Cocos2d-x中背景音樂和音效使用實例

2020-01-26 15:19:31

字體：大中小

來源：轉載

供稿：網友

游戲中的音樂和音效是必不可少的，好的音樂可以給我們留下很深的印象也決定了這個游戲的品質。今天我們來學習一下cocos2d-x中如何使用音樂和音效。這些用到的函數都比較簡單，現在直接上代碼。

//聲音預先處理類的頭文件#ifndef _AUDIO_PRETREAT_H#define _AUDIO_PRETREAT_H#include "cocos2d.h"//使用聲音引擎必須包含SimpleAudioEngeim.h頭文件#include "SimpleAudioEngine.h"using namespace cocos2d;//聲音引擎的命名空間using namespace CocosDenshion;//類AudioPretrea采用單例設計模式//把用到的音樂做為枚舉類型enum MUSIC_TYPE{	MUSIC_TYPE_BACKGROUND //背景音樂};//把用到的音樂做為枚舉類型enum EFFECT_TYPE{	EFFECT_TYPE_EFFECT1};class AudioPretreat{private:	static AudioPretreat * m_audioPretreat;public:	//單例設計的時候需要用到的倆個函數	static AudioPretreat * sharedAudioPretreat();	static void freeAudioPretreat();	//可以根據不同的平臺獲取不同的聲音文件	char * getMusic(MUSIC_TYPE type);	char * getEffect(EFFECT_TYPE type);	//在init中完成聲音的預先加載	bool init();};#endif

//聲音預先處理類的實現#include "AudioPretreat.h"http://單例設計模式采用的慣用方式AudioPretreat * AudioPretreat::m_audioPretreat = NULL;AudioPretreat * AudioPretreat::sharedAudioPretreat(){	if(NULL == m_audioPretreat)	{		m_audioPretreat = new AudioPretreat();	}	return m_audioPretreat;}//在AppDelegate析構的時候調用這個函數void AudioPretreat::freeAudioPretreat(){	if(m_audioPretreat)	{		delete m_audioPretreat;		m_audioPretreat = NULL;	}}//根據不同的平臺獲得不同的聲音文件char * AudioPretreat::getMusic(MUSIC_TYPE type){	switch(type)	{	case MUSIC_TYPE_BACKGROUND:		//WIN32,ANDROID,IOS都使用MP3格式的背景音樂#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;}//根據不同的平臺獲得不同的音效文件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函數中完成一些初始化的操作bool AudioPretreat::init(){	bool bRet = false;	do	{		//預先加載聲音，參數是聲音文件		SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(this->getMusic(MUSIC_TYPE_BACKGROUND));		//加載音效		SimpleAudioEngine::sharedEngine()->preloadEffect(this->getEffect(EFFECT_TYPE_EFFECT1));		//設置聲音的大小0.0-1.0		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.1f);		bRet = true;	}	while(0);	return bRet;}

// 下面就來看一下如何使用聲音引擎bool HelloWorld::init(){  bool bRet = false;  do  {    CC_BREAK_IF(! CCLayer::init());		CCSize size = CCDirector::sharedDirector()->getVisibleSize();		AudioPretreat::sharedAudioPretreat()->init();		//以下是對背景音樂的一些操作		//設置字符串，并且轉碼		std::string str1 = "播放背景音樂";		std::string str2 = "停止背景音樂";		std::string str3 = "暫停背景音樂";		std::string str4 = "恢復背景音樂";		std::string str5 = "重頭播放背景音樂";		std::string str6 = "背景音樂：加";		std::string str7 = "背景音樂：減";		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);		//以下是對音效的操作		std::string str11 = "播放音效";		std::string str12 = "停止音效";		std::string str13 = "暫停音效";		std::string str14 = "恢復音效";		std::string str15 = "從緩存中移除音效";		std::string str16 = "音效：加";		std::string str17 = "音效：減";		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:		//播放聲音，第二個參數代表是否循環播放		SimpleAudioEngine::sharedEngine()->playBackgroundMusic(			AudioPretreat::sharedAudioPretreat()->getMusic(MUSIC_TYPE_BACKGROUND),true);		break;	case 2:		SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();		break;	case 3:		//pause和resume成對使用		SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();		break;	case 4:		SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();		break;	case 5:		SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();		break;	case 6:		//這個函數在win32上沒法改變聲音的大小，大家用f12跟進函數的時候里邊是空，但是在android平臺上有實現		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(			SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume()+0.1f);		break;	case 7:		//這個函數在win32上沒法改變聲音的大小，大家用f12跟進函數的時候里邊是空，但是在android平臺上有實現		SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(			SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume()-0.1f);		break;	case 11:		//第二個參數設為true的話則循環播放,soundID是在HelloWorld的頭文件中定義的		//音效函數不同于背景音樂的是會返回一個ID		soundID = SimpleAudioEngine::sharedEngine()->playEffect(			AudioPretreat::sharedAudioPretreat()->getEffect(EFFECT_TYPE_EFFECT1),true);		break;	case 12:		//音效函數大多會傳入一個ID，因為游戲中的音效不止一個		SimpleAudioEngine::sharedEngine()->stopEffect(soundID);		break;	case 13:		SimpleAudioEngine::sharedEngine()->pauseEffect(soundID);		break;	case 14:		SimpleAudioEngine::sharedEngine()->resumeEffect(soundID);	case 15:		//從緩存中移除音效，需要傳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;	}}//編碼格式轉化函數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;}