RDKEMW-18059 : Player Failure observed with a "technical fault" OSM on performing HDMI unplug/replug

[varatharajan568]

Reason for Change:

• During HDMI unplug, the Rialto pipeline emits generic GStreamer decryption errors, which the player fails to recognize as decryption-related and does not send the correct error event to the application.
• AAMP forwards this generic error, triggering repeated media retries and re-tunes, and after seven retries, a media failure is raised along with a Technical Fault OSM.
  Changes:
• The player interface notifies AAMP when a key status change is HDCP-related, AAMP needs to handle error reporting to the application and performs a re-tune once the key status transitions back to a usable state.

Test Guidance: Refer ticket

[Copilot]

Pull request overview

Adds a new DRM callback path to surface OCDM key-status changes (notably HDCP/output-restriction related statuses) up into the player layer so AAMP can react appropriately during HDMI unplug/replug scenarios.

Changes:

• Introduces PlayerKeyStatus and a new DrmCallbacks::NotifyKeyStatus() callback.
• Maps OCDM KeyStatus → PlayerKeyStatus in OCDMSessionAdapter and invokes the callback for selected statuses.
• Adds stub implementations in unit-test fakes/mocks and a (currently logging-only) implementation in PrivateInstanceAAMP.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
middleware/drm/DrmSession.h	Adds PlayerKeyStatus enum to represent key status independent of OCDM.
middleware/drm/DrmCallbacks.h	Extends DRM callback interface with NotifyKeyStatus(PlayerKeyStatus).
middleware/drm/ocdm/opencdmsessionadapter.cpp	Converts OCDM key status to player key status and notifies the callback on updates.
priv_aamp.h	Declares PrivateInstanceAAMP::NotifyKeyStatus() override.
priv_aamp.cpp	Implements NotifyKeyStatus() (currently just logs).
test/utests/fakes/FakePrivateInstanceAAMP.cpp	Adds fake stub for NotifyKeyStatus() (currently unused parameter).
test/utests/drm/mocks/aampMocks.cpp	Adds mock stub for NotifyKeyStatus() (marks parameter unused).