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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) 2011-2014 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 (Config)

  21. 

  22. from carla_config import *

  23. 

  24. # ------------------------------------------------------------------------------------------------------------

  25. # Imports (Global)

  26. 

  27. if config_UseQt5:

  28.     from PyQt5.QtCore import qCritical, QFileInfo, QModelIndex, QTimer

  29.     from PyQt5.QtGui import QPalette

  30.     from PyQt5.QtWidgets import QAction, QApplication, QFileSystemModel, QListWidgetItem, QMainWindow

  31. else:

  32.     from PyQt4.QtCore import qCritical, QFileInfo, QModelIndex, QTimer

  33.     from PyQt4.QtGui import QApplication, QFileSystemModel, QListWidgetItem, QMainWindow, QPalette

  34. 

  35. # ------------------------------------------------------------------------------------------------------------

  36. # Imports (Custom)

  37. 

  38. import ui_carla_host

  39. 

  40. from carla_app import *

  41. from carla_database import *

  42. from carla_settings import *

  43. from carla_widgets import *

  44. 

  45. # ------------------------------------------------------------------------------------------------------------

  46. # PatchCanvas defines

  47. 

  48. CANVAS_ANTIALIASING_SMALL = 1

  49. CANVAS_EYECANDY_SMALL     = 1

  50. 

  51. # ------------------------------------------------------------------------------------------------------------

  52. # Session Management support

  53. 

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

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

  56. 

  57. # ------------------------------------------------------------------------------------------------------------

  58. # Dummy widget

  59. 

  60. class CarlaDummyW(object):

  61.     def __init__(self, parent):

  62.         object.__init__(self)

  63. 

  64.     # -----------------------------------------------------------------

  65. 

  66.     def getPluginCount(self):

  67.         return 0

  68. 

  69.     # -----------------------------------------------------------------

  70. 

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

  72.         pass

  73. 

  74.     def removePlugin(self, pluginId):

  75.         pass

  76. 

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

  78.         pass

  79. 

  80.     def disablePlugin(self, pluginId, errorMsg):

  81.         pass

  82. 

  83.     def removeAllPlugins(self):

  84.         pass

  85. 

  86.     # -----------------------------------------------------------------

  87. 

  88.     def engineStarted(self):

  89.         pass

  90. 

  91.     def engineStopped(self):

  92.         pass

  93. 

  94.     def engineChanged(self):

  95.         pass

  96. 

  97.     # -----------------------------------------------------------------

  98. 

  99.     def idleFast(self):

  100.         pass

  101. 

  102.     def idleSlow(self):

  103.         pass

  104. 

  105.     # -----------------------------------------------------------------

  106. 

  107.     def projectLoadingStarted(self):

  108.         pass

  109. 

  110.     def projectLoadingFinished(self):

  111.         pass

  112. 

  113.     # -----------------------------------------------------------------

  114. 

  115.     def saveSettings(self, settings):

  116.         pass

  117. 

  118.     def showEditDialog(self, pluginId):

  119.         pass

  120. 

  121. # ------------------------------------------------------------------------------------------------------------

  122. # Host Window

  123. 

  124. class HostWindow(QMainWindow):

  125.     # signals

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

  127.     PluginAddedCallback = pyqtSignal(int, str)

  128.     PluginRemovedCallback = pyqtSignal(int)

  129.     PluginRenamedCallback = pyqtSignal(int, str)

  130.     PluginUnavailableCallback = pyqtSignal(int, str)

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

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

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

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

  135.     ProgramChangedCallback = pyqtSignal(int, int)

  136.     MidiProgramChangedCallback = pyqtSignal(int, int)

  137.     OptionChangedCallback = pyqtSignal(int, int, bool)

  138.     UiStateChangedCallback = pyqtSignal(int, int)

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

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

  141.     UpdateCallback = pyqtSignal(int)

  142.     ReloadInfoCallback = pyqtSignal(int)

  143.     ReloadParametersCallback = pyqtSignal(int)

  144.     ReloadProgramsCallback = pyqtSignal(int)

  145.     ReloadAllCallback = pyqtSignal(int)

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

  147.     PatchbayClientRemovedCallback = pyqtSignal(int)

  148.     PatchbayClientRenamedCallback = pyqtSignal(int, str)

  149.     PatchbayClientDataChangedCallback = pyqtSignal(int, int, int)

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

  151.     PatchbayPortRemovedCallback = pyqtSignal(int, int)

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

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

  154.     PatchbayConnectionRemovedCallback = pyqtSignal(int, int, int)

  155.     EngineStartedCallback = pyqtSignal(int, int, str)

  156.     EngineStoppedCallback = pyqtSignal()

  157.     ProcessModeChangedCallback = pyqtSignal(int)

  158.     TransportModeChangedCallback = pyqtSignal(int)

  159.     BufferSizeChangedCallback = pyqtSignal(int)

  160.     SampleRateChangedCallback = pyqtSignal(float)

  161.     InfoCallback = pyqtSignal(str)

  162.     ErrorCallback = pyqtSignal(str)

  163.     QuitCallback = pyqtSignal()

  164.     SIGTERM = pyqtSignal()

  165.     SIGUSR1 = pyqtSignal()

  166. 

  167.     def __init__(self, parent):

  168.         QMainWindow.__init__(self, parent)

  169.         self.ui = ui_carla_host.Ui_CarlaHostW()

  170.         self.ui.setupUi(self)

  171. 

  172.         if False:

  173.             # kdevelop likes this :)

  174.             gCarla.gui  = self

  175.             gCarla.host = Host("")

  176.             self.fContainer = CarlaDummyW(self)

  177. 

  178.         if MACOS and config_UseQt5:

  179.             self.ui.act_file_quit.setMenuRole(QAction.QuitRole)

  180.             self.ui.act_settings_configure.setMenuRole(QAction.PreferencesRole)

  181.             self.ui.act_help_about.setMenuRole(QAction.AboutRole)

  182.             self.ui.act_help_about_juce.setMenuRole(QAction.AboutQtRole)

  183.             self.ui.act_help_about_qt.setMenuRole(QAction.AboutQtRole)

  184.             self.ui.menu_Settings.setTitle("Panels")

  185.             #self.ui.menu_Help.hide()

  186. 

  187.         # -------------------------------------------------------------

  188.         # Internal stuff

  189. 

  190.         self.fIdleTimerFast = 0

  191.         self.fIdleTimerSlow = 0

  192. 

  193.         self.fIsProjectLoading = False

  194.         self.fProjectFilename  = ""

  195. 

  196.         self.fLadspaRdfNeedsUpdate = True

  197.         self.fLadspaRdfList = []

  198. 

  199.         self.fLastTransportFrame = 0

  200.         self.fLastTransportState = False

  201.         self.fTransportText = ""

  202. 

  203.         # when true, call engineChanged() asap

  204.         self.fEngineChanged = False

  205. 

  206.         # first attempt of auto-start engine doesn't show an error

  207.         self.fFirstEngineInit = True

  208. 

  209.         self.fSavedSettings = {}

  210. 

  211.         if gCarla.isPlugin:

  212.             self.fClientName         = "Carla-Plugin"

  213.             self.fSessionManagerName = "Plugin"

  214.         elif LADISH_APP_NAME:

  215.             self.fClientName         = LADISH_APP_NAME

  216.             self.fSessionManagerName = "LADISH"

  217.         elif NSM_URL:

  218.             self.fClientName         = "Carla" # "Carla.tmp"

  219.             self.fSessionManagerName = "Non Session Manager"

  220.         else:

  221.             self.fClientName         = "Carla"

  222.             self.fSessionManagerName = ""

  223. 

  224.         # -------------------------------------------------------------

  225.         # Load Settings

  226. 

  227.         self.loadSettings(True)

  228. 

  229.         # -------------------------------------------------------------

  230.         # Set up GUI (engine stopped)

  231. 

  232.         if gCarla.isPlugin:

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

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

  235.         else:

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

  237. 

  238.         if self.fSessionManagerName:

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

  240. 

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

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

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

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

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

  246. 

  247.         if gCarla.externalPatchbay:

  248.             self.ui.act_canvas_show_internal.setChecked(False)

  249.             self.ui.act_canvas_show_external.setChecked(True)

  250.         else:

  251.             self.ui.act_canvas_show_internal.setChecked(True)

  252.             self.ui.act_canvas_show_external.setChecked(False)

  253. 

