]> sigrok.org Git - pulseview.git/blobdiff - pv/view/decodetrace.cpp
Allow users to set initial pin states for decoders.
[pulseview.git] / pv / view / decodetrace.cpp
index 9e41bc4ac1f515f0a457ce2bff384820b040447e..9cc07d3377e5646c6191635714aa9dbc1420afc9 100644 (file)
@@ -14,8 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 extern "C" {
@@ -29,8 +28,6 @@ extern "C" {
 #include <tuple>
 
 #include <boost/functional/hash.hpp>
-#include <boost/thread/locks.hpp>
-#include <boost/thread/shared_mutex.hpp>
 
 #include <QAction>
 #include <QApplication>
@@ -43,37 +40,36 @@ extern "C" {
 
 #include "decodetrace.hpp"
 
-#include <pv/session.hpp>
-#include <pv/strnatcmp.hpp>
-#include <pv/data/decoderstack.hpp>
+#include <pv/data/decode/annotation.hpp>
 #include <pv/data/decode/decoder.hpp>
+#include <pv/data/decoderstack.hpp>
 #include <pv/data/logic.hpp>
 #include <pv/data/logicsegment.hpp>
-#include <pv/data/decode/annotation.hpp>
-#include <pv/view/logicsignal.hpp>
+#include <pv/session.hpp>
+#include <pv/strnatcmp.hpp>
 #include <pv/view/view.hpp>
 #include <pv/view/viewport.hpp>
 #include <pv/widgets/decodergroupbox.hpp>
 #include <pv/widgets/decodermenu.hpp>
 
-using boost::shared_lock;
-using boost::shared_mutex;
-using std::dynamic_pointer_cast;
+using std::all_of;
 using std::list;
-using std::lock_guard;
 using std::make_pair;
 using std::max;
 using std::make_pair;
 using std::map;
 using std::min;
+using std::out_of_range;
 using std::pair;
 using std::shared_ptr;
+using std::make_shared;
 using std::tie;
 using std::unordered_set;
 using std::vector;
 
 namespace pv {
-namespace view {
+namespace views {
+namespace TraceView {
 
 const QColor DecodeTrace::DecodeColours[4] = {
        QColor(0xEF, 0x29, 0x29),       // Red
@@ -129,25 +125,24 @@ const QColor DecodeTrace::OutlineColours[16] = {
 };
 
 DecodeTrace::DecodeTrace(pv::Session &session,
-       std::shared_ptr<pv::data::DecoderStack> decoder_stack, int index) :
-       Trace(QString::fromUtf8(
-               decoder_stack->stack().front()->decoder()->name)),
+       shared_ptr<data::SignalBase> signalbase, int index) :
+       Trace(signalbase),
        session_(session),
-       decoder_stack_(decoder_stack),
        row_height_(0),
        max_visible_rows_(0),
        delete_mapper_(this),
        show_hide_mapper_(this)
 {
-       assert(decoder_stack_);
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
 
        // Determine shortest string we want to see displayed in full
        QFontMetrics m(QApplication::font());
        min_useful_label_width_ = m.width("XX"); // e.g. two hex characters
 
-       set_colour(DecodeColours[index % countof(DecodeColours)]);
+       base_->set_name(QString::fromUtf8(decoder_stack->stack().front()->decoder()->name));
+       base_->set_colour(DecodeColours[index % countof(DecodeColours)]);
 
-       connect(decoder_stack_.get(), SIGNAL(new_decode_data()),
+       connect(decoder_stack.get(), SIGNAL(new_decode_data()),
                this, SLOT(on_new_decode_data()));
        connect(&delete_mapper_, SIGNAL(mapped(int)),
                this, SLOT(on_delete_decoder(int)));
@@ -160,9 +155,9 @@ bool DecodeTrace::enabled() const
        return true;
 }
 
-const std::shared_ptr<pv::data::DecoderStack>& DecodeTrace::decoder() const
+shared_ptr<data::SignalBase> DecodeTrace::base() const
 {
-       return decoder_stack_;
+       return base_;
 }
 
 pair<int, int> DecodeTrace::v_extents() const
@@ -175,22 +170,24 @@ pair<int, int> DecodeTrace::v_extents() const
        return make_pair(-row_height, row_height * row_count);
 }
 
