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/*
* Copyright (C) 2016 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.dialer.callcomposer.camera;
import android.content.Context;
import android.hardware.Camera;
import android.os.Parcelable;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import java.io.IOException;
/**
* A software rendered preview surface for the camera. This renders slower and causes more jank, so
* HardwareCameraPreview is preferred if possible.
*
* <p>There is a significant amount of duplication between HardwareCameraPreview and
* SoftwareCameraPreview which we can't easily share due to a lack of multiple inheritance, The
* implementations of the shared methods are delegated to CameraPreview
*/
public class SoftwareCameraPreview extends SurfaceView implements CameraPreview.CameraPreviewHost {
private final CameraPreview mPreview;
public SoftwareCameraPreview(final Context context) {
super(context);
mPreview = new CameraPreview(this);
getHolder()
.addCallback(
new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(final SurfaceHolder surfaceHolder) {
CameraManager.get().setSurface(mPreview);
}
@Override
public void surfaceChanged(
final SurfaceHolder surfaceHolder,
final int format,
final int width,
final int height) {
CameraManager.get().setSurface(mPreview);
}
@Override
public void surfaceDestroyed(final SurfaceHolder surfaceHolder) {
CameraManager.get().setSurface(null);
}
});
}
@Override
public void setShown() {
mPreview.setShown();
}
@Override
protected void onVisibilityChanged(final View changedView, final int visibility) {
super.onVisibilityChanged(changedView, visibility);
mPreview.onVisibilityChanged(visibility);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mPreview.onDetachedFromWindow();
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
mPreview.onAttachedToWindow();
}
@Override
protected void onRestoreInstanceState(final Parcelable state) {
super.onRestoreInstanceState(state);
mPreview.onRestoreInstanceState();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
widthMeasureSpec = mPreview.getWidthMeasureSpec(widthMeasureSpec, heightMeasureSpec);
heightMeasureSpec = mPreview.getHeightMeasureSpec(widthMeasureSpec, heightMeasureSpec);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
public View getView() {
return this;
}
@Override
public boolean isValid() {
return getHolder() != null;
}
@Override
public void startPreview(final Camera camera) throws IOException {
camera.setPreviewDisplay(getHolder());
}
@Override
public void onCameraPermissionGranted() {
mPreview.onCameraPermissionGranted();
}
}
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