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POis __cxa_throw safe to ignore with Core Audio?
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copied!<p>A similar <a href="https://stackoverflow.com/questions/12861748/how-do-i-know-when-safe-to-ignore-cxa-throw-on-an-all-exceptions-breakpoint">question</a> has been asked.. but I wanted to make it more specific to core audio.. as some of us may have noticed core audio has very little room for error.</p> <p>As the <a href="https://stackoverflow.com/a/12861939/766570">answer</a> to the said question explains, __cxa_throw is a C++ <a href="http://www.cocoabuilder.com/archive/xcode/272954-exception-breakpoint-failure.html" rel="nofollow noreferrer">unhandled exception</a>, which can be ignored (this problem seems to be new with Xcode 4.5.1.. I've never seen it before as well)</p> <p>can we say the same about core audio? What makes me nervous is that it has to do with formatting of the audio.. which a lot of my code depends on:</p> <p>I'm trying to convert an AAC file unto lPCM.. </p> <p><b>output format:</b></p> <pre><code>// set up the PCM output format for conversion streamer->PCMoutputFormat.mSampleRate = 44100.0; streamer->PCMoutputFormat.mFormatID = kAudioFormatLinearPCM; streamer->PCMoutputFormat.mFormatFlags = kAudioFormatFlagsCanonical; streamer->PCMoutputFormat.mBytesPerPacket = 4; streamer->PCMoutputFormat.mFramesPerPacket = 1; streamer->PCMoutputFormat.mBytesPerFrame = 4; streamer->PCMoutputFormat.mChannelsPerFrame = 2; streamer->PCMoutputFormat.mBitsPerChannel = 16; </code></pre> <p><b>input format:</b></p> <pre><code>mSampleRate = 44100 mFormatID = 1633772320 (AAC) mFormatFlags = 0 mBytesPerPacket = 0 mFramesPerPacket = 1024 mBytesPerFrame = 0 mChannelsPerFrame = 2 mBitsPerChannel = 0 </code></pre> <p><b>instance variables:</b></p> <p>game.h</p> <pre><code>@interface Game : NSObject <GKSessionDelegate> { AudioStreamer *streamer; } @property (nonatomic, assign) AudioStreamBasicDescription mediaItemInputFormat; </code></pre> <p>audioStreamer.h</p> <pre><code>@interface AudioStreamer : NSObject { @public AudioStreamBasicDescription PCMoutputFormat; AudioConverterRef audioConverter; } </code></pre> <p><b>setting up converter command in game.m</b> (this is where the __cxa_throw unhandled exception is thrown!)</p> <pre><code>// set up converter OSStatus result = AudioConverterNew(&_mediaItemInputFormat, &streamer->PCMoutputFormat, &streamer->audioConverter); </code></pre>

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