Move Caffe simulation to a separate thread.

Teapot now shows pretty much instantly after starting the program, and
then only reappears when switching inputs.

src/fmri/main.cpp

@@ -17,39 +17,6 @@
 using namespace std;
 using namespace fmri;
 
-static void loadSimulationData(const Options &options)
-{
-    vector<vector<LayerData>> results;
-
-    auto dumper = options.imageDumper();
-    Simulator simulator(options.model(), options.weights(), options.means());
-
-    for (const auto &image : options.inputs()) {
-        results.emplace_back(simulator.simulate(image));
-    }
-
-    CHECK_GT(results.size(), 0) << "Should have some results" << endl;
-
-    if (dumper) {
-        for (auto &layer : *results.begin()) {
-            dumper->dump(layer);
-        }
-    }
-
-    const auto optLabels = options.labels();
-
-    if (optLabels) {
-        auto& labels = *optLabels;
-        for (const auto& result : results) {
-            auto &last = *result.rbegin();
-            auto bestIndex = std::distance(last.data(), max_element(last.data(), last.data() + last.numEntries()));
-            LOG(INFO) << "Got answer: " << labels[bestIndex] << endl;
-        }
-    }
-
-    RenderingState::instance().loadSimulationData(simulator.layerInfo(), std::move(results));
-}
-
 int main(int argc, char *argv[])
 {
     google::InitGoogleLogging(argv[0]);
@@ -64,7 +31,6 @@ int main(int argc, char *argv[])
     // Prepare data for simulations
     Options options(argc, argv);
     RenderingState::instance().loadOptions(options);
-    loadSimulationData(options);
 
     // Register callbacks
     glutReshapeFunc(changeWindowSize);