Set LIMIT_FRAMES to 1 if supported.

[pulseview.git] / pv / toolbars / samplingbar.cpp

diff --git a/pv/toolbars/samplingbar.cpp b/pv/toolbars/samplingbar.cpp
index c57779c2f394bc546a4960631d9656bf63b5729a..80c822e2cf14b76a8e07d988c1a874725d3fc26b 100644 (file)
--- a/pv/toolbars/samplingbar.cpp
+++ b/pv/toolbars/samplingbar.cpp
@@ -53,6 +53,8 @@ SamplingBar::SamplingBar(SigSession &session, QWidget *parent) :
        _sample_count(" samples", this),
        _sample_rate("Hz", this),
        _updating_sample_rate(false),
+       _updating_sample_count(false),
+       _sample_count_supported(false),
        _icon_red(":/icons/status-red.svg"),
        _icon_green(":/icons/status-green.svg"),
        _icon_grey(":/icons/status-grey.svg"),
@@ -68,7 +70,6 @@ SamplingBar::SamplingBar(SigSession &session, QWidget *parent) :
                this, SLOT(on_sample_rate_changed()));
 
        _sample_count.show_min_max_step(0, UINT64_MAX, 1);
-       _sample_count.set_value(DefaultRecordLength);
 
        set_capture_state(pv::SigSession::Stopped);
 
@@ -126,11 +127,6 @@ void SamplingBar::set_selected_device(struct sr_dev_inst *const sdi)
                }
 }
 
-uint64_t SamplingBar::get_record_length() const
-{
-       return _sample_count.value();
-}
-
 void SamplingBar::set_capture_state(pv::SigSession::capture_state state)
 {
        const QIcon *icons[] = {&_icon_grey, &_icon_red, &_icon_green};
@@ -204,6 +200,31 @@ void SamplingBar::update_sample_rate_selector_value()
        _updating_sample_rate = false;
 }
 
+void SamplingBar::update_sample_count_selector()
+{
+       sr_dev_inst *const sdi = get_selected_device();
+       GVariant *gvar;
+       uint64_t samplecount = 0;
+
+       assert(sdi);
+
+       if (_sample_count_supported)
+               _sample_count.show_min_max_step(0, UINT64_MAX, 1);
+       else
+               _sample_count.show_none();
+
+       if (sr_config_get(sdi->driver, sdi, NULL,
+               SR_CONF_LIMIT_SAMPLES, &gvar) == SR_OK)
+       {
+               samplecount = g_variant_get_uint64(gvar);
+               g_variant_unref(gvar);
+       }
+
+       _updating_sample_count = true;
+       _sample_count.set_value(samplecount);
+       _updating_sample_count = false;
+}
+
 void SamplingBar::commit_sample_count()
 {
        uint64_t sample_count = 0;
@@ -242,13 +263,13 @@ void SamplingBar::commit_sample_rate()
 
 void SamplingBar::on_device_selected()
 {
+       GVariant *gvar;
+
        using namespace pv::popups;
 
        if (_updating_device_selector)
                return;
 
-       update_sample_rate_selector();
-
        sr_dev_inst *const sdi = get_selected_device();
        _session.set_device(sdi);
 
@@ -261,11 +282,44 @@ void SamplingBar::on_device_selected()
        // Update the probes popup
        Probes *const probes = new Probes(_session, this);
        _probes_button.set_popup(probes);
+
+       // Update supported options.
+       _sample_count_supported = false;
+
+       if (sr_config_list(sdi->driver, sdi, NULL,
+               SR_CONF_DEVICE_OPTIONS, &gvar) == SR_OK)
+       {
+               gsize num_opts;
+               const int *const options = (const int32_t *)g_variant_get_fixed_array(
+               gvar, &num_opts, sizeof(int32_t));
+               for (unsigned int i = 0; i < num_opts; i++)
+               {
+                       switch (options[i]) {
+                       case SR_CONF_LIMIT_SAMPLES:
+                               _sample_count_supported = true;
+                               break;
+                       case SR_CONF_LIMIT_FRAMES:
+                               sr_config_set(sdi, NULL, SR_CONF_LIMIT_FRAMES,
+                                       g_variant_new_uint64(1));
+                               break;
+                       }
+               }
+       }
+
+       // Update sweep timing widgets.
+       update_sample_count_selector();
+       update_sample_rate_selector();
+
+       if (_sample_count_supported && _sample_count.value() == 0) {
+               _sample_count.set_value(DefaultRecordLength);
+               commit_sample_count();
+       }
 }
 
 void SamplingBar::on_sample_count_changed()
 {
-       commit_sample_count();
+       if(!_updating_sample_count)
+               commit_sample_count();
 }
 
 void SamplingBar::on_sample_rate_changed()