From 0e30a1258ec8b620c238ac6a959d82b43d9fd2ee Mon Sep 17 00:00:00 2001
From: Paul Brossier <piem@piem.org>
Date: Sat, 17 Nov 2018 12:18:11 +0100
Subject: [PATCH] [filterbank] add norm and power parameters

---
 src/spectral/filterbank.c | 36 ++++++++++++++++++++++++++++++++++++
 src/spectral/filterbank.h |  8 ++++++++
 2 files changed, 44 insertions(+)

diff --git a/src/spectral/filterbank.c b/src/spectral/filterbank.c
index 0323700c..5497a4fd 100644
--- a/src/spectral/filterbank.c
+++ b/src/spectral/filterbank.c
@@ -23,6 +23,7 @@
 #include "fvec.h"
 #include "fmat.h"
 #include "cvec.h"
+#include "vecutils.h"
 #include "spectral/filterbank.h"
 #include "mathutils.h"
 
@@ -32,6 +33,8 @@ struct _aubio_filterbank_t
   uint_t win_s;
   uint_t n_filters;
   fmat_t *filters;
+  smpl_t norm;
+  smpl_t power;
 };
 
 aubio_filterbank_t *
@@ -45,6 +48,10 @@ new_aubio_filterbank (uint_t n_filters, uint_t win_s)
   /* allocate filter tables, a matrix of length win_s and of height n_filters */
   fb->filters = new_fmat (n_filters, win_s / 2 + 1);
 
+  fb->norm = 1;
+
+  fb->power = 1;
+
   return fb;
 }
 
@@ -67,6 +74,8 @@ aubio_filterbank_do (aubio_filterbank_t * f, const cvec_t * in, fvec_t * out)
   tmp.length = in->length;
   tmp.data = in->norm;
 
+  if (f->power != 1.) fvec_pow(&tmp, f->power);
+
   fmat_vecmul(f->filters, &tmp, out);
 
   return;
@@ -84,3 +93,30 @@ aubio_filterbank_set_coeffs (aubio_filterbank_t * f, const fmat_t * filter_coeff
   fmat_copy(filter_coeffs, f->filters);
   return 0;
 }
+
+uint_t
+aubio_filterbank_set_norm (aubio_filterbank_t *f, smpl_t norm)
+{
+  if (norm != 0 && norm != 1) return AUBIO_FAIL;
+  f->norm = norm;
+  return AUBIO_OK;
+}
+
+smpl_t
+aubio_filterbank_get_norm (aubio_filterbank_t *f)
+{
+  return f->norm;
+}
+
+uint_t
+aubio_filterbank_set_power (aubio_filterbank_t *f, smpl_t power)
+{
+  f->power = power;
+  return AUBIO_OK;
+}
+
+smpl_t
+aubio_filterbank_get_power (aubio_filterbank_t *f)
+{
+  return f->norm;
+}
diff --git a/src/spectral/filterbank.h b/src/spectral/filterbank.h
index 769b5e7a..714ea9d2 100644
--- a/src/spectral/filterbank.h
+++ b/src/spectral/filterbank.h
@@ -83,6 +83,14 @@ fmat_t *aubio_filterbank_get_coeffs (const aubio_filterbank_t * f);
  */
 uint_t aubio_filterbank_set_coeffs (aubio_filterbank_t * f, const fmat_t * filters);
 
+uint_t aubio_filterbank_set_norm (aubio_filterbank_t *f, smpl_t norm);
+
+smpl_t aubio_filterbank_get_norm (aubio_filterbank_t *f);
+
+uint_t aubio_filterbank_set_power (aubio_filterbank_t *f, smpl_t power);
+
+smpl_t aubio_filterbank_get_power (aubio_filterbank_t *f);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.11.0