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      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 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "SoundPoolThread"
     19 #include "utils/Log.h"
     20 
     21 #include "SoundPoolThread.h"
     22 
     23 namespace android {
     24 
     25 void SoundPoolThread::write(SoundPoolMsg msg) {
     26     Mutex::Autolock lock(&mLock);
     27     while (mMsgQueue.size() >= maxMessages) {
     28         mCondition.wait(mLock);
     29     }
     30 
     31     // if thread is quitting, don't add to queue
     32     if (mRunning) {
     33         mMsgQueue.push(msg);
     34         mCondition.signal();
     35     }
     36 }
     37 
     38 const SoundPoolMsg SoundPoolThread::read() {
     39     Mutex::Autolock lock(&mLock);
     40     while (mMsgQueue.size() == 0) {
     41         mCondition.wait(mLock);
     42     }
     43     SoundPoolMsg msg = mMsgQueue[0];
     44     mMsgQueue.removeAt(0);
     45     mCondition.signal();
     46     return msg;
     47 }
     48 
     49 void SoundPoolThread::quit() {
     50     Mutex::Autolock lock(&mLock);
     51     if (mRunning) {
     52         mRunning = false;
     53         mMsgQueue.clear();
     54         mMsgQueue.push(SoundPoolMsg(SoundPoolMsg::KILL, 0));
     55         mCondition.signal();
     56         mCondition.wait(mLock);
     57     }
     58     ALOGV("return from quit");
     59 }
     60 
     61 SoundPoolThread::SoundPoolThread(SoundPool* soundPool) :
     62     mSoundPool(soundPool)
     63 {
     64     mMsgQueue.setCapacity(maxMessages);
     65     if (createThreadEtc(beginThread, this, "SoundPoolThread")) {
     66         mRunning = true;
     67     }
     68 }
     69 
     70 SoundPoolThread::~SoundPoolThread()
     71 {
     72     quit();
     73 }
     74 
     75 int SoundPoolThread::beginThread(void* arg) {
     76     ALOGV("beginThread");
     77     SoundPoolThread* soundPoolThread = (SoundPoolThread*)arg;
     78     return soundPoolThread->run();
     79 }
     80 
     81 int SoundPoolThread::run() {
     82     ALOGV("run");
     83     for (;;) {
     84         SoundPoolMsg msg = read();
     85         ALOGV("Got message m=%d, mData=%d", msg.mMessageType, msg.mData);
     86         switch (msg.mMessageType) {
     87         case SoundPoolMsg::KILL:
     88             ALOGV("goodbye");
     89             return NO_ERROR;
     90         case SoundPoolMsg::LOAD_SAMPLE:
     91             doLoadSample(msg.mData);
     92             break;
     93         default:
     94             ALOGW("run: Unrecognized message %d\n",
     95                     msg.mMessageType);
     96             break;
     97         }
     98     }
     99 }
    100 
    101 void SoundPoolThread::loadSample(int sampleID) {
    102     write(SoundPoolMsg(SoundPoolMsg::LOAD_SAMPLE, sampleID));
    103 }
    104 
    105 void SoundPoolThread::doLoadSample(int sampleID) {
    106     sp <Sample> sample = mSoundPool->findSample(sampleID);
    107     status_t status = -1;
    108     if (sample != 0) {
    109         status = sample->doLoad();
    110     }
    111     mSoundPool->notify(SoundPoolEvent(SoundPoolEvent::SAMPLE_LOADED, sampleID, status));
    112 }
    113 
    114 } // end namespace android
    115