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

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

  256. 

  257.         self.setTransportMenuEnabled(False)

  258. 

  259.         # -------------------------------------------------------------

  260.         # Set up GUI (disk)

  261. 

  262.         self.fDirModel = QFileSystemModel(self)

  263.         self.fDirModel.setRootPath(HOME)

  264. 

  265.         if gCarla.host is not None:

  266.             self.fDirModel.setNameFilters(gCarla.host.get_supported_file_extensions().split(";"))

  267. 

  268.         self.ui.fileTreeView.setModel(self.fDirModel)

  269.         self.ui.fileTreeView.setRootIndex(self.fDirModel.index(HOME))

  270.         self.ui.fileTreeView.setColumnHidden(1, True)

  271.         self.ui.fileTreeView.setColumnHidden(2, True)

  272.         self.ui.fileTreeView.setColumnHidden(3, True)

  273.         self.ui.fileTreeView.setHeaderHidden(True)

  274. 

  275.         # -------------------------------------------------------------

  276.         # Set up GUI (disk)

  277. 

  278.         #self.item1 = QListWidgetItem(self.ui.lw_plugins)

  279.         #self.item1.setFlags(Qt.ItemIsSelectable|Qt.ItemIsEnabled|Qt.ItemIsDragEnabled)

  280.         #self.item1.setIcon(QIcon(":/bitmaps/thumbs/zita-rev1.png"))

  281.         #self.item1.setText("zita-rev1")

  282.         #item1.setTextAlignment(Qt.ali)

  283.         #self.ui.lw_plugins.()

  284. 

  285.         # -------------------------------------------------------------

  286. 

  287.         self.setProperWindowTitle()

  288. 

  289.         # -------------------------------------------------------------

  290.         # Connect actions to functions

  291. 

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

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

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

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

  296. 

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

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

  299. 

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

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

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

  303. 

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

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

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

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

  308. 

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

  310.         self.ui.act_help_about_juce.triggered.connect(self.slot_aboutJuce)

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

  312. 

  313.         self.ui.cb_disk.currentIndexChanged.connect(self.slot_diskFolderChanged)

  314.         self.ui.b_disk_add.clicked.connect(self.slot_diskFolderAdd)

  315.         self.ui.b_disk_remove.clicked.connect(self.slot_diskFolderRemove)

  316.         self.ui.fileTreeView.doubleClicked.connect(self.slot_fileTreeDoubleClicked)

  317. 

  318.         self.DebugCallback.connect(self.slot_handleDebugCallback)

  319. 

  320.         self.PluginAddedCallback.connect(self.slot_handlePluginAddedCallback)

  321.         self.PluginRemovedCallback.connect(self.slot_handlePluginRemovedCallback)

  322.         self.PluginRenamedCallback.connect(self.slot_handlePluginRenamedCallback)

  323.         self.PluginUnavailableCallback.connect(self.slot_handlePluginUnavailableCallback)

  324. 

  325.         # parameter (rack, patchbay)

  326.         # program, midi-program, ui-state (rack, patchbay)

  327.         # note on, off (rack, patchbay)

  328.         # update, reload (rack, patchbay)

  329.         # patchbay

  330. 

  331.         self.EngineStartedCallback.connect(self.slot_handleEngineStartedCallback)

  332.         self.EngineStoppedCallback.connect(self.slot_handleEngineStoppedCallback)

  333. 

  334.         self.ProcessModeChangedCallback.connect(self.slot_handleProcessModeChangedCallback)

  335.         self.TransportModeChangedCallback.connect(self.slot_handleTransportModeChangedCallback)

  336. 

  337.         self.BufferSizeChangedCallback.connect(self.slot_handleBufferSizeChangedCallback)

  338.         self.SampleRateChangedCallback.connect(self.slot_handleSampleRateChangedCallback)

  339. 

  340.         self.InfoCallback.connect(self.slot_handleInfoCallback)

  341.         self.ErrorCallback.connect(self.slot_handleErrorCallback)

  342.         self.QuitCallback.connect(self.slot_handleQuitCallback)

  343. 

  344.         self.SIGUSR1.connect(self.slot_handleSIGUSR1)

  345.         self.SIGTERM.connect(self.slot_handleSIGTERM)

  346. 

  347.         # -------------------------------------------------------------

  348.         # Final setup

  349. 

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

  351. 

  352.     # -----------------------------------------------------------------

  353.     # Called by containers

  354. 

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

  356.         hasEngine = bool(self.fSessionManagerName != "Non Session Manager")

  357.         dialog = CarlaSettingsW(self, gCarla.host, hasCanvas, hasCanvasGL, hasEngine)

  358.         return dialog.exec_()

  359. 

  360.     def setupContainer(self, showCanvas, canvasThemeData = []):

  361.         if showCanvas:

  362.             canvasWidth, canvasHeight, canvasBg, canvasBrush, canvasPen = canvasThemeData

  363.             self.ui.miniCanvasPreview.setViewTheme(canvasBg, canvasBrush, canvasPen)

  364.             self.ui.miniCanvasPreview.init(self.fContainer.scene, canvasWidth, canvasHeight, self.fSavedSettings[CARLA_KEY_CUSTOM_PAINTING])

  365.         else:

  366.             self.ui.act_canvas_arrange.setVisible(False)

  367.             self.ui.act_canvas_print.setVisible(False)

  368.             self.ui.act_canvas_refresh.setVisible(False)

  369.             self.ui.act_canvas_save_image.setVisible(False)

  370.             self.ui.act_canvas_zoom_100.setVisible(False)

  371.             self.ui.act_canvas_zoom_fit.setVisible(False)

  372.             self.ui.act_canvas_zoom_in.setVisible(False)

  373.             self.ui.act_canvas_zoom_out.setVisible(False)

  374.             self.ui.act_settings_show_meters.setVisible(False)

  375.             self.ui.act_settings_show_keyboard.setVisible(False)

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

  377.             self.ui.menu_Canvas.setVisible(False)

  378.             self.ui.menu_Canvas_Zoom.setEnabled(False)

  379.             self.ui.menu_Canvas_Zoom.setVisible(False)

  380.             self.ui.miniCanvasPreview.hide()

  381. 

  382.         self.ui.splitter.insertWidget(1, self.fContainer)

  383. 

  384.     def updateContainer(self, canvasThemeData):

  385.         canvasWidth, canvasHeight, canvasBg, canvasBrush, canvasPen = canvasThemeData

  386.         self.ui.miniCanvasPreview.setViewTheme(canvasBg, canvasBrush, canvasPen)

  387.         self.ui.miniCanvasPreview.init(self.fContainer.scene, canvasWidth, canvasHeight, self.fSavedSettings[CARLA_KEY_CUSTOM_PAINTING])

  388. 

  389.     # -----------------------------------------------------------------

  390.     # Internal stuff (files)

  391. 

  392.     def loadProjectNow(self):

  393.         if not self.fProjectFilename:

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

  395. 

  396.         self.fContainer.projectLoadingStarted()

  397.         self.fIsProjectLoading = True

  398. 

  399.         if gCarla.host is not None:

  400.             gCarla.host.load_project(self.fProjectFilename)

  401. 

  402.         self.fIsProjectLoading = False

  403.         self.fContainer.projectLoadingFinished()

  404. 

  405.     @pyqtSlot()

  406.     def slot_loadProjectNow(self):

  407.         self.loadProjectNow()

  408. 

  409.     def loadProjectLater(self, filename):

  410.         self.fProjectFilename = QFileInfo(filename).absoluteFilePath()

  411.         self.setProperWindowTitle()

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

  413. 

  414.     def saveProjectNow(self):

  415.         if not self.fProjectFilename:

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

  417. 

  418.         gCarla.host.save_project(self.fProjectFilename)

  419. 

  420.     # -----------------------------------------------------------------

  421.     # Internal stuff (engine)

  422. 

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

  424.         if self.fSessionManagerName == "Non Session Manager":

  425.             return "JACK"

  426. 

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

  428. 

  429.         # -------------------------------------------------------------

  430.         # read settings (engine base)

  431. 

  432.         # bool values

  433.         try:

  434.             forceStereo = settings.value(CARLA_KEY_ENGINE_FORCE_STEREO, CARLA_DEFAULT_FORCE_STEREO, type=bool)

  435.         except:

  436.             forceStereo = CARLA_DEFAULT_FORCE_STEREO

  437. 

