1 /*
2 * Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/intreadwrite.h"
22 #include "libavutil/mem.h"
23 #include "libavutil/murmur3.h"
24
main(void)25 int main(void)
26 {
27 int i;
28 uint8_t hash_result[16] = {0};
29 struct AVMurMur3 *ctx = av_murmur3_alloc();
30 #if 1
31 uint8_t in[256] = {0};
32 uint8_t *hashes = av_mallocz(256 * 16);
33 for (i = 0; i < 256; i++)
34 {
35 in[i] = i;
36 av_murmur3_init_seeded(ctx, 256 - i);
37 // Note: this actually tests hashing 0 bytes
38 av_murmur3_update(ctx, in, i);
39 av_murmur3_final(ctx, hashes + 16 * i);
40 }
41 av_murmur3_init_seeded(ctx, 0);
42 av_murmur3_update(ctx, hashes, 256 * 16);
43 av_murmur3_final(ctx, hash_result);
44 av_free(hashes);
45 av_freep(&ctx);
46 printf("result: 0x%"PRIx64" 0x%"PRIx64"\n", AV_RL64(hash_result), AV_RL64(hash_result + 8));
47 // official reference value is 32 bit
48 return AV_RL32(hash_result) != 0x6384ba69;
49 #else
50 uint8_t *in = av_mallocz(512*1024);
51 av_murmur3_init(ctx);
52 for (i = 0; i < 40*1024; i++)
53 av_murmur3_update(ctx, in, 512*1024);
54 av_murmur3_final(ctx, hash_result);
55 av_free(in);
56 return hash_result[0];
57 #endif
58 }
59