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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.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.TextureView;
import android.view.View;
import java.io.IOException;
/**
* A hardware accelerated preview texture for the camera. This is the preferred CameraPreview
* because it animates smoother. When hardware acceleration isn't available, SoftwareCameraPreview
* is used.
*
* <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 HardwareCameraPreview extends TextureView implements CameraPreview.CameraPreviewHost {
private CameraPreview mPreview;
public HardwareCameraPreview(final Context context, final AttributeSet attrs) {
super(context, attrs);
mPreview = new CameraPreview(this);
setSurfaceTextureListener(
new SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(
final SurfaceTexture surfaceTexture, final int i, final int i2) {
CameraManager.get().setSurface(mPreview);
}
@Override
public void onSurfaceTextureSizeChanged(
final SurfaceTexture surfaceTexture, final int i, final int i2) {
CameraManager.get().setSurface(mPreview);
}
@Override
public boolean onSurfaceTextureDestroyed(final SurfaceTexture surfaceTexture) {
CameraManager.get().setSurface(null);
return true;
}
@Override
public void onSurfaceTextureUpdated(final SurfaceTexture surfaceTexture) {
CameraManager.get().setSurface(mPreview);
}
});
}
@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 getSurfaceTexture() != null;
}
@Override
public void startPreview(final Camera camera) throws IOException {
camera.setPreviewTexture(getSurfaceTexture());
}
@Override
public void onCameraPermissionGranted() {
mPreview.onCameraPermissionGranted();
}
}
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