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e47b69a064
Tweak the code used to build the GENMIDI Lump so that it properly supports Python 3 for build. Tested use cases were: * Normal build * a2i-to-sbi script to convert AdTrack2 instruments to SBI format * dumpgenmidi script to dump the instruments from a GENMIDI lump. * Running genmidi.py, sbi_file.py, a2i_file.py standalone to print the contents of files in their respective formats.
87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (c) 2011, 2012
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# Contributors to the Freedoom project. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the freedoom project nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# ----------------------------------------------------------------------
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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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