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