Don't invalidate timeline/refresh monitor on audio effects

src/assets/model/assetparametermodel.cpp

@@ -43,6 +43,7 @@ AssetParameterModel::AssetParameterModel(std::unique_ptr<Mlt::Properties> asset,
     Q_ASSERT(m_asset->is_valid());
     QDomNodeList nodeList = assetXml.elementsByTagName(QStringLiteral("parameter"));
     m_hideKeyframesByDefault = assetXml.hasAttribute(QStringLiteral("hideKeyframes"));
+    m_isAudio = assetXml.attribute(QStringLiteral("type")) == QLatin1String("audio");
 
     bool needsLocaleConversion = false;
     QChar separator, oldSeparator;
@@ -187,10 +188,12 @@ void AssetParameterModel::setParameter(const QString &name, int value, bool upda
         emit dataChanged(index(0, 0), index(m_rows.count() - 1, 0), {});
         // Update fades in timeline
         pCore->updateItemModel(m_ownerId, m_assetId);
-        // Trigger monitor refresh
-        pCore->refreshProjectItem(m_ownerId);
-        // Invalidate timeline preview
-        pCore->invalidateItem(m_ownerId);
+        if (!m_isAudio) {
+            // Trigger monitor refresh
+            pCore->refreshProjectItem(m_ownerId);
+            // Invalidate timeline preview
+            pCore->invalidateItem(m_ownerId);
+        }
     }
 }
 
@@ -279,10 +282,12 @@ void AssetParameterModel::setParameter(const QString &name, const QString &param
     } else {
         // Update fades in timeline
         pCore->updateItemModel(m_ownerId, m_assetId);
-        // Trigger monitor refresh
-        pCore->refreshProjectItem(m_ownerId);
-        // Invalidate timeline preview
-        pCore->invalidateItem(m_ownerId);
+        if (!m_isAudio) {
+            // Trigger monitor refresh
+            pCore->refreshProjectItem(m_ownerId);
+            // Invalidate timeline preview
+            pCore->invalidateItem(m_ownerId);
+        }
     }
 }
 

src/assets/model/assetparametermodel.hpp

@@ -210,6 +210,8 @@ protected:
     std::shared_ptr<KeyframeModelList> m_keyframes;
     // if true, keyframe tools will be hidden by default
     bool m_hideKeyframesByDefault;
+    // true if this is an audio effect, used to prevent unnecessary monitor refresh / timeline invalidate
+    bool m_isAudio;
 
     /* @brief Set the parameter with given name to the given value. This should be called when first 
      *  building an effect in the constructor, so that we don't call shared_from_this