Import LappedTransform and friends.
Add code for doing block-based frequency domain processing. Developed
and reviewed in isolation. Corresponding export CL:
https://chromereviews.googleplex.com/95187013/
R=bercic@google.com, kjellander@webrtc.org, turaj@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/31539004
git-svn-id: http://webrtc.googlecode.com/svn/trunk@7359 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/interface/aligned_array.h b/webrtc/system_wrappers/interface/aligned_array.h
new file mode 100644
index 0000000..4b5c276
--- /dev/null
+++ b/webrtc/system_wrappers/interface/aligned_array.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
+#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
+
+#include "webrtc/base/checks.h"
+#include "webrtc/system_wrappers/interface/aligned_malloc.h"
+
+namespace webrtc {
+
+// Wrapper class for aligned arrays. Every row (and the first dimension) are
+// aligned to the given byte alignment.
+template<typename T> class AlignedArray {
+ public:
+ AlignedArray(int rows, int cols, int alignment)
+ : rows_(rows),
+ cols_(cols),
+ alignment_(alignment) {
+ CHECK_GT(alignment_, 0);
+ head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_),
+ alignment_));
+ for (int i = 0; i < rows_; ++i) {
+ head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_),
+ alignment_));
+ }
+ }
+
+ ~AlignedArray() {
+ for (int i = 0; i < rows_; ++i) {
+ AlignedFree(head_row_[i]);
+ }
+ AlignedFree(head_row_);
+ }
+
+ T* const* Array() {
+ return head_row_;
+ }
+
+ const T* const* Array() const {
+ return head_row_;
+ }
+
+ T* Row(int row) {
+ CHECK_LE(row, rows_);
+ return head_row_[row];
+ }
+
+ const T* Row(int row) const {
+ CHECK_LE(row, rows_);
+ return head_row_[row];
+ }
+
+ T& At(int row, int col) {
+ CHECK_LE(col, cols_);
+ return Row(row)[col];
+ }
+
+ const T& At(int row, int col) const {
+ CHECK_LE(col, cols_);
+ return Row(row)[col];
+ }
+
+ int rows() const {
+ return rows_;
+ }
+
+ int cols() const {
+ return cols_;
+ }
+
+ private:
+ int rows_;
+ int cols_;
+ int alignment_;
+ T** head_row_;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ALIGNED_ARRAY_
+