Use LC_ALL instead of LANG since the former overrides the latter.
[libav.git] / cws2fws.c
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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
19main(int argc, char *argv[])
20{
21 int fd_in, fd_out, comp_len, uncomp_len, tag, i, last_out;
0c2ed2df 22 char buf_in[1024], buf_out[65536];
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23 z_stream zstream;
24 struct stat statbuf;
25
26 if (argc < 3)
27 {
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28 printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
29 exit(1);
f7599d5f 30 }
115329f1 31
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32 fd_in = open(argv[1], O_RDONLY);
33 if (fd_in < 0)
34 {
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35 perror("Error while opening: ");
36 exit(1);
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37 }
38
39 fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
40 if (fd_out < 0)
41 {
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42 perror("Error while opening: ");
43 close(fd_in);
44 exit(1);
f7599d5f 45 }
115329f1 46
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47 if (read(fd_in, &buf_in, 8) != 8)
48 {
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49 printf("Header error\n");
50 close(fd_in);
51 close(fd_out);
52 exit(1);
f7599d5f 53 }
115329f1 54
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55 if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S')
56 {
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57 printf("Not a compressed flash file\n");
58 exit(1);
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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
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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
0c2ed2df 76 for (i = 0; i < comp_len-8;)
f7599d5f 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
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84 zstream.next_in = &buf_in[0];
85 zstream.avail_in = len;
86 zstream.next_out = &buf_out[0];
0c2ed2df 87 zstream.avail_out = 65536;
115329f1 88
bb270c08 89 ret = inflate(&zstream, Z_SYNC_FLUSH);
0c2ed2df 90 if (ret != Z_STREAM_END && ret != Z_OK)
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91 {
92 printf("Error while decompressing: %d\n", ret);
93 inflateEnd(&zstream);
94 exit(1);
95 }
115329f1 96
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97 dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n",
98 zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out,
99 zstream.total_out-last_out);
115329f1 100
bb270c08 101 write(fd_out, &buf_out, zstream.total_out-last_out);
f7599d5f 102
bb270c08 103 i += len;
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104
105 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
106 break;
f7599d5f 107 }
115329f1 108
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109 if (zstream.total_out != uncomp_len-8)
110 {
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111 printf("Size mismatch (%d != %d), updating header...\n",
112 zstream.total_out, uncomp_len-8);
f7599d5f 113
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114 buf_in[0] = (zstream.total_out+8) & 0xff;
115 buf_in[1] = (zstream.total_out+8 >> 8) & 0xff;
116 buf_in[2] = (zstream.total_out+8 >> 16) & 0xff;
117 buf_in[3] = (zstream.total_out+8 >> 24) & 0xff;
115329f1 118
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119 lseek(fd_out, 4, SEEK_SET);
120 write(fd_out, &buf_in, 4);
f7599d5f 121 }
115329f1 122
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123 inflateEnd(&zstream);
124 close(fd_in);
125 close(fd_out);
126}