LV2: add support for (de)activate in plugin wrapper.

The `activate` callback is called _before_ any audio processing begins.
This is a good place to initialize the plugin to a known good state.

The `deactivate` callback is called _after_ all audio processing is
finished. If any cleanup is needed, this is a good place to do so.

1 files changed, 5 insertions, 0 deletions

diff --git a/plugins/LV2/include/lv2plugin.h b/plugins/LV2/include/lv2plugin.h
index 46464a3..77b3996 100644
--- a/plugins/LV2/include/lv2plugin.h
+++ b/plugins/LV2/include/lv2plugin.h
@@ -12,6 +12,8 @@ public:
         : rate(frame_rate)
     {}
 
+    virtual ~LV2Plugin() {}
+
     void connect_port(uint32_t port, void * data)
     {
         if (port < nparams) {
@@ -33,6 +35,9 @@ public:
         return rate;
     }
 
+    virtual void activate() {}
+    virtual void deactivate() {}
+
     const float * params[nparams];
     const float * in[ninputs];
     float * out[noutputs];