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() { MD5Init(&md5_); }
21
22  void Add(const vpx_image_t *img) {
23    for (int plane = 0; plane < 3; ++plane) {
24      const uint8_t *buf = img->planes[plane];
25      // Calculate the width and height to do the md5 check. For the chroma
26      // plane, we never want to round down and thus skip a pixel so if
27      // we are shifting by 1 (chroma_shift) we add 1 before doing the shift.
28      // This works only for chroma_shift of 0 and 1.
29      const int bytes_per_sample =
30          (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) ? 2 : 1;
31      const int h =
32          plane ? (img->d_h + img->y_chroma_shift) >> img->y_chroma_shift
33                : img->d_h;
34      const int w =
35          (plane ? (img->d_w + img->x_chroma_shift) >> img->x_chroma_shift
36                 : img->d_w) *
37          bytes_per_sample;
38
39      for (int y = 0; y < h; ++y) {
40        MD5Update(&md5_, buf, w);
41        buf += img->stride[plane];
42      }
43    }
44  }
45
46  void Add(const uint8_t *data, size_t size) {
47    MD5Update(&md5_, data, static_cast<uint32_t>(size));
48  }
49
50  const char *Get(void) {
51    static const char hex[16] = {
52      '0', '1', '2', '3', '4', '5', '6', '7',
53      '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
54    };
55    uint8_t tmp[16];
56    MD5Context ctx_tmp = md5_;
57
58    MD5Final(tmp, &ctx_tmp);
59    for (int i = 0; i < 16; i++) {
60      res_[i * 2 + 0] = hex[tmp[i] >> 4];
61      res_[i * 2 + 1] = hex[tmp[i] & 0xf];
62    }
63    res_[32] = 0;
64
65    return res_;
66  }
67
68 protected:
69  char res_[33];
70  MD5Context md5_;
71};
72
73}  // namespace libvpx_test
74
75#endif  // TEST_MD5_HELPER_H_
76