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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.gallery3d.filtershow.pipeline;
     18 
     19 import android.content.Context;
     20 import android.os.Handler;
     21 import android.os.HandlerThread;
     22 import android.os.Message;
     23 import android.util.Log;
     24 
     25 import java.util.HashMap;
     26 
     27 public class ProcessingTaskController implements Handler.Callback {
     28     private static final String LOGTAG = "ProcessingTaskController";
     29 
     30     private Context mContext;
     31     private HandlerThread mHandlerThread = null;
     32     private Handler mProcessingHandler = null;
     33     private int mCurrentType;
     34     private HashMap<Integer, ProcessingTask> mTasks = new HashMap<Integer, ProcessingTask>();
     35 
     36     public final static int RESULT = 1;
     37     public final static int UPDATE = 2;
     38 
     39     private final Handler mResultHandler = new Handler() {
     40         @Override
     41         public void handleMessage(Message msg) {
     42             ProcessingTask task = mTasks.get(msg.what);
     43             if (task != null) {
     44                 if (msg.arg1 == RESULT) {
     45                     task.onResult((ProcessingTask.Result) msg.obj);
     46                 } else if (msg.arg1 == UPDATE) {
     47                     task.onUpdate((ProcessingTask.Update) msg.obj);
     48                 } else {
     49                     Log.w(LOGTAG, "received unknown message! " + msg.arg1);
     50                 }
     51             }
     52         }
     53     };
     54 
     55     @Override
     56     public boolean handleMessage(Message msg) {
     57         ProcessingTask task = mTasks.get(msg.what);
     58         if (task != null) {
     59             task.processRequest((ProcessingTask.Request) msg.obj);
     60             return true;
     61         }
     62         return false;
     63     }
     64 
     65     public ProcessingTaskController(Context context) {
     66         mContext = context;
     67         mHandlerThread = new HandlerThread("ProcessingTaskController",
     68                 android.os.Process.THREAD_PRIORITY_FOREGROUND);
     69         mHandlerThread.start();
     70         mProcessingHandler = new Handler(mHandlerThread.getLooper(), this);
     71     }
     72 
     73     public Handler getProcessingHandler() {
     74         return mProcessingHandler;
     75     }
     76 
     77     public Handler getResultHandler() {
     78         return mResultHandler;
     79     }
     80 
     81     public int getReservedType() {
     82         return mCurrentType++;
     83     }
     84 
     85     public Context getContext() {
     86         return mContext;
     87     }
     88 
     89     public void add(ProcessingTask task) {
     90         task.added(this);
     91         mTasks.put(task.getType(), task);
     92     }
     93 
     94     public void quit() {
     95         mHandlerThread.quit();
     96     }
     97 }
     98