]> sigrok.org Git - pulseview.git/blobdiff - pv/data/decodesignal.cpp
Fix #1596 by fixing some race conditions
[pulseview.git] / pv / data / decodesignal.cpp
index a488817525ec9f64a6e08400e3812a7e07ef28e5..b9a1fabc74917fc2cc8791ed9ae7abe8ff04b38b 100644 (file)
@@ -86,6 +86,9 @@ void DecodeSignal::stack_decoder(const srd_decoder *decoder, bool restart_decode
        const shared_ptr<Decoder> dec = make_shared<Decoder>(decoder, stack_.size());
        stack_.push_back(dec);
 
+       connect(dec.get(), SIGNAL(annotation_visibility_changed()),
+               this, SLOT(on_annotation_visibility_changed()));
+
        // Include the newly created decode channels in the channel lists
        update_channel_list();
 
@@ -105,11 +108,12 @@ void DecodeSignal::remove_decoder(int index)
        assert(index < (int)stack_.size());
 
        // Find the decoder in the stack
-       auto iter = stack_.begin();
-       for (int i = 0; i < index; i++, iter++)
-               assert(iter != stack_.end());
+       auto iter = stack_.begin() + index;
+       assert(iter != stack_.end());
+
+       shared_ptr<Decoder> dec = *iter;
 
-       decoder_removed(iter->get());
+       decoder_removed(dec.get());
 
        // Delete the element
        stack_.erase(iter);
@@ -166,7 +170,7 @@ void DecodeSignal::reset_decode(bool shutting_down)
        logic_mux_data_invalid_ = true;
 
        if (!error_message_.isEmpty()) {
-               error_message_ = QString();
+               error_message_.clear();
                // TODO Emulate noquote()
                qDebug().nospace() << name() << ": Error cleared";
        }
@@ -230,10 +234,8 @@ void DecodeSignal::begin_decode()
        // Receive notifications when new sample data is available
        connect_input_notifiers();
 
-       if (get_input_segment_count() == 0) {
+       if (get_input_segment_count() == 0)
                set_error_message(tr("No input data"));
-               return;
-       }
 
        // Make sure the logic output data is complete and up-to-date
        logic_mux_interrupt_ = false;
@@ -263,12 +265,6 @@ bool DecodeSignal::is_paused() const
        return decode_paused_;
 }
 
-QString DecodeSignal::error_message() const
-{
-       lock_guard<mutex> lock(output_mutex_);
-       return error_message_;
-}
-
 const vector<decode::DecodeChannel> DecodeSignal::get_channels() const
 {
        return channels_;
@@ -313,7 +309,7 @@ void DecodeSignal::auto_assign_signals(const shared_ptr<Decoder> dec)
                }
 
                if (match) {
-                       ch.assigned_signal = match.get();
+                       ch.assigned_signal = match;
                        new_assignment = true;
                }
        }
@@ -326,7 +322,7 @@ void DecodeSignal::auto_assign_signals(const shared_ptr<Decoder> dec)
        }
 }
 
-void DecodeSignal::assign_signal(const uint16_t channel_id, const SignalBase *signal)
+void DecodeSignal::assign_signal(const uint16_t channel_id, shared_ptr<const SignalBase> signal)
 {
        for (decode::DecodeChannel& ch : channels_)
                if (ch.id == channel_id) {
@@ -344,7 +340,7 @@ int DecodeSignal::get_assigned_signal_count() const
 {
        // Count all channels that have a signal assigned to them
        return count_if(channels_.begin(), channels_.end(),
-               [](decode::DecodeChannel ch) { return ch.assigned_signal; });
+               [](decode::DecodeChannel ch) { return ch.assigned_signal.get(); });
 }
 
 void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state)
@@ -358,7 +354,7 @@ void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int in
        begin_decode();
 }
 
-double DecodeSignal::samplerate() const
+double DecodeSignal::get_samplerate() const
 {
        double result = 0;
 
@@ -391,18 +387,21 @@ int64_t DecodeSignal::get_working_sample_count(uint32_t segment_id) const
 
        for (const decode::DecodeChannel& ch : channels_)
                if (ch.assigned_signal) {
+                       if (!ch.assigned_signal->logic_data())
+                               return 0;
+
                        no_signals_assigned = false;
 
