CameraControlInternal.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.core.impl;
import static androidx.camera.core.ImageCapture.FLASH_MODE_OFF;
import android.graphics.Rect;
import androidx.annotation.NonNull;
import androidx.camera.core.CameraControl;
import androidx.camera.core.FocusMeteringAction;
import androidx.camera.core.FocusMeteringResult;
import androidx.camera.core.ImageCapture.FlashMode;
import androidx.camera.core.impl.utils.futures.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
/**
* The CameraControlInternal Interface.
*
* <p>CameraControlInternal is used for global camera operations like zoom, focus, flash and
* triggering
* AF/AE.
*/
public interface CameraControlInternal extends CameraControl {
/** Returns the current flash mode. */
@FlashMode
int getFlashMode();
/**
* Sets current flash mode
*
* @param flashMode the {@link FlashMode}.
*/
void setFlashMode(@FlashMode int flashMode);
/**
* Performs a AF trigger.
*
* @return a {@link ListenableFuture} which completes when the request is completed.
* Cancelling the ListenableFuture is a no-op.
*/
@NonNull
ListenableFuture<CameraCaptureResult> triggerAf();
/**
* Performs a AE Precapture trigger.
*
* @return a {@link ListenableFuture} which completes when the request is completed.
* Cancelling the ListenableFuture is a no-op.
*/
@NonNull
ListenableFuture<CameraCaptureResult> triggerAePrecapture();
/** Cancel AF trigger AND/OR AE Precapture trigger.* */
void cancelAfAeTrigger(boolean cancelAfTrigger, boolean cancelAePrecaptureTrigger);
/**
* Set a exposure compensation to the camera
*
* @param exposure the exposure compensation value to set
* @return a ListenableFuture which is completed when the new exposure compensation reach the
* target.
*/
@NonNull
@Override
ListenableFuture<Integer> setExposureCompensationIndex(int exposure);
/**
* Performs capture requests.
*/
void submitCaptureRequests(@NonNull List<CaptureConfig> captureConfigs);
/**
* Gets the current SessionConfig.
*
* <p>When the SessionConfig is changed,
* {@link ControlUpdateCallback#onCameraControlUpdateSessionConfig()} will be called to
* notify the change.
*/
@NonNull
SessionConfig getSessionConfig();
/**
* Gets the full sensor rect.
*/
@NonNull
Rect getSensorRect();
/**
* Adds the Interop configuration.
*/
void addInteropConfig(@NonNull Config config);
/**
* Clears the Interop configuration set previously.
*/
void clearInteropConfig();
/**
* Gets the Interop configuration.
*/
@NonNull
Config getInteropConfig();
CameraControlInternal DEFAULT_EMPTY_INSTANCE = new CameraControlInternal() {
@FlashMode
@Override
public int getFlashMode() {
return FLASH_MODE_OFF;
}
@Override
public void setFlashMode(@FlashMode int flashMode) {
}
@NonNull
@Override
public ListenableFuture<Void> enableTorch(boolean torch) {
return Futures.immediateFuture(null);
}
@Override
@NonNull
public ListenableFuture<CameraCaptureResult> triggerAf() {
return Futures.immediateFuture(CameraCaptureResult.EmptyCameraCaptureResult.create());
}
@Override
@NonNull
public ListenableFuture<CameraCaptureResult> triggerAePrecapture() {
return Futures.immediateFuture(CameraCaptureResult.EmptyCameraCaptureResult.create());
}
@Override
public void cancelAfAeTrigger(boolean cancelAfTrigger, boolean cancelAePrecaptureTrigger) {
}
@NonNull
@Override
public ListenableFuture<Integer> setExposureCompensationIndex(int exposure) {
return Futures.immediateFuture(0);
}
@Override
public void submitCaptureRequests(@NonNull List<CaptureConfig> captureConfigs) {
}
@NonNull
@Override
public SessionConfig getSessionConfig() {
return SessionConfig.defaultEmptySessionConfig();
}
@NonNull
@Override
public Rect getSensorRect() {
return new Rect();
}
@NonNull
@Override
public ListenableFuture<FocusMeteringResult> startFocusAndMetering(
@NonNull FocusMeteringAction action) {
return Futures.immediateFuture(FocusMeteringResult.emptyInstance());
}
@NonNull
@Override
public ListenableFuture<Void> cancelFocusAndMetering() {
return Futures.immediateFuture(null);
}
@NonNull
@Override
public ListenableFuture<Void> setZoomRatio(float ratio) {
return Futures.immediateFuture(null);
}
@NonNull
@Override
public ListenableFuture<Void> setLinearZoom(float linearZoom) {
return Futures.immediateFuture(null);
}
@Override
public void addInteropConfig(@NonNull Config config) {
}
@Override
public void clearInteropConfig() {
}
@NonNull
@Override
public Config getInteropConfig() {
return null;
}
};
/** Listener called when CameraControlInternal need to notify event. */
interface ControlUpdateCallback {
/**
* Called when CameraControlInternal has updated session configuration.
*
* <p>The latest SessionConfig can be obtained by calling {@link #getSessionConfig()}.
*/
void onCameraControlUpdateSessionConfig();
/** Called when CameraControlInternal need to send capture requests. */
void onCameraControlCaptureRequests(@NonNull List<CaptureConfig> captureConfigs);
}
/**
* An exception thrown when the camera control is failed to execute the request.
*/
final class CameraControlException extends Exception {
@NonNull
private CameraCaptureFailure mCameraCaptureFailure;
public CameraControlException(@NonNull CameraCaptureFailure failure) {
super();
mCameraCaptureFailure = failure;
}
public CameraControlException(@NonNull CameraCaptureFailure failure,
@NonNull Throwable cause) {
super(cause);
mCameraCaptureFailure = failure;
}
@NonNull
public CameraCaptureFailure getCameraCaptureFailure() {
return mCameraCaptureFailure;
}
}
}