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#!/usr/bin/env python
#This python module is part of the Jam2Jam XO Activity, March, 2010
#
#Copyright (C) 2010 Thorin Kerr & Andrew Brown
#
#This program is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2 of the License, or any
#later version.
#
#This program is distributed in the hope that it will be useful, but
#WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import csnd
from heapq import heappush, heappop
from CsHelpers import *
class Csound:
"precompiles a csound object"
def __init__(self):
self.csound = csnd.CppSound()
self.csound.setPythonMessageCallback()
self.csound.PreCompile()
def __repr__(self):
return "Precompiled Csound object"
class Sched( object ):
queue = []
time = 0
def __init__(self, kr=172.265625, tempo=60):
self.kr = kr
self.tempo = 60
def _increment(self):
"return the time increment value"
return (1.0 / self.kr) * (60.0 / self.tempo)
def poll(self, inc):
"increments the time value, and evaluates items scheduled in the past"
self.time += (1.0 / self.kr) * (self.tempo / 60.0) #increment the time. The question is... should I let Csound store the time. No GIL that way. hmmm.
for i in self.queue:
if self.time >= i[0]:
obj = heappop(self.queue)
(obj[1] (*obj[2]))
else: break
def schedEvent(self, time, func, *args):
heappush(self.queue, (time, func, args))
def getTime(self):
if self:
return self.queue[0][0]
else:
return False
def getFunc(self):
if len(self) == 0:
return False
else:
return self.queue[0][1]
def getArgs(self):
if len(self) == 0:
return False
else:
return self.queue[0][2]
def __len__(self):
return len(self.queue)
def __add__(self, integer):
"returns now + time value"
return self.now() + integer
def __rshift__(self, beat):
"returns the next nth beat time"
return ceil(self.now()) + beat
def __div__(self, barlength):
"where barlength is the number of beats in a bar, returns a tuple of the current time represented in the form (bar no. , beat no)"
return divmod(self.now(), barlength)
def now(self):
return self.time
def reset(self, reset=0):
self.time = reset
class CsoundChan:
"an empty container for Csound channel data"
#type is either Audio, Control, or String
#Direction = INput or Output
#subType = interger, linear or exponential
#default = default value
#minval = suggested minimum
#maxval == suggested maximum
pass
def channels(csound):
"returns a list of Input and output software bus channels"
Chanlist = csnd.CsoundChannelList(csound)
result = []
for ndx in range(Chanlist.Count()):
ch = CsoundChan()
ch.name = Chanlist.Name(ndx)
if Chanlist.IsAudioChannel(ndx):
ch.type = "Audio"
elif Chanlist.IsControlChannel(ndx):
ch.type = "Control"
elif Chanlist.IsStringChannel(ndx):
ch.type = "String"
else: pass
if Chanlist.IsInputChannel(ndx) and Chanlist.IsOutputChannel(ndx):
ch.direction = "bidirectional"
elif Chanlist.IsInputChannel(ndx):
ch.direction = "input"
elif Chanlist.IsOutputChannel(ndx):
ch.direction = "output"
else: pass
if Chanlist.SubType(ndx) > 0:
tmp = ['integer', 'linear', 'exponential']
ch.subtype = (tmp[Chanlist.SubType(ndx) - 1])
ch.default = (Chanlist.DefaultValue(ndx))
ch.minval = (Chanlist.MinValue(ndx))
ch.maxval = (Chanlist.MaxValue(ndx))
result.append(ch)
Chanlist.Clear()
return result
class CsoundPerformer:
def pollScheduler(self, schedObj):
st = schedObj.getTime()
if st:
t = self.perfTime()
if t >= st:
obj = heapq.heappop(schedObj.queue)
(obj[1] (*obj[2]))
def __init__(self, metro, orcObj, *cs):
"SchedObj is a Csound timer instance, orcObJ is a CsOrcConstructor Object"
#self.Timer = csnd.CsoundTimer()
self.metro = metro
#self.schedObj = schedObj
self.orcObj = orcObj
if len(cs) == 0:
cs = Csound()
self.csound = Csound.csound
else: self.csound = cs[0]
self.csound.setOrchestra(orcObj.exportOrc())
self.csound.setScore(orcObj.sco)
if platform == "Sugar":
self.csound.setCommand("csound -b256 -B2048 -+rtaudio=alsa -odac --expression-opt --sched=1 -d -m0 /tmp/tmp.orc /tmp/tmp.sco")
else:
self.csound.setCommand("csound -b256 -B2048 -odac --expression-opt -d -m0 /tmp/tmp.orc /tmp/tmp.sco")
self.csound.exportForPerformance()
self.csound.compile()
self.Channels = channels(self.csound)
self.perf = csnd.CsoundPerformanceThread(self.csound)
self.perf.Play()
self.perf.SetProcessCallback(self.metro.poll, 0)
def perfTime(self):
return self.metro.now()
#return self.Timer.GetRealTime()
def Stop(self):
self.perf.Stop()
#self.perf.Join()
self.csound.Cleanup()
def setChannelValue(self, channame, value):
self.csound.SetChannel(channame, value)
def getChannelValue(self, channame):
return self.csound.GetChannel(channame)
def getChannelList(self):
return csnd.CsoundChannelList(self.csound)
def getChannelNames(self):
chlst = self.getChannelList()
return [chlst.Name(ch) for ch in range(chlst.Count())]
def playParams(self, ins, start, dur, *params):
"send score message to Csound with parameter values"
if start < 0: start = 0
s = ' '.join(map(str, (['i', ins, start, dur] + [str(n) for n in params])))
self.perf.InputMessage(s)
def playNote(self, ins, note):
"send score message to Csound using a note object"
start = note[0]
dur = note[1]
params = note[2:]
self.perf.InputMessage(' '.join(['i', str(ins),str(start),str(dur)]+[str(n) for n in params]))
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