77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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# ctcsoundSession.py:
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#
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# Copyright (C) 2016 Francois Pinot
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#
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# This code is free software; you can redistribute it
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# and/or modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This code is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this code; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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# 02111-1307 USA
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#
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import os
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import ctypes
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import ctcsound
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class CsoundSession(ctcsound.Csound):
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"""A class for running a csound session"""
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def __init__(self, csdFileName=None):
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"""Start a csound session, eventually loading a csd file"""
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ctcsound.Csound.__init__(self)
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self.pt = None
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if csdFileName and os.path.exists(csdFileName):
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self.csd = csdFileName
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self.startThread()
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else:
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self.csd = None
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def startThread(self):
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if self.compile_("csoundSession", self.csd) == 0:
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self.pt = ctcsound.CsoundPerformanceThread(self.cs)
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self.pt.play()
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def resetSession(self, csdFileName=None):
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"""Reset the current session, eventually loading a new csd file"""
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if csdFileName and os.path.exists(csdFileName):
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self.csd = csdFileName
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if self.csd:
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self.stopPerformance()
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self.startThread()
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def stopPerformance(self):
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"""Stop the current score performance if any"""
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if self.pt:
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if self.pt.status() == 0:
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self.pt.stop()
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self.pt.join()
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self.pt = None
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self.cleanup()
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def csdFileName(self):
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"""Return the loaded csd filename or None"""
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return self.csd
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def note(self, pfields, absp2mode=0):
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"""Send a score note to a csound instrument"""
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return self.pt.scoreEvent(absp2mode, 'i', pfields)
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def scoreEvent(self, eventType, pfields, absp2mode=False):
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"""Send a score event to csound"""
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self.pt.scoreEvent(absp2mode, eventType, pfields)
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def flushMessages(self):
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"""Wait until all pending messages are actually received by the performance thread"""
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if self.pt:
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self.pt.flushMessageQueue() |