[Bug 26776] Diagnosing and resolving CDM errors needs a numeric systemCode (deleted with MediaKeyError)

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26776

--- Comment #15 from Jerry Smith <jdsmith@microsoft.com> ---
I think it is correct to view system codes as performance metrics for the key
system.  They should not trigger a client response, but be returned as
telemetry to track and resolve broader issues affecting the user experience.

We've previously talked about returning these in string form with any
DOMExceptions we've defined.  That has some limitations:

1.  It's only a partial solution, since key system errors may occur at times
not associated with any defined EME use of DOMExceptions.
2.  EME DOMExceptions fire generally based on well defined operating errors and
likely aren't a complete solution for obtaining key system metrics.

If we can agree on returning this data under the MediaKeySession, I think that
would provide a more complete mechanism, and would satisfy Mark's request for
services being able to associate codes with specific session activity.

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Received on Tuesday, 16 December 2014 15:28:42 UTC