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Re: MIDI driver hibernation problem
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Re: MIDI driver hibernation problem


  • Subject: Re: MIDI driver hibernation problem
  • From: Daniel Mack <email@hidden>
  • Date: Thu, 27 Mar 2008 00:47:37 +0800

Hi,

On Mar 27, 2008, at 12:18 AM, Doug Wyatt wrote:
A client application is calling MIDIPortDisconnectSource. It's not the MIDIServer, and not the CoreMIDI client framework.

As I said, the same thing happens with Echo.cpp from the SampleTools that ship with Xcode. Certainly, there is no MIDIPortDisconnectSource in that code, I just double checked that. So what else than the MIDIServer is in the chain that could be possibly blamed for that?


Daniel

On Mar 25, 2008, at 18:59 , Daniel Mack wrote:

Hi Doug,

On Mar 26, 2008, at 6:14 AM, Doug Wyatt wrote:
Please write a Radar including a backtrace from MyMIDIDriver::EnableSource(0)

This is the backtrace of the MIDIServer process when machine is put to sleep:


#0 MyMIDIDriver::EnableSource (this=0x30ced0, src=0x80752c, enabled=0 '\0') at MyMIDIDriver:592
#1 0x000d6b3c in MIDIDriverEnableSource (self=0x30ced4, src=0x80752c, enabled=0 '\0') at MIDIDriver.cpp:153
#2 0x0006829b in MIDISource::DisconnectPort ()
#3 0x00073460 in MIDIPortDisconnectSource ()
#4 0x00070d8e in MIDIServerMessagePort::ReceiveMessage ()
#5 0x927c3e21 in __CFMessagePortPerform ()
#6 0x927e5921 in CFRunLoopRunSpecific ()
#7 0x927e5d74 in CFRunLoopRun ()
#8 0x00076dc9 in MIDIServerRun ()
#9 0x00001fb1 in ?? ()
#10 0x00001f5e in ?? ()


Same things happens with /Developer/Examples/CoreAudio/MIDI/ SampleTools/Echo.cpp, btw. So I think it's the MIDIServer's fault rather than the application's.

This is filed as #5820631 now.

Best regards,
Daniel


-- Doug Wyatt Core Audio, Apple


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  • Follow-Ups:
    • Re: MIDI driver hibernation problem
      • From: Doug Wyatt <email@hidden>
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      • From: Jeremy Sagan <email@hidden>
References: 
 >MIDI driver hibernation problem (From: Daniel Mack <email@hidden>)
 >Re: MIDI driver hibernation problem (From: Daniel Mack <email@hidden>)
 >Re: MIDI driver hibernation problem (From: Doug Wyatt <email@hidden>)

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