summaryrefslogtreecommitdiffstats
path: root/src/utils/qpaeq.py
blob: dca0701d0940aa11d8d2f13359df5d9d7fefb33c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
#!/usr/bin/env python
#    qpaeq is a equalizer interface for pulseaudio's equalizer sinks
#    Copyright (C) 2009  Jason Newton <nevion@gmail.com
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.


import os,math,sys
import PyQt4,sip
from PyQt4 import QtGui,QtCore
from functools import partial

import dbus.mainloop.qt
import dbus

import signal
signal.signal(signal.SIGINT, signal.SIG_DFL)
SYNC_TIMEOUT = 4*1000

CORE_PATH = "/org/pulseaudio/core1"
CORE_IFACE = "org.PulseAudio.Core1"
def connect():
    if 'PULSE_DBUS_SERVER' in os.environ:
        address = os.environ['PULSE_DBUS_SERVER']
    else:
        bus = dbus.SessionBus() # Should be UserBus, but D-Bus doesn't implement that yet.
        server_lookup = bus.get_object('org.PulseAudio1', '/org/pulseaudio/server_lookup1')
        address = server_lookup.Get('org.PulseAudio.ServerLookup1', 'Address', dbus_interface='org.freedesktop.DBus.Properties')
    return dbus.connection.Connection(address)


#TODO: signals: sink Filter changed, sink reconfigured (window size) (sink iface)
#TODO: manager signals: new sink, removed sink, new profile, removed profile
#TODO: add support for changing of window_size 1000-fft_size (adv option)
#TODO: reconnect support loop 1 second trying to reconnect
#TODO: just resample the filters for profiles when loading to different sizes
#TODO: add preamp
prop_iface='org.freedesktop.DBus.Properties'
eq_iface='org.PulseAudio.Ext.Equalizing1.Equalizer'
device_iface='org.PulseAudio.Core1.Device'
class QPaeq(QtGui.QWidget):
    manager_path='/org/pulseaudio/equalizing1'
    manager_iface='org.PulseAudio.Ext.Equalizing1.Manager'
    core_iface='org.PulseAudio.Core1'
    core_path='/org/pulseaudio/core1'
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.setWindowTitle('qpaeq')
        self.slider_widget=None
        self.sink_name=None
        self.filter_state=None

        self.create_layout()

        self.set_connection()
        self.connect_to_sink(self.sinks[0])
        self.set_callbacks()
        self.setMinimumSize(self.sizeHint())

    def create_layout(self):
        self.main_layout=QtGui.QVBoxLayout()
        self.setLayout(self.main_layout)
        toprow_layout=QtGui.QHBoxLayout()
        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        #sizePolicy.setHeightForWidth(self.profile_box.sizePolicy().hasHeightForWidth())

        toprow_layout.addWidget(QtGui.QLabel('Sink'))
        self.sink_box = QtGui.QComboBox()
        self.sink_box.setSizePolicy(sizePolicy)
        self.sink_box.setDuplicatesEnabled(False)
        self.sink_box.setInsertPolicy(QtGui.QComboBox.InsertAlphabetically)
        #self.sink_box.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
        toprow_layout.addWidget(self.sink_box)

        toprow_layout.addWidget(QtGui.QLabel('Channel'))
        self.channel_box = QtGui.QComboBox()
        self.channel_box.setSizePolicy(sizePolicy)
        toprow_layout.addWidget(self.channel_box)

        toprow_layout.addWidget(QtGui.QLabel('Preset'))
        self.profile_box = QtGui.QComboBox()
        self.profile_box.setSizePolicy(sizePolicy)
        self.profile_box.setInsertPolicy(QtGui.QComboBox.InsertAlphabetically)
        #self.profile_box.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
        toprow_layout.addWidget(self.profile_box)

