artemis resource unpack

artemis.py

# coding:utf-8
import struct
import os
import os.path as opth
import sys
__version__ = 1.0

getPATH0 = lambda: sys.path[0].decode(sys.getfilesystemencoding())

# 命令行处理
try:
    dfile, outdir = sys.argv[1:3]
except:
    print('Artemis Engine Extractor v%.1f\nUsage artemis.py file directory cvas|-cvas|d bufsize\n\t To select resources: c:CG, v:video, a:audio, s:system, d:all; -:except' %
          __version__)
    os._exit(1)
outdir = opth.abspath(outdir)
if len(sys.argv) < 4:
    sel_res = '-ALL-'
else:
    sel_res = sys.argv[3]
sel_ext = []
if 'd' in sel_res:
    sel_res = '-ALL-'
if 'a' in sel_res:
    sel_ext += ['ogg', 'mp3']
if 'v' in sel_res:
    sel_ext += ['mp4', 'mov']
if 'c' in sel_res:
    sel_ext += ['jpg', 'png']
if 's' in sel_res:
    sel_ext += ['iet', 'ini', 'otf', 'ttf']
if '-' in sel_res:
    sel_res = '-'  # 表排除
if len(sys.argv) >= 5:
    bufsize = int(sys.argv[4]) * 1024 * 1024
else:
    bufsize = 10 * 1024 * 1024
# not-using
'''def rev(i):#转十六进制小端序
    str=hex(i)[2::]
    if str.endswith('L'):str=str[:-1]
    str=str.zfill(8)#补齐8位
    return str.decode('hex')[::-1].encode('hex')
def rev_int(i):
    return int(rev(i),16)'''
# a=open('jp.co.ideaf.hakuoki_kaikoroku\\main.3.jp.co.ideaf.hakuoki_kaikoroku.obb','rb').read(65628)
# open('head','wb').write(a)
# 读索引头
dtfile = open(dfile, 'rb')
head = dtfile.read(1024 * 1024)
curpos = 19  # 头部偏移
spltpos = head.find(b'\x10', curpos)
elem = []
elem_distr = ''
print('read resource table...')
# 生成资源表
while spltpos != -1:
    dt = head[curpos:spltpos + 24]
    name, pos, length, mark = struct.unpack(
        '<%ds12x3I' % (spltpos - curpos), dt)  # 使用小端序
    print('%x %x:%s %x %x %s' %
          (curpos, spltpos + 24, name, int(pos), int(length), mark))
    elem_distr += ('%s,%d,%d,%s,\r\n' % (name, int(pos), int(length), mark))
    elem.append([int(pos), int(length), mark, name])
    curpos = spltpos + 24
    spltpos = head.find(b'\x10', curpos, elem[0][0])
    # if len(elem)>10:break
print('%d resources found' % len(elem))
open('elem.txt', 'w').write(elem_distr)
elem.sort()
buf = ''
bufcnt = 0  # 已用buffer计数
rescnt = 0  # 已读资源计数
dtfile.seek(0)
if not opth.exists(outdir):
    os.makedirs(outdir)
# 读取并输出
for i in range(len(elem)):
    fname = elem[i][3]
    if ((not opth.splitext(fname)[1][1:] in sel_ext) ^ (sel_res == '-')) and sel_res != '-ALL-':
        print('Skip %s' % fname)
        continue
    if opth.split(fname)[0] != '' and not opth.exists(opth.join(outdir, opth.split(fname)[0])):
        os.makedirs(opth.join(outdir, opth.split(fname)[0]))
    while elem[i][0] + elem[i][1] > (bufcnt * bufsize + len(buf)):  # 需要读取文件时
        print('Reading %dKB to buffer:0x%x (want 0x%x)' % (
            bufsize / 1024, elem[i][0] + elem[i][1], bufcnt * bufsize + len(buf)))
        skip = (elem[i][0] - bufcnt * bufsize - len(buf)) / bufsize
        if skip > 0:
            buf = ''
            bufcnt = skip + bufcnt + len(buf) / bufsize
            dtfile.seek(bufcnt * bufsize)
        '''print elem[i][0],elem[i][1],elem[i][0]+elem[i][1]
        print bufcnt*bufsize,len(buf),bufcnt*bufsize+len(buf)
        print 'seek',skip,(bufcnt+skip)*bufsize,bufcnt
        raw_input()'''
        buf += dtfile.read(bufsize)
    # print elem[i][0]-bufcnt*bufsize,elem[i][1]+elem[i][0]-bufcnt*bufsize
    f = open(opth.join(outdir, fname), 'wb')
    f.write(
        buf[elem[i][0] - bufcnt * bufsize:elem[i][1] + elem[i][0] - bufcnt * bufsize])
    f.close()
    print('extract %s' % fname)
    while elem[i][0] >= bufcnt * bufsize + bufsize:  # 清理缓存
        if len(buf) >= bufsize:
            buf = buf[bufsize:]
        bufcnt += 1
        print('Clean up buffer #%d' % bufcnt)
    rescnt += 1
    # raw_input()


raw_input('done extracting %d resources.' % rescnt)

uhh, sorry for being an idiot but how to use this?

@tung12343 you will use
python ./artemis.py <path-to-packed-file> <path-for-extracted-files>
for example on Android the path-to-packed-file could be the .obb file in /sdcard/Android/data//

@tung12343 you will use
python ./artemis.py <path-to-packed-file> <path-for-extracted-files>
for example on Android the path-to-packed-file could be the .obb file in /sdcard/Android/data//

thankyou so much, Love you for replying