-void DecodeTrace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
+void DecodeTrace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 {
        Trace::paint_back(p, pp);
        paint_axis(p, pp, get_visual_y());
 }
 
-void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
+void DecodeTrace::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 {
        using namespace pv::data::decode;
 
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
        const int text_height = ViewItemPaintParams::text_height();
        row_height_ = (text_height * 6) / 4;
        const int annotation_height = (text_height * 5) / 4;
 
-       assert(decoder_stack_);
-       const QString err = decoder_stack_->error_message();
+       assert(decoder_stack);
+       const QString err = decoder_stack->error_message();
        if (!err.isEmpty()) {
                draw_unresolved_period(
                        p, annotation_height, pp.left(), pp.right());
@@ -206,8 +203,7 @@ void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
        pair<uint64_t, uint64_t> sample_range = get_sample_range(
                pp.left(), pp.right());
 
-       assert(decoder_stack_);
-       const vector<Row> rows(decoder_stack_->get_visible_rows());
+       const vector<Row> rows(decoder_stack->get_visible_rows());
 
        visible_rows_.clear();
        for (const Row& row : rows) {
@@ -215,7 +211,7 @@ void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
                int row_title_width;
                try {
                        row_title_width = row_title_widths_.at(row);
-               } catch (std::out_of_range) {
+               } catch (out_of_range) {
                        const int w = p.boundingRect(QRectF(), 0, row.title()).width() +
                                RowTitleMargin;
                        row_title_widths_[row] = w;
@@ -230,7 +226,7 @@ void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
                base_colour >>= 16;
 
                vector<Annotation> annotations;
-               decoder_stack_->get_annotation_subset(annotations, row,
+               decoder_stack->get_annotation_subset(annotations, row,
                        sample_range.first, sample_range.second);
                if (!annotations.empty()) {
                        draw_annotations(annotations, p, annotation_height, pp, y,
@@ -245,11 +241,14 @@ void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
        // Draw the hatching
        draw_unresolved_period(p, annotation_height, pp.left(), pp.right());
 
+       if ((int)visible_rows_.size() > max_visible_rows_)
+               owner_->extents_changed(false, true);
+
        // Update the maximum row count if needed
-       max_visible_rows_ = std::max(max_visible_rows_, (int)visible_rows_.size());
+       max_visible_rows_ = max(max_visible_rows_, (int)visible_rows_.size());
 }
 
-void DecodeTrace::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
+void DecodeTrace::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 {
        using namespace pv::data::decode;
 
@@ -293,9 +292,11 @@ void DecodeTrace::populate_popup_form(QWidget *parent, QFormLayout *form)
 {
        using pv::data::decode::Decoder;
 
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
        assert(form);
        assert(parent);
-       assert(decoder_stack_);
+       assert(decoder_stack);
 
        // Add the standard options
        Trace::populate_popup_form(parent, form);
@@ -305,7 +306,7 @@ void DecodeTrace::populate_popup_form(QWidget *parent, QFormLayout *form)
        channel_selectors_.clear();
        decoder_forms_.clear();
 
-       const list< shared_ptr<Decoder> >& stack = decoder_stack_->stack();
+       const list< shared_ptr<Decoder> >& stack = decoder_stack->stack();
 
        if (stack.empty()) {
                QLabel *const l = new QLabel(
@@ -332,6 +333,7 @@ void DecodeTrace::populate_popup_form(QWidget *parent, QFormLayout *form)
        QPushButton *const stack_button =
                new QPushButton(tr("Stack Decoder"), parent);
        stack_button->setMenu(decoder_menu);
+       stack_button->setToolTip(tr("Stack a higher-level decoder on top of this one"));
 
