游戏中录音功能的实现

正好这次游戏更新版本，有时间来把录音功能做一下，计划把之前游戏的录音功能移过来。

转自http://www.liveslives.com http://blog.csdn.net/huutu

Unity是自带录音功能的，介绍Unity录音功能的文章：

http://blog.csdn.net/huutu/article/details/20216613

但是这种录音的方式，文件太大，不适合在移动平台使用。所以像微信 QQ 等 一般都是用AMR格式来作为录音传输。

AMR 音频

转自http://www.liveslives.com http://blog.csdn.net/huutu

AMR是安卓平台录音的文件格式，IOS已经不支持这种格式了，不过好在安卓是开源系统，所以在IOS上可以自己编译lib 来编码 和 解析 AMR。

Android端

开始录音

mRecorder = new MediaRecorder();	
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); // 设置音频来源（MIC表示麦克风）	
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR); // 设置音频输出格式

mRecorder.setOutputFile(mRecorderFilePath);//设置输出文件	
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // 设置音频编码为AMR

mRecorder.setMaxDuration(20300);//设置录音时长

mRecorder.setAudioEncodingBitRate(4000);

mRecorder.setAudioSamplingRate(8000);//采样率

try {
	mRecorder.prepare();

	mRecorder.start();
	
} catch (IllegalStateException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
} catch (IOException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
}

结束录音

mRecorder.stop();

mRecorder.release();

转自http://www.liveslives.com http://blog.csdn.net/huutu

播放录音

MediaPlayer mPlayer = new MediaPlayer();

mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() 
{//播放完毕回调监听

	@Override

	public void onCompletion(MediaPlayer arg0) 
	{
		Toast.makeText(MainActivity.this, "Play End", Toast.LENGTH_LONG).show();
	}

	});

try {
	
	Log.i("yhxy", "Play mRecorderFilePath:"+mRecorderFilePath);
	File f= new File(mRecorderFilePath);  
	if (f.exists() && f.isFile())
	{  
		Toast.makeText(getApplicationContext(), "filesize:"+f.length(), Toast.LENGTH_LONG).show();
		
	}else{  
		Toast.makeText(getApplicationContext(), "file not exist", Toast.LENGTH_LONG).show();
	}  
	
	
	mPlayer.setDataSource(mRecorderFilePath);

	mPlayer.prepare();

	//开始播放
	mPlayer.start();
	
} catch (IllegalArgumentException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
} catch (SecurityException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
} catch (IllegalStateException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
} catch (IOException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
}

Android 录音 主要注意 权限 配置以及 OS 版本。

Manifest 配置

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


<uses-sdk android:minSdkVersion="10" android:targetSdkVersion="21" />

转自http://www.liveslives.com http://blog.csdn.net/huutu

IOS端

IOS没有对AMR支持，我们需要下载opencore-amr 源代码自行编译成 lib 。

编译opencore-amr

从SourceForge上下载：

https://sourceforge.net/projects/opencore-amr/

然后创建脚本build.sh

#!/bin/sh
set -xe
VERSION="0.1.5" #opencore-amr version
SDKVERSION="10.3" #xcode Deployment Target
LIBSRCNAME="opencore-amr"
CURRENTPATH=`pwd`
mkdir -p "${CURRENTPATH}/src"
tar zxvf ${LIBSRCNAME}-${VERSION}.tar.gz -C "${CURRENTPATH}/src"
cd "${CURRENTPATH}/src/${LIBSRCNAME}-${VERSION}"
DEVELOPER=`xcode-select -print-path`
DEST="${CURRENTPATH}/lib-ios"
mkdir -p "${DEST}"
ARCHS="armv7 armv7s arm64 i386 x86_64"
# ARCHS="armv7"
LIBS="libopencore-amrnb.a libopencore-amrwb.a"
DEVELOPER=`xcode-select -print-path`
for arch in $ARCHS; do
case $arch in
arm*)
IOSV="-miphoneos-version-min=7.0"
if [ $arch == "arm64" ]
then
IOSV="-miphoneos-version-min=7.0"
fi
echo "Building for iOS $arch ****************"
SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"
CC="$(xcrun --sdk iphoneos -f clang)"
CXX="$(xcrun --sdk iphoneos -f clang++)"
CPP="$(xcrun -sdk iphonesimulator -f clang++)"
CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"
CXXFLAGS=$CFLAGS
CPPFLAGS=$CFLAGS
export CC CXX CFLAGS CXXFLAGS CPPFLAGS
./configure \
--host=arm-apple-darwin \
--prefix=$DEST \
--disable-shared --enable-static
;;
*)
IOSV="-mios-simulator-version-min=7.0"
echo "Building for iOS $arch*****************"
SDKROOT=`xcodebuild -version -sdk iphonesimulator Path`
CC="$(xcrun -sdk iphoneos -f clang)"
CXX="$(xcrun -sdk iphonesimulator -f clang++)"
CPP="$(xcrun -sdk iphonesimulator -f clang++)"
CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"
CXXFLAGS=$CFLAGS
CPPFLAGS=$CFLAGS
export CC CXX CFLAGS CXXFLAGS CPPFLAGS
./configure \
--prefix=$DEST \
--disable-shared
;;
esac
make > /dev/null
make install
make clean
for i in $LIBS; do
mv $DEST/lib/$i $DEST/lib/$i.$arch
done
done
for i in $LIBS; do
input=""
for arch in $ARCHS; do
input="$input $DEST/lib/$i.$arch"
done
lipo -create -output $DEST/lib/$i $input
done

