AudioEngine:support preload for audio[WIN32/WINRT 8.1/WP8.1]

cocos/audio/AudioEngine.cpp

@@ -415,4 +415,18 @@ AudioProfile* AudioEngine::getProfile(const std::string &name)
     }
 }
 
+void AudioEngine::preload(const std::string& filePath)
+{
+    lazyInit();
+
+    if (_audioEngineImpl)
+    {
+        if (!FileUtils::getInstance()->isFileExist(filePath)){
+            return;
+        }
+
+        _audioEngineImpl->preload(filePath);
+    }
+}
+
 #endif

cocos/audio/include/AudioEngine.h

@@ -281,6 +281,12 @@ public:
      */
     static AudioProfile* getProfile(const std::string &profileName);
 
+    /**
+    * Preload audio file.
+    * @param filePath The file path of an audio.
+    */
+    static void preload(const std::string& filePath);
+
 protected:
     
     static void remove(int audioID);

cocos/audio/win32/AudioEngine-win32.cpp

@@ -47,15 +47,18 @@ static ALCdevice *s_ALDevice = nullptr;
 static ALCcontext *s_ALContext = nullptr;
 static bool MPG123_LAZYINIT = true;
 
+static AudioEngineThreadPool* s_threadPool = nullptr;
+
 namespace cocos2d {
     namespace experimental {
         class AudioEngineThreadPool
         {
         public:
             AudioEngineThreadPool()
-            : _running(true)
+            : _numThread(6)
-            , _numThread(6)
             {
+                s_threadPool = this;
+
                 _threads.reserve(_numThread);
                 _tasks.reserve(_numThread);
                 
@@ -88,21 +91,17 @@ namespace cocos2d {
             
             void destroy()
             {
-                _running = false;
+                std::unique_lock<std::mutex> lk(_sleepMutex);
                 _sleepCondition.notify_all();
+            }
 
-                for (int index = 0; index < _numThread; ++index) {
-                    _threads[index].join();
-                }
-            }           
         private:
-            bool _running;
             std::vector<std::thread>  _threads;
             std::vector< std::function<void ()> > _tasks;
             
             void threadFunc(int index)
             {
-                while (_running) {
+                while (s_threadPool == this) {
                     std::function<void ()> task = nullptr;
                     _taskMutex.lock();
                     task = _tasks[index];
@@ -194,6 +193,54 @@ bool AudioEngineImpl::init()
     return ret;
 }
 
+AudioCache* AudioEngineImpl::preload(const std::string& filePath)
+{
+    AudioCache* audioCache = nullptr;
+
+    do 
+    {
+        auto it = _audioCaches.find(filePath);
+        if (it != _audioCaches.end())
+        {
+            audioCache = &it->second;
+            break;
+        }
+
+        auto ext = strchr(filePath.c_str(), '.');
+        AudioCache::FileFormat fileFormat = AudioCache::FileFormat::UNKNOWN;
+
+        if (_stricmp(ext, ".ogg") == 0){
+            fileFormat = AudioCache::FileFormat::OGG;
+        }
+        else if (_stricmp(ext, ".mp3") == 0){
+            fileFormat = AudioCache::FileFormat::MP3;
+
+            if (MPG123_LAZYINIT){
+                auto error = mpg123_init();
+                if (error == MPG123_OK){
+                    MPG123_LAZYINIT = false;
+                }
+                else{
+                    log("Basic setup goes wrong: %s", mpg123_plain_strerror(error));
+                    break;
+                }
+            }
+        }
+        else{
+            log("unsupported media type:%s\n", ext);
+            break;
+        }
+
+        audioCache = &_audioCaches[filePath];
+        audioCache->_fileFormat = fileFormat;
+
+        audioCache->_fileFullPath = FileUtils::getInstance()->fullPathForFilename(filePath);
+        _threadPool->addTask(std::bind(&AudioCache::readDataTask, audioCache));
+    } while (false);
+
+    return audioCache;
+}
+
 int AudioEngineImpl::play2d(const std::string &filePath ,bool loop ,float volume)
 {
     bool availableSourceExist = false;
@@ -209,50 +256,12 @@ int AudioEngineImpl::play2d(const std::string &filePath ,bool loop ,float volume
         return AudioEngine::INVALID_AUDIO_ID;
     }
     
