Commit | Line | Data |
---|---|---|
f7599d5f AB |
1 | /* |
2 | * cws2fws by Alex Beregszaszi <alex@fsn.hu> | |
3 | * | |
4 | * This utility converts compressed Macromedia Flash files to uncompressed ones. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <sys/stat.h> | |
9 | #include <fcntl.h> | |
10 | #include <unistd.h> | |
11 | #include <zlib.h> | |
12 | ||
13 | #ifdef DEBUG | |
14 | #define dbgprintf printf | |
15 | #else | |
16 | #define dbgprintf | |
17 | #endif | |
18 | ||
19 | main(int argc, char *argv[]) | |
20 | { | |
21 | int fd_in, fd_out, comp_len, uncomp_len, tag, i, last_out; | |
22 | char buf_in[1024], buf_out[1024]; | |
23 | z_stream zstream; | |
24 | struct stat statbuf; | |
25 | ||
26 | if (argc < 3) | |
27 | { | |
bb270c08 DB |
28 | printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]); |
29 | exit(1); | |
f7599d5f | 30 | } |
115329f1 | 31 | |
f7599d5f AB |
32 | fd_in = open(argv[1], O_RDONLY); |
33 | if (fd_in < 0) | |
34 | { | |
bb270c08 DB |
35 | perror("Error while opening: "); |
36 | exit(1); | |
f7599d5f AB |
37 | } |
38 | ||
39 | fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644); | |
40 | if (fd_out < 0) | |
41 | { | |
bb270c08 DB |
42 | perror("Error while opening: "); |
43 | close(fd_in); | |
44 | exit(1); | |
f7599d5f | 45 | } |
115329f1 | 46 | |
f7599d5f AB |
47 | if (read(fd_in, &buf_in, 8) != 8) |
48 | { | |
bb270c08 DB |
49 | printf("Header error\n"); |
50 | close(fd_in); | |
51 | close(fd_out); | |
52 | exit(1); | |
f7599d5f | 53 | } |
115329f1 | 54 | |
f7599d5f AB |
55 | if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') |
56 | { | |
bb270c08 DB |
57 | printf("Not a compressed flash file\n"); |
58 | exit(1); | |
f7599d5f AB |
59 | } |
60 | ||
61 | fstat(fd_in, &statbuf); | |
62 | comp_len = statbuf.st_size; | |
63 | uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24); | |
115329f1 | 64 | |
f7599d5f AB |
65 | printf("Compressed size: %d Uncompressed size: %d\n", comp_len-4, uncomp_len-4); |
66 | ||
67 | // write out modified header | |
68 | buf_in[0] = 'F'; | |
69 | write(fd_out, &buf_in, 8); | |
70 | ||
71 | zstream.zalloc = NULL; | |
72 | zstream.zfree = NULL; | |
73 | zstream.opaque = NULL; | |
74 | inflateInit(&zstream); | |
115329f1 | 75 | |
f7599d5f AB |
76 | for (i = 0; i < comp_len-4;) |
77 | { | |
bb270c08 | 78 | int ret, len = read(fd_in, &buf_in, 1024); |
f7599d5f | 79 | |
bb270c08 | 80 | dbgprintf("read %d bytes\n", len); |
115329f1 | 81 | |
bb270c08 | 82 | last_out = zstream.total_out; |
115329f1 | 83 | |
bb270c08 DB |
84 | zstream.next_in = &buf_in[0]; |
85 | zstream.avail_in = len; | |
86 | zstream.next_out = &buf_out[0]; | |
87 | zstream.avail_out = 1024; | |
115329f1 | 88 | |
bb270c08 DB |
89 | ret = inflate(&zstream, Z_SYNC_FLUSH); |
90 | if (ret == Z_STREAM_END || ret == Z_BUF_ERROR) | |
91 | break; | |
92 | if (ret != Z_OK) | |
93 | { | |
94 | printf("Error while decompressing: %d\n", ret); | |
95 | inflateEnd(&zstream); | |
96 | exit(1); | |
97 | } | |
115329f1 | 98 | |
bb270c08 DB |
99 | dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n", |
100 | zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out, | |
101 | zstream.total_out-last_out); | |
115329f1 | 102 | |
bb270c08 | 103 | write(fd_out, &buf_out, zstream.total_out-last_out); |
f7599d5f | 104 | |
bb270c08 | 105 | i += len; |
f7599d5f | 106 | } |
115329f1 | 107 | |
f7599d5f AB |
108 | if (zstream.total_out != uncomp_len-8) |
109 | { | |
bb270c08 DB |
110 | printf("Size mismatch (%d != %d), updating header...\n", |
111 | zstream.total_out, uncomp_len-8); | |
f7599d5f | 112 | |
bb270c08 DB |
113 | buf_in[0] = (zstream.total_out+8) & 0xff; |
114 | buf_in[1] = (zstream.total_out+8 >> 8) & 0xff; | |
115 | buf_in[2] = (zstream.total_out+8 >> 16) & 0xff; | |
116 | buf_in[3] = (zstream.total_out+8 >> 24) & 0xff; | |
115329f1 | 117 | |
bb270c08 DB |
118 | lseek(fd_out, 4, SEEK_SET); |
119 | write(fd_out, &buf_in, 4); | |
f7599d5f | 120 | } |
115329f1 | 121 | |
f7599d5f AB |
122 | inflateEnd(&zstream); |
123 | close(fd_in); | |
124 | close(fd_out); | |
125 | } |