1 /*
2  * Copyright (C) 2015 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 
17 package com.android.settings.biometrics.fingerprint;
18 
19 import android.content.ContentResolver;
20 import android.content.Context;
21 import android.content.res.Resources;
22 import android.graphics.SurfaceTexture;
23 import android.media.MediaPlayer;
24 import android.media.MediaPlayer.OnInfoListener;
25 import android.media.MediaPlayer.OnPreparedListener;
26 import android.net.Uri;
27 import android.util.AttributeSet;
28 import android.view.Surface;
29 import android.view.TextureView;
30 import android.view.View;
31 
32 import androidx.annotation.VisibleForTesting;
33 
34 import com.android.settings.R;
35 
36 /**
37  * A view containing a VideoView for showing the user how to enroll a fingerprint
38  */
39 public class FingerprintLocationAnimationVideoView extends TextureView
40         implements FingerprintFindSensorAnimation {
41     protected float mAspect = 1.0f; // initial guess until we know
42     protected MediaPlayer mMediaPlayer;
43 
FingerprintLocationAnimationVideoView(Context context, AttributeSet attrs)44     public FingerprintLocationAnimationVideoView(Context context, AttributeSet attrs) {
45         super(context, attrs);
46     }
47 
48     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)49     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
50         // Width is driven by measurespec, height is derrived from aspect ratio
51         int originalWidth = MeasureSpec.getSize(widthMeasureSpec);
52         int height = Math.round(mAspect * originalWidth);
53         super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
54     }
55 
getFingerprintLocationAnimation()56     protected Uri getFingerprintLocationAnimation() {
57         return resourceEntryToUri(getContext(), R.raw.fingerprint_location_animation);
58     }
59 
60     @Override
onFinishInflate()61     protected void onFinishInflate() {
62         super.onFinishInflate();
63         setSurfaceTextureListener(new SurfaceTextureListener() {
64             private SurfaceTexture mTextureToDestroy = null;
65 
66             @Override
67             public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width,
68                     int height) {
69                 setVisibility(View.INVISIBLE);
70                 Uri videoUri = getFingerprintLocationAnimation();
71                 if (mMediaPlayer != null) {
72                     mMediaPlayer.release();
73                 }
74                 if (mTextureToDestroy != null) {
75                     mTextureToDestroy.release();
76                     mTextureToDestroy = null;
77                 }
78                 mMediaPlayer = createMediaPlayer(mContext, videoUri);
79                 if (mMediaPlayer == null) {
80                     // MediaPlayer.create() method can return null
81                     return;
82                 }
83                 mMediaPlayer.setSurface(new Surface(surfaceTexture));
84                 mMediaPlayer.setOnPreparedListener(new OnPreparedListener() {
85                     @Override
86                     public void onPrepared(MediaPlayer mediaPlayer) {
87                         mediaPlayer.setLooping(true);
88                     }
89                 });
90                 mMediaPlayer.setOnInfoListener(new OnInfoListener() {
91                     @Override
92                     public boolean onInfo(MediaPlayer mediaPlayer, int what, int extra) {
93                         if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
94                             // Keep the view hidden until video starts
95                             setVisibility(View.VISIBLE);
96                         }
97                         return false;
98                     }
99                 });
100                 mAspect = (float) mMediaPlayer.getVideoHeight() / mMediaPlayer.getVideoWidth();
101                 requestLayout();
102                 startAnimation();
103             }
104 
105             @Override
106             public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture,
107                     int width, int height) {
108             }
109 
110             @Override
111             public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
112                 mTextureToDestroy = surfaceTexture;
113                 return false;
114             }
115 
116             @Override
117             public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
118             }
119         });
120     }
121 
122     @VisibleForTesting
createMediaPlayer(Context context, Uri videoUri)123     MediaPlayer createMediaPlayer(Context context, Uri videoUri) {
124         return MediaPlayer.create(mContext, videoUri);
125     }
126 
resourceEntryToUri(Context context, int id)127     protected static Uri resourceEntryToUri (Context context, int id) {
128         Resources res = context.getResources();
129         return Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" +
130                 res.getResourcePackageName(id) + '/' +
131                 res.getResourceTypeName(id) + '/' +
132                 res.getResourceEntryName(id));
133     }
134 
135     @Override
startAnimation()136     public void startAnimation() {
137         if (mMediaPlayer != null && !mMediaPlayer.isPlaying()) {
138             mMediaPlayer.start();
139         }
140     }
141 
142     @Override
stopAnimation()143     public void stopAnimation() {
144         if (mMediaPlayer != null) {
145             mMediaPlayer.stop();
146             mMediaPlayer.release();
147             mMediaPlayer = null;
148         }
149     }
150 
151     @Override
pauseAnimation()152     public void pauseAnimation() {
153         if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
154             mMediaPlayer.pause();
155         }
156     }
157 
158 }
159