将build.sh 和 下载的 opencore 压缩包 放置同一个目录，然后在终端中执行脚本。

转自http://www.liveslives.com http://blog.csdn.net/huutu

执行完毕之后，在 lib-ios 目录中可以看到编译好的lib。

配置Libraries

将上面编译好的lib 拖至Xcode中引用，然后添加 CoreAudio AVFoundation 。

开始录音

-(void)StartRecord:(NSString*)fileName;
{
    
    NSLog(@"StartRecord %@",fileName);
    
    self.amrfilename=fileName;
    
    //录音前先删除amr文件
    NSFileManager *pfilemanager=[NSFileManager defaultManager];
    
    NSArray* tmpPaths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* tmpDocumentDir=[tmpPaths objectAtIndex:0];
    
    NSString *ptmpAmrfilepath = [tmpDocumentDir stringByAppendingPathComponent:amrfilename];
    NSLog(@"amr filepath:%@",ptmpAmrfilepath);
    
    BOOL bRet=[pfilemanager fileExistsAtPath:ptmpAmrfilepath];
    if(bRet)
    {
        NSLog(@"remove arm file:%@",ptmpAmrfilepath);
        [pfilemanager removeItemAtPath:ptmpAmrfilepath error:nil];
    }
    
    NSString* ptmprecordfilename=@"tempRecordVoice.tmp";
    NSString *ptmprecordfilepath = [tmpDocumentDir stringByAppendingPathComponent:ptmprecordfilename];
    bRet=[pfilemanager fileExistsAtPath:ptmprecordfilepath];
    if(bRet)
    {
        [pfilemanager removeItemAtPath:ptmprecordfilepath error:nil];
    }
    

    
    
    

    //录音设置
    NSDictionary *recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
                                   [NSNumber numberWithInt:kAudioFormatLinearPCM],AVFormatIDKey,
                                   [NSNumber numberWithInt:8000],AVSampleRateKey,
                                   [NSNumber numberWithInt:1],AVNumberOfChannelsKey,
                                   [NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,
                                   nil];
    //实例化AVAudioRecorder
    audioRecorder = [[AVAudioRecorder alloc] initWithURL:
                     [NSURL fileURLWithPath:ptmprecordfilepath]
                                                settings:recordSetting
                                                   error:nil];
    [audioRecorder setDelegate:self];

    audioRecorder.meteringEnabled = YES;

    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];

    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    NSLog(@"startrecord 1");
    if ([audioRecorder prepareToRecord])
    {
        NSLog(@"startrecord 2");
        [audioRecorder record];
    }
    NSLog(@"startrecord 3");
    
}

停止录音

-(void)endRecord
{
    NSLog(@"endRecord");
    
    
    
    if(audioRecorder==nil)
    {
        return;
    }
    if ([audioRecorder isRecording]) {
        [audioRecorder stop];
    }
    [[AVAudioSession sharedInstance] setActive:NO error:nil];
    [audioRecorder release];
    audioRecorder=nil;
    //[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];
}

播放录音

- (void)playWithData:(NSData*)data{
    [self stopPlayQueue];
    [self setAVAudioSession];
    
    NSError *error = nil;
    audioPlayer = [[AVAudioPlayer alloc] initWithData:data error:&error];
    if (error) {
        NSLog(@"Error: %@", [error localizedDescription]);
    }
    audioPlayer.delegate = self; // 设置代理
    [audioPlayer prepareToPlay];// 准备播放
    [audioPlayer play];// 开始播放
}