w3gtest/decompress.py at master · AiStudent/w3gtest · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173

import zlib
import struct
import sys

class CouldNotDecompress(Exception):
    pass

class FirstHeader:
    def __init__(self, data):
        (
            self.fileoffset,
            self.compressed_size,
            self.replay_header_version,
            self.decompressed_size,
            self.nr_of_compressed_blocks
        ) = struct.unpack('<5i', data)

    def get_hm(self):
        return {'fileoffset': self.fileoffset,
                'compressed_size': self.compressed_size,
                'replay_header_version': self.replay_header_version,
                'decompressed_size': self.decompressed_size,
                'nr_of_compressed_blocks': self.nr_of_compressed_blocks}

class SubHeader:
    def __init__(self, data):
        self.game_str = b''.join(struct.unpack('cccc', data[3::-1])).decode("utf-8")
        (
            self.version_number,
            self.build_number,
            self.flags,
            self.replay_length_ms,
            self.header_checksum
            ) = struct.unpack('ihhii', data[4:])

    def get_hm(self):
        return {'game_str': self.game_str,
                'version_number': self.version_number,
                'build_number': self.build_number,
                'flags': self.flags,
                'replay_length_ms': self.replay_length_ms,
                'header_checksum': self.header_checksum
                }

class Block:
    def __init__(self, data):
        (
            self.size_compressed,
            self.size_decompressed,
            self.unknown_checksum,
        ) = struct.unpack('hhi', data[0:8])

    def decompress(self, data):
        self.data = data
        z = zlib.decompressobj()
        data = z.decompress(self.data)
        return data


# testing time
def decompress_block_function(data):
    (
        size_compressed,
        size_decompressed,
        unknown_checksum,
    ) = struct.unpack('hhi', data[0:8])

    z = zlib.decompressobj()
    data = z.decompress(data)
    return data


def decompress(data, status = None):
    try:
        first_header = FirstHeader(data[0x1c:0x30])
        sub_header = SubHeader(data[0x30:0x44])
        #print(sub_header.get_hm())
        decompressed_data = bytearray(first_header.decompressed_size)
        block_i = 0x44
        n = 0

        decom_i = 0 # decompressed data index

        if sub_header.version_number > 10031 or sub_header.version_number == 0:  # temp replay
            header_len = 12
            unpacking = 'iii'
        else:
            header_len = 8
            unpacking = 'hhi'
        #print(hex(block_i))
        #print('header_len', header_len)
        while block_i < len(data):
            #print(n, ':', block_i,'/', len(data))
            if status:
                status.progress = (block_i, len(data))

            n+=1

            (
                size_compressed,
                size_decompressed,
                unknown_checksum,
            ) = struct.unpack(unpacking, data[block_i:block_i+header_len])
            #print(hex(block_i), size_compressed, size_decompressed)
            z = zlib.decompressobj()

            data_block = data[block_i+header_len : block_i+header_len+size_compressed]
            data_block = z.decompress(data_block)

            decompressed_data[decom_i: decom_i+len(data_block)] = data_block
            decom_i += len(data_block)

            block_i += header_len + size_compressed

        if status:
            status.progress = (block_i, len(data))
        return decompressed_data
    except Exception as e:
        raise CouldNotDecompress


# Arguments used for threading
def decompress_replay(data, status = None):
    decompressed_data = data[:0x44] + decompress(data, status)
    return decompressed_data


if __name__ == '__main__':
    try:
        name = sys.argv[1]
    except IndexError:
        name = 'ra.w3g'

    f = open(name, "rb")
    data = f.read()
    f.close()
    import time

    first_header = FirstHeader(data[0x1c:0x30])
    sub_header = SubHeader(data[0x30:0x44])

    #print(first_header.get_hm())
    #print(sub_header.get_hm())

    t0 = time.time()
    """
    thread1 = threading.Thread(target=decompress_replay, args=(data, q1, qrv))
    thread1.start()

    progress = 0
    while progress < 100:
        done, total = q1.get(True)
        progress = 100*done / total
        #print(done,'/', total)

    data = qrv.get_nowait()
    """
    data = decompress_replay(data)
    print('first header info:')
    print('compressed size', first_header.compressed_size)
    print('decompressed size', first_header.decompressed_size)


    t1 = time.time()

    print(t1-t0)

    f = open(name[0:-3] + "txt", "wb")
    f.write(data)
    f.close()