        large_icon_size=self.style().pixelMetric(QtGui.QStyle.PM_LargeIconSize)
        large_icon_size=QtCore.QSize(large_icon_size,large_icon_size)
        save_profile=QtGui.QToolButton()
        save_profile.setIcon(self.style().standardIcon(QtGui.QStyle.SP_DriveFDIcon))
        save_profile.setIconSize(large_icon_size)
        save_profile.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
        save_profile.clicked.connect(self.save_profile)
        remove_profile=QtGui.QToolButton()
        remove_profile.setIcon(self.style().standardIcon(QtGui.QStyle.SP_TrashIcon))
        remove_profile.setIconSize(large_icon_size)
        remove_profile.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
        remove_profile.clicked.connect(self.remove_profile)
        toprow_layout.addWidget(save_profile)
        toprow_layout.addWidget(remove_profile)

        reset_button = QtGui.QPushButton('Reset')
        reset_button.clicked.connect(self.reset)
        toprow_layout.addStretch()
        toprow_layout.addWidget(reset_button)
        self.layout().addLayout(toprow_layout)

        self.profile_box.activated.connect(self.load_profile)
        self.channel_box.activated.connect(self.select_channel)
    def connect_to_sink(self,name):
        #TODO: clear slots for profile buttons

        #flush any pending saves for other sinks
        if self.filter_state is not None:
            self.filter_state.flush_state()
        sink=self.connection.get_object(object_path=name)
        self.sink_props=dbus.Interface(sink,dbus_interface=prop_iface)
        self.sink=dbus.Interface(sink,dbus_interface=eq_iface)
        self.filter_state=FilterState(sink)
        #sample_rate,filter_rate,channels,channel)

        self.channel_box.clear()
        self.channel_box.addItem('All',self.filter_state.channels)
        for i in xrange(self.filter_state.channels):
            self.channel_box.addItem('%d' %(i+1,),i)
        self.setMinimumSize(self.sizeHint())

        self.set_slider_widget(SliderArray(self.filter_state))

        self.sink_name=name
        #set the signal listener for this sink
        core=self._get_core()
        #temporary hack until signal filtering works properly
        core.ListenForSignal('',[dbus.ObjectPath(self.sink_name),dbus.ObjectPath(self.manager_path)])
        #for x in ['FilterChanged']:
        #    core.ListenForSignal("%s.%s" %(self.eq_iface,x),[dbus.ObjectPath(self.sink_name)])
        #core.ListenForSignal(self.eq_iface,[dbus.ObjectPath(self.sink_name)])
        self.sink.connect_to_signal('FilterChanged',self.read_filter)

    def set_slider_widget(self,widget):
        layout=self.layout()
        if self.slider_widget is not None:
            i=layout.indexOf(self.slider_widget)
            layout.removeWidget(self.slider_widget)
            self.slider_widget.deleteLater()
            layout.insertWidget(i,self.slider_widget)
        else:
            layout.addWidget(widget)
        self.slider_widget=widget
        self.read_filter()
    def _get_core(self):
        core_obj=self.connection.get_object(object_path=self.core_path)
        core=dbus.Interface(core_obj,dbus_interface=self.core_iface)
        return core
    def sink_added(self,sink):
        #TODO: preserve selected sink
        self.update_sinks()
    def sink_removed(self,sink):
        #TODO: preserve selected sink, try connecting to backup otherwise
        if sink==self.sink_name:
            #connect to new sink?
            pass
        self.update_sinks()
    def save_profile(self):
        #popup dialog box for name
        current=self.profile_box.currentIndex()
        profile,ok=QtGui.QInputDialog.getItem(self,'Preset Name','Preset',self.profiles,current)
        if not ok or profile=='':
            return
        if profile in self.profiles:
            mbox=QtGui.QMessageBox(self)
            mbox.setText('%s preset already exists'%(profile,))
            mbox.setInformativeText('Do you want to save over it?')
            mbox.setStandardButtons(mbox.Save|mbox.Discard|mbox.Cancel)
            mbox.setDefaultButton(mbox.Save)
            ret=mbox.exec_()
            if ret!=mbox.Save:
                return
        self.sink.SaveProfile(self.filter_state.channel,dbus.String(profile))
        if self.filter_state.channel==self.filter_state.channels:
            for x in range(1,self.filter_state.channels):
                self.sink.LoadProfile(x,dbus.String(profile))
    def remove_profile(self):
        #find active profile name, remove it
        profile=self.profile_box.currentText()
        manager=dbus.Interface(self.manager_obj,dbus_interface=self.manager_iface)
        manager.RemoveProfile(dbus.String(profile))
    def load_profile(self,x):
        profile=self.profile_box.itemText(x)
        self.filter_state.load_profile(profile)
    def select_channel(self,x):
        self.filter_state.channel = self.channel_box.itemData(x).toPyObject()
        self._set_profile_name()
        self.filter_state.readback()

