RGSS1 สคริปท์ล็อคไฟล์เสียง[Sound Encrypt]

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##########################################################################

# Script by: BEHEMOTH # #

####################### #

#Version: 1.0 #

#Date Created: October 26th 2006 8:42 PM (Eastern Standard Time) #

#Description: An encryption script for audio files. #

#Thanks goes to thephantom from http://www.phanxgames.com/ for pointing out #

#the whole encryption key idea which I was too blind to see. #

#############################################################################

#############################################################################

# ***IMPORTANT RESTRICTIONS*** #

#1) If the audio file is an .mp3 file, it will NOT encrypt the file and it #

#will play it normally. If you wish to have your mp3 file encrypted please #

#save it as another compatible audio file, such as .ogg, .mid #

#or .wav(compressed of course) or .wma #

# #

#2) Your audio files must NOT be: read only, or hidden, or protected in #

#anyway or it will not encrypt the file and it will play it normally. #

# #

#3) Audio files should not have the same filename with a different #

# extension. #

# BAD: "battle01.mid" "battle01.ogg" #

# GOOD: "battle01.mid" "battle02.ogg" #

# #

#4) Files from an RMXP RTP will not be encrypted and will play normally. #

#############################################################################

#############################################################################

# ***NOTES*** #

#Positives: #

# - Protects your own custom audio files #

# - Gives a point to having a BGM test inside your game #

# - Ummmm.......it's cool #

# #

#Negatives: #

# - Audio files take slightly longer to load #

# - mp3 files do not encrypt #

# - Once encrypted, audio files will not play in rmxp gui, only in the game #

# - The audio file is slightly bigger in file size then the orginal file #

# #

#If you have problems, suggestions, comments about this script then you can #

#currently find me here: http://www.phanxgames.com/forum/ #

# #

#How to Use: #

#To encrypt your audio files play the file in your game at least once. #

#The script will handle the rest. MAKE SURE TO BACK UP YOUR ORIGINAL #

#AUDIO FILES BEFORE ENCRYPTING IT, because it automatically overwrites #

#the original file with the encrypted file. To make this script encrypt #

#only certain audio files such as BGM, BGS, ME, SE then change the values #

#of the variables below named: #

#ENCRYPT_BGM, ENCRYPT_BGS, ENCRYPT_ME, ENCRYPT_SE #

# (located below class Game_System) #

#changing the value to true means those files will be encrypted and false #

#means those files will not be encrypted. Changing these values when an #

#audio file is encrypted may cause undesired results. So choose what you #

#want first then start encrypting your audio files. Deleting the Encryption #

#key file (default = "audio.edat") after encrypting your audio will also #

#result in undesired results....so don't delete or move that file once #

#you've been encrypting or else you'll have to start encrypting all your #

#audio again. This script is more for people who create their own audio #

#files. #

#############################################################################

class Game_System

ENCRYPT_EXT = ".eaudio" #Encrypted file extenstion

ENCRYPT_FILE = "audio.edat" #File containing encrypted data

ENCRYPT_KEY_LENGTH = 16 #Number of characters for encryption key

#Change encryption for certain audio files.......HERE!!!!!

ENCRYPT_BGM = true #Encrypt bgm?

ENCRYPT_BGS = false #Encrypt bgs?

ENCRYPT_ME = false #Encrypt me? Yes, please! lol

ENCRYPT_SE = false #Encrypt se?

#--------------------------------------------------------------------------

# * Play Background Music

# bgm : background music to be played

#--------------------------------------------------------------------------

def bgm_play(bgm)

@playing_bgm = bgm

if bgm != nil and bgm.name != ""

filename = "Audio/BGM/" + bgm.name

if ENCRYPT_BGM

decrypt_file(filename)

Audio.bgm_play(filename, bgm.volume, bgm.pitch)

encrypt_file(filename)

else

Audio.bgm_play(filename, bgm.volume, bgm.pitch)

end

else

Audio.bgm_stop

end

Graphics.frame_reset

end

#--------------------------------------------------------------------------

# * Play Background Sound

# bgs : background sound to be played

#--------------------------------------------------------------------------

def bgs_play(bgs)

@playing_bgs = bgs

if bgs != nil and bgs.name != ""

filename = "Audio/BGS/" + bgs.name

if ENCRYPT_BGS

decrypt_file(filename)