  438.         try:

  439.             preferPluginBridges = settings.value(CARLA_KEY_ENGINE_PREFER_PLUGIN_BRIDGES, CARLA_DEFAULT_PREFER_PLUGIN_BRIDGES, type=bool)

  440.         except:

  441.             preferPluginBridges = CARLA_DEFAULT_PREFER_PLUGIN_BRIDGES

  442. 

  443.         try:

  444.             preferUiBridges = settings.value(CARLA_KEY_ENGINE_PREFER_UI_BRIDGES, CARLA_DEFAULT_PREFER_UI_BRIDGES, type=bool)

  445.         except:

  446.             preferUiBridges = CARLA_DEFAULT_PREFER_UI_BRIDGES

  447. 

  448.         try:

  449.             uisAlwaysOnTop = settings.value(CARLA_KEY_ENGINE_UIS_ALWAYS_ON_TOP, CARLA_DEFAULT_UIS_ALWAYS_ON_TOP, type=bool)

  450.         except:

  451.             uisAlwaysOnTop = CARLA_DEFAULT_UIS_ALWAYS_ON_TOP

  452. 

  453.         # int values

  454.         try:

  455.             maxParameters = settings.value(CARLA_KEY_ENGINE_MAX_PARAMETERS, CARLA_DEFAULT_MAX_PARAMETERS, type=int)

  456.         except:

  457.             maxParameters = CARLA_DEFAULT_MAX_PARAMETERS

  458. 

  459.         try:

  460.             uiBridgesTimeout = settings.value(CARLA_KEY_ENGINE_UI_BRIDGES_TIMEOUT, CARLA_DEFAULT_UI_BRIDGES_TIMEOUT, type=int)

  461.         except:

  462.             uiBridgesTimeout = CARLA_DEFAULT_UI_BRIDGES_TIMEOUT

  463. 

  464.         # -------------------------------------------------------------

  465.         # read settings (plugin paths)

  466. 

  467.         LADSPA_PATH = toList(settings.value(CARLA_KEY_PATHS_LADSPA, CARLA_DEFAULT_LADSPA_PATH))

  468.         DSSI_PATH   = toList(settings.value(CARLA_KEY_PATHS_DSSI,   CARLA_DEFAULT_DSSI_PATH))

  469.         LV2_PATH    = toList(settings.value(CARLA_KEY_PATHS_LV2,    CARLA_DEFAULT_LV2_PATH))

  470.         VST_PATH    = toList(settings.value(CARLA_KEY_PATHS_VST,    CARLA_DEFAULT_VST_PATH))

  471.         VST3_PATH   = toList(settings.value(CARLA_KEY_PATHS_VST3,   CARLA_DEFAULT_VST3_PATH))

  472.         AU_PATH     = toList(settings.value(CARLA_KEY_PATHS_AU,     CARLA_DEFAULT_AU_PATH))

  473.         GIG_PATH    = toList(settings.value(CARLA_KEY_PATHS_GIG,    CARLA_DEFAULT_GIG_PATH))

  474.         SF2_PATH    = toList(settings.value(CARLA_KEY_PATHS_SF2,    CARLA_DEFAULT_SF2_PATH))

  475.         SFZ_PATH    = toList(settings.value(CARLA_KEY_PATHS_SFZ,    CARLA_DEFAULT_SFZ_PATH))

  476. 

  477.         # -------------------------------------------------------------

  478.         # read settings (other)

  479. 

  480.         # int values

  481.         try:

  482.             useCustomSkins = settings.value(CARLA_KEY_MAIN_USE_CUSTOM_SKINS, CARLA_DEFAULT_MAIN_USE_CUSTOM_SKINS, type=bool)

  483.         except:

  484.             useCustomSkins = CARLA_DEFAULT_MAIN_USE_CUSTOM_SKINS

  485. 

  486.         # -------------------------------------------------------------

  487.         # read settings (engine advanced)

  488. 

  489.         if gCarla.isPlugin:

  490.             audioDriver = "Plugin"

  491. 

  492.         else:

  493.             # enums

  494.             try:

  495.                 processMode = settings.value(CARLA_KEY_ENGINE_PROCESS_MODE, CARLA_DEFAULT_PROCESS_MODE, type=int)

  496.             except:

  497.                 processMode = CARLA_DEFAULT_PROCESS_MODE

  498. 

  499.             try:

  500.                 transportMode = settings.value(CARLA_KEY_ENGINE_TRANSPORT_MODE, CARLA_DEFAULT_TRANSPORT_MODE, type=int)

  501.             except:

  502.                 transportMode = CARLA_DEFAULT_TRANSPORT_MODE

  503. 

  504.             # driver name

  505.             try:

  506.                 audioDriver = settings.value(CARLA_KEY_ENGINE_AUDIO_DRIVER, CARLA_DEFAULT_AUDIO_DRIVER, type=str)

  507.             except:

  508.                 audioDriver = CARLA_DEFAULT_AUDIO_DRIVER

  509. 

  510.             # driver options

  511.             try:

  512.                 audioDevice = settings.value("%s%s/Device" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, audioDriver), "", type=str)

  513.             except:

  514.                 audioDevice = ""

  515. 

  516.             try:

  517.                 audioNumPeriods = settings.value("%s%s/NumPeriods" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, audioDriver), CARLA_DEFAULT_AUDIO_NUM_PERIODS, type=int)

  518.             except:

  519.                 audioNumPeriods = CARLA_DEFAULT_AUDIO_NUM_PERIODS

  520. 

  521.             try:

  522.                 audioBufferSize = settings.value("%s%s/BufferSize" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, audioDriver), CARLA_DEFAULT_AUDIO_BUFFER_SIZE, type=int)

  523.             except:

  524.                 audioBufferSize = CARLA_DEFAULT_AUDIO_BUFFER_SIZE

  525. 

  526.             try:

  527.                 audioSampleRate = settings.value("%s%s/SampleRate" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, audioDriver), CARLA_DEFAULT_AUDIO_SAMPLE_RATE, type=int)

  528.             except:

  529.                 audioSampleRate = CARLA_DEFAULT_AUDIO_SAMPLE_RATE

  530. 

  531.             # -------------------------------------------------------------

  532.             # fix things if needed

  533. 

  534.             if processMode == ENGINE_PROCESS_MODE_CONTINUOUS_RACK:

  535.                 forceStereo = True

  536.             elif processMode == ENGINE_PROCESS_MODE_MULTIPLE_CLIENTS and LADISH_APP_NAME:

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

  538.                 processMode = ENGINE_PROCESS_MODE_SINGLE_CLIENT

  539. 

  540.             if audioDriver != "JACK" and transportMode == ENGINE_TRANSPORT_MODE_JACK:

  541.                 transportMode = ENGINE_TRANSPORT_MODE_INTERNAL

  542. 

  543.         if gCarla.processModeForced or gCarla.isPlugin:

  544.             processMode = gCarla.processMode

  545. 

  546.         # -------------------------------------------------------------

  547.         # save this for later

  548. 

  549.         gCarla.maxParameters  = maxParameters

  550.         gCarla.useCustomSkins = useCustomSkins

  551. 

  552.         if gCarla.host is None:

  553.             return audioDriver

  554. 

  555.         # -------------------------------------------------------------

  556.         # apply settings

  557. 

  558.         gCarla.host.set_engine_option(ENGINE_OPTION_FORCE_STEREO,          forceStereo,         "")

  559.         gCarla.host.set_engine_option(ENGINE_OPTION_PREFER_PLUGIN_BRIDGES, preferPluginBridges, "")

  560.         gCarla.host.set_engine_option(ENGINE_OPTION_PREFER_UI_BRIDGES,     preferUiBridges,     "")

  561.         gCarla.host.set_engine_option(ENGINE_OPTION_UIS_ALWAYS_ON_TOP,     uisAlwaysOnTop,      "")

  562.         gCarla.host.set_engine_option(ENGINE_OPTION_MAX_PARAMETERS,        maxParameters,       "")

  563.         gCarla.host.set_engine_option(ENGINE_OPTION_UI_BRIDGES_TIMEOUT,    uiBridgesTimeout,    "")

  564. 

