Changeset a0fd4e4 for src

Timestamp:

Apr 2, 2005, 3:29:23 PM (20 years ago)

Author:

Paul Brossier <piem@altern.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:

cf7c76a

Parents:

e50b695

Message:

merge aubionotes and aubionotesmedian

add make_audio_plot to gnuplot.py
adds autocorrelation to mathutils
adds Makefile.in to junk files

Location:

src

Files:

• mathutils.c (modified) (1 diff)
• mathutils.h (modified) (1 diff)

src/mathutils.c

@@ -401 +401 @@
       return loudness;
 }
+
+void aubio_autocorr(fvec_t * input, fvec_t * output){
+        uint_t i = 0, j = 0, length = input->length;
+        smpl_t * data = input->data[0];
+        smpl_t * acf = output->data[0];
+        smpl_t tmp =0.;
+        for(i=0;i<length;i++){
+                for(j=i;j<length;j++){
+                        tmp += data[j-i]*data[j]; 
+                }
+                acf[i] = tmp/(length-i);
+                tmp = 0.0;
+        }
+}
+

src/mathutils.h

@@ -236 +236 @@
 uint_t aubio_silence_detection(fvec_t * ibuf, smpl_t threshold);
 smpl_t aubio_level_detection(fvec_t * ibuf, smpl_t threshold);
+/** 
+ * calculate normalised autocorrelation function
+ */
+void aubio_autocorr(fvec_t * input, fvec_t * output);
 
 #ifdef __cplusplus