spline interpolation: fix crash bugs on negative speed and NULL inputs

[ardour.git] / libs / ardour / session_process.cc

diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 8ab43df7212a7568547f253d85ff5889ed258e0e..2dd68744b4266c390e32a6e04a0791bcd5778d73 100644 (file)
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -325,8 +325,8 @@ Session::process_with_events (nframes_t nframes)
        if (_transport_speed == 1.0) {
                frames_moved = (long) nframes;
        } else {                
-               interpolation.set_target_speed (_target_transport_speed);
-               interpolation.set_speed (_transport_speed);
+               interpolation.set_target_speed (fabs(_target_transport_speed));
+               interpolation.set_speed (fabs(_transport_speed));
                frames_moved = (long) interpolation.interpolate (0, nframes, 0, 0);
        }
 
@@ -846,8 +846,8 @@ Session::process_without_events (nframes_t nframes)
        if (_transport_speed == 1.0) {
                frames_moved = (long) nframes;
        } else {                
-               interpolation.set_target_speed (_target_transport_speed);
-               interpolation.set_speed (_transport_speed);
+               interpolation.set_target_speed (fabs(_target_transport_speed));
+               interpolation.set_speed (fabs(_transport_speed));
                frames_moved = (long) interpolation.interpolate (0, nframes, 0, 0);
        }