Notify custom UIs when designated LV2 BPM port changes

diff --git a/libs/ardour/ardour/lv2_plugin.h b/libs/ardour/ardour/lv2_plugin.h
index c6bf082e9add3501cd7baab3b7827c76dfabd6f7..d0c76a0e75b7b65b7d9e905221b66b50fab2fa2d 100644 (file)
--- a/libs/ardour/ardour/lv2_plugin.h
+++ b/libs/ardour/ardour/lv2_plugin.h
@@ -192,6 +192,7 @@ class LIBARDOUR_API LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
        double        _current_bpm;
        PBD::ID       _insert_id;
        std::string   _plugin_state_dir;
+       uint32_t      _bpm_control_port_index;
        uint32_t      _patch_port_in_index;
        uint32_t      _patch_port_out_index;
        URIMap&       _uri_map;

diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 757e1fa11da6e83799b6338b5dd66de624949271..12fc58a6cbd9307c402ed616a496d62a1199ec41 100644 (file)
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -356,6 +356,7 @@ LV2Plugin::LV2Plugin (AudioEngine& engine,
        , _worker(NULL)
        , _state_worker(NULL)
        , _insert_id("0")
+       , _bpm_control_port_index((uint32_t)-1)
        , _patch_port_in_index((uint32_t)-1)
        , _patch_port_out_index((uint32_t)-1)
        , _uri_map(URIMap::instance())
@@ -373,6 +374,7 @@ LV2Plugin::LV2Plugin (const LV2Plugin& other)
        , _worker(NULL)
        , _state_worker(NULL)
        , _insert_id(other._insert_id)
+       , _bpm_control_port_index((uint32_t)-1)
        , _patch_port_in_index((uint32_t)-1)
        , _patch_port_out_index((uint32_t)-1)
        , _uri_map(URIMap::instance())
@@ -759,6 +761,11 @@ LV2Plugin::init(const void* c_plugin, samplecnt_t rate)
        _impl->designated_input (LV2_TIME__beatsPerMinute, params, (void**)&_bpm_control_port);
        _impl->designated_input (LV2_CORE__freeWheeling, params, (void**)&_freewheel_control_port);
 
+       const LilvPort* bpmport = lilv_plugin_get_port_by_designation(plugin, _world.lv2_InputPort, _world.time_beatsPerMin);
+       if (bpmport) {
+               _bpm_control_port_index = lilv_port_get_index (plugin, bpmport);
+       }
+
        for (uint32_t i = 0; i < num_ports; ++i) {
                const LilvPort* port = lilv_plugin_get_port_by_index(plugin, i);
                const LilvNode* sym  = lilv_port_get_symbol(plugin, port);
@@ -2397,6 +2404,9 @@ LV2Plugin::set_automation_control (uint32_t i, boost::shared_ptr<AutomationContr
                DEBUG_TRACE(DEBUG::LV2Automate, string_compose ("Ctrl Port %1\n", i));
                _ctrl_map [i] = AutomationCtrlPtr (new AutomationCtrl(c));
        }
+       else if (i == _bpm_control_port_index) {
+               _ctrl_map [i] = AutomationCtrlPtr (new AutomationCtrl(c));
+       }
 }
 
 LV2Plugin::AutomationCtrlPtr
@@ -2577,7 +2587,15 @@ LV2Plugin::connect_and_run(BufferSet& bufs,
        }
 
        if (_bpm_control_port) {
-               *_bpm_control_port = tmap.tempo_at_sample (start).note_types_per_minute();
+               float bpm = tmap.tempo_at_sample (start).note_types_per_minute();
+               if (*_bpm_control_port != bpm) {
+                       AutomationCtrlPtr c = get_automation_control (_bpm_control_port_index);
+                       if (c && c->ac) {
+                               /* may be NULL for replicated instances - only one custom UI/ctrl */
+                               c->ac->Changed (false, Controllable::NoGroup); /* EMIT SIGNAL */
+                       }
+               }
+               *_bpm_control_port = bpm;
        }
 
 #ifdef LV2_EXTENDED