/usr/bin/jack_control is in jackd2 1.9.10+20140719git3eb0ae6a~dfsg-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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name_base = 'org.jackaudio'
control_interface_name = name_base + '.JackControl'
configure_interface_name = name_base + '.Configure'
service_name = name_base + '.service'
import sys
import os
from traceback import print_exc
import dbus
def bool_convert(str_value):
if str_value.lower() == "false":
return False
if str_value.lower() == "off":
return False
if str_value.lower() == "no":
return False
if str_value == "0":
return False
if str_value.lower() == "(null)":
return False
return bool(str_value)
def dbus_type_to_python_type(dbus_value):
if type(dbus_value) == dbus.Boolean:
return bool(dbus_value)
if type(dbus_value) == dbus.Int32 or type(dbus_value) == dbus.UInt32:
return int(dbus_value)
return dbus_value
def python_type_to_jackdbus_type(value, type_char):
type_char = str(type_char)
if type_char == "b":
return bool_convert(value);
elif type_char == "y":
return dbus.Byte(value);
elif type_char == "i":
return dbus.Int32(value)
elif type_char == "u":
return dbus.UInt32(value)
return value
def dbus_type_to_type_string(dbus_value):
if type(dbus_value) == dbus.Boolean:
return "bool"
if type(dbus_value) == dbus.Int32:
return "sint"
if type(dbus_value) == dbus.UInt32:
return "uint"
if type(dbus_value) == dbus.Byte:
return "char"
if type(dbus_value) == dbus.String:
return "str"
return None # throw exception here?
def dbus_typesig_to_type_string(type_char):
type_char = str(type_char)
if type_char == 'i':
return "sint"
if type_char == 'u':
return "uint"
if type_char == 'y':
return "char"
if type_char == 's':
return "str"
if type_char == 'b':
return "bool"
print 'shit'
return None # throw exception here?
def get_parameters(iface, path):
params = iface.GetParametersInfo(path)
#print params
for param in params:
typestr = dbus_typesig_to_type_string(param[0])
name = param[1]
#print name
descr = param[2]
#print descr
isset, default, value = iface.GetParameterValue(path + [name])
#print typestr
if bool(isset):
isset = "set"
else:
isset = "notset"
value = dbus_type_to_python_type(value)
default = dbus_type_to_python_type(default)
print "%20s: %s (%s:%s:%s:%s)" %(name, descr, typestr, isset, default, value)
def print_help():
print "Usage: %s [command] [command] ..." % os.path.basename(sys.argv[0])
print "Commands:"
print " exit - exit jack dbus service (stops jack server if currently running)"
print " help - print this help text"
print " status - check whether jack server is started, return value is 0 if running and 1 otherwise"
print " start - start jack server if not currently started"
print " stop - stop jack server if currently started"
print " sm - switch master to currently selected driver"
print " dl - get list of available drivers"
print " dg - get currently selected driver"
print " ds <driver> - select driver"
print " dp - get parameters of currently selected driver"
print " dpd <param> - get long description for driver parameter"
print " dps <param> <value> - set driver parameter"
print " dpr <param> - reset driver parameter to its default value"
print " asd <driver> - add slave driver"
print " rsd <driver> - remove slave driver"
print " il - get list of available internals"
print " ip <name> - get parameters of given internal"
print " ipd <name> <param> - get long description for internal parameter"
print " ips <name> <param> <value> - set internal parameter"
print " ipr <name> <param> - reset internal parameter to its default value"
print " iload <name> - load internal"
print " iunload <name> - unload internal"
print " ep - get engine parameters"
print " epd <param> - get long description for engine parameter"
print " eps <param> <value> - set engine parameter"
print " epr <param> - reset engine parameter to its default value"
def maybe_print_param_constraint(iface, param):
is_range, is_strict, is_fake, values = iface.GetParameterConstraint(param)
if is_range:
print
print("allowed range: %s to %s (inclusive)" % (values[0][0], values[1][0]))
elif len(values):
print
if is_strict:
print("allowed values:")
else:
print("suggested values:")
max_len = 0
for value in values:
if len(str(value[0])) > max_len:
max_len = len(str(value[0]))
for value in values:
print("%*s'%s' - %s" % (1 + max_len - len(str(value[0])), "", str(value[0]), str(value[1])))
def main():
if len(sys.argv) == 1 or sys.argv[1] in ["-h", "--help", "help"]:
print_help()
sys.exit(0)
bus = dbus.SessionBus()
controller = bus.get_object(service_name, "/org/jackaudio/Controller")
control_iface = dbus.Interface(controller, control_interface_name)
configure_iface = dbus.Interface(controller, configure_interface_name)
# check arguments
index = 1
while index < len(sys.argv):
arg = sys.argv[index]
index += 1
try:
if arg == "exit":
print "--- exit"
control_iface.Exit()
elif arg == "status":
print "--- status"
if control_iface.IsStarted():
print "started"
sys.exit(0)
else:
print "stopped"
sys.exit(1)
elif arg == 'start':
print "--- start"
control_iface.StartServer()
elif arg == 'stop':
print "--- stop"
control_iface.StopServer()
elif arg == 'sm':
print "--- switch master driver"
control_iface.SwitchMaster()
elif arg == 'ism':
if control_iface.IsManuallyActivated():
print "Manually activated"
else:
print "Automatically activated"
elif arg == 'dl':
print "--- drivers list"
is_range, is_strict, is_fake_values, values = configure_iface.GetParameterConstraint(['engine', 'driver'])
for value in values:
print value[1]
elif arg == 'dg':
print "--- get selected driver"
isset, default, value = configure_iface.GetParameterValue(['engine', 'driver'])
print value
