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房卡麻将分析系列之"千里传音"
在房卡棋牌游戏中，因为要频繁的看牌，出牌。为了实时沟通打字聊天往往比较麻烦，通过语音交流，催牌可以很好的帮助玩家及时的表达情绪，增强游戏的气氛。
那么这是怎么做到的呢？
首先这个过程分为三步：
一。录制声音并压缩成数据包：这个过程一般是当玩家点击按钮，开始录音，松开按钮，停止录音并生成WAV文件，之后通过编码转换压缩为
在这里要根据安卓和苹果两个平台来做区分。
void startSoundRecord()
{
std::string kFileName = utility::toString(time(NULL),".wav");
s_kRecordFileName = cocos2d::FileUtils::getInstance()->getWritablePath()+kFileName;
#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
JniMethodInfo minfo;
bool isHave = JniHelper::getStaticMethodInfo(minfo,JAVA_CLASSNAME, "startSoundRecord", "(Ljava/lang/String;)V");
if (isHave)
{
jstring jurl = minfo.env->NewStringUTF(kFileName.c_str());
minfo.env->CallStaticVoidMethod(minfo.classID, minfo.methodID,jurl);
cocos2d::log("JniFun call startSoundRecord over!");
minfo.env->DeleteLocalRef(minfo.classID);
}
else
{
cocos2d::log("JniFun call startSoundRecord error!");
}
#endif
#if CC_TARGET_PLATFORM == CC_PLATFORM_IOS
IosHelper::beginRecord(s_kRecordFileName.c_str());
#endif
}
const char* stopSoundRecord()
{
#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
std::string str;
JniMethodInfo minfo;
bool isHave = JniHelper::getStaticMethodInfo(minfo,JAVA_CLASSNAME, "stopSoundRecord", "()Ljava/lang/String;");
if (isHave)
{
jstring jFileName = (jstring)minfo.env->CallStaticObjectMethod(minfo.classID, minfo.methodID);
const char *newStr = minfo.env->GetStringUTFChars(jFileName, 0);
str = newStr;
cocos2d::log("JniFun call stopSoundRecord over :");
cocos2d::log("%s",str.c_str());
minfo.env->ReleaseStringUTFChars(jFileName, newStr);
minfo.env->DeleteLocalRef(minfo.classID);
}
else
{
cocos2d::log("JniFun call stopSoundRecord error!");
}
return str.c_str();
#endif
#if CC_TARGET_PLATFORM == CC_PLATFORM_IOS
IosHelper::endRecord();
return s_kRecordFileName.c_str();
#endif
return "";
}在Native.java中实现录音和结束：
//开始录音
public static void startSoundRecord( String SoundFileName)
{
String SoundFilePath= Environment.getExternalStorageDirectory().getAbsolutePath();
if (filePath != null)
{
File file = new File(filePath);
if (file!= null && file.exists())
{
file.delete();
}
}
filePath = SoundFilePath+"/"+SoundFileName;
recorder = new MediaRecorder();
//从麦克风中录音
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//设置编码格式为AMR
recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(SoundFilePath+"/"+SoundFileName);
try {
recorder.prepare();//
recorder.start();//
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//结束录音
public static String stopSoundRecord()
{
recorder.stop();//
recorder.release(); //
recorder = null;
return filePath;
}另外，要在AndroidMainfest.xml中注意开启录音权限：
<uses-permission android:name="android.permission.RECORD_AUDIO" /> IOS版本处理：需要在mm文件中完成相应函数
AVAudioRecorder *recorder = NULL;
void IosHelper::beginRecord(const char *_fileName)
{
if (recorder == nil)
{
//设置文件名和录音路径
NSString *recordFilePath = [NSString stringWithCString:_fileName encoding:NSUTF8StringEncoding];
NSDictionary *recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithFloat: 8000.0],AVSampleRateKey, //采样率
[NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey,
[NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,//采样位数 默认 16
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,//通道的数目
nil];
//初始化录音
NSError *error = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:recordFilePath] settings:recordSetting error:&error];
}
recorder.meteringEnabled = YES;
[recorder prepareToRecord];
//开始录音
UInt32 sessionCategory = kAudioSessionCategory_PlayAndRecord;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
// 扬声器播放
UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
[recorder record];
}
const char * IosHelper::endRecord()
{
if (recorder == nil)
return "";
if (recorder.isRecording)
[recorder stop];
return "";
}
二。发送声音数据到服务器：在结束录制声音并生成文件后，将文件发送出去。
std::string kFileName = JniFun::stopSoundRecord();
sendTalkFile(m_pLocal->GetChairID(),kFileName);这里就是将文件以数据包形式发送出去，不做详细表述。
三。接收数据并解压，播放： 在接收到消息后，将数据写入文件并播放即可。
bool GameBase::RevTalk_File(CMD_GR_C_TableTalk* pNetInfo)
{
if (pNetInfo->strTalkSize == 0)
{
return true;
}
static int iIdex = 0;
iIdex ++;
std::string kFile = utility::toString(cocos2d::CCFileUtils::sharedFileUtils()->getWritablePath(),"TableTalk",iIdex,".arm");
FILE *fp = fopen(kFile.c_str(), "wb");
fseek(fp,0,SEEK_END);
fseek(fp,0,SEEK_SET);
fwrite(&pNetInfo->strTalkData,sizeof(unsigned char), pNetInfo->strTalkSize,fp);
fclose(fp);
int iAddTime = pNetInfo->strTalkSize/1200+2.0f;
if (iAddTime > 10)
{
iAddTime = 10;
}
std::string kDestFile = kFile;
utility::StringReplace(kDestFile,"arm","wav");
//这里需要做一个解压转换，将ARM转换成WAV
ArmFun::ArmToWav(kFile.c_str(),kDestFile.c_str());
//为了防止游戏音乐干扰，先静音游戏音乐
SoundFun::Instance().PaseBackMusic();
SoundFun::Instance().ResumeBackMusic(iAddTime);
SoundFun::Instance().PaseEffectMusic();
SoundFun::Instance().ResumeEffectMusic(iAddTime);
//播放接收到的声音文件
SoundFun::Instance().playEffectDirect(kDestFile);
//指定玩家显示播放语音的动画图标
GamePlayer* pPlayer = getBasePlayerByChairID(pNetInfo->cbChairID);
if (pPlayer)
{
pPlayer->showTalkState(pNetInfo);
}
return true;
}
最终，房卡棋牌中的语音聊天就完整的实现出来了，当然，这种方式并不完美，如果能开启P2P的实时语音对话就更好了。另外，这套代码中会不断的产生声音文件，这是个问题，小伙伴们可以在发送完声音和播放完声音后删除生成的声音文件，以免造成空间增长的BUG~
”房卡“麻将研发技巧，尽在”红孩儿的游戏开发之路“，欢迎关注公众号！
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