The libpipwire .so file is called libpipewire-@PIPEWIRE_API_VERSION@.so,
not libpipewire.so, so tell build systems to link against the correct
library.
It was sometimes assumed to be 0.1, sometimes 1.0, and sometimes not to
be used at all. This commit makes things consistent and so that it is
possible to link externally.
A module is a shared library existing in, or a subdirectory of, the
module directory. The directory is by default
${libdir}/pinos-$(MAJORMINOR)/modules, but can be specified with
--with-module-dir=PATH when running configure. It is also possible to
override the module directory runtime with the environment variable
PINOS_MODULE_DIR, which is a list of directories separated with ":".
It's possible that the last ref to a source-output is removed with
the remove signal, in that case, remove the object from the client
watched objects to avoid freeing it twice.
Use installed gstreamer and fix library name
