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  1. #1
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    May 2007
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    Unhappy CMdaAudioOutputStream Open returns -16

    I'm having trouble setting up the output stream. On my test device (N95) the call to CMdaAudioOutputStream::Open completes, but the call back to MaoscOpenComplete returns with an error value of -16 (Server Busy).... is there something I need to do before calling open, or is my test device just screwed?

  2. #2
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    Re: CMdaAudioOutputStream Open returns -16

    Update - I did a factory reset on the N95. Still getting the same error. Code for opening is as follows:
    Code:
    	iStream->SetPriority(EMdaPriorityMax, EMdaPriorityPreferenceQuality);
    	iStreamSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;
    	iStreamSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;
    	iStream->Open(&iStreamSettings);
    Any ideas? This is getting me stummped!
    Emulator = ok. On device = server busy
    Developer = very confused

  3. #3
    Nokia Developer Moderator
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    Re: CMdaAudioOutputStream Open returns -16

    I used the same settings, just without the priority magic. Theoretically it should not make any harm, since my guess would be that you do not have MultimediaDD capability.
    Quote Originally Posted by SDK Help
    For applications that do not have the MultimediaDD capability, any supplied priority level (aPriority) or priority preference (aPref) will be ignored.
    But apparently it may still do something bad for you.

  4. #4
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    Re: CMdaAudioOutputStream Open returns -16

    Thanks for the suggestion. I changed the code and commented out the offending line as follows, and still no luck:

    //iStream->SetPriority(EMdaPriorityMax, EMdaPriorityPreferenceQuality);
    iStreamSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;
    iStreamSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;
    iStream->Open(NULL); //&iStreamSettings);

  5. #5
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    Re: CMdaAudioOutputStream Open returns -16

    And also as follows (re-inserted the setting information contained in the call to Open)
    Code:
    	//iStream->SetPriority(EMdaPriorityMax, EMdaPriorityPreferenceQuality);
    	iStreamSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;
    	iStreamSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;
    	iStream->Open(&iStreamSettings);
    And still -16 (Hair pulling time) -

  6. #6
    Nokia Developer Moderator
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    Re: CMdaAudioOutputStream Open returns -16

    Exactly when and where do you get that KErrServerBusy?

  7. #7
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    Re: CMdaAudioOutputStream Open returns -16

    I get the -16 error code in the open complete call back here:
    Code:
    void CMfAudioStreamPlayer::MaoscOpenComplete(TInt aError)
    	{
    	if ( aError == KErrNone )
    		{
    		iDataHandlingStatus = EReadyForData;
    		SetVolume(50);
    		}
    	else
    		{
    		CloseStream();
    		iErrorHandling.SignalError(MMfCentralErrorHandling::ECanNotOpenAudioStream, aError);
    		}
    	}
    aError == -16, KErrServerBusy

  8. #8
    Nokia Developer Moderator
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    Re: CMdaAudioOutputStream Open returns -16

    Somehow I am starting to have the feeling that you are doing something else too. In that case you should interpret KErrServerBusy as it is: the server is busy.
    For example if you are planning some full-duplex magic, and you happen to Open a CMdaAudioInputStream at the same time, that will not work, I have also done that. However you can freely open your CMdaAudioOutputStream from MaisOpenComplete, and that will work. The same applies to opening anything else (like CMdaAudioPlayerUtility or CMdaAudioToneUtility).

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