v1.0.0-rc.121 (#28)

This is an UNSTABLE release.

* jfjoch_broker: Report changes in the image buffer, so viewer doesn't reload constantly
* jfjoch_viewer: Improve performance of loading images
* jfjoch_viewer: Auto-throttle image loading in HTTP-sync / movie modes
* jfjoch_viewer: Auto-foreground calculated with histogram
* jfjoch_viewer: Fix rare segmentation fault

Reviewed-on: #28
Co-authored-by: Filip Leonarski <filip.leonarski@psi.ch>
Co-committed-by: Filip Leonarski <filip.leonarski@psi.ch>

common/ImageBuffer.cpp

@@ -70,6 +70,8 @@ void ImageBuffer::StartMeasurement(size_t in_location_size) {
         v.emplace_back();
         send_buffer_zero_copy_ret_val.emplace_back(GetBufferLocation(i),*this, i);
     }
+
+    ++counter;
 }
 
 void ImageBuffer::StartMeasurement(const DiffractionExperiment &experiment) {
@@ -120,7 +122,7 @@ int64_t ImageBuffer::GetAvailSlots() const {
 
 void ImageBuffer::ReleaseSlot(uint32_t location, int64_t image_number, size_t image_size, bool indexed) {
     std::unique_lock ul(m);
-
+    ++counter;
     zeromq_in_process--;
     v[location].zeromq_processing = false;
     v[location].image_number = image_number;
@@ -185,6 +187,8 @@ bool ImageBuffer::FinalizeInternal(std::unique_lock<std::mutex> &ul, std::chrono
         cv_zeromq_done.wait_for(ul, timeout,
             [this] {return zeromq_in_process == 0;
         });
+    ++counter;
+
     return (preview_in_process == 0) && (zeromq_in_process == 0);
 }
 
@@ -249,6 +253,7 @@ ImageBufferStatus ImageBuffer::GetStatus() const {
 
         ret.min_image_number = INT64_MAX;
         ret.max_image_number = 0;
+        ret.current_counter = counter;
 
         for (int i = 0; i < slot_count; i++) {
             if (v[i].image_number >= 0) {