How to use the AEAudioFileWriter?

JYLegend

I have an audio and I added filter,I want save this new audio， I found this class 'AEAudioFileWriter' from The Amazing Audio Engine,but I do not konw how to use it.
I hope someone can help me
Thank you in advance

JYLegend

I use this code ,but not work!!
NSArray documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [documentsFolders[0] stringByAppendingPathComponent:@Recording.m4a];
NSError error = nil;

const int kBufferLength = 4096;
NSTimeInterval renderDuration = self.audioPlayer.duration;
Float64 sampleRate = self.audioControler.audioDescription.mSampleRate;
UInt32 lengthInFrames = (UInt32) (renderDuration * sampleRate);
AudioTimeStamp timeStamp;
memset (&timeStamp, 0, sizeof(timeStamp));
timeStamp.mFlags = kAudioTimeStampSampleTimeValid;
_audioFileWriter = [[AEAudioFileWriter alloc] initWithAudioDescription:self.audioControler.audioDescription];
AudioBufferList *buf = AEAllocateAndInitAudioBufferList(self.audioControler.audioDescription, kBufferLength);
[_audioFileWriter beginWritingToFileAtPath:path fileType:kAudioFileM4AType error:&error];
for (UInt64 i = 0; i < lengthInFrames; i += kBufferLength)
{
   AEAudioControllerRenderMainOutput(self.audioControler, timeStamp, kBufferLength, buf);
    timeStamp.mSampleTime += kBufferLength;
    OSStatus status = AEAudioFileWriterAddAudioSynchronously(_audioFileWriter, buf, kBufferLength);
    if (status != noErr) {
        NSLog(@"ERROR: %d", (int) status);
    }
}
[_audioFileWriter finishWriting];
AEFreeAudioBufferList(buf);
[self.audioControler start:nil];

zhenwei

Solved？I have the same demand.