RDKEMW-20330: [Glass G1 UK -R40.23][Dhruv -40.11]observed "com.comcast.viper" crash on VIPA enabled devices contributing BERR/TECHFAULTOTT with fingerprint 61111371

[ALSAMEEMA]

No description provided.

[Copilot]

Pull request overview

This PR aims to prevent a crash in the CDMI decryptor path on VIPA-enabled devices by ensuring decryption isn’t attempted until valid sink caps are available (and by hardening caps validation in the OCDM session adapter).

Changes:

• Added a dedicated condition variable to signal/wait for sinkCaps availability in gstcdmidecryptor.
• Introduced a short timed wait (500ms) for caps negotiation completion before decrypt, plus additional NULL-guarding around sinkCaps.
• Hardened OCDMGSTSessionAdapter::decrypt() to validate caps is non-null and a real GstCaps before calling gst_caps_is_empty().

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
gst-plugins/drm/gst/gstcdmidecryptor.h	Adds sinkCapsCond to coordinate caps availability with decrypt path.
gst-plugins/drm/gst/gstcdmidecryptor.cpp	Initializes/clears sinkCapsCond, signals on sink caps update, and waits/guards to avoid decrypt with NULL sinkCaps.
drm/ocdm/OcdmGstSessionAdapter.cpp	Adds caps != nullptr check to prevent crashes when caps is invalid/null.

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