Bug 196573 – Add logging and ASSERTs to investigate issue with VPModuleInitialize

• Component: WebRTC
• Status: RESOLVED FIXED

[youenn fablet]

Add logging and ASSERTs to investigate issue with VPModuleInitialize

[youenn fablet]

Created attachment 366663 [details]
Patch

[youenn fablet]

Created attachment 366688 [details]
Patch

[Eric Carlson]

Comment on attachment 366688 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=366688&action=review

> Source/ThirdParty/libwebrtc/Source/webrtc/sdk/WebKit/VideoProcessingSoftLink.cpp:81
> +    if (!library)
> +        fprintf(stderr, "Cannot find VideoProcessingLibrary: %s\n", dlerror());
> +    softLinkVideoProcessingVPModuleInitialize = (void (*)()) dlsym(library, "VPModuleInitialize");
> +    if (!softLinkVideoProcessingVPModuleInitialize)
> +        fprintf(stderr, "Cannot find function VPModuleInitialize: %s\n", dlerror());

Is it OK that we will crash after logging either of these errors? Is it possible to fall back to use an alternative library if this fails?

[youenn fablet]

(In reply to Eric Carlson from comment #3)
> Comment on attachment 366688 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=366688&action=review
> 
> > Source/ThirdParty/libwebrtc/Source/webrtc/sdk/WebKit/VideoProcessingSoftLink.cpp:81
> > +    if (!library)
> > +        fprintf(stderr, "Cannot find VideoProcessingLibrary: %s\n", dlerror());
> > +    softLinkVideoProcessingVPModuleInitialize = (void (*)()) dlsym(library, "VPModuleInitialize");
> > +    if (!softLinkVideoProcessingVPModuleInitialize)
> > +        fprintf(stderr, "Cannot find function VPModuleInitialize: %s\n", dlerror());
> 
> Is it OK that we will crash after logging either of these errors? Is it
> possible to fall back to use an alternative library if this fails?

This patch is merely trying to investigate things and it is good to continue crashing to further investigate.
If we do not find a solution, we could try to skip calling VPModuleInitialize.
It might be that encoding would fail or would fallback to the regular VTB encoder.

[WebKit Commit Bot]

Comment on attachment 366688 [details]
Patch

Clearing flags on attachment: 366688

Committed r243850: <https://trac.webkit.org/changeset/243850>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/49590120>