+
+ const int w = viewport_->width();
+ if (w > 0) {
+ const double samplerate = session_.get_samplerate();
+ // Note: sample_num = time * samplerate
+ // Note: samples_per_pixel = samplerate * scale
+ int64_t start_sample = (offset_ * samplerate).convert_to<int64_t>();
+ int64_t end_sample = (offset_ * samplerate).convert_to<int64_t>() +
+ (w * session_.get_samplerate() * scale_);
+
+ MetadataObject* md_obj =
+ session_.metadata_obj_manager()->find_object_by_type(MetadataObjMainViewRange);
+ md_obj->set_value(MetadataValueStartSample, QVariant((qlonglong)start_sample));
+ md_obj->set_value(MetadataValueEndSample, QVariant((qlonglong)end_sample));
+ }
+