  565.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_LADSPA, splitter.join(LADSPA_PATH))

  566.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_DSSI,   splitter.join(DSSI_PATH))

  567.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_LV2,    splitter.join(LV2_PATH))

  568.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_VST,    splitter.join(VST_PATH))

  569.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_VST3,   splitter.join(VST3_PATH))

  570.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_AU,     splitter.join(AU_PATH))

  571.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_GIG,    splitter.join(GIG_PATH))

  572.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_SF2,    splitter.join(SF2_PATH))

  573.         gCarla.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_SFZ,    splitter.join(SFZ_PATH))

  574. 

  575.         if not gCarla.isPlugin:

  576.             gCarla.host.set_engine_option(ENGINE_OPTION_PROCESS_MODE,          processMode,         "")

  577.             gCarla.host.set_engine_option(ENGINE_OPTION_TRANSPORT_MODE,        transportMode,       "")

  578. 

  579.             gCarla.host.set_engine_option(ENGINE_OPTION_AUDIO_NUM_PERIODS,     audioNumPeriods,     "")

  580.             gCarla.host.set_engine_option(ENGINE_OPTION_AUDIO_BUFFER_SIZE,     audioBufferSize,     "")

  581.             gCarla.host.set_engine_option(ENGINE_OPTION_AUDIO_SAMPLE_RATE,     audioSampleRate,     "")

  582.             gCarla.host.set_engine_option(ENGINE_OPTION_AUDIO_DEVICE,          0,                   audioDevice)

  583. 

  584.         # -------------------------------------------------------------

  585.         # return selected driver name

  586. 

  587.         return audioDriver

  588. 

  589.     def startEngine(self):

  590.         audioDriver = self.setEngineSettings()

  591. 

  592.         if gCarla.host is not None and not gCarla.host.engine_init(audioDriver, self.fClientName):

  593.             if self.fFirstEngineInit:

  594.                 self.fFirstEngineInit = False

  595.                 return

  596. 

  597.             audioError = gCarla.host.get_last_error()

  598. 

  599.             if audioError:

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

  601.             else:

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

  603.             return

  604. 

  605.         self.fFirstEngineInit = False

  606. 

  607.     def stopEngine(self):

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

  609.             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"

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

  611.                                                                          QMessageBox.Yes | QMessageBox.No, QMessageBox.No)

  612.             if ask != QMessageBox.Yes:

  613.                 return

  614. 

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

  616.             self.fContainer.removeAllPlugins()

  617. 

  618.         if gCarla.host.is_engine_running() and not gCarla.host.engine_close():

  619.             print(gCarla.host.get_last_error())

  620. 

  621.     # -----------------------------------------------------------------

  622.     # Internal stuff (plugins)

  623. 

  624.     def getExtraPtr(self, plugin):

  625.         ptype = plugin['type']

  626. 

  627.         if ptype == PLUGIN_LADSPA:

  628.             uniqueId = plugin['uniqueId']

  629. 

  630.             self.maybeLoadRDFs()

  631. 

  632.             for rdfItem in self.fLadspaRdfList:

  633.                 if rdfItem.UniqueID == uniqueId:

  634.                     return pointer(rdfItem)

  635. 

  636.         elif ptype in (PLUGIN_GIG, PLUGIN_SF2):

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

  638.                 return c_char_p("true".encode("utf-8"))

  639. 

  640.         return None

  641. 

  642.     def maybeLoadRDFs(self):

  643.         if not self.fLadspaRdfNeedsUpdate:

  644.             return

  645. 

  646.         self.fLadspaRdfNeedsUpdate = False

  647.         self.fLadspaRdfList = []

  648. 

  649.         if not haveLRDF:

  650.             return

  651. 

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

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

  654. 

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

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

  657. 

  658.             try:

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

  660.             except:

  661.                 pass

  662. 

  663.             frLadspa.close()

  664. 

  665.     def setLoadRDFsNeeded(self):

  666.         self.fLadspaRdfNeedsUpdate = True

  667. 

  668.     # -----------------------------------------------------------------

  669.     # Internal stuff (transport)

  670. 

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

  672.         if gCarla.sampleRate == 0.0 or not gCarla.host.is_engine_running():

  673.             return

  674. 

  675.         timeInfo = gCarla.host.get_transport_info()

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

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

  678. 

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

  680.             if playing:

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

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

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

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

  685.             else:

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

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

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

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

  690. 

  691.             self.fLastTransportState = playing

  692. 

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

  694.             time = frame / gCarla.sampleRate

  695.             secs = time % 60

  696.             mins = (time / 60) % 60

  697.             hrs  = (time / 3600) % 60

  698. 

  699.             self.fTextTransport = "Transport %s, at %02i:%02i:%02i" % ("playing" if playing else "stopped", hrs, mins, secs)

  700.             self.fLastTransportFrame = frame

  701. 

  702.     def setTransportMenuEnabled(self, enabled):

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

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

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

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

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

  708. 

  709.     # -----------------------------------------------------------------

  710.     # Internal stuff (settings)

  711. 

  712.     def loadSettings(self, firstTime):

  713.         settings = QSettings()

  714. 

  715.         if firstTime:

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

  717. 

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

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

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

  721. 

  722.             if settings.contains("SplitterState"):

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

  724.             else:

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

  726. 

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

  728. 

  729.             self.ui.cb_disk.setItemData(0, HOME)

  730. 

  731.             for i in range(len(diskFolders)):

  732.                 if i == 0: continue

  733.                 folder = diskFolders[i]

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

  735. 

  736.             #if MACOS and not settings.value(CARLA_KEY_MAIN_USE_PRO_THEME, True, type=bool):

  737.             #    self.setUnifiedTitleAndToolBarOnMac(True)

  738. 

  739.         # ---------------------------------------------

  740. 

  741.         if gCarla.host is not None and not gCarla.isPlugin:

  742.             # engine

  743.             self.setEngineSettings(settings)

  744. 

  745.         # ---------------------------------------------

  746. 

  747.         # TODO

  748. 

  749.         self.fSavedSettings = {

  750.             CARLA_KEY_MAIN_PROJECT_FOLDER:     settings.value(CARLA_KEY_MAIN_PROJECT_FOLDER,     CARLA_DEFAULT_MAIN_PROJECT_FOLDER,     type=str),

  751.             CARLA_KEY_MAIN_REFRESH_INTERVAL:   settings.value(CARLA_KEY_MAIN_REFRESH_INTERVAL,   CARLA_DEFAULT_MAIN_REFRESH_INTERVAL,   type=int),

  752.             CARLA_KEY_CANVAS_THEME:            settings.value(CARLA_KEY_CANVAS_THEME,            CARLA_DEFAULT_CANVAS_THEME,            type=str),

  753.             CARLA_KEY_CANVAS_SIZE:             settings.value(CARLA_KEY_CANVAS_SIZE,             CARLA_DEFAULT_CANVAS_SIZE,             type=str),

  754.             CARLA_KEY_CANVAS_AUTO_HIDE_GROUPS: settings.value(CARLA_KEY_CANVAS_AUTO_HIDE_GROUPS, CARLA_DEFAULT_CANVAS_AUTO_HIDE_GROUPS, type=bool),

  755.             CARLA_KEY_CANVAS_USE_BEZIER_LINES: settings.value(CARLA_KEY_CANVAS_USE_BEZIER_LINES, CARLA_DEFAULT_CANVAS_USE_BEZIER_LINES, type=bool),

  756.             CARLA_KEY_CANVAS_EYE_CANDY:        settings.value(CARLA_KEY_CANVAS_EYE_CANDY,        CARLA_DEFAULT_CANVAS_EYE_CANDY,        type=int),

  757.             CARLA_KEY_CANVAS_USE_OPENGL:       settings.value(CARLA_KEY_CANVAS_USE_OPENGL,       CARLA_DEFAULT_CANVAS_USE_OPENGL,       type=bool),

  758.             CARLA_KEY_CANVAS_ANTIALIASING:     settings.value(CARLA_KEY_CANVAS_ANTIALIASING,     CARLA_DEFAULT_CANVAS_ANTIALIASING,     type=int),

  759.             CARLA_KEY_CANVAS_HQ_ANTIALIASING:  settings.value(CARLA_KEY_CANVAS_HQ_ANTIALIASING,  CARLA_DEFAULT_CANVAS_HQ_ANTIALIASING,  type=bool),

  760.             CARLA_KEY_CUSTOM_PAINTING:        (settings.value(CARLA_KEY_MAIN_USE_PRO_THEME, True, type=bool) and

  761.                                                settings.value(CARLA_KEY_MAIN_PRO_THEME_COLOR, "Black", type=str).lower() == "black")

  762.         }

  763. 

