gstreamer: Add meson devenv support

This change to the build system will prepend the plugin build directory
to GST_PLUGIN_PATH environment. This makes the built plugin visible to
GStreamer inside meson devenv enabling uninstalled testing. In order to
avoid polluting the user registry, the GST_REGISTRY environment is also
set.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Nicolas Dufresne 2024-01-19 15:08:47 -05:00 committed by Laurent Pinchart
parent 81791d2cac
commit ebc396fc7a
2 changed files with 16 additions and 3 deletions

View file

@ -120,12 +120,13 @@ setting the ``LIBCAMERA_LOG_LEVELS`` environment variable:
Using GStreamer plugin
~~~~~~~~~~~~~~~~~~~~~~
To use GStreamer plugin from source tree, set the following environment so that
GStreamer can find it. This isn't necessary when libcamera is installed.
To use the GStreamer plugin from the source tree, use the meson ``devenv``
command. This will create a new shell instance with the ``GST_PLUGIN_PATH``
environment set accordingly.
.. code::
export GST_PLUGIN_PATH=$(pwd)/build/src/gstreamer
meson devenv -C build
The debugging tool ``gst-launch-1.0`` can be used to construct a pipeline and
test it. The following pipeline will stream from the camera named "Camera 1"