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1 | /* |
2 | * MD5 encoder (for codec/format testing) | |
3 | * Copyright (c) 2009 Reimar Döffinger, based on crcenc (c) 2002 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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 | |
20 | */ | |
21 | ||
22 | #include "libavutil/avassert.h" | |
23 | #include "libavutil/avstring.h" | |
24 | #include "libavutil/hash.h" | |
25 | #include "libavutil/opt.h" | |
26 | #include "avformat.h" | |
27 | #include "internal.h" | |
28 | ||
29 | struct MD5Context { | |
30 | const AVClass *avclass; | |
31 | struct AVHashContext *hash; | |
32 | char *hash_name; | |
33 | int format_version; | |
34 | }; | |
35 | ||
36 | static void md5_finish(struct AVFormatContext *s, char *buf) | |
37 | { | |
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]); | |
46 | offset += 2; | |
47 | } | |
48 | buf[offset] = '\n'; | |
49 | buf[offset+1] = 0; | |
50 | ||
51 | avio_write(s->pb, buf, strlen(buf)); | |
52 | avio_flush(s->pb); | |
53 | } | |
54 | ||
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 }, | |
60 | { NULL }, | |
61 | }; | |
62 | ||
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, | |
68 | }; | |
69 | ||
70 | #if CONFIG_MD5_MUXER | |
71 | static int write_header(struct AVFormatContext *s) | |
72 | { | |
73 | struct MD5Context *c = s->priv_data; | |
74 | int res = av_hash_alloc(&c->hash, c->hash_name); | |
75 | if (res < 0) | |
76 | return res; | |
77 | av_hash_init(c->hash); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int write_packet(struct AVFormatContext *s, AVPacket *pkt) | |
82 | { | |
83 | struct MD5Context *c = s->priv_data; | |
84 | av_hash_update(c->hash, pkt->data, pkt->size); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static int write_trailer(struct AVFormatContext *s) | |
89 | { | |
90 | struct MD5Context *c = s->priv_data; | |
91 | char buf[256]; | |
92 | av_strlcpy(buf, av_hash_get_name(c->hash), sizeof(buf) - 200); | |
93 | av_strlcat(buf, "=", sizeof(buf) - 200); | |
94 | ||
95 | md5_finish(s, buf); | |
96 | ||
97 | av_hash_freep(&c->hash); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | AVOutputFormat ff_md5_muxer = { | |
102 | .name = "md5", | |
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, | |
112 | }; | |
113 | #endif | |
114 | ||
115 | #if CONFIG_FRAMEMD5_MUXER | |
116 | static int framemd5_write_header(struct AVFormatContext *s) | |
117 | { | |
118 | struct MD5Context *c = s->priv_data; | |
119 | int res = av_hash_alloc(&c->hash, c->hash_name); | |
120 | if (res < 0) | |
121 | return res; | |
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"); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt) | |
131 | { | |
132 | struct MD5Context *c = s->priv_data; | |
133 | char buf[256]; | |
134 | av_hash_init(c->hash); | |
135 | av_hash_update(c->hash, pkt->data, pkt->size); | |
136 | ||
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); | |
139 | md5_finish(s, buf); | |
140 | return 0; | |
141 | } | |
142 | ||
143 | static int framemd5_write_trailer(struct AVFormatContext *s) | |
144 | { | |
145 | struct MD5Context *c = s->priv_data; | |
146 | av_hash_freep(&c->hash); | |
147 | return 0; | |
148 | } | |
149 | ||
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, | |
155 | }; | |
156 | ||
157 | AVOutputFormat ff_framemd5_muxer = { | |
158 | .name = "framemd5", | |
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 | | |
167 | AVFMT_TS_NEGATIVE, | |
168 | .priv_class = &framemd5_class, | |
169 | }; | |
170 | #endif |