        QHBoxLayout *stack_button_box = new QHBoxLayout;
        stack_button_box->addWidget(stack_button, 0, Qt::AlignRight);
@@ -436,8 +438,7 @@ void DecodeTrace::draw_annotation(const pv::data::decode::Annotation &a,
 
        const double start = a.start_sample() / samples_per_pixel -
                pixels_offset;
-       const double end = a.end_sample() / samples_per_pixel -
-               pixels_offset;
+       const double end = a.end_sample() / samples_per_pixel - pixels_offset;
 
        const size_t colour = (base_colour + a.format()) % countof(Colours);
        p.setPen(OutlineColours[colour]);
@@ -449,8 +450,7 @@ void DecodeTrace::draw_annotation(const pv::data::decode::Annotation &a,
        if (a.start_sample() == a.end_sample())
                draw_instant(a, p, h, start, y);
        else
-               draw_range(a, p, h, start, end, y, pp,
-                       row_title_width);
+               draw_range(a, p, h, start, end, y, pp, row_title_width);
 }
 
 void DecodeTrace::draw_annotation_block(
@@ -480,15 +480,21 @@ void DecodeTrace::draw_annotation_block(
        // Check if all annotations are of the same type (i.e. we can use one color)
        // or if we should use a neutral color (i.e. gray)
        const int format = annotations.front().format();
-       const bool single_format = std::all_of(
+       const bool single_format = all_of(
                annotations.begin(), annotations.end(),
                [&](const Annotation &a) { return a.format() == format; });
 
+       const QRectF rect(start, top, end - start, bottom - top);
+       const int r = h / 4;
+
+       p.setPen(QPen(Qt::NoPen));
+       p.setBrush(Qt::white);
+       p.drawRoundedRect(rect, r, r);
+
        p.setPen((single_format ? OutlineColours[colour] : Qt::gray));
        p.setBrush(QBrush((single_format ? Colours[colour] : Qt::gray),
                Qt::Dense4Pattern));
-       p.drawRoundedRect(
-               QRectF(start, top, end - start, bottom - top), h/4, h/4);
+       p.drawRoundedRect(rect, r, r);
 }
 
 void DecodeTrace::draw_instant(const pv::data::decode::Annotation &a, QPainter &p,
@@ -539,8 +545,8 @@ void DecodeTrace::draw_range(const pv::data::decode::Annotation &a, QPainter &p,
        const int ann_start = start + cap_width;
        const int ann_end = end - cap_width;
 
-       const int real_start = std::max(ann_start, pp.left() + row_title_width);
-       const int real_end = std::min(ann_end, pp.right());
+       const int real_start = max(ann_start, pp.left() + row_title_width);
+       const int real_end = min(ann_end, pp.right());
        const int real_width = real_end - real_start;
 
        QRectF rect(real_start, y - h / 2, real_width, h);
@@ -596,33 +602,34 @@ void DecodeTrace::draw_unresolved_period(QPainter &p, int h, int left,
 
        double samples_per_pixel, pixels_offset;
 
-       assert(decoder_stack_); 
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
+       assert(decoder_stack);
 
        shared_ptr<Logic> data;
-       shared_ptr<LogicSignal> logic_signal;
+       shared_ptr<data::SignalBase> signalbase;
 
-       const list< shared_ptr<Decoder> > &stack = decoder_stack_->stack();
+       const list< shared_ptr<Decoder> > &stack = decoder_stack->stack();
 
        // We get the logic data of the first channel in the list.
        // This works because we are currently assuming all
        // LogicSignals have the same data/segment
        for (const shared_ptr<Decoder> &dec : stack)
                if (dec && !dec->channels().empty() &&
-                       ((logic_signal = (*dec->channels().begin()).second)) &&
-                       ((data = logic_signal->logic_data())))
+                       ((signalbase = (*dec->channels().begin()).second)) &&
+                       ((data = signalbase->logic_data())))
                        break;
 
        if (!data || data->logic_segments().empty())
                return;
 
-       const shared_ptr<LogicSegment> segment =
-               data->logic_segments().front();
+       const shared_ptr<LogicSegment> segment = data->logic_segments().front();
        assert(segment);
        const int64_t sample_count = (int64_t)segment->get_sample_count();
        if (sample_count == 0)
                return;
 
-       const int64_t samples_decoded = decoder_stack_->samples_decoded();
+       const int64_t samples_decoded = decoder_stack->samples_decoded();
        if (sample_count == samples_decoded)
                return;
 
