root/trunk/libffado/support/mixer-qt4/ffado/widgets/crossbarrouter.py

#
# Copyright (C) 2009 by Arnold Krille
#
# This file is part of FFADO
# FFADO = Free Firewire (pro-)audio drivers for linux
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) version 3 of the License.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

from PyQt4 import QtGui, QtCore
import dbus

import logging
log = logging.getLogger("crossbarrouter")

class VuMeter(QtGui.QFrame):
    def __init__(self, interface, output, input=None, parent=None):
        QtGui.QFrame.__init__(self, parent)
        self.setLineWidth(1)
        self.setFrameStyle(QtGui.QFrame.Panel|QtGui.QFrame.Sunken)
        self.setMinimumSize(20, 20)

        self.level = 0

        self.interface = interface

        self.output = output

    def updateLevel(self, value):
        self.level = value
        self.update()

    def paintEvent(self, event):
        p = QtGui.QPainter(self)
        value = self.level/4096
        r = self.rect()
        r.setHeight(r.height() * value)
        r.moveBottom(self.rect().height())
        p.fillRect(r, self.palette().highlight())

class OutputSwitcher(QtGui.QFrame):
    """
The name is a bit misleading. This widget selectes sources for a specified
destination.

In mixer-usage this widget is at the top of the input-channel. Because the input
of the mixer is an available output from the routers point.
"""
    def __init__(self, interface, outname, parent):
        QtGui.QFrame.__init__(self, parent)
        self.interface = interface
        self.outname = outname
        self.lastin = ""

        self.setLineWidth(1)
        self.setFrameStyle(QtGui.QFrame.Sunken|QtGui.QFrame.Panel)

        self.layout = QtGui.QGridLayout(self)
        self.setLayout(self.layout)

        self.lbl = QtGui.QLabel(self.outname, self)
        self.layout.addWidget(self.lbl, 0, 0)

        self.vu = VuMeter(self.interface, outname, parent=self)
        self.layout.addWidget(self.vu, 0, 1)

        sources = self.interface.getSourceNames()

        self.combo = QtGui.QComboBox(self)
        self.layout.addWidget(self.combo, 1, 0, 1, 2)
        self.combo.addItem("Disconnected")
        self.combo.addItems(sources)
        src = self.interface.getSourceForDestination(self.outname)
        if src != "":
            self.combo.setCurrentIndex(self.combo.findText(src))
        else:
            self.combo.setCurrentIndex(0)
        self.connect(self.combo, QtCore.SIGNAL("activated(QString)"), self.comboCurrentChanged)


    def peakValue(self, value):
        #self.vu.updateLevel(value)
        pass

    def comboCurrentChanged(self, inname):
        #log.debug("comboCurrentChanged( %s )" % inname)
        if inname == self.lastin:
            return
        if self.lastin != "":
            self.interface.setConnectionState(self.lastin, self.outname, False)

        if inname != "Disconnected":
            if self.interface.setConnectionState(str(inname), self.outname, True):
                self.lastin = str(inname)
            else:
                log.warning(" Failed to connect %s to %s" % (inname, self.outname))
        else:
            self.lastin = ""


class CrossbarRouter(QtGui.QWidget):
    def __init__(self, servername, basepath, parent=None):
        QtGui.QWidget.__init__(self, parent);
        self.bus = dbus.SessionBus()
        self.dev = self.bus.get_object(servername, basepath)
        self.interface = dbus.Interface(self.dev, dbus_interface="org.ffado.Control.Element.CrossbarRouter")

        self.settings = QtCore.QSettings(self)

        destinations = self.interface.getDestinationNames()
        self.outgroups = []
        for ch in destinations:
            tmp = str(ch).split(":")[0]
            if not tmp in self.outgroups:
                self.outgroups.append(tmp)

        self.biglayout = QtGui.QVBoxLayout(self)
        self.setLayout(self.biglayout)

        self.toplayout = QtGui.QHBoxLayout()
        self.biglayout.addLayout(self.toplayout)

        self.vubtn = QtGui.QPushButton("Switch VU", self)
        self.vubtn.setCheckable(True)
        self.connect(self.vubtn, QtCore.SIGNAL("toggled(bool)"), self.runVu)
        self.toplayout.addWidget(self.vubtn)

        self.layout = QtGui.QGridLayout()
        self.biglayout.addLayout(self.layout)

        self.switchers = {}
        for out in destinations:
            btn = OutputSwitcher(self.interface, out, self)
            self.layout.addWidget(btn, int(out.split(":")[-1]) + 1, self.outgroups.index(out.split(":")[0]))
            self.switchers[out] = btn

        self.timer = QtCore.QTimer(self)
        self.timer.setInterval(200)
        self.connect(self.timer, QtCore.SIGNAL("timeout()"), self.updateLevels)

        self.vubtn.setChecked(self.settings.value("crossbarrouter/runvu", False).toBool())

    def __del__(self):
        print "CrossbarRouter.__del__()"
        self.settings.setValue("crossbarrouter/runvu", self.vubtn.isChecked())

    def runVu(self, run=True):
        #log.debug("CrossbarRouter.runVu( %i )" % run)
        if run:
            self.timer.start()
        else:
            self.timer.stop()
            for sw in self.switchers:
                self.switchers[sw].peakValue(0)

    def updateLevels(self):
        #log.debug("CrossbarRouter.updateLevels()")
        peakvalues = self.interface.getPeakValues()
        log.debug("Got %i peaks" % len(peakvalues))
        for peak in peakvalues:
            #log.debug("peak = [%s,%s]" % (str(peak[0]),str(peak[1])))
            if peak[0] >= 0:
                self.switchers[peak[0]].peakValue(peak[1])

#
# vim: sw=4 ts=4 et