mirror of
https://github.com/freedoom/freedoom.git
synced 2025-09-04 04:25:46 -04:00
6eef9be73a
Python 2 is very near end-of-life, and Python3-compatible changes to a few scripts introduced compatibility problems with 2.7 again. It went unnoticed for me since my system symlinks "python" to "python3", but it broke the build on systems where that symlink is still python2. At this point in time, I feel it is worth targetting modern Python and forgetting about 2.7.
76 lines
1.9 KiB
Python
76 lines
1.9 KiB
Python
#!/usr/bin/env python3
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
#
|
|
# Module to load OPL instrument files.
|
|
#
|
|
|
|
import os
|
|
import sys
|
|
import sbi_file
|
|
import a2i_file
|
|
|
|
# Check the specified instrument data is OPL2-compatible and does not
|
|
# use any OPL3 features. Returns an error message, or 'None' if data
|
|
# is valid.
|
|
|
|
|
|
def check_opl2(filename, data):
|
|
def opl2_warning(message):
|
|
print("%s: %s" % (filename, message), file=sys.stderr)
|
|
|
|
# CHA,B control stereo, but are ignored on OPL2, so it's no problem:
|
|
# if (data["feedback_fm"] & 0xf0) != 0:
|
|
# opl2_warning("Cannot use CHA,B,C,D: %02x" % data["feedback_fm"])
|
|
|
|
if data["m_waveform"] > 3:
|
|
opl2_warning(
|
|
"Modulator uses waveform %i: only 0-3 supported"
|
|
% data["m_waveform"]
|
|
)
|
|
if data["c_waveform"] > 3:
|
|
opl2_warning(
|
|
"Carrier uses waveform %i: only 0-3 supported" % data["c_waveform"]
|
|
)
|
|
|
|
|
|
def load_instrument(filename):
|
|
|
|
# As a hack, a literal dictionary of the values can be specified
|
|
# in place of a filename.
|
|
|
|
if isinstance(filename, dict):
|
|
return filename
|
|
|
|
filename = os.path.join("instruments", filename)
|
|
|
|
if filename.endswith(".a2i"):
|
|
result = a2i_file.read(filename)
|
|
elif filename.endswith(".sbi"):
|
|
result = sbi_file.read(filename)
|
|
else:
|
|
raise Exception("Unknown instrument file type: '%s'" % filename)
|
|
|
|
check_opl2(filename, result)
|
|
|
|
return result
|
|
|
|
|
|
class Instrument:
|
|
def __init__(self, file1, file2=None, off1=0, off2=0, note=None):
|
|
self.voice1 = load_instrument(file1)
|
|
|
|
if file2 is not None:
|
|
self.voice2 = load_instrument(file2)
|
|
else:
|
|
self.voice2 = None
|
|
|
|
self.fixed_note = note
|
|
self.offset1 = off1
|
|
self.offset2 = off2
|
|
|
|
|
|
NullInstrument = Instrument("dummy.sbi")
|
|
|
|
if __name__ == "__main__":
|
|
for filename in sys.argv[1:]:
|
|
Instrument(filename)
|