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Carla
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Audio plugin host https://kx.studio/carla
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Carla/source/carla_host.py

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  1. #!/usr/bin/env python3

  2. # -*- coding: utf-8 -*-

  3. 

  4. # Carla host code

  5. # Copyright (C) 2011-2013 Filipe Coelho <falktx@falktx.com>

  6. #

  7. # This program is free software; you can redistribute it and/or

  8. # modify it under the terms of the GNU General Public License as

  9. # published by the Free Software Foundation; either version 2 of

  10. # the License, or any later version.

  11. #

  12. # This program is distributed in the hope that it will be useful,

  13. # but WITHOUT ANY WARRANTY; without even the implied warranty of

  14. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

  15. # GNU General Public License for more details.

  16. #

  17. # For a full copy of the GNU General Public License see the doc/GPL.txt file.

  18. 

  19. # ------------------------------------------------------------------------------------------------------------

  20. # Imports (Global)

  21. 

  22. try:

  23.     from PyQt5.QtCore import QTimer

  24.     from PyQt5.QtGui import QPalette

  25.     from PyQt5.QtWidgets import QApplication, QMainWindow

  26. except:

  27.     from PyQt4.QtCore import QTimer

  28.     from PyQt4.QtGui import QApplication, QMainWindow, QPalette

  29. 

  30. # ------------------------------------------------------------------------------------------------------------

  31. # Imports (Custom)

  32. 

  33. import ui_carla_host

  34. 

  35. from carla_database import *

  36. from carla_settings import *

  37. from carla_style import *

  38. from carla_widgets import *

  39. 

  40. # ------------------------------------------------------------------------------------------------------------

  41. # PatchCanvas defines

  42. 

  43. CANVAS_ANTIALIASING_SMALL = 1

  44. CANVAS_EYECANDY_SMALL     = 1

  45. CANVAS_DEFAULT_THEME_NAME = "Modern Dark"

  46. 

  47. # ------------------------------------------------------------------------------------------------------------

  48. # Session Management support

  49. 

  50. LADISH_APP_NAME = os.getenv("LADISH_APP_NAME")

  51. NSM_URL         = os.getenv("NSM_URL")

  52. 

  53. # ------------------------------------------------------------------------------------------------------------

  54. # Dummy widget

  55. 

  56. class CarlaDummyW(object):

  57.     def __init__(self, parent):

  58.         object.__init__(self)

  59. 

  60.     # -----------------------------------------------------------------

  61. 

  62.     def getPluginCount(self):

  63.         return 0

  64. 

  65.     # -----------------------------------------------------------------

  66. 

  67.     def addPlugin(self, pluginId, isProjectLoading):

  68.         pass

  69. 

  70.     def removePlugin(self, pluginId):

  71.         pass

  72. 

  73.     def renamePlugin(self, pluginId, newName):

  74.         pass

  75. 

  76.     def removeAllPlugins(self):

  77.         pass

  78. 

  79.     # -----------------------------------------------------------------

  80. 

  81.     def engineStarted(self):

  82.         pass

  83. 

  84.     def engineStopped(self):

  85.         pass

  86. 

  87.     # -----------------------------------------------------------------

  88. 

  89.     def idleFast(self):

  90.         pass

  91. 

  92.     def idleSlow(self):

  93.         pass

  94. 

  95.     # -----------------------------------------------------------------

  96. 

  97.     def saveSettings(self, settings):

  98.         pass

  99. 

  100. # ------------------------------------------------------------------------------------------------------------

  101. # Host Window

  102. 

  103. class HostWindow(QMainWindow):

  104.     # signals

  105.     DebugCallback = pyqtSignal(int, int, int, float, str)

  106.     PluginAddedCallback = pyqtSignal(int)

  107.     PluginRemovedCallback = pyqtSignal(int)

  108.     PluginRenamedCallback = pyqtSignal(int, str)

  109.     ParameterValueChangedCallback = pyqtSignal(int, int, float)

  110.     ParameterDefaultChangedCallback = pyqtSignal(int, int, float)

  111.     ParameterMidiChannelChangedCallback = pyqtSignal(int, int, int)

  112.     ParameterMidiCcChangedCallback = pyqtSignal(int, int, int)

  113.     ProgramChangedCallback = pyqtSignal(int, int)

  114.     MidiProgramChangedCallback = pyqtSignal(int, int)

  115.     NoteOnCallback = pyqtSignal(int, int, int, int)

  116.     NoteOffCallback = pyqtSignal(int, int, int)

  117.     ShowGuiCallback = pyqtSignal(int, int)

  118.     UpdateCallback = pyqtSignal(int)

  119.     ReloadInfoCallback = pyqtSignal(int)

  120.     ReloadParametersCallback = pyqtSignal(int)

  121.     ReloadProgramsCallback = pyqtSignal(int)

  122.     ReloadAllCallback = pyqtSignal(int)

  123.     PatchbayClientAddedCallback = pyqtSignal(int, int, str)

  124.     PatchbayClientRemovedCallback = pyqtSignal(int, str)

  125.     PatchbayClientRenamedCallback = pyqtSignal(int, str)

  126.     PatchbayPortAddedCallback = pyqtSignal(int, int, int, str)

  127.     PatchbayPortRemovedCallback = pyqtSignal(int, int, str)

  128.     PatchbayPortRenamedCallback = pyqtSignal(int, int, str)

  129.     PatchbayConnectionAddedCallback = pyqtSignal(int, int, int)

  130.     PatchbayConnectionRemovedCallback = pyqtSignal(int)

  131.     PatchbayIconChangedCallback = pyqtSignal(int, int)

  132.     BufferSizeChangedCallback = pyqtSignal(int)

  133.     SampleRateChangedCallback = pyqtSignal(float)

  134.     ProcessModeChangedCallback = pyqtSignal(int)

  135.     EngineStartedCallback = pyqtSignal(str)

  136.     EngineStoppedChangedCallback = pyqtSignal()

  137.     NSM_AnnounceCallback = pyqtSignal(str)

  138.     NSM_OpenCallback = pyqtSignal(str)

  139.     NSM_SaveCallback = pyqtSignal()

  140.     ErrorCallback = pyqtSignal(str)

  141.     QuitCallback = pyqtSignal()

  142.     SIGTERM = pyqtSignal()

  143.     SIGUSR1 = pyqtSignal()

  144. 

  145.     def __init__(self, parent):

  146.         QMainWindow.__init__(self, parent)

  147.         self.ui = ui_carla_host.Ui_CarlaHostW()

  148.         self.ui.setupUi(self)

  149. 