                        const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
-                       if (!logic_data || logic_data->logic_segments().empty())
+                       if (logic_data->logic_segments().empty())
                                return 0;
 
-                       try {
-                               const shared_ptr<LogicSegment> segment = logic_data->logic_segments().at(segment_id);
-                               count = min(count, (int64_t)segment->get_sample_count());
-                       } catch (out_of_range&) {
+                       if (segment_id >= logic_data->logic_segments().size())
                                return 0;
-                       }
+
+                       const shared_ptr<const LogicSegment> segment = logic_data->logic_segments()[segment_id]->get_shared_ptr();
+                       if (segment)
+                               count = min(count, (int64_t)segment->get_sample_count());
                }
 
        return (no_signals_assigned ? 0 : count);
@@ -509,18 +508,14 @@ void DecodeSignal::get_annotation_subset(deque<const Annotation*> &dest,
 uint32_t DecodeSignal::get_binary_data_chunk_count(uint32_t segment_id,
        const Decoder* dec, uint32_t bin_class_id) const
 {
-       if (segments_.size() == 0)
+       if ((segments_.size() == 0) || (segment_id >= segments_.size()))
                return 0;
 
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
+       const DecodeSegment *segment = &(segments_[segment_id]);
 
-               for (const DecodeBinaryClass& bc : segment->binary_classes)
-                       if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
-                               return bc.chunks.size();
-       } catch (out_of_range&) {
-               // Do nothing
-       }
+       for (const DecodeBinaryClass& bc : segment->binary_classes)
+               if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
+                       return bc.chunks.size();
 
        return 0;
 }
@@ -529,18 +524,17 @@ void DecodeSignal::get_binary_data_chunk(uint32_t segment_id,
        const  Decoder* dec, uint32_t bin_class_id, uint32_t chunk_id,
        const vector<uint8_t> **dest, uint64_t *size)
 {
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
+       if (segment_id >= segments_.size())
+               return;
 
-               for (const DecodeBinaryClass& bc : segment->binary_classes)
-                       if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id)) {
-                               if (dest) *dest = &(bc.chunks.at(chunk_id).data);
-                               if (size) *size = bc.chunks.at(chunk_id).data.size();
-                               return;
-                       }
-       } catch (out_of_range&) {
-               // Do nothing
-       }
+       const DecodeSegment *segment = &(segments_[segment_id]);
+
+       for (const DecodeBinaryClass& bc : segment->binary_classes)
+               if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id)) {
+                       if (dest) *dest = &(bc.chunks.at(chunk_id).data);
+                       if (size) *size = bc.chunks.at(chunk_id).data.size();
+                       return;
+               }
 }
 
 void DecodeSignal::get_merged_binary_data_chunks_by_sample(uint32_t segment_id,
@@ -549,39 +543,38 @@ void DecodeSignal::get_merged_binary_data_chunks_by_sample(uint32_t segment_id,
 {
        assert(dest != nullptr);
 
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
-
-               const DecodeBinaryClass* bin_class = nullptr;
-               for (const DecodeBinaryClass& bc : segment->binary_classes)
-                       if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
-                               bin_class = &bc;
-
-               // Determine overall size before copying to resize dest vector only once
-               uint64_t size = 0;
-               uint64_t matches = 0;
-               for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
-                       if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
-                               size += chunk.data.size();
-                               matches++;
-                       }
-               dest->resize(size);
-
-               uint64_t offset = 0;
-               uint64_t matches2 = 0;
-               for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
-                       if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
-                               memcpy(dest->data() + offset, chunk.data.data(), chunk.data.size());
-                               offset += chunk.data.size();
-                               matches2++;
-
-                               // Make sure we don't overwrite memory if the array grew in the meanwhile
-                               if (matches2 == matches)
-                                       break;
-                       }
-       } catch (out_of_range&) {
-               // Do nothing
-       }
+       if (segment_id >= segments_.size())
+               return;
+
+       const DecodeSegment *segment = &(segments_[segment_id]);
+
+       const DecodeBinaryClass* bin_class = nullptr;
+       for (const DecodeBinaryClass& bc : segment->binary_classes)
+               if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
+                       bin_class = &bc;
+
+       // Determine overall size before copying to resize dest vector only once
+       uint64_t size = 0;
+       uint64_t matches = 0;
+       for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
+               if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
+                       size += chunk.data.size();
+                       matches++;
+               }
+       dest->resize(size);
+
+       uint64_t offset = 0;
+       uint64_t matches2 = 0;
+       for (const DecodeBinaryDataChunk& chunk : bin_class->chunks)
+               if ((chunk.sample >= start_sample) && (chunk.sample < end_sample)) {
+                       memcpy(dest->data() + offset, chunk.data.data(), chunk.data.size());
+                       offset += chunk.data.size();
+                       matches2++;
+
+                       // Make sure we don't overwrite memory if the array grew in the meanwhile
+                       if (matches2 == matches)
+                               break;
+               }
 }
 