elif arg == 'ds':
if index >= len(sys.argv):
print "driver select command requires driver name argument"
sys.exit()
arg = sys.argv[index]
index += 1
print "--- driver select \"%s\"" % arg
configure_iface.SetParameterValue(['engine', 'driver'], dbus.String(arg))
elif arg == 'dp':
print "--- get driver parameters (type:isset:default:value)"
get_parameters(configure_iface, ['driver'])
elif arg == 'dpd':
if index >= len(sys.argv):
print "get driver parameter long description command requires parameter name argument"
sys.exit()
param = sys.argv[index]
index += 1
print "--- get driver parameter description (%s)" % param
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['driver', param])
print long_descr
maybe_print_param_constraint(configure_iface, ['driver', param])
elif arg == 'dps':
if index + 1 >= len(sys.argv):
print "driver parameter set command requires parameter name and value arguments"
sys.exit()
param = sys.argv[index]
index += 1
value = sys.argv[index]
index += 1
print "--- driver param set \"%s\" -> \"%s\"" % (param, value)
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['driver', param])
configure_iface.SetParameterValue(['driver', param], python_type_to_jackdbus_type(value, type_char))
elif arg == 'dpr':
if index >= len(sys.argv):
print "driver parameter reset command requires parameter name argument"
sys.exit()
param = sys.argv[index]
index += 1
print "--- driver param reset \"%s\"" % param
configure_iface.ResetParameterValue(['driver', param])
elif arg == 'ep':
print "--- get engine parameters (type:isset:default:value)"
get_parameters(configure_iface, ['engine'])
elif arg == 'epd':
if index >= len(sys.argv):
print "get engine parameter long description command requires parameter name argument"
sys.exit()
param_name = sys.argv[index]
index += 1
print "--- get engine parameter description (%s)" % param_name
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['engine', param_name])
print long_descr
maybe_print_param_constraint(configure_iface, ['engine', param_name])
elif arg == 'eps':
if index + 1 >= len(sys.argv):
print "engine parameter set command requires parameter name and value arguments"
sys.exit()
param = sys.argv[index]
index += 1
value = sys.argv[index]
index += 1
print "--- engine param set \"%s\" -> \"%s\"" % (param, value)
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['engine', param])
configure_iface.SetParameterValue(['engine', param], python_type_to_jackdbus_type(value, type_char))
elif arg == 'epr':
if index >= len(sys.argv):
print "engine parameter reset command requires parameter name"
sys.exit()
param = sys.argv[index]
index += 1
print "--- engine param reset \"%s\"" % param
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['engine', param])
configure_iface.ResetParameterValue(['engine', param])
elif arg == 'il':
print "--- internals list"
is_leaf, internals = configure_iface.ReadContainer(['internals'])
for internal in internals:
print internal
elif arg == 'ip':
print "--- get internal parameters (type:isset:default:value)"
if index >= len(sys.argv):
print "internal parameters command requires internal name argument"
sys.exit()
internal_name = sys.argv[index]
index += 1
get_parameters(configure_iface, ['internals', internal_name])
elif arg == 'ipd':
if index + 1 >= len(sys.argv):
print "get internal parameter long description command requires internal and parameter name arguments"
sys.exit()
name = sys.argv[index]
index += 1
param = sys.argv[index]
index += 1
print "--- get internal parameter description (%s)" % param
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['internals', name, param])
print long_descr
elif arg == 'ips':
if index + 2 >= len(sys.argv):
print "internal parameter set command requires internal, parameter name and value arguments"
sys.exit()
internal_name = sys.argv[index]
index += 1
param = sys.argv[index]
index += 1
value = sys.argv[index]
index += 1
print "--- internal param set \"%s\" -> \"%s\"" % (param, value)
type_char, name, short_descr, long_descr = configure_iface.GetParameterInfo(['internals', internal_name, param])
configure_iface.SetParameterValue(['internals', internal_name, param], python_type_to_jackdbus_type(value, type_char))
elif arg == 'ipr':
if index + 1 >= len(sys.argv):
print "reset internal parameter command requires internal and parameter name arguments"
sys.exit()
internal_name = sys.argv[index]
index += 1
param = sys.argv[index]
index += 1
print "--- internal param reset \"%s\"" % param
configure_iface.ResetParameterValue(['internals', internal_name, param])
elif arg == 'iload':
print "--- load internal"
if index >= len(sys.argv):
print "load internal command requires internal name argument"
sys.exit()
name = sys.argv[index]
index += 1
result = control_iface.LoadInternal(name)
elif arg == 'iunload':
print "--- unload internal"
if index >= len(sys.argv):
print "unload internal command requires internal name argument"
sys.exit()
name = sys.argv[index]
index += 1
result = control_iface.UnloadInternal(name)
elif arg == 'asd':
print "--- add slave driver"
if index >= len(sys.argv):
print "add slave driver command requires driver name argument"
sys.exit()
name = sys.argv[index]
index += 1
result = control_iface.AddSlaveDriver(name)
elif arg == 'rsd':
print "--- remove slave driver"
if index >= len(sys.argv):
print "remove slave driver command requires driver name argument"
sys.exit()
name = sys.argv[index]
index += 1
result = control_iface.RemoveSlaveDriver(name)
else:
print "Unknown command '%s'" % arg
except dbus.DBusException, e:
print "DBus exception: %s" % str(e)
if __name__ == '__main__':
main()
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