@@ -635,7 +642,7 @@ void DecodeTrace::draw_unresolved_period(QPainter &p, int h, int left,
                samples_per_pixel - pixels_offset, left - 1.0);
        const double end = min(sample_count / samples_per_pixel -
                pixels_offset, right + 1.0);
-       const QRectF no_decode_rect(start, y - h/2 + 0.5, end - start, h);
+       const QRectF no_decode_rect(start, y - (h / 2) + 0.5, end - start, h);
 
        p.setPen(QPen(Qt::NoPen));
        p.setBrush(Qt::white);
@@ -648,8 +655,10 @@ void DecodeTrace::draw_unresolved_period(QPainter &p, int h, int left,
 
 pair<double, double> DecodeTrace::get_pixels_offset_samples_per_pixel() const
 {
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
        assert(owner_);
-       assert(decoder_stack_);
+       assert(decoder_stack);
 
        const View *view = owner_->view();
        assert(view);
@@ -658,9 +667,9 @@ pair<double, double> DecodeTrace::get_pixels_offset_samples_per_pixel() const
        assert(scale > 0);
 
        const double pixels_offset =
-               ((view->offset() - decoder_stack_->start_time()) / scale).convert_to<double>();
+               ((view->offset() - decoder_stack->start_time()) / scale).convert_to<double>();
 
-       double samplerate = decoder_stack_->samplerate();
+       double samplerate = decoder_stack->samplerate();
 
        // Show sample rate as 1Hz when it is unknown
        if (samplerate == 0.0)
@@ -718,8 +727,10 @@ const QString DecodeTrace::get_annotation_at_point(const QPoint &point)
 
        vector<pv::data::decode::Annotation> annotations;
 
-       assert(decoder_stack_);
-       decoder_stack_->get_annotation_subset(annotations, visible_rows_[row],
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
+       assert(decoder_stack);
+       decoder_stack->get_annotation_subset(annotations, visible_rows_[row],
                sample_range.first, sample_range.second);
 
        return (annotations.empty()) ?
@@ -779,7 +790,10 @@ void DecodeTrace::create_decoder_form(int index,
 
        pv::widgets::DecoderGroupBox *const group =
                new pv::widgets::DecoderGroupBox(
-                       QString::fromUtf8(decoder->name), nullptr, decoder_deletable);
+                       QString::fromUtf8(decoder->name),
+                       tr("%1:\n%2").arg(QString::fromUtf8(decoder->longname),
+                               QString::fromUtf8(decoder->desc)),
+                       nullptr, decoder_deletable);
        group->set_decoder_visible(dec->shown());
 
        if (decoder_deletable) {
@@ -798,14 +812,24 @@ void DecodeTrace::create_decoder_form(int index,
        for (l = decoder->channels; l; l = l->next) {
                const struct srd_channel *const pdch =
                        (struct srd_channel *)l->data;
+
                QComboBox *const combo = create_channel_selector(parent, dec, pdch);
+               QComboBox *const combo_initial_pin = create_channel_selector_initial_pin(parent, dec, pdch);
+
                connect(combo, SIGNAL(currentIndexChanged(int)),
                        this, SLOT(on_channel_selected(int)));
+               connect(combo_initial_pin, SIGNAL(currentIndexChanged(int)),
+                       this, SLOT(on_initial_pin_selected(int)));
+
+               QHBoxLayout *const hlayout = new QHBoxLayout;
+               hlayout->addWidget(combo);
+               hlayout->addWidget(combo_initial_pin);
+
                decoder_form->addRow(tr("<b>%1</b> (%2) *")
                        .arg(QString::fromUtf8(pdch->name),
-                            QString::fromUtf8(pdch->desc)), combo);
+                            QString::fromUtf8(pdch->desc)), hlayout);
 
-               const ChannelSelector s = {combo, dec, pdch};
+               const ChannelSelector s = {combo, combo_initial_pin, dec, pdch};
                channel_selectors_.push_back(s);
        }
 
