Cocos2d-x中背景音乐和音效使用实例

//声音预先处理类的头文件#ifndef _AUDIO_PRETREAT_H#define _AUDIO_PRETREAT_H#include "cocos2d.h"//使用声音引擎必须包含SimpleAudioEngeim.h头文件#include "SimpleAudioEngine.h"using namespace cocos2d;//声音引擎的命名空间using namespace CocosDenshion;//类AudioPretrea采用单例设计模式//把用到的音乐做为枚举类型enum MUSIC_TYPE{	MUSIC_TYPE_BACKGROUND //背景音乐};//把用到的音乐做为枚举类型enum EFFECT_TYPE{	EFFECT_TYPE_EFFECT1};class AudioPretreat{private:	static AudioPretreat * m_audioPretreat;public:	//单例设计的时候需要用到的俩个函数	static AudioPretreat * sharedAudioPretreat();	static void freeAudioPretreat();	//可以根据不同的平台获取不同的声音文件	char * getMusic(MUSIC_TYPE type);	char * getEffect(EFFECT_TYPE type);	//在init中完成声音的预先加载	bool init();};#endif

//声音预先处理类的实现#include "AudioPretreat.h"//单例设计模式采用的惯用方式AudioPretreat * AudioPretreat::m_audioPretreat = NULL;AudioPretreat * AudioPretreat::sharedAudioPretreat(){	if(NULL == m_audioPretreat)	{		m_audioPretreat = new AudioPretreat();	}	return m_audioPretreat;}//在AppDelegate析构的时候调用这个函数void AudioPretreat::freeAudioPretreat(){	if(m_audioPretreat)	{		delete m_audioPretreat;		m_audioPretreat = NULL;	}}//根据不同的平台获得不同的声音文件char * AudioPretreat::getMusic(MUSIC_TYPE type){	switch(type)	{	case MUSIC_TYPE_BACKGROUND:		//WIN32,ANDROID,IOS都使用MP3格式的背景音乐#if(CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)	return "background-music.mp3";#else(CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)	return "background-music.mp3";#endif	break;	}	return NULL;}//根据不同的平台获得不同的音效文件char * AudioPretreat::getEffect(EFFECT_TYPE type){	switch(type)	{	case EFFECT_TYPE_EFFECT1:#if(CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)		return "pew-pew-lei.wav";#else(CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)		return "pew-pew-lei.ogg";#endif	}	return NULL;}//init函数中完成一些初始化的操作bool AudioPretreat::init(){	bool bRet = false;	do	{		//预先加载声音，参数是声音文件		SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(this->getMusic(MUSIC_TYPE_BACKGROUND));		//加载音效		SimpleAudioEngine::sharedEngine()->preloadEffect(this->getEffect(EFFECT_TYPE_EFFECT1));		//设置声音的大小0.0-1.0		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);		bRet = true;	}	while(0);	return bRet;}

