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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ | 11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ |
12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ | 12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ |
13 | 13 |
14 #include "webrtc/base/checks.h" | 14 #include "webrtc/base/checks.h" |
15 #include "webrtc/system_wrappers/include/aligned_malloc.h" | 15 #include "webrtc/system_wrappers/include/aligned_malloc.h" |
16 | 16 |
17 namespace webrtc { | 17 namespace webrtc { |
18 | 18 |
19 // Wrapper class for aligned arrays. Every row (and the first dimension) are | 19 // Wrapper class for aligned arrays. Every row (and the first dimension) are |
20 // aligned to the given byte alignment. | 20 // aligned to the given byte alignment. |
21 template<typename T> class AlignedArray { | 21 template<typename T> class AlignedArray { |
22 public: | 22 public: |
23 AlignedArray(int rows, size_t cols, size_t alignment) | 23 AlignedArray(size_t rows, size_t cols, size_t alignment) |
24 : rows_(rows), | 24 : rows_(rows), |
25 cols_(cols) { | 25 cols_(cols) { |
26 RTC_CHECK_GT(alignment, 0u); | 26 RTC_CHECK_GT(alignment, 0u); |
27 head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_), | 27 head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_), |
28 alignment)); | 28 alignment)); |
29 for (int i = 0; i < rows_; ++i) { | 29 for (size_t i = 0; i < rows_; ++i) { |
30 head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_), | 30 head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_), |
31 alignment)); | 31 alignment)); |
32 } | 32 } |
33 } | 33 } |
34 | 34 |
35 ~AlignedArray() { | 35 ~AlignedArray() { |
36 for (int i = 0; i < rows_; ++i) { | 36 for (size_t i = 0; i < rows_; ++i) { |
37 AlignedFree(head_row_[i]); | 37 AlignedFree(head_row_[i]); |
38 } | 38 } |
39 AlignedFree(head_row_); | 39 AlignedFree(head_row_); |
40 } | 40 } |
41 | 41 |
42 T* const* Array() { | 42 T* const* Array() { |
43 return head_row_; | 43 return head_row_; |
44 } | 44 } |
45 | 45 |
46 const T* const* Array() const { | 46 const T* const* Array() const { |
47 return head_row_; | 47 return head_row_; |
48 } | 48 } |
49 | 49 |
50 T* Row(int row) { | 50 T* Row(size_t row) { |
51 RTC_CHECK_LE(row, rows_); | 51 RTC_CHECK_LE(row, rows_); |
52 return head_row_[row]; | 52 return head_row_[row]; |
53 } | 53 } |
54 | 54 |
55 const T* Row(int row) const { | 55 const T* Row(size_t row) const { |
56 RTC_CHECK_LE(row, rows_); | 56 RTC_CHECK_LE(row, rows_); |
57 return head_row_[row]; | 57 return head_row_[row]; |
58 } | 58 } |
59 | 59 |
60 T& At(int row, size_t col) { | 60 T& At(size_t row, size_t col) { |
61 RTC_CHECK_LE(col, cols_); | 61 RTC_CHECK_LE(col, cols_); |
62 return Row(row)[col]; | 62 return Row(row)[col]; |
63 } | 63 } |
64 | 64 |
65 const T& At(int row, size_t col) const { | 65 const T& At(size_t row, size_t col) const { |
66 RTC_CHECK_LE(col, cols_); | 66 RTC_CHECK_LE(col, cols_); |
67 return Row(row)[col]; | 67 return Row(row)[col]; |
68 } | 68 } |
69 | 69 |
70 int rows() const { | 70 size_t rows() const { |
71 return rows_; | 71 return rows_; |
72 } | 72 } |
73 | 73 |
74 size_t cols() const { | 74 size_t cols() const { |
75 return cols_; | 75 return cols_; |
76 } | 76 } |
77 | 77 |
78 private: | 78 private: |
79 int rows_; | 79 size_t rows_; |
80 size_t cols_; | 80 size_t cols_; |
81 T** head_row_; | 81 T** head_row_; |
82 }; | 82 }; |
83 | 83 |
84 } // namespace webrtc | 84 } // namespace webrtc |
85 | 85 |
86 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ | 86 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_ |
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