def createChannel(csound, channelName):
"Creates a Csound Channel and returns a CsoundMYFLTArray wrapper object"
chn = csnd6.CsoundMYFLTArray(1)
csound.GetChannelPtr(
chn.GetPtr(), channelName,
csnd6.CSOUND_CONTROL_CHANNEL | csnd6.CSOUND_INPUT_CHANNEL)
return chn
def fill_table(self, tabnum, arr):
'''Create or fill a Csound f-table with the values passed in the arr
variable. This variable can be a python list or a numpy array. Having ctypes
installed will make this function significantly faster'''
if type(arr) != np.ndarray and type(arr) != list and type(
arr) != tuple:
raise TypeError("Argument is not array, list or tuple")
if type(arr) == np.ndarray and arr.ndim > 1:
raise ValueError("Only one dimensional arrays are valid")
if self._client_addr:
data = ', '.join(map(str, arr))
data = 'gitemp ftgen %i, 0, %i, -2, ' % (tabnum, len(arr)) + data
self.send_code(data)
return
if use_ctypes:
tbl = csnd6.CsoundMYFLTArray()
# FIXME what about guard point?
tblSize = self._cs.GetTable(tbl.GetPtr(),
tabnum) # Needs + 1 due to guard point
if tblSize <= 0:
self._debug_print("Creating table ", tabnum)
self.make_table(tabnum, len(arr), 2, 0)
tblSize = self._cs.GetTable(tbl.GetPtr(), tabnum)
elif not tblSize == len(arr):
self._debug_print("Resizing table", tabnum, "from", tblSize,
"to", len(arr))
self.make_table(tabnum, len(arr), 2, 0)
tblSize = self._cs.GetTable(tbl.GetPtr(), tabnum)
if self._myfltsize == 8:
myflt = ctypes.c_double
else:
myflt = ctypes.c_float
cs_ftable = ctypes.ARRAY(myflt, tblSize).from_address(
tbl.GetPtr(0).__long__())
if type(arr) == np.ndarray:
src_array = arr.astype(np.float64).ctypes.data_as(
ctypes.POINTER(myflt))
else:
fltarray = myflt * len(arr)
src_array = fltarray(*arr)
ctypes.memmove(cs_ftable, src_array, len(arr) * self._myfltsize)
else:
data = ', '.join(map(str, arr))
data = 'gitemp ftgen %i, 0, %i, -2, ' % (tabnum, len(arr)) + data
self.send_code(data)
def createChannel(csound, channelName):
chn = csnd6.CsoundMYFLTArray(1)
csound.GetChannelPtr(
chn.GetPtr(), channelName,
csnd6.CSOUND_CONTROL_CHANNEL | csnd6.CSOUND_INPUT_CHANNEL)
return chn
aout moogladder aout, 2000, 0.25
outs aout, aout
endin"""
c = csnd6.Csound() # create an instance of Csound
c.SetOption("-odac") # Set option for Csound
c.SetOption("-m7") # Set option for Csound
c.CompileOrc(orc) # Compile Orchestra from String
sco = "i1 0 60\n"
c.ReadScore(sco) # Read in Score generated from notes
c.Start() # When compiling from strings, this call is necessary before doing any performing
ampChannel = csnd6.CsoundMYFLTArray(1) # create a CsoundMYFLTArray of size 1
freqChannel = csnd6.CsoundMYFLTArray(1) # create a CsoundMYFLTArray of size 1
# the following calls store the Channel Pointer retreived from Csound into the
# CsoundMYFLTArray Objects
c.GetChannelPtr(ampChannel.GetPtr(), "amp",
csnd6.CSOUND_CONTROL_CHANNEL | csnd6.CSOUND_INPUT_CHANNEL)
c.GetChannelPtr(freqChannel.GetPtr(), "freq",
csnd6.CSOUND_CONTROL_CHANNEL | csnd6.CSOUND_INPUT_CHANNEL)
amp = RandomLine(.4, .2)
freq = RandomLine(400, 80)
ampChannel.SetValue(0, amp.getValue()) # note we are now setting values on the CsoundMYFLTArray
freqChannel.SetValue(0, freq.getValue())
