Add first-video-frame-callback signal implementation

[smudri85]

Summary: Add first-video-frame-callback signal implementation
Type: Fix
Test Plan: UT/CT, Fullstack
Jira: RDKEMW-13397

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Summary:
Type: Feature/Fix/Cleanup
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[Copilot]

Pull request overview

This PR introduces end-to-end support for a “first video frame received” notification: detecting a first-video-frame-callback GLib signal in the GStreamer pipeline, scheduling a worker task, and propagating the notification over IPC to the public client API.

Changes:

• Connect to a first-video-frame-callback signal during element setup and schedule a new FirstFrameReceived task when it fires.
• Add a new FirstFrameReceivedEvent to the IPC/proto layer and propagate it through server/client pipeline components.
• Update unit/component test scaffolding (mocks, factories, and setup-element tests) to cover the new signal/task creation.

Reviewed changes

Copilot reviewed 38 out of 38 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/unittests/media/server/mocks/gstplayer/GstGenericPlayerPrivateMock.h	Adds mock for scheduling the first-frame task.
tests/unittests/media/server/mocks/gstplayer/GstGenericPlayerClientMock.h	Adds mock client notification for first frame received.
tests/unittests/media/server/mocks/gstplayer/GenericPlayerTaskFactoryMock.h	Adds mock factory method for creating the new task.
tests/unittests/media/server/gstplayer/genericPlayer/tasksTests/SetupElementTest.cpp	Adds a unit test exercising first-video-frame callback wiring.
tests/unittests/media/server/gstplayer/genericPlayer/tasksTests/GenericPlayerTaskFactoryTest.cpp	Adds a unit test asserting the new task type is created.
tests/unittests/media/server/gstplayer/genericPlayer/common/GenericTasksTestsContext.h	Stores the first-video-frame callback in test context.
tests/unittests/media/server/gstplayer/genericPlayer/common/GenericTasksTestsBase.h	Adds helpers to set/trigger first-video-frame callback in tests.
tests/unittests/media/server/gstplayer/genericPlayer/common/GenericTasksTestsBase.cpp	Extends expectations to include first-video-frame signal discovery/connection.
tests/unittests/media/client/mocks/ipc/MediaPipelineIpcClientMock.h	Adds IPC client mock method for first frame received.
tests/unittests/media/client/ipc/mediaPipelineIpc/base/MediaPipelineIpcTestBase.h	Adds event tag + callback slot for FirstFrameReceivedEvent.
tests/unittests/media/client/ipc/mediaPipelineIpc/base/MediaPipelineIpcTestBase.cpp	Subscribes/unsubscribes to FirstFrameReceivedEvent in test base.
tests/componenttests/server/tests/mediaPipeline/UnderflowTest.cpp	Updates expectations due to additional GLib signal enumeration calls.
tests/componenttests/server/stubs/ClientStub.cpp	Subscribes component-test client stub to FirstFrameReceivedEvent.
tests/common/publicClientMocks/MediaPipelineClientMock.h	Adds public client mock method for first frame received.
proto/mediapipelinemodule.proto	Adds new FirstFrameReceivedEvent IPC message.
media/server/main/source/MediaPipelineServerInternal.cpp	Implements server-side notifyFirstFrameReceived -> public client call.
media/server/main/include/MediaPipelineServerInternal.h	Declares notifyFirstFrameReceived override.
media/server/ipc/source/MediaPipelineClient.cpp	Sends FirstFrameReceivedEvent over IPC.
media/server/ipc/include/MediaPipelineClient.h	Declares new IMediaPipelineClient notification implementation.
media/server/gstplayer/source/Utils.cpp	Adds signal-name discovery helper for first-video-frame-callback.
media/server/gstplayer/source/tasks/generic/SetupElement.cpp	Connects first-video-frame callback when signal exists on a video element.
media/server/gstplayer/source/tasks/generic/GenericPlayerTaskFactory.cpp	Adds factory creation for FirstFrameReceived task.
media/server/gstplayer/source/tasks/generic/FirstFrameReceived.cpp	New worker task that notifies the GstGenericPlayer client.
media/server/gstplayer/source/GstGenericPlayer.cpp	Schedules FirstFrameReceived task from signal callback path.
media/server/gstplayer/interface/IGstGenericPlayerClient.h	Adds notifyFirstFrameReceived(MediaSourceType) API.
media/server/gstplayer/include/Utils.h	Declares getFirstVideoFrameSignalName helper.
media/server/gstplayer/include/tasks/IGenericPlayerTaskFactory.h	Adds createFirstFrameReceived factory API.
media/server/gstplayer/include/tasks/generic/GenericPlayerTaskFactory.h	Declares createFirstFrameReceived in concrete factory.
media/server/gstplayer/include/tasks/generic/FirstFrameReceived.h	Declares new FirstFrameReceived task type.
media/server/gstplayer/include/IGstGenericPlayerPrivate.h	Adds scheduleFirstVideoFrameReceived() hook.
media/server/gstplayer/include/GstGenericPlayer.h	Implements the new scheduling method in GstGenericPlayer.
media/server/gstplayer/CMakeLists.txt	Adds FirstFrameReceived.cpp to build.
media/public/include/IMediaPipelineClient.h	Extends public client API with notifyFirstFrameReceived(sourceId).
media/client/main/source/MediaPipeline.cpp	Forwards first-frame notification to the public client.
media/client/main/include/MediaPipeline.h	Declares notifyFirstFrameReceived override.
media/client/ipc/source/MediaPipelineIpc.cpp	Subscribes/handles FirstFrameReceivedEvent and forwards to IPC client.
media/client/ipc/interface/IMediaPipelineIpcClient.h	Adds IPC client interface method notifyFirstFrameReceived.
media/client/ipc/include/MediaPipelineIpc.h	Declares onFirstFrameReceived event handler.

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[balasaraswathy-n]

IGstGenericPlayerPrivate &player is not required under FirstFrameReceived.cpp,

[github-actions]

Coverage statistics of your commit:
WARNING: Lines coverage decreased from: 84.3% to 84.1%
WARNING: Functions coverage decreased from: 92.6% to 92.4%

[Copilot]

Pull request overview

Copilot reviewed 55 out of 55 changed files in this pull request and generated 6 comments.

[github-actions]

Coverage statistics of your commit:
Congratulations, your commit improved lines coverage from: 84.2% to 84.3%
Functions coverage stays unchanged and is: 92.6%