start conversion to Go

2026-08-06 23:53:40 +00:00 · 2026-04-15 12:43:39 -05:00
parent d2e568bd71
commit f07276b858
8 changed files with 223 additions and 0 deletions
@@ -0,0 +1,109 @@
+#UNFINISHED
+import os
+import argparse
+import struct
+from collections import namedtuple
+
+def is_valid_file(parser, arg):
+    if not os.path.exists(arg):
+        parser.error("The file %s does not exist!" % arg)
+    else:
+        return arg
+
+parser = argparse.ArgumentParser(description="Process JAK SBK files")
+
+
+parser.add_argument("-i", dest="filepath", required=True, 
+                    help="Input path to JAK SBK file", metavar="FILE",
+                    type=lambda x: is_valid_file(parser, x))
+
+args = parser.parse_args()
+
+filename = os.path.basename(args.filepath)
+
+name_length = 20
+sounds_start = 24
+sounds_length = 20
+
+#struct type            20s  I
+SBK = namedtuple('SBK','name soundCount')
+SBKStructString = "20sI"
+
+#struct type                16s  I               I
+Sound = namedtuple('Sound','name soundDataOffset soundDataSize')
+SoundStructString = "16sHH"
+
+#struct type            I       I          I            I         I               I
+SEQ = namedtuple('SEQ','version subversion minorversion something soundBankOffset soundBankSize')
+SEQStructString = "6I"
+
+#struct type               4s       I       I          I            I    H H H H                I                I            I I I
+SB1K = namedtuple('SB1K','signature version subversion minorversion zero e f g h instrumentOffset regionOffset k l m')
+SB1kStructString = "4sIIIIHHHHIIIII"
+
+#struct type                          I      h h h            h
+Instrument = namedtuple('Instrument','volume a b regionOffset d')
+InstrumentStructString = 'IHHHH'
+
+Region = namedtuple('Region','version subversion a volume b c d e1 e2 f1 f2 g1 sampleId zeros1 zeros2 zero3')
+RegionStructString = 'IIBBBBIHHHHHHIII'
+
+with open(args.filepath, "rb") as f:
+    sbkInstance = SBK._make(struct.unpack(SBKStructString,f.read(24)))
+    print(sbkInstance)
+    soundDatas = []
+
+    for i in range(sbkInstance.soundCount):
+        soundData = Sound._make(struct.unpack(SoundStructString,f.read(20)))
+        soundDatas.append(soundData)
+        print(soundData)
+    
+    # a ton of zeros
+    while(struct.unpack("B",f.read(1))[0] == 0):
+        continue
+    # found something rewind a byte
+    f.seek(-1,1)
+
+    seqStart = f.tell()
+    seqInstance = SEQ._make(struct.unpack(SEQStructString,f.read(24)))
+    print(seqInstance)
+
+    soundbankStart = seqInstance.soundBankOffset + seqStart
+    print(f"SoundBank Offset: {soundbankStart}")
+
+    soundBankHeaderStart = f.tell()
+    SB1KInstance = SB1K._make(struct.unpack(SB1kStructString,f.read(48)))
+    print(SB1KInstance)
+
+    # there is some data here
+    instrumentStart = SB1KInstance[8] + soundBankHeaderStart
+    regionStart = SB1KInstance[10] + soundBankHeaderStart
+
+    f.seek(instrumentStart)
+
+    instruments = []
+    while(f.tell() < regionStart):
+        
+        instrumentInstance = Instrument._make(struct.unpack(InstrumentStructString,f.read(12)))
+        instruments.append(instrumentInstance)
+
+    print("INSTRUMENTS")
+    offsets = []
+    for inst in instruments:
+        if inst.regionOffset not in offsets:
+            offsets.append(inst.regionOffset)
+        print(inst)
+    f.seek(regionStart)
+
+    regions = []
+    while(f.tell()<soundbankStart):
+        #format defintely not right but 
+        regionInstance = Region._make(struct.unpack(RegionStructString, f.read(40)))
+        regions.append(regionInstance)
+    print("REGIONS")
+    sampleOffsets = []
+    for reg in regions:
+        print(reg)
+        sampleOffset = soundbankStart + reg[-4]
+        if sampleOffset not in sampleOffsets:
+            sampleOffsets.append(sampleOffset)