  150.         if False:

  151.             Carla.gui = self

  152.             self.fContainer = CarlaDummyW(self)

  153. 

  154.         # -------------------------------------------------------------

  155.         # Set callback

  156. 

  157.         Carla.host.set_engine_callback(EngineCallback)

  158. 

  159.         # -------------------------------------------------------------

  160.         # Internal stuff

  161. 

  162.         self.fBufferSize = 0

  163.         self.fSampleRate = 0.0

  164. 

  165.         self.fIdleTimerFast = 0

  166.         self.fIdleTimerSlow = 0

  167. 

  168.         self.fIsProjectLoading = False

  169.         self.fProjectFilename  = ""

  170. 

  171.         self.fLadspaRdfNeedsUpdate = True

  172.         self.fLadspaRdfList = []

  173. 

  174.         self.fLastTransportFrame = 0

  175.         self.fLastTransportState = False

  176. 

  177.         self.fSavedSettings = {}

  178. 

  179.         if LADISH_APP_NAME:

  180.             self.fClientName         = LADISH_APP_NAME

  181.             self.fSessionManagerName = "LADISH"

  182.         elif NSM_URL:

  183.             self.fClientName         = "Carla.tmp"

  184.             self.fSessionManagerName = "Non Session Manager"

  185.         else:

  186.             self.fClientName         = "Carla"

  187.             self.fSessionManagerName = ""

  188. 

  189.         # -------------------------------------------------------------

  190.         # Load Settings

  191. 

  192.         self.loadSettings(True)

  193. 

  194.         # -------------------------------------------------------------

  195.         # Set up GUI (engine stopped)

  196. 

  197.         if Carla.isPlugin:

  198.             self.ui.act_file_new.setEnabled(False)

  199.             self.ui.act_file_open.setEnabled(False)

  200.             self.ui.act_engine_start.setEnabled(False)

  201.             self.ui.act_engine_stop.setEnabled(False)

  202.             self.ui.menu_Engine.setEnabled(False)

  203.         else:

  204.             self.ui.act_engine_start.setEnabled(True)

  205. 

  206.         self.ui.act_file_save.setEnabled(False)

  207.         self.ui.act_file_save_as.setEnabled(False)

  208.         self.ui.act_engine_stop.setEnabled(False)

  209.         self.ui.act_plugin_remove_all.setEnabled(False)

  210. 

  211.         self.ui.menu_PluginMacros.setEnabled(False)

  212.         self.ui.menu_Canvas.setEnabled(False)

  213. 

  214.         self.setTransportMenuEnabled(False)

  215. 

  216.         self.setProperWindowTitle()

  217. 

  218.         # -------------------------------------------------------------

  219.         # Connect actions to functions

  220. 

  221.         self.ui.act_file_new.triggered.connect(self.slot_fileNew)

  222.         self.ui.act_file_open.triggered.connect(self.slot_fileOpen)

  223.         self.ui.act_file_save.triggered.connect(self.slot_fileSave)

  224.         self.ui.act_file_save_as.triggered.connect(self.slot_fileSaveAs)

  225. 

  226.         self.ui.act_engine_start.triggered.connect(self.slot_engineStart)

  227.         self.ui.act_engine_stop.triggered.connect(self.slot_engineStop)

  228. 

  229.         self.ui.act_plugin_add.triggered.connect(self.slot_pluginAdd)

  230.         self.ui.act_plugin_add2.triggered.connect(self.slot_pluginAdd)

  231.         self.ui.act_plugin_remove_all.triggered.connect(self.slot_pluginRemoveAll)

  232. 

  233.         self.ui.act_transport_play.triggered.connect(self.slot_transportPlayPause)

  234.         self.ui.act_transport_stop.triggered.connect(self.slot_transportStop)

  235.         self.ui.act_transport_backwards.triggered.connect(self.slot_transportBackwards)

  236.         self.ui.act_transport_forwards.triggered.connect(self.slot_transportForwards)

  237. 

  238.         self.ui.act_help_about.triggered.connect(self.slot_aboutCarla)

  239.         self.ui.act_help_about_qt.triggered.connect(self.slot_aboutQt)

  240. 

  241.         #self.ui.splitter.splitterMoved.connect(self.slot_splitterMoved)

  242. 

  243.         #self.ui.cb_disk.currentIndexChanged.connect(self.slot_diskFolderChanged)

  244.         #self.ui.b_disk_add.clicked.connect(self.slot_diskFolderAdd)

  245.         #self.ui.b_disk_remove.clicked.connect(self.slot_diskFolderRemove)

  246.         #self.ui.fileTreeView.doubleClicked.connect(self.slot_fileTreeDoubleClicked)

  247. 

  248.         self.DebugCallback.connect(self.slot_handleDebugCallback)

  249.         self.PluginAddedCallback.connect(self.slot_handlePluginAddedCallback)

  250.         self.PluginRemovedCallback.connect(self.slot_handlePluginRemovedCallback)

  251.         self.PluginRenamedCallback.connect(self.slot_handlePluginRenamedCallback)

  252.         self.BufferSizeChangedCallback.connect(self.slot_handleBufferSizeChangedCallback)

  253.         self.SampleRateChangedCallback.connect(self.slot_handleSampleRateChangedCallback)

  254.         self.EngineStartedCallback.connect(self.slot_handleEngineStartedCallback)

  255.         self.EngineStoppedChangedCallback.connect(self.slot_handleEngineStoppedCallback)

  256.         #self.NSM_AnnounceCallback.connect(self.slot_handleNSM_AnnounceCallback)

  257.         #self.NSM_OpenCallback.connect(self.slot_handleNSM_OpenCallback)

  258.         #self.NSM_SaveCallback.connect(self.slot_handleNSM_SaveCallback)

  259.         #self.ErrorCallback.connect(self.slot_handleErrorCallback)

  260.         #self.QuitCallback.connect(self.slot_handleQuitCallback)

  261. 

  262.         self.SIGUSR1.connect(self.slot_handleSIGUSR1)

  263.         self.SIGTERM.connect(self.slot_handleSIGTERM)

  264. 

  265.         # -------------------------------------------------------------

  266.         # Final setup

  267. 

  268.         if Carla.isPlugin:

  269.             QTimer.singleShot(0, self.slot_engineStart)

  270.         elif NSM_URL:

  271.             Carla.host.nsm_ready()

  272. 

  273.     # -----------------------------------------------------------------

  274.     # Called by containers

  275. 

  276.     def openSettingsWindow(self, hasCanvas, hasCanvasGL):

  277.         dialog = CarlaSettingsW(self, hasCanvas, hasCanvasGL)

  278.         return dialog.exec_()

  279. 

  280.     # -----------------------------------------------------------------

  281.     # Internal stuff (files)

  282. 

  283.     def loadProjectNow(self):

  284.         if not self.fProjectFilename:

  285.             return qCritical("ERROR: loading project without filename set")

  286. 

  287.         # TESTING

  288.         if not Carla.host.is_engine_running():

  289.             self.slot_engineStart()

  290. 

  291.         self.fIsProjectLoading = True

  292.         Carla.host.load_project(self.fProjectFilename)

  293.         self.fIsProjectLoading = False

  294. 

  295.     @pyqtSlot()

  296.     def slot_loadProjectNow(self):

  297.         self.loadProjectNow()

  298. 

  299.     def loadProjectLater(self, filename):

  300.         self.fProjectFilename = filename

  301.         self.setProperWindowTitle()

  302.         QTimer.singleShot(0, self.slot_loadProjectNow)

  303. 

  304.     def saveProjectNow(self):

  305.         if not self.fProjectFilename:

  306.             return qCritical("ERROR: saving project without filename set")

  307. 

  308.         Carla.host.save_project(self.fProjectFilename)

  309. 

  310.     # -----------------------------------------------------------------

  311.     # Internal stuff (engine)

  312. 

  313.     def setEngineSettings(self, settings = None):

  314.         if Carla.isPlugin:

  315.             return "Plugin"

  316. 

  317.         if settings is None: settings = QSettings()

  318. 

  319.         forceStereo         = settings.value("Engine/ForceStereo",         CARLA_DEFAULT_FORCE_STEREO,          type=bool)

  320.         preferPluginBridges = settings.value("Engine/PreferPluginBridges", CARLA_DEFAULT_PREFER_PLUGIN_BRIDGES, type=bool)

  321.         preferUiBridges     = settings.value("Engine/PreferUiBridges",     CARLA_DEFAULT_PREFER_UI_BRIDGES,     type=bool)

  322.         uisAlwaysOnTop      = settings.value("Engine/OscUiTimeout",        CARLA_DEFAULT_UIS_ALWAYS_ON_TOP,     type=bool)

  323.         uiBridgesTimeout    = settings.value("Engine/OscUiTimeout",        CARLA_DEFAULT_UI_BRIDGES_TIMEOUT,    type=int)

  324. 

  325.         Carla.maxParameters = settings.value("Engine/MaxParameters",       CARLA_DEFAULT_MAX_PARAMETERS,        type=int)

  326. 

  327.         audioDriver         = settings.value("Engine/AudioDriver",         CARLA_DEFAULT_AUDIO_DRIVER,          type=str)

  328. 

  329.         if audioDriver == "JACK":

  330.             #transportMode  = settings.value("Engine/TransportMode",       TRANSPORT_MODE_JACK,                 type=int)

  331.             transportMode   = TRANSPORT_MODE_JACK

  332.         else:

  333.             transportMode   = TRANSPORT_MODE_INTERNAL

  334.             audioNumPeriods = settings.value("Engine/AudioBufferSize", CARLA_DEFAULT_AUDIO_NUM_PERIODS, type=int)

  335.             audioBufferSize = settings.value("Engine/AudioBufferSize", CARLA_DEFAULT_AUDIO_BUFFER_SIZE, type=int)

  336.             audioSampleRate = settings.value("Engine/AudioSampleRate", CARLA_DEFAULT_AUDIO_SAMPLE_RATE, type=int)

  337.             audioDevice     = settings.value("Engine/AudioDevice",     "",                              type=str)

  338. 

  339.             Carla.host.set_engine_option(OPTION_AUDIO_NUM_PERIODS, audioNumPeriods, "")

  340.             Carla.host.set_engine_option(OPTION_AUDIO_BUFFER_SIZE, audioBufferSize, "")

  341.             Carla.host.set_engine_option(OPTION_AUDIO_SAMPLE_RATE, audioSampleRate, "")

  342.             Carla.host.set_engine_option(OPTION_AUDIO_DEVICE,   0, audioDevice)

  343. 

  344.         if Carla.processMode == PROCESS_MODE_CONTINUOUS_RACK:

  345.             forceStereo = True

  346.         elif Carla.processMode == PROCESS_MODE_MULTIPLE_CLIENTS and LADISH_APP_NAME:

  347.             print("LADISH detected but using multiple clients (not allowed), forcing single client now")

  348.             Carla.processMode = PROCESS_MODE_SINGLE_CLIENT

  349. 

  350.         Carla.host.set_engine_option(OPTION_FORCE_STEREO,          forceStereo,         "")

  351.         Carla.host.set_engine_option(OPTION_PREFER_PLUGIN_BRIDGES, preferPluginBridges, "")

  352.         Carla.host.set_engine_option(OPTION_PREFER_UI_BRIDGES,     preferUiBridges,     "")

  353.         Carla.host.set_engine_option(OPTION_UIS_ALWAYS_ON_TOP,     uisAlwaysOnTop,      "")

  354.         Carla.host.set_engine_option(OPTION_UI_BRIDGES_TIMEOUT,    uiBridgesTimeout,    "")

  355.         Carla.host.set_engine_option(OPTION_PROCESS_MODE,          Carla.processMode,   "")

  356.         Carla.host.set_engine_option(OPTION_MAX_PARAMETERS,        Carla.maxParameters, "")

  357.         Carla.host.set_engine_option(OPTION_TRANSPORT_MODE,        transportMode,       "")

  358. 

  359.         return audioDriver

  360. 

  361.     def startEngine(self):

  362.         audioDriver = self.setEngineSettings()

  363. 

  364.         if not Carla.host.engine_init(audioDriver, self.fClientName):

  365.             #if self.fFirstEngineInit:

  366.                 #self.fFirstEngineInit = False

  367.                 #return

  368. 

  369.             audioError = cString(Carla.host.get_last_error())

  370. 

  371.             if audioError:

  372.                 QMessageBox.critical(self, self.tr("Error"), self.tr("Could not connect to Audio backend '%s', possible reasons:\n%s" % (audioDriver, audioError)))

  373.             else:

  374.                 QMessageBox.critical(self, self.tr("Error"), self.tr("Could not connect to Audio backend '%s'" % audioDriver))

  375.             return

  376. 

  377.         self.fBufferSize = Carla.host.get_buffer_size()

  378.         self.fSampleRate = Carla.host.get_sample_rate()

  379. 

  380.         #self.fFirstEngineInit = False

  381. 

  382.         # Peaks and TimeInfo

  383.         self.fIdleTimerFast = self.startTimer(30) #self.fSavedSettings["Main/RefreshInterval"])

  384.         # LEDs and edit dialog parameters

  385.         self.fIdleTimerSlow = self.startTimer(self.fSavedSettings["Main/RefreshInterval"]*2)

  386. 

  387.     def stopEngine(self):

  388.         if self.fContainer.getPluginCount() > 0:

  389.             ask = QMessageBox.question(self, self.tr("Warning"), self.tr("There are still some plugins loaded, you need to remove them to stop the engine.\n"

  390.                                                                          "Do you want to do this now?"),

  391.                                                                          QMessageBox.Yes | QMessageBox.No, QMessageBox.No)

  392.             if ask != QMessageBox.Yes:

  393.                 return

  394. 

  395.             self.ui.act_plugin_remove_all.setEnabled(False)

  396.             self.fContainer.removeAllPlugins()

  397. 

  398.         if Carla.host.is_engine_running() and not Carla.host.engine_close():

  399.             print(cString(Carla.host.get_last_error()))

  400. 

  401.         self.fBufferSize = 0

  402.         self.fSampleRate = 0.0

  403. 

  404.         if self.fIdleTimerFast != 0:

  405.             self.killTimer(self.fIdleTimerFast)

  406.             self.fIdleTimerFast = 0

  407. 

  408.         if self.fIdleTimerSlow != 0:

  409.             self.killTimer(self.fIdleTimerSlow)

  410.             self.fIdleTimerSlow = 0

  411. 

  412.     # -----------------------------------------------------------------

  413.     # Internal stuff (plugins)

  414. 

  415.     def getExtraStuff(self, plugin):

  416.         ptype = plugin['type']

  417. 

  418.         if ptype == PLUGIN_LADSPA:

  419.             uniqueId = plugin['uniqueId']

  420. 

  421.             self.maybeLoadRDFs()

  422. 

  423.             for rdfItem in self.fLadspaRdfList:

  424.                 if rdfItem.UniqueID == uniqueId:

  425.                     return pointer(rdfItem)

  426. 

  427.         elif ptype in (PLUGIN_GIG, PLUGIN_SF2, PLUGIN_SFZ):

  428.             if plugin['name'].lower().endswith(" (16 outputs)"):

  429.                 # return a dummy non-null pointer

  430.                 INTPOINTER = POINTER(c_int)

  431.                 int1 = c_int(0x1)

  432.                 addr = addressof(int1)

  433.                 return cast(addr, INTPOINTER)

  434. 

  435.         return c_nullptr

  436. 

  437.     def maybeLoadRDFs(self):

  438.         if not self.fLadspaRdfNeedsUpdate:

  439.             return

  440. 

  441.         self.fLadspaRdfNeedsUpdate = False

  442.         self.fLadspaRdfList = []

  443. 

  444.         if not haveLRDF:

  445.             return

  446. 

  447.         settingsDir  = os.path.join(HOME, ".config", "falkTX")

  448.         frLadspaFile = os.path.join(settingsDir, "ladspa_rdf.db")

  449. 

  450.         if os.path.exists(frLadspaFile):

  451.             frLadspa = open(frLadspaFile, 'r')

  452. 

  453.             try:

  454.                 self.fLadspaRdfList = ladspa_rdf.get_c_ladspa_rdfs(json.load(frLadspa))

  455.             except:

  456.                 pass

  457. 

  458.             frLadspa.close()

  459. 

  460.     def setLoadRDFsNeeded(self):

  461.         self.fLadspaRdfNeedsUpdate = True

  462. 

  463.     # -----------------------------------------------------------------

  464.     # Internal stuff (transport)

  465. 

  466.     def refreshTransport(self, forced = False):

  467.         if not Carla.host.is_engine_running():

  468.             return

  469.         if self.fSampleRate == 0.0:

  470.             return

  471. 

  472.         timeInfo = Carla.host.get_transport_info()

  473.         playing  = bool(timeInfo['playing'])

  474.         frame    = int(timeInfo['frame'])

  475. 

  476.         if playing != self.fLastTransportState or forced:

  477.             if playing:

  478.                 icon = getIcon("media-playback-pause")

  479.                 self.ui.act_transport_play.setChecked(True)

  480.                 self.ui.act_transport_play.setIcon(icon)

  481.                 self.ui.act_transport_play.setText(self.tr("&Pause"))

  482.             else:

  483.                 icon = getIcon("media-playback-start")

  484.                 self.ui.act_transport_play.setChecked(False)

  485.                 self.ui.act_transport_play.setIcon(icon)

  486.                 self.ui.act_transport_play.setText(self.tr("&Play"))

  487. 

  488.             self.fLastTransportState = playing

  489. 

  490.         if frame != self.fLastTransportFrame or forced:

  491.             time = frame / self.fSampleRate

  492.             secs = time % 60

  493.             mins = (time / 60) % 60

  494.             hrs  = (time / 3600) % 60

  495. 

  496.             #textTransport = "Transport %s, at %02i:%02i:%02i" % ("playing" if playing else "stopped", hrs, mins, secs)

  497.             #self.fInfoLabel.setText("%s | %s" % (self.fInfoText, textTransport))

  498. 

  499.             self.fLastTransportFrame = frame

  500. 

  501.     def setTransportMenuEnabled(self, enabled):

  502.         self.ui.act_transport_play.setEnabled(enabled)

  503.         self.ui.act_transport_stop.setEnabled(enabled)

  504.         self.ui.act_transport_backwards.setEnabled(enabled)

  505.         self.ui.act_transport_forwards.setEnabled(enabled)

  506.         self.ui.menu_Transport.setEnabled(enabled)

  507. 

  508.     # -----------------------------------------------------------------

  509.     # Internal stuff (settings)

  510. 

  511.     def loadSettings(self, firstTime):

  512.         settings = QSettings()

  513. 

  514.         if firstTime:

  515.             self.restoreGeometry(settings.value("Geometry", ""))

  516. 

  517.             showToolbar = settings.value("ShowToolbar", True, type=bool)

  518.             self.ui.act_settings_show_toolbar.setChecked(showToolbar)

  519.             self.ui.toolBar.setVisible(showToolbar)

  520. 

  521.             #if settings.contains("SplitterState"):

  522.                 #self.ui.splitter.restoreState(settings.value("SplitterState", ""))

  523.             #else:

  524.                 #self.ui.splitter.setSizes([99999, 210])

  525. 

  526.             #diskFolders = toList(settings.value("DiskFolders", [HOME]))

  527. 

