Changeset fabb7cd for src/onsetdetection.c

Timestamp:

Nov 21, 2007, 12:01:22 PM (16 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:

862d78f

Parents:

ec2fa2a

Message:

onsetdection.{c,h}: add spectral flux (L2 norm, only energy increases)

File:

• src/onsetdetection.c (modified) (3 diffs)

src/onsetdetection.c

@@ -196 +196 @@
 }
 
+/* Spectral flux */
+void aubio_onsetdetection_specflux(aubio_onsetdetection_t *o, cvec_t * fftgrain, fvec_t * onset){ 
+  uint_t i, j;
+  for (i=0;i<fftgrain->channels;i++) {
+    onset->data[i][0] = 0.;
+    for (j=0;j<fftgrain->length;j++) {
+      if (fftgrain->norm[i][j] > o->oldmag->data[i][j])
+        onset->data[i][0] += fftgrain->norm[i][j] - o->oldmag->data[i][j];
+      o->oldmag->data[i][j] = fftgrain->norm[i][j];
+    }
+  }
+}
+
 /* Generic function pointing to the choosen one */
 void 
@@ -243 +256 @@
     case aubio_onset_kl:
     case aubio_onset_mkl:
+    case aubio_onset_specflux:
       o->oldmag = new_fvec(rsize,channels);
       break;
@@ -274 +288 @@
     case aubio_onset_mkl:
       o->funcpointer = aubio_onsetdetection_mkl;
+      break;
+    case aubio_onset_specflux:
+      o->funcpointer = aubio_onsetdetection_specflux;
       break;
     default: