X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fsession.cpp;h=a8047f7da7f51ad9417f7861e447e465a2a77f94;hp=2e98c8f73f40c08a70f451c60716824a1b348bbb;hb=4640a84e926ac4b82e2a1b6ef9fc80ef44c2bd3c;hpb=efdec55aec1a137460fa362a381ed1904182bfed

diff --git a/pv/session.cpp b/pv/session.cpp
index 2e98c8f7..a8047f7d 100644
--- a/pv/session.cpp
+++ b/pv/session.cpp
@@ -17,32 +17,28 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifdef _WIN32
-// Windows: Avoid boost/thread namespace pollution (which includes windows.h).
-#define NOGDI
-#define NORESOURCE
-#endif
-#include <boost/thread/locks.hpp>
-#include <boost/thread/shared_mutex.hpp>
-
-#include <QFileInfo>
-
 #include <cassert>
+#include <memory>
 #include <mutex>
 #include <stdexcept>
 
 #include <sys/stat.h>
 
-#include "session.hpp"
+#include <QDebug>
+#include <QDir>
+#include <QFileInfo>
+
 #include "devicemanager.hpp"
+#include "mainwindow.hpp"
+#include "session.hpp"
+#include "util.hpp"
 
 #include "data/analog.hpp"
 #include "data/analogsegment.hpp"
-#include "data/decoderstack.hpp"
+#include "data/decode/decoder.hpp"
 #include "data/logic.hpp"
 #include "data/logicsegment.hpp"
 #include "data/signalbase.hpp"
-#include "data/decode/decoder.hpp"
 
 #include "devices/hardwaredevice.hpp"
 #include "devices/inputfile.hpp"
@@ -50,69 +46,98 @@
 
 #include "toolbars/mainbar.hpp"
 
-#include "view/analogsignal.hpp"
-#include "view/decodetrace.hpp"
-#include "view/logicsignal.hpp"
-#include "view/signal.hpp"
-#include "view/view.hpp"
+#include "views/trace/analogsignal.hpp"
+#include "views/trace/decodetrace.hpp"
+#include "views/trace/logicsignal.hpp"
+#include "views/trace/signal.hpp"
+#include "views/trace/view.hpp"
 
 #include <libsigrokcxx/libsigrokcxx.hpp>
 
+#ifdef ENABLE_FLOW
+#include <gstreamermm.h>
+#include <libsigrokflow/libsigrokflow.hpp>
+#endif
+
 #ifdef ENABLE_DECODE
 #include <libsigrokdecode/libsigrokdecode.h>
+#include "data/decodesignal.hpp"
 #endif
 
-using boost::shared_lock;
-using boost::shared_mutex;
-using boost::unique_lock;
-
+using std::bad_alloc;
 using std::dynamic_pointer_cast;
+using std::find_if;
 using std::function;
-using std::lock_guard;
 using std::list;
+using std::lock_guard;
+using std::make_pair;
+using std::make_shared;
 using std::map;
+using std::max;
+using std::move;
 using std::mutex;
 using std::pair;
 using std::recursive_mutex;
-using std::set;
+using std::runtime_error;
 using std::shared_ptr;
 using std::string;
-using std::unordered_set;
+#ifdef ENABLE_FLOW
+using std::unique_lock;
+#endif
+using std::unique_ptr;
 using std::vector;
 
 using sigrok::Analog;
 using sigrok::Channel;
-using sigrok::ChannelType;
 using sigrok::ConfigKey;
 using sigrok::DatafeedCallbackFunction;
 using sigrok::Error;
-using sigrok::Header;
 using sigrok::InputFormat;
 using sigrok::Logic;
 using sigrok::Meta;
-using sigrok::OutputFormat;
 using sigrok::Packet;
-using sigrok::PacketPayload;
 using sigrok::Session;
-using sigrok::SessionDevice;
 
 using Glib::VariantBase;
-using Glib::Variant;
+
+#ifdef ENABLE_FLOW
+using Gst::Bus;
+using Gst::ElementFactory;
+using Gst::Pipeline;
+#endif
+
+using pv::data::SignalGroup;
+using pv::util::Timestamp;
+using pv::views::trace::Signal;
+using pv::views::trace::AnalogSignal;
+using pv::views::trace::LogicSignal;
 
 namespace pv {
+
+shared_ptr<sigrok::Context> Session::sr_context;
+
 Session::Session(DeviceManager &device_manager, QString name) :
+	shutting_down_(false),
 	device_manager_(device_manager),
 	default_name_(name),
 	name_(name),
 	capture_state_(Stopped),
-	cur_samplerate_(0)
+	cur_samplerate_(0),
+	data_saved_(true)
 {
 }
 
 Session::~Session()
 {
+	shutting_down_ = true;
+
 	// Stop and join to the thread
 	stop_capture();
+
+	for (SignalGroup* group : signal_groups_) {
+		group->clear();
+		delete group;
+	}
 }
 
 DeviceManager& Session::device_manager()
@@ -152,17 +177,27 @@ void Session::set_name(QString name)
 	name_changed();
 }
 
-const std::list< std::shared_ptr<views::ViewBase> > Session::views() const
+QString Session::save_path() const
+{
+	return save_path_;
+}
+
+void Session::set_save_path(QString path)
+{
+	save_path_ = path;
+}
+
+const vector< shared_ptr<views::ViewBase> > Session::views() const
 {
 	return views_;
 }
 
-std::shared_ptr<views::ViewBase> Session::main_view() const
+shared_ptr<views::ViewBase> Session::main_view() const
 {
 	return main_view_;
 }
 
-void Session::set_main_bar(std::shared_ptr<pv::toolbars::MainBar> main_bar)
+void Session::set_main_bar(shared_ptr<pv::toolbars::MainBar> main_bar)
 {
 	main_bar_ = main_bar;
 }
@@ -172,11 +207,94 @@ shared_ptr<pv::toolbars::MainBar> Session::main_bar() const
 	return main_bar_;
 }
 
+bool Session::data_saved() const
+{
+	return data_saved_;
+}
+
+void Session::save_setup(QSettings &settings) const
+{
+	int i = 0;
+
+	// Save channels and decoders
+	for (const shared_ptr<data::SignalBase>& base : signalbases_) {
+#ifdef ENABLE_DECODE
+		if (base->is_decode_signal()) {
+			settings.beginGroup("decode_signal" + QString::number(i++));
+			base->save_settings(settings);
+			settings.endGroup();
+		} else
+#endif
+		{
+			settings.beginGroup(base->internal_name());
+			base->save_settings(settings);
+			settings.endGroup();
+		}
+	}
+
+	settings.setValue("decode_signals", i);
+
+	// Save view states and their signal settings
+	// Note: main_view must be saved as view0
+	i = 0;
+	settings.beginGroup("view" + QString::number(i++));
+	main_view_->save_settings(settings);
+	settings.endGroup();
+
+	for (const shared_ptr<views::ViewBase>& view : views_) {
+		if (view != main_view_) {
+			settings.beginGroup("view" + QString::number(i++));
+			settings.setValue("type", view->get_type());
+			view->save_settings(settings);
+			settings.endGroup();
+		}
+	}
+
+	settings.setValue("views", i);
+
+	int view_id = 0;
+	i = 0;
+	for (const shared_ptr<views::ViewBase>& vb : views_) {
+		shared_ptr<views::trace::View> tv = dynamic_pointer_cast<views::trace::View>(vb);
+		if (tv) {
+			for (const shared_ptr<views::trace::TimeItem>& time_item : tv->time_items()) {
+
+				const shared_ptr<views::trace::Flag> flag =
+					dynamic_pointer_cast<views::trace::Flag>(time_item);
+				if (flag) {
+					if (!flag->enabled())
+						continue;
+
+					settings.beginGroup("meta_obj" + QString::number(i++));
+					settings.setValue("type", "time_marker");
+					settings.setValue("assoc_view", view_id);
+					GlobalSettings::store_timestamp(settings, "time", flag->time());
+					settings.setValue("text", flag->get_text());
+					settings.endGroup();
+				}
+			}
+
+			if (tv->cursors_shown()) {
+				settings.beginGroup("meta_obj" + QString::number(i++));
+				settings.setValue("type", "selection");
+				settings.setValue("assoc_view", view_id);
+				const shared_ptr<views::trace::CursorPair> cp = tv->cursors();
+				GlobalSettings::store_timestamp(settings, "start_time", cp->first()->time());
+				GlobalSettings::store_timestamp(settings, "end_time", cp->second()->time());
+				settings.endGroup();
+			}
+		}
+
+		view_id++;
+	}
+
+	settings.setValue("meta_objs", i);
+}
+
 void Session::save_settings(QSettings &settings) const
 {
 	map<string, string> dev_info;
 	list<string> key_list;
-	int stacks = 0, views = 0;
 
