rough analyzer

Author: ladyada

Teddy_Ruxpin/ruxalyzer.py

@@ -0,0 +1,76 @@
+#!/usr/local/bin/python3
+
+import struct
+
+FILENAME = "Intro.bin"
+
+storyfile = open(FILENAME, "rb")
+
+SNXROM = {}
+
+# check for magic bytes
+SNXROM['SNXROM'] = storyfile.read(12).decode('utf-16')
+if SNXROM['SNXROM'] != 'SNXROM':
+    raise RuntimeError("Didn't find SNXROM magic bytes")
+
+print(SNXROM['SNXROM'], "found")
+
+# read and toss next 28 bytes all 0xFF
+storyfile.read(28)
+# find 0x400 bytes
+if 0x400 != struct.unpack('I', storyfile.read(4))[0]:
+    raise RuntimeError("Didn't find 0x400 magic bytes")
+
+SNXROM['assetTableLengthWords'] = struct.unpack('I', storyfile.read(4))[0]
+print("Asset table length (words):", SNXROM['assetTableLengthWords'], "& bytes:", SNXROM['assetTableLengthWords'] * 4)
+
+# read and toss next 464 bytes all 0xFF
+storyfile.read(464)
+
+# NOTE: the pointers are in byte offsets not words!
+print("Looking for asset table pointers at", hex(storyfile.tell()))
+assetTablePointers = [0] * SNXROM['assetTableLengthWords']
+for i in range(SNXROM['assetTableLengthWords']):
+    assetTablePointers[i] = struct.unpack('I', storyfile.read(4))[0]
+print("Asset table pointers:", [hex(i) for i in assetTablePointers])
+
+SNXROM['audioOffset'] = assetTablePointers[-1]
+
+# verify audio offset
+print("Looking for audio at", hex(SNXROM['audioOffset']))
+storyfile.seek(SNXROM['audioOffset'])
+if "AU" != storyfile.read(2).decode('utf-8'):
+    raise RuntimeError("Didn't find AU at beginning of audio")
+print("Found beginning of audio")
+"""
+SNXROM['metaOffset'] = struct.unpack('I', storyfile.read(4))[0]
+SNXROM['leftEyeOffset'] = struct.unpack('I', storyfile.read(4))[0]
+SNXROM['rightEyeOffset'] = struct.unpack('I', storyfile.read(4))[0]
+
+
+print("Metadata offset: %d bytes, address 0x%0X" % (SNXROM['metaOffset'], SNXROM['metaOffset']))
+print("Left Eye offset: %d bytes, address 0x%0X" % (SNXROM['leftEyeOffset'], SNXROM['leftEyeOffset']))
+print("Right Eye offset: %d bytes, address 0x%0X" % (SNXROM['rightEyeOffset'], SNXROM['rightEyeOffset']))
+print("Audio data offset: %d bytes, address 0x%0X" % (SNXROM['audioOffset'], SNXROM['audioOffset']))
+
+print(storyfile.tell())
+
+# Go to the metadata table
+storyfile.seek(SNXROM['metaOffset'])
+
+if 0x0000 != struct.unpack('h', storyfile.read(2))[0]:
+    raise RuntimeError("Didn't find 0x0000 magic bytes")
+SNXROM['storyId'] = struct.unpack('h', storyfile.read(2))[0]
+SNXROM['numberOfEyeAnimations'] = struct.unpack('h', storyfile.read(2))[0]
+SNXROM['numberOfEyeBitmaps'] = struct.unpack('h', storyfile.read(2))[0]
+SNXROM['numberOfVideoSequences'] = struct.unpack('h', storyfile.read(2))[0]
+SNXROM['numberOfAudioBlocks'] = struct.unpack('h', storyfile.read(2))[0]
+print("Story ID: ", SNXROM['storyId'])
+print("Eye animations:", SNXROM['numberOfEyeAnimations'])
+print("Eye bitmaps:", SNXROM['numberOfEyeBitmaps'])
+print("Video seqs:", SNXROM['numberOfVideoSequences'])
+print("Audio blocks:", SNXROM['numberOfAudioBlocks'])
+
+SNXROM['ROMfilesize'] = struct.unpack('i', storyfile.read(4))[0]
+print(SNXROM['ROMfilesize'])
+"""