-    AudioCache* audioCache = nullptr;
+    AudioCache* audioCache = preload(filePath);
-    auto it = _audioCaches.find(filePath);
+    if (audioCache == nullptr)
-    if (it == _audioCaches.end()) {
+    {
-        audioCache = &_audioCaches[filePath];
-        auto ext = strchr(filePath.c_str(), '.');
-        bool eraseCache = true;
-
-        if (_stricmp(ext, ".ogg") == 0){
-            audioCache->_fileFormat = AudioCache::FileFormat::OGG;
-            eraseCache = false;
-        }
-        else if (_stricmp(ext, ".mp3") == 0){
-            audioCache->_fileFormat = AudioCache::FileFormat::MP3;
-
-            if (MPG123_LAZYINIT){
-                auto error = mpg123_init();
-                if(error == MPG123_OK){
-                    MPG123_LAZYINIT = false;
-                    eraseCache = false;
-                }
-                else{
-                    log("Basic setup goes wrong: %s", mpg123_plain_strerror(error));
-                }
-            }
-            else{
-                eraseCache = false;
-            }
-        }
-        else{
-            log("unsupported media type:%s\n", ext);
-        }
-        
-        if (eraseCache){
-            _audioCaches.erase(filePath);
         return AudioEngine::INVALID_AUDIO_ID;
     }
     
-        audioCache->_fileFullPath = FileUtils::getInstance()->fullPathForFilename(filePath);
-        _threadPool->addTask(std::bind(&AudioCache::readDataTask, audioCache));
-    }
-    else {
-        audioCache = &it->second;
-    }
-    
     auto player = &_audioPlayers[_currentAudioID];
     player->_alSource = alSource;
     player->_loop = loop;

cocos/audio/win32/AudioEngine-win32.h

@@ -61,6 +61,7 @@ public:
     
     void uncache(const std::string& filePath);
     void uncacheAll();
+    AudioCache* preload(const std::string& filePath);
     
     void update(float dt);
     

cocos/audio/winrt/AudioEngine-winrt.cpp

@@ -142,38 +142,34 @@ bool AudioEngineImpl::init()
     return ret;
 }
 
-int AudioEngineImpl::play2d(const std::string &filePath, bool loop, float volume)
+AudioCache* AudioEngineImpl::preload(const std::string& filePath)
 {
     AudioCache* audioCache = nullptr;
+    do 
+    {
         auto it = _audioCaches.find(filePath);
         if (it == _audioCaches.end()) {
-        audioCache = &_audioCaches[filePath];
+            FileFormat fileFormat = FileFormat::UNKNOWN;
 
             auto ext = filePath.substr(filePath.rfind('.'));
             transform(ext.begin(), ext.end(), ext.begin(), tolower);
 
-        bool eraseCache = true;
-
             if (ext.compare(".wav") == 0){
-            audioCache->_fileFormat = FileFormat::WAV;
+                fileFormat = FileFormat::WAV;
-            eraseCache = false;
             }
             else if (ext.compare(".ogg") == 0){
-            audioCache->_fileFormat = FileFormat::OGG;
+                fileFormat = FileFormat::OGG;
-            eraseCache = false;
             }
             else if (ext.compare(".mp3") == 0){
-            audioCache->_fileFormat = FileFormat::MP3;
+                fileFormat = FileFormat::MP3;
-            eraseCache = false;
             }
             else{
                 log("unsupported media type:%s\n", ext.c_str());
+                break;
             }
 