  764.         # ---------------------------------------------

  765. 

  766.         if self.fIdleTimerFast != 0:

  767.             self.killTimer(self.fIdleTimerFast)

  768.             self.fIdleTimerFast = self.startTimer(self.fSavedSettings[CARLA_KEY_MAIN_REFRESH_INTERVAL])

  769. 

  770.         if self.fIdleTimerSlow != 0:

  771.             self.killTimer(self.fIdleTimerSlow)

  772.             self.fIdleTimerSlow = self.startTimer(self.fSavedSettings[CARLA_KEY_MAIN_REFRESH_INTERVAL]*4)

  773. 

  774.     def saveSettings(self):

  775.         settings = QSettings()

  776. 

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

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

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

  780. 

  781.         diskFolders = []

  782. 

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

  784.             diskFolders.append(self.ui.cb_disk.itemData(i))

  785. 

  786.         settings.setValue("DiskFolders", diskFolders)

  787. 

  788.         self.fContainer.saveSettings(settings)

  789. 

  790.     # -----------------------------------------------------------------

  791.     # Internal stuff (gui)

  792. 

  793.     def killTimers(self):

  794.         if self.fIdleTimerFast != 0:

  795.             self.killTimer(self.fIdleTimerFast)

  796.             self.fIdleTimerFast = 0

  797. 

  798.         if self.fIdleTimerSlow != 0:

  799.             self.killTimer(self.fIdleTimerSlow)

  800.             self.fIdleTimerSlow = 0

  801. 

  802.     def setProperWindowTitle(self):

  803.         title = self.fClientName

  804. 

  805.         if self.fProjectFilename:

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

  807.         if self.fSessionManagerName:

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

  809. 

  810.         self.setWindowTitle(title)

  811. 

  812.     # -----------------------------------------------------------------

  813. 

  814.     @pyqtSlot()

  815.     def slot_fileNew(self):

  816.         self.fContainer.removeAllPlugins()

  817.         self.fProjectFilename = ""

  818.         self.setProperWindowTitle()

  819. 

  820.     @pyqtSlot()

  821.     def slot_fileOpen(self):

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

  823.         filename   = QFileDialog.getOpenFileName(self, self.tr("Open Carla Project File"), self.fSavedSettings[CARLA_KEY_MAIN_PROJECT_FOLDER], filter=fileFilter)

  824. 

  825.         if config_UseQt5:

  826.             filename = filename[0]

  827.         if not filename:

  828.             return

  829. 

  830.         newFile = True

  831. 

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

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

  834.                                                                           QMessageBox.Yes | QMessageBox.No, QMessageBox.No)

  835.             newFile = (ask == QMessageBox.Yes)

  836. 

  837.         if newFile:

  838.             self.fContainer.removeAllPlugins()

  839.             self.fProjectFilename = filename

  840.             self.setProperWindowTitle()

  841.             self.loadProjectNow()

  842.         else:

  843.             filenameOld = self.fProjectFilename

  844.             self.fProjectFilename = filename

  845.             self.loadProjectNow()

  846.             self.fProjectFilename = filenameOld

  847. 

  848.     @pyqtSlot()

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

  850.         if self.fProjectFilename and not saveAs:

  851.             return self.saveProjectNow()

  852. 

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

  854.         filename   = QFileDialog.getSaveFileName(self, self.tr("Save Carla Project File"), self.fSavedSettings[CARLA_KEY_MAIN_PROJECT_FOLDER], filter=fileFilter)

  855. 

  856.         if config_UseQt5:

  857.             filename = filename[0]

  858.         if not filename:

  859.             return

  860. 

  861.         if not filename.lower().endswith(".carxp"):

  862.             filename += ".carxp"

  863. 

  864.         if self.fProjectFilename != filename:

  865.             self.fProjectFilename = filename

  866.             self.setProperWindowTitle()

  867. 

  868.         self.saveProjectNow()

  869. 

  870.     @pyqtSlot()

  871.     def slot_fileSaveAs(self):

  872.         self.slot_fileSave(True)

  873. 

  874.     # -----------------------------------------------------------------

  875. 

  876.     @pyqtSlot()

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

  878.         if doStart: self.startEngine()

  879. 

  880.         check = gCarla.host is not None and gCarla.host.is_engine_running()

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

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

  883. 

  884.         if not gCarla.isPlugin:

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

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

  887. 

  888.             if not self.fSessionManagerName:

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

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

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

  892. 

  893.             self.setTransportMenuEnabled(check)

  894. 

  895.         if check:

  896.             if not gCarla.isPlugin:

  897.                 self.refreshTransport(True)

  898. 

  899.             self.fContainer.engineStarted()

  900. 

  901.     @pyqtSlot()

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

  903.         if doStop: self.stopEngine()

  904. 

  905.         # FIXME?

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

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

  908.             self.fContainer.removeAllPlugins()

  909. 

  910.         check = gCarla.host.is_engine_running()

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

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

  913. 

  914.         if not gCarla.isPlugin:

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

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

  917. 

  918.             if not self.fSessionManagerName:

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

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

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

  922. 

  923.             self.setTransportMenuEnabled(check)

  924. 

  925.         if not check:

  926.             self.fTextTransport = ""

  927.             self.fContainer.engineStopped()

  928. 

  929.     # -----------------------------------------------------------------

  930. 

  931.     @pyqtSlot()

  932.     def slot_pluginAdd(self, pluginToReplace = -1):

  933.         dialog = PluginDatabaseW(self)

  934. 

  935.         if not dialog.exec_():

  936.             return

  937. 

  938.         if gCarla.host is None:

  939.             return

  940.         if not gCarla.host.is_engine_running():

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

  942.             return

  943. 

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

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

  946.         filename = dialog.fRetPlugin['filename']

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

  948.         uniqueId = dialog.fRetPlugin['uniqueId']

  949.         extraPtr = self.getExtraPtr(dialog.fRetPlugin)

  950. 

  951.         if pluginToReplace >= 0:

  952.             if not gCarla.host.replace_plugin(pluginToReplace):

  953.                 CustomMessageBox(self, QMessageBox.Critical, self.tr("Error"), self.tr("Failed to replace plugin"), gCarla.host.get_last_error(), QMessageBox.Ok, QMessageBox.Ok)

  954.                 return

  955. 

  956.         ok = gCarla.host.add_plugin(btype, ptype, filename, None, label, uniqueId, extraPtr)

  957. 

  958.         if pluginToReplace >= 0:

  959.             gCarla.host.replace_plugin(self.fContainer.getPluginCount())

  960. 

  961.         if not ok:

  962.             CustomMessageBox(self, QMessageBox.Critical, self.tr("Error"), self.tr("Failed to load plugin"), gCarla.host.get_last_error(), QMessageBox.Ok, QMessageBox.Ok)

  963. 

  964.     @pyqtSlot()

  965.     def slot_pluginRemoveAll(self):

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

  967. 

  968.         count = self.fContainer.getPluginCount()

  969. 

  970.         if count == 0:

  971.             return

  972. 

  973.         self.fContainer.projectLoadingStarted()

  974. 

  975.         app = QApplication.instance()

  976.         for i in range(count):

  977.             app.processEvents()

  978.             gCarla.host.remove_plugin(count-i-1)

  979. 

  980.         self.fContainer.projectLoadingFinished()

  981. 

  982.         #self.fContainer.removeAllPlugins()

  983.         #gCarla.host.remove_all_plugins()

  984. 

  985.     # -----------------------------------------------------------------

  986. 

  987.     @pyqtSlot(bool)

  988.     def slot_transportPlayPause(self, toggled):

  989.         if not gCarla.host.is_engine_running():

  990.             return

  991. 

  992.         if toggled:

  993.             gCarla.host.transport_play()

  994.         else:

  995.             gCarla.host.transport_pause()

  996. 

  997.         self.refreshTransport()

  998. 

  999.     @pyqtSlot()

  1000.     def slot_transportStop(self):

  1001.         if not gCarla.host.is_engine_running():

  1002.             return

  1003. 

  1004.         gCarla.host.transport_pause()

  1005.         gCarla.host.transport_relocate(0)

  1006. 

