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/*
* Copyright (C) 2021 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 android.hardware.camera2;
import android.annotation.IntDef;
import android.annotation.NonNull;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* <p>The CameraInjectionSession class is what determines when injection is active.</p>
*
* <p>Your application must declare the
* {@link android.Manifest.permission#CAMERA_INJECT_EXTERNAL_CAMERA CAMERA} permission in its
* manifest in order to use camera injection function.</p>
*
* @hide
* @see CameraManager#injectCamera
* @see android.Manifest.permission#CAMERA_INJECT_EXTERNAL_CAMERA
*/
public abstract class CameraInjectionSession implements AutoCloseable {
/**
* Close the external camera and switch back to the internal camera.
*
* <p>Call the method when app streaming stops or the app exits, it switch back to the internal
* camera.</p>
*/
@Override
public abstract void close();
/**
* A callback for external camera has a success or an error during injecting.
*
* <p>A callback instance must be provided to the {@link CameraManager#injectCamera} method to
* inject camera.</p>
*
* @hide
* @see CameraManager#injectCamera
*/
public abstract static class InjectionStatusCallback {
/**
* An error code that can be reported by {@link #onInjectionError} indicating that the
* camera injection session has encountered a fatal error.
*
* @see #onInjectionError
*/
public static final int ERROR_INJECTION_SESSION = 0;
/**
* An error code that can be reported by {@link #onInjectionError} indicating that the
* camera service has encountered a fatal error.
*
* <p>The Android device may need to be shut down and restarted to restore
* camera function, or there may be a persistent hardware problem.</p>
*
* <p>An attempt at recovery <i>may</i> be possible by closing the
* CameraDevice and the CameraManager, and trying to acquire all resources again from
* scratch.</p>
*
* @see #onInjectionError
*/
public static final int ERROR_INJECTION_SERVICE = 1;
/**
* An error code that can be reported by {@link #onInjectionError} indicating that the
* injection camera does not support certain camera functions. When this error occurs, the
* default processing is still in the inject state, and the app is notified to display an
* error message and a black screen.
*
* @see #onInjectionError
*/
public static final int ERROR_INJECTION_UNSUPPORTED = 2;
/**
* @hide
*/
@Retention(RetentionPolicy.SOURCE)
@IntDef(prefix = {"ERROR_"}, value =
{ERROR_INJECTION_SESSION,
ERROR_INJECTION_SERVICE,
ERROR_INJECTION_UNSUPPORTED})
public @interface ErrorCode {};
/**
* The method will be called when an external camera has been injected and replaced
* internal camera's feed.
*
* @param injectionSession The camera injection session that has been injected.
*/
public abstract void onInjectionSucceeded(
@NonNull CameraInjectionSession injectionSession);
/**
* The method will be called when an error occurs in the injected external camera.
*
* @param errorCode The error code.
* @see #ERROR_INJECTION_SESSION
* @see #ERROR_INJECTION_SERVICE
* @see #ERROR_INJECTION_UNSUPPORTED
*/
public abstract void onInjectionError(@NonNull int errorCode);
}
/**
* To be inherited by android.hardware.camera2.* code only.
*
* @hide
*/
public CameraInjectionSession() {
}
}
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