  528.             #self.ui.cb_disk.setItemData(0, HOME)

  529. 

  530.             #for i in range(len(diskFolders)):

  531.                 #if i == 0: continue

  532.                 #folder = diskFolders[i]

  533.                 #self.ui.cb_disk.addItem(os.path.basename(folder), folder)

  534. 

  535.             if MACOS and not settings.value("Main/UseProTheme", True, type=bool):

  536.                 self.setUnifiedTitleAndToolBarOnMac(True)

  537. 

  538.         # ---------------------------------------------

  539.         # plugin checks

  540. 

  541.         if settings.value("Engine/DisableChecks", False, type=bool):

  542.             os.environ["CARLA_DISCOVERY_NO_PROCESSING_CHECKS"] = "true"

  543. 

  544.         elif os.getenv("CARLA_DISCOVERY_NO_PROCESSING_CHECKS"):

  545.             os.environ.pop("CARLA_DISCOVERY_NO_PROCESSING_CHECKS")

  546. 

  547.         # ---------------------------------------------

  548. 

  549.         if not Carla.isPlugin:

  550.             # engine

  551.             self.setEngineSettings(settings)

  552. 

  553.             # plugin paths

  554.             LADSPA_PATH = toList(settings.value("Paths/LADSPA", Carla.DEFAULT_LADSPA_PATH))

  555.             DSSI_PATH   = toList(settings.value("Paths/DSSI",   Carla.DEFAULT_DSSI_PATH))

  556.             LV2_PATH    = toList(settings.value("Paths/LV2",    Carla.DEFAULT_LV2_PATH))

  557.             VST_PATH    = toList(settings.value("Paths/VST",    Carla.DEFAULT_VST_PATH))

  558.             AU_PATH     = toList(settings.value("Paths/AU",     Carla.DEFAULT_AU_PATH))

  559.             CSOUND_PATH = toList(settings.value("Paths/CSOUND", Carla.DEFAULT_CSOUND_PATH))

  560.             GIG_PATH    = toList(settings.value("Paths/GIG",    Carla.DEFAULT_GIG_PATH))

  561.             SF2_PATH    = toList(settings.value("Paths/SF2",    Carla.DEFAULT_SF2_PATH))

  562.             SFZ_PATH    = toList(settings.value("Paths/SFZ",    Carla.DEFAULT_SFZ_PATH))

  563. 

  564.             os.environ["LADSPA_PATH"] = splitter.join(LADSPA_PATH)

  565.             os.environ["DSSI_PATH"]   = splitter.join(DSSI_PATH)

  566.             os.environ["LV2_PATH"]    = splitter.join(LV2_PATH)

  567.             os.environ["VST_PATH"]    = splitter.join(VST_PATH)

  568.             os.environ["AU_PATH"]     = splitter.join(AU_PATH)

  569.             os.environ["CSOUND_PATH"] = splitter.join(CSOUND_PATH)

  570.             os.environ["GIG_PATH"]    = splitter.join(GIG_PATH)

  571.             os.environ["SF2_PATH"]    = splitter.join(SF2_PATH)

  572.             os.environ["SFZ_PATH"]    = splitter.join(SFZ_PATH)

  573. 

  574.         # ---------------------------------------------

  575. 

  576.         self.fSavedSettings = {

  577.             "Main/DefaultProjectFolder":      settings.value("Main/DefaultProjectFolder", HOME, type=str),

  578.             "Main/RefreshInterval":           settings.value("Main/RefreshInterval",      50, type=int),

  579.             "Canvas/Theme":                   settings.value("Canvas/Theme",              CANVAS_DEFAULT_THEME_NAME, type=str),

  580.             "Canvas/AutoHideGroups":          settings.value("Canvas/AutoHideGroups",     False, type=bool),

  581.             "Canvas/UseBezierLines":          settings.value("Canvas/UseBezierLines",     True, type=bool),

  582.             "Canvas/EyeCandy":                settings.value("Canvas/EyeCandy",           CANVAS_EYECANDY_SMALL, type=int),

  583.             "Canvas/UseOpenGL":               settings.value("Canvas/UseOpenGL",          False, type=bool),

  584.             "Canvas/Antialiasing":            settings.value("Canvas/Antialiasing",       CANVAS_ANTIALIASING_SMALL, type=int),

  585.             "Canvas/HighQualityAntialiasing": settings.value("Canvas/HighQualityAntialiasing", False, type=bool),

  586.             "UseCustomMiniCanvasPaint":      (settings.value("Main/UseProTheme", True, type=bool) and

  587.                                               settings.value("Main/ProThemeColor", "Black", type=str).lower() == "black")

  588.         }

  589. 

  590.         # ---------------------------------------------

  591. 

  592.         if self.fIdleTimerFast != 0:

  593.             self.killTimer(self.fIdleTimerFast)

  594.             self.fIdleTimerFast = self.startTimer(30) #self.fSavedSettings["Main/RefreshInterval"])

  595. 

  596.         if self.fIdleTimerSlow != 0:

  597.             self.killTimer(self.fIdleTimerSlow)

  598.             self.fIdleTimerSlow = self.startTimer(self.fSavedSettings["Main/RefreshInterval"]*2)

  599. 

  600.     def saveSettings(self):

  601.         settings = QSettings()

  602. 

  603.         settings.setValue("Geometry", self.saveGeometry())

  604.         #settings.setValue("SplitterState", self.ui.splitter.saveState())

  605.         settings.setValue("ShowToolbar", self.ui.toolBar.isVisible())

  606.         #settings.setValue("HorizontalScrollBarValue", self.ui.graphicsView.horizontalScrollBar().value())

  607.         #settings.setValue("VerticalScrollBarValue", self.ui.graphicsView.verticalScrollBar().value())

  608. 

  609.         #diskFolders = []

  610. 

  611.         #for i in range(self.ui.cb_disk.count()):

  612.             #diskFolders.append(self.ui.cb_disk.itemData(i))

  613. 

  614.         #settings.setValue("DiskFolders", diskFolders)

  615. 

  616.         self.fContainer.saveSettings(settings)

  617. 

  618.     # -----------------------------------------------------------------

  619.     # Internal stuff (gui)

  620. 

  621.     def setProperWindowTitle(self):

  622.         title = self.fClientName

  623. 

  624.         if self.fProjectFilename:

  625.             title += " - %s" % os.path.basename(self.fProjectFilename)

  626.         if self.fSessionManagerName:

  627.             title += " (%s)" % self.fSessionManagerName

  628. 

  629.         self.setWindowTitle(title)

  630. 

  631.     # -----------------------------------------------------------------

  632. 

