[RFC PATCH v2 00/16] apps: lc-compliance: Multi-stream tests

[Barnabás Pőcze]

This changeset adds multi-stream tests based on the last two commits of
https://patchwork.libcamera.org/project/libcamera/list/?series=4234

Similarly, only two commits here deal with multi-stream tests directly:
  * Support multiple streams in helpers
  * Add multi-stream tests

Most other changes are non-functional changes.

One notable difference compared to the last patch of the aforementioned
series is that no new test is created, the current tests are kept
and are simply run with multiple streams.

Another notable change is that the `CaptureBalanced` and `CaptureUnbalanced`
are merged into the `Capture` base class.

Changes in v2:
 * add a couple smalle `EventLoop` changes
 * remove https://patchwork.libcamera.org/patch/22442/
 * merge `CaptureBalanced` and `CaptureUnbalanced`
 * run request completion handler in "main" thread

Barnabás Pőcze (16):
  apps: common: event_loop: Take callbacks by rvalue ref
  apps: common: event_loop: Disable copy/move
  apps: common: event_loop: Use `std::deque` instead of `std::list`
  apps: common: event_loop: Use single event source for deferred calls
  apps: lc-compliance: Initialize `CameraManager` pointer in
    `Environment`
  apps: lc-compliance: Put tests into anonymous namespace
  apps: lc-compliance: Optimize `std::shared_ptr` usage
  apps: lc-compliance: Remove redundant getter call
  apps: lc-compliance: Don't allocate `FrameBufferAllocator` dynamically
  apps: lc-compliance: Use `std::vector` for argument array
  apps: lc-compliance: Use array instead of `std::vector`
  apps: lc-compliance: Add message to `GTEST_SKIP()`
  apps: lc-compliance: Merge `CaptureBalanced` and `CaptureUnbalanced`
  apps: lc-compliance: Support multiple streams in helpers
  apps: lc-compliance: Add multi-stream tests
  apps: lc-compliance: Run request completion handler in "main" thread

 src/apps/common/event_loop.cpp                |  64 +++---
 src/apps/common/event_loop.h                  |  22 +-
 src/apps/lc-compliance/environment.h          |   2 +-
 src/apps/lc-compliance/helpers/capture.cpp    | 217 +++++++++---------
 src/apps/lc-compliance/helpers/capture.h      |  54 ++---
 src/apps/lc-compliance/main.cpp               |  42 +---
 src/apps/lc-compliance/tests/capture_test.cpp | 100 ++++----
 7 files changed, 243 insertions(+), 258 deletions(-)

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2.48.0