 void DecodeSignal::get_merged_binary_data_chunks_by_offset(uint32_t segment_id,
@@ -590,54 +583,52 @@ void DecodeSignal::get_merged_binary_data_chunks_by_offset(uint32_t segment_id,
 {
        assert(dest != nullptr);
 
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
-
-               const DecodeBinaryClass* bin_class = nullptr;
-               for (const DecodeBinaryClass& bc : segment->binary_classes)
-                       if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
-                               bin_class = &bc;
-
-               // Determine overall size before copying to resize dest vector only once
-               uint64_t size = 0;
-               uint64_t offset = 0;
-               for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
-                       if (offset >= start)
-                               size += chunk.data.size();
-                       offset += chunk.data.size();
-                       if (offset >= end)
-                               break;
-               }
-               dest->resize(size);
-
-               offset = 0;
-               uint64_t dest_offset = 0;
-               for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
-                       if (offset >= start) {
-                               memcpy(dest->data() + dest_offset, chunk.data.data(), chunk.data.size());
-                               dest_offset += chunk.data.size();
-                       }
-                       offset += chunk.data.size();
-                       if (offset >= end)
-                               break;
+       if (segment_id >= segments_.size())
+               return;
+
+       const DecodeSegment *segment = &(segments_[segment_id]);
+
+       const DecodeBinaryClass* bin_class = nullptr;
+       for (const DecodeBinaryClass& bc : segment->binary_classes)
+               if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
+                       bin_class = &bc;
+
+       // Determine overall size before copying to resize dest vector only once
+       uint64_t size = 0;
+       uint64_t offset = 0;
+       for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
+               if (offset >= start)
+                       size += chunk.data.size();
+               offset += chunk.data.size();
+               if (offset >= end)
+                       break;
+       }
+       dest->resize(size);
+
+       offset = 0;
+       uint64_t dest_offset = 0;
+       for (const DecodeBinaryDataChunk& chunk : bin_class->chunks) {
+               if (offset >= start) {
+                       memcpy(dest->data() + dest_offset, chunk.data.data(), chunk.data.size());
+                       dest_offset += chunk.data.size();
                }
-       } catch (out_of_range&) {
-               // Do nothing
+               offset += chunk.data.size();
+               if (offset >= end)
+                       break;
        }
 }
 
 const DecodeBinaryClass* DecodeSignal::get_binary_data_class(uint32_t segment_id,
        const Decoder* dec, uint32_t bin_class_id) const
 {
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
+       if (segment_id >= segments_.size())
+               return nullptr;
 
-               for (const DecodeBinaryClass& bc : segment->binary_classes)
-                       if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
-                               return &bc;
-       } catch (out_of_range&) {
-               // Do nothing
-       }
+       const DecodeSegment *segment = &(segments_[segment_id]);
+
+       for (const DecodeBinaryClass& bc : segment->binary_classes)
+               if ((bc.decoder == dec) && (bc.info->bin_class_id == bin_class_id))
+                       return &bc;
 
        return nullptr;
 }
@@ -645,14 +636,12 @@ const DecodeBinaryClass* DecodeSignal::get_binary_data_class(uint32_t segment_id
 const deque<const Annotation*>* DecodeSignal::get_all_annotations_by_segment(
        uint32_t segment_id) const
 {
-       try {
-               const DecodeSegment *segment = &(segments_.at(segment_id));
-               return &(segment->all_annotations);
-       } catch (out_of_range&) {
-               // Do nothing
-       }
+       if (segment_id >= segments_.size())
+               return nullptr;
 
