VirtualCameraInfo.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.camera.core.impl.utils.TransformUtils.within360;
import android.os.Build;
import android.view.Surface;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.impl.CameraInfoInternal;
import androidx.camera.core.impl.ForwardingCameraInfo;
import androidx.camera.core.impl.ImageOutputConfig;
import java.util.UUID;
/**
* A {@link CameraInfoInternal} that returns info of the virtual camera.
*/
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class VirtualCameraInfo extends ForwardingCameraInfo {
private final String mVirtualCameraId;
private int mVirtualCameraRotationDegrees;
VirtualCameraInfo(@NonNull CameraInfoInternal cameraInfoInternal) {
super(cameraInfoInternal);
// Generate a unique ID for the virtual camera.
mVirtualCameraId =
"virtual-" + cameraInfoInternal.getCameraId() + "-" + UUID.randomUUID().toString();
}
/**
* Override the parent camera ID.
*/
@NonNull
@Override
public String getCameraId() {
return mVirtualCameraId;
}
/**
* Sets the rotation applied by this virtual camera.
*/
void setVirtualCameraRotationDegrees(int virtualCameraRotationDegrees) {
mVirtualCameraRotationDegrees = virtualCameraRotationDegrees;
}
@Override
public int getSensorRotationDegrees() {
return getSensorRotationDegrees(Surface.ROTATION_0);
}
@Override
public int getSensorRotationDegrees(@ImageOutputConfig.RotationValue int relativeRotation) {
// The child UseCase calls this method to get the remaining rotation degrees, which is the
// original rotation minus the rotation applied by the virtual camera.
return within360(
super.getSensorRotationDegrees(relativeRotation) - mVirtualCameraRotationDegrees);
}
}