 	if (device_) {
 		shared_ptr<devices::HardwareDevice> hw_device =
@@ -186,15 +304,15 @@ void Session::save_settings(QSettings &settings) const
 			settings.setValue("device_type", "hardware");
 			settings.beginGroup("device");
 
-			key_list.push_back("vendor");
-			key_list.push_back("model");
-			key_list.push_back("version");
-			key_list.push_back("serial_num");
-			key_list.push_back("connection_id");
+			key_list.emplace_back("vendor");
+			key_list.emplace_back("model");
+			key_list.emplace_back("version");
+			key_list.emplace_back("serial_num");
+			key_list.emplace_back("connection_id");
 
 			dev_info = device_manager_.get_device_info(device_);
 
-			for (string key : key_list) {
+			for (string& key : key_list) {
 				if (dev_info.count(key))
 					settings.setValue(QString::fromUtf8(key.c_str()),
 							QString::fromUtf8(dev_info.at(key).c_str()));
@@ -205,56 +323,109 @@ void Session::save_settings(QSettings &settings) const
 			settings.endGroup();
 		}
 
-		shared_ptr<devices::SessionFile> sessionfile_device =
-			dynamic_pointer_cast< devices::SessionFile >(device_);
-
-		if (sessionfile_device) {
+		// Having saved the data to srzip overrides the current device. This is
+		// a crappy hack around the fact that saving e.g. an imported file to
+		// srzip would require changing the underlying libsigrok device
+		if (!save_path_.isEmpty()) {
+			QFileInfo fi = QFileInfo(QDir(save_path_), name_);
 			settings.setValue("device_type", "sessionfile");
 			settings.beginGroup("device");
-			settings.setValue("filename", QString::fromStdString(
-				sessionfile_device->full_name()));
+			settings.setValue("filename", fi.absoluteFilePath());
 			settings.endGroup();
-		}
-
-		// Save channels and decoders
-		for (shared_ptr<data::SignalBase> base : signalbases_) {
-#ifdef ENABLE_DECODE
-			if (base->is_decode_signal()) {
-				shared_ptr<pv::data::DecoderStack> decoder_stack =
-						base->decoder_stack();
-				std::shared_ptr<data::decode::Decoder> top_decoder =
-						decoder_stack->stack().front();
-
-				settings.beginGroup("decoder_stack" + QString::number(stacks++));
-				settings.setValue("id", top_decoder->decoder()->id);
-				settings.setValue("name", top_decoder->decoder()->name);
+		} else {
+			shared_ptr<devices::SessionFile> sessionfile_device =
+				dynamic_pointer_cast<devices::SessionFile>(device_);
+
+			if (sessionfile_device) {
+				settings.setValue("device_type", "sessionfile");
+				settings.beginGroup("device");
+				settings.setValue("filename", QString::fromStdString(
+					sessionfile_device->full_name()));
 				settings.endGroup();
-			} else
-#endif
-			{
-				settings.beginGroup(base->internal_name());
-				base->save_settings(settings);
+			}
+
+			shared_ptr<devices::InputFile> inputfile_device =
+				dynamic_pointer_cast<devices::InputFile>(device_);
+
+			if (inputfile_device) {
+				settings.setValue("device_type", "inputfile");
+				settings.beginGroup("device");
+				inputfile_device->save_meta_to_settings(settings);
 				settings.endGroup();
 			}
 		}
 
-		settings.setValue("decoder_stacks", stacks);
+		save_setup(settings);
+	}
+}
+
+void Session::restore_setup(QSettings &settings)
+{
+	// Restore channels
+	for (shared_ptr<data::SignalBase> base : signalbases_) {
+		settings.beginGroup(base->internal_name());
+		base->restore_settings(settings);
+		settings.endGroup();
+	}
 