-       return nullptr;
+       const DecodeSegment *segment = &(segments_[segment_id]);
+
+       return &(segment->all_annotations);
 }
 
 void DecodeSignal::save_settings(QSettings &settings) const
@@ -698,7 +687,7 @@ void DecodeSignal::save_settings(QSettings &settings) const
                i = 0;
                for (const AnnotationClass* ann_class : decoder->ann_classes()) {
                        settings.beginGroup("ann_class" + QString::number(i));
-                       settings.setValue("visible", ann_class->visible);
+                       settings.setValue("visible", ann_class->visible());
                        settings.endGroup();
                        i++;
                }
@@ -752,6 +741,9 @@ void DecodeSignal::restore_settings(QSettings &settings)
                        if (QString::fromUtf8(dec->id) == id) {
                                shared_ptr<Decoder> decoder = make_shared<Decoder>(dec, stack_.size());
 
+                               connect(decoder.get(), SIGNAL(annotation_visibility_changed()),
+                                       this, SLOT(on_annotation_visibility_changed()));
+
                                stack_.push_back(decoder);
                                decoder->set_visible(settings.value("visible", true).toBool());
 
@@ -782,7 +774,7 @@ void DecodeSignal::restore_settings(QSettings &settings)
                                i = 0;
                                for (AnnotationClass* ann_class : decoder->ann_classes()) {
                                        settings.beginGroup("ann_class" + QString::number(i));
-                                       ann_class->visible = settings.value("visible", true).toBool();
+                                       ann_class->set_visible(settings.value("visible", true).toBool());
                                        settings.endGroup();
                                        i++;
                                }
@@ -815,8 +807,8 @@ void DecodeSignal::restore_settings(QSettings &settings)
                QString assigned_signal_name = settings.value("assigned_signal_name").toString();
 
                for (const shared_ptr<data::SignalBase>& signal : signalbases)
-                       if (signal->name() == assigned_signal_name)
-                               channel->assigned_signal = signal.get();
+                       if ((signal->name() == assigned_signal_name) && (signal->type() != SignalBase::DecodeChannel))
+                               channel->assigned_signal = signal;
 
                channel->initial_pin_state = settings.value("initial_pin_state").toInt();
 
@@ -831,11 +823,28 @@ void DecodeSignal::restore_settings(QSettings &settings)
        begin_decode();
 }
 
-void DecodeSignal::set_error_message(QString msg)
+bool DecodeSignal::all_input_segments_complete(uint32_t segment_id) const
 {
-       error_message_ = msg;
-       // TODO Emulate noquote()
-       qDebug().nospace() << name() << ": " << msg;
+       bool all_complete = true;
+
+       for (const decode::DecodeChannel& ch : channels_)
+               if (ch.assigned_signal) {
+                       if (!ch.assigned_signal->logic_data())
+                               continue;
+
+                       const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
+                       if (logic_data->logic_segments().empty())
+                               return false;
+
+                       if (segment_id >= logic_data->logic_segments().size())
+                               return false;
+
+                       const shared_ptr<const LogicSegment> segment = logic_data->logic_segments()[segment_id]->get_shared_ptr();
+                       if (segment && !segment->is_complete())
+                               all_complete = false;
+               }
+
+       return all_complete;
 }
 
 uint32_t DecodeSignal::get_input_segment_count() const
@@ -859,7 +868,7 @@ uint32_t DecodeSignal::get_input_segment_count() const
        return (no_signals_assigned ? 0 : count);
 }
 
-uint32_t DecodeSignal::get_input_samplerate(uint32_t segment_id) const
+double DecodeSignal::get_input_samplerate(uint32_t segment_id) const
 {
        double samplerate = 0;
 
@@ -870,8 +879,10 @@ uint32_t DecodeSignal::get_input_samplerate(uint32_t segment_id) const
                                continue;
 
                        try {
-                               const shared_ptr<LogicSegment> segment = logic_data->logic_segments().at(segment_id);
-                               samplerate = segment->samplerate();
+                               const shared_ptr<const LogicSegment> segment =
+                                       logic_data->logic_segments().at(segment_id)->get_shared_ptr();
+                               if (segment)
+                                       samplerate = segment->samplerate();
                        } catch (out_of_range&) {
                                // Do nothing
                        }
@@ -998,7 +1009,7 @@ void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, c
                return;
 