-        if (eraseCache){
+            audioCache = &_audioCaches[filePath];
-            _audioCaches.erase(filePath);
+            audioCache->_fileFormat = fileFormat;
-            return AudioEngine::INVALID_AUDIO_ID;
-        }
 
             std::string fullPath = FileUtils::getInstance()->fullPathForFilename(filePath);
             audioCache->_fileFullPath = fullPath;
@@ -182,6 +178,18 @@ int AudioEngineImpl::play2d(const std::string &filePath, bool loop, float volume
         else {
             audioCache = &it->second;
         }
+    } while (false);
+
+    return audioCache;
+}
+
+int AudioEngineImpl::play2d(const std::string &filePath, bool loop, float volume)
+{
+    auto audioCache = preload(filePath);
+    if (audioCache == nullptr)
+    {
+        return AudioEngine::INVALID_AUDIO_ID;
+    }
 
     auto player = &_audioPlayers[_currentAudioID];
     player->_loop = loop;

cocos/audio/winrt/AudioEngine-winrt.h

@@ -58,6 +58,7 @@ NS_CC_BEGIN
      void setFinishCallback(int audioID, const std::function<void(int, const std::string &)> &callback);
      void uncache(const std::string& filePath);
      void uncacheAll();
+     AudioCache* preload(const std::string& filePath);
      void update(float dt);
 
  private:

tests/cpp-tests/Classes/NewAudioEngineTest/NewAudioEngineTest.cpp

@@ -303,7 +303,7 @@ bool AudioControlTest::init()
         }
     });
     _playItem = playItem;
-    playItem->setPosition(layerSize.width * 0.3f,layerSize.height * 0.7f);
+    playItem->setPosition(layerSize.width * 0.3f,layerSize.height * 0.8f);
     addChild(playItem);
     
     auto stopItem = TextButton::create("stop", [&](TextButton* button){
@@ -314,7 +314,7 @@ bool AudioControlTest::init()
             ((TextButton*)_playItem)->setEnabled(true);
         }
     });
-    stopItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.7f);
+    stopItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.8f);
     addChild(stopItem);
     
     auto pauseItem = TextButton::create("pause", [&](TextButton* button){
@@ -322,7 +322,7 @@ bool AudioControlTest::init()
             AudioEngine::pause(_audioID);
         }
     });
-    pauseItem->setPosition(layerSize.width * 0.3f,layerSize.height * 0.6f);
+    pauseItem->setPosition(layerSize.width * 0.3f,layerSize.height * 0.7f);
     addChild(pauseItem);
     
     auto resumeItem = TextButton::create("resume", [&](TextButton* button){
@@ -330,7 +330,7 @@ bool AudioControlTest::init()
             AudioEngine::resume(_audioID);
         }
     });
-    resumeItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.6f);
+    resumeItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.7f);
     addChild(resumeItem);
     
     auto loopItem = TextButton::create("enable-loop", [&](TextButton* button){
@@ -346,16 +346,22 @@ bool AudioControlTest::init()
             button->setString("enable-loop");
         }
     });
-    loopItem->setPosition(layerSize.width * 0.3f,layerSize.height * 0.5f);
+    loopItem->setPosition(layerSize.width * 0.5f, layerSize.height * 0.5f);
     addChild(loopItem);
     
+    auto preloadItem = TextButton::create("preload", [&](TextButton* button){
+        AudioEngine::preload("background.mp3");
+    });
+    preloadItem->setPosition(layerSize.width * 0.3f, layerSize.height * 0.6f);
+    addChild(preloadItem);
+
     auto uncacheItem = TextButton::create("uncache", [&](TextButton* button){
         AudioEngine::uncache("background.mp3");
         
         _audioID = AudioEngine::INVALID_AUDIO_ID;
         ((TextButton*)_playItem)->setEnabled(true);
     });
-    uncacheItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.5f);
+    uncacheItem->setPosition(layerSize.width * 0.7f,layerSize.height * 0.6f);
     addChild(uncacheItem);
     
     auto volumeSlider = SliderEx::create();