Can't get the plugin load in Catalina #7
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Actually I got to the point where Cameo as well as system_profiler SPCameraDataType hangs as soon as I put SampleVCam.plugin into CoreMediaIO/Plig-ins/DAL |
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Narrowed it down to |
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I figured it out. It was crashing in the assistant server and therefore the plugin couldn't communicate with it via mach_msg. mFrameCount = ftell(mSequenceFile) / mFrameSize; to: mFrameCount = MAX(1, ftell(mSequenceFile) / mFrameSize); |
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@videolist were you able to get this working then? How were you able to debug it? My assistant is crashing as well. It looks like it's when EmitFrame is called. |
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@videolist I had the same problem -- it's because the Instead, what you can do is download the videos from the original Apple sample page and overwrite the git-lfs stubs ( |
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@johnboiles thanks for linking the alternate download location, indeed LFS has been suspended for my account because a surge of downloads consumed my quota. 🤷♂ |
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The DAL plugin (SampleVCam.plugin) needs to be installed (copied) into /Library/CoreMediaIO/Plug-ins/DAL then it won’t crash. Since the assistant is looking for the file in the plug-in bundle. I’ll make sure it doesn’t crash though if its not installed.
… On Mar 17, 2020, at 7:54 PM, Alexander ***@***.***> wrote:
@videolist <https://github.com/videolist> were you able to get this working then? How were you able to debug it?
My assistant is crashing as well. It looks like it's when EmitFrame is called.
Time Awake Since Boot: 66 seconds
System Integrity Protection: disabled
Crashed Thread: 2
Exception Type: EXC_ARITHMETIC (SIGFPE)
Exception Codes: EXC_I386_DIV (divide by zero)
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Floating point exception: 8
Termination Reason: Namespace SIGNAL, Code 0x8
Terminating Process: exc handler [646]
Application Specific Information:
dyld2 mode
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff78fff21a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff78fff768 mach_msg + 60
2 libsystem_kernel.dylib 0x00007fff7901674a mach_msg_server + 378
3 SampleVCamAssistant 0x0000000104d32056 main + 646 (CMIO_DPA_Sample_VCamServer.cpp:89)
4 libdyld.dylib 0x00007fff78eca3d5 start + 1
Thread 1:
0 libsystem_kernel.dylib 0x00007fff79002866 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff790c156e _pthread_cond_wait + 722
2 SampleVCamAssistant 0x0000000104cf26bf CAGuard::Wait() + 191 (CAGuard.cpp:120)
3 SampleVCamAssistant 0x0000000104d21b09 CAGuard::Locker::Wait() + 25 (CAGuard.h:118)
4 SampleVCamAssistant 0x0000000104d27e40 CMIO::DPA::Sample::Server::Deck::SimulationEntry(CMIO::DPA::Sample::Server::Deck&) + 384 (CMIO_DPA_Sample_Server_Deck.cpp:518)
5 SampleVCamAssistant 0x0000000104cf3798 CAPThread::Entry(CAPThread*) + 280 (CAPThread.cpp:315)
6 libsystem_pthread.dylib 0x00007fff790be2eb _pthread_body + 126
7 libsystem_pthread.dylib 0x00007fff790c1249 _pthread_start + 66
8 libsystem_pthread.dylib 0x00007fff790bd40d thread_start + 13
Thread 2 Crashed:
0 SampleVCamAssistant 0x0000000104d3250a CMIO::DPA::Sample::Server::VCamDevice::EmitFrame(void*) + 90
1 libsystem_pthread.dylib 0x00007fff790be2eb _pthread_body + 126
2 libsystem_pthread.dylib 0x00007fff790c1249 _pthread_start + 66
3 libsystem_pthread.dylib 0x00007fff790bd40d thread_start + 13
Thread 3:
0 libsystem_pthread.dylib 0x00007fff790bd3f0 start_wqthread + 0
Thread 2 crashed with X86 Thread State (64-bit):
rax: 0x6674616c50540010 rbx: 0x000070000864e000 rcx: 0x00007fa3e550d9f0 rdx: 0x0000000000000000
rdi: 0x00007fffaf647030 rsi: 0x0000000000000000 rbp: 0x000070000864df10 rsp: 0x000070000864dec0
r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000001 r11: 0x0000000000000247
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000
rip: 0x0000000104d3250a rfl: 0x0000000000010246 cr2: 0x00007fffecf7d002
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@videolist Do you know if I need to install the kext as well? I'm building on Catalina without errors, but after adding |
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No kext doesn’t need to be installed but Assistant needs to be run. So far we have been running in manually. To get it autostart on boot com.apple.cmio.DPA.SampleVCam.plist needs to be placed in /Library/LaunchDemons and /Library/LaunchAgents folder (though I think only the latter is important)
Just pushed updated plist.
… On Mar 31, 2020, at 7:26 PM, Ben Syverson ***@***.***> wrote:
@videolist <https://github.com/videolist> Do you know if I need to install the kext as well? I'm building on Catalina without errors, but after adding SampleVCam.plugin, I don't see anything in Cameo.
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@videolist Gotcha, that worked, thanks! Just FYI if you committed that change, it didn't get pushed to this repo. |
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Ws able to compile successfully but can't get any of the plugins (Sample or SampleVCam) to load. I am using your Cameo tool to browse the DALs (super nice tool, love those Swift wrappers). But I don't see them there. I wonder if it's a signing issue or I am missing some important steps in how to register them with the system. Any pointers?
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