1864027 - [wmfme] use `IMFExtendedDRMTypeSupport::IsTypeSupportedEx` to check the capabilites for PlayReady

Status: RESOLVED FIXED

(Core :: Audio/Video: Playback, task, P1)

Description

[Alastor Wu [:alwu]]

We found that PlayReady doesn't return correct capabilies when we call IMFContentDecryptionModuleFactory::IsTypeSupported.

After confirming with Microsoft, they told me that for PlayReady we need to use another method IMFExtendedDRMTypeSupport::IsTypeSupportedEx. But Widevine implements IMFContentDecryptionModuleFactory::IsTypeSupported well.

Comment 1

[Alastor Wu [:alwu]]

Attachment: Bug 1864027 - part1 : use `IMFExtendedDRMTypeSupport::IsTypeSupportedEx` to check the capabilites for PlayReady.

We found that PlayReady doesn't return correct capabilies when we call
IMFContentDecryptionModuleFactory::IsTypeSupported.

After confirming with Microsoft, they told us that for PlayReady we need
to use another method IMFExtendedDRMTypeSupport::IsTypeSupportedEx.

In contrast, Widevine implements IsTypeSupported well, so it doesn't
need to use another method.

Comment 2

[Alastor Wu [:alwu]]

Attachment: Bug 1864027 - part2 : remove workaround for checking HWDRM.

That workaround was added for PlayReady before because it didn't return
correct result from IsTypeSupport. As we don't use IsTypeSupport for
PlayReady anymore and Wideinve seems always returning correct result, we
can remove that workaround.

Depends on D193231

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/5d297cad78f4
part1 : use `IMFExtendedDRMTypeSupport::IsTypeSupportedEx` to check the capabilites for PlayReady. r=jolin
https://hg.mozilla.org/integration/autoland/rev/f0567d6897d8
part2 : remove workaround for checking HWDRM. r=jolin

Comment 4

[Iulian Moraru]

https://hg.mozilla.org/mozilla-central/rev/5d297cad78f4
https://hg.mozilla.org/mozilla-central/rev/f0567d6897d8