GStreamer imsdk camera test suite

[nitinn22]

This test suite provides comprehensive validation of camera functionality using GStreamer with Qualcomm's qtiqmmfsrc plugin (downstream) or libcamerasrc (upstream). Tests run in a specific sequence to validate different camera capabilities progressively.

The test suite automatically detects which camera source plugin is available:

1. qtiqmmfsrc (Qualcomm CAMX downstream): Runs 10 tests

   • Fakesink (2) + Preview (2) + Encode (6)
   • Priority: Used by default when both plugins are detected
   • Supports NV12 and UBWC formats

2. libcamerasrc (upstream): Runs 7 tests

   • Fakesink (1) + Preview (3) + Encode (3)
   • Used when qtiqmmfsrc is not available or explicitly requested
   • Supports NV12 format only

Lava job for reference with these changes, Refer https://lava.infra.foundries.io/scheduler/job/182439#L2523

[smuppand]

This PR would be much easier to review and maintain if it is reduced to the minimum supported feature set.

Right now the suite is over-expanded for an initial submission: the runner is very large, the README is very long, and the shared library change includes helper additions that do not appear to be required by the suite’s current execution path.

Please tighten this PR. Suggested cleanup:

1. Remove interfaces that are not actually implemented end-to-end yet

   • e.g. --test-name / CAMERA_TEST_NAME if single-test filtering is not wired up
   • remove snapshot-related helper additions if snapshot tests are not actually executed

2. Keep only shared lib_gstreamer.sh helpers that are used by this suite today

3. Reduce the README to the essentials

   • overview
   • prerequisites
   • actual supported test matrix
   • parameters
   • basic troubleshooting

4. Split into 2 commits

   • shared helper additions
   • Camera_Tests suite files

5. Fix the YAML wrapper to the repo-standard form while respinning

If needed, it would also be reasonable to reduce this to a smaller MVP first (for example only the verified backend/test paths), and then add more coverage in follow-up PRs.

[nitinn22]

• Removed pipeline related functions from the lib_gstreamer.sh
• Fixed a timeout bug in GStreamer pipeline execution
• Enhanced error detection with SIGSEGV/crash detection, currently camera preview shows this error on recent builds.
• Improved test output with file size reporting for encode tests

[smuppand]

Please squash the commits into

At most, 2 logical commits would make sense:

1. shared Runner/utils/[lib_gstreamer.sh](http://lib_gstreamer.sh/) helper additions
2. Camera_Tests suite files

[nitinn22]

quashed commits as suggested.
Final history now contains two logical commits:

• shared Runner/utils/lib_gstreamer.sh helper changes
• Camera_Tests suite files and all follow‑up fixes

Please review. Thanks!

[smuppand]

The PR is much closer now, and I no longer see the previous major structural blockers. Only minor comment fixes and the main shell lint issues remain.

[smuppand]

This line in the current YAML is invalid YAML. Because YAML reads the first quoted part as one complete string.

definition: lava
case: job
result: fail
error_msg: Unable to open test definition 'Runner/suites/Multimedia/GSTreamer/Camera/Camera_Tests/Camera_Tests.yaml': while parsing a block collection in "/var/lib/lava/dispatcher/tmp/182770/lava-overlay-en67i_an/home/lava-182770/0/tests/0_Weston_Runtime_Preflight/Runner/suites/Multimedia/GSTreamer/Camera/Camera_Tests/Camera_Tests.yaml", line 28, column 5 did not find expected '-' indicator in "/var/lib/lava/dispatcher/tmp/182770/lava-overlay-en67i_an/home/lava-182770/0/tests/0_Weston_Runtime_Preflight/Runner/suites/Multimedia/GSTreamer/Camera/Camera_Tests/Camera_Tests.yaml", line 32, column 49
error_type: Job