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      1 /*
      2  * Copyright (C) 2013 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.camera.app;
     18 
     19 import android.hardware.Camera;
     20 import android.os.Handler;
     21 
     22 import com.android.ex.camera2.portability.CameraDeviceInfo.Characteristics;
     23 import com.android.ex.camera2.portability.CameraExceptionHandler;
     24 
     25 /**
     26  * An interface which defines the camera provider.
     27  */
     28 public interface CameraProvider {
     29 
     30     /**
     31      * Requests the camera device. If the camera device of the same ID is
     32      * already requested, then no-op here.
     33      *
     34      * @param id The ID of the requested camera device.
     35      */
     36     public void requestCamera(int id);
     37 
     38     /**
     39      * Requests the camera device. If the camera device of the same ID is
     40      * already requested, then no-op here.
     41      *
     42      * @param id The ID of the requested camera device.
     43      * @param useNewApi Whether to use the new API if this platform provides it.
     44      */
     45     public void requestCamera(int id, boolean useNewApi);
     46 
     47     public boolean waitingForCamera();
     48 
     49     /**
     50      * Releases the camera device.
     51      *
     52      * @param id The camera ID.
     53      */
     54     public void releaseCamera(int id);
     55 
     56     /**
     57      * Sets a callback for handling camera api runtime exceptions on
     58      * a handler.
     59      */
     60     public void setCameraExceptionHandler(CameraExceptionHandler exceptionHandler);
     61 
     62     /**
     63      * Get the {@link Characteristics} of the given camera.
     64      *
     65      * @param cameraId Which camera.
     66      * @return The static characteristics of that camera.
     67      */
     68     public Characteristics getCharacteristics(int cameraId);
     69 
     70     /**
     71      * @returns The current camera id.
     72      */
     73     public int getCurrentCameraId();
     74 
     75     /**
     76      * Returns the total number of cameras available on the device.
     77      */
     78     public int getNumberOfCameras();
     79 
     80     /**
     81      * @returns The lowest ID of the back camera or -1 if not available.
     82      */
     83     public int getFirstBackCameraId();
     84 
     85     /**
     86      * @return The lowest ID of the front camera or -1 if not available.
     87      */
     88     public int getFirstFrontCameraId();
     89 
     90     /**
     91      * @returns Whether the camera is facing front.
     92      */
     93     public boolean isFrontFacingCamera(int id);
     94 
     95     /**
     96      * @returns Whether the camera is facing back.
     97      */
     98     public boolean isBackFacingCamera(int id);
     99 }
    100