Add carla_get_plugin_latency host function

Signed-off-by: falkTX <falktx@falktx.com>

source/backend/CarlaHost.h

@@ -893,6 +893,13 @@ CARLA_EXPORT float carla_get_current_parameter_value(CarlaHostHandle handle, uin
  */
 CARLA_EXPORT float carla_get_internal_parameter_value(CarlaHostHandle handle, uint pluginId, int32_t parameterId);
 
+/*!
+ * Get a plugin's internal latency, in samples.
+ * @param pluginId    Plugin
+ * @see InternalParameterIndex
+ */
+CARLA_EXPORT uint32_t carla_get_plugin_latency(CarlaHostHandle handle, uint pluginId);
+
 /*!
  * Get a plugin's peak values.
  * @param pluginId Plugin

source/backend/CarlaStandalone.cpp

@@ -1960,6 +1960,18 @@ float carla_get_internal_parameter_value(CarlaHostHandle handle, uint pluginId,
 
 // --------------------------------------------------------------------------------------------------------------------
 
+uint32_t carla_get_plugin_latency(CarlaHostHandle handle, uint pluginId)
+{
+    CARLA_SAFE_ASSERT_RETURN(handle->engine != nullptr, 0);
+
+    if (const CarlaPluginPtr plugin = handle->engine->getPlugin(pluginId))
+         return plugin->getLatency();
+
+    return 0;
+}
+
+// --------------------------------------------------------------------------------------------------------------------
+
 const float* carla_get_peak_values(CarlaHostHandle handle, uint pluginId)
 {
     CARLA_SAFE_ASSERT_RETURN(handle->engine != nullptr, nullptr);