]> git.sesse.net Git - ffmpeg/blob - libavformat/hashenc.c
Merge commit '4141a5a240fba44b4b4a1c488c279d7dd8a11ec7'
[ffmpeg] / libavformat / hashenc.c
1 /*
2  * Hash/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/intreadwrite.h"
26 #include "libavutil/opt.h"
27 #include "avformat.h"
28 #include "internal.h"
29
30 struct HashContext {
31     const AVClass *avclass;
32     struct AVHashContext *hash;
33     char *hash_name;
34     int format_version;
35 };
36
37 #define OFFSET(x) offsetof(struct HashContext, x)
38 #define ENC AV_OPT_FLAG_ENCODING_PARAM
39 #if CONFIG_HASH_MUXER || CONFIG_FRAMEHASH_MUXER
40 static const AVOption hash_options[] = {
41     { "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "sha256"}, 0, 0, ENC },
42     { "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC },
43     { NULL },
44 };
45 #endif
46
47 #if CONFIG_MD5_MUXER || CONFIG_FRAMEMD5_MUXER
48 static const AVOption md5_options[] = {
49     { "hash", "set hash to use", OFFSET(hash_name), AV_OPT_TYPE_STRING, {.str = "md5"}, 0, 0, ENC },
50     { "format_version", "file format version", OFFSET(format_version), AV_OPT_TYPE_INT, {.i64 = 2}, 1, 2, ENC },
51     { NULL },
52 };
53 #endif
54
55 #if CONFIG_HASH_MUXER || CONFIG_MD5_MUXER
56 static int hash_write_header(struct AVFormatContext *s)
57 {
58     struct HashContext *c = s->priv_data;
59     int res = av_hash_alloc(&c->hash, c->hash_name);
60     if (res < 0)
61         return res;
62     av_hash_init(c->hash);
63     return 0;
64 }
65
66 static int hash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
67 {
68     struct HashContext *c = s->priv_data;
69     av_hash_update(c->hash, pkt->data, pkt->size);
70     return 0;
71 }
72
73 static int hash_write_trailer(struct AVFormatContext *s)
74 {
75     struct HashContext *c = s->priv_data;
76     char buf[AV_HASH_MAX_SIZE*2+128];
77     snprintf(buf, sizeof(buf) - 200, "%s=", av_hash_get_name(c->hash));
78
79     av_hash_final_hex(c->hash, buf + strlen(buf), sizeof(buf) - strlen(buf));
80     av_strlcatf(buf, sizeof(buf), "\n");
81     avio_write(s->pb, buf, strlen(buf));
82     avio_flush(s->pb);
83
84     av_hash_freep(&c->hash);
85     return 0;
86 }
87 #endif
88
89 #if CONFIG_HASH_MUXER
90 static const AVClass hashenc_class = {
91     .class_name = "hash encoder class",
92     .item_name  = av_default_item_name,
93     .option     = hash_options,
94     .version    = LIBAVUTIL_VERSION_INT,
95 };
96
97 AVOutputFormat ff_hash_muxer = {
98     .name              = "hash",
99     .long_name         = NULL_IF_CONFIG_SMALL("Hash testing"),
100     .priv_data_size    = sizeof(struct HashContext),
101     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
102     .video_codec       = AV_CODEC_ID_RAWVIDEO,
103     .write_header      = hash_write_header,
104     .write_packet      = hash_write_packet,
105     .write_trailer     = hash_write_trailer,
106     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
107                          AVFMT_TS_NEGATIVE,
108     .priv_class        = &hashenc_class,
109 };
110 #endif
111
112 #if CONFIG_MD5_MUXER
113 static const AVClass md5enc_class = {
114     .class_name = "MD5 encoder class",
115     .item_name  = av_default_item_name,
116     .option     = md5_options,
117     .version    = LIBAVUTIL_VERSION_INT,
118 };
119
120 AVOutputFormat ff_md5_muxer = {
121     .name              = "md5",
122     .long_name         = NULL_IF_CONFIG_SMALL("MD5 testing"),
123     .priv_data_size    = sizeof(struct HashContext),
124     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
125     .video_codec       = AV_CODEC_ID_RAWVIDEO,
126     .write_header      = hash_write_header,
127     .write_packet      = hash_write_packet,
128     .write_trailer     = hash_write_trailer,
129     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
130                          AVFMT_TS_NEGATIVE,
131     .priv_class        = &md5enc_class,
132 };
133 #endif
134
135 #if CONFIG_FRAMEHASH_MUXER || CONFIG_FRAMEMD5_MUXER
136 static void framehash_print_extradata(struct AVFormatContext *s)
137 {
138     int i;
139
140     for (i = 0; i < s->nb_streams; i++) {
141         AVStream *st = s->streams[i];
142         AVCodecParameters *par = st->codecpar;
143         if (par->extradata) {
144             struct HashContext *c = s->priv_data;
145             char buf[AV_HASH_MAX_SIZE*2+1];
146
147             avio_printf(s->pb, "#extradata %d, %31d, ", i, par->extradata_size);
148             av_hash_init(c->hash);
149             av_hash_update(c->hash, par->extradata, par->extradata_size);