Audio.bgs_play(filename, bgs.volume, bgs.pitch)

encrypt_file(filename)

else

Audio.bgs_play(filename, bgs.volume, bgs.pitch)

end

else

Audio.bgs_stop

end

Graphics.frame_reset

end

#--------------------------------------------------------------------------

# * Play Music Effect

# me : music effect to be played

#--------------------------------------------------------------------------

def me_play(me)

if me != nil and me.name != ""

filename = "Audio/ME/" + me.name

if ENCRYPT_ME

decrypt_file(filename)

Audio.me_play(filename, me.volume, me.pitch)

encrypt_file(filename)

else

Audio.me_play(filename, me.volume, me.pitch)

end

else

Audio.me_stop

end

Graphics.frame_reset

end

#--------------------------------------------------------------------------

# * Play Sound Effect

# se : sound effect to be played

#--------------------------------------------------------------------------

def se_play(se)

if se != nil and se.name != ""

filename = "Audio/SE/" + se.name

if ENCRYPT_SE

decrypt_file(filename)

Audio.se_play(filename, se.volume, se.pitch)

encrypt_file(filename)

else

Audio.se_play(filename, se.volume, se.pitch)

end

end

end

#--------------------------------------------------------------------------

# Finds the extension of an audio filename with no extension

#--------------------------------------------------------------------------

def get_file_ext(filename)

if FileTest.exist?(filename + ".wav")

return ".wav"

elsif FileTest.exist?(filename + ".mp3")

return ".mp3"

elsif FileTest.exist?(filename + ".ogg")

return ".ogg"

elsif FileTest.exist?(filename + ".mid")

return ".mid"

elsif FileTest.exist?(filename + ".wma")

return ".wma"

else

return ENCRYPT_EXT

end

end

#--------------------------------------------------------------------------

# Encrypts an audio file and saves it with the encrypted extension and

# deletes the non encrypted file if it was not already encrypted.

#--------------------------------------------------------------------------

def encrypt_file(filename)

ext = get_file_ext(filename)

filen = filename + ext

# If file doesn't not exist in project/audio folder then exit.

# File either doesn't exist or is part of the RTP.

if (not FileTest.exist?(filen))

return

end

# Load File

afile = File.open(filen, "rb")

t = afile.readlines

afile.close

#If filename was not previously encrypted

if ext != ENCRYPT_EXT

begin

# Test if file is writeable

afile = File.open(filen, "wb")

afile.close

# Delete File

File.delete(filen)

rescue

#File could not be encrypted

return

end

end

get_encryption

# Save File

filen = filename + ENCRYPT_EXT

afile = File.open(filen, "wb")

for i in 0...t.size

s = @encrypt_data + t[i]

t[i] = s

end

Marshal.dump(t, afile)

afile.close

end

#--------------------------------------------------------------------------

# Decrypts a file if it is encrypted.

#--------------------------------------------------------------------------

def decrypt_file(filename)

filename += ENCRYPT_EXT

#If file is not encrypted

if (not FileTest.exist?(filename))

return

end

get_encryption

# Load File

afile = File.open(filename, "rb") 

t = Marshal.load(afile)

for i in 0...t.size

s = t[i]

t[i] = s[ENCRYPT_KEY_LENGTH, t[i].size]

end 

afile.close

# Save File

afile = File.open(filename, "wb")

for i in 0...t.size

afile.write(t[i])

end

afile.close

end

#--------------------------------------------------------------------------

# * Retrieve's encryption data from file. If file doesn't exist then it

# creates an encryption data file.

#--------------------------------------------------------------------------

def get_encryption

# No encryption data(method) found

if @encrypt_data == nil

# Encryption data file exists?

if FileTest.exist?(ENCRYPT_FILE)

# Load Data File

afile = File.open(ENCRYPT_FILE, "rb")

@encrypt_data = Marshal.load(afile)

afile.close

else

# Create encryption data file

afile = File.open(ENCRYPT_FILE, "wb")

Marshal.dump(create_key, afile)

afile.close

end

end

end

#--------------------------------------------------------------------------

# * Returns ENCRYPT_KEY_LENGTH character randomized string used to encrypt

# the audio file

#--------------------------------------------------------------------------

def create_key

key = ""

for i in 0...ENCRYPT_KEY_LENGTH

key_num = rand(36)

key_char = key_num.to_s(36)

upper_case = rand(2) == 1

if key_num > 9 && upper_case

key_char.upcase!

end

key += key_char

end

return key

end

#--------------------------------------------------------------------------

end