LCOV - code coverage report
Current view: top level - libavutil/tests - murmur3.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 17 17 100.0 %
Date: 2017-10-18 21:45:51 Functions: 1 1 100.0 %

          Line data    Source code
       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             : 
      25           1 : int main(void)
      26             : {
      27             :     int i;
      28           1 :     uint8_t hash_result[16] = {0};
      29           1 :     struct AVMurMur3 *ctx = av_murmur3_alloc();
      30             : #if 1
      31           1 :     uint8_t in[256] = {0};
      32           1 :     uint8_t *hashes = av_mallocz(256 * 16);
      33         257 :     for (i = 0; i < 256; i++)
      34             :     {
      35         256 :         in[i] = i;
      36         256 :         av_murmur3_init_seeded(ctx, 256 - i);
      37             :         // Note: this actually tests hashing 0 bytes
      38         256 :         av_murmur3_update(ctx, in, i);
      39         256 :         av_murmur3_final(ctx, hashes + 16 * i);
      40             :     }
      41           1 :     av_murmur3_init_seeded(ctx, 0);
      42           1 :     av_murmur3_update(ctx, hashes, 256 * 16);
      43           1 :     av_murmur3_final(ctx, hash_result);
      44           1 :     av_free(hashes);
      45           1 :     av_freep(&ctx);
      46           1 :     printf("result: 0x%"PRIx64" 0x%"PRIx64"\n", AV_RL64(hash_result), AV_RL64(hash_result + 8));
      47             :     // official reference value is 32 bit
      48           1 :     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             : }

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