From eeb1ef6275c976d594b6833cd853b2ccbae2d06b Mon Sep 17 00:00:00 2001
From: manu <manu@5fc3e0e6-29bc-4d03-b52b-c088cb822bde>
Date: Wed, 28 Nov 2007 15:15:01 +0000
Subject: [PATCH] testacqui.m changed in getdelay.m comments added in
 getdelay.m Plot replaced by histogram in getdelay.m

git-svn-id: http://svn.parisson.org/svn/CNAQ/trunk@123 5fc3e0e6-29bc-4d03-b52b-c088cb822bde
---
 tests/{testacqui.m => getdelay.asv} | 20 ++++++++---------
 tests/getdelay.m                    | 33 +++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 10 deletions(-)
 rename tests/{testacqui.m => getdelay.asv} (66%)
 create mode 100644 tests/getdelay.m

diff --git a/tests/testacqui.m b/tests/getdelay.asv
similarity index 66%
rename from tests/testacqui.m
rename to tests/getdelay.asv
index 9f18527..3e2617e 100644
--- a/tests/testacqui.m
+++ b/tests/getdelay.asv
@@ -1,12 +1,12 @@
-function testacqui(n)
+function [delai]=getdelay(n)
+%this function allows measuring the lattency of the playrecord process for
+%n generation/acquisition operations
+if nargin < 1, n = 10; end
 
-if nargin < 1, n = 50; end
-if n == 1, n=2; end
 %signal generation
-f_min=20;
+f_min=100;
 f_max=20000;
 lt=5;  
-
 t=0:1/44100:lt;
 sig=0.9*chirp(t,20,lt,20000,'logarithmic');
 len_sig = length(sig);
@@ -20,14 +20,14 @@ for it = 1:n
     delai(it)=I(it)-len_sig;
        
 end
+
 mfv=mode(delai);
 mfvt =num2str(mfv);
 sprintf('%s','the most frequent delay is ', mfvt,' samples.')
 
 %Plot results
-plot(delai);
-axis([1 n (min(delai)-2) (max(delai)+2)]);
-figure()
-plot(Y);
-axis([1 n min(Y) max(Y)]);
+hist(delai)
+title('delay distribution')
+xlabel('delay')
+
 
diff --git a/tests/getdelay.m b/tests/getdelay.m
new file mode 100644
index 0000000..3e2617e
--- /dev/null
+++ b/tests/getdelay.m
@@ -0,0 +1,33 @@
+function [delai]=getdelay(n)
+%this function allows measuring the lattency of the playrecord process for
+%n generation/acquisition operations
+if nargin < 1, n = 10; end
+
+%signal generation
+f_min=100;
+f_max=20000;
+lt=5;  
+t=0:1/44100:lt;
+sig=0.9*chirp(t,20,lt,20000,'logarithmic');
+len_sig = length(sig);
+
+%playrecord signal
+for it = 1:n
+        pause(0.1)
+    inputbuffer = pa_wavplayrecord(sig',1,[44100],0,[1],[1],1,['asio']);
+    Co=xcorr(inputbuffer',sig');
+    [Y(it),I(it)] = max(Co);
+    delai(it)=I(it)-len_sig;
+       
+end
+
+mfv=mode(delai);
+mfvt =num2str(mfv);
+sprintf('%s','the most frequent delay is ', mfvt,' samples.')
+
+%Plot results
+hist(delai)
+title('delay distribution')
+xlabel('delay')
+
+
-- 
2.39.5