2 * MD5 encoder (for codec/format testing)
3 * Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/hash.h"
25 #include "libavutil/opt.h"
30 const AVClass *avclass;
31 struct AVHashContext *hash;
35 static void md5_finish(struct AVFormatContext *s, char *buf)
37 struct MD5Context *c = s->priv_data;
38 uint8_t md5[AV_HASH_MAX_SIZE];
39 int i, offset = strlen(buf);
40 int len = av_hash_get_size(c->hash);
41 av_assert0(len > 0 && len <= sizeof(md5));
42 av_hash_final(c->hash, md5);
43 for (i = 0; i < len; i++) {
44 snprintf(buf + offset, 3, "%02"PRIx8, md5[i]);
50 avio_write(s->pb, buf, strlen(buf));
54 #define OFFSET(x) offsetof(struct MD5Context, x)
55 #define ENC AV_OPT_FLAG_ENCODING_PARAM
56 static const AVOption hash_options[] = {
57 { "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "md5"}, 0, 0, ENC },
61 static const AVClass md5enc_class = {
62 .class_name = "hash encoder class",
63 .item_name = av_default_item_name,
64 .option = hash_options,
65 .version = LIBAVUTIL_VERSION_INT,
69 static int write_header(struct AVFormatContext *s)
71 struct MD5Context *c = s->priv_data;
72 int res = av_hash_alloc(&c->hash, c->hash_name);
75 av_hash_init(c->hash);
79 static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
81 struct MD5Context *c = s->priv_data;
82 av_hash_update(c->hash, pkt->data, pkt->size);
86 static int write_trailer(struct AVFormatContext *s)
88 struct MD5Context *c = s->priv_data;
90 av_strlcpy(buf, av_hash_get_name(c->hash), sizeof(buf) - 200);
91 av_strlcat(buf, "=", sizeof(buf) - 200);
95 av_hash_freep(&c->hash);
99 AVOutputFormat ff_md5_muxer = {
101 .long_name = NULL_IF_CONFIG_SMALL("MD5 testing"),
102 .priv_data_size = sizeof(struct MD5Context),
103 .audio_codec = AV_CODEC_ID_PCM_S16LE,
104 .video_codec = AV_CODEC_ID_RAWVIDEO,
105 .write_header = write_header,
106 .write_packet = write_packet,
107 .write_trailer = write_trailer,
108 .flags = AVFMT_NOTIMESTAMPS,
109 .priv_class = &md5enc_class,
113 #if CONFIG_FRAMEMD5_MUXER
114 static int framemd5_write_header(struct AVFormatContext *s)
116 struct MD5Context *c = s->priv_data;
117 int res = av_hash_alloc(&c->hash, c->hash_name);
120 avio_printf(s->pb, "#format: frame checksums\n");
121 avio_printf(s->pb, "#version: 1\n");
122 avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hash));
123 ff_framehash_write_header(s);
124 avio_printf(s->pb, "#stream#, dts, pts, duration, size, hash\n");
128 static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
130 struct MD5Context *c = s->priv_data;
132 av_hash_init(c->hash);
133 av_hash_update(c->hash, pkt->data, pkt->size);
135 snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8d, %8d, ",
136 pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
141 static int framemd5_write_trailer(struct AVFormatContext *s)
143 struct MD5Context *c = s->priv_data;
144 av_hash_freep(&c->hash);
148 static const AVClass framemd5_class = {
149 .class_name = "frame hash encoder class",
150 .item_name = av_default_item_name,
151 .option = hash_options,
152 .version = LIBAVUTIL_VERSION_INT,
155 AVOutputFormat ff_framemd5_muxer = {
157 .long_name = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
158 .priv_data_size = sizeof(struct MD5Context),
159 .audio_codec = AV_CODEC_ID_PCM_S16LE,
160 .video_codec = AV_CODEC_ID_RAWVIDEO,
161 .write_header = framemd5_write_header,
162 .write_packet = framemd5_write_packet,
163 .write_trailer = framemd5_write_trailer,
164 .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
166 .priv_class = &framemd5_class,