def system_exclusive(self, data):
"""
data: list of values in range(128)
"""
sysex_len = writeVar(len(data) + 1)
self.event_slice(
chr(SYSTEM_EXCLUSIVE) + sysex_len + data + chr(END_OFF_EXCLUSIVE))
def end_of_track(self):
"""
Writes the track to the buffer.
"""
raw = self.raw_out
raw.writeSlice(TRACK_HEADER)
track_data = self._current_track_buffer.getvalue()
# wee need to know size of track data.
eot_slice = writeVar(self.rel_time()) + fromBytes([META_EVENT, END_OF_TRACK, 0])
raw.writeBew(len(track_data)+len(eot_slice), 4)
# then write
raw.writeSlice(track_data)
raw.writeSlice(eot_slice)
def meta_slice(self, meta_type, data_slice):
"Writes a meta event"
slc = fromBytes([META_EVENT, meta_type]) + \
writeVar(len(data_slice)) + data_slice
self.event_slice(slc)
def writeVarLen(self, value):
"Writes a variable length word to the file"
var = self.writeSlice(writeVar(value))