/*
* cws2fws by Alex Beregszaszi <alex@fsn.hu>
+ * Public domain.
*
* This utility converts compressed Macromedia Flash files to uncompressed ones.
*
main(int argc, char *argv[])
{
int fd_in, fd_out, comp_len, uncomp_len, tag, i, last_out;
- char buf_in[1024], buf_out[1024];
+ char buf_in[1024], buf_out[65536];
z_stream zstream;
struct stat statbuf;
if (argc < 3)
{
- printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
- exit(1);
+ printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
+ exit(1);
}
-
+
fd_in = open(argv[1], O_RDONLY);
if (fd_in < 0)
{
- perror("Error while opening: ");
- exit(1);
+ perror("Error while opening: ");
+ exit(1);
}
fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
if (fd_out < 0)
{
- perror("Error while opening: ");
- close(fd_in);
- exit(1);
+ perror("Error while opening: ");
+ close(fd_in);
+ exit(1);
}
-
+
if (read(fd_in, &buf_in, 8) != 8)
{
- printf("Header error\n");
- close(fd_in);
- close(fd_out);
- exit(1);
+ printf("Header error\n");
+ close(fd_in);
+ close(fd_out);
+ exit(1);
}
-
+
if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S')
{
- printf("Not a compressed flash file\n");
- exit(1);
+ printf("Not a compressed flash file\n");
+ exit(1);
}
fstat(fd_in, &statbuf);
comp_len = statbuf.st_size;
uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
-
+
printf("Compressed size: %d Uncompressed size: %d\n", comp_len-4, uncomp_len-4);
// write out modified header
zstream.zfree = NULL;
zstream.opaque = NULL;
inflateInit(&zstream);
-
- for (i = 0; i < comp_len-4;)
+
+ for (i = 0; i < comp_len-8;)
{
- int ret, len = read(fd_in, &buf_in, 1024);
-
- dbgprintf("read %d bytes\n", len);
-
- last_out = zstream.total_out;
-
- zstream.next_in = &buf_in[0];
- zstream.avail_in = len;
- zstream.next_out = &buf_out[0];
- zstream.avail_out = 1024;
-
- ret = inflate(&zstream, Z_SYNC_FLUSH);
- if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
- break;
- if (ret != Z_OK)
- {
- printf("Error while decompressing: %d\n", ret);
- inflateEnd(&zstream);
- exit(1);
- }
-
- dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n",
- zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out,
- zstream.total_out-last_out);
-
- write(fd_out, &buf_out, zstream.total_out-last_out);
-
- i += len;
+ int ret, len = read(fd_in, &buf_in, 1024);
+
+ dbgprintf("read %d bytes\n", len);
+
+ last_out = zstream.total_out;
+
+ zstream.next_in = &buf_in[0];
+ zstream.avail_in = len;
+ zstream.next_out = &buf_out[0];
+ zstream.avail_out = 65536;
+
+ ret = inflate(&zstream, Z_SYNC_FLUSH);
+ if (ret != Z_STREAM_END && ret != Z_OK)
+ {
+ printf("Error while decompressing: %d\n", ret);
+ inflateEnd(&zstream);
+ exit(1);
+ }
+
+ dbgprintf("a_in: %d t_in: %d a_out: %d t_out: %d -- %d out\n",
+ zstream.avail_in, zstream.total_in, zstream.avail_out, zstream.total_out,
+ zstream.total_out-last_out);
+
+ write(fd_out, &buf_out, zstream.total_out-last_out);
+
+ i += len;
+
+ if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
+ break;
}
-
+
if (zstream.total_out != uncomp_len-8)
{
- printf("Size mismatch (%d != %d), updating header...\n",
- zstream.total_out, uncomp_len-8);
-
- buf_in[0] = (zstream.total_out+8) & 0xff;
- buf_in[1] = (zstream.total_out+8 >> 8) & 0xff;
- buf_in[2] = (zstream.total_out+8 >> 16) & 0xff;
- buf_in[3] = (zstream.total_out+8 >> 24) & 0xff;
-
- lseek(fd_out, 4, SEEK_SET);
- write(fd_out, &buf_in, 4);
+ printf("Size mismatch (%d != %d), updating header...\n",
+ zstream.total_out, uncomp_len-8);
+
+ buf_in[0] = (zstream.total_out+8) & 0xff;
+ buf_in[1] = (zstream.total_out+8 >> 8) & 0xff;
+ buf_in[2] = (zstream.total_out+8 >> 16) & 0xff;
+ buf_in[3] = (zstream.total_out+8 >> 24) & 0xff;
+
+ lseek(fd_out, 4, SEEK_SET);
+ write(fd_out, &buf_in, 4);
}
-
+
inflateEnd(&zstream);
close(fd_in);
close(fd_out);