rawdec: Support more QT 1bpp rawvideo files.
[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 <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 return 1;
33 }
34
35 fd_in = open(argv[1], O_RDONLY);
36 if (fd_in < 0)
37 {
38 perror("Error opening input file");
39 return 1;
40 }
41
42 fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
43 if (fd_out < 0)
44 {
45 perror("Error opening output file");
46 close(fd_in);
47 return 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 return 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 return 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 if (write(fd_out, &buf_in, 8) < 8) {
73 perror("Error writing output file");
74 return 1;
75 }
76
77 zstream.zalloc = NULL;
78 zstream.zfree = NULL;
79 zstream.opaque = NULL;
80 inflateInit(&zstream);
81
82 for (i = 0; i < comp_len-8;)
83 {
84 int ret, len = read(fd_in, &buf_in, 1024);
85
86 dbgprintf("read %d bytes\n", len);
87
88 last_out = zstream.total_out;
89
90 zstream.next_in = &buf_in[0];
91 zstream.avail_in = len;
92 zstream.next_out = &buf_out[0];
93 zstream.avail_out = 65536;
94
95 ret = inflate(&zstream, Z_SYNC_FLUSH);
96 if (ret != Z_STREAM_END && ret != Z_OK)
97 {
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, zstream.total_out,
105 zstream.total_out-last_out);
106
107 if (write(fd_out, &buf_out, zstream.total_out - last_out) < zstream.total_out - last_out) {
108 perror("Error writing output file");
109 return 1;
110 }
111
112 i += len;
113
114 if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
115 break;
116 }
117
118 if (zstream.total_out != uncomp_len-8)
119 {
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 }