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Side by Side Diff: webrtc/system_wrappers/interface/aligned_array.h

Issue 1413333002: system_wrappers: rename interface -> include (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Rebased again! Created 5 years, 1 month ago
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1 /*
2 * Copyright (c) 2014 The WebRTC 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 WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
12 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
13
14 #include "webrtc/base/checks.h"
15 #include "webrtc/system_wrappers/interface/aligned_malloc.h"
16
17 namespace webrtc {
18
19 // Wrapper class for aligned arrays. Every row (and the first dimension) are
20 // aligned to the given byte alignment.
21 template<typename T> class AlignedArray {
22 public:
23 AlignedArray(int rows, size_t cols, int alignment)
24 : rows_(rows),
25 cols_(cols),
26 alignment_(alignment) {
27 RTC_CHECK_GT(alignment_, 0);
28 head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_),
29 alignment_));
30 for (int i = 0; i < rows_; ++i) {
31 head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_),
32 alignment_));
33 }
34 }
35
36 ~AlignedArray() {
37 for (int i = 0; i < rows_; ++i) {
38 AlignedFree(head_row_[i]);
39 }
40 AlignedFree(head_row_);
41 }
42
43 T* const* Array() {
44 return head_row_;
45 }
46
47 const T* const* Array() const {
48 return head_row_;
49 }
50
51 T* Row(int row) {
52 RTC_CHECK_LE(row, rows_);
53 return head_row_[row];
54 }
55
56 const T* Row(int row) const {
57 RTC_CHECK_LE(row, rows_);
58 return head_row_[row];
59 }
60
61 T& At(int row, size_t col) {
62 RTC_CHECK_LE(col, cols_);
63 return Row(row)[col];
64 }
65
66 const T& At(int row, size_t col) const {
67 RTC_CHECK_LE(col, cols_);
68 return Row(row)[col];
69 }
70
71 int rows() const {
72 return rows_;
73 }
74
75 size_t cols() const {
76 return cols_;
77 }
78
79 private:
80 int rows_;
81 size_t cols_;
82 int alignment_;
83 T** head_row_;
84 };
85
86 } // namespace webrtc
87
88 #endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
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