comparison armadillo-3.900.4/include/armadillo_bits/glue_conv_meat.hpp @ 49:1ec0e2823891

Switch to using subrepo copies of qm-dsp, nnls-chroma, vamp-plugin-sdk; update Armadillo version; assume build without external BLAS/LAPACK

+// Copyright (C) 2010-2013 NICTA (www.nicta.com.au)
+// Copyright (C) 2010-2013 Conrad Sanderson
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+//! \addtogroup glue_conv
+//! @{
+
+
+//! rudimentary implementation of the convolution operation
+
+template<typename T1, typename T2>
+inline
+void
+glue_conv::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_conv>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const unwrap_check<T1> A_tmp(X.A, out);
+  const unwrap_check<T2> B_tmp(X.B, out);
+  
+  const Mat<eT>& A = A_tmp.M;
+  const Mat<eT>& B = B_tmp.M;
+  
+  arma_debug_check
+    (
+    ( ((A.is_vec() == false) && (A.is_empty() == false)) || ((B.is_vec() == false) && (B.is_empty() == false)) ),
+    "conv(): given object is not a vector"
+    );
+  
+  
+  const Mat<eT>& h = (A.n_elem <= B.n_elem) ? A : B;
+  const Mat<eT>& x = (A.n_elem <= B.n_elem) ? B : A;
+  
+  
+  const uword   h_n_elem = h.n_elem;
+  const uword   x_n_elem = x.n_elem;
+  const uword out_n_elem = h_n_elem + x_n_elem - 1;
+  
+  
+  if( (h_n_elem == 0) || (x_n_elem == 0) )
+    {
+    out.reset();
+    return;
+    }
+  
+  
+  (A.n_cols == 1) ? out.set_size(out_n_elem, 1) : out.set_size(1, out_n_elem);
+  
+  
+  const eT*   h_mem = h.memptr();
+  const eT*   x_mem = x.memptr();
+        eT* out_mem = out.memptr();
+  
+  
+  for(uword out_i = 0; out_i < (h_n_elem-1); ++out_i)
+    {
+    eT acc = eT(0);
+    
+    uword h_i = out_i;
+    
+    for(uword x_i = 0; x_i <= out_i; ++x_i, --h_i)
+      {
+      acc += h_mem[h_i] * x_mem[x_i];
+      }
+    
+    out_mem[out_i] = acc;
+    }
+  
+  
+  for(uword out_i = h_n_elem-1; out_i < out_n_elem - (h_n_elem-1); ++out_i)
+    {
+    eT acc = eT(0);
+   
+    uword h_i = h_n_elem - 1;
+    
+    for(uword x_i = out_i - h_n_elem + 1; x_i <= out_i; ++x_i, --h_i)
+      {
+      acc += h_mem[h_i] * x_mem[x_i];
+      }
+      
+    out_mem[out_i] = acc;
+    }
+  
+  
+  for(uword out_i = out_n_elem - (h_n_elem-1); out_i < out_n_elem; ++out_i)
+    {
+    eT acc = eT(0);
+    
+    uword h_i = h_n_elem - 1;
+    
+    for(uword x_i = out_i - h_n_elem + 1; x_i < x_n_elem; ++x_i, --h_i)
+      {
+      acc += h_mem[h_i] * x_mem[x_i];
+      }
+    
+    out_mem[out_i] = acc;
+    }
+  
+  
+  }
+
+
+
+//! @}