-		// Save view states and their signal settings
-		// Note: main_view must be saved as view0
-		settings.beginGroup("view" + QString::number(views++));
-		main_view_->save_settings(settings);
+	// Restore decoders
+#ifdef ENABLE_DECODE
+	int decode_signals = settings.value("decode_signals").toInt();
+
+	for (int i = 0; i < decode_signals; i++) {
+		settings.beginGroup("decode_signal" + QString::number(i));
+		shared_ptr<data::DecodeSignal> signal = add_decode_signal();
+		signal->restore_settings(settings);
 		settings.endGroup();
+	}
+#endif
 
-		for (shared_ptr<views::ViewBase> view : views_) {
-			if (view != main_view_) {
-				settings.beginGroup("view" + QString::number(views++));
-				view->save_settings(settings);
-				settings.endGroup();
-			}
+	// Restore views
+	int views = settings.value("views").toInt();
+
+	for (int i = 0; i < views; i++) {
+		settings.beginGroup("view" + QString::number(i));
+
+		if (i > 0) {
+			views::ViewType type = (views::ViewType)settings.value("type").toInt();
+			add_view(type, this);
+			views_.back()->restore_settings(settings);
+		} else
+			main_view_->restore_settings(settings);
+
+		settings.endGroup();
+	}
+
+	// Restore meta objects like markers and cursors
+	int meta_objs = settings.value("meta_objs").toInt();
+
+	for (int i = 0; i < meta_objs; i++) {
+		settings.beginGroup("meta_obj" + QString::number(i));
+
+		shared_ptr<views::ViewBase> vb;
+		shared_ptr<views::trace::View> tv;
+		if (settings.contains("assoc_view"))
+			vb = views_.at(settings.value("assoc_view").toInt());
+
+		if (vb)
+			tv = dynamic_pointer_cast<views::trace::View>(vb);
+
+		const QString type = settings.value("type").toString();
+
+		if ((type == "time_marker") && tv) {
+			Timestamp ts = GlobalSettings::restore_timestamp(settings, "time");
+			shared_ptr<views::trace::Flag> flag = tv->add_flag(ts);
+			flag->set_text(settings.value("text").toString());
+		}
+
+		if ((type == "selection") && tv) {
+			Timestamp start = GlobalSettings::restore_timestamp(settings, "start_time");
+			Timestamp end = GlobalSettings::restore_timestamp(settings, "end_time");
+			tv->set_cursors(start, end);
+			tv->show_cursors();
 		}
 
-		settings.setValue("views", views);
+		settings.endGroup();
 	}
 }
 
@@ -262,7 +433,7 @@ void Session::restore_settings(QSettings &settings)
 {
 	shared_ptr<devices::Device> device;
 
-	QString device_type = settings.value("device_type").toString();
+	const QString device_type = settings.value("device_type").toString();
 
 	if (device_type == "hardware") {
 		map<string, string> dev_info;
@@ -270,11 +441,11 @@ void Session::restore_settings(QSettings &settings)
 
 		// Re-select last used device if possible but only if it's not demo
 		settings.beginGroup("device");
-		key_list.push_back("vendor");
-		key_list.push_back("model");
-		key_list.push_back("version");
-		key_list.push_back("serial_num");
-		key_list.push_back("connection_id");
+		key_list.emplace_back("vendor");
+		key_list.emplace_back("model");
+		key_list.emplace_back("version");
+		key_list.emplace_back("serial_num");
+		key_list.emplace_back("connection_id");
 
 		for (string key : key_list) {
 			const QString k = QString::fromStdString(key);
@@ -283,7 +454,7 @@ void Session::restore_settings(QSettings &settings)
 
 			const string value = settings.value(k).toString().toStdString();
 			if (!value.empty())
-				dev_info.insert(std::make_pair(key, value));
+				dev_info.insert(make_pair(key, value));
 		}
 
 		if (dev_info.count("model") > 0)
@@ -295,61 +466,48 @@ void Session::restore_settings(QSettings &settings)
 		settings.endGroup();
 	}
 
