test/md5_helper.h

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 #ifndef TEST_MD5_HELPER_H_
  13 #define TEST_MD5_HELPER_H_
  14
  15 #include "./md5_utils.h"
  16 #include "aom/aom_decoder.h"
  17
  18 namespace libaom_test {
  19 class MD5 {
  20  public:
  21   MD5() { MD5Init(&md5_); }
  22
  23   void Add(const aom_image_t *img) {
  24     for (int plane = 0; plane < 3; ++plane) {
  25       const uint8_t *buf = img->planes[plane];
  26       // Calculate the width and height to do the md5 check. For the chroma
  27       // plane, we never want to round down and thus skip a pixel so if
  28       // we are shifting by 1 (chroma_shift) we add 1 before doing the shift.
  29       // This works only for chroma_shift of 0 and 1.
  30       const int bytes_per_sample =
  31           (img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 2 : 1;
  32       const int h =
  33           plane ? (img->d_h + img->y_chroma_shift) >> img->y_chroma_shift
  34                 : img->d_h;
  35       const int w =
  36           (plane ? (img->d_w + img->x_chroma_shift) >> img->x_chroma_shift
  37                  : img->d_w) *
  38           bytes_per_sample;
  39
  40       for (int y = 0; y < h; ++y) {
  41         MD5Update(&md5_, buf, w);
  42         buf += img->stride[plane];
  43       }
  44     }
  45   }
  46
  47   void Add(const uint8_t *data, size_t size) {
  48     MD5Update(&md5_, data, static_cast<uint32_t>(size));
  49   }
  50
  51   const char *Get(void) {
  52     static const char hex[16] = {
  53       '0', '1', '2', '3', '4', '5', '6', '7',
  54       '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
  55     };
  56     uint8_t tmp[16];
  57     MD5Context ctx_tmp = md5_;
  58
  59     MD5Final(tmp, &ctx_tmp);
  60     for (int i = 0; i < 16; i++) {
  61       res_[i * 2 + 0] = hex[tmp[i] >> 4];
  62       res_[i * 2 + 1] = hex[tmp[i] & 0xf];
  63     }
  64     res_[32] = 0;
  65
  66     return res_;
  67   }
  68
  69  protected:
  70   char res_[33];
  71   MD5Context md5_;
  72 };
  73
  74 }  // namespace libaom_test
  75
  76 #endif  // TEST_MD5_HELPER_H_