        // Fetch the channel segments and their data
-       vector<shared_ptr<LogicSegment> > segments;
+       vector<shared_ptr<const LogicSegment> > segments;
        vector<const uint8_t*> signal_data;
        vector<uint8_t> signal_in_bytepos;
        vector<uint8_t> signal_in_bitpos;
@@ -1007,14 +1018,19 @@ void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, c
                if (ch.assigned_signal) {
                        const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data();
 
-                       shared_ptr<LogicSegment> segment;
-                       try {
-                               segment = logic_data->logic_segments().at(segment_id);
-                       } catch (out_of_range&) {
+                       shared_ptr<const LogicSegment> segment;
+                       if (segment_id < logic_data->logic_segments().size()) {
+                               segment = logic_data->logic_segments().at(segment_id)->get_shared_ptr();
+                       } else {
                                qDebug() << "Muxer error for" << name() << ":" << ch.assigned_signal->name() \
                                        << "has no logic segment" << segment_id;
+                               logic_mux_interrupt_ = true;
                                return;
                        }
+
+                       if (!segment)
+                               return;
+
                        segments.push_back(segment);
 
                        uint8_t* data = new uint8_t[(end - start) * segment->unit_size()];
@@ -1026,7 +1042,6 @@ void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, c
                        signal_in_bitpos.push_back(bitpos % 8);
                }
 
-
        shared_ptr<LogicSegment> output_segment;
        try {
                output_segment = logic_mux_data_->logic_segments().at(segment_id);
@@ -1034,6 +1049,7 @@ void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, c
                qDebug() << "Muxer error for" << name() << ": no logic mux segment" \
                        << segment_id << "in mux_logic_samples(), mux segments size is" \
                        << logic_mux_data_->logic_segments().size();
+               logic_mux_interrupt_ = true;
                return;
        }
 
@@ -1077,75 +1093,93 @@ void DecodeSignal::mux_logic_samples(uint32_t segment_id, const int64_t start, c
 
 void DecodeSignal::logic_mux_proc()
 {
-       uint32_t segment_id = 0;
+       uint32_t input_segment_count;
+       do {
+               input_segment_count = get_input_segment_count();
+               if (input_segment_count == 0) {
+                       // Wait for input data
+                       unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
+                       logic_mux_cond_.wait(logic_mux_lock);
+               }
+       } while ((!logic_mux_interrupt_) && (input_segment_count == 0));
+
+       if (logic_mux_interrupt_)
+               return;
 
        assert(logic_mux_data_);
 
+       uint32_t segment_id = 0;
+
        // Create initial logic mux segment
        shared_ptr<LogicSegment> output_segment =
-               make_shared<LogicSegment>(*logic_mux_data_, segment_id,
-                       logic_mux_unit_size_, 0);
+               make_shared<LogicSegment>(*logic_mux_data_, segment_id, logic_mux_unit_size_, 0);
        logic_mux_data_->push_segment(output_segment);
 
        output_segment->set_samplerate(get_input_samplerate(0));
 
+       // Logic mux data is being updated
+       logic_mux_data_invalid_ = false;
+
+       uint64_t samples_to_process;
        do {
-               const uint64_t input_sample_count = get_working_sample_count(segment_id);
-               const uint64_t output_sample_count = output_segment->get_sample_count();
+               do {
+                       const uint64_t input_sample_count = get_working_sample_count(segment_id);
+                       const uint64_t output_sample_count = output_segment->get_sample_count();
 
-               const uint64_t samples_to_process =
-                       (input_sample_count > output_sample_count) ?
-                       (input_sample_count - output_sample_count) : 0;
+                       samples_to_process =
+                               (input_sample_count > output_sample_count) ?
+                               (input_sample_count - output_sample_count) : 0;
 
-               // Process the samples if necessary...
-               if (samples_to_process > 0) {
-                       const uint64_t unit_size = output_segment->unit_size();
-                       const uint64_t chunk_sample_count = DecodeChunkLength / unit_size;
+                       if (samples_to_process > 0) {
+                               const uint64_t unit_size = output_segment->unit_size();
+                               const uint64_t chunk_sample_count = DecodeChunkLength / unit_size;
 