-	if (device_type == "sessionfile") {
-		settings.beginGroup("device");
-		QString filename = settings.value("filename").toString();
-		settings.endGroup();
-
-		if (QFileInfo(filename).isReadable()) {
-			device = std::make_shared<devices::SessionFile>(device_manager_.context(),
-				filename.toStdString());
-			set_device(device);
 
-			// TODO Perform error handling
-			start_capture([](QString infoMessage) { (void)infoMessage; });
+	QString filename;
+	if ((device_type == "sessionfile") || (device_type == "inputfile")) {
+		if (device_type == "sessionfile") {
+			settings.beginGroup("device");
+			filename = settings.value("filename").toString();
+			settings.endGroup();
 
-			set_name(QFileInfo(filename).fileName());
+			if (QFileInfo(filename).isReadable())
+				device = make_shared<devices::SessionFile>(device_manager_.context(),
+					filename.toStdString());
 		}
-	}
 
-	if (device) {
-		// Restore channels
-		for (shared_ptr<data::SignalBase> base : signalbases_) {
-			settings.beginGroup(base->internal_name());
-			base->restore_settings(settings);
+		if (device_type == "inputfile") {
+			settings.beginGroup("device");
+			device = make_shared<devices::InputFile>(device_manager_.context(),
+				settings);
 			settings.endGroup();
 		}
 
-		// Restore decoders
-#ifdef ENABLE_DECODE
-		int stacks = settings.value("decoder_stacks").toInt();
-
-		for (int i = 0; i < stacks; i++) {
-			settings.beginGroup("decoder_stack" + QString::number(i++));
-
-			QString id = settings.value("id").toString();
-			add_decoder(srd_decoder_get_by_id(id.toStdString().c_str()));
-
-			settings.endGroup();
-		}
-#endif
+		if (device) {
+			set_device(device);
 
-		// Restore views
-		int views = settings.value("views").toInt();
+			start_capture([](QString infoMessage) {
+				// TODO Emulate noquote()
+				qDebug() << "Session error:" << infoMessage; });
 
-		for (int i = 0; i < views; i++) {
-			settings.beginGroup("view" + QString::number(i));
+			set_name(QString::fromStdString(
+				dynamic_pointer_cast<devices::File>(device)->display_name(device_manager_)));
 
-			if (i > 0) {
-				views::ViewType type = (views::ViewType)settings.value("type").toInt();
-				add_view(name_, type, this);
-				views_.back()->restore_settings(settings);
-			} else
-				main_view_->restore_settings(settings);
+			if (!filename.isEmpty()) {
+				// Only set the save path if we load an srzip file
+				if (device_type == "sessionfile")
+					set_save_path(QFileInfo(filename).absolutePath());
 
-			settings.endGroup();
+				set_name(QFileInfo(filename).fileName());
+			}
 		}
 	}
+
+	if (device)
+		restore_setup(settings);
 }
 
 void Session::select_device(shared_ptr<devices::Device> device)
@@ -360,8 +518,7 @@ void Session::select_device(shared_ptr<devices::Device> device)
 		else
 			set_default_device();
 	} catch (const QString &e) {
-		main_bar_->session_error(tr("Failed to Select Device"),
-			tr("Failed to Select Device"));
+		MainWindow::show_session_error(tr("Failed to select device"), e);
 	}
 }
 
@@ -377,24 +534,33 @@ void Session::set_device(shared_ptr<devices::Device> device)
 
 	device_.reset();
 
-	// Revert name back to default name (e.g. "Untitled-1") as the data is gone
+	// Revert name back to default name (e.g. "Session 1") as the data is gone
 	name_ = default_name_;
 	name_changed();
 
-	// Remove all stored data
-	for (std::shared_ptr<views::ViewBase> view : views_) {
-		view->clear_signals();
+	// Remove all stored data and reset all views
+	for (shared_ptr<views::ViewBase> view : views_) {
+		view->clear_signalbases();
 #ifdef ENABLE_DECODE
 		view->clear_decode_signals();
 #endif
+		view->reset_view_state();
+	}
+
+	for (SignalGroup* group : signal_groups_) {
+		group->clear();
+		delete group;
 	}
-	for (const shared_ptr<data::SignalData> d : all_signal_data_)
+	signal_groups_.clear();
+
+	for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 		d->clear();
+
 	all_signal_data_.clear();
 	signalbases_.clear();
 	cur_logic_segment_.reset();
 
