| 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 |