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Issue 2686763002: [Mojo Video Capture] Split OnIncomingCapturedVideoFrame() to OnNewBuffer() and OnFrameReadyInBuffer( (Closed)
Patch Set: rebase Created 3 years, 10 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_CLONE_EQUALS_UTIL_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_CLONE_EQUALS_UTIL_H_
7
8 #include <type_traits>
9 #include <unordered_map>
10 #include <vector>
11
12 #include "base/optional.h"
13 #include "mojo/public/cpp/bindings/lib/template_util.h"
14
15 namespace mojo {
16 namespace internal {
17
18 template <typename T>
19 struct HasCloneMethod {
20 template <typename U>
21 static char Test(decltype(&U::Clone));
22 template <typename U>
23 static int Test(...);
24 static const bool value = sizeof(Test<T>(0)) == sizeof(char);
25
26 private:
27 EnsureTypeIsComplete<T> check_t_;
28 };
29
30 template <typename T, bool has_clone_method = HasCloneMethod<T>::value>
31 struct CloneTraits;
32
33 template <typename T>
34 T Clone(const T& input);
35
36 template <typename T>
37 struct CloneTraits<T, true> {
38 static T Clone(const T& input) { return input.Clone(); }
39 };
40
41 template <typename T>
42 struct CloneTraits<T, false> {
43 static T Clone(const T& input) { return input; }
44 };
45
46 template <typename T>
47 struct CloneTraits<base::Optional<T>, false> {
48 static base::Optional<T> Clone(const base::Optional<T>& input) {
49 if (!input)
50 return base::nullopt;
51
52 return base::Optional<T>(internal::Clone(*input));
53 }
54 };
55
56 template <typename T>
57 struct CloneTraits<std::vector<T>, false> {
58 static std::vector<T> Clone(const std::vector<T>& input) {
59 std::vector<T> result;
60 result.reserve(input.size());
61 for (const auto& element : input)
62 result.push_back(internal::Clone(element));
63
64 return result;
65 }
66 };
67
68 template <typename K, typename V>
69 struct CloneTraits<std::unordered_map<K, V>, false> {
70 static std::unordered_map<K, V> Clone(const std::unordered_map<K, V>& input) {
71 std::unordered_map<K, V> result;
72 for (const auto& element : input) {
73 result.insert(std::make_pair(internal::Clone(element.first),
74 internal::Clone(element.second)));
75 }
76 return result;
77 }
78 };
79
80 template <typename T>
81 T Clone(const T& input) {
82 return CloneTraits<T>::Clone(input);
83 };
84
85 template <typename T>
86 struct HasEqualsMethod {
87 template <typename U>
88 static char Test(decltype(&U::Equals));
89 template <typename U>
90 static int Test(...);
91 static const bool value = sizeof(Test<T>(0)) == sizeof(char);
92
93 private:
94 EnsureTypeIsComplete<T> check_t_;
95 };
96
97 template <typename T, bool has_equals_method = HasEqualsMethod<T>::value>
98 struct EqualsTraits;
99
100 template <typename T>
101 bool Equals(const T& a, const T& b);
102
103 template <typename T>
104 struct EqualsTraits<T, true> {
105 static bool Equals(const T& a, const T& b) { return a.Equals(b); }
106 };
107
108 template <typename T>
109 struct EqualsTraits<T, false> {
110 static bool Equals(const T& a, const T& b) { return a == b; }
111 };
112
113 template <typename T>
114 struct EqualsTraits<base::Optional<T>, false> {
115 static bool Equals(const base::Optional<T>& a, const base::Optional<T>& b) {
116 if (!a && !b)
117 return true;
118 if (!a || !b)
119 return false;
120
121 return internal::Equals(*a, *b);
122 }
123 };
124
125 template <typename T>
126 struct EqualsTraits<std::vector<T>, false> {
127 static bool Equals(const std::vector<T>& a, const std::vector<T>& b) {
128 if (a.size() != b.size())
129 return false;
130 for (size_t i = 0; i < a.size(); ++i) {
131 if (!internal::Equals(a[i], b[i]))
132 return false;
133 }
134 return true;
135 }
136 };
137
138 template <typename K, typename V>
139 struct EqualsTraits<std::unordered_map<K, V>, false> {
140 static bool Equals(const std::unordered_map<K, V>& a,
141 const std::unordered_map<K, V>& b) {
142 if (a.size() != b.size())
143 return false;
144 for (const auto& element : a) {
145 auto iter = b.find(element.first);
146 if (iter == b.end() || !internal::Equals(element.second, iter->second))
147 return false;
148 }
149 return true;
150 }
151 };
152
153 template <typename T>
154 bool Equals(const T& a, const T& b) {
155 return EqualsTraits<T>::Equals(a, b);
156 }
157
158 } // namespace internal
159 } // namespace mojo
160
161 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_CLONE_EQUALS_UTIL_H_
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