    #TODO: add back in preamp!
    #print frequencies
    #main_layout.addLayout(self.create_slider(partial(self.update_coefficient,0),
    #    'Preamp')[0]
    #)
    def set_connection(self):
        self.connection=connect()
        self.manager_obj=self.connection.get_object(object_path=self.manager_path)
        manager_props=dbus.Interface(self.manager_obj,dbus_interface=prop_iface)
        self.sinks=manager_props.Get(self.manager_iface,'EqualizedSinks')
    def set_callbacks(self):
        manager=dbus.Interface(self.manager_obj,dbus_interface=self.manager_iface)
        manager.connect_to_signal('ProfilesChanged',self.update_profiles)
        manager.connect_to_signal('SinkAdded',self.sink_added)
        manager.connect_to_signal('SinkRemoved',self.sink_removed)
        #self._get_core().ListenForSignal(self.manager_iface,[])
        #self._get_core().ListenForSignal(self.manager_iface,[dbus.ObjectPath(self.manager_path)])
        #core=self._get_core()
        #for x in ['ProfilesChanged','SinkAdded','SinkRemoved']:
        #    core.ListenForSignal("%s.%s" %(self.manager_iface,x),[dbus.ObjectPath(self.manager_path)])
        self.update_profiles()
        self.update_sinks()
    def update_profiles(self):
        #print 'update profiles called!'
        manager_props=dbus.Interface(self.manager_obj,dbus_interface=prop_iface)
        self.profiles=manager_props.Get(self.manager_iface,'Profiles')
        self.profile_box.blockSignals(True)
        self.profile_box.clear()
        self.profile_box.addItems(self.profiles)
        self.profile_box.blockSignals(False)
        self._set_profile_name()
    def update_sinks(self):
        self.sink_box.blockSignals(True)
        self.sink_box.clear()
        for x in self.sinks:
            sink=self.connection.get_object(object_path=x)
            sink_props=dbus.Interface(sink,dbus_interface=prop_iface)
            simple_name=sink_props.Get(device_iface,'Name')
            self.sink_box.addItem(simple_name,x)
        self.sink_box.blockSignals(False)
        self.sink_box.setMinimumSize(self.sink_box.sizeHint())
    def read_filter(self):
        #print self.filter_frequencies
        self.filter_state.readback()
    def reset(self):
        coefs=dbus.Array([1/math.sqrt(2.0)]*(self.filter_state.filter_rate//2+1))
        preamp=1.0
        self.filter_state.set_filter(preamp,coefs)
    def _set_profile_name(self):
        self.profile_box.blockSignals(True)
        profile_name=self.sink.BaseProfile(self.filter_state.channel)
        if profile_name is not None:
            i=self.profile_box.findText(profile_name)
            if i>=0:
                self.profile_box.setCurrentIndex(i)
        self.profile_box.blockSignals(False)


