;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.ImageCapture;
import androidx.camera.core.impl.CameraControlInternal;
import androidx.camera.core.impl.CaptureConfig;
import androidx.camera.core.impl.ForwardingCameraControl;
import androidx.camera.core.impl.utils.futures.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
/**
* A {@link CameraControlInternal} that is used to control the virtual camera.
*/
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class VirtualCameraControl extends ForwardingCameraControl {
private static final int DEFAULT_JPEG_QUALITY = 100;
private static final int DEFAULT_ROTATION_DEGREES = 0;
private final StreamSharing.Control mStreamSharingControl;
VirtualCameraControl(@NonNull CameraControlInternal parent,
@NonNull StreamSharing.Control streamSharingControl) {
super(parent);
mStreamSharingControl = streamSharingControl;
}
@NonNull
@Override
public ListenableFuture<List<Void>> submitStillCaptureRequests(
@NonNull List<CaptureConfig> captureConfigs,
@ImageCapture.CaptureMode int captureMode,
@ImageCapture.FlashType int flashType) {
checkArgument(captureConfigs.size() == 1, "Only support one capture config.");
return Futures.allAsList(singletonList(mStreamSharingControl.jpegSnapshot(
getJpegQuality(captureConfigs.get(0)),
getRotationDegrees(captureConfigs.get(0)))));
}
private int getJpegQuality(@NonNull CaptureConfig captureConfig) {
return requireNonNull(captureConfig.getImplementationOptions().retrieveOption(
CaptureConfig.OPTION_JPEG_QUALITY, DEFAULT_JPEG_QUALITY));
}
private int getRotationDegrees(@NonNull CaptureConfig captureConfig) {
return requireNonNull(captureConfig.getImplementationOptions().retrieveOption(
CaptureConfig.OPTION_ROTATION, DEFAULT_ROTATION_DEGREES));
}
}