From: Paul Brossier <piem@piem.org>
Date: Wed, 23 Sep 2009 16:37:24 +0000 (+0200)
Subject: src/spectral/filterbank*.c: reduce filterbank size to n/2+1, other half is always... 
X-Git-Tag: bzr2git~331
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=2062e489d684e82ec7cd5e0994fc39f96b353eb2;p=aubio.git

src/spectral/filterbank*.c: reduce filterbank size to n/2+1, other half is always empty
---

diff --git a/src/spectral/filterbank.c b/src/spectral/filterbank.c
index e97a18ec..97127b75 100644
--- a/src/spectral/filterbank.c
+++ b/src/spectral/filterbank.c
@@ -44,7 +44,7 @@ new_aubio_filterbank (uint_t n_filters, uint_t win_s)
   fb->n_filters = n_filters;
 
   /* allocate filter tables, an fvec of length win_s and of filter_cnt channel */
-  fb->filters = new_fvec (win_s, n_filters);
+  fb->filters = new_fvec (win_s / 2 + 1, n_filters);
 
   return fb;
 }
diff --git a/src/spectral/filterbank_mel.c b/src/spectral/filterbank_mel.c
index 9ee91248..5cdba18e 100644
--- a/src/spectral/filterbank_mel.c
+++ b/src/spectral/filterbank_mel.c
@@ -69,7 +69,7 @@ aubio_filterbank_set_mel_coeffs (aubio_filterbank_t * fb, fvec_t * freqs,
 
   /* fill fft_freqs lookup table, which assigns the frequency in hz to each bin */
   for (bin = 0; bin < win_s; bin++) {
-    fft_freqs->data[0][bin] = aubio_bintofreq (bin, samplerate, win_s);
+    fft_freqs->data[0][bin] = aubio_bintofreq (bin, samplerate, (win_s - 1) * 2);
   }
 
   /* zeroing of all filters */