class SliderArray(QtGui.QWidget):
    def __init__(self,filter_state,parent=None):
        super(SliderArray,self).__init__(parent)
        #self.setStyleSheet('padding: 0px; border-width: 0px; margin: 0px;')
        #self.setStyleSheet('font-size: 7pt; font-family: monospace;'+outline%('blue'))
        self.filter_state=filter_state
        self.setLayout(QtGui.QHBoxLayout())
        self.sub_array=None
        self.set_sub_array(SliderArraySub(self.filter_state))
        self.inhibit_resize=0
    def set_sub_array(self,widget):
        if self.sub_array is not None:
            self.layout().removeWidget(self.sub_array)
            self.sub_array.disconnect_signals()
            self.sub_array.deleteLater()
        self.sub_array=widget
        self.layout().addWidget(self.sub_array)
        self.sub_array.connect_signals()
        self.filter_state.readback()
    def resizeEvent(self,event):
        super(SliderArray,self).resizeEvent(event)
        if self.inhibit_resize==0:
            self.inhibit_resize+=1
            #self.add_sliders_to_fit()
            t=QtCore.QTimer(self)
            t.setSingleShot(True)
            t.setInterval(0)
            t.timeout.connect(partial(self.add_sliders_to_fit,event))
            t.start()
    def add_sliders_to_fit(self,event):
        if event.oldSize().width()>0 and event.size().width()>0:
            i=len(self.filter_state.frequencies)*int(round(float(event.size().width())/event.oldSize().width()))
        else:
            i=len(self.filter_state.frequencies)

        t_w=self.size().width()
        def evaluate(filter_state, target, variable):
            base_freqs=self.filter_state.freq_proper(self.filter_state.DEFAULT_FREQUENCIES)
            filter_state._set_frequency_values(subdivide(base_freqs,variable))
            new_widget=SliderArraySub(filter_state)
            w=new_widget.sizeHint().width()
            return w-target
        def searcher(initial,evaluator):
            i=initial
            def d(e): return 1 if e>=0 else -1
            error=evaluator(i)
            old_direction=d(error)
            i-=old_direction
            while True:
                error=evaluator(i)
                direction=d(error)
                if direction!=old_direction:
                    k=i-1
                    #while direction<0 and error!=0:
                    #    k-=1
                    #    error=evaluator(i)
                    #    direction=d(error)
                    return k, evaluator(k)
                i-=direction
                old_direction=direction
        searcher(i,partial(evaluate,self.filter_state,t_w))
        self.set_sub_array(SliderArraySub(self.filter_state))
        self.inhibit_resize-=1

class SliderArraySub(QtGui.QWidget):
    def __init__(self,filter_state,parent=None):
        super(SliderArraySub,self).__init__(parent)
        self.filter_state=filter_state
        self.setLayout(QtGui.QGridLayout())
        self.slider=[None]*len(self.filter_state.frequencies)
        self.label=[None]*len(self.slider)
        #self.setStyleSheet('padding: 0px; border-width: 0px; margin: 0px;')
        #self.setStyleSheet('font-size: 7pt; font-family: monospace;'+outline%('blue'))
        qt=QtCore.Qt
        #self.layout().setHorizontalSpacing(1)
        def add_slider(slider,label, c):
            self.layout().addWidget(slider,0,c,qt.AlignHCenter)
            self.layout().addWidget(label,1,c,qt.AlignHCenter)
            self.layout().setColumnMinimumWidth(c,max(label.sizeHint().width(),slider.sizeHint().width()))
        def create_slider(slider_label):
            slider=QtGui.QSlider(QtCore.Qt.Vertical,self)
            label=SliderLabel(slider_label,filter_state,self)
            slider.setRange(-1000,2000)
            slider.setSingleStep(1)
            return (slider,label)
        self.preamp_slider,self.preamp_label=create_slider('Preamp')
        add_slider(self.preamp_slider,self.preamp_label,0)
        for i,hz in enumerate(self.filter_state.frequencies):
            slider,label=create_slider(self.hz2label(hz))
            self.slider[i]=slider
            #slider.setStyleSheet('font-size: 7pt; font-family: monospace;'+outline%('red',))
            self.label[i]=label
            c=i+1
            add_slider(slider,label,i+1)
    def hz2label(self, hz):
        if hz==0:
            label_text='DC'
        elif hz==self.filter_state.sample_rate//2:
            label_text='Coda'
        else:
            label_text=hz2str(hz)
        return label_text

