shithub: aubio

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ref: ee8a57c3905c9ce6bc5286dd0238d4fbc0c5b459
parent: 155cc10b5cde76184291c01fe8723328f0e36430
author: Paul Brossier <[email protected]>
date: Fri Mar 10 12:17:33 EST 2017

src/mathutils.h: add fvec_push

--- a/src/mathutils.c
+++ b/src/mathutils.c
@@ -289,6 +289,14 @@
   }
 }
 
+void fvec_push(fvec_t *in, smpl_t new_elem) {
+  uint_t i;
+  for (i = 0; i < in->length - 1; i++) {
+    in->data[i] = in->data[i + 1];
+  }
+  in->data[in->length - 1] = new_elem;
+}
+
 smpl_t
 aubio_level_lin (const fvec_t * f)
 {
--- a/src/mathutils.h
+++ b/src/mathutils.h
@@ -117,6 +117,17 @@
 */
 void fvec_ishift (fvec_t * v);
 
+/** push a new element to the end of a vector, erasing the first element and
+ * sliding all others
+
+  \param in vector to push to
+  \param new_elem new_element to add at the end of the vector
+
+  In numpy words, this is equivalent to: in = np.concatenate([in, [new_elem]])[1:]
+
+*/
+void fvec_push(fvec_t *in, smpl_t new_elem);
+
 /** compute the sum of all elements of a vector
 
   \param v vector to compute the sum of