# HG changeset patch
# User Chris Cannam
# Date 1557414064 -3600
# Node ID b17fb3a4560ce7670d2ff7be36e7588a572d13b8
# Parent  81f50b70bdef645adff1adbbaf0567d69d26d388
Add haveRunningTransformers() and mutex

diff -r 81f50b70bdef -r b17fb3a4560c transform/ModelTransformerFactory.cpp
--- a/transform/ModelTransformerFactory.cpp	Tue May 07 15:52:12 2019 +0100
+++ b/transform/ModelTransformerFactory.cpp	Thu May 09 16:01:04 2019 +0100
@@ -34,6 +34,7 @@
 #include <set>
 
 #include <QRegExp>
+#include <QMutexLocker>
 
 using std::vector;
 
@@ -59,6 +60,8 @@
                                                       sv_frame_t duration,
                                                       UserConfigurator *configurator)
 {
+    QMutexLocker locker(&m_mutex);
+    
     ModelTransformer::Input input(nullptr);
 
     if (candidateInputModels.empty()) return input;
@@ -213,6 +216,8 @@
 {
     SVDEBUG << "ModelTransformerFactory::transformMultiple: Constructing transformer with input model " << input.getModel() << endl;
     
+    QMutexLocker locker(&m_mutex);
+    
     ModelTransformer *t = createTransformer(transforms, input);
     if (!t) return vector<Model *>();
 
@@ -255,6 +260,8 @@
 void
 ModelTransformerFactory::transformerFinished()
 {
+    QMutexLocker locker(&m_mutex);
+    
     QObject *s = sender();
     ModelTransformer *transformer = dynamic_cast<ModelTransformer *>(s);
     
@@ -299,17 +306,21 @@
 {
     TransformerSet affected;
 
-    for (TransformerSet::iterator i = m_runningTransformers.begin();
-         i != m_runningTransformers.end(); ++i) {
+    {
+        QMutexLocker locker(&m_mutex);
+    
+        for (TransformerSet::iterator i = m_runningTransformers.begin();
+             i != m_runningTransformers.end(); ++i) {
 
-        ModelTransformer *t = *i;
+            ModelTransformer *t = *i;
 
-        if (t->getInputModel() == m) {
-            affected.insert(t);
-        } else {
-            vector<Model *> mm = t->getOutputModels();
-            for (int i = 0; i < (int)mm.size(); ++i) {
-                if (mm[i] == m) affected.insert(t);
+            if (t->getInputModel() == m) {
+                affected.insert(t);
+            } else {
+                vector<Model *> mm = t->getOutputModels();
+                for (int i = 0; i < (int)mm.size(); ++i) {
+                    if (mm[i] == m) affected.insert(t);
+                }
             }
         }
     }
@@ -327,3 +338,10 @@
     }
 }
 
+bool
+ModelTransformerFactory::haveRunningTransformers() const
+{
+    QMutexLocker locker(&m_mutex);
+    
+    return (!m_runningTransformers.empty());
+}
diff -r 81f50b70bdef -r b17fb3a4560c transform/ModelTransformerFactory.h
--- a/transform/ModelTransformerFactory.h	Tue May 07 15:52:12 2019 +0100
+++ b/transform/ModelTransformerFactory.h	Thu May 09 16:01:04 2019 +0100
@@ -25,6 +25,7 @@
 #include <vamp-hostsdk/PluginBase.h>
 
 #include <QMap>
+#include <QMutex>
 #include <map>
 #include <set>
 #include <vector>
@@ -145,6 +146,8 @@
                                            QString &message,
                                            AdditionalModelHandler *handler = 0);
 
+    bool haveRunningTransformers() const;
+    
 signals:
     void transformFailed(QString transformName, QString message);
                                                                                
@@ -157,6 +160,8 @@
     ModelTransformer *createTransformer(const Transforms &transforms,
                                         const ModelTransformer::Input &input);
 
+    mutable QMutex m_mutex;
+    
     typedef std::map<TransformId, QString> TransformerConfigurationMap;
     TransformerConfigurationMap m_lastConfigurations;