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#!/usr/bin/env python
# coding: utf-8
import sys, struct, time, os
"""
No surprises with this format, it's stored exactly the same way as the
embedded MIDI data within IT files, namely as an array of 153 entries of
32 bytes apiece, each terminated with \0, in the same order as presented
in Impulse Tracker's MIDI Output Configuration screen:
MIDI Start
MIDI Stop
MIDI Tick
Note On
Note Off
Change Volume
Change Pan
Bank Select
Program Change
Macro Setup
SF0 -> SFF
Z80 -> ZFF
Every line should be present, for a total expected file size of
(9 + 16 + 128) * 32 = 4896 bytes.
"""
if len(sys.argv) != 2 or sys.argv[1] in ["--help", "-h"]:
print("usage: %s /path/to/itmidi.cfg >> ~/.schism/config" % sys.argv[0])
sys.exit(0)
def warning(s):
sys.stderr.write("%s: %s\n" % (sys.argv[1], s))
def fatal(s):
warning(s)
sys.exit(5)
itmidi = open(sys.argv[1], "rb")
def readvalue(k):
try:
e = itmidi.read(32)
if len(e) != 32:
fatal("file is truncated, should be 4896 bytes")
e = e.decode("ascii", "replace").split("\0")[0]
e.encode("ascii") # test
except IOError:
fatal("read error")
except UnicodeError:
warning("garbage data encountered for %s" % k.replace("_", " "))
e = ""
return e
midiconfig = [(k, readvalue(k)) for k in
["start", "stop", "tick", "note_on", "note_off", "set_volume", "set_panning", "set_bank", "set_program"]
+ ["SF%X" % n for n in range(16)]
+ ["Z%02X" % n for n in range(128, 256)]]
try:
if itmidi.read(1):
warning("warning: file has trailing data")
except IOError:
# Don't care anymore.
pass
print("# MIDI configuration imported from Impulse Tracker on %s" % time.ctime())
print("")
print("[MIDI]")
for (k, v) in midiconfig:
print("%s=%s" % (k, v))
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