/* * Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/intreadwrite.h" #include "libavutil/mem.h" #include "libavutil/murmur3.h" int main(void) { int i; uint8_t hash_result[16] = {0}; struct AVMurMur3 *ctx = av_murmur3_alloc(); #if 1 uint8_t in[256] = {0}; uint8_t *hashes = av_mallocz(256 * 16); for (i = 0; i < 256; i++) { in[i] = i; av_murmur3_init_seeded(ctx, 256 - i); // Note: this actually tests hashing 0 bytes av_murmur3_update(ctx, in, i); av_murmur3_final(ctx, hashes + 16 * i); } av_murmur3_init_seeded(ctx, 0); av_murmur3_update(ctx, hashes, 256 * 16); av_murmur3_final(ctx, hash_result); av_free(hashes); av_freep(&ctx); printf("result: 0x%"PRIx64" 0x%"PRIx64"\n", AV_RL64(hash_result), AV_RL64(hash_result + 8)); // official reference value is 32 bit return AV_RL32(hash_result) != 0x6384ba69; #else uint8_t *in = av_mallocz(512*1024); av_murmur3_init(ctx); for (i = 0; i < 40*1024; i++) av_murmur3_update(ctx, in, 512*1024); av_murmur3_final(ctx, hash_result); av_free(in); return hash_result[0]; #endif }