150             av_hash_final_hex(c->hash, buf, sizeof(buf));
151             avio_write(s->pb, buf, strlen(buf));
152             avio_printf(s->pb, "\n");
153         }
154     }
155 }
156
157 static int framehash_write_header(struct AVFormatContext *s)
158 {
159     struct HashContext *c = s->priv_data;
160     int res = av_hash_alloc(&c->hash, c->hash_name);
161     if (res < 0)
162         return res;
163     avio_printf(s->pb, "#format: frame checksums\n");
164     avio_printf(s->pb, "#version: %d\n", c->format_version);
165     avio_printf(s->pb, "#hash: %s\n", av_hash_get_name(c->hash));
166     framehash_print_extradata(s);
167     ff_framehash_write_header(s);
168     avio_printf(s->pb, "#stream#, dts,        pts, duration,     size, hash\n");
169     return 0;
170 }
171
172 static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
173 {
174     struct HashContext *c = s->priv_data;
175     char buf[AV_HASH_MAX_SIZE*2+128];
176     int len;
177     av_hash_init(c->hash);
178     av_hash_update(c->hash, pkt->data, pkt->size);
179
180     snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), "%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, ",
181              pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size);
182     len = strlen(buf);
183     av_hash_final_hex(c->hash, buf + len, sizeof(buf) - len);
184     avio_write(s->pb, buf, strlen(buf));
185
186     if (c->format_version > 1 && pkt->side_data_elems) {
187         int i, j;
188         avio_printf(s->pb, ", S=%d", pkt->side_data_elems);
189         for (i = 0; i < pkt->side_data_elems; i++) {
190             av_hash_init(c->hash);
191             if (HAVE_BIGENDIAN && pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
192                 for (j = 0; j < pkt->side_data[i].size; j += sizeof(uint32_t)) {
193                     uint32_t data = AV_RL32(pkt->side_data[i].data + j);
194                     av_hash_update(c->hash, (uint8_t *)&data, sizeof(uint32_t));
195                 }
196             } else
197                 av_hash_update(c->hash, pkt->side_data[i].data, pkt->side_data[i].size);
198             snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), ", %8d, ", pkt->side_data[i].size);
199             len = strlen(buf);
200             av_hash_final_hex(c->hash, buf + len, sizeof(buf) - len);
201             avio_write(s->pb, buf, strlen(buf));
202         }
203     }
204
205     avio_printf(s->pb, "\n");
206     avio_flush(s->pb);
207     return 0;
208 }
209
210 static int framehash_write_trailer(struct AVFormatContext *s)
211 {
212     struct HashContext *c = s->priv_data;
213     av_hash_freep(&c->hash);
214     return 0;
215 }
216 #endif
217
218 #if CONFIG_FRAMEHASH_MUXER
219 static const AVClass framehash_class = {
220     .class_name = "frame hash encoder class",
221     .item_name  = av_default_item_name,
222     .option     = hash_options,
223     .version    = LIBAVUTIL_VERSION_INT,
224 };
225
226 AVOutputFormat ff_framehash_muxer = {
227     .name              = "framehash",
228     .long_name         = NULL_IF_CONFIG_SMALL("Per-frame hash testing"),
229     .priv_data_size    = sizeof(struct HashContext),
230     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
231     .video_codec       = AV_CODEC_ID_RAWVIDEO,
232     .write_header      = framehash_write_header,
233     .write_packet      = framehash_write_packet,
234     .write_trailer     = framehash_write_trailer,
235     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
236                          AVFMT_TS_NEGATIVE,
237     .priv_class        = &framehash_class,
238 };
239 #endif
240
241 #if CONFIG_FRAMEMD5_MUXER
242 static const AVClass framemd5_class = {
243     .class_name = "frame hash encoder class",
244     .item_name  = av_default_item_name,
245     .option     = md5_options,
246     .version    = LIBAVUTIL_VERSION_INT,
247 };
248
249 AVOutputFormat ff_framemd5_muxer = {
250     .name              = "framemd5",
251     .long_name         = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing"),
252     .priv_data_size    = sizeof(struct HashContext),
253     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
254     .video_codec       = AV_CODEC_ID_RAWVIDEO,
255     .write_header      = framehash_write_header,
256     .write_packet      = framehash_write_packet,
257     .write_trailer     = framehash_write_trailer,
258     .flags             = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT |
259                          AVFMT_TS_NEGATIVE,
260     .priv_class        = &framemd5_class,
261 };
262 #endif