Convert channel counts to size_t.

webrtc/modules/audio_processing/beamformer/matrix.h

 /*
  *  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.
  */
 
@@ skipping 49 matching lines @@
 //
 // If you pass in storage through the ctor, that storage is copied into the
 // matrix. TODO(claguna): albeit tricky, allow for data to be referenced
 // instead of copied, and owned by the user.
 template <typename T>
 class Matrix {
  public:
   Matrix() : num_rows_(0), num_columns_(0) {}
 
   // Allocates space for the elements and initializes all values to zero.
-  Matrix(int num_rows, int num_columns)
+  Matrix(size_t num_rows, size_t num_columns)
       : num_rows_(num_rows), num_columns_(num_columns) {
     Resize();
     scratch_data_.resize(num_rows_ * num_columns_);
     scratch_elements_.resize(num_rows_);
   }
 
   // Copies |data| into the new Matrix.
-  Matrix(const T* data, int num_rows, int num_columns)
+  Matrix(const T* data, size_t num_rows, size_t num_columns)
       : num_rows_(0), num_columns_(0) {
     CopyFrom(data, num_rows, num_columns);
     scratch_data_.resize(num_rows_ * num_columns_);
     scratch_elements_.resize(num_rows_);
   }
 
   virtual ~Matrix() {}
 
   // Deep copy an existing matrix.
   void CopyFrom(const Matrix& other) {
     CopyFrom(&other.data_[0], other.num_rows_, other.num_columns_);
   }
 
   // Copy |data| into the Matrix. The current data is lost.
-  void CopyFrom(const T* const data, int num_rows, int num_columns) {
+  void CopyFrom(const T* const data, size_t num_rows, size_t num_columns) {
     Resize(num_rows, num_columns);
     memcpy(&data_[0], data, num_rows_ * num_columns_ * sizeof(data_[0]));
   }
 
   Matrix& CopyFromColumn(const T* const* src,
                          size_t column_index,
-                         int num_rows) {
+                         size_t num_rows) {
     Resize(1, num_rows);
-    for (int i = 0; i < num_columns_; ++i) {
+    for (size_t i = 0; i < num_columns_; ++i) {
       data_[i] = src[i][column_index];
     }
 
     return *this;
   }
 
-  void Resize(int num_rows, int num_columns) {
+  void Resize(size_t num_rows, size_t num_columns) {
     if (num_rows != num_rows_ || num_columns != num_columns_) {
       num_rows_ = num_rows;
       num_columns_ = num_columns;
       Resize();
     }
   }
 
   // Accessors and mutators.
-  int num_rows() const { return num_rows_; }
-  int num_columns() const { return num_columns_; }
+  size_t num_rows() const { return num_rows_; }
+  size_t num_columns() const { return num_columns_; }
   T* const* elements() { return &elements_[0]; }
   const T* const* elements() const { return &elements_[0]; }
 
   T Trace() {
     RTC_CHECK_EQ(num_rows_, num_columns_);
 
     T trace = 0;
-    for (int i = 0; i < num_rows_; ++i) {
+    for (size_t i = 0; i < num_rows_; ++i) {
       trace += elements_[i][i];
     }
     return trace;
   }
 
   // Matrix Operations. Returns *this to support method chaining.
   Matrix& Transpose() {
     CopyDataToScratch();
     Resize(num_columns_, num_rows_);
     return Transpose(scratch_elements());
@@ skipping 137 matching lines @@
 
     CopyDataToScratch();
     Resize(num_rows_, rhs.num_columns_);
     return Multiply(scratch_elements(), rhs.num_rows_, rhs.elements());
   }
 
   std::string ToString() const {
     std::ostringstream ss;
     ss << std::endl << "Matrix" << std::endl;
 
-    for (int i = 0; i < num_rows_; ++i) {
-      for (int j = 0; j < num_columns_; ++j) {
+    for (size_t i = 0; i < num_rows_; ++i) {
+      for (size_t j = 0; j < num_columns_; ++j) {
         ss << elements_[i][j] << " ";
       }
       ss << std::endl;
     }
     ss << std::endl;
 
     return ss.str();
   }
 
  protected:
-  void SetNumRows(const int num_rows) { num_rows_ = num_rows; }
-  void SetNumColumns(const int num_columns) { num_columns_ = num_columns; }
+  void SetNumRows(const size_t num_rows) { num_rows_ = num_rows; }
+  void SetNumColumns(const size_t num_columns) { num_columns_ = num_columns; }
   T* data() { return &data_[0]; }
   const T* data() const { return &data_[0]; }
   const T* const* scratch_elements() const { return &scratch_elements_[0]; }
 
   // Resize the matrix. If an increase in capacity is required, the current
   // data is lost.
   void Resize() {
     size_t size = num_rows_ * num_columns_;
     data_.resize(size);
     elements_.resize(num_rows_);
 
-    for (int i = 0; i < num_rows_; ++i) {
+    for (size_t i = 0; i < num_rows_; ++i) {
       elements_[i] = &data_[i * num_columns_];
     }
   }
 
   // Copies data_ into scratch_data_ and updates scratch_elements_ accordingly.
   void CopyDataToScratch() {
     scratch_data_ = data_;
     scratch_elements_.resize(num_rows_);
 
-    for (int i = 0; i < num_rows_; ++i) {
+    for (size_t i = 0; i < num_rows_; ++i) {
       scratch_elements_[i] = &scratch_data_[i * num_columns_];
     }
   }
 
  private:
-  int num_rows_;
-  int num_columns_;
+  size_t num_rows_;
+  size_t num_columns_;
   std::vector<T> data_;
   std::vector<T*> elements_;
 
   // Stores temporary copies of |data_| and |elements_| for in-place operations
   // where referring to original data is necessary.
   std::vector<T> scratch_data_;
   std::vector<T*> scratch_elements_;
 
   // Helpers for Transpose and Multiply operations that unify in-place and
   // out-of-place solutions.
   Matrix& Transpose(const T* const* src) {
-    for (int i = 0; i < num_rows_; ++i) {
-      for (int j = 0; j < num_columns_; ++j) {
+    for (size_t i = 0; i < num_rows_; ++i) {
+      for (size_t j = 0; j < num_columns_; ++j) {
         elements_[i][j] = src[j][i];
       }
     }
 
     return *this;
   }
 
-  Matrix& Multiply(const T* const* lhs, int num_rows_rhs, const T* const* rhs) {
-    for (int row = 0; row < num_rows_; ++row) {
-      for (int col = 0; col < num_columns_; ++col) {
+  Matrix& Multiply(const T* const* lhs,
+                   size_t num_rows_rhs,
+                   const T* const* rhs) {
+    for (size_t row = 0; row < num_rows_; ++row) {
+      for (size_t col = 0; col < num_columns_; ++col) {
         T cur_element = 0;
-        for (int i = 0; i < num_rows_rhs; ++i) {
+        for (size_t i = 0; i < num_rows_rhs; ++i) {
           cur_element += lhs[row][i] * rhs[i][col];
         }
 
         elements_[row][col] = cur_element;
       }
     }
 
     return *this;
   }
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Matrix);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_MATRIX_H_