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EMBEDDING INTO OTHER PROGRAMS (LIBMPV)
======================================
mpv can be embedded into other programs as video/audio playback backend. The
recommended way to do so is using libmpv. See ``libmpv/client.h`` in the mpv
source code repository. This provides a C API. Bindings for other languages
might be available (see wiki).
Since libmpv merely allows access to underlying mechanisms that can control
mpv, further documentation is spread over a few places:
- https://github.com/mpv-player/mpv/blob/master/libmpv/client.h
- http://mpv.io/manual/master/#options
- http://mpv.io/manual/master/#list-of-input-commands
- http://mpv.io/manual/master/#properties
- https://github.com/mpv-player/mpv-examples/tree/master/libmpv
C PLUGINS
=========
You can write C plugins for mpv. These use the libmpv API, although they do not
use the libmpv library itself.
Currently, they must be explicitlx enabled at build time with
``--enable-cplugins``. They are available on Linux/BSD platforms only.
C plugins location
------------------
C plugins are put into the mpv scripts directory in its config directory
(see the `FILES`_ section for details). They must have a ``.so`` file extension.
They can also be explicitly loaded with the ``--script`` option.
API
---
A C plugin must export the following function::
int mpv_open_cplugin(mpv_handle *handle)
The plugin function will be called on loading time. This function does not
return as long as your plugin is loaded (it runs in its own thread). The
``handle`` will be deallocated as soon as the plugin function returns.
The return value is interpreted as error status. A value of ``0`` is
interpreted as success, while any other value signals an error. In the latter
case, the player prints an uninformative error message that loading failed.
Within the plugin function, you can call libmpv API functions. The ``handle``
is created by ``mpv_create_client()`` (or actually an internal equivalent),
and belongs to you. You can call ``mpv_wait_event()`` to wait for things
happening, and so on.
Note that the player might block until your plugin calls ``mpv_wait_event()``
for the first time. This gives you a chance to install initial hooks etc.
before playback begins.
The details are quite similar to Lua scripts.
Linkage to libmpv
-----------------
The current implementation requires that your plugins are **not** linked against
libmpv. What your plugins uses are not symbols from a libmpv binary, but
symbols from the mpv host binary.
Examples
--------
See:
- https://github.com/mpv-player/mpv-examples/tree/master/cplugins
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