    def connect_signals(self):
        def connect(writer,reader,slider,label):
            slider.valueChanged.connect(writer)
            self.filter_state.readFilter.connect(reader)
            label_cb=partial(slider.setValue,0)
            label.clicked.connect(label_cb)
            return label_cb

        self.preamp_writer_cb=self.write_preamp
        self.preamp_reader_cb=self.sync_preamp
        self.preamp_label_cb=connect(self.preamp_writer_cb,
                self.preamp_reader_cb,
                self.preamp_slider,
                self.preamp_label)
        self.writer_callbacks=[None]*len(self.slider)
        self.reader_callbacks=[None]*len(self.slider)
        self.label_callbacks=[None]*len(self.label)
        for i in range(len(self.slider)):
            self.writer_callbacks[i]=partial(self.write_coefficient,i)
            self.reader_callbacks[i]=partial(self.sync_coefficient,i)
            self.label_callbacks[i]=connect(self.writer_callbacks[i],
                    self.reader_callbacks[i],
                    self.slider[i],
                    self.label[i])
    def disconnect_signals(self):
        def disconnect(writer,reader,label_cb,slider,label):
            slider.valueChanged.disconnect(writer)
            self.filter_state.readFilter.disconnect(reader)
            label.clicked.disconnect(label_cb)
        disconnect(self.preamp_writer_cb, self.preamp_reader_cb,
                self.preamp_label_cb, self.preamp_slider, self.preamp_label)
        for i in range(len(self.slider)):
            disconnect(self.writer_callbacks[i],
                    self.reader_callbacks[i],
                    self.label_callbacks[i],
                    self.slider[i],
                    self.label[i])

    def write_preamp(self, v):
        self.filter_state.preamp=self.slider2coef(v)
        self.filter_state.seed()
    def sync_preamp(self):
        self.preamp_slider.blockSignals(True)
        self.preamp_slider.setValue(self.coef2slider(self.filter_state.preamp))
        self.preamp_slider.blockSignals(False)


    def write_coefficient(self,i,v):
        self.filter_state.coefficients[i]=self.slider2coef(v)/math.sqrt(2.0)
        self.filter_state.seed()
    def sync_coefficient(self,i):
        slider=self.slider[i]
        slider.blockSignals(True)
        slider.setValue(self.coef2slider(math.sqrt(2.0)*self.filter_state.coefficients[i]))
        slider.blockSignals(False)
    @staticmethod
    def slider2coef(x):
        return (1.0+(x/1000.0))
    @staticmethod
    def coef2slider(x):
        return int((x-1.0)*1000)
outline='border-width: 1px; border-style: solid; border-color: %s;'

class SliderLabel(QtGui.QLabel):
    clicked=QtCore.pyqtSignal()
    def __init__(self,label_text,filter_state,parent=None):
        super(SliderLabel,self).__init__(parent)
        self.setStyleSheet('font-size: 7pt; font-family: monospace;')
        self.setText(label_text)
        self.setMinimumSize(self.sizeHint())
    def mouseDoubleClickEvent(self, event):
        self.clicked.emit()
        super(SliderLabel,self).mouseDoubleClickEvent(event)