@@ -813,20 +837,32 @@ void DecodeTrace::create_decoder_form(int index,
        for (l = decoder->opt_channels; l; l = l->next) {
                const struct srd_channel *const pdch =
                        (struct srd_channel *)l->data;
+
                QComboBox *const combo = create_channel_selector(parent, dec, pdch);
+               QComboBox *const combo_initial_pin = create_channel_selector_initial_pin(parent, dec, pdch);
+
                connect(combo, SIGNAL(currentIndexChanged(int)),
                        this, SLOT(on_channel_selected(int)));
+               connect(combo_initial_pin, SIGNAL(currentIndexChanged(int)),
+                       this, SLOT(on_initial_pin_selected(int)));
+
+               QHBoxLayout *const hlayout = new QHBoxLayout;
+               hlayout->addWidget(combo);
+               hlayout->addWidget(combo_initial_pin);
+
                decoder_form->addRow(tr("<b>%1</b> (%2)")
                        .arg(QString::fromUtf8(pdch->name),
-                            QString::fromUtf8(pdch->desc)), combo);
+                            QString::fromUtf8(pdch->desc)), hlayout);
 
-               const ChannelSelector s = {combo, dec, pdch};
+               const ChannelSelector s = {combo, combo_initial_pin, dec, pdch};
                channel_selectors_.push_back(s);
        }
 
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
        // Add the options
        shared_ptr<binding::Decoder> binding(
-               new binding::Decoder(decoder_stack_, dec));
+               new binding::Decoder(decoder_stack, dec));
        binding->add_properties_to_form(decoder_form, true);
 
        bindings_.push_back(binding);
@@ -841,15 +877,15 @@ QComboBox* DecodeTrace::create_channel_selector(
 {
        assert(dec);
 
-       const auto sigs(session_.signals());
+       const auto sigs(session_.signalbases());
 
-       vector< shared_ptr<Signal> > sig_list(sigs.begin(), sigs.end());
-       std::sort(sig_list.begin(), sig_list.end(),
-               [](const shared_ptr<Signal> &a, const shared_ptr<Signal> b) {
+       vector< shared_ptr<data::SignalBase> > sig_list(sigs.begin(), sigs.end());
+       sort(sig_list.begin(), sig_list.end(),
+               [](const shared_ptr<data::SignalBase> &a,
+               const shared_ptr<data::SignalBase> &b) {
                        return strnatcasecmp(a->name().toStdString(),
                                b->name().toStdString()) < 0; });
 
-       assert(decoder_stack_);
        const auto channel_iter = dec->channels().find(pdch);
 
        QComboBox *selector = new QComboBox(parent);
@@ -859,14 +895,14 @@ QComboBox* DecodeTrace::create_channel_selector(
        if (channel_iter == dec->channels().end())
                selector->setCurrentIndex(0);
 
-       for (const shared_ptr<view::Signal> &s : sig_list) {
-               assert(s);
-               if (dynamic_pointer_cast<LogicSignal>(s) && s->enabled()) {
-                       selector->addItem(s->name(),
-                               qVariantFromValue((void*)s.get()));
+       for (const shared_ptr<data::SignalBase> &b : sig_list) {
+               assert(b);
+               if (b->logic_data() && b->enabled()) {
+                       selector->addItem(b->name(),
+                               qVariantFromValue((void*)b.get()));
 
                        if (channel_iter != dec->channels().end() &&
-                               (*channel_iter).second == s)
+                               (*channel_iter).second == b)
                                selector->setCurrentIndex(
                                        selector->count() - 1);
                }
@@ -875,40 +911,70 @@ QComboBox* DecodeTrace::create_channel_selector(
        return selector;
 }
 
+QComboBox* DecodeTrace::create_channel_selector_initial_pin(QWidget *parent,
+       const shared_ptr<data::decode::Decoder> &dec, const srd_channel *const pdch)
+{
+       QComboBox *selector = new QComboBox(parent);
+
+       selector->addItem("0", qVariantFromValue((int)SRD_INITIAL_PIN_LOW));
+       selector->addItem("1", qVariantFromValue((int)SRD_INITIAL_PIN_HIGH));
+       selector->addItem("?", qVariantFromValue((int)SRD_INITIAL_PIN_SAME_AS_SAMPLE0));
+
+       // Default to index 2 (SRD_INITIAL_PIN_SAME_AS_SAMPLE0).
+       const int idx = (!dec->initial_pins()) ? 2 : dec->initial_pins()->data[pdch->order];
+       selector->setCurrentIndex(idx);
+
+       selector->setToolTip("Initial (assumed) pin value before the first sample");
+
+       return selector;
+}
+
 void DecodeTrace::commit_decoder_channels(shared_ptr<data::decode::Decoder> &dec)
 {
        assert(dec);
 
