EXC_BAD_ACCESS上ExtAudioFileWriteAsync [英] EXC_BAD_ACCESS on ExtAudioFileWriteAsync

问题描述

我添加了以下code。在话筒/线路年底在音频渲染回调。

I have added the following code at the end of the Mic / Line In Audio Rendering Callback.

但应用程序保持与EXC_BAD_ACCESS崩溃上：

But the app keeps crashing with EXC_BAD_ACCESS on :

err = ExtAudioFileWriteAsync(mOutputAudioFile, inNumberFrames, ioData);

在code的其余部分如下：

The rest of the code is as follows :

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 ....");

我已经试过几乎与此一切。我将非常感激，如果有人可以帮助我解决这个问题。谢谢！

I have tried almost everything with this. I would be extremely thankful if somebody could help me resolve it. Thanks !

更新1：

如果我用ExtAudioFileWrite代替ExtAudioFileWriteAsync，应用程序不会崩溃，但返回错误-50为ExtAudioFileWrite。

If I use ExtAudioFileWrite instead of ExtAudioFileWriteAsync, the app doesn't crash, but returns error -50 for ExtAudioFileWrite.

我仍然不知道发生了什么与它发生。在这方面的任何帮助是非常AP preciated。

I still have no idea what's happening with it. Any help in this regard is much appreciated.

感谢。

推荐答案

样品code张贴在这里的答案回答了我所有的问题：

The sample code posted in the answer here answered all my questions :

<一个href=\"http://stackoverflow.com/questions/8615358/can-anybody-help-me-in-recording-iphone-output-sound-through-audio-unit\">Can任何人帮助我​​通过音频单元

非常感谢大家的帮助。

这篇关于EXC_BAD_ACCESS上ExtAudioFileWriteAsync的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！