VA-Control-for-linux/reference/decompiled/cleanImage.py

# uncompyle6 version 3.9.3
# Python bytecode version base 2.6 (62161)
# Decompiled from: Python 3.9.25 (main, Oct 31 2025, 23:16:49) 
# [GCC 14.2.0]
# Embedded file name: cleanImage.pyc
# Compiled at: 2022-10-28 07:19:25
import mytime, struct

def findDataSize(data):
    i = len(data) - 1
    while i > 0:
        if ord(data[i]) != 255:
            return i + 1
        i -= 1

    return


def verifyChecksum(data):
    if ord(data[0]) == 251:
        return True
    else:
        dataSize = findDataSize(data)
        Checksum = 1454917101
        i = 0
        while i < (dataSize - 4) / 4:
            Checksum = Checksum ^ ord(data[i])
            i += 1

        while i < (dataSize - 4) / 2:
            Checksum = Checksum ^ ord(data[i]) << 8 & 65280
            i += 1

        while i < dataSize - 4:
            Checksum = Checksum ^ ord(data[i]) << 16 & 16711680
            i += 1

        try:
            storedChecksum = struct.unpack('<L', data[dataSize - 4:dataSize])[0]
        except:
            return False

        if storedChecksum == Checksum:
            return True
        print 'Checksum FAILED, calculated', hex(Checksum), ' but file says', hex(storedChecksum), 'preset corrupt?'
        return False
    return


updateImageStartAddress = 0

def verifySectorsperSlot(srcPath, sectorsPerSlot, flashDiskStart, sectorSize):
    f = open(srcPath, 'rb')
    data = f.read()
    f.close()
    mytime.sleep(0.1)
    slots = {}
    txt = 'Verifying slot size for ' + srcPath + ' with slot size ' + str(sectorsPerSlot) + ', data length ' + str(len(data)) + ' bytes, sector size ' + str(sectorSize) + ' bytes'
    slotSize = sectorsPerSlot * sectorSize
    data = data[flashDiskStart - updateImageStartAddress:]
    address = flashDiskStart
    verified = True
    foundGlobal = False
    foundLastPreset = False
    while len(data) >= sectorSize:
        slot = data[:slotSize]
        if ord(slot[0]) == 251:
            foundGlobal = True
        if ord(slot[0]) == 252:
            foundLastPreset = True
        if ord(slot[0]) != 0 and ord(slot[0]) != 251 and ord(slot[0]) != 255:
            checksum = verifyChecksum(slot)
            print 'verified slot', ord(slot[0]), 'naam:', slot[65:81], 'resultaat:', checksum, 'for', sectorsPerSlot, 'sectors per slot'
            if checksum == False:
                verified = False
                break
        data = data[slotSize:]
        address += slotSize

    if foundGlobal == False or foundLastPreset == False:
        verified = False
    if verified == True:
        txt += ': PASS'
        try:
            print txt
        except:
            pass

    else:
        try:
            txt += ': FAIL'
            print txt
        except:
            pass

    return verified


def getSectorsPerSlot(srcPath, sectorsPerSlot, flashDiskStart, sectorSize, limit):
    res = 0
    aantalGevonden = 0
    while True:
        if verifySectorsperSlot(srcPath, sectorsPerSlot, flashDiskStart, sectorSize):
            res = sectorsPerSlot
            return res
            aantalGevonden += 1
        sectorsPerSlot += 1
        if sectorsPerSlot > limit:
            break

    if aantalGevonden != 1:
        print 'ERROR -> niet 1 flash disk size gevonden', res, aantalGevonden
        return None
    else:
        return res


def cleanImage(srcPath, targetPath, sectorsPerSlot, flashDiskStart, sectorSize, limit):
    sectorsPerSlot = getSectorsPerSlot(srcPath, sectorsPerSlot, flashDiskStart, sectorSize, limit)
    print 'FFI slot size:', sectorsPerSlot
    if sectorsPerSlot == None:
        print 'Failed to verify slot size! Image unchanged'
        f = open(srcPath, 'rb')
        data = f.read()
        f.close()
        mytime.sleep(0.5)
        f = open(targetPath, 'wb')
        f.write(data)
        f.close()
        return
    else:
        f = open(srcPath, 'rb')
        data = f.read()
        f.close()
        mytime.sleep(0.1)
        slots = {}
        try:
            txt = mytime.displayTime() + ' Cleaning ' + srcPath
            print txt
        except:
            pass

        slotSize = sectorsPerSlot * sectorSize
        outData = data[:flashDiskStart]
        data = data[flashDiskStart:]
        address = flashDiskStart
        print 'd_p.Flash info: Slot size:', slotSize, 'sector size:', sectorSize, 'data length:', len(data), 'flash disk start address:', flashDiskStart
        while len(data) >= sectorSize:
            slot = data[:slotSize]
            if ord(slot[0]) != 0 and ord(slot[0]) != 255:
                checksum = verifyChecksum(slot)
                slots[ord(slot[0])] = slot
            data = data[slotSize:]
            address += slotSize

        for slotNumber in sorted(slots.keys()):
            slotData = slots[slotNumber]
            if slotNumber == 251:
                slotName = 'Global:       ' + slotData[1:17]
            elif slotNumber == 252:
                slotName = 'Last Setting: ' + slotData[67:83]
            elif slotNumber < 10:
                slotName = 'Preset:         ' + slotData[67:83]
            else:
                slotName = 'Preset:        ' + slotData[67:83]
            txt = mytime.displayTime() + '     Appending slot ' + str(slotNumber) + ': ' + slotName
            print txt
            outData += slotData

        f = open(targetPath, 'wb')
        f.write(outData)
        f.close()
        mytime.sleep(0.1)
        return


if __name__ == '__main__':
    cleanImage('presets/NAW/99_mac.ffi', 'presets/NAW/99_mac.ffi_compacted', 4, 196608, 4096, 16)

# okay decompiling pycode/cleanImage.pyc