1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* Copyright (C) 2015-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include <algorithm>
extern "C" {
#include <libswscale/swscale.h>
}
#include "PictureScalingAlgorithm.h"
#include "utils/StringUtils.h"
CPictureScalingAlgorithm::Algorithm CPictureScalingAlgorithm::Default = CPictureScalingAlgorithm::Bicubic;
CPictureScalingAlgorithm::AlgorithmMap CPictureScalingAlgorithm::m_algorithms = {
{ FastBilinear, { "fast_bilinear", SWS_FAST_BILINEAR } },
{ Bilinear, { "bilinear", SWS_BILINEAR } },
{ Bicubic, { "bicubic", SWS_BICUBIC } },
{ Experimental, { "experimental", SWS_X } },
{ NearestNeighbor, { "nearest_neighbor", SWS_POINT } },
{ AveragingArea, { "averaging_area", SWS_AREA } },
{ Bicublin, { "bicublin", SWS_BICUBLIN } },
{ Gaussian, { "gaussian", SWS_GAUSS } },
{ Sinc, { "sinc", SWS_SINC } },
{ Lanczos, { "lanczos", SWS_LANCZOS } },
{ BicubicSpline, { "bicubic_spline", SWS_SPLINE } },
};
CPictureScalingAlgorithm::Algorithm CPictureScalingAlgorithm::FromString(const std::string& scalingAlgorithm)
{
const auto& algorithm = std::find_if(m_algorithms.begin(), m_algorithms.end(),
[&scalingAlgorithm](const std::pair<Algorithm, ScalingAlgorithm>& algo) { return StringUtils::EqualsNoCase(algo.second.name, scalingAlgorithm); });
if (algorithm != m_algorithms.end())
return algorithm->first;
return NoAlgorithm;
}
std::string CPictureScalingAlgorithm::ToString(Algorithm scalingAlgorithm)
{
const auto& algorithm = m_algorithms.find(scalingAlgorithm);
if (algorithm != m_algorithms.end())
return algorithm->second.name;
return "";
}
int CPictureScalingAlgorithm::ToSwscale(const std::string& scalingAlgorithm)
{
return ToSwscale(FromString(scalingAlgorithm));
}
int CPictureScalingAlgorithm::ToSwscale(Algorithm scalingAlgorithm)
{
const auto& algorithm = m_algorithms.find(scalingAlgorithm);
if (algorithm != m_algorithms.end())
return algorithm->second.swscale;
return ToSwscale(Default);
}
|
