diff options
author | Michael Niedermayer <michaelni@gmx.at> | 2013-05-08 17:35:01 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2013-05-09 18:21:17 +0400 |
commit | 3d66ce17b7f809b195595ec5e785a67957e48e7d (patch) | |
tree | 2987033be84aef77f622e3e5f1ff90645207db60 /tools | |
parent | d1cb559a6a358a141d5c8672e893f5561343baf5 (diff) |
tools: Add adler32 checksum tool
This is about 6 times faster than md5sum on linux
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/ffadler.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/tools/ffadler.c b/tools/ffadler.c new file mode 100644 index 0000000000..ff0e31f2cc --- /dev/null +++ b/tools/ffadler.c @@ -0,0 +1,73 @@ +/* +* Copyright (c) 2002 Fabrice Bellard +* Copyright (c) 2013 Michael Niedermayer + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" +#include "libavutil/adler32.h" + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <sys/stat.h> + +#if HAVE_IO_H +#include <io.h> +#endif +#if HAVE_UNISTD_H +#include <unistd.h> +#endif + +#define SIZE 65536 + +int main(int argc, char **argv) +{ + uint8_t buffer[SIZE]; + uint32_t checksum = 1; + int fd; + int ret = 0; + + if (argc > 1) fd = open(argv[1], O_RDONLY); + else fd = 0; + if (fd == -1) { + printf("A32=OPEN-FAILED-%d\n", errno); + ret = 1; + goto end; + } + + for (;;) { + ssize_t size = read(fd, buffer, SIZE); + if (size < 0) { + printf("A32=0x%08x+READ-FAILED-%d\n", checksum, errno); + ret = 2; + goto end; + } else if(!size) + break; + checksum = av_adler32_update(checksum, buffer, size); + } + close(fd); + + printf("A32=0x%08x", checksum); +end: + if (argc > 1) + printf(" *%s", argv[1]); + printf("\n"); + + return ret; +} |