cocos2dx 音乐与音效

include "HelloWorldScene.h"  
#include "SimpleAudioEngine.h"  
  
using namespace cocos2d;  
using namespace CocosDenshion;  
  
//根据不同平台使用预编译索引不同音频文件  
#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  
  
std::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" ,"背景音乐是否正在播放", "播放音效", "重复播放音效"  
    ,"停止音效播放", "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"};  
  
CCScene* HelloWorld::scene()  
{  
    CCScene *scene = CCScene::create();  
    HelloWorld *layer = HelloWorld::create();  
    scene->addChild(layer);  
    return scene;  
}  
  
bool HelloWorld::init()  
{  
    if ( !CCLayer::init() )  
    {  
        return false;  
    }  
  
    CCMenu* m_pItmeMenu = CCMenu::create();  
      
    CCSize s = CCDirector::sharedDirector()->getWinSize();  
      
    int m_nTestCount = sizeof(items)/sizeof(items[0]);  
      
    for(int i = 0; i < m_nTestCount; i++)  
    {  
        CCLabelTTF* label = CCLabelTTF::create(items[i].c_str(), "Arial", 15);  
          
        CCMenuItemLabel* pMenuItem = CCMenuItemLabel::create(label, this, menu_selector(HelloWorld::menuBack));  
          
        pMenuItem->setPosition(CCPointMake(s.width*0.5, s.height - 20 - (i+1)*15));  
          
        m_pItmeMenu->addChild(pMenuItem, i);  
          
    }  
    m_pItmeMenu->setPosition(CCPointZero);  
      
    addChild(m_pItmeMenu, 0 , 100);  
      
    //预加载音乐和音效  
    SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(MUSIC_FILE));  
    SimpleAudioEngine::sharedEngine()->preloadEffect(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(EFFECT_FILE));  
    //设置默认音量  
    SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.5);  
    SimpleAudioEngine::sharedEngine()->setEffectsVolume(0.5);  
      
      
      
    return true;  
}  
  
//回调函数  
void HelloWorld::menuBack(cocos2d::CCObject *pSender)  
{  
    CCMenuItem* pMenuItem = (CCMenuItem*) pSender;  
      
    int nIdx = pMenuItem->getZOrder(); //得到z轴坐标  
      
    switch (nIdx) {  
        case 0:  
            //播放背景音乐  
            SimpleAudioEngine::sharedEngine()->playBackgroundMusic(std::string(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(MUSIC_FILE)).c_str(), true);  
            break;  
        case 1:  
            //停止背景音乐  
            SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();  
            break;  
        case 2:  
            //暂停背景音乐  
            SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();  
            break;  
        case 3:  
            //继续播放背景音乐  
            SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();  
            break;  
        case 4:  
            //后退背景音乐  
            SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();  
            break;  
        case 5:  
            //背景音乐是否正在播放  
            if(SimpleAudioEngine::sharedEngine()->isBackgroundMusicPlaying())  
            {  
                CCLOG("背景音乐正在播放");  
            }else{  
                CCLOG("背景音乐没有在播放");  
            }  
            break;  
        case 6:  
            //播放音效，并且得到此音效的ID  
            effectID = SimpleAudioEngine::sharedEngine()->playEffect(std::string(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(EFFECT_FILE)).c_str());  
            CCLOG("音效ID是%d",effectID);  
            break;  
        case 7:  
            //重复播放音效，并且得到此音效的ID  
            effectID = SimpleAudioEngine::sharedEngine()->playEffect(std::string(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(EFFECT_FILE)).c_str(),true );  
            CCLOG("音效ID是%d", effectID);  
            break;  
        case 8:  
            //停止播放音效  
            SimpleAudioEngine::sharedEngine()->stopEffect(effectID);  
            break;  
        case 9:  
            //释放音效  
            SimpleAudioEngine::sharedEngine()->unloadEffect(std::string(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(EFFECT_FILE)).c_str());  
            break;  
        case 10:  
            //增加背景音乐音量  
            SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume() + 0.1f);  
            break;  
        case 11:  
            //减少背景音乐音量  
            SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume() - 0.1f);  
            break;  
        case 12:  
            //增加音效音量  
            SimpleAudioEngine::sharedEngine()->setEffectsVolume(SimpleAudioEngine::sharedEngine()->getEffectsVolume() + 0.1f);  
            break;  
        case 13:  
            //减少音效音量  
            SimpleAudioEngine::sharedEngine()->setEffectsVolume(SimpleAudioEngine::sharedEngine()->getEffectsVolume() - 0.1f);  
            break;  
        case 14:  
            //暂停音效  
            SimpleAudioEngine::sharedEngine()->pauseEffect(effectID);  
            break;  
        case 15:  
            //继续播放音效  
            SimpleAudioEngine::sharedEngine()->resumeEffect(effectID);  
            break;  
        case 16:  
            //暂停所有音效  
            SimpleAudioEngine::sharedEngine()->pauseAllEffects();  
            break;  
        case 17:  
            //继续所有音效  
            SimpleAudioEngine::sharedEngine()->resumeAllEffects();  
            break;  
        case 18:  
            //停止所有音效  
            SimpleAudioEngine::sharedEngine()->stopAllEffects();  
            break;  
    }  
}