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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/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/hash.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
struct MD5Context {
const AVClass *avclass;
struct AVHashContext *hash;
char *hash_name;
int format_version;
};
static void md5_finish(struct AVFormatContext *s, char *buf)
{
struct MD5Context *c = s->priv_data;
uint8_t md5[AV_HASH_MAX_SIZE];
int i, offset = strlen(buf);
int len = av_hash_get_size(c->hash);
av_assert0(len > 0 && len <= sizeof(md5));
av_hash_final(c->hash, md5);
for (i = 0; i < len; 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);
}
#define OFFSET(x) offsetof(struct MD5Context, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption hash_options[] = {
{ "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "md5"}, 0, 0, ENC },
{ "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 1}, 1, 1, ENC },
{ NULL },
};
static const AVClass md5enc_class = {
.class_name = "hash encoder class",
.item_name = av_default_item_name,
.option = hash_options,
.version = LIBAVUTIL_VERSION_INT,
};
#if CONFIG_MD5_MUXER
static int write_header(struct AVFormatContext *s)
{
struct MD5Context *c = s->priv_data;
int res = av_hash_alloc(&c->hash, c->hash_name);
if (res < 0)
return res;
av_hash_init(c->hash);
return 0;
}
static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct MD5Context *c = s->priv_data;
av_hash_update(c->hash, pkt->data, pkt->size);
return 0;
}
static int write_trailer(struct AVFormatContext *s)
{
struct MD5Context *c = s->priv_data;
char buf[256];
av_strlcpy(buf, av_hash_get_name(c->hash), sizeof(buf) - 200);
av_strlcat(buf, "=", sizeof(buf) - 200);
md5_finish(s, buf);
av_hash_freep(&c->hash);
return 0;
}
AVOutputFormat ff_md5_muxer = {
.name = "md5",
.long_name = NULL_IF_CONFIG_SMALL("MD5 testing"),
.priv_data_size = sizeof(struct MD5Context),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = write_header,
.write_packet = write_packet,
.write_trailer = write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &md5enc_class,
};
#endif
#if CONFIG_FRAMEMD5_MUXER
static int framemd5_write_header(struct AVFormatContext *s)
{
struct MD5Context *c = s->priv_data;
int res = av_hash_alloc(&c->hash, c->hash_name);
if (res < 0)
return res;
avio_printf(s->pb, "#format: frame checksums\n");
avio_printf(s->pb, "#version: %d\n", c->format_version);
avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hash));
ff_framehash_write_header(s);
avio_printf(s->pb, "#stream#, dts, pts, duration, size, hash\n");
return 0;
}
static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
struct MD5Context *c = s->priv_data;
char buf[256];
av_hash_init(c->hash);
av_hash_update(c->hash, pkt->data, pkt->size);
snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8d, %8d, ",
pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
md5_finish(s, buf);
return 0;
}
static int framemd5_write_trailer(struct AVFormatContext *s)
{
struct MD5Context *c = s->priv_data;
av_hash_freep(&c->hash);
return 0;
}
static const AVClass framemd5_class = {
.class_name = "frame hash encoder class",
.item_name = av_default_item_name,
.option = hash_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_framemd5_muxer = {
.name = "framemd5",
.long_name = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
.priv_data_size = sizeof(struct MD5Context),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = framemd5_write_header,
.write_packet = framemd5_write_packet,
.write_trailer = framemd5_write_trailer,
.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
AVFMT_TS_NEGATIVE,
.priv_class = &framemd5_class,
};
#endif
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