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      1 /*
      2  * Copyright (C) 2014 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.ex.camera2.utils;
     18 
     19 import android.hardware.camera2.CameraCaptureSession;
     20 import android.hardware.camera2.CameraCaptureSession.CaptureCallback;
     21 import android.hardware.camera2.CaptureFailure;
     22 import android.hardware.camera2.CaptureRequest;
     23 import android.hardware.camera2.CaptureResult;
     24 import android.hardware.camera2.TotalCaptureResult;
     25 
     26 import java.util.Arrays;
     27 import java.util.LinkedList;
     28 import java.util.List;
     29 
     30 /**
     31  * Junction that allows notifying multiple {@link CaptureCallback}s whenever
     32  * the {@link CameraCaptureSession} posts a capture-related update.
     33  */
     34 public class Camera2CaptureCallbackSplitter extends CaptureCallback {
     35     private final List<CaptureCallback> mRecipients = new LinkedList<>();
     36 
     37     /**
     38      * @param recipients The listeners to notify. Any {@code null} passed here
     39      *                   will be completely ignored.
     40      */
     41     public Camera2CaptureCallbackSplitter(CaptureCallback... recipients) {
     42         for (CaptureCallback listener : recipients) {
     43             if (listener != null) {
     44                 mRecipients.add(listener);
     45             }
     46         }
     47     }
     48 
     49     @Override
     50     public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
     51                                    TotalCaptureResult result) {
     52         for (CaptureCallback target : mRecipients) {
     53             target.onCaptureCompleted(session, request, result);
     54         }
     55     }
     56 
     57     @Override
     58     public void onCaptureFailed(CameraCaptureSession session, CaptureRequest request,
     59                                 CaptureFailure failure) {
     60         for (CaptureCallback target : mRecipients) {
     61             target.onCaptureFailed(session, request, failure);
     62         }
     63     }
     64 
     65     @Override
     66     public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request,
     67                                     CaptureResult partialResult) {
     68         for (CaptureCallback target : mRecipients) {
     69             target.onCaptureProgressed(session, request, partialResult);
     70         }
     71     }
     72 
     73     @Override
     74     public void onCaptureSequenceAborted(CameraCaptureSession session, int sequenceId) {
     75         for (CaptureCallback target : mRecipients) {
     76             target.onCaptureSequenceAborted(session, sequenceId);
     77         }
     78     }
     79 
     80     @Override
     81     public void onCaptureSequenceCompleted(CameraCaptureSession session, int sequenceId,
     82                                            long frameNumber) {
     83         for (CaptureCallback target : mRecipients) {
     84             target.onCaptureSequenceCompleted(session, sequenceId, frameNumber);
     85         }
     86     }
     87 
     88     @Override
     89     public void onCaptureStarted(CameraCaptureSession session, CaptureRequest request,
     90                                  long timestamp, long frameNumber) {
     91         for (CaptureCallback target : mRecipients) {
     92             target.onCaptureStarted(session, request, timestamp, frameNumber);
     93         }
     94     }
     95 }
     96