Remove unused file
[libav.git] / cws2fws.c
1 /*
2 * cws2fws by Alex Beregszaszi
3 * Public domain.
4 *
5 * This utility converts compressed Macromedia Flash files to uncompressed ones.
6 *
7 */
8
9 #include <sys/stat.h>
10 #include <fcntl.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include <zlib.h>
15
16 #ifdef DEBUG
17 #define dbgprintf printf
18 #else
19 #define dbgprintf
20 #endif
21
22 int main(int argc, char *argv[])
23 {
24 int fd_in, fd_out, comp_len, uncomp_len, i, last_out;
25 char buf_in[1024], buf_out[65536];
26 z_stream zstream;
27 struct stat statbuf;
28
29 if (argc < 3)
30 {
31 printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
32 exit(1);
33 }
34
35 fd_in = open(argv[1], O_RDONLY);
36 if (fd_in < 0)
37 {
38 perror("Error while opening: ");
39 exit(1);
40 }
41
42 fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
43 if (fd_out < 0)
44 {
45 perror("Error while opening: ");
46 close(fd_in);
47 exit(1);
48 }
49
50 if (read(fd_in, &buf_in, 8) != 8)
51 {
52 printf("Header error\n");
53 close(fd_in);
54 close(fd_out);
55 exit(1);
56 }
57
58 if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S')
59 {
60 printf("Not a compressed flash file\n");
61 exit(1);
62 }
63
64 fstat(fd_in, &statbuf);
65 comp_len = statbuf.st_size;
66 uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
67
68 printf("Compressed size: %d Uncompressed size: %d\n", comp_len-4, uncomp_len-4);
69
70 // write out modified header
71 buf_in[0] = 'F';
72 write(fd_out, &buf_in, 8);
73
74 zstream.zalloc = NULL;
75 zstream.zfree = NULL;
76 zstream.opaque = NULL;
77 inflateInit(&zstream);
78
79 for (i = 0; i < comp_len-8;)
80 {
81 int ret, len = read(fd_in, &buf_in, 1024);
82
83 dbgprintf("read %d bytes\n", len);
84
85 last_out = zstream.total_out;
86
87 zstream.next_in = &buf_in[0];
88 zstream.avail_in = len;
89 zstream.next_out = &buf_out[0];
90 zstream.avail_out = 65536;
91
92 ret = inflate(&zstream, Z_SYNC_FLUSH);
93 if (ret != Z_STREAM_END && ret != Z_OK)
94 {
95 printf("Error while decompressing: %d\n", ret);
96 inflateEnd(&zstream);
97 exit(1);
98 }
99
100 dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n",
101 zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out,
102 zstream.total_out-last_out);
103
104 write(fd_out, &buf_out, zstream.total_out-last_out);
105
106 i += len;
107
108 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
109 break;
110 }
111
112 if (zstream.total_out != uncomp_len-8)
113 {
114 printf("Size mismatch (%d != %d), updating header...\n",
115 zstream.total_out, uncomp_len-8);
116
117 buf_in[0] = (zstream.total_out+8) & 0xff;
118 buf_in[1] = (zstream.total_out+8 >> 8) & 0xff;
119 buf_in[2] = (zstream.total_out+8 >> 16) & 0xff;
120 buf_in[3] = (zstream.total_out+8 >> 24) & 0xff;
121
122 lseek(fd_out, 4, SEEK_SET);
123 write(fd_out, &buf_in, 4);
124 }
125
126 inflateEnd(&zstream);
127 close(fd_in);
128 close(fd_out);
129 return 0;
130 }