Cocos2d-x_播放音乐和音效

//
// 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"
#endif

string 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,i);
    }
    this->addChild(pMenu,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;
    }
}

（编辑：李大同）

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