Pac-Man World TXTP Maker

import os
import sys
import struct

_svm_ptable = [
    4096, 4110, 4125, 4140, 4155, 4170, 4185, 4200,
    4216, 4231, 4246, 4261, 4277, 4292, 4308, 4323,
    4339, 4355, 4371, 4386, 4402, 4418, 4434, 4450,
    4466, 4482, 4499, 4515, 4531, 4548, 4564, 4581,
    4597, 4614, 4630, 4647, 4664, 4681, 4698, 4715,
    4732, 4749, 4766, 4783, 4801, 4818, 4835, 4853,
    4870, 4888, 4906, 4924, 4941, 4959, 4977, 4995,
    5013, 5031, 5050, 5068, 5086, 5105, 5123, 5142,
    5160, 5179, 5198, 5216, 5235, 5254, 5273, 5292,
    5311, 5331, 5350, 5369, 5389, 5408, 5428, 5447,
    5467, 5487, 5507, 5527, 5547, 5567, 5587, 5607,
    5627, 5648, 5668, 5688, 5709, 5730, 5750, 5771,
    5792, 5813, 5834, 5855, 5876, 5898, 5919, 5940,
    5962, 5983, 6005, 6027, 6049, 6070, 6092, 6114,
    6137, 6159, 6181, 6203, 6226, 6248, 6271, 6294,
    6316, 6339, 6362, 6385, 6408, 6431, 6455, 6478,
    6501, 6525, 6549, 6572, 6596, 6620, 6644, 6668,
    6692, 6716, 6741, 6765, 6789, 6814, 6839, 6863,
    6888, 6913, 6938, 6963, 6988, 7014, 7039, 7064,
    7090, 7116, 7141, 7167, 7193, 7219, 7245, 7271,
    7298, 7324, 7351, 7377, 7404, 7431, 7458, 7485,
    7512, 7539, 7566, 7593, 7621, 7648, 7676, 7704,
    7732, 7760, 7788, 7816, 7844, 7873, 7901, 7930,
    7958, 7987, 8016, 8045, 8074, 8103, 8133, 8162,
    8192
]

def SsPitchFromNote(note, fine, center, shift):
    sfine=fine+shift
    if sfine<0: sfine+=7
    sfine>>=3

    add=0
    if sfine>15:
        add=1
        sfine-=16

    calc=add+(note-(center-60))
    pitch=_svm_ptable[16*(calc%12)+sfine]
    typ=calc//12-5

    # regular shift
    if typ>0: return pitch<<typ
    # negative shift
    if typ<0: return pitch>>-typ

    return pitch

# 60/80 - in-game pitch, 60/0 - correct pitch
note=60
fine=80

if __name__=="__main__":
    fname=sys.argv[1]
    if not fname.lower().endswith(".vca"):
        sys.exit(0)
    dname=os.path.dirname(fname)
    bname=os.path.basename(fname)

    f=open(fname,"rb")
    for i in range(999):
        test=f.read(0x04)
        if test==b"\xFF\xFF\xFF\xFF":
            break

        f.seek(-4,1)
        values=struct.unpack("<HHBBHIIII", f.read(0x18))
        center=values[2]
        shift=values[3]
        pitch=SsPitchFromNote(note,fine,center,shift)
        freq=pitch*44100//4096
        comment="note: %d fine: %d center: %d shift: %d -> %s -> %s Hz" % (note,fine,center,shift,pitch,freq)
        print(comment)
        f2=open(os.path.join(dname,"%s_%d.txtp" % (bname,i+1)),"w")
        f2.write("%s#s%d#h%d ## %s\n" % (bname,i+1,freq,comment))
        f2.close()
    f.close()