Carla: Implement restore chunk data for bridges

c++/carla-backend/carla_bridge.cpp

@@ -706,6 +706,7 @@ public:
             if (chunkFile.open(QIODevice::ReadOnly))
             {
                 info.chunk = chunkFile.readAll();
+                chunkFile.close();
                 chunkFile.remove();
             }
 
@@ -777,9 +778,12 @@ public:
         Q_ASSERT(stringData);
 
         QString filePath;
-        filePath += "/tmp/.CarlaChunk_"; // FIXME - cross-platform
+        filePath  = QDir::tempPath();
+        filePath += "/.CarlaChunk_";
         filePath += m_name;
 
+        filePath = QDir::toNativeSeparators(filePath);
+
         QFile file(filePath);
 
         if (file.open(QIODevice::WriteOnly | QIODevice::Text))

c++/carla-backend/vst.cpp

@@ -1927,9 +1927,10 @@ public:
 #endif
 
         case audioMasterGetCurrentProcessLevel:
-            Q_ASSERT(self);
             if (self)
+            {
                 ret = self->handleAudioMasterGetCurrentProcessLevel();
+            }
             else
             {
                 qWarning("VstPlugin::hostCallback::audioMasterGetCurrentProcessLevel called without valid object");

c++/carla-bridge/carla_bridge_plugin.cpp

@@ -22,6 +22,7 @@
 
 #include <QtCore/QDir>
 #include <QtCore/QFile>
+#include <QtCore/QTextStream>
 #include <QtCore/QTimerEvent>
 #include <QtGui/QApplication>
 #include <QtGui/QDialog>
@@ -495,14 +496,10 @@ public:
         if (! plugin)
             return;
 
-        Q_UNUSED(filePath);
+        nextChunkFilePath = QString(filePath);
 
-#if 0
-        nextChunkFilePath = strdup(filePath);
-
-        while (nextChunkFilePath)
+        while (! nextChunkFilePath.isEmpty())
             carla_msleep(25);
-#endif
     }
 
     // ---------------------------------------------------------------------
@@ -599,6 +596,31 @@ protected:
 
         if (event->timerId() == msgTimer)
         {
+            if (! nextChunkFilePath.isEmpty())
+            {
+#ifdef Q_OS_WIN
+                if (nextChunkFilePath.startsWith("/"))
+                {
+                    // running under Wine, posix host
+                    nextChunkFilePath = nextChunkFilePath.replace(0, 1, "Z:/");
+                    nextChunkFilePath = QDir::toNativeSeparators(nextChunkFilePath);
+                }
+#endif
+                QFile chunkFile(nextChunkFilePath);
+
+                if (plugin && chunkFile.open(QIODevice::ReadOnly | QIODevice::Text))
+                {
+                    QTextStream in(&chunkFile);
+                    QString stringData(in.readAll());
+                    chunkFile.close();
+                    chunkFile.remove();
+
+                    plugin->setChunkData(stringData.toUtf8().constData());
+                }
+
+                nextChunkFilePath.clear();
+            }
+
             if (nextWidth > 0 && nextHeight > 0 && pluginGui)
             {
                 pluginGui->setNewSize(nextWidth, nextHeight);
@@ -625,6 +647,7 @@ protected:
 private:
     int msgTimer;
     int nextWidth, nextHeight;
+    QString nextChunkFilePath;
 
     CarlaBackend::CarlaEngine* engine;
     CarlaBackend::CarlaPlugin* plugin;