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/*
* MD5 encoder (for codec/format testing)
* Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard
*
* 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 "libavutil/md5.h"
#include "avformat.h"
#define PRIVSIZE 512
static void md5_finish(struct AVFormatContext *s, char *buf)
{
uint8_t md5[16];
int i, offset = strlen(buf);
av_md5_final(s->priv_data, md5);
for (i = 0; i < sizeof(md5); i++) {
snprintf(buf + offset, 3, "%02"PRIx8, md5[i]);
offset += 2;
}
buf[offset] = '\n';
buf[offset+1] = 0;
avio_write(s->pb, buf, strlen(buf));
avio_flush(s->pb);
}
#if CONFIG_MD5_MUXER
static int write_header(struct AVFormatContext *s)
{
if (PRIVSIZE < av_md5_size) {
av_log(s, AV_LOG_ERROR, "Insuffient size for md5 context\n");
return -1;
}
av_md5_init(s->priv_data);
return 0;
}
static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
av_md5_update(s->priv_data, pkt->data, pkt->size);
return 0;
}
static int write_trailer(struct AVFormatContext *s)
{
char buf[64] = "MD5=";
md5_finish(s, buf);
return 0;
}
AVOutputFormat ff_md5_muxer = {
.name = "md5",
.long_name = NULL_IF_CONFIG_SMALL("MD5 testing format"),
.extensions = "",
.priv_data_size = PRIVSIZE,
.audio_codec = CODEC_ID_PCM_S16LE,
.video_codec = CODEC_ID_RAWVIDEO,
.write_header = write_header,
.write_packet = write_packet,
.write_trailer = write_trailer,
};
#endif
#if CONFIG_FRAMEMD5_MUXER
static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
char buf[256];
if (PRIVSIZE < av_md5_size) {
av_log(s, AV_LOG_ERROR, "Insuffient size for md5 context\n");
return -1;
}
av_md5_init(s->priv_data);
av_md5_update(s->priv_data, pkt->data, pkt->size);
snprintf(buf, sizeof(buf) - 64, "%d, %"PRId64", %d, ", pkt->stream_index, pkt->dts, pkt->size);
md5_finish(s, buf);
return 0;
}
AVOutputFormat ff_framemd5_muxer = {
.name = "framemd5",
.long_name = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing format"),
.extensions = "",
.priv_data_size = PRIVSIZE,
.audio_codec = CODEC_ID_PCM_S16LE,
.video_codec = CODEC_ID_RAWVIDEO,
.write_packet = framemd5_write_packet,
};
#endif
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