Cocos2d-x_播放音乐和音效

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//// HelloWorldScene.h//#ifndef __HELLOWORLD_SCENE_H__#define __HELLOWORLD_SCENE_H__#include "cocos2d.h"#include "cocos-ext.h"USING_NS_CC;USING_NS_CC_EXT;class HelloWorld : public cocos2d::CCLayer{public:    virtual bool init();    static cocos2d::CCScene* scene();    CREATE_FUNC(HelloWorld);    void menuCallBack(CCObject *pSender);};#endif

//// HelloWorldScene.cpp//#include "HelloWorldScene.h"#include "SimpleAudioEngine.h"USING_NS_CC;using namespace std;using namespace CocosDenshion;// 根据不同平台使用预编译索引不同的音频文件#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)#define EFFECT_FILE "effect2.ogg"#elif (CC_TARGET_PLATFORM == CC_PLATFORM_MARMALADE)#define EFFECT_FILE "effect1.raw"#else#define EFFECT_FILE "effect1.wav"#endif#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)#define MUSIC_FILE "music.mid"#elif (CC_TARGET_PLATFORM == CC_PLATFORM_BLACKBERRY)#define MUSIC_FILE "background.ogg"#else#define MUSIC_FILE "background.mp3"#endifstring items[] = {"播放背景音乐", "停止背景音乐", "暂停背景音乐", "继续播放背景音乐", "后退背景音乐", "背景音乐是否在播放", "播放音效", "重复播放音效", "停止播放音效", "释放音效", "增加背景音乐音量", "减少背景音乐音量", "增加音效音量", "减少音效音量", "暂停音效", "继续播放音效", "暂停所有音效", "继续所有音效", "停止所有音效"};int effectID = -1;CCScene* HelloWorld::scene(){    CCScene *scene = CCScene::create();    HelloWorld *layer = HelloWorld::create();    scene->addChild(layer);        return scene;}// 图层bool HelloWorld::init(){    if ( !CCLayer::init() )    {        return false;    }        CCSize winSize = CCDirector::sharedDirector()->getWinSize();    CCMenu *pMenu = CCMenu::create();    int itemsCount = sizeof(items) / sizeof(items[0]);    for (int i = 0; i < itemsCount; i ++)    {        CCLabelTTF *plabTTF = CCLabelTTF::create(items[i].c_str(), "Arial", 15);        CCMenuItemLabel *pmenuLab = CCMenuItemLabel::create(plabTTF, this, menu_selector(HelloWorld::menuCallBack));        pmenuLab->setPosition(ccp(0, (winSize.height*0.5-20-(i+1)*15)));        pMenu->addChild(pmenuLab, 0, i);    }    this->addChild(pMenu,0,100);        // 预加载音乐和音效    SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(MUSIC_FILE);    SimpleAudioEngine::sharedEngine()->preloadEffect(EFFECT_FILE);    SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.5);    SimpleAudioEngine::sharedEngine()->setEffectsVolume(0.5);        return true;}void HelloWorld::menuCallBack(cocos2d::CCObject *pSender){    CCLOG("HelloWorld::menuCallBack");        CCMenuItem *pItem = (CCMenuItem *)pSender;    int nIdx = pItem->getTag();        switch (nIdx)    {        case 0:            SimpleAudioEngine::sharedEngine()->playBackgroundMusic(MUSIC_FILE, true);            break;        case 1:            SimpleAudioEngine::sharedEngine()->stopBackgroundMusic(true);            break;        case 2:            SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();            break;        case 3:            SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();            break;        case 4:            SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();            break;        case 5:            if (SimpleAudioEngine::sharedEngine()->isBackgroundMusicPlaying())            {                CCLOG("背景音乐正在播放!");            }            else            {                CCLOG("背景音乐没在播放!");            }            break;        case 6:            effectID = SimpleAudioEngine::sharedEngine()->playEffect(EFFECT_FILE);            break;        case 7:            effectID = SimpleAudioEngine::sharedEngine()->playEffect(EFFECT_FILE, true);            break;        case 8:            SimpleAudioEngine::sharedEngine()->stopEffect(effectID);            break;        case 9:            SimpleAudioEngine::sharedEngine()->unloadEffect(EFFECT_FILE);            break;        case 10:            SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume() + 0.1f);            break;        case 11:            SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume() - 0.1f);            break;        case 12:            SimpleAudioEngine::sharedEngine()->setEffectsVolume(SimpleAudioEngine::sharedEngine()->getEffectsVolume() + 0.1f);            break;        case 13:            SimpleAudioEngine::sharedEngine()->setEffectsVolume(SimpleAudioEngine::sharedEngine()->getEffectsVolume() - 0.1f);            break;        case 14:            SimpleAudioEngine::sharedEngine()->pauseEffect(effectID);            break;        case 15:            SimpleAudioEngine::sharedEngine()->resumeEffect(effectID);            break;        case 16:            SimpleAudioEngine::sharedEngine()->pauseAllEffects();            break;        case 17:            SimpleAudioEngine::sharedEngine()->resumeAllEffects();            break;        case 18:            SimpleAudioEngine::sharedEngine()->stopAllEffects();            break;        default:            break;    }}

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