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.
61 lines
1.3 KiB
Python
61 lines
1.3 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: BSD-3-Clause
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#
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# Module to load Creative SBI OPL instrument files.
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#
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import struct
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import sys
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HEADER_VALUE = "SBI\x1a"
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FIELDS = [
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"m_am_vibrato_eg",
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"c_am_vibrato_eg",
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"m_ksl_volume",
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"c_ksl_volume",
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"m_attack_decay",
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"c_attack_decay",
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"m_sustain_release",
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"c_sustain_release",
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"m_waveform",
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"c_waveform",
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"feedback_fm",
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]
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def read(filename):
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with open(filename, "rb") as f:
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data = f.read()
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header, name = struct.unpack("4s32s", data[0:36])
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header = header.decode("ascii")
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if header != HEADER_VALUE:
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raise Exception("Invalid header for SBI file!")
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instr_data = data[36:]
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result = {"name": name.decode("ascii").rstrip("\0")}
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for i in range(len(FIELDS)):
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result[FIELDS[i]], = struct.unpack("B", instr_data[i : i + 1])
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return result
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def write(filename, data):
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with open(filename, "wb") as f:
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f.write(struct.pack("4s", HEADER_VALUE.encode("ascii")))
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f.write(struct.pack("32s", data["name"].encode("ascii")))
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for field in FIELDS:
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f.write(struct.pack("B", data[field]))
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for x in range(16 - len(FIELDS)):
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f.write(struct.pack("B", 0))
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if __name__ == "__main__":
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for filename in sys.argv[1:]:
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print(filename)
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print(read(filename))
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