-       map<const srd_channel*, shared_ptr<LogicSignal> > channel_map;
+       map<const srd_channel*, shared_ptr<data::SignalBase> > channel_map;
 
-       const unordered_set< shared_ptr<Signal> > sigs(session_.signals());
+       const unordered_set< shared_ptr<data::SignalBase> >
+               sigs(session_.signalbases());
+
+       GArray *const initial_pins = g_array_sized_new(FALSE, TRUE,
+               sizeof(uint8_t), channel_selectors_.size());
+       g_array_set_size(initial_pins, channel_selectors_.size());
 
        for (const ChannelSelector &s : channel_selectors_) {
                if (s.decoder_ != dec)
                        break;
 
-               const LogicSignal *const selection =
-                       (LogicSignal*)s.combo_->itemData(
+               const data::SignalBase *const selection =
+                       (data::SignalBase*)s.combo_->itemData(
                                s.combo_->currentIndex()).value<void*>();
 
-               for (shared_ptr<Signal> sig : sigs)
+               for (shared_ptr<data::SignalBase> sig : sigs)
                        if (sig.get() == selection) {
-                               channel_map[s.pdch_] =
-                                       dynamic_pointer_cast<LogicSignal>(sig);
+                               channel_map[s.pdch_] = sig;
                                break;
                        }
+
+               int selection_initial_pin = s.combo_initial_pin_->itemData(
+                       s.combo_initial_pin_->currentIndex()).value<int>();
+
+               initial_pins->data[s.pdch_->order] = selection_initial_pin;
        }
 
        dec->set_channels(channel_map);
+       dec->set_initial_pins(initial_pins);
 }
 
 void DecodeTrace::commit_channels()
 {
-       assert(decoder_stack_);
-       for (shared_ptr<data::decode::Decoder> dec : decoder_stack_->stack())
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
+       assert(decoder_stack);
+       for (shared_ptr<data::decode::Decoder> dec : decoder_stack->stack())
                commit_decoder_channels(dec);
 
-       decoder_stack_->begin_decode();
+       decoder_stack->begin_decode();
 }
 
 void DecodeTrace::on_new_decode_data()
@@ -924,7 +990,7 @@ void DecodeTrace::delete_pressed()
 
 void DecodeTrace::on_delete()
 {
-       session_.remove_decode_signal(this);
+       session_.remove_decode_signal(base_);
 }
 
 void DecodeTrace::on_channel_selected(int)
@@ -932,32 +998,42 @@ void DecodeTrace::on_channel_selected(int)
        commit_channels();
 }
 
+void DecodeTrace::on_initial_pin_selected(int)
+{
+       commit_channels();
+}
+
 void DecodeTrace::on_stack_decoder(srd_decoder *decoder)
 {
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
        assert(decoder);
-       assert(decoder_stack_);
-       decoder_stack_->push(shared_ptr<data::decode::Decoder>(
-               new data::decode::Decoder(decoder)));
-       decoder_stack_->begin_decode();
+       assert(decoder_stack);
+       decoder_stack->push(make_shared<data::decode::Decoder>(decoder));
+       decoder_stack->begin_decode();
 
        create_popup_form();
 }
 
 void DecodeTrace::on_delete_decoder(int index)
 {
-       decoder_stack_->remove(index);
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
+       decoder_stack->remove(index);
 
        // Update the popup
-       create_popup_form();    
+       create_popup_form();
 
-       decoder_stack_->begin_decode();
+       decoder_stack->begin_decode();
 }
 
 void DecodeTrace::on_show_hide_decoder(int index)
 {
        using pv::data::decode::Decoder;
 
-       const list< shared_ptr<Decoder> > stack(decoder_stack_->stack());
+       shared_ptr<pv::data::DecoderStack> decoder_stack = base_->decoder_stack();
+
+       const list< shared_ptr<Decoder> > stack(decoder_stack->stack());
 
        // Find the decoder in the stack
        auto iter = stack.cbegin();
@@ -977,5 +1053,6 @@ void DecodeTrace::on_show_hide_decoder(int index)
                owner_->row_item_appearance_changed(false, true);
 }
 
-} // namespace view
+} // namespace TraceView
+} // namespace views
 } // namespace pv