1 /*
2  * Copyright (C) 2007 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 #ifndef SOUNDPOOLTHREAD_H_
18 #define SOUNDPOOLTHREAD_H_
19 
20 #include <utils/threads.h>
21 #include <utils/Vector.h>
22 #include <media/AudioTrack.h>
23 
24 #include "SoundPool.h"
25 
26 namespace android {
27 
28 class SoundPoolMsg {
29 public:
30     enum MessageType { INVALID, KILL, LOAD_SAMPLE };
SoundPoolMsg()31     SoundPoolMsg() : mMessageType(INVALID), mData(0) {}
SoundPoolMsg(MessageType MessageType,int data)32     SoundPoolMsg(MessageType MessageType, int data) :
33         mMessageType(MessageType), mData(data) {}
34     uint16_t         mMessageType;
35     uint16_t         mData;
36 };
37 
38 /*
39  * This class handles background requests from the SoundPool
40  */
41 class SoundPoolThread {
42 public:
43     explicit SoundPoolThread(SoundPool* SoundPool);
44     ~SoundPoolThread();
45     void loadSample(int sampleID);
46     void quit();
47     void write(SoundPoolMsg msg);
48 
49 private:
50     static const size_t maxMessages = 128;
51 
52     static int beginThread(void* arg);
53     int run();
54     void doLoadSample(int sampleID);
55     const SoundPoolMsg read();
56 
57     Mutex                   mLock;
58     Condition               mCondition;
59     Vector<SoundPoolMsg>    mMsgQueue;
60     SoundPool*              mSoundPool;
61     bool                    mRunning;
62 };
63 
64 } // end namespace android
65 
66 #endif /*SOUNDPOOLTHREAD_H_*/
67