session: make sure signals set is initialized

[pulseview.git] / pv / session.cpp

diff --git a/pv/session.cpp b/pv/session.cpp
index e6fb52fd7dd0d589342ed877ee573cbb572a4755..0ac5bb7286dbe2cd6c76dbd07ca967ec2d289176 100644 (file)
--- a/pv/session.cpp
+++ b/pv/session.cpp
@@ -222,6 +222,25 @@ set< shared_ptr<data::SignalData> > Session::get_data() const
        return data;
 }
 
+double Session::get_samplerate() const
+{
+       double samplerate = 0.0;
+
+       for (const shared_ptr<pv::data::SignalData> d : get_data()) {
+               assert(d);
+               const vector< shared_ptr<pv::data::Segment> > segments =
+                       d->segments();
+               for (const shared_ptr<pv::data::Segment> &s : segments)
+                       samplerate = std::max(samplerate, s->samplerate());
+       }
+
+       // If there is no sample rate given we use samples as unit
+       if (samplerate == 0.0)
+               samplerate = 1.0;
+
+       return samplerate;
+}
+
 const unordered_set< shared_ptr<view::Signal> > Session::signals() const
 {
        shared_lock<shared_mutex> lock(signals_mutex_);
@@ -305,9 +324,14 @@ void Session::remove_decode_signal(view::DecodeTrace *signal)
 
 void Session::set_capture_state(capture_state state)
 {
-       lock_guard<mutex> lock(sampling_mutex_);
-       const bool changed = capture_state_ != state;
-       capture_state_ = state;
+       bool changed;
+
+       {
+               lock_guard<mutex> lock(sampling_mutex_);
+               changed = capture_state_ != state;
+               capture_state_ = state;
+       }
+
        if (changed)
                capture_state_changed(state);
 }
@@ -462,6 +486,11 @@ void Session::feed_in_meta(shared_ptr<Meta> meta)
        for (auto entry : meta->config()) {
                switch (entry.first->id()) {
                case SR_CONF_SAMPLERATE:
+                       // We can't rely on the header to always contain the sample rate,
+                       // so in case it's supplied via a meta packet, we use it.
+                       if (!cur_samplerate_)
+                               cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
+
                        /// @todo handle samplerate changes
                        break;
                default:
@@ -473,6 +502,27 @@ void Session::feed_in_meta(shared_ptr<Meta> meta)
        signals_changed();
 }
 
+void Session::feed_in_trigger()
+{
+       // The channel containing most samples should be most accurate
+       uint64_t sample_count = 0;
+
+       for (const shared_ptr<pv::data::SignalData> d : get_data()) {
+               assert(d);
+               uint64_t temp_count = 0;
+
+               const vector< shared_ptr<pv::data::Segment> > segments =
+                       d->segments();
+               for (const shared_ptr<pv::data::Segment> &s : segments)
+                       temp_count += s->get_sample_count();
+
+               if (temp_count > sample_count)
+                       sample_count = temp_count;
+       }
+
+       trigger_event(sample_count / get_samplerate());
+}
+
 void Session::feed_in_frame_begin()
 {
        if (cur_logic_segment_ || !cur_analog_segments_.empty())
@@ -529,6 +579,10 @@ void Session::feed_in_analog(shared_ptr<Analog> analog)
        const float *data = static_cast<const float *>(analog->data_pointer());
        bool sweep_beginning = false;
 
+       if (signals_.empty()) {
+               update_signals();
+       }
+
        for (auto channel : channels)
        {
                shared_ptr<data::AnalogSegment> segment;
@@ -597,6 +651,10 @@ void Session::data_feed_in(shared_ptr<sigrok::Device> device,
                feed_in_meta(dynamic_pointer_cast<Meta>(packet->payload()));
                break;
 
+       case SR_DF_TRIGGER:
+               feed_in_trigger();
+               break;
+
        case SR_DF_FRAME_BEGIN:
                feed_in_frame_begin();
                break;