  1007.         self.refreshTransport()

  1008. 

  1009.     @pyqtSlot()

  1010.     def slot_transportBackwards(self):

  1011.         if not gCarla.host.is_engine_running():

  1012.             return

  1013. 

  1014.         newFrame = gCarla.host.get_current_transport_frame() - 100000

  1015. 

  1016.         if newFrame < 0:

  1017.             newFrame = 0

  1018. 

  1019.         gCarla.host.transport_relocate(newFrame)

  1020. 

  1021.     @pyqtSlot()

  1022.     def slot_transportForwards(self):

  1023.         if not gCarla.host.is_engine_running():

  1024.             return

  1025. 

  1026.         newFrame = gCarla.host.get_current_transport_frame() + 100000

  1027.         gCarla.host.transport_relocate(newFrame)

  1028. 

  1029.     # -----------------------------------------------------------------

  1030. 

  1031.     @pyqtSlot()

  1032.     def slot_aboutCarla(self):

  1033.         CarlaAboutW(self, gCarla.host).exec_()

  1034. 

  1035.     @pyqtSlot()

  1036.     def slot_aboutJuce(self):

  1037.         JuceAboutW(self, gCarla.host).exec_()

  1038. 

  1039.     @pyqtSlot()

  1040.     def slot_aboutQt(self):

  1041.         QApplication.instance().aboutQt()

  1042. 

  1043.     # -----------------------------------------------------------------

  1044. 

  1045.     @pyqtSlot(int)

  1046.     def slot_diskFolderChanged(self, index):

  1047.         if index < 0:

  1048.             return

  1049.         elif index == 0:

  1050.             filename = HOME

  1051.             self.ui.b_disk_remove.setEnabled(False)

  1052.         else:

  1053.             filename = self.ui.cb_disk.itemData(index)

  1054.             self.ui.b_disk_remove.setEnabled(True)

  1055. 

  1056.         self.fDirModel.setRootPath(filename)

  1057.         self.ui.fileTreeView.setRootIndex(self.fDirModel.index(filename))

  1058. 

  1059.     @pyqtSlot()

  1060.     def slot_diskFolderAdd(self):

  1061.         newPath = QFileDialog.getExistingDirectory(self, self.tr("New Folder"), "", QFileDialog.ShowDirsOnly)

  1062. 

  1063.         if newPath:

  1064.             if newPath[-1] == os.sep:

  1065.                 newPath = newPath[:-1]

  1066.             self.ui.cb_disk.addItem(os.path.basename(newPath), newPath)

  1067.             self.ui.cb_disk.setCurrentIndex(self.ui.cb_disk.count()-1)

  1068.             self.ui.b_disk_remove.setEnabled(True)

  1069. 

  1070.     @pyqtSlot()

  1071.     def slot_diskFolderRemove(self):

  1072.         index = self.ui.cb_disk.currentIndex()

  1073. 

  1074.         if index <= 0:

  1075.             return

  1076. 

  1077.         self.ui.cb_disk.removeItem(index)

  1078. 

  1079.         if self.ui.cb_disk.currentIndex() == 0:

  1080.             self.ui.b_disk_remove.setEnabled(False)

  1081. 

  1082.     @pyqtSlot(QModelIndex)

  1083.     def slot_fileTreeDoubleClicked(self, modelIndex):

  1084.         filename = self.fDirModel.filePath(modelIndex)

  1085. 

  1086.         if not gCarla.host.load_file(filename):

  1087.             CustomMessageBox(self, QMessageBox.Critical, self.tr("Error"),

  1088.                              self.tr("Failed to load file"),

  1089.                              gCarla.host.get_last_error(), QMessageBox.Ok, QMessageBox.Ok)

  1090. 

  1091.     # -----------------------------------------------------------------

  1092. 

  1093.     @pyqtSlot(int, int, int, float, str)

  1094.     def slot_handleDebugCallback(self, pluginId, value1, value2, value3, valueStr):

  1095.         print("DEBUG:", pluginId, value1, value2, value3, valueStr)

  1096.         #self.ui.pte_log.appendPlainText(valueStr.replace("", "DEBUG: ").replace("", "ERROR: ").replace("", "").replace("\n", ""))

  1097. 

  1098.     # -----------------------------------------------------------------

  1099. 

  1100.     @pyqtSlot(int, str)

  1101.     def slot_handlePluginAddedCallback(self, pluginId, pluginName):

  1102.         self.fContainer.addPlugin(pluginId, self.fIsProjectLoading)

  1103. 

  1104.         if self.fContainer.getPluginCount() == 1:

  1105.             self.ui.act_plugin_remove_all.setEnabled(True)

  1106. 

  1107.     @pyqtSlot(int)

  1108.     def slot_handlePluginRemovedCallback(self, pluginId):

  1109.         self.fContainer.removePlugin(pluginId)

  1110. 

  1111.         if self.fContainer.getPluginCount() == 0:

  1112.             self.ui.act_plugin_remove_all.setEnabled(False)

  1113. 

  1114.     @pyqtSlot(int, str)

  1115.     def slot_handlePluginRenamedCallback(self, pluginId, newName):

  1116.         self.fContainer.renamePlugin(pluginId, newName)

  1117. 

  1118.     @pyqtSlot(int, str)

  1119.     def slot_handlePluginUnavailableCallback(self, pluginId, errorMsg):

  1120.         self.fContainer.disablePlugin(pluginId, errorMsg)

  1121. 

  1122.     # -----------------------------------------------------------------

  1123. 

  1124.     @pyqtSlot(str)

  1125.     def slot_handleEngineStartedCallback(self, processMode, transportMode, driverName):

  1126.         gCarla.processMode   = processMode

  1127.         gCarla.transportMode = transportMode

  1128.         gCarla.bufferSize    = gCarla.host.get_buffer_size()

  1129.         gCarla.sampleRate    = gCarla.host.get_sample_rate()

  1130. 

  1131.         self.slot_engineStart(False)

  1132. 

  1133.         if self.fIdleTimerFast == 0:

  1134.             self.fIdleTimerFast = self.startTimer(self.fSavedSettings[CARLA_KEY_MAIN_REFRESH_INTERVAL])

  1135.         if self.fIdleTimerSlow == 0:

  1136.             self.fIdleTimerSlow = self.startTimer(self.fSavedSettings[CARLA_KEY_MAIN_REFRESH_INTERVAL]*4)

  1137. 

  1138.     @pyqtSlot()

  1139.     def slot_handleEngineStoppedCallback(self):

  1140.         self.killTimers()

  1141.         self.slot_engineStop(False)

  1142. 

  1143.         gCarla.bufferSize = 0

  1144.         gCarla.sampleRate = 0.0

  1145. 

  1146.     # -----------------------------------------------------------------

  1147. 

  1148.     @pyqtSlot(int)

  1149.     def slot_handleProcessModeChangedCallback(self, newProcessMode):

  1150.         self.fEngineChanged = True

  1151. 

  1152.     @pyqtSlot(int)

  1153.     def slot_handleTransportModeChangedCallback(self, newTransportMode):

  1154.         self.fEngineChanged = True

  1155. 

  1156.     # -----------------------------------------------------------------

  1157. 

  1158.     @pyqtSlot(int)

  1159.     def slot_handleBufferSizeChangedCallback(self, newBufferSize):

  1160.         self.fEngineChanged = True

  1161. 

  1162.     @pyqtSlot(float)

  1163.     def slot_handleSampleRateChangedCallback(self, newSampleRate):

  1164.         self.fEngineChanged = True

  1165. 

  1166.     # -----------------------------------------------------------------

  1167. 

  1168.     @pyqtSlot(str)

  1169.     def slot_handleInfoCallback(self, info):

  1170.         QMessageBox.information(self, "Information", info)

  1171. 

  1172.     @pyqtSlot(str)

  1173.     def slot_handleErrorCallback(self, error):

  1174.         QMessageBox.critical(self, "Error", error)

  1175. 

  1176.     @pyqtSlot()

  1177.     def slot_handleQuitCallback(self):

  1178.         pass

  1179. 

  1180.     # -----------------------------------------------------------------

  1181. 

  1182.     @pyqtSlot()

  1183.     def slot_handleSIGUSR1(self):

  1184.         print("Got SIGUSR1 -> Saving project now")

  1185.         self.slot_fileSave()

  1186. 