-                       uint64_t processed_samples = 0;
-                       do {
-                               const uint64_t start_sample = output_sample_count + processed_samples;
-                               const uint64_t sample_count =
-                                       min(samples_to_process - processed_samples,     chunk_sample_count);
+                               uint64_t processed_samples = 0;
+                               do {
+                                       const uint64_t start_sample = output_sample_count + processed_samples;
+                                       const uint64_t sample_count =
+                                               min(samples_to_process - processed_samples,     chunk_sample_count);
 
-                               mux_logic_samples(segment_id, start_sample, start_sample + sample_count);
-                               processed_samples += sample_count;
+                                       mux_logic_samples(segment_id, start_sample, start_sample + sample_count);
+                                       processed_samples += sample_count;
 
-                               // ...and process the newly muxed logic data
-                               decode_input_cond_.notify_one();
-                       } while (!logic_mux_interrupt_ && (processed_samples < samples_to_process));
-               }
+                                       // ...and process the newly muxed logic data
+                                       decode_input_cond_.notify_one();
+                               } while (!logic_mux_interrupt_ && (processed_samples < samples_to_process));
+                       }
+               } while (!logic_mux_interrupt_ && (samples_to_process > 0));
 
-               if (samples_to_process == 0) {
-                       // TODO Optimize this by caching the input segment count and only
-                       // querying it when the cached value was reached
-                       if (segment_id < get_input_segment_count() - 1) {
-                               // Process next segment
-                               segment_id++;
+               if (!logic_mux_interrupt_) {
+                       // samples_to_process is now 0, we've exhausted the currently available input data
 
-                               output_segment =
-                                       make_shared<LogicSegment>(*logic_mux_data_, segment_id,
-                                               logic_mux_unit_size_, 0);
-                               logic_mux_data_->push_segment(output_segment);
+                       // If the input segments are complete, we've completed this segment
+                       if (all_input_segments_complete(segment_id)) {
+                               if (!output_segment->is_complete())
+                                       output_segment->set_complete();
 
-                               output_segment->set_samplerate(get_input_samplerate(segment_id));
+                               if (segment_id < get_input_segment_count() - 1) {
+                                       // Process next segment
+                                       segment_id++;
 
-                       } else {
-                               // All segments have been processed
-                               logic_mux_data_invalid_ = false;
+                                       output_segment =
+                                               make_shared<LogicSegment>(*logic_mux_data_, segment_id,
+                                                       logic_mux_unit_size_, 0);
+                                       logic_mux_data_->push_segment(output_segment);
 
+                                       output_segment->set_samplerate(get_input_samplerate(segment_id));
+                               }
+                       } else {
                                // Wait for more input
                                unique_lock<mutex> logic_mux_lock(logic_mux_mutex_);
                                logic_mux_cond_.wait(logic_mux_lock);
                        }
                }
-
        } while (!logic_mux_interrupt_);
 }
 
 void DecodeSignal::decode_data(
        const int64_t abs_start_samplenum, const int64_t sample_count,
-       const shared_ptr<LogicSegment> input_segment)
+       const shared_ptr<const LogicSegment> input_segment)
 {
        const int64_t unit_size = input_segment->unit_size();
        const int64_t chunk_sample_count = DecodeChunkLength / unit_size;
@@ -1169,8 +1203,10 @@ void DecodeSignal::decode_data(
                input_segment->get_samples(i, chunk_end, chunk);
 
                if (srd_session_send(srd_session_, i, chunk_end, chunk,
-                               data_size, unit_size) != SRD_OK)
+                               data_size, unit_size) != SRD_OK) {
                        set_error_message(tr("Decoder reported an error"));
+                       decode_interrupt_ = true;
+               }
 
                delete[] chunk;
 
@@ -1196,16 +1232,20 @@ void DecodeSignal::decode_proc()
        current_segment_id_ = 0;
 
        // If there is no input data available yet, wait until it is or we're interrupted
-       if (logic_mux_data_->logic_segments().size() == 0) {
-               unique_lock<mutex> input_wait_lock(input_mutex_);
-               decode_input_cond_.wait(input_wait_lock);
-       }
+       do {
+               if (logic_mux_data_->logic_segments().size() == 0) {
+                       // Wait for input data
+                       unique_lock<mutex> input_wait_lock(input_mutex_);
+                       decode_input_cond_.wait(input_wait_lock);
+               }
+       } while ((!decode_interrupt_) && (logic_mux_data_->logic_segments().size() == 0));
 
        if (decode_interrupt_)
                return;
 
