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Python ctypes bindings for pulseaudio (libpulse).

Project description

Python 2.X ctypes bindings for PulseAudio (libpulse), forked from pulsemixer project (which had this code bundled) to re-use this awesome stuff in other projects.


Usage

Simple example:

from pulsectl import Pulse

with Pulse('volume-increaser') as pulse:
  for sink in pulse.sink_list():
    pulse.volume_change_all_chans(sink, 10)

Listening for server state change events:

from pulsectl import Pulse, PulseLoopStop

      with Pulse('event-printer') as pulse:
              # print 'Event types:', ', '.join(pulse.event_types)
              # print 'Event facilities:', ', '.join(pulse.event_facilities)
              # print 'Event masks:', ', '.join(pulse.event_masks)

              def print_events(ev):
                      print 'Pulse event:', ev
                      ### Raise PulseLoopStop for event_listen() to return before timeout (if any)
                      # raise PulseLoopStop

              pulse.event_mask_set('all')
              pulse.event_callback_set(print_events)
              pulse.event_listen(timeout=10)

Misc other tinkering:

>>> from pulsectl import Pulse
>>> pulse = Pulse('my-client-name')

>>> pulse.sink_list()
[<PulseSinkInfo at 7f85cfd053d0 - desc='Built-in Audio', index=0L, mute=0, name='alsa-speakers', channels=2, volumes='44.0%, 44.0%'>]

>>> pulse.sink_input_list()
[<PulseSinkInputInfo at 7fa06562d3d0 - index=181L, mute=0, name='mpv Media Player', channels=2, volumes='25.0%, 25.0%'>]

>>> pulse.source_list()
[<PulseSourceInfo at 7fcb0615d8d0 - desc='Monitor of Built-in Audio', index=0L, mute=0, name='alsa-speakers.monitor', channels=2, volumes='100.0%, 100.0%'>,
 <PulseSourceInfo at 7fcb0615da10 - desc='Built-in Audio', index=1L, mute=0, name='alsa-mic', channels=2, volumes='100.0%, 100.0%'>]

>>> sink = pulse.sink_list()[0]
>>> pulse.volume_change_all_chans(sink, -10)
>>> pulse.volume_set_all_chans(sink, 50)

>>> help(pulse)
...

Current code logic is that all methods are invoked through the Pulse instance, and everything returned from these are “Pulse-Something-Info” objects - thin wrappers around C structs that describe the thing, without any methods attached.

Module is relatively new and these high-level interfaces might change in the future.

Installation

It’s a regular package for Python 2.7 (not 3.X).

Using pip is the best way:

% pip install pulsectl

If you don’t have it, use:

% easy_install pip
% pip install pulsectl

Alternatively (see also pip2014.com and pip install guide):

% curl https://raw.github.com/pypa/pip/master/contrib/get-pip.py | python2
% pip install pulsectl

Or, if you absolutely must:

% easy_install pulsectl

But, you really shouldn’t do that.

Current-git version can be installed like this:

% pip install 'git+https://github.com/mk-fg/python-pulse-control.git#egg=pulsectl'

Note that to install stuff in system-wide PATH and site-packages, elevated privileges are often required. Use “install –user”, ~/.pydistutils.cfg or virtualenv to do unprivileged installs into custom paths.

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