| /* |
| * Copyright (C) 2013 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.cts.verifier.sensors; |
| |
| // ---------------------------------------------------------------------- |
| |
| import android.content.Context; |
| import android.hardware.Camera; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.SurfaceHolder; |
| import android.view.SurfaceView; |
| import android.view.ViewGroup; |
| |
| import java.io.IOException; |
| |
| /** Camera preview class */ |
| public class RVCVCameraPreview extends SurfaceView implements SurfaceHolder.Callback { |
| private static final String TAG = "RVCVCameraPreview"; |
| private static final boolean LOCAL_LOGD = true; |
| |
| private SurfaceHolder mHolder; |
| private Camera mCamera; |
| private float mAspect; |
| private int mRotation; |
| |
| /** |
| * Constructor |
| * @param context Activity context |
| */ |
| public RVCVCameraPreview(Context context) { |
| super(context); |
| mCamera = null; |
| initSurface(); |
| } |
| |
| /** |
| * Constructor |
| * @param context Activity context |
| * @param attrs |
| */ |
| public RVCVCameraPreview(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public void init(Camera camera, float aspectRatio, int rotation) { |
| this.mCamera = camera; |
| mAspect = aspectRatio; |
| mRotation = rotation; |
| initSurface(); |
| } |
| |
| private void initSurface() { |
| // Install a SurfaceHolder.Callback so we get notified when the |
| // underlying surface is created and destroyed. |
| mHolder = getHolder(); |
| mHolder.addCallback(this); |
| |
| // deprecated |
| // TODO: update this code to match new API level. |
| mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); |
| } |
| |
| /** |
| * SurfaceHolder.Callback |
| * Surface is created, it is OK to start the camera preview now. |
| */ |
| public void surfaceCreated(SurfaceHolder holder) { |
| // The Surface has been created, now tell the camera where to draw the preview. |
| |
| if (mCamera == null) { |
| // preview camera does not exist |
| return; |
| } |
| |
| try { |
| mCamera.setPreviewDisplay(holder); |
| mCamera.startPreview(); |
| int v_height = getHeight(); |
| int v_width = getWidth(); |
| ViewGroup.LayoutParams layout = getLayoutParams(); |
| if ( (float)v_height/v_width > |
| mAspect) { |
| layout.height = (int)(v_width * mAspect); |
| layout.width = v_width; |
| }else { |
| layout.width = (int)(v_height / mAspect); |
| layout.height = v_height; |
| } |
| Log.d(TAG, String.format("Layout (%d, %d) -> (%d, %d)", v_width, v_height, |
| layout.width, layout.height)); |
| setLayoutParams(layout); |
| } catch (IOException e) { |
| if (LOCAL_LOGD) Log.d(TAG, "Error when starting camera preview: " + e.getMessage()); |
| } |
| } |
| /** |
| * SurfaceHolder.Callback |
| */ |
| public void surfaceDestroyed(SurfaceHolder holder) { |
| // empty. Take care of releasing the Camera preview in your activity. |
| } |
| |
| /** |
| * SurfaceHolder.Callback |
| * Restart camera preview if surface changed |
| */ |
| public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { |
| |
| if (mHolder.getSurface() == null || mCamera == null){ |
| // preview surface or camera does not exist |
| return; |
| } |
| |
| // stop preview before making changes |
| mCamera.stopPreview(); |
| |
| mCamera.setDisplayOrientation(mRotation); |
| |
| //do the same as if it is created again |
| surfaceCreated(holder); |
| } |
| } |