jfjoch_writer: Reserve all metadata vectors when opening file

writer/HDF5DataFilePluginROI.cpp

@@ -3,20 +3,31 @@
 
 #include "HDF5DataFilePluginROI.h"
 
-#define RESERVE_IMAGES 1000
+void HDF5DataFilePluginROI::OpenFile(HDF5File &data_file, const DataMessage &msg, size_t in_images_per_file) {
+    images_per_file = in_images_per_file;
 
-void HDF5DataFilePluginROI::OpenFile(HDF5File &data_file, const DataMessage &msg) {}
+    for (const auto &r: msg.roi) {
+        auto &entry = roi_data[r.first];
+        entry.max.reserve(images_per_file);
+        entry.sum.reserve(images_per_file);
+        entry.sum_sq.reserve(images_per_file);
+        entry.npixel.reserve(images_per_file);
+        entry.x.reserve(images_per_file);
+        entry.y.reserve(images_per_file);
+    }
+}
 
 void HDF5DataFilePluginROI::Write(const DataMessage &msg, uint64_t image_number) {
     for (const auto &r: msg.roi) {
         if (!roi_data.contains(r.first)) {
-            roi_data[r.first].max.reserve(RESERVE_IMAGES);
-            roi_data[r.first].sum.reserve(RESERVE_IMAGES);
-            roi_data[r.first].sum_sq.reserve(RESERVE_IMAGES);
-            roi_data[r.first].npixel.reserve(RESERVE_IMAGES);
-            roi_data[r.first].x.reserve(RESERVE_IMAGES);
-            roi_data[r.first].y.reserve(RESERVE_IMAGES);
+            roi_data[r.first].max.reserve(images_per_file);
+            roi_data[r.first].sum.reserve(images_per_file);
+            roi_data[r.first].sum_sq.reserve(images_per_file);
+            roi_data[r.first].npixel.reserve(images_per_file);
+            roi_data[r.first].x.reserve(images_per_file);
+            roi_data[r.first].y.reserve(images_per_file);
         }
+
         roi_data[r.first].max[image_number] = r.second.max_count;
         roi_data[r.first].sum[image_number] = r.second.sum;
         roi_data[r.first].npixel[image_number] = r.second.pixels;