Re: Edirol FA-101 and CoreAudio (Jeff Moore)
Re: Edirol FA-101 and CoreAudio (Jeff Moore)
- Subject: Re: Edirol FA-101 and CoreAudio (Jeff Moore)
- From: William Stewart <email@hidden>
- Date: Tue, 13 Sep 2005 12:10:40 -0700
On 13/09/2005, at 5:28 AM, Roni Music wrote:
Subject: Re: Edirol FA-101 and CoreAudio
If you look closely, the crash is happening on the IO thread. From
the back trace, I'd guess that it is happennig inside an
AudioConverter or the the Render method of an AudioUnit somewhere.
It happens when my input callback calls AudioUnitRender()
(exactly the same as in the "afrecord" example or TN 2091)
Are you preparing the Audio Buffer List you pass to AudioUnitRender
*every* time? You could have a problem where you start off with a
NULL buffer list, you get back a buffer list with pointers, something
about the device changes and those pointers (which weren't yours to
begin with) are now changed and you crash.
I've seen crashes like this in the past with similar symptoms.
Bill
My guess is that the reason for the crash is that your app has
encountered a NULL buffer where it didn't expect to find one and
passed it to the converter or AU in question.
All memory buffers are valid at this point.
They are deleted as the last thing in my destructor, so they are
valid,
unless the following calls returns before they have performed what
they are supposed to do.
AudioOutputUnitStop(mInputUnit);
AudioUnitUninitialize(mInputUnit);
CloseComponent(mInputUnit);
At this point the AURenderCallback should never ever be called
again, right?
So now it should be safe to destroy all memory.
The crash happens only when closing down the recording stuff, else
it works fine.
The custommer also reports that everything worked OK untill he
upgraded to Tiger
I have never experienced the problem myself on any version of OS X
My software is built with XCode 2.1 using gcc 3.3 if that matters
Rolf / Roni Music
On Sep 12, 2005, at 2:07 AM, Roni Music wrote:
I have a crasch that only occurs with the Edirol FA-101 FireWire
interface and Tiger for one of my custommers.
--
Jeff Moore
Core Audio
Apple
Thread 4 Crashed:
0 <<00000000>> 0xffff8b2c __memcpy + 908 (cpu_capabilities.h:189)
1 ...pple.audio.units.Components 0x9a2efa08
dyld_stub__keymgr_get_and_lock_processwide_ptr + 33288
2 ...pple.audio.units.Components 0x9a2ef974
dyld_stub__keymgr_get_and_lock_processwide_ptr + 33140
3 ...pple.audio.units.Components 0x9a224d10 DefaultOutputAUEntry +
29112
4 ...pple.audio.units.Components 0x9a2210e4 DefaultOutputAUEntry +
13708
5 ...pple.audio.units.Components 0x9a220b3c DefaultOutputAUEntry +
12260
6 ...pple.audio.units.Components 0x9a2f15a4
dyld_stub__keymgr_get_and_lock_processwide_ptr + 40356
7 ...ple.CoreServices.CarbonCore 0x90b51ff0 CallComponent + 260
8 ...apple.audio.units.AudioUnit 0x94179cc4 AudioUnitRender + 56
9 com.ronimusic.audiocompanion 0x00030b9c
CMyAudioFileRecorder::InputProc(void*, unsigned long*,
AudioTimeStamp const*, unsigned long, unsigned long,
AudioBufferList*) + 204 (CMyAudioFileRecorder.cpp:547)
10 ...pple.audio.units.Components 0x9a2245d0 DefaultOutputAUEntry +
27256
11 com.apple.audio.CoreAudio 0x913b74e0 IOA_Device::CallIOProcs
(AudioTimeStamp const&, AudioTimeStamp const&, AudioTimeStamp
const&) + 376
12 com.apple.audio.CoreAudio 0x913b71f4 HP_IOThread::PerformIO
(AudioTimeStamp const&) + 532
13 com.apple.audio.CoreAudio 0x913b5230 HP_IOThread::WorkLoop() + 1156
14 com.apple.audio.CoreAudio 0x913b4d98 HP_IOThread::ThreadEntry
(HP_IOThread*) + 16
15 com.apple.audio.CoreAudio 0x913a5f7c CAPThread::Entry
(CAPThread*) + 96
16 libSystem.B.dylib 0x9002c3d4 _pthread_body + 96
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