iOS 使用EZAudio库生成wav出错的情况

使用EZAudio库

录M4A格式可以参考该库例子中的代码.

录wav格式得改下源码.看下面的代码

  AVAudioSession *session = [AVAudioSession sharedInstance];

     NSError *error = nil;

     [session setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];

     if (error) NSLog(@"audio session category error: %@", error);

     [session setActive:YES error:&error];

     if (error) NSLog(@"audio session active error: %@", error);

     self.microphone = [EZMicrophone microphoneWithDelegate:self];

     self.recorder = [EZRecorder recorderWithURL:[NSURL fileURLWithPath:RECORD_PATH]

                                    clientFormat:[self.microphone audioStreamBasicDescription]

                                        fileType:EZRecorderFileTypeWAV // 指定为WAV格式

                                        delegate:self];

     [self.microphone startFetchingAudio];

     self.recording = YES;

     self.audioTimer = [NSTimer scheduledTimerWithTimeInterval:1.0f

                                                        target:self

                                                      selector:@selector(audioTimer:)

                                                      userInfo:nil repeats:YES];

 // 定时器计算录音时间

 - (void)audioTimer:(NSTimer *)timer

 {

     self.audioV.audioTime = (int)self.recorder.currentTime;

 }

 // 这是个代理函数 可以用来计算音量

 - (void)microphone:(EZMicrophone *)microphone

   hasAudioReceived:(float **)buffer

     withBufferSize:(UInt32)bufferSize

 withNumberOfChannels:(UInt32)numberOfChannels

 {

     dispatch_async(dispatch_get_main_queue(), ^{

         if (self.isRecording) {

             CGFloat vol = [EZAudioUtilities RMS:buffer[] length:bufferSize];

             //vol就是音量 *150是因为放大后控制控件宽度

             self.audioV.vol = (int)(vol * );

         }

     });

 }

以上这种写法会闪退.原因是这个库录wav格式配置不对.

修改库中EZAudioUtilities.m文件第287行函数为

 + (AudioStreamBasicDescription)stereoFloatInterleavedFormatWithSampleRate:(float)sampleRate

 {

 #if 0 // 这个库本身的代码 录wav格式直接出错 闪退

     AudioStreamBasicDescription asbd;

     UInt32 floatByteSize   = sizeof(float);

     asbd.mChannelsPerFrame = ;

     asbd.mBitsPerChannel   =  * floatByteSize;

     asbd.mBytesPerFrame    = asbd.mChannelsPerFrame * floatByteSize;

     asbd.mFramesPerPacket  = ;

     asbd.mBytesPerPacket   = asbd.mFramesPerPacket * asbd.mBytesPerFrame;

     asbd.mFormatFlags      = kAudioFormatFlagIsFloat;

     asbd.mFormatID         = kAudioFormatLinearPCM;

     asbd.mSampleRate       = sampleRate;

     asbd.mReserved         = ;

     return asbd;

 #endif

     // 改用这种配置录出来就是wav格式

     AudioStreamBasicDescription asbd;

     memset(&asbd, , sizeof(asbd));

     asbd.mSampleRate = ;            //采样率

     asbd.mFormatID = kAudioFormatLinearPCM;

     asbd.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;

     asbd.mChannelsPerFrame = ;         //单声道

     asbd.mFramesPerPacket = ;          //每一个packet一侦数据

     asbd.mBitsPerChannel = ;          //每个采样点16bit量化

     asbd.mBytesPerFrame = (asbd.mBitsPerChannel / ) * asbd.mChannelsPerFrame;

     asbd.mBytesPerPacket = asbd.mBytesPerFrame ;

     return asbd;

 }

使用EncodeAudio库转为amr格式

提取密码: prdq

//转成amr格式后发送 NSData * data = [[NSData alloc] initWithContentsOfFile:RECORD_PATH]; data = [EncodeAudio convertWavToAmrFile:data];