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/*
* Copyright (C) 2014 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 com.android.camera.one.v2.common;
import java.util.HashSet;
import java.util.Set;
import android.content.Context;
import android.view.Surface;
import com.android.camera.async.Listenable;
import com.android.camera.async.SafeCloseable;
import com.android.camera.async.Updatable;
import com.android.camera.one.OneCamera;
import com.android.camera.one.v2.AutoFocusHelper;
import com.android.camera.session.CaptureSession;
import com.android.camera.util.Callback;
import com.android.camera.util.ScopedFactory;
import com.android.camera.util.Size;
/**
* A generic, composable {@link OneCamera}.
* <p>
* Note: This implementation assumes that these four methods are invoked in
* sequences matching the following regex:
* <p>
* startPreview (takePicture | triggerFocusAndMeterAtPoint)* close
* <p>
* All other methods may be called at any time.
*/
public class GenericOneCameraImpl implements OneCamera {
public interface ManualAutoFocus {
/**
* @See {@link OneCamera#triggerFocusAndMeterAtPoint}
*/
void triggerFocusAndMeterAtPoint(float nx, float ny);
}
public interface PictureTaker {
/**
* @See {@link OneCamera#takePicture}
*/
public void takePicture(OneCamera.PhotoCaptureParameters params, CaptureSession session);
}
private final Set<SafeCloseable> mCloseListeners;
private final PictureTaker mPictureTaker;
private final ManualAutoFocus mManualAutoFocus;
private final Listenable<Integer> mAFStateListenable;
private final Listenable<Boolean> mReadyStateListenable;
private final float mMaxZoom;
private final Updatable<Float> mZoom;
private final Size[] mSupportedPreviewSizes;
private final float mFullSizeAspectRatio;
private final Facing mDirection;
private final PreviewSizeSelector mPreviewSizeSelector;
private final Listenable<Boolean> mPreviewStartSuccessListenable;
private final ScopedFactory<Surface, Runnable> mPreviewScopeEntrance;
public GenericOneCameraImpl(Set<SafeCloseable> closeListeners, PictureTaker pictureTaker,
ManualAutoFocus manualAutoFocus, Listenable<Integer> afStateProvider,
Listenable<Boolean> readyStateListenable, float maxZoom, Updatable<Float> zoom,
Size[] supportedPreviewSizes, float fullSizeAspectRatio, Facing direction,
PreviewSizeSelector previewSizeSelector,
Listenable<Boolean> previewStartSuccessListenable,
ScopedFactory<Surface, Runnable> previewScopeEntrance) {
mPreviewStartSuccessListenable = previewStartSuccessListenable;
mPreviewScopeEntrance = previewScopeEntrance;
mCloseListeners = new HashSet<>(closeListeners);
mMaxZoom = maxZoom;
mSupportedPreviewSizes = supportedPreviewSizes;
mFullSizeAspectRatio = fullSizeAspectRatio;
mDirection = direction;
mPreviewSizeSelector = previewSizeSelector;
mPictureTaker = pictureTaker;
mManualAutoFocus = manualAutoFocus;
mAFStateListenable = afStateProvider;
mReadyStateListenable = readyStateListenable;
mZoom = zoom;
}
@Override
public void triggerFocusAndMeterAtPoint(float nx, float ny) {
mManualAutoFocus.triggerFocusAndMeterAtPoint(nx, ny);
}
@Override
public void takePicture(PhotoCaptureParameters params, CaptureSession session) {
mPictureTaker.takePicture(params, session);
}
@Override
public void startBurst(BurstParameters params, CaptureSession session) {
// TODO delete from OneCamera interface
}
@Override
public void stopBurst() {
// TODO delete from OneCamera interface
}
@Override
public void setFocusStateListener(final FocusStateListener listener) {
mAFStateListenable.setCallback(new Callback<Integer>() {
@Override
public void onCallback(Integer afState) {
// TODO delete frameNumber from FocusStateListener callback. It
// is optional and never actually used.
long frameNumber = -1;
listener.onFocusStatusUpdate(AutoFocusHelper.stateFromCamera2State(afState),
frameNumber);
}
});
}
@Override
public void setReadyStateChangedListener(final ReadyStateChangedListener listener) {
mReadyStateListenable.setCallback(new Callback<Boolean>() {
@Override
public void onCallback(Boolean result) {
listener.onReadyStateChanged(result);
}
});
}
@Override
public void startPreview(Surface surface, final CaptureReadyCallback listener) {
mPreviewStartSuccessListenable.setCallback(new Callback<Boolean>() {
@Override
public void onCallback(Boolean success) {
if (success) {
listener.onReadyForCapture();
} else {
listener.onSetupFailed();
}
}
});
mPreviewScopeEntrance.get(surface).run();
}
@Override
public void close(CloseCallback closeCallback) {
// TODO Remove CloseCallback from the interface. It is always null.
for (SafeCloseable listener : mCloseListeners) {
listener.close();
}
}
@Override
public Size[] getSupportedPreviewSizes() {
return mSupportedPreviewSizes;
}
@Override
public float getFullSizeAspectRatio() {
return mFullSizeAspectRatio;
}
@Override
public Facing getDirection() {
return mDirection;
}
@Override
public float getMaxZoom() {
return mMaxZoom;
}
@Override
public void setZoom(float zoom) {
mZoom.update(zoom);
}
@Override
public Size pickPreviewSize(Size pictureSize, Context context) {
return mPreviewSizeSelector.pickPreviewSize(pictureSize, context);
}
}
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