Add support to <dashif:Laurl>

[0xAllDe]

Have you read the Tutorials?
Yes

Have you read the FAQ and checked for duplicate open issues?
Yes

What version of Shaka Player are you using?
4.3

Please ask your question
I trying to play clear key licensing server using dashif:laurl but shaka-player return 6012 error.
I know Dash-IF lastest security guidelines is <dashif:laurl>
https://dashif-documents.azurewebsites.net/Guidelines-Security/master/Guidelines-Security.html#CPS-mpd-drm-config

I wondering, is shaka-player sopport <dashif:laurl>? If it is, why I receive 6012 error?

tested <ContentProtection> Element like this

<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b" value="ClearKey1.0">
        <cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAEbdF33h/WzyyI+2iPFMZsxAAAAAA==</cenc:pssh>
        <dashif:Authzurl>https://some.com/authorize</dashif:Authzurl>
        <dashif:laurl>http://licenseserver.com/AcquireLicense</dashif:laurl>
</ContentProtection>

Thanks to read my question.

[joeyparrish]

No, not yet, but it could be added. We support the older MS PlayReady variant of that already ms:laurl, so there's no reason we couldn't support dash:laurl as well.

I'll convert this into a feature request. PRs are welcome!

[avelad]

@bttop83 if you share a manifest(url), I can work in this feature. Thanks!