  633.     @pyqtSlot()

  634.     def slot_fileNew(self):

  635.         self.fContainer.removeAllPlugins()

  636.         self.fProjectFilename = ""

  637.         self.setProperWindowTitle()

  638. 

  639.     @pyqtSlot()

  640.     def slot_fileOpen(self):

  641.         fileFilter  = self.tr("Carla Project File (*.carxp)")

  642.         filenameTry = QFileDialog.getOpenFileName(self, self.tr("Open Carla Project File"), self.fSavedSettings["Main/DefaultProjectFolder"], filter=fileFilter)[0]

  643. 

  644.         if not filenameTry:

  645.             return

  646. 

  647.         newFile = True

  648. 

  649.         if self.fContainer.getPluginCount() > 0:

  650.             ask = QMessageBox.question(self, self.tr("Question"), self.tr("There are some plugins loaded, do you want to remove them now?"),

  651.                                                                           QMessageBox.Yes | QMessageBox.No, QMessageBox.No)

  652.             newFile = ask == QMessageBox.Yes

  653. 

  654.         if newFile:

  655.             self.fContainer.removeAllPlugins()

  656.             self.fProjectFilename = filenameTry

  657.             self.setProperWindowTitle()

  658.             self.loadProjectNow()

  659.         else:

  660.             filenameOld = self.fProjectFilename

  661.             self.fProjectFilename = filenameTry

  662.             self.loadProjectNow()

  663.             self.fProjectFilename = filenameOld

  664. 

  665.     @pyqtSlot()

  666.     def slot_fileSave(self, saveAs=False):

  667.         if self.fProjectFilename and not saveAs:

  668.             return self.saveProjectNow()

  669. 

  670.         fileFilter  = self.tr("Carla Project File (*.carxp)")

  671.         filenameTry = QFileDialog.getSaveFileName(self, self.tr("Save Carla Project File"), self.fSavedSettings["Main/DefaultProjectFolder"], filter=fileFilter)[0]

  672. 

  673.         if not filenameTry:

  674.             return

  675. 

  676.         if not filenameTry.endswith(".carxp"):

  677.             filenameTry += ".carxp"

  678. 

  679.         if self.fProjectFilename != filenameTry:

  680.             self.fProjectFilename = filenameTry

  681.             self.setProperWindowTitle()

  682. 

  683.         self.saveProjectNow()

  684. 

  685.     @pyqtSlot()

  686.     def slot_fileSaveAs(self):

  687.         self.slot_fileSave(True)

  688. 

  689.     # -----------------------------------------------------------------

  690. 

  691.     @pyqtSlot()

  692.     def slot_engineStart(self, doStart = True):

  693.         if doStart: self.startEngine()

  694. 

  695.         check = Carla.host.is_engine_running()

  696.         self.ui.menu_PluginMacros.setEnabled(check)

  697.         self.ui.menu_Canvas.setEnabled(check)

  698. 

  699.         if not Carla.isPlugin:

  700.             self.ui.act_file_save.setEnabled(check)

  701.             self.ui.act_engine_start.setEnabled(not check)

  702.             self.ui.act_engine_stop.setEnabled(check)

  703. 

  704.             if self.fSessionManagerName != "Non Session Manager":

  705.                 self.ui.act_file_open.setEnabled(check)

  706.                 self.ui.act_file_save_as.setEnabled(check)

  707. 

  708.             self.setTransportMenuEnabled(check)

  709. 

  710.         if check:

  711.             #self.fInfoText = "Engine running | SampleRate: %g | BufferSize: %i" % (self.fSampleRate, self.fBufferSize)

  712.             self.fContainer.engineStarted()

  713. 

  714.             if not Carla.isPlugin:

  715.                 self.refreshTransport(True)

  716. 

  717.     @pyqtSlot()

  718.     def slot_engineStop(self, doStop = True):

  719.         if doStop: self.stopEngine()

  720. 

  721.         check = Carla.host.is_engine_running()

  722.         self.ui.menu_PluginMacros.setEnabled(check)

  723.         self.ui.menu_Canvas.setEnabled(check)

  724. 

  725.         if not Carla.isPlugin:

  726.             self.ui.act_file_save.setEnabled(check)

  727.             self.ui.act_engine_start.setEnabled(not check)

  728.             self.ui.act_engine_stop.setEnabled(check)

  729. 

  730.             if self.fSessionManagerName != "Non Session Manager":

  731.                 self.ui.act_file_open.setEnabled(check)

  732.                 self.ui.act_file_save_as.setEnabled(check)

  733. 

  734.             self.setTransportMenuEnabled(check)

  735. 

  736.         if not check:

  737.             self.fContainer.engineStopped()

  738.             #self.fInfoText = ""

  739.             #self.fInfoLabel.setText("Engine stopped")

  740. 

  741.     # -----------------------------------------------------------------

  742. 

  743.     @pyqtSlot()

  744.     def slot_pluginAdd(self):

  745.         dialog = PluginDatabaseW(self)

  746. 

  747.         if not dialog.exec_():

  748.             return

  749. 

  750.         if not Carla.host.is_engine_running():

  751.             QMessageBox.warning(self, self.tr("Warning"), self.tr("Cannot add new plugins while engine is stopped"))

  752.             return

  753. 

  754.         btype    = dialog.fRetPlugin['build']

  755.         ptype    = dialog.fRetPlugin['type']

  756.         filename = dialog.fRetPlugin['binary']

  757.         label    = dialog.fRetPlugin['label']

  758.         extraStuff = self.getExtraStuff(dialog.fRetPlugin)

  759. 

  760.         if not Carla.host.add_plugin(btype, ptype, filename, None, label, c_nullptr):

  761.             CustomMessageBox(self, QMessageBox.Critical, self.tr("Error"), self.tr("Failed to load plugin"), cString(Carla.host.get_last_error()), QMessageBox.Ok, QMessageBox.Ok)

  762.             return

  763. 

  764.     @pyqtSlot()

  765.     def slot_pluginRemoveAll(self):

  766.         self.ui.act_plugin_remove_all.setEnabled(False)

  767.         self.fContainer.removeAllPlugins()

  768.         Carla.host.remove_all_plugins()

  769. 

  770.     # -----------------------------------------------------------------

  771. 

  772.     @pyqtSlot(bool)

  773.     def slot_transportPlayPause(self, toggled):

  774.         if not Carla.host.is_engine_running():

  775.             return

  776. 

  777.         if toggled:

  778.             Carla.host.transport_play()

  779.         else:

  780.             Carla.host.transport_pause()

  781. 

