oslbackend: began new backend classes

app/render/backend/osl/oslbackend.cpp

@@ -0,0 +1,42 @@
+#include "oslbackend.h"
+
+#include <QEventLoop>
+#include <QThread>
+
+#include "oslworker.h"
+
+OSLBackend::OSLBackend(QObject *parent) :
+  VideoRenderBackend(parent)
+{
+}
+
+OSLBackend::~OSLBackend()
+{
+  Close();
+}
+
+bool OSLBackend::InitInternal()
+{
+  if (!VideoRenderBackend::InitInternal()) {
+    return false;
+  }
+
+  // Initiate one thread per CPU core
+  for (int i=0;i<threads().size();i++) {
+    // Create one processor object for each thread
+    OSLWorker* processor = new OSLWorker(frame_cache());
+    processor->SetParameters(params());
+    processors_.append(processor);
+  }
+
+  return true;
+}
+
+bool OSLBackend::CompileInternal()
+{
+  return true;
+}
+
+void OSLBackend::DecompileInternal()
+{
+}