RDKEMW-13073: L1 test case fail for playerisobmff module

[ALSAMEEMA]

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[Copilot]

Pull request overview

This PR addresses L1 test case failures for the playerisobmff module by adding comprehensive unit test infrastructure and fixing validation issues in production code.

Changes:

• Added 20+ new test suites covering DRM, subtitles, plugins, player components, and externals
• Enhanced input validation in subtitle parsers (WebVtt, TextStyleAttributes)
• Improved thread safety in HlsDrmSessionManager
• Added null pointer checks in base64 encoding/decoding and DRM utilities
• Refactored fake implementations for better test support

Reviewed changes

Copilot reviewed 74 out of 143 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/utests/tests/*/CMakeLists.txt	Added CMake configurations for new test suites
test/utests/tests//.cpp	Added test runner and test case files
subtec/subtecparser/*.cpp	Added input validation for width/height parameters
drm/HlsDrmSessionManager.cpp	Improved thread safety by copying callback locally
baseConversion/_base64.cpp	Added null checks and empty input handling
drm/DrmUtils.cpp	Added null pointer check for psshData
PlayerUtils.cpp	Used std::move for efficiency, exposed internal function for testing
InterfacePlayerRDK.cpp	Added null checks and improved error logging
GstHandlerControl.cpp	Added validation for negative delay values
test/utests/fakes/*.cpp	Updated fake implementations to support new tests

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[Copilot]

The input validation should use braces on separate lines for consistency with the rest of the codebase. The check validates that width and height are positive, which is good defensive programming.

Suggested change

	if(width <= 0 || height <= 0) {
	throw std::invalid_argument("Width and height must be greater than zero");
	if (width <= 0 || height <= 0)
	{
	throw std::invalid_argument("Width and height must be greater than zero");