  1187.     @pyqtSlot()

  1188.     def slot_handleSIGTERM(self):

  1189.         print("Got SIGTERM -> Closing now")

  1190.         self.close()

  1191. 

  1192.     # -----------------------------------------------------------------

  1193. 

  1194.     def showEvent(self, event):

  1195.         QMainWindow.showEvent(self, event)

  1196. 

  1197.         # set our gui as parent for all plugins UIs

  1198.         if gCarla.host is not None:

  1199.             winIdStr = "%x" % self.winId()

  1200.             gCarla.host.set_engine_option(ENGINE_OPTION_FRONTEND_WIN_ID, 0, winIdStr)

  1201. 

  1202.     def timerEvent(self, event):

  1203.         if event.timerId() == self.fIdleTimerFast:

  1204.             #if not gCarla.isPlugin:

  1205.             gCarla.host.engine_idle()

  1206.             self.refreshTransport()

  1207. 

  1208.             self.fContainer.idleFast()

  1209. 

  1210.         elif event.timerId() == self.fIdleTimerSlow:

  1211.             if self.fEngineChanged:

  1212.                 self.fContainer.engineChanged()

  1213.                 self.fEngineChanged = False

  1214. 

  1215.             self.fContainer.idleSlow()

  1216. 

  1217.         QMainWindow.timerEvent(self, event)

  1218. 

  1219.     def closeEvent(self, event):

  1220.         self.killTimers()

  1221.         self.saveSettings()

  1222. 

  1223.         if gCarla.host is None or gCarla.isPlugin:

  1224.             pass

  1225. 

  1226.         elif gCarla.host.is_engine_running():

  1227.             gCarla.host.set_engine_about_to_close()

  1228. 

  1229.             count = self.fContainer.getPluginCount()

  1230. 

  1231.             if count > 0:

  1232.                 # simulate project loading, to disable container

  1233.                 self.ui.act_plugin_remove_all.setEnabled(False)

  1234.                 self.fContainer.projectLoadingStarted()

  1235. 

  1236.                 app = QApplication.instance()

  1237.                 for i in range(count):

  1238.                     app.processEvents()

  1239.                     gCarla.host.remove_plugin(count-i-1)

  1240. 

  1241.                 app.processEvents()

  1242. 

  1243.                 #self.fContainer.removeAllPlugins()

  1244.                 #gCarla.host.remove_all_plugins()

  1245. 

  1246.             self.stopEngine()

  1247. 

  1248.         QMainWindow.closeEvent(self, event)

  1249. 

  1250. # ------------------------------------------------------------------------------------------------------------

  1251. # Engine callback

  1252. 

  1253. def engineCallback(ptr, action, pluginId, value1, value2, value3, valueStr):

  1254.     if action == ENGINE_CALLBACK_PROCESS_MODE_CHANGED:

  1255.         gCarla.processMode = value1

  1256.         if gCarla.gui is not None:

  1257.             gCarla.gui.ProcessModeChangedCallback.emit(value1)

  1258.         return

  1259. 

  1260.     if action == ENGINE_CALLBACK_TRANSPORT_MODE_CHANGED:

  1261.         gCarla.transportMode = value1

  1262.         if gCarla.gui is not None:

  1263.             gCarla.gui.TransportModeChangedCallback.emit(value1)

  1264.         return

  1265. 

  1266.     if action == ENGINE_CALLBACK_BUFFER_SIZE_CHANGED:

  1267.         gCarla.bufferSize = value1

  1268.         if gCarla.gui is not None:

  1269.             gCarla.gui.BufferSizeChangedCallback.emit(value1)

  1270.         return

  1271. 

  1272.     if action == ENGINE_CALLBACK_SAMPLE_RATE_CHANGED:

  1273.         gCarla.sampleRate = value1

  1274.         if gCarla.gui is not None:

  1275.             gCarla.gui.SampleRateChangedCallback.emit(value3)

  1276.         return

  1277. 

  1278.     if gCarla.gui is None:

  1279.         print("WARNING: Got engine callback but UI is not ready : ", pluginId, value1, value2, value3, valueStr)

  1280.         return

  1281. 

  1282.     valueStr = charPtrToString(valueStr)

  1283. 

  1284.     if action == ENGINE_CALLBACK_DEBUG:

  1285.         gCarla.gui.DebugCallback.emit(pluginId, value1, value2, value3, valueStr)

  1286.     elif action == ENGINE_CALLBACK_PLUGIN_ADDED:

  1287.         gCarla.gui.PluginAddedCallback.emit(pluginId, valueStr)

  1288.     elif action == ENGINE_CALLBACK_PLUGIN_REMOVED:

  1289.         gCarla.gui.PluginRemovedCallback.emit(pluginId)

  1290.     elif action == ENGINE_CALLBACK_PLUGIN_RENAMED:

  1291.         gCarla.gui.PluginRenamedCallback.emit(pluginId, valueStr)

  1292.     elif action == ENGINE_CALLBACK_PLUGIN_UNAVAILABLE:

  1293.         gCarla.gui.PluginUnavailableCallback.emit(pluginId, valueStr)

  1294.     elif action == ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED:

  1295.         gCarla.gui.ParameterValueChangedCallback.emit(pluginId, value1, value3)

  1296.     elif action == ENGINE_CALLBACK_PARAMETER_DEFAULT_CHANGED:

  1297.         gCarla.gui.ParameterDefaultChangedCallback.emit(pluginId, value1, value3)

  1298.     elif action == ENGINE_CALLBACK_PARAMETER_MIDI_CC_CHANGED:

  1299.         gCarla.gui.ParameterMidiCcChangedCallback.emit(pluginId, value1, value2)

  1300.     elif action == ENGINE_CALLBACK_PARAMETER_MIDI_CHANNEL_CHANGED:

  1301.         gCarla.gui.ParameterMidiChannelChangedCallback.emit(pluginId, value1, value2)

  1302.     elif action == ENGINE_CALLBACK_PROGRAM_CHANGED:

  1303.         gCarla.gui.ProgramChangedCallback.emit(pluginId, value1)

  1304.     elif action == ENGINE_CALLBACK_MIDI_PROGRAM_CHANGED:

  1305.         gCarla.gui.MidiProgramChangedCallback.emit(pluginId, value1)

  1306.     elif action == ENGINE_CALLBACK_OPTION_CHANGED:

  1307.         gCarla.gui.OptionChangedCallback.emit(pluginId, value1, bool(value2))

  1308.     elif action == ENGINE_CALLBACK_UI_STATE_CHANGED:

  1309.         gCarla.gui.UiStateChangedCallback.emit(pluginId, value1)

  1310.     elif action == ENGINE_CALLBACK_NOTE_ON:

  1311.         gCarla.gui.NoteOnCallback.emit(pluginId, value1, value2, int(value3))

  1312.     elif action == ENGINE_CALLBACK_NOTE_OFF:

  1313.         gCarla.gui.NoteOffCallback.emit(pluginId, value1, value2)

  1314.     elif action == ENGINE_CALLBACK_UPDATE:

  1315.         gCarla.gui.UpdateCallback.emit(pluginId)

  1316.     elif action == ENGINE_CALLBACK_RELOAD_INFO:

  1317.         gCarla.gui.ReloadInfoCallback.emit(pluginId)

  1318.     elif action == ENGINE_CALLBACK_RELOAD_PARAMETERS:

  1319.         gCarla.gui.ReloadParametersCallback.emit(pluginId)

  1320.     elif action == ENGINE_CALLBACK_RELOAD_PROGRAMS:

  1321.         gCarla.gui.ReloadProgramsCallback.emit(pluginId)

  1322.     elif action == ENGINE_CALLBACK_RELOAD_ALL:

  1323.         gCarla.gui.ReloadAllCallback.emit(pluginId)

  1324.     elif action == ENGINE_CALLBACK_PATCHBAY_CLIENT_ADDED:

  1325.         gCarla.gui.PatchbayClientAddedCallback.emit(pluginId, value1, value2, valueStr)

  1326.     elif action == ENGINE_CALLBACK_PATCHBAY_CLIENT_REMOVED:

  1327.         gCarla.gui.PatchbayClientRemovedCallback.emit(pluginId)

  1328.     elif action == ENGINE_CALLBACK_PATCHBAY_CLIENT_RENAMED:

  1329.         gCarla.gui.PatchbayClientRenamedCallback.emit(pluginId, valueStr)

