MIDIClock_SlaveTest: simulate input jitter

git-svn-id: svn://localhost/ardour2/branches/3.0@6594 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 6 insertions, 3 deletions

diff --git a/libs/ardour/test/midi_clock_slave_test.cpp b/libs/ardour/test/midi_clock_slave_test.cpp
index a555558c3d..f953ae7851 100644
--- a/libs/ardour/test/midi_clock_slave_test.cpp
+++ b/libs/ardour/test/midi_clock_slave_test.cpp
@@ -23,11 +23,14 @@ MIDIClock_SlaveTest::testStepResponse ()
   nframes64_t start_time = 1000000;
   start (*parser, start_time);
 
-  update_midi_clock (*parser, start_time);      
+  update_midi_clock (*parser, start_time);
  
   for (nframes64_t i = 1; i<= 100 * period_size; i++) {
-    if (i % nframes64_t(one_ppqn_in_frames) == 0) {
-      update_midi_clock (*parser, start_time + i);      
+    // simulate jitter
+    nframes64_t input_delta = nframes64_t(one_ppqn_in_frames + 0.1 * (double(random()) / double (RAND_MAX)) * one_ppqn_in_frames);
+    
+    if (i % nframes64_t(input_delta) == 0) {
+      update_midi_clock (*parser, start_time + i);
     }
 
     if (i % period_size == 0) {