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];