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src/cvec.h: add cvec_logmag

--- a/src/cvec.c

+++ b/src/cvec.c

@@ -139,3 +139,10 @@

   cvec_norm_zeros(s);

   cvec_phas_zeros(s);

 }

+

+void cvec_logmag(cvec_t *s, smpl_t lambda) {

+  uint_t j;

+  for (j=0; j< s->length; j++) {

+    s->norm[j] = LOG(lambda * s->norm[j] + 1);

+  }

+}

--- a/src/cvec.h

+++ b/src/cvec.h

@@ -230,6 +230,14 @@

 */

 void cvec_zeros(cvec_t *s);

+/** take logarithmic magnitude

+

+  \param fftgrain cvec to compress

+  \param lambda value to use for normalisation

+

+*/

+void cvec_logmag(cvec_t *s, smpl_t lambda);

+

 #ifdef __cplusplus

 }

 #endif

-- 

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