summaryrefslogtreecommitdiffstats
path: root/libavformat/md5enc.c
blob: bd10df7bbcff62f77817fbe464a81b0349481706 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*
 * MD5 encoder (for codec/format testing)
 * Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; 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"
#include "internal.h"

struct MD5Context {
    struct AVMD5 *md5;
};

static void md5_finish(struct AVFormatContext *s, char *buf)
{
    struct MD5Context *c = s->priv_data;
    uint8_t md5[16];
    int i, offset = strlen(buf);
    av_md5_final(c->md5, 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)
{
    struct MD5Context *c = s->priv_data;
    c->md5 = av_md5_alloc();
    if (!c->md5)
        return AVERROR(ENOMEM);
    av_md5_init(c->md5);
    return 0;
}

static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
    struct MD5Context *c = s->priv_data;
    av_md5_update(c->md5, pkt->data, pkt->size);
    return 0;
}

static int write_trailer(struct AVFormatContext *s)
{
    struct MD5Context *c = s->priv_data;
    char buf[64] = "MD5=";

    md5_finish(s, buf);

    av_freep(&c->md5);
    return 0;
}

AVOutputFormat ff_md5_muxer = {
    .name              = "md5",
    .long_name         = NULL_IF_CONFIG_SMALL("MD5 testing"),
    .extensions        = "",
    .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_NOTIMESTAMPS,
};
#endif

#if CONFIG_FRAMEMD5_MUXER
static int framemd5_write_header(struct AVFormatContext *s)
{
    struct MD5Context *c = s->priv_data;
    c->md5 = av_md5_alloc();
    if (!c->md5)
        return AVERROR(ENOMEM);
    return ff_framehash_write_header(s);
}

static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
    struct MD5Context *c = s->priv_data;
    char buf[256];
    av_md5_init(c->md5);
    av_md5_update(c->md5, pkt->data, pkt->size);

    snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8"PRId64", %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_freep(&c->md5);
    return 0;
}

AVOutputFormat ff_framemd5_muxer = {
    .name              = "framemd5",
    .long_name         = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
    .extensions        = "",
    .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,
};
#endif
OpenPOWER on IntegriCloud