AUConverter format flags non-interleaved

Subject: AUConverter format flags non-interleaved
From: Benjamin Rindt <email@hidden>
Date: Thu, 11 Jul 2013 16:52:10 +0200

Hey guys,

I have an Inputdevice which is giving me interleaved audio channels. But I need them to be non-interleaved. I read that the AUConverter can convert interleaved->non interleaved but I don't know how to set the stream format to get it working. The player->stream format is interleaved (with 4 channels) but I need it to be non-interleaved 4 channels.

Well I thought, take the player->stream format and set it somehow to non-interleaved then I don't have to worry to loose some other values of the stream format.

My Code is this:

    AudioComponentDescription auconverterDesc = {0};
    auconverterDesc.componentType = kAudioUnitType_FormatConverter;
    auconverterDesc.componentSubType = kAudioUnitSubType_AUConverter;
    auconverterDesc.componentManufacturer = kAudioUnitManufacturer_Apple;
    
    AudioUnit auconverter;
    
    AudioStreamBasicDescription convertAsbd;
    convertAsbd = player->streamFormat;
    
        //make some magic to get it non interleaved??
    convertDesc.mFormatFlags = ???;
    
    CheckError(AudioUnitSetProperty(auconverter, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &convertAsbd, sizeof(AudioStreamBasicDescription))
               , "streamformat inputmixer output ");
    CheckError(AudioUnitSetProperty(auconverter, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &player->streamFormat, sizeof(AudioStreamBasicDescription))
               , "streamformat inputmixer output ");

I cut out the AUgraph node stuff, doesn't matter here.

Thanks in advance!

Benjamin

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