-       shared_ptr<LogicSegment> input_segment = logic_mux_data_->logic_segments().front();
-       assert(input_segment);
+       shared_ptr<const LogicSegment> input_segment = logic_mux_data_->logic_segments().front()->get_shared_ptr();
+       if (!input_segment)
+               return;
 
        // Create the initial segment and set its sample rate so that we can pass it to SRD
        create_decode_segment();
@@ -1214,57 +1254,58 @@ void DecodeSignal::decode_proc()
 
        start_srd_session();
 
-       uint64_t sample_count = 0;
+       uint64_t samples_to_process = 0;
        uint64_t abs_start_samplenum = 0;
        do {
                // Keep processing new samples until we exhaust the input data
                do {
-                       lock_guard<mutex> input_lock(input_mutex_);
-                       sample_count = input_segment->get_sample_count() - abs_start_samplenum;
+                       samples_to_process = input_segment->get_sample_count() - abs_start_samplenum;
 
-                       if (sample_count > 0) {
-                               decode_data(abs_start_samplenum, sample_count, input_segment);
-                               abs_start_samplenum += sample_count;
+                       if (samples_to_process > 0) {
+                               decode_data(abs_start_samplenum, samples_to_process, input_segment);
+                               abs_start_samplenum += samples_to_process;
                        }
-               } while (error_message_.isEmpty() && (sample_count > 0) && !decode_interrupt_);
-
-               if (error_message_.isEmpty() && !decode_interrupt_ && sample_count == 0) {
-                       if (current_segment_id_ < logic_mux_data_->logic_segments().size() - 1) {
-                               // Process next segment
-                               current_segment_id_++;
-
-                               try {
-                                       input_segment = logic_mux_data_->logic_segments().at(current_segment_id_);
-                               } catch (out_of_range&) {
-                                       qDebug() << "Decode error for" << name() << ": no logic mux segment" \
-                                               << current_segment_id_ << "in decode_proc(), mux segments size is" \
-                                               << logic_mux_data_->logic_segments().size();
-                                       return;
+               } while (!decode_interrupt_ && (samples_to_process > 0));
+
+               if (!decode_interrupt_) {
+                       // samples_to_process is now 0, we've exhausted the currently available input data
+
+                       // If the input segment is complete, we've exhausted this segment
+                       if (input_segment->is_complete()) {
+                               if (current_segment_id_ < logic_mux_data_->logic_segments().size() - 1) {
+                                       // Process next segment
+                                       current_segment_id_++;
+
+                                       try {
+                                               input_segment = logic_mux_data_->logic_segments().at(current_segment_id_);
+                                       } catch (out_of_range&) {
+                                               qDebug() << "Decode error for" << name() << ": no logic mux segment" \
+                                                       << current_segment_id_ << "in decode_proc(), mux segments size is" \
+                                                       << logic_mux_data_->logic_segments().size();
+                                               decode_interrupt_ = true;
+                                               return;
+                                       }
+                                       abs_start_samplenum = 0;
+
+                                       // Create the next segment and set its metadata
+                                       create_decode_segment();
+                                       segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
+                                       segments_.at(current_segment_id_).start_time = input_segment->start_time();
+
+                                       // Reset decoder state but keep the decoder stack intact
+                                       terminate_srd_session();
+                               } else {
+                                       // All segments have been processed
+                                       if (!decode_interrupt_)
+                                               decode_finished();
                                }
-                               abs_start_samplenum = 0;
-
-                               // Create the next segment and set its metadata
-                               create_decode_segment();
-                               segments_.at(current_segment_id_).samplerate = input_segment->samplerate();
-                               segments_.at(current_segment_id_).start_time = input_segment->start_time();
-
-                               // Reset decoder state but keep the decoder stack intact
-                               terminate_srd_session();
                        } else {
-                               // All segments have been processed
-                               decode_finished();
-
-                               // Wait for new input data or an interrupt was requested
+                               // Wait for more input data
                                unique_lock<mutex> input_wait_lock(input_mutex_);
                                decode_input_cond_.wait(input_wait_lock);
                        }
                }
-       } while (error_message_.isEmpty() && !decode_interrupt_);
-
-       // Potentially reap decoders when the application no longer is
-       // interested in their (pending) results.
-       if (decode_interrupt_)
-               terminate_srd_session();
+       } while (!decode_interrupt_);
 }
 
 void DecodeSignal::start_srd_session()
@@ -1381,11 +1422,11 @@ void DecodeSignal::connect_input_notifiers()
                if (!ch.assigned_signal)
                        continue;
 