  782.         self.refreshTransport()

  783. 

  784.     @pyqtSlot()

  785.     def slot_transportStop(self):

  786.         if not Carla.host.is_engine_running():

  787.             return

  788. 

  789.         Carla.host.transport_pause()

  790.         Carla.host.transport_relocate(0)

  791. 

  792.         self.refreshTransport()

  793. 

  794.     @pyqtSlot()

  795.     def slot_transportBackwards(self):

  796.         if not Carla.host.is_engine_running():

  797.             return

  798. 

  799.         newFrame = Carla.host.get_current_transport_frame() - 100000

  800. 

  801.         if newFrame < 0:

  802.             newFrame = 0

  803. 

  804.         Carla.host.transport_relocate(newFrame)

  805. 

  806.     @pyqtSlot()

  807.     def slot_transportForwards(self):

  808.         if not Carla.host.is_engine_running():

  809.             return

  810. 

  811.         newFrame = Carla.host.get_current_transport_frame() + 100000

  812.         Carla.host.transport_relocate(newFrame)

  813. 

  814.     # -----------------------------------------------------------------

  815. 

  816.     @pyqtSlot()

  817.     def slot_aboutCarla(self):

  818.         CarlaAboutW(self).exec_()

  819. 

  820.     @pyqtSlot()

  821.     def slot_aboutQt(self):

  822.         QApplication.instance().aboutQt()

  823. 

  824.     # -----------------------------------------------------------------

  825. 

  826.     @pyqtSlot(int, int, int, float, str)

  827.     def slot_handleDebugCallback(self, pluginId, value1, value2, value3, valueStr):

  828.         print("DEBUG:", pluginId, value1, value2, value3, valueStr)

  829.         #self.ui.pte_log.appendPlainText(valueStr.replace("", "DEBUG: ").replace("", "ERROR: ").replace("", "").replace("\n", ""))

  830. 

  831.     @pyqtSlot(int)

  832.     def slot_handlePluginAddedCallback(self, pluginId):

  833.         self.fContainer.addPlugin(pluginId, self.fIsProjectLoading)

  834. 

  835.         if self.fContainer.getPluginCount() == 1:

  836.             self.ui.act_plugin_remove_all.setEnabled(True)

  837. 

  838.     @pyqtSlot(int)

  839.     def slot_handlePluginRemovedCallback(self, pluginId):

  840.         self.fContainer.removePlugin(pluginId)

  841. 

  842.         if self.fContainer.getPluginCount() == 0:

  843.             self.ui.act_plugin_remove_all.setEnabled(False)

  844. 

  845.     @pyqtSlot(int, str)

  846.     def slot_handlePluginRenamedCallback(self, pluginId, newName):

  847.         self.fContainer.renamePlugin(pluginId, newName)

  848. 

  849.     @pyqtSlot(int)

  850.     def slot_handleBufferSizeChangedCallback(self, newBufferSize):

  851.         self.fBufferSize = newBufferSize

  852.         #self.fInfoText   = "Engine running | SampleRate: %g | BufferSize: %i" % (self.fSampleRate, self.fBufferSize)

  853. 

  854.     @pyqtSlot(float)

  855.     def slot_handleSampleRateChangedCallback(self, newSampleRate):

  856.         self.fSampleRate = newSampleRate

  857.         #self.fInfoText   = "Engine running | SampleRate: %g | BufferSize: %i" % (self.fSampleRate, self.fBufferSize)

  858. 

  859.     # -----------------------------------------------------------------

  860. 

  861.     @pyqtSlot(str)

  862.     def slot_handleEngineStartedCallback(self, driverName):

  863.         self.fBufferSize = Carla.host.get_buffer_size()

  864.         self.fSampleRate = Carla.host.get_sample_rate()

  865. 

  866.         if self.fIdleTimerFast == 0:

  867.             self.fIdleTimerFast = self.startTimer(30) #self.fSavedSettings["Main/RefreshInterval"])

  868.         if self.fIdleTimerSlow == 0:

  869.             self.fIdleTimerSlow = self.startTimer(self.fSavedSettings["Main/RefreshInterval"]*2)

  870. 

  871.         self.slot_engineStart(False)

  872. 

  873.     @pyqtSlot()

  874.     def slot_handleEngineStoppedCallback(self):

  875.         self.fBufferSize = 0

  876.         self.fSampleRate = 0.0

  877. 

  878.         if self.fIdleTimerFast != 0:

  879.             self.killTimer(self.fIdleTimerFast)

  880.             self.fIdleTimerFast = 0

  881. 

  882.         if self.fIdleTimerSlow != 0:

  883.             self.killTimer(self.fIdleTimerSlow)

  884.             self.fIdleTimerSlow = 0

  885. 

  886.         if self.fContainer.getPluginCount() > 0:

  887.             self.ui.act_plugin_remove_all.setEnabled(False)

  888.             self.fContainer.removeAllPlugins() # FIXME?

  889. 

  890.         self.slot_engineStop(False)

  891. 

  892.     # -----------------------------------------------------------------

  893. 

  894.     @pyqtSlot()

  895.     def slot_handleSIGUSR1(self):

  896.         print("Got SIGUSR1 -> Saving project now")

  897.         #QTimer.singleShot(0, self, SLOT("slot_fileSave)

  898. 

  899.     @pyqtSlot()

  900.     def slot_handleSIGTERM(self):

  901.         print("Got SIGTERM -> Closing now")

  902.         self.close()

  903. 

  904.     # -----------------------------------------------------------------

  905. 

  906.     def timerEvent(self, event):

  907.         if event.timerId() == self.fIdleTimerFast:

  908.             if not Carla.isPlugin:

  909.                 Carla.host.engine_idle()

  910.                 self.refreshTransport()

  911. 

  912.             self.fContainer.idleFast()

  913. 

  914.         elif event.timerId() == self.fIdleTimerSlow:

  915.             self.fContainer.idleSlow()

  916. 

  917.         QMainWindow.timerEvent(self, event)

  918. 

  919.     def closeEvent(self, event):

  920.         if self.fIdleTimerFast != 0:

  921.             self.killTimer(self.fIdleTimerFast)

  922.             self.fIdleTimerFast = 0

  923. 

  924.         if self.fIdleTimerSlow != 0:

  925.             self.killTimer(self.fIdleTimerSlow)

  926.             self.fIdleTimerSlow = 0

  927. 

  928.         self.saveSettings()

  929. 

  930.         if Carla.host.is_engine_running():

  931.             Carla.host.set_engine_about_to_close()

  932.             self.ui.act_plugin_remove_all.setEnabled(False)

  933.             self.fContainer.removeAllPlugins()

  934.             self.stopEngine()

  935. 

