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da18e918a4
This avoids having to overestimate the md5 context size, which isn't known beforehand, allowing us to use the new allocate functions instead. Signed-off-by: Martin Storsjö <martin@martin.st>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* Copyright (c) 2010 Mans Rullgard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include "libavutil/avstring.h"
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#include "libavutil/md5.h"
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#include "libavutil/mem.h"
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#include "libavutil/error.h"
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#include "avformat.h"
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#include "avio.h"
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#include "url.h"
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struct MD5Context {
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struct AVMD5 *md5;
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};
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static int md5_open(URLContext *h, const char *filename, int flags)
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{
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struct MD5Context *c = h->priv_data;
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if (!(flags & AVIO_FLAG_WRITE))
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return AVERROR(EINVAL);
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c->md5 = av_md5_alloc();
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if (!c->md5)
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return AVERROR(ENOMEM);
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av_md5_init(c->md5);
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return 0;
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}
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static int md5_write(URLContext *h, const unsigned char *buf, int size)
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{
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struct MD5Context *c = h->priv_data;
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av_md5_update(c->md5, buf, size);
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return size;
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}
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static int md5_close(URLContext *h)
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{
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struct MD5Context *c = h->priv_data;
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const char *filename = h->filename;
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uint8_t md5[16], buf[64];
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URLContext *out;
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int i, err = 0;
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av_md5_final(c->md5, md5);
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for (i = 0; i < sizeof(md5); i++)
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snprintf(buf + i*2, 3, "%02x", md5[i]);
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buf[i*2] = '\n';
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av_strstart(filename, "md5:", &filename);
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if (*filename) {
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err = ffurl_open(&out, filename, AVIO_FLAG_WRITE,
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&h->interrupt_callback, NULL);
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if (err)
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return err;
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err = ffurl_write(out, buf, i*2+1);
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ffurl_close(out);
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} else {
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if (fwrite(buf, 1, i*2+1, stdout) < i*2+1)
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err = AVERROR(errno);
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}
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av_freep(&c->md5);
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return err;
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}
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URLProtocol ff_md5_protocol = {
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.name = "md5",
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.url_open = md5_open,
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.url_write = md5_write,
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.url_close = md5_close,
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.priv_data_size = sizeof(struct MD5Context),
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};
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