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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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113 lines
3.4 KiB
Python
113 lines
3.4 KiB
Python
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#!/usr/bin/env python
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USAGE = """
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Usage:
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python ladspa-dbus.py <sinkname> [values]
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The "sinkname" parameter is the name of the ladspa sink. The "values"
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parameter is a comma-separated list of ladspa sink parameter values. A
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value in the list can be either string "default" or a float.
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Example usage:
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python ladspa-dbus.py ladspa_1 10.0,default,4.0,0.6,default
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This command will configure sink "ladspa_1" by setting the first value
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to 10.0, the second to the default value (specified in the ladspa
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filter), the third to 4.0 and so on.
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"""
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import dbus
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import os
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import sys
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def get_ladspa_property_interface(sinkname):
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# do some D-Bus stuff to get to the real ladspa property object
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session = dbus.SessionBus()
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# get the private D-Bus socket address from PulseAudio properties
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session_property_iface = dbus.Interface(session.get_object("org.PulseAudio1", "/org/pulseaudio/server_lookup1"), "org.freedesktop.DBus.Properties")
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socket = session_property_iface.Get("org.PulseAudio.ServerLookup1", "Address")
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# connect to the private PulseAudio D-Bus socket
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connection = dbus.connection.Connection(socket)
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# core object for listing the sinks
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core = connection.get_object(object_path="/org/pulseaudio/core1")
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# object path to the ladspa sink
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ladspa_sink_path = core.GetSinkByName(sinkname)
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# property interface proxy for the sink
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ladspa_sink_property_iface = dbus.Interface(connection.get_object(object_path=ladspa_sink_path), "org.freedesktop.DBus.Properties")
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return ladspa_sink_property_iface
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def parse_arguments(args):
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sinkname = None
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arguments = []
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defaults = []
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if len(args) >= 2:
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sinkname = args[1]
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if len(args) == 3:
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tokens = args[2].split(",")
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for token in tokens:
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if token == "default":
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arguments.append(0.0)
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defaults.append(True)
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else:
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arguments.append(float(token))
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defaults.append(False)
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"""
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print("Input arguments:")
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print(" sink: " + sink)
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print(" arguments: " + str(arguments))
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print(" defaults: " + str(defaults))
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"""
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return sinkname, arguments, defaults
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def print_arguments(arguments, defaults):
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for i in range(len(arguments)):
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default = ""
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if defaults[i]:
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default = "default"
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print(str(i) + " : " + str(arguments[i]) + " \t" + default)
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sinkname, arguments, defaults = parse_arguments(sys.argv)
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if sinkname == None:
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print USAGE
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sys.exit(1)
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# get the D-Bus property interface of the sink
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ladspa = get_ladspa_property_interface(sinkname)
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# read the current sink arguments from PulseAudio
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oldarguments, olddefaults = ladspa.Get("org.PulseAudio.Ext.Ladspa1", "AlgorithmParameters")
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print("Current LADSPA parameters for sink " + sinkname + ":")
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print_arguments(oldarguments, olddefaults)
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if len(arguments) != 0:
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# set new arguments if they were provided on the command line
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# Set the arguments ...
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ladspa.Set("org.PulseAudio.Ext.Ladspa1", "AlgorithmParameters", (dbus.Array(arguments), dbus.Array(defaults)))
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# ... and read them back.
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newarguments, newdefaults = ladspa.Get("org.PulseAudio.Ext.Ladspa1", "AlgorithmParameters")
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print("New LADSPA parameters for sink " + sinkname + ":")
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print_arguments(newarguments, newdefaults)
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# test the GetAll functionality
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# print(str(ladspa.GetAll("org.PulseAudio.Ext.Ladspa1")))
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