Camera2CameraInfo.java
/*
* Copyright 2019 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.camera2.interop;
import androidx.annotation.NonNull;
import androidx.camera.camera2.internal.Camera2CameraInfoImpl;
import androidx.camera.core.CameraInfo;
import androidx.core.util.Preconditions;
/**
* Provides ability to extract Camera2-related camera information from {@link CameraInfo}.
*/
@ExperimentalCamera2Interop
public final class Camera2CameraInfo {
/**
* Returns the string camera ID for this camera.
*
* <p>The camera ID is the same as the camera ID that would be obtained from
* {@link android.hardware.camera2.CameraManager#getCameraIdList()}.
*
* @param cameraInfo The {@link CameraInfo} to extract the camera ID from.
* @return the camera ID.
* @throws IllegalStateException if the camera info does not contain the camera 2 camera ID
* (e.g., if CameraX was not initialized with a {@link androidx.camera.camera2.Camera2Config}).
*/
@NonNull
public static String extractCameraId(@NonNull CameraInfo cameraInfo) {
Preconditions.checkState(cameraInfo instanceof Camera2CameraInfoImpl, "CameraInfo does "
+ "not contain any Camera2 information.");
Camera2CameraInfoImpl impl = (Camera2CameraInfoImpl) cameraInfo;
return impl.getCameraId();
}
// Should not be instantiated.
private Camera2CameraInfo() {}
}