diff options
Diffstat (limited to 'libs')
| -rw-r--r-- | libs/ardour/session_vst.cc | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libs/ardour/session_vst.cc b/libs/ardour/session_vst.cc index 46814ac4f1..404c297e8a 100644 --- a/libs/ardour/session_vst.cc +++ b/libs/ardour/session_vst.cc @@ -125,6 +125,23 @@ intptr_t Session::vst_callback ( // value is 0 for input and != 0 otherwise. note: the // return value is 0 for <true> such that older versions // will always return true. + if (!plug) { + return 1; + } + switch (value) { + case 0: + if (index < plug->numInputs) { + return 0; + } + break; + case 1: + if (index < plug->numOutputs) { + return 0; + } + break; + default: + break; + } return 1; case audioMasterWantMidi: |