genmidi: Add a2i-sbi conversion script.

Convenience script to convert a2i files to the more convenient
SBI format.

lumps/genmidi/a2i-to-sbi

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2011, 2012
+# Contributors to the Freedoom project.  All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#  * Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#  * Neither the name of the freedoom project nor the names of its
+#    contributors may be used to endorse or promote products derived from
+#    this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+import a2i_file
+import sbi_file
+import sys
+
+if len(sys.argv) != 3:
+	print >> sys.stderr, "Usage: %s <input filename> <output filename>" \
+	                     % sys.argv[0]
+	sys.exit(-1)
+
+data = a2i_file.read(sys.argv[1])
+sbi_file.write(sys.argv[2], data)
+

lumps/genmidi/sbi_file.py

@@ -70,6 +70,18 @@ def read(filename):
 
 	return result
 
+def write(filename, data):
+	f = open(filename, 'w')
+
+	f.write(struct.pack("4s32s", HEADER_VALUE, data["name"]))
+
+	for field in FIELDS:
+		f.write(struct.pack("B", data[field]))
+	for x in range(16 - len(FIELDS)):
+		f.write(struct.pack("B", 0))
+
+	f.close()
+
 if __name__ == "__main__":
 	for filename in sys.argv[1:]:
 		print filename