def writeMidiTrack(self, out):
""" Create/write the MIDI track.
We convert timing offsets to midi-deltas.
"""
tr = self.miditrk
""" If the -1 flag is set we need to add a terminate
to the end of each track. This is done to make looping
software like seq24 happy. We do this by truncating all
data in the file past the current tick pointer and inserting
an all-notes-off at that position.
"""
if gbl.endsync and self.channel>=0:
eof = gbl.tickOffset
for offset in tr.keys():
if offset > eof:
del tr[offset]
self.addToTrack(eof, chr(0xb0 | self.channel) + chr(0x7b) + chr(0))
""" To every MIDI track we generate we add (if the -0 flag
was set) an on/off beep at offset 0. This makes for
easier sync in multi-tracks.
"""
if gbl.synctick and self.channel >= 0:
t,v = syncTone
self.addToTrack(0, chr(0x90 | self.channel) + chr(t) + chr(v) )
self.addToTrack(1, chr(0x90 | self.channel) + chr(t) + chr(0) )
if gbl.debug:
ttl = 0
lg=1
for t in tr:
a=len(tr[t])
if a > lg:
lg = a
ttl += a
print "Unique ts: %s; Ttl events %s; Average ev/ts %.2f" % \
(len(tr), ttl, float(ttl)/len(tr) )
last = 0
# Convert all events to MIDI deltas and store in
# the track array/list
tdata = [] # empty track container
lastSts = None # Running status tracker
for a in sorted(tr.keys()):
delta = a-last
if not tr[a]:
continue # this skips the delta offset update!
for d in tr[a]:
""" Running status check. For each packet compare
the first byte with the first byte of the previous
packet. If it is can be converted to running status
we strip out byte 0. Note that valid running status
byte are 0x80..0xef. 0xfx are system messages
and are note suitable for running status.
"""
if len(d) > 1:
if d[0] == lastSts:
d=d[1:]
else:
lastSts = d[0]
s=ord(lastSts)
if s < 0x80 or s > 0xef or not gbl.runningStatus:
lastSts = None
tdata.extend( [ intToVarNumber(delta) , d ] )
delta = 0
last = a
# Add an EOF to the track (included in total track size)
tdata.append( intToVarNumber(0))
tdata.append( chr(0xff) + chr(0x2f) + chr(0x00) )
tdata = ''.join(tdata)
totsize = len(tdata)
out.write("MTrk")
out.write(intToLong(totsize))
out.write( tdata )
def mkHeader(count, tempo, Mtype):
return "MThd" + intToLong(6) + intToWord(Mtype) + intToWord(count) + intToWord(tempo)
def mkHeader(count, tempo, Mtype):
return packBytes("MThd", intToLong(6), intToWord(Mtype), intToWord(count), intToWord(tempo))
def mkHeader(count, tempo, Mtype):
return packBytes("MThd", intToLong(6), intToWord(Mtype), intToWord(count), intToWord(tempo))
def writeMidiTrack(self, out):
""" Create/write the MIDI track.
We convert timing offsets to midi-deltas.
"""
tr=self.miditrk
""" To every MIDI track we generate we add (if the -0 flag
was set) an on/off beep at offset 0. This makes for
easier sync in multi-tracks.
"""
if gbl.synctick and self.channel >= 0:
self.addToTrack(0, chr(0x90 | self.channel) + chr(80) + chr(90) )
self.addToTrack(1, chr(0x90 | self.channel) + chr(80) + chr(0) )
if gbl.debug:
ttl = 0
lg=1
for t in tr:
a=len(tr[t])
if a > lg:
lg = a
ttl += a
print "Unique ts: %s; Ttl events %s; Average ev/ts %.2f" % \
(len(tr), ttl, float(ttl)/len(tr) )
last = 0
# Convert all events to MIDI deltas and store in
# the track array/list
tdata=[] # empty track container
lastSts=None # Running status tracker
for a in sorted(tr.keys()):
delta = a-last
for d in tr[a]:
""" Running status check. For each packet compare
the first byte with the first byte of the previous
packet. If it is can be converted to running status
we strip out byte 0. Note that valid running status
byte are 0x80..0xef. 0xfx are system messages
and are note suitable for running status.
"""
if len(d) > 1:
if d[0] == lastSts:
d=d[1:]
else:
lastSts = d[0]
s=ord(lastSts)
if s < 0x80 or s > 0xef or not gbl.runningStatus:
lastSts = None
tdata.extend( [ intToVarNumber(delta) , d ] )
delta = 0
last = a
# Add an EOF to the track (included in total track size)
tdata.append( intToVarNumber(0))
tdata.append( chr(0xff) + chr(0x2f) + chr(0x00) )
tdata = ''.join(tdata)
totsize = len(tdata)
out.write("MTrk")
out.write(intToLong(totsize))
out.write( tdata )