-               const data::SignalBase *signal = ch.assigned_signal;
-               connect(signal, SIGNAL(samples_cleared()),
-                       this, SLOT(on_data_cleared()));
-               connect(signal, SIGNAL(samples_added(uint64_t, uint64_t, uint64_t)),
-                       this, SLOT(on_data_received()));
+               const data::SignalBase *signal = ch.assigned_signal.get();
+               connect(signal, &data::SignalBase::samples_cleared,
+                       this, &DecodeSignal::on_data_cleared);
+               connect(signal, &data::SignalBase::samples_added,
+                       this, &DecodeSignal::on_data_received);
        }
 }
 
@@ -1420,6 +1461,9 @@ void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signa
        if (ds->decode_interrupt_)
                return;
 
+       if (ds->segments_.empty())
+               return;
+
        lock_guard<mutex> lock(ds->output_mutex_);
 
        // Get the decoder and the annotation data
@@ -1453,10 +1497,62 @@ void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signa
        // Add the annotation to the row
        const Annotation* ann = row_data.emplace_annotation(pdata);
 
-       // Add the annotation to the global annotation list
+       // We insert the annotation into the global annotation list in a way so that
+       // the annotation list is sorted by start sample and length. Otherwise, we'd
+       // have to sort the model, which is expensive
        deque<const Annotation*>& all_annotations =
                ds->segments_[ds->current_segment_id_].all_annotations;
-       all_annotations.emplace_back(ann);
+
+       if (all_annotations.empty()) {
+               all_annotations.emplace_back(ann);
+       } else {
+               const uint64_t new_ann_len = (pdata->end_sample - pdata->start_sample);
+               bool ann_has_earlier_start = (pdata->start_sample < all_annotations.back()->start_sample());
+               bool ann_is_longer = (new_ann_len >
+                       (all_annotations.back()->end_sample() - all_annotations.back()->start_sample()));
+
+               if (ann_has_earlier_start && ann_is_longer) {
+                       bool ann_has_same_start;
+                       auto it = all_annotations.end();
+
+                       do {
+                               it--;
+                               ann_has_earlier_start = (pdata->start_sample < (*it)->start_sample());
+                               ann_has_same_start = (pdata->start_sample == (*it)->start_sample());
+                               ann_is_longer = (new_ann_len > (*it)->length());
+                       } while ((ann_has_earlier_start || (ann_has_same_start && ann_is_longer)) && (it != all_annotations.begin()));
+
+                       // Allow inserting at the front
+                       if (it != all_annotations.begin())
+                               it++;
+
+                       all_annotations.emplace(it, ann);
+               } else
+                       all_annotations.emplace_back(ann);
+       }
+
+       // When emplace_annotation() inserts instead of appends an annotation,
+       // the pointers in all_annotations that follow the inserted annotation and
+       // point to annotations for this row are off by one and must be updated
+       if (&(row_data.annotations().back()) != ann) {
+               // Search backwards until we find the annotation we just added
+               auto row_it = row_data.annotations().end();
+               auto all_it = all_annotations.end();
+               do {
+                       all_it--;
+                       if ((*all_it)->row_data() == &row_data)
+                               row_it--;
+               } while (&(*row_it) != ann);
+
+               // Update the annotation addresses for this row's annotations until the end
+               do {
+                       if ((*all_it)->row_data() == &row_data) {
+                               *all_it = &(*row_it);
+                               row_it++;
+                       }
+                       all_it++;
+               } while (all_it != all_annotations.end());
+       }
 }
 
 void DecodeSignal::binary_callback(srd_proto_data *pdata, void *decode_signal)
@@ -1536,5 +1632,10 @@ void DecodeSignal::on_data_received()
                logic_mux_cond_.notify_one();
 }
 
+void DecodeSignal::on_annotation_visibility_changed()
+{
+       annotation_visibility_changed();
+}
+
 } // namespace data
 } // namespace pv