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;
36 static void md5_finish(struct AVFormatContext *s, char *buf)
38 struct MD5Context *c = s->priv_data;
39 uint8_t md5[AV_HASH_MAX_SIZE];
40 int i, offset = strlen(buf);
41 int len = av_hash_get_size(c->hash);
42 av_assert0(len > 0 && len <= sizeof(md5));
43 av_hash_final(c->hash, md5);
44 for (i = 0; i < len; i++) {
45 snprintf(buf + offset, 3, "%02"PRIx8, md5[i]);
51 avio_write(s->pb, buf, strlen(buf));
55 #define OFFSET(x) offsetof(struct MD5Context, x)
56 #define ENC AV_OPT_FLAG_ENCODING_PARAM
57 static const AVOption hash_options[] = {
58 { "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "md5"}, 0, 0, ENC },
59 { "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 1}, 1, 1, ENC },
63 static const AVClass md5enc_class = {
64 .class_name = "hash encoder class",
65 .item_name = av_default_item_name,
66 .option = hash_options,
67 .version = LIBAVUTIL_VERSION_INT,
71 static int write_header(struct AVFormatContext *s)
73 struct MD5Context *c = s->priv_data;
74 int res = av_hash_alloc(&c->hash, c->hash_name);
77 av_hash_init(c->hash);
81 static int write_packet(struct AVFormatContext *s, AVPacket *pkt)
83 struct MD5Context *c = s->priv_data;
84 av_hash_update(c->hash, pkt->data, pkt->size);
88 static int write_trailer(struct AVFormatContext *s)
90 struct MD5Context *c = s->priv_data;
92 av_strlcpy(buf, av_hash_get_name(c->hash), sizeof(buf) - 200);
93 av_strlcat(buf, "=", sizeof(buf) - 200);
97 av_hash_freep(&c->hash);
101 AVOutputFormat ff_md5_muxer = {
103 .long_name = NULL_IF_CONFIG_SMALL("MD5 testing"),
104 .priv_data_size = sizeof(struct MD5Context),
105 .audio_codec = AV_CODEC_ID_PCM_S16LE,
106 .video_codec = AV_CODEC_ID_RAWVIDEO,
107 .write_header = write_header,
108 .write_packet = write_packet,
109 .write_trailer = write_trailer,
110 .flags = AVFMT_NOTIMESTAMPS,
111 .priv_class = &md5enc_class,
115 #if CONFIG_FRAMEMD5_MUXER
116 static int framemd5_write_header(struct AVFormatContext *s)
118 struct MD5Context *c = s->priv_data;
119 int res = av_hash_alloc(&c->hash, c->hash_name);
122 avio_printf(s->pb, "#format: frame checksums\n");
123 avio_printf(s->pb, "#version: %d\n", c->format_version);
124 avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hash));
125 ff_framehash_write_header(s);
126 avio_printf(s->pb, "#stream#, dts, pts, duration, size, hash\n");
130 static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
132 struct MD5Context *c = s->priv_data;
134 av_hash_init(c->hash);
135 av_hash_update(c->hash, pkt->data, pkt->size);
137 snprintf(buf, sizeof(buf) - 64, "%d, %10"PRId64", %10"PRId64", %8d, %8d, ",
138 pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
143 static int framemd5_write_trailer(struct AVFormatContext *s)
145 struct MD5Context *c = s->priv_data;
146 av_hash_freep(&c->hash);
150 static const AVClass framemd5_class = {
151 .class_name = "frame hash encoder class",
152 .item_name = av_default_item_name,
153 .option = hash_options,
154 .version = LIBAVUTIL_VERSION_INT,
157 AVOutputFormat ff_framemd5_muxer = {
159 .long_name = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
160 .priv_data_size = sizeof(struct MD5Context),
161 .audio_codec = AV_CODEC_ID_PCM_S16LE,
162 .video_codec = AV_CODEC_ID_RAWVIDEO,
163 .write_header = framemd5_write_header,
164 .write_packet = framemd5_write_packet,
165 .write_trailer = framemd5_write_trailer,
166 .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
168 .priv_class = &framemd5_class,