graph2dot: Use the fallback getopt implementation if needed
[libav.git] / tools / cws2fws.c
1 /*
2 * cws2fws by Alex Beregszaszi
3 * This file is placed in the public domain.
4 * Use the program however you see fit.
5 *
6 * This utility converts compressed Macromedia Flash files to uncompressed ones.
7 */
8
9 #include "config.h"
10 #include <sys/stat.h>
11 #include <fcntl.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #if HAVE_UNISTD_H
15 #include <unistd.h>
16 #endif
17 #if HAVE_IO_H
18 #include <io.h>
19 #endif
20 #include <zlib.h>
21
22 #ifdef DEBUG
23 #define dbgprintf printf
24 #else
25 #define dbgprintf(...)
26 #endif
27
28 int main(int argc, char *argv[])
29 {
30 int fd_in, fd_out, comp_len, uncomp_len, i, last_out;
31 char buf_in[1024], buf_out[65536];
32 z_stream zstream;
33 struct stat statbuf;
34
35 if (argc < 3) {
36 printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
37 return 1;
38 }
39
40 fd_in = open(argv[1], O_RDONLY);
41 if (fd_in < 0) {
42 perror("Error opening input file");
43 return 1;
44 }
45
46 fd_out = open(argv[2], O_WRONLY | O_CREAT, 00644);
47 if (fd_out < 0) {
48 perror("Error opening output file");
49 close(fd_in);
50 return 1;
51 }
52
53 if (read(fd_in, &buf_in, 8) != 8) {
54 printf("Header error\n");
55 close(fd_in);
56 close(fd_out);
57 return 1;
58 }
59
60 if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') {
61 printf("Not a compressed flash file\n");
62 return 1;
63 }
64
65 fstat(fd_in, &statbuf);
66 comp_len = statbuf.st_size;
67 uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
68
69 printf("Compressed size: %d Uncompressed size: %d\n",
70 comp_len - 4, uncomp_len - 4);
71
72 // write out modified header
73 buf_in[0] = 'F';
74 if (write(fd_out, &buf_in, 8) < 8) {
75 perror("Error writing output file");
76 return 1;
77 }
78
79 zstream.zalloc = NULL;
80 zstream.zfree = NULL;
81 zstream.opaque = NULL;
82 inflateInit(&zstream);
83
84 for (i = 0; i < comp_len - 8;) {
85 int ret, len = read(fd_in, &buf_in, 1024);
86
87 dbgprintf("read %d bytes\n", len);
88
89 last_out = zstream.total_out;
90
91 zstream.next_in = &buf_in[0];
92 zstream.avail_in = len;
93 zstream.next_out = &buf_out[0];
94 zstream.avail_out = 65536;
95
96 ret = inflate(&zstream, Z_SYNC_FLUSH);
97 if (ret != Z_STREAM_END && ret != Z_OK) {
98 printf("Error while decompressing: %d\n", ret);
99 inflateEnd(&zstream);
100 return 1;
101 }
102
103 dbgprintf("a_in: %d t_in: %lu a_out: %d t_out: %lu -- %lu out\n",
104 zstream.avail_in, zstream.total_in, zstream.avail_out,
105 zstream.total_out, zstream.total_out - last_out);
106
107 if (write(fd_out, &buf_out, zstream.total_out - last_out) <
108 zstream.total_out - last_out) {
109 perror("Error writing output file");
110 return 1;
111 }
112
113 i += len;
114
115 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
116 break;
117 }
118
119 if (zstream.total_out != uncomp_len - 8) {
120 printf("Size mismatch (%lu != %d), updating header...\n",
121 zstream.total_out, uncomp_len - 8);
122
123 buf_in[0] = (zstream.total_out + 8) & 0xff;
124 buf_in[1] = ((zstream.total_out + 8) >> 8) & 0xff;
125 buf_in[2] = ((zstream.total_out + 8) >> 16) & 0xff;
126 buf_in[3] = ((zstream.total_out + 8) >> 24) & 0xff;
127
128 lseek(fd_out, 4, SEEK_SET);
129 if (write(fd_out, &buf_in, 4) < 4) {
130 perror("Error writing output file");
131 return 1;
132 }
133 }
134
135 inflateEnd(&zstream);
136 close(fd_in);
137 close(fd_out);
138 return 0;
139 }