#until there are server side state savings, do it in the client but try and avoid
#simulaneous broadcasting situations
class FilterState(QtCore.QObject):
    #DEFAULT_FREQUENCIES=map(float,[25,50,75,100,150,200,300,400,500,800,1e3,1.5e3,3e3,5e3,7e3,10e3,15e3,20e3])
    DEFAULT_FREQUENCIES=[31.75,63.5,125,250,500,1e3,2e3,4e3,8e3,16e3]
    readFilter=QtCore.pyqtSignal()
    def __init__(self,sink):
        super(FilterState,self).__init__()
        self.sink_props=dbus.Interface(sink,dbus_interface=prop_iface)
        self.sink=dbus.Interface(sink,dbus_interface=eq_iface)
        self.sample_rate=self.get_eq_attr('SampleRate')
        self.filter_rate=self.get_eq_attr('FilterSampleRate')
        self.channels=self.get_eq_attr('NChannels')
        self.channel=self.channels
        self.set_frequency_values(self.DEFAULT_FREQUENCIES)
        self.sync_timer=QtCore.QTimer()
        self.sync_timer.setSingleShot(True)
        self.sync_timer.timeout.connect(self.save_state)

    def get_eq_attr(self,attr):
        return self.sink_props.Get(eq_iface,attr)
    def freq_proper(self,xs):
        return [0]+xs+[self.sample_rate//2]
    def _set_frequency_values(self,freqs):
        self.frequencies=freqs
        #print 'base',self.frequencies
        self.filter_frequencies=map(lambda x: int(round(x)), \
                self.translate_rates(self.filter_rate,self.sample_rate,
                    self.frequencies) \
                )
        self.coefficients=[0.0]*len(self.frequencies)
        self.preamp=1.0
    def set_frequency_values(self,freqs):
        self._set_frequency_values(self.freq_proper(freqs))
    @staticmethod
    def translate_rates(dst,src,rates):
        return list(map(lambda x: x*dst/src,rates))
    def seed(self):
        self.sink.SeedFilter(self.channel,self.filter_frequencies,self.coefficients,self.preamp)
        self.sync_timer.start(SYNC_TIMEOUT)
    def readback(self):
        coefs,preamp=self.sink.FilterAtPoints(self.channel,self.filter_frequencies)
        self.coefficients=coefs
        self.preamp=preamp
        self.readFilter.emit()
    def set_filter(self,preamp,coefs):
        self.sink.SetFilter(self.channel,dbus.Array(coefs),self.preamp)
        self.sync_timer.start(SYNC_TIMEOUT)
    def save_state(self):
        print 'saving state'
        self.sink.SaveState()
    def load_profile(self,profile):
        self.sink.LoadProfile(self.channel,dbus.String(profile))
        self.sync_timer.start(SYNC_TIMEOUT)
    def flush_state(self):
        if self.sync_timer.isActive():
            self.sync_timer.stop()
            self.save_state()


def safe_log(k,b):
    i=0
    while k//b!=0:
        i+=1
        k=k//b
    return i
def hz2str(hz):
    p=safe_log(hz,10.0)
    if p<3:
        return '%dHz' %(hz,)
    elif hz%1000==0:
        return '%dKHz' %(hz/(10.0**3),)
    else:
        return '%.1fKHz' %(hz/(10.0**3),)

def subdivide(xs, t_points):
    while len(xs)<t_points:
        m=[0]*(2*len(xs)-1)
        m[0:len(m):2]=xs
        for i in range(1,len(m),2):
            m[i]=(m[i-1]+m[i+1])//2
        xs=m
    p_drop=len(xs)-t_points
    p_drop_left=p_drop//2
    p_drop_right=p_drop-p_drop_left
    #print 'xs',xs
    #print 'dropping %d, %d left, %d right' %(p_drop,p_drop_left,p_drop_right)
    c=len(xs)//2
    left=xs[0:p_drop_left*2:2]+xs[p_drop_left*2:c]
    right=list(reversed(xs[c:]))
    right=right[0:p_drop_right*2:2]+right[p_drop_right*2:]
    right=list(reversed(right))
    return left+right

def main():
    dbus.mainloop.qt.DBusQtMainLoop(set_as_default=True)
    app=QtGui.QApplication(sys.argv)
    qpaeq_main=QPaeq()
    qpaeq_main.show()
    sys.exit(app.exec_())

if __name__=='__main__':
    main()