// 下面就来看一下如何使用声音引擎bool HelloWorld::init(){  bool bRet = false;  do  {    CC_BREAK_IF(! CCLayer::init());		CCSize size = CCDirector::sharedDirector()->getVisibleSize();		AudioPretreat::sharedAudioPretreat()->init();		//以下是对背景音乐的一些操作		//设置字符串，并且转码		std::string str1 = "播放背景音乐";		std::string str2 = "停止背景音乐";		std::string str3 = "暂停背景音乐";		std::string str4 = "恢复背景音乐";		std::string str5 = "重头播放背景音乐";		std::string str6 = "背景音乐：加";		std::string str7 = "背景音乐：减";		GBKToUTF8(str1,"GB2312","UTF-8");		GBKToUTF8(str2,"GB2312","UTF-8");		GBKToUTF8(str3,"GB2312","UTF-8");		GBKToUTF8(str4,"GB2312","UTF-8");		GBKToUTF8(str5,"GB2312","UTF-8");		GBKToUTF8(str6,"GB2312","UTF-8");		GBKToUTF8(str7,"GB2312","UTF-8");		CCMenuItemFont::setFontSize(24);		CCMenuItemFont::setFontName("Arial");		CCMenuItemFont * menu1 = CCMenuItemFont::create(str1.c_str(),this,menu_selector(HelloWorld::menu));		menu1->setTag(1);		CCMenuItemFont * menu2 = CCMenuItemFont::create(str2.c_str(),this,menu_selector(HelloWorld::menu));		menu2->setTag(2);		CCMenuItemFont * menu3 = CCMenuItemFont::create(str3.c_str(),this,menu_selector(HelloWorld::menu));		menu3->setTag(3);		CCMenuItemFont * menu4 = CCMenuItemFont::create(str4.c_str(),this,menu_selector(HelloWorld::menu));		menu4->setTag(4);		CCMenuItemFont * menu5 = CCMenuItemFont::create(str5.c_str(),this,menu_selector(HelloWorld::menu));		menu5->setTag(5);		CCMenuItemFont * menu6 = CCMenuItemFont::create(str6.c_str(),this,menu_selector(HelloWorld::menu));		menu6->setTag(6);		CCMenuItemFont * menu7 = CCMenuItemFont::create(str7.c_str(),this,menu_selector(HelloWorld::menu));		menu7->setTag(7);		CCMenu * leftMenu = CCMenu::create(menu1,menu2,menu3,menu4,menu5,menu6,menu7,NULL);		leftMenu->alignItemsVerticallyWithPadding(5);		leftMenu->setPositionX(size.width/4);		this->addChild(leftMenu);		//以下是对音效的操作		std::string str11 = "播放音效";		std::string str12 = "停止音效";		std::string str13 = "暂停音效";		std::string str14 = "恢复音效";		std::string str15 = "从缓存中移除音效";		std::string str16 = "音效：加";		std::string str17 = "音效：减";		GBKToUTF8(str11,"GB2312","UTF-8");		GBKToUTF8(str12,"GB2312","UTF-8");		GBKToUTF8(str13,"GB2312","UTF-8");		GBKToUTF8(str14,"GB2312","UTF-8");		GBKToUTF8(str15,"GB2312","UTF-8");		GBKToUTF8(str16,"GB2312","UTF-8");		GBKToUTF8(str17,"GB2312","UTF-8");		CCMenuItemFont * menu11 = CCMenuItemFont::create(str11.c_str(),this,menu_selector(HelloWorld::menu));		menu11->setTag(11);		CCMenuItemFont * menu12 = CCMenuItemFont::create(str12.c_str(),this,menu_selector(HelloWorld::menu));		menu12->setTag(12);		CCMenuItemFont * menu13 = CCMenuItemFont::create(str13.c_str(),this,menu_selector(HelloWorld::menu));		menu13->setTag(13);		CCMenuItemFont * menu14 = CCMenuItemFont::create(str14.c_str(),this,menu_selector(HelloWorld::menu));		menu14->setTag(14);		CCMenuItemFont * menu15 = CCMenuItemFont::create(str15.c_str(),this,menu_selector(HelloWorld::menu));		menu15->setTag(15);		CCMenuItemFont * menu16 = CCMenuItemFont::create(str16.c_str(),this,menu_selector(HelloWorld::menu));		menu16->setTag(16);		CCMenuItemFont * menu17 = CCMenuItemFont::create(str17.c_str(),this,menu_selector(HelloWorld::menu));		menu17->setTag(17);		CCMenu * rightMenu = CCMenu::create(menu11,menu12,menu13,menu14,menu15,menu16,menu17,NULL);		rightMenu->alignItemsVerticallyWithPadding(5);		rightMenu->setPositionX(size.width*3/4);		this->addChild(rightMenu);    bRet = true;  } while (0);  return bRet;}void HelloWorld::menu(CCObject * sender){	CCNode * node = (CCNode *)sender;	int tag = node->getTag();	switch(tag)	{	case 1:		//播放声音，第二个参数代表是否循环播放		SimpleAudioEngine::sharedEngine()->playBackgroundMusic(			AudioPretreat::sharedAudioPretreat()->getMusic(MUSIC_TYPE_BACKGROUND),true);		break;	case 2:		SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();		break;	case 3:		//pause和resume成对使用		SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();		break;	case 4:		SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();		break;	case 5:		SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();		break;	case 6:		//这个函数在win32上没法改变声音的大小，大家用f12跟进函数的时候里边是空，但是在android平台上有实现		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(			SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume()+0.1f);		break;	case 7:		//这个函数在win32上没法改变声音的大小，大家用f12跟进函数的时候里边是空，但是在android平台上有实现		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(			SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume()-0.1f);		break;	case 11:		//第二个参数设为true的话则循环播放,soundID是在HelloWorld的头文件中定义的		//音效函数不同于背景音乐的是会返回一个ID		soundID = SimpleAudioEngine::sharedEngine()->playEffect(			AudioPretreat::sharedAudioPretreat()->getEffect(EFFECT_TYPE_EFFECT1),true);		break;	case 12:		//音效函数大多会传入一个ID，因为游戏中的音效不止一个		SimpleAudioEngine::sharedEngine()->stopEffect(soundID);		break;	case 13:		SimpleAudioEngine::sharedEngine()->pauseEffect(soundID);		break;	case 14:		SimpleAudioEngine::sharedEngine()->resumeEffect(soundID);	case 15:		//从缓存中移除音效，需要传入移除的音效的名字		SimpleAudioEngine::sharedEngine()->unloadEffect(			AudioPretreat::sharedAudioPretreat()->getEffect(EFFECT_TYPE_EFFECT1));	case 16:		SimpleAudioEngine::sharedEngine()->setEffectsVolume(			SimpleAudioEngine::sharedEngine()->getEffectsVolume()+0.1);		break;	case 17:		SimpleAudioEngine::sharedEngine()->setEffectsVolume(			SimpleAudioEngine::sharedEngine()->getEffectsVolume()-0.1);		break;	}}//编码格式转化函数int GBKToUTF8(std::string & gbkStr, const char* toCode, const char* fromCode){	iconv_t iconvH;	iconvH = iconv_open(fromCode, toCode);	if (iconvH == 0)	{		return -1;	}	const char* strChar = gbkStr.c_str();	const char** pin = &strChar;	size_t strLength = gbkStr.length();	char* outbuf = (char*) malloc(strLength*4);	char* pBuff = outbuf;	memset( outbuf, 0, strLength*4);	size_t outLength = strLength*4;	if (-1 == iconv(iconvH, pin, &strLength, &outbuf, &outLength))	{		iconv_close(iconvH);		return -1;	}	gbkStr = pBuff;	iconv_close(iconvH);	return 0;}