2caa3e0230
Checking for GL caps features in gl_start() was done too late in case the parent class fails to setup a working GL context. The element now determines if GL support should be enabled during the decide-allocation query handling. Additionally, when no GL context was found, we need to handle the element cleanup because in that situation glbasesrc won't call gl_stop. Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1376 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1532>