IO objects with no inputs have fixed, defined peak input power (-inf)

git-svn-id: svn://localhost/ardour2/trunk@1114 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/ardour/ardour/io.h b/libs/ardour/ardour/io.h
index 3090e213105bd6ce14e2de59f153108182fb80fd..eb332398da5e41d1ebe68cf2429c3d39e1fa920b 100644 (file)
--- a/libs/ardour/ardour/io.h
+++ b/libs/ardour/ardour/io.h
@@ -188,7 +188,9 @@ class IO : public PBD::StatefulDestructible
        /* Peak metering */
 
        float peak_input_power (uint32_t n) { 
-               if (n < std::max (_ninputs, _noutputs)) {
+               if (_ninputs == 0) {
+                       return minus_infinity();
+               } else if (n < std::max (_ninputs, _noutputs)) {
                        return _visible_peak_power[n];
                } else {
                        return minus_infinity();