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70 lines
1.7 KiB
Python
70 lines
1.7 KiB
Python
# -*- coding: ISO-8859-1 -*-
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# standard library imports
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import sys
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from types import StringType
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from struct import unpack
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from cStringIO import StringIO
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# custom import
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from DataTypeConverters import writeBew, writeVar, fromBytes
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class RawOutstreamFile:
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"""
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Writes a midi file to disk.
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"""
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def __init__(self, outfile=''):
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self.buffer = StringIO()
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self.outfile = outfile
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# native data reading functions
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def writeSlice(self, str_slice):
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"Writes the next text slice to the raw data"
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self.buffer.write(str_slice)
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def writeBew(self, value, length=1):
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"Writes a value to the file as big endian word"
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self.writeSlice(writeBew(value, length))
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def writeVarLen(self, value):
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"Writes a variable length word to the file"
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var = self.writeSlice(writeVar(value))
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def write(self):
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"Writes to disc"
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if self.outfile:
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if isinstance(self.outfile, StringType):
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outfile = open(self.outfile, 'wb')
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outfile.write(self.getvalue())
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outfile.close()
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else:
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self.outfile.write(self.getvalue())
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else:
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sys.stdout.write(self.getvalue())
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def getvalue(self):
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return self.buffer.getvalue()
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if __name__ == '__main__':
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out_file = 'test/midifiles/midiout.mid'
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out_file = ''
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rawOut = RawOutstreamFile(out_file)
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rawOut.writeSlice('MThd')
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rawOut.writeBew(6, 4)
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rawOut.writeBew(1, 2)
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rawOut.writeBew(2, 2)
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rawOut.writeBew(15360, 2)
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rawOut.write()
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