Changeset d37400c

Timestamp:

Sep 28, 2009, 9:19:40 PM (15 years ago)

Author:

Paul Brossier <piem@piem.org>

Branches:

feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+

Children:

6940b55

Parents:

fd6b90f

Message:

src/spectral/filterbank.c: move log10 to mfcc.c

Location:

src/spectral

Files:

• filterbank.c (modified) (2 diffs)
• mfcc.c (modified) (2 diffs)

src/spectral/filterbank.c

@@ -25 +25 @@
 #include "spectral/filterbank.h"
 #include "mathutils.h"
-
-#define VERY_SMALL_NUMBER 2e-42
 
 /** \brief A structure to store a set of n_filters filters of lenghts win_s */
@@ -79 +77 @@
         out->data[i][fn] += in->norm[i][j] * f->filters->data[fn][j];
       }
-
-      /* threshold to VERY_SMALL_NUMBER to avoid log oveflow */
-      out->data[i][fn] = MAX (VERY_SMALL_NUMBER, out->data[i][fn]);
-
-      /* compute logarithm */
-      out->data[i][fn] = LOG10 (out->data[i][fn]);
     }
   }

src/spectral/mfcc.c

@@ -23 +23 @@
 #include "fvec.h"
 #include "cvec.h"
+#include "mathutils.h"
 #include "spectral/fft.h"
 #include "spectral/filterbank_mel.h"
@@ -102 +103 @@
   aubio_filterbank_do (mf->fb, in, mf->in_dct);
 
+  /* compute log10 */
+  fvec_log10 (mf->in_dct);
+
+  /* raise power */
+  //vec_pow (mf->in_dct, 3.);
+
   /* zeros output */
   fvec_zeros(out);