6e3da00874
At least I believe libmpdclient is reading env. var. as second: https://github.com/MusicPlayerDaemon/libmpdclient/blob/master/src/settings.c#L142 ncmpc manual also mentions MPD_TIMEOUT being is second.
65 lines
2.1 KiB
ReStructuredText
65 lines
2.1 KiB
ReStructuredText
Client Developer's Manual
|
|
#########################
|
|
|
|
Introduction
|
|
************
|
|
|
|
MPD is a music player without a user interface. The user interface
|
|
will be provided by independent clients, which connect to MPD over
|
|
socket connections (TCP or local sockets).
|
|
|
|
This chapter describes how to develop a client.
|
|
|
|
Before you develop a new client, consider joining an existing client
|
|
project. There are many clients, but few are mature; we need fewer,
|
|
but better clients.
|
|
|
|
Client Libraries
|
|
****************
|
|
|
|
There are many libraries which help with connecting to MPD. If you
|
|
develop a MPD client, use a library instead of reinventing the wheel.
|
|
The MPD website has a list of libraries: https://www.musicpd.org/libs/
|
|
|
|
|
|
Connecting to MPD
|
|
*****************
|
|
|
|
Do not hard-code your client to connect to ``localhost:6600``.
|
|
Instead, use the defaults of the client library. For example, with
|
|
:program:`libmpdclient`, don't do::
|
|
|
|
c = mpd_connection_new("localhost", 6600, 30000);
|
|
|
|
Instead, do::
|
|
|
|
c = mpd_connection_new(NULL, 0, 0);
|
|
|
|
This way, the library can choose the best defaults, maybe derived from
|
|
environment variables, so all MPD clients use the same settings.
|
|
|
|
If you need to reimplement those defaults (or if you are developing a
|
|
client library), this is a good set of addresses to attempt to connect
|
|
to:
|
|
|
|
- if the environment variable :envvar:`MPD_HOST` is set:
|
|
``$MPD_HOST:$MPD_PORT`` (:envvar:`MPD_PORT` defaulting to 6600)
|
|
- if the environment variable :envvar:`XDG_RUNTIME_DIR` is set:
|
|
``$XDG_RUNTIME_DIR/mpd/socket``
|
|
- :file:`/run/mpd/socket`
|
|
- ``localhost:$MPD_PORT`` (:envvar:`MPD_PORT` defaulting to 6600)
|
|
|
|
Environment Variables
|
|
*********************
|
|
|
|
The following environment variables should be obeyed by all clients
|
|
(preferably by the client library):
|
|
|
|
- :envvar:`MPD_HOST`: the host (or local socket path) to connect to;
|
|
on Linux, this may start with a ``@`` to connect to an abstract
|
|
socket.
|
|
- :envvar:`MPD_PORT`: the port number; defaults to 6600.
|
|
- :envvar:`MPD_TIMEOUT`: timeout for connecting to MPD and for waiting
|
|
for MPD's response in seconds. A good default is 30 seconds.
|
|
|