5
私たちの声を録音するためにオーディオユニットを使用しています。私のコールバック関数では、AudioBufferListのデータを取得しています。このバッファをファイルに格納する必要があります。ExtAudioFileWriteAsyncのEXC_BAD_ACCESS
問題があります。バッファを.cafファイルに格納しようとすると、アプリケーションがクラッシュしています。以下はコードです。
AudioStreamBasicDescription audioFormat;
audioFormat.mSampleRate = 44100.00;
audioFormat.mFormatID = kAudioFormatLinearPCM;
audioFormat.mFormatFlags = kAudioFormatFlagsCanonical;
audioFormat.mBytesPerPacket = 2;
audioFormat.mFramesPerPacket = 1;
audioFormat.mBytesPerFrame = 2;
audioFormat.mChannelsPerFrame = 1;
audioFormat.mBitsPerChannel = 16;
audioFormat.mReserved = 0;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
if(![[NSFileManager defaultManager] fileExistsAtPath:documentsDirectory])
[[NSFileManager defaultManager] createDirectoryAtPath:documentsDirectory withIntermediateDirectories:YES attributes:nil error:nil];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"audio.caf"];
if(![[NSFileManager defaultManager] fileExistsAtPath:path])
NSLog(@"file not exist.");
NSLog(@"Path : %@", path);
THIS->url = [NSURL fileURLWithPath:[path retain]];
err = ExtAudioFileCreateWithURL((CFURLRef)THIS->url, kAudioFileCAFType, &audioFormat, NULL, kAudioFileFlags_EraseFile, &THIS->fOutputAudioFile);
if(err != noErr){
printf("create with url: error %d\n", (int)err);
}
THIS->state = 2;
err = ExtAudioFileSetProperty(THIS->fOutputAudioFile, kExtAudioFileProperty_ClientDataFormat, (UInt32)sizeof(audioFormat), &audioFormat);
if(err != noErr){
printf("file set property: error %d\n", (int)err);
}
err = ExtAudioFileWriteAsync(THIS->fOutputAudioFile, 0, NULL);
if(err != noErr){
printf("write async: error %d\n", (int)err);
return err;
}
[pool release];
err = ExtAudioFileWriteAsync(THIS->fOutputAudioFile, ioData->mNumberBuffers, ioData);
if(err != noErr){
printf("file write async: error %d\n", (int)err);
return err;
}
ERROR:
Program received signal: “EXC_BAD_ACCESS”.
#0 0x30d04bb2 in memmove()
#1 0x33ba1d1e in AudioRingBuffer::Store()
#2 0x33c2269e in ExtAudioFile::WriteFramesAsync()
#3 0x33c278c8 in ExtAudioFileWriteAsync()
#4 0x00002e74 in PerformThru (inRefCon=0x14d9f0, ioActionFlags=0x2ffe77d4, inTimeStamp=0xa896fc, inBusNumber=0, inNumberFrames=256, ioData=0x14f680) at /Alex/project/ProStudio/TestAudioUnit/Classes/TestAudioUnitAppDelegate.mm:399
#5 0x33b70896 in AUInputElement::PullInput()
#6 0x33b794a0 in AUInputFormatConverter2::InputProc()
#7 0x33b5560e in AudioConverterChain::CallInputProc()
#8 0x33b5555e in AudioConverterChain::FillBufferFromInputProc()
#9 0x33b5537c in BufferedAudioConverter::GetInputBytes()
#10 0x33b79390 in CBRConverter::RenderOutput()
#11 0x33b5505a in BufferedAudioConverter::FillBuffer()
#12 0x33b55362 in BufferedAudioConverter::GetInputBytes()
#13 0x33b79390 in CBRConverter::RenderOutput()
#14 0x33b5505a in BufferedAudioConverter::FillBuffer()
#15 0x33b551ae in AudioConverterChain::RenderOutput()
#16 0x33b5505a in BufferedAudioConverter::FillBuffer()
#17 0x33b54e2a in AudioConverterFillComplexBuffer()
#18 0x33b78f58 in AUConverterBase::RenderBus()
#19 0x33c08eea in AURemoteIO::RenderBus()
#20 0x33b5666e in AUBase::DoRender()
#21 0x33c09698 in AURemoteIO::PerformIO()
#22 0x33c09962 in AURIOCallbackReceiver_PerformIO()
#23 0x33c02448 in _XPerformIO()
#24 0x33b71bea in mshMIGPerform()
#25 0x33bd7de0 in MSHMIGDispatchMessage()
#26 0x33c0ebae in AURemoteIO::IOThread::Entry()
#27 0x33b4a1d8 in CAPThread::Entry()
#28 0x30d7d88c in _pthread_start()
#29 0x30d72a90 in thread_start()
この問題を解決するためにいくつかのいずれかを助けてください。
ExtAudioFileCreateWithURLを使用してファイルを作成しようとしましたが、エラーは発生しません(エラーコードは0です)。しかし、null値を持つExtAudioFileRef(0xfd000など)。なぜそれがヌル値を与えているのですか? – jfalexvijay