  936.         QMainWindow.closeEvent(self, event)

  937. 

  938. # ------------------------------------------------------------------------------------------------------------

  939. # Engine callback

  940. 

  941. def EngineCallback(ptr, action, pluginId, value1, value2, value3, valueStr):

  942.     if pluginId < 0 or not Carla.gui:

  943.         return

  944. 

  945.     if action == CALLBACK_DEBUG:

  946.         Carla.gui.DebugCallback.emit(pluginId, value1, value2, value3, cString(valueStr))

  947.     elif action == CALLBACK_PLUGIN_ADDED:

  948.         Carla.gui.PluginAddedCallback.emit(pluginId)

  949.     elif action == CALLBACK_PLUGIN_REMOVED:

  950.         Carla.gui.PluginRemovedCallback.emit(pluginId)

  951.     elif action == CALLBACK_PLUGIN_RENAMED:

  952.         Carla.gui.PluginRenamedCallback.emit(pluginId, valueStr)

  953.     elif action == CALLBACK_PARAMETER_VALUE_CHANGED:

  954.         Carla.gui.ParameterValueChangedCallback.emit(pluginId, value1, value3)

  955.     elif action == CALLBACK_PARAMETER_DEFAULT_CHANGED:

  956.         Carla.gui.ParameterDefaultChangedCallback.emit(pluginId, value1, value3)

  957.     elif action == CALLBACK_PARAMETER_MIDI_CHANNEL_CHANGED:

  958.         Carla.gui.ParameterMidiChannelChangedCallback.emit(pluginId, value1, value2)

  959.     elif action == CALLBACK_PARAMETER_MIDI_CC_CHANGED:

  960.         Carla.gui.ParameterMidiCcChangedCallback.emit(pluginId, value1, value2)

  961.     elif action == CALLBACK_PROGRAM_CHANGED:

  962.         Carla.gui.ProgramChangedCallback.emit(pluginId, value1)

  963.     elif action == CALLBACK_MIDI_PROGRAM_CHANGED:

  964.         Carla.gui.MidiProgramChangedCallback.emit(pluginId, value1)

  965.     elif action == CALLBACK_NOTE_ON:

  966.         Carla.gui.NoteOnCallback.emit(pluginId, value1, value2, value3)

  967.     elif action == CALLBACK_NOTE_OFF:

  968.         Carla.gui.NoteOffCallback.emit(pluginId, value1, value2)

  969.     elif action == CALLBACK_SHOW_GUI:

  970.         Carla.gui.ShowGuiCallback.emit(pluginId, value1)

  971.     elif action == CALLBACK_UPDATE:

  972.         Carla.gui.UpdateCallback.emit(pluginId)

  973.     elif action == CALLBACK_RELOAD_INFO:

  974.         Carla.gui.ReloadInfoCallback.emit(pluginId)

  975.     elif action == CALLBACK_RELOAD_PARAMETERS:

  976.         Carla.gui.ReloadParametersCallback.emit(pluginId)

  977.     elif action == CALLBACK_RELOAD_PROGRAMS:

  978.         Carla.gui.ReloadProgramsCallback.emit(pluginId)

  979.     elif action == CALLBACK_RELOAD_ALL:

  980.         Carla.gui.ReloadAllCallback.emit(pluginId)

  981.     elif action == CALLBACK_PATCHBAY_CLIENT_ADDED:

  982.         Carla.gui.PatchbayClientAddedCallback.emit(value1, value2, cString(valueStr))

  983.     elif action == CALLBACK_PATCHBAY_CLIENT_REMOVED:

  984.         Carla.gui.PatchbayClientRemovedCallback.emit(value1, cString(valueStr))

  985.     elif action == CALLBACK_PATCHBAY_CLIENT_RENAMED:

  986.         Carla.gui.PatchbayClientRenamedCallback.emit(value1, cString(valueStr))

  987.     elif action == CALLBACK_PATCHBAY_PORT_ADDED:

  988.         Carla.gui.PatchbayPortAddedCallback.emit(value1, value2, int(value3), cString(valueStr))

  989.     elif action == CALLBACK_PATCHBAY_PORT_REMOVED:

  990.         Carla.gui.PatchbayPortRemovedCallback.emit(value1, value2, cString(valueStr))

  991.     elif action == CALLBACK_PATCHBAY_PORT_RENAMED:

  992.         Carla.gui.PatchbayPortRenamedCallback.emit(value1, value2, cString(valueStr))

  993.     elif action == CALLBACK_PATCHBAY_CONNECTION_ADDED:

  994.         Carla.gui.PatchbayConnectionAddedCallback.emit(value1, value2, value3)

  995.     elif action == CALLBACK_PATCHBAY_CONNECTION_REMOVED:

  996.         Carla.gui.PatchbayConnectionRemovedCallback.emit(value1)

  997.     elif action == CALLBACK_PATCHBAY_ICON_CHANGED:

  998.         Carla.gui.PatchbayIconChangedCallback.emit(value1, value2)

  999.     elif action == CALLBACK_BUFFER_SIZE_CHANGED:

  1000.         Carla.gui.BufferSizeChangedCallback.emit(value1)

  1001.     elif action == CALLBACK_SAMPLE_RATE_CHANGED:

  1002.         Carla.gui.SampleRateChangedCallback.emit(value3)

  1003.     elif action == CALLBACK_PROCESS_MODE_CHANGED:

  1004.         Carla.gui.ProcessModeChangedCallback.emit(value1)

  1005.     elif action == CALLBACK_ENGINE_STARTED:

  1006.         Carla.gui.EngineStartedCallback.emit(cString(valueStr))

  1007.     elif action == CALLBACK_ENGINE_STOPPED:

  1008.         Carla.gui.EngineStoppedChangedCallback.emit()

  1009.     elif action == CALLBACK_NSM_ANNOUNCE:

  1010.         Carla.gui.NSM_AnnounceCallback.emit(cString(valueStr))

  1011.     elif action == CALLBACK_NSM_OPEN:

  1012.         Carla.gui.NSM_OpenCallback.emit(cString(valueStr))

  1013.     elif action == CALLBACK_NSM_SAVE:

  1014.         Carla.gui.NSM_SaveCallback.emit()

  1015.     elif action == CALLBACK_ERROR:

  1016.         Carla.gui.ErrorCallback.emit(cString(valueStr))

  1017.     elif action == CALLBACK_QUIT:

  1018.         Carla.gui.QuitCallback.emit()