From: Paul Brossier <piem@piem.org>
Date: Fri, 10 Mar 2017 19:16:28 +0000 (+0100)
Subject: src/musicutils.h: add fvec_clamp, basic limiter
X-Git-Tag: 0.4.5~20^2~32
X-Git-Url: https://git.aubio.org/?a=commitdiff_plain;h=b799241bdde98885bb18b0f2e2cc06b063eb2d13;p=aubio.git

src/musicutils.h: add fvec_clamp, basic limiter
---

diff --git a/src/mathutils.c b/src/mathutils.c
index 12cbe017..cd1b719c 100644
--- a/src/mathutils.c
+++ b/src/mathutils.c
@@ -297,6 +297,17 @@ void fvec_push(fvec_t *in, smpl_t new_elem) {
   in->data[in->length - 1] = new_elem;
 }
 
+void fvec_clamp(fvec_t *in, smpl_t absmax) {
+  uint_t i;
+  for (i = 0; i < in->length; i++) {
+    if (in->data[i] > 0 && in->data[i] > ABS(absmax)) {
+      in->data[i] = absmax;
+    } else if (in->data[i] < 0 && in->data[i] < -ABS(absmax)) {
+      in->data[i] = -absmax;
+    }
+  }
+}
+
 smpl_t
 aubio_level_lin (const fvec_t * f)
 {
diff --git a/src/musicutils.h b/src/musicutils.h
index f71d20ba..b3b266e4 100644
--- a/src/musicutils.h
+++ b/src/musicutils.h
@@ -156,6 +156,14 @@ uint_t aubio_silence_detection (const fvec_t * v, smpl_t threshold);
 */
 smpl_t aubio_level_detection (const fvec_t * v, smpl_t threshold);
 
+/** clamp the values of a vector within the range [-abs(max), abs(max)]
+
+  \param in vector to clamp
+  \param max maximum value over which input vector elements should be clamped
+
+*/
+void fvec_clamp(fvec_t *in, smpl_t absmax);
+
 #ifdef __cplusplus
 }
 #endif