1/*
2 *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef TEST_MD5_HELPER_H_
12#define TEST_MD5_HELPER_H_
13
14#include "./md5_utils.h"
15#include "vpx/vpx_decoder.h"
16
17namespace libvpx_test {
18class MD5 {
19 public:
20  MD5() {
21    MD5Init(&md5_);
22  }
23
24  void Add(const vpx_image_t *img) {
25    for (int plane = 0; plane < 3; ++plane) {
26      const uint8_t *buf = img->planes[plane];
27      // Calculate the width and height to do the md5 check. For the chroma
28      // plane, we never want to round down and thus skip a pixel so if
29      // we are shifting by 1 (chroma_shift) we add 1 before doing the shift.
30      // This works only for chroma_shift of 0 and 1.
31      const int h = plane ? (img->d_h + img->y_chroma_shift) >>
32                    img->y_chroma_shift : img->d_h;
33      const int w = plane ? (img->d_w + img->x_chroma_shift) >>
34                    img->x_chroma_shift : img->d_w;
35
36      for (int y = 0; y < h; ++y) {
37        MD5Update(&md5_, buf, w);
38        buf += img->stride[plane];
39      }
40    }
41  }
42
43  const char *Get(void) {
44    static const char hex[16] = {
45      '0', '1', '2', '3', '4', '5', '6', '7',
46      '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
47    };
48    uint8_t tmp[16];
49    MD5Context ctx_tmp = md5_;
50
51    MD5Final(tmp, &ctx_tmp);
52    for (int i = 0; i < 16; i++) {
53      res_[i * 2 + 0]  = hex[tmp[i] >> 4];
54      res_[i * 2 + 1]  = hex[tmp[i] & 0xf];
55    }
56    res_[32] = 0;
57
58    return res_;
59  }
60
61 protected:
62  char res_[33];
63  MD5Context md5_;
64};
65
66}  // namespace libvpx_test
67
68#endif  // TEST_MD5_HELPER_H_
69