1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dialer.callcomposer.cameraui;
18
19import android.content.Context;
20import android.graphics.Canvas;
21import android.hardware.Camera;
22import android.os.Bundle;
23import android.os.Parcelable;
24import android.util.AttributeSet;
25import android.view.ViewGroup;
26import android.widget.FrameLayout;
27import com.android.dialer.callcomposer.camera.CameraManager;
28import com.android.dialer.callcomposer.camera.HardwareCameraPreview;
29import com.android.dialer.callcomposer.camera.SoftwareCameraPreview;
30import com.android.dialer.common.LogUtil;
31
32/** Used to display the view of the camera. */
33public class CameraMediaChooserView extends FrameLayout {
34  private static final String STATE_CAMERA_INDEX = "camera_index";
35  private static final String STATE_SUPER = "super";
36
37  // True if we have at least queued an update to the view tree to support software rendering
38  // fallback
39  private boolean isSoftwareFallbackActive;
40
41  public CameraMediaChooserView(final Context context, final AttributeSet attrs) {
42    super(context, attrs);
43  }
44
45  @Override
46  protected Parcelable onSaveInstanceState() {
47    final Bundle bundle = new Bundle();
48    bundle.putParcelable(STATE_SUPER, super.onSaveInstanceState());
49    final int cameraIndex = CameraManager.get().getCameraIndex();
50    LogUtil.i("CameraMediaChooserView.onSaveInstanceState", "saving camera index:" + cameraIndex);
51    bundle.putInt(STATE_CAMERA_INDEX, cameraIndex);
52    return bundle;
53  }
54
55  @Override
56  protected void onRestoreInstanceState(final Parcelable state) {
57    if (!(state instanceof Bundle)) {
58      return;
59    }
60
61    final Bundle bundle = (Bundle) state;
62    final int cameraIndex = bundle.getInt(STATE_CAMERA_INDEX);
63    super.onRestoreInstanceState(bundle.getParcelable(STATE_SUPER));
64
65    LogUtil.i(
66        "CameraMediaChooserView.onRestoreInstanceState", "restoring camera index:" + cameraIndex);
67    if (cameraIndex != -1) {
68      CameraManager.get().selectCameraByIndex(cameraIndex);
69    } else {
70      resetState();
71    }
72  }
73
74  public void resetState() {
75    CameraManager.get().selectCamera(Camera.CameraInfo.CAMERA_FACING_BACK);
76  }
77
78  @Override
79  protected void onDraw(final Canvas canvas) {
80    super.onDraw(canvas);
81    // If the canvas isn't hardware accelerated, we have to replace the HardwareCameraPreview
82    // with a SoftwareCameraPreview which supports software rendering
83    if (!canvas.isHardwareAccelerated() && !isSoftwareFallbackActive) {
84      isSoftwareFallbackActive = true;
85      // Post modifying the tree since we can't modify the view tree during a draw pass
86      post(
87          new Runnable() {
88            @Override
89            public void run() {
90              final HardwareCameraPreview cameraPreview =
91                  (HardwareCameraPreview) findViewById(R.id.camera_preview);
92              if (cameraPreview == null) {
93                return;
94              }
95              final ViewGroup parent = ((ViewGroup) cameraPreview.getParent());
96              final int index = parent.indexOfChild(cameraPreview);
97              final SoftwareCameraPreview softwareCameraPreview =
98                  new SoftwareCameraPreview(getContext());
99              // Be sure to remove the hardware view before adding the software view to
100              // prevent having 2 camera previews active at the same time
101              parent.removeView(cameraPreview);
102              parent.addView(softwareCameraPreview, index);
103            }
104          });
105    }
106  }
107}
108