Run tests with FFMpeg backend on macOS without depending on CMake variable

The mechanism employed where a CI test configuration would add
'NON_QTBASE_CMAKE_ARGS=-DFFMPEG_DIR={{.Env.FFMPEG_DIR}}' to its
environment variables to trigger QT_MEDIA_BACKEND=ffmpeg, was
needlessly indirect and based on conditions that didn't make
sense.

A better alternative would be for the CI configurations to declare
QT_MEDIA_BACKEND=ffmpeg directly in each configuration, but since
we know that we want to run the tests with FFMpeg on all macOS
configurations we can apply the environment variable directly,
instead of modifying every single CI configuration.

If multiple backend tests are needed in the future this can be
done wither with QT_MEDIA_BACKEND set to multiple values, or
by adding multimeida-specific CI configurations that override
QT_MEDIA_BACKEND, but should not affect any of the generic
macOS test configurations.

Change-Id: I27e09ffb274d18b600af213e0cf79deadf7bc2d1
Reviewed-by: Lars Knoll <lars@knoll.priv.no>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>

0 files changed, 0 insertions, 0 deletions