source: 3DVCSoftware/branches/HTM-7.0-Fix/source/Lib/TLibCommon/TComPicYuvMD5.cpp @ 458

Last change on this file since 458 was 56, checked in by hschwarz, 12 years ago

updated trunk (move to HM6.1)

  • Property svn:eol-style set to native
File size: 4.5 KB
Line 
1/* The copyright in this software is being made available under the BSD
2 * License, included below. This software may be subject to other third party
3 * and contributor rights, including patent rights, and no such rights are
4 * granted under this license.
5 *
6 * Copyright (c) 2010-2012, ITU/ISO/IEC
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 *  * Redistributions of source code must retain the above copyright notice,
13 *    this list of conditions and the following disclaimer.
14 *  * Redistributions in binary form must reproduce the above copyright notice,
15 *    this list of conditions and the following disclaimer in the documentation
16 *    and/or other materials provided with the distribution.
17 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
18 *    be used to endorse or promote products derived from this software without
19 *    specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include "TComPicYuv.h"
35#include "libmd5/MD5.h"
36
37//! \ingroup TLibCommon
38//! \{
39
40/**
41 * Update md5 using n samples from plane, each sample is adjusted to
42 * OUTBIT_BITDEPTH_DIV8.
43 */
44template<unsigned OUTPUT_BITDEPTH_DIV8>
45static void md5_block(MD5& md5, const Pel* plane, unsigned n)
46{
47  /* create a 64 byte buffer for packing Pel's into */
48  unsigned char buf[64/OUTPUT_BITDEPTH_DIV8][OUTPUT_BITDEPTH_DIV8];
49  for (unsigned i = 0; i < n; i++)
50  {
51    Pel pel = plane[i];
52    /* perform bitdepth and endian conversion */
53    for (unsigned d = 0; d < OUTPUT_BITDEPTH_DIV8; d++)
54    {
55      buf[i][d] = pel >> (d*8);
56    }
57  }
58  md5.update((unsigned char*)buf, n * OUTPUT_BITDEPTH_DIV8);
59}
60
61/**
62 * Update md5 with all samples in plane in raster order, each sample
63 * is adjusted to OUTBIT_BITDEPTH_DIV8.
64 */
65template<unsigned OUTPUT_BITDEPTH_DIV8>
66static void md5_plane(MD5& md5, const Pel* plane, unsigned width, unsigned height, unsigned stride)
67{
68  /* N is the number of samples to process per md5 update.
69   * All N samples must fit in buf */
70  unsigned N = 32;
71  unsigned width_modN = width % N;
72  unsigned width_less_modN = width - width_modN;
73
74  for (unsigned y = 0; y < height; y++)
75  {
76    /* convert pel's into unsigned chars in little endian byte order.
77     * NB, for 8bit data, data is truncated to 8bits. */
78    for (unsigned x = 0; x < width_less_modN; x += N)
79      md5_block<OUTPUT_BITDEPTH_DIV8>(md5, &plane[y*stride + x], N);
80
81    /* mop up any of the remaining line */
82    md5_block<OUTPUT_BITDEPTH_DIV8>(md5, &plane[y*stride + width_less_modN], width_modN);
83  }
84}
85
86/**
87 * Calculate the MD5sum of pic, storing the result in digest.
88 * MD5 calculation is performed on Y' then Cb, then Cr; each in raster order.
89 * Pel data is inserted into the MD5 function in little-endian byte order,
90 * using sufficient bytes to represent the picture bitdepth.  Eg, 10bit data
91 * uses little-endian two byte words; 8bit data uses single byte words.
92 */
93void calcMD5(TComPicYuv& pic, unsigned char digest[16])
94{
95  unsigned bitdepth = g_uiBitDepth + g_uiBitIncrement;
96  /* choose an md5_plane packing function based on the system bitdepth */
97  typedef void (*MD5PlaneFunc)(MD5&, const Pel*, unsigned, unsigned, unsigned);
98  MD5PlaneFunc md5_plane_func;
99  md5_plane_func = bitdepth <= 8 ? (MD5PlaneFunc)md5_plane<1> : (MD5PlaneFunc)md5_plane<2>;
100
101  MD5 md5;
102  unsigned width = pic.getWidth();
103  unsigned height = pic.getHeight();
104  unsigned stride = pic.getStride();
105
106  md5_plane_func(md5, pic.getLumaAddr(), width, height, stride);
107
108  width >>= 1;
109  height >>= 1;
110  stride >>= 1;
111
112  md5_plane_func(md5, pic.getCbAddr(), width, height, stride);
113  md5_plane_func(md5, pic.getCrAddr(), width, height, stride);
114
115  md5.finalize(digest);
116}
117//! \}
Note: See TracBrowser for help on using the repository browser.