  1330.     elif action == ENGINE_CALLBACK_PATCHBAY_CLIENT_DATA_CHANGED:

  1331.         gCarla.gui.PatchbayClientDataChangedCallback.emit(pluginId, value1, value2)

  1332.     elif action == ENGINE_CALLBACK_PATCHBAY_PORT_ADDED:

  1333.         gCarla.gui.PatchbayPortAddedCallback.emit(pluginId, value1, value2, valueStr)

  1334.     elif action == ENGINE_CALLBACK_PATCHBAY_PORT_REMOVED:

  1335.         gCarla.gui.PatchbayPortRemovedCallback.emit(pluginId, value1)

  1336.     elif action == ENGINE_CALLBACK_PATCHBAY_PORT_RENAMED:

  1337.         gCarla.gui.PatchbayPortRenamedCallback.emit(pluginId, value1, valueStr)

  1338.     elif action == ENGINE_CALLBACK_PATCHBAY_CONNECTION_ADDED:

  1339.         gOut, pOut, gIn, pIn = [int(i) for i in valueStr.split(":")]

  1340.         gCarla.gui.PatchbayConnectionAddedCallback.emit(pluginId, gOut, pOut, gIn, pIn)

  1341.     elif action == ENGINE_CALLBACK_PATCHBAY_CONNECTION_REMOVED:

  1342.         gCarla.gui.PatchbayConnectionRemovedCallback.emit(pluginId, value1, value2)

  1343.     elif action == ENGINE_CALLBACK_ENGINE_STARTED:

  1344.         gCarla.gui.EngineStartedCallback.emit(value1, value2, valueStr)

  1345.     elif action == ENGINE_CALLBACK_ENGINE_STOPPED:

  1346.         gCarla.gui.killTimers()

  1347.         gCarla.gui.EngineStoppedCallback.emit()

  1348.     elif action == ENGINE_CALLBACK_IDLE:

  1349.         QApplication.instance().processEvents()

  1350.     elif action == ENGINE_CALLBACK_INFO:

  1351.         gCarla.gui.InfoCallback.emit(valueStr)

  1352.     elif action == ENGINE_CALLBACK_ERROR:

  1353.         gCarla.gui.ErrorCallback.emit(valueStr)

  1354.     elif action == ENGINE_CALLBACK_QUIT:

  1355.         gCarla.gui.QuitCallback.emit()

  1356. 

  1357. # ------------------------------------------------------------------------------------------------------------

  1358. # File callback

  1359. 

  1360. def fileCallback(ptr, action, isDir, title, filter):

  1361.     if gCarla.gui is None:

  1362.         return None

  1363. 

  1364.     ret = ""

  1365. 

  1366.     if action == FILE_CALLBACK_DEBUG:

  1367.         pass

  1368.     elif action == FILE_CALLBACK_OPEN:

  1369.         ret = QFileDialog.getOpenFileName(gCarla.gui, charPtrToString(title), "", charPtrToString(filter) ) #, QFileDialog.ShowDirsOnly if isDir else 0x0)

  1370.     elif action == FILE_CALLBACK_SAVE:

  1371.         ret = QFileDialog.getSaveFileName(gCarla.gui, charPtrToString(title), "", charPtrToString(filter), QFileDialog.ShowDirsOnly if isDir else 0x0)

  1372. 

  1373.     if config_UseQt5:

  1374.         ret = ret[0]

  1375.     if not ret:

  1376.         return None

  1377. 

  1378.     gCarla.gui._fileRet = c_char_p(ret.encode("utf-8"))

  1379.     retval = cast(byref(gCarla.gui._fileRet), POINTER(c_uintptr))

  1380.     return retval.contents.value

  1381. 

  1382. # ------------------------------------------------------------------------------------------------------------

  1383. # Init host

  1384. 

  1385. def initHost(initName, libPrefix = None, failError = True):

  1386.     # --------------------------------------------------------------------------------------------------------

  1387.     # Set Carla library name

  1388. 

  1389.     libname = "libcarla_"

  1390. 

  1391.     if gCarla.isControl:

  1392.         libname += "control2"

  1393.     else:

  1394.         libname += "standalone2"

  1395. 

  1396.     if WINDOWS:

  1397.         libname += ".dll"

  1398.     elif MACOS:

  1399.         libname += ".dylib"

  1400.     else:

  1401.         libname += ".so"

  1402. 

  1403.     # --------------------------------------------------------------------------------------------------------

  1404.     # Set binary dir

  1405. 

  1406.     CWDl = CWD.lower()

  1407. 

  1408.     # standalone, installed system-wide linux

  1409.     if libPrefix is not None:

  1410.         gCarla.pathBinaries  = os.path.join(libPrefix, "lib", "carla")

  1411.         gCarla.pathResources = os.path.join(libPrefix, "share", "carla", "resources")

  1412. 

  1413.     # standalone, local source

  1414.     elif CWDl.endswith("source"):

  1415.         gCarla.pathBinaries  = os.path.abspath(os.path.join(CWD, "..", "bin"))

  1416.         gCarla.pathResources = os.path.join(gCarla.pathBinaries, "resources")

  1417. 

  1418.     # plugin

  1419.     elif CWDl.endswith("resources"):

  1420.         # installed system-wide linux

  1421.         if CWDl.endswith("/share/carla/resources"):

  1422.             gCarla.pathBinaries  = os.path.abspath(os.path.join(CWD, "..", "..", "..", "lib", "carla"))

  1423.             gCarla.pathResources = CWD

  1424. 

  1425.         # local source

  1426.         elif CWDl.endswith("native-plugins%sresources" % os.sep):

  1427.             gCarla.pathBinaries  = os.path.abspath(os.path.join(CWD, "..", "..", "..", "..", "bin"))

  1428.             gCarla.pathResources = CWD

  1429. 

  1430.         # other

  1431.         else:

  1432.             gCarla.pathBinaries  = os.path.abspath(os.path.join(CWD, ".."))

  1433.             gCarla.pathResources = CWD

  1434. 

  1435.     # everything else

  1436.     else:

  1437.         gCarla.pathBinaries  = CWD

  1438.         gCarla.pathResources = os.path.join(gCarla.pathBinaries, "resources")

  1439. 

  1440.     # --------------------------------------------------------------------------------------------------------

  1441.     # Fail if binary dir is not found

  1442. 

  1443.     if not os.path.exists(gCarla.pathBinaries):

  1444.         if failError:

  1445.             QMessageBox.critical(None, "Error", "Failed to find the carla binaries, cannot continue")

  1446.             sys.exit(1)

  1447.         return

  1448. 

  1449.     # --------------------------------------------------------------------------------------------------------

  1450.     # Print info

  1451. 

  1452.     print("Carla %s started, status:" % VERSION)

  1453.     print("  Python version: %s" % sys.version.split(" ",1)[0])

  1454.     print("  Qt version:     %s" % qVersion())

  1455.     print("  PyQt version:   %s" % PYQT_VERSION_STR)

  1456.     print("  Binary dir:     %s" % gCarla.pathBinaries)

  1457.     print("  Resources dir:  %s" % gCarla.pathResources)

  1458. 

  1459.     # --------------------------------------------------------------------------------------------------------

  1460.     # Init host

  1461. 

  1462.     if gCarla.host is None:

  1463.         #try:

  1464.             gCarla.host = CarlaHostDLL(os.path.join(gCarla.pathBinaries, libname))

  1465.         #except:

  1466.             #print("hmmmm...")

  1467.             #return

  1468. 

  1469.     gCarla.host.set_engine_callback(engineCallback)

  1470.     gCarla.host.set_file_callback(fileCallback)

  1471. 

  1472.     # If it's a plugin the paths are already set

  1473.     if not gCarla.isPlugin:

  1474.         gCarla.host.set_engine_option(ENGINE_OPTION_PATH_BINARIES,  0, gCarla.pathBinaries)

  1475.         gCarla.host.set_engine_option(ENGINE_OPTION_PATH_RESOURCES, 0, gCarla.pathResources)

  1476. 

  1477.         if not gCarla.isControl:

  1478.             gCarla.host.set_engine_option(ENGINE_OPTION_NSM_INIT, os.getpid(), initName)

  1479. 

  1480.     return gCarla.host

  1481. 

  1482. # ------------------------------------------------------------------------------------------------------------