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author | Alex Beregszaszi <alex@rtfs.hu> | 2004-10-16 11:08:49 +0000 |
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committer | Alex Beregszaszi <alex@rtfs.hu> | 2004-10-16 11:08:49 +0000 |
commit | f7599d5ff0ba61c7281e59f1e41ab1441446ba42 (patch) | |
tree | 0e9b3cf68edcc01a53ee009345eeadc33593b1f7 /cws2fws.c | |
parent | b2a2197e71b2287647ad4d79cf5b20d6096887b7 (diff) | |
download | ffmpeg-f7599d5ff0ba61c7281e59f1e41ab1441446ba42.tar.gz |
cws2fws, utility to convert compressed flash files to uncompressed ones, which can be than played back with ffplay. note: this doesn't gets compiled automatically
Originally committed as revision 3598 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'cws2fws.c')
-rw-r--r-- | cws2fws.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/cws2fws.c b/cws2fws.c new file mode 100644 index 0000000000..5fc6d08ddf --- /dev/null +++ b/cws2fws.c @@ -0,0 +1,125 @@ +/* + * cws2fws by Alex Beregszaszi <alex@fsn.hu> + * + * This utility converts compressed Macromedia Flash files to uncompressed ones. + * + */ + +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <zlib.h> + +#ifdef DEBUG +#define dbgprintf printf +#else +#define dbgprintf +#endif + +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]; + z_stream zstream; + struct stat statbuf; + + if (argc < 3) + { + 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); + } + + fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644); + if (fd_out < 0) + { + 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); + } + + if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') + { + 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 + buf_in[0] = 'F'; + write(fd_out, &buf_in, 8); + + zstream.zalloc = NULL; + zstream.zfree = NULL; + zstream.opaque = NULL; + inflateInit(&zstream); + + for (i = 0; i < comp_len-4;) + { + 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; + } + + 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); + } + + inflateEnd(&zstream); + close(fd_in); + close(fd_out); +} |