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.camera; 18 19import android.content.Context; 20import android.graphics.SurfaceTexture; 21import android.hardware.Camera; 22import android.os.Parcelable; 23import android.util.AttributeSet; 24import android.view.TextureView; 25import android.view.View; 26import java.io.IOException; 27 28/** 29 * A hardware accelerated preview texture for the camera. This is the preferred CameraPreview 30 * because it animates smoother. When hardware acceleration isn't available, SoftwareCameraPreview 31 * is used. 32 * 33 * <p>There is a significant amount of duplication between HardwareCameraPreview and 34 * SoftwareCameraPreview which we can't easily share due to a lack of multiple inheritance, The 35 * implementations of the shared methods are delegated to CameraPreview 36 */ 37public class HardwareCameraPreview extends TextureView implements CameraPreview.CameraPreviewHost { 38 private CameraPreview mPreview; 39 40 public HardwareCameraPreview(final Context context, final AttributeSet attrs) { 41 super(context, attrs); 42 mPreview = new CameraPreview(this); 43 setSurfaceTextureListener( 44 new SurfaceTextureListener() { 45 @Override 46 public void onSurfaceTextureAvailable( 47 final SurfaceTexture surfaceTexture, final int i, final int i2) { 48 CameraManager.get().setSurface(mPreview); 49 } 50 51 @Override 52 public void onSurfaceTextureSizeChanged( 53 final SurfaceTexture surfaceTexture, final int i, final int i2) { 54 CameraManager.get().setSurface(mPreview); 55 } 56 57 @Override 58 public boolean onSurfaceTextureDestroyed(final SurfaceTexture surfaceTexture) { 59 CameraManager.get().setSurface(null); 60 return true; 61 } 62 63 @Override 64 public void onSurfaceTextureUpdated(final SurfaceTexture surfaceTexture) { 65 CameraManager.get().setSurface(mPreview); 66 } 67 }); 68 } 69 70 @Override 71 public void setShown() { 72 mPreview.setShown(); 73 } 74 75 @Override 76 protected void onVisibilityChanged(final View changedView, final int visibility) { 77 super.onVisibilityChanged(changedView, visibility); 78 mPreview.onVisibilityChanged(visibility); 79 } 80 81 @Override 82 protected void onDetachedFromWindow() { 83 super.onDetachedFromWindow(); 84 mPreview.onDetachedFromWindow(); 85 } 86 87 @Override 88 protected void onAttachedToWindow() { 89 super.onAttachedToWindow(); 90 mPreview.onAttachedToWindow(); 91 } 92 93 @Override 94 protected void onRestoreInstanceState(final Parcelable state) { 95 super.onRestoreInstanceState(state); 96 mPreview.onRestoreInstanceState(); 97 } 98 99 @Override 100 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 101 widthMeasureSpec = mPreview.getWidthMeasureSpec(widthMeasureSpec, heightMeasureSpec); 102 heightMeasureSpec = mPreview.getHeightMeasureSpec(widthMeasureSpec, heightMeasureSpec); 103 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 104 } 105 106 @Override 107 public View getView() { 108 return this; 109 } 110 111 @Override 112 public boolean isValid() { 113 return getSurfaceTexture() != null; 114 } 115 116 @Override 117 public void startPreview(final Camera camera) throws IOException { 118 camera.setPreviewTexture(getSurfaceTexture()); 119 } 120 121 @Override 122 public void onCameraPermissionGranted() { 123 mPreview.onCameraPermissionGranted(); 124 } 125} 126