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ffmpeg-4.2.2/libavutil/tests/hash.c 2 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * 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 <stdio.h>
  #include <string.h>
  
  #include "libavutil/hash.h"
  
  #define SRC_BUF_SIZE 64
  #define DST_BUF_SIZE (AV_HASH_MAX_SIZE * 8)
  
  int main(void)
  {
     struct AVHashContext *ctx = NULL;
     int i, j, numhashes = 0;
     static const uint8_t src[SRC_BUF_SIZE] = { 0 };
     uint8_t dst[DST_BUF_SIZE];
  
     while (av_hash_names(numhashes))
         numhashes++;
  
     for (i = 0; i < numhashes; i++) {
         if (av_hash_alloc(&ctx, av_hash_names(i)) < 0)
             return 1;
  
         av_hash_init(ctx);
         av_hash_update(ctx, src, SRC_BUF_SIZE);
         memset(dst, 0, DST_BUF_SIZE);
         av_hash_final_hex(ctx, dst, DST_BUF_SIZE);
         printf("%s hex: %s\n", av_hash_get_name(ctx), dst);
  
         av_hash_init(ctx);
         av_hash_update(ctx, src, SRC_BUF_SIZE);
         av_hash_final_bin(ctx, dst, DST_BUF_SIZE);
         printf("%s bin: ", av_hash_get_name(ctx));
         for (j = 0; j < av_hash_get_size(ctx); j++) {
             printf("%#x ", dst[j]);
         }
         printf("\n");
  
         av_hash_init(ctx);
         av_hash_update(ctx, src, SRC_BUF_SIZE);
         av_hash_final_b64(ctx, dst, DST_BUF_SIZE);
         printf("%s b64: %s\n", av_hash_get_name(ctx), dst);
         av_hash_freep(&ctx);
     }
     return 0;
  }