diff armadillo-3.900.4/include/armadillo_bits/op_hist_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

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/armadillo-3.900.4/include/armadillo_bits/op_hist_meat.hpp	Thu Jun 13 10:25:24 2013 +0100
@@ -0,0 +1,82 @@
+// Copyright (C) 2012 NICTA (www.nicta.com.au)
+// Copyright (C) 2012 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 op_hist
+//! @{
+
+
+
+template<typename T1>
+inline
+void
+op_hist::apply(Mat<uword>& out, const mtOp<uword, T1, op_hist>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword n_bins = X.aux_uword_a;
+  
+  const unwrap_check_mixed<T1> tmp(X.m, out);
+  const Mat<eT>& A           = tmp.M;
+  
+  
+        uword A_n_elem = A.n_elem;
+  const eT*   A_mem    = A.memptr();
+  
+  eT min_val = priv::most_pos<eT>();
+  eT max_val = priv::most_neg<eT>();
+  
+  uword i,j;
+  for(i=0, j=1; j < A_n_elem; i+=2, j+=2)
+    {
+    const eT val_i = A_mem[i];
+    const eT val_j = A_mem[j];
+    
+    if(min_val > val_i) { min_val = val_i; }
+    if(min_val > val_j) { min_val = val_j; }
+      
+    if(max_val < val_i) { max_val = val_i; }
+    if(max_val < val_j) { max_val = val_j; }
+    }
+  
+  if(i < A_n_elem)
+    {
+    const eT val_i = A_mem[i];
+    
+    if(min_val > val_i) { min_val = val_i; }
+    if(max_val < val_i) { max_val = val_i; }
+    }
+  
+  if(arma_isfinite(min_val) == false) { min_val = priv::most_neg<eT>(); }
+  if(arma_isfinite(max_val) == false) { max_val = priv::most_pos<eT>(); }
+  
+  if(n_bins >= 1)
+    {
+    Col<eT> c(n_bins);
+    eT* c_mem = c.memptr();
+    
+    for(uword ii=0; ii < n_bins; ++ii)
+      {
+      c_mem[ii] = (0.5 + ii) / double(n_bins);   // TODO: may need to be modified for integer matrices
+      }
+    
+    c = ((max_val - min_val) * c) + min_val;
+    
+    out = hist(A, c);
+    }
+  else
+    {
+    out.reset();
+    }
+  }
+
+
+
+//! @}