Only allow monotonic devices in the device list

diff --git a/pv/dialogs/connect.cpp b/pv/dialogs/connect.cpp
index 03a03f26aed6c118fe6b7833a4dfabf47733b692..284ce07240c2a279d247252aac081cab66333d07 100644 (file)
--- a/pv/dialogs/connect.cpp
+++ b/pv/dialogs/connect.cpp
@@ -63,11 +63,30 @@ Connect::Connect(QWidget *parent) :
 
 void Connect::populate_drivers()
 {
+       const int *hwopts;
        struct sr_dev_driver **drivers = sr_driver_list();
-       for (int i = 0; drivers[i]; ++i)
-               _drivers.addItem(QString("%1 (%2)").arg(
-                       drivers[i]->longname).arg(drivers[i]->name),
-                       qVariantFromValue((void*)drivers[i]));
+       for (int i = 0; drivers[i]; ++i) {
+               /**
+                * We currently only support devices that can deliver
+                * samples at a fixed samplerate i.e. oscilloscopes and
+                * logic analysers.
+                * @todo Add support for non-monotonic devices i.e. DMMs
+                * and sensors.
+                */
+               bool supported_device = false;
+               if ((sr_config_list(drivers[i], SR_CONF_DEVICE_OPTIONS,
+                       (const void **)&hwopts, NULL) == SR_OK) && hwopts)
+                       for (int j = 0; hwopts[j]; j++)
+                               if(hwopts[j] == SR_CONF_SAMPLERATE) {
+                                       supported_device = true;
+                                       break;
+                               }
+
+               if(supported_device)
+                       _drivers.addItem(QString("%1 (%2)").arg(
+                               drivers[i]->longname).arg(drivers[i]->name),
+                               qVariantFromValue((void*)drivers[i]));
+       }
 }
 
 void Connect::device_selected(int index)