objective-c - ExtAudioFileWriteAsync上的EXC_BAD_ACCESS

Question

我在“麦克风/线路输入音频渲染回调”的末尾添加了以下代码。

但是，该应用始终会崩溃，并带有EXC_BAD_ACCESS:

err = ExtAudioFileWriteAsync(mOutputAudioFile, inNumberFrames, ioData);

其余代码如下:

ExtAudioFileRef mOutputAudioFile;
    AudioFileID mAfid;
    NSLog(@"Writing output to file ....");

    NSArray *dirPaths;
    NSString *docsDir;
    dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    docsDir = [dirPaths objectAtIndex:0];
    NSLog(@"docDir = %@", docsDir);
    NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"sound.caf"];
    NSURL *inPath = [NSURL fileURLWithPath:soundFilePath];
    NSLog(@"Output file path is : %@", inPath);

    AudioStreamBasicDescription mStreamFormat;

    mStreamFormat.mChannelsPerFrame     = 1;
    mStreamFormat.mSampleRate           = 44100.00;
    mStreamFormat.mFormatID             = kAudioFormatLinearPCM;
    mStreamFormat.mFormatFlags          = kAudioFormatFlagIsBigEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
    mStreamFormat.mBitsPerChannel       = 16;
    mStreamFormat.mBytesPerFrame        = 2;
    mStreamFormat.mFramesPerPacket      = 1;
    mStreamFormat.mBytesPerPacket       = 2;
    mStreamFormat.mReserved             = 0;


    err = AudioFileCreateWithURL((CFURLRef)inPath, kAudioFileCAFType, &mStreamFormat, kAudioFileFlags_EraseFile, &mAfid);
    if (err != noErr) {
        NSLog(@"ERROR : Audio file could not be created !! %d", (int)err);

    }
    err = ExtAudioFileWrapAudioFileID(mAfid, true, &mOutputAudioFile);
    err = ExtAudioFileSetProperty(mOutputAudioFile, kExtAudioFileProperty_ClientDataFormat, sizeof(AudioStreamBasicDescription), &mStreamFormat);
    if (ioData) {
        err = ExtAudioFileWriteAsync(mOutputAudioFile, inNumberFrames, ioData);
        if (err != noErr) {
            NSLog(@"ERROR : Audio file could not be written !! %d", (int)err);
        }
    }
    else {

        NSLog(@"No ioData found");
    }
    NSLog(@"Done writing output to file ....");

我已经尝试了一切。如果有人可以帮助我解决该问题，我将非常感谢。谢谢 !

更新1:

如果我使用ExtAudioFileWrite而不是ExtAudioFileWriteAsync，则该应用不会崩溃，但ExtAudioFileWrite返回错误-50。

我仍然不知道这是怎么回事。非常感谢在这方面的任何帮助。

谢谢。

Answer 1

答案中张贴的示例代码回答了我所有的问题:

Can anybody help me in recording iPhone output sound through Audio Unit

非常感谢大家的帮助。