yading@11: /*
yading@11:  * Copyright (c) 2010 Mans Rullgard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include <stdio.h>
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/md5.h"
yading@11: #include "libavutil/mem.h"
yading@11: #include "libavutil/error.h"
yading@11: #include "avformat.h"
yading@11: #include "avio.h"
yading@11: #include "url.h"
yading@11: 
yading@11: struct MD5Context {
yading@11:     struct AVMD5 *md5;
yading@11: };
yading@11: 
yading@11: static int md5_open(URLContext *h, const char *filename, int flags)
yading@11: {
yading@11:     struct MD5Context *c = h->priv_data;
yading@11: 
yading@11:     if (!(flags & AVIO_FLAG_WRITE))
yading@11:         return AVERROR(EINVAL);
yading@11: 
yading@11:     c->md5 = av_md5_alloc();
yading@11:     if (!c->md5)
yading@11:         return AVERROR(ENOMEM);
yading@11:     av_md5_init(c->md5);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int md5_write(URLContext *h, const unsigned char *buf, int size)
yading@11: {
yading@11:     struct MD5Context *c = h->priv_data;
yading@11:     av_md5_update(c->md5, buf, size);
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: static int md5_close(URLContext *h)
yading@11: {
yading@11:     struct MD5Context *c = h->priv_data;
yading@11:     const char *filename = h->filename;
yading@11:     uint8_t md5[16], buf[64];
yading@11:     URLContext *out;
yading@11:     int i, err = 0;
yading@11: 
yading@11:     av_md5_final(c->md5, md5);
yading@11:     for (i = 0; i < sizeof(md5); i++)
yading@11:         snprintf(buf + i*2, 3, "%02x", md5[i]);
yading@11:     buf[i*2] = '\n';
yading@11: 
yading@11:     av_strstart(filename, "md5:", &filename);
yading@11: 
yading@11:     if (*filename) {
yading@11:         err = ffurl_open(&out, filename, AVIO_FLAG_WRITE,
yading@11:                          &h->interrupt_callback, NULL);
yading@11:         if (err)
yading@11:             return err;
yading@11:         err = ffurl_write(out, buf, i*2+1);
yading@11:         ffurl_close(out);
yading@11:     } else {
yading@11:         if (fwrite(buf, 1, i*2+1, stdout) < i*2+1)
yading@11:             err = AVERROR(errno);
yading@11:     }
yading@11: 
yading@11:     av_freep(&c->md5);
yading@11: 
yading@11:     return err;
yading@11: }
yading@11: 
yading@11: 
yading@11: URLProtocol ff_md5_protocol = {
yading@11:     .name                = "md5",
yading@11:     .url_open            = md5_open,
yading@11:     .url_write           = md5_write,
yading@11:     .url_close           = md5_close,
yading@11:     .priv_data_size      = sizeof(struct MD5Context),
yading@11: };