-	for (auto entry : cur_analog_segments_) {
+	for (auto& entry : cur_analog_segments_) {
 		shared_ptr<sigrok::Channel>(entry.first).reset();
 		shared_ptr<data::AnalogSegment>(entry.second).reset();
 	}
@@ -403,22 +569,24 @@ void Session::set_device(shared_ptr<devices::Device> device)
 
 	signals_changed();
 
-	device_ = std::move(device);
+	device_ = move(device);
 
 	try {
 		device_->open();
 	} catch (const QString &e) {
 		device_.reset();
-		device_changed();
-		throw;
+		MainWindow::show_session_error(tr("Failed to open device"), e);
 	}
 
-	device_->session()->add_datafeed_callback([=]
-		(shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
-			data_feed_in(device, packet);
-		});
+	if (device_) {
+		device_->session()->add_datafeed_callback([=]
+			(shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
+				data_feed_in(device, packet);
+			});
+
+		update_signals();
+	}
 
-	update_signals();
 	device_changed();
 }
 
@@ -431,43 +599,111 @@ void Session::set_default_device()
 		return;
 
 	// Try and find the demo device and select that by default
-	const auto iter = std::find_if(devices.begin(), devices.end(),
+	const auto iter = find_if(devices.begin(), devices.end(),
 		[] (const shared_ptr<devices::HardwareDevice> &d) {
-			return d->hardware_device()->driver()->name() ==
-			"demo";	});
+			return d->hardware_device()->driver()->name() == "demo"; });
 	set_device((iter == devices.end()) ? devices.front() : *iter);
 }
 
-void Session::load_init_file(const std::string &file_name,
-	const std::string &format)
+bool Session::using_file_device() const
+{
+	shared_ptr<devices::SessionFile> sessionfile_device =
+		dynamic_pointer_cast<devices::SessionFile>(device_);
+
+	shared_ptr<devices::InputFile> inputfile_device =
+		dynamic_pointer_cast<devices::InputFile>(device_);
+
+	return (sessionfile_device || inputfile_device);
+}
+
+/**
+ * Convert generic options to data types that are specific to InputFormat.
+ *
+ * @param[in] user_spec Vector of tokenized words, string format.
+ * @param[in] fmt_opts Input format's options, result of InputFormat::options().
+ *
+ * @return Map of options suitable for InputFormat::create_input().
+ */
+map<string, Glib::VariantBase>
+Session::input_format_options(vector<string> user_spec,
+		map<string, shared_ptr<Option>> fmt_opts)
+{
+	map<string, Glib::VariantBase> result;
+
+	for (auto& entry : user_spec) {
+		/*
+		 * Split key=value specs. Accept entries without separator
+		 * (for simplified boolean specifications).
+		 */
+		string key, val;
+		size_t pos = entry.find("=");
+		if (pos == std::string::npos) {
+			key = entry;
+			val = "";
+		} else {
+			key = entry.substr(0, pos);
+			val = entry.substr(pos + 1);
+		}
+
+		/*
+		 * Skip user specifications that are not a member of the
+		 * format's set of supported options. Have the text input
+		 * spec converted to the required input format specific
+		 * data type.
+		 */
+		auto found = fmt_opts.find(key);
+		if (found == fmt_opts.end()) {
+			qCritical() << "Supplied input option" << QString::fromStdString(key) <<
+				"is not a valid option for this input module, it will be ignored!";
+			continue;
+		}
+
+		shared_ptr<Option> opt = found->second;
+		result[key] = opt->parse_string(val);
+	}
+
+	return result;
+}
+
+void Session::load_init_file(const string &file_name,
+	const string &format, const string &setup_file_name)
 {
 	shared_ptr<InputFormat> input_format;
+	map<string, Glib::VariantBase> input_opts;
 
 	if (!format.empty()) {
 		const map<string, shared_ptr<InputFormat> > formats =
 			device_manager_.context()->input_formats();
+		auto user_opts = pv::util::split_string(format, ":");
+		string user_name = user_opts.front();
+		user_opts.erase(user_opts.begin());
 		const auto iter = find_if(formats.begin(), formats.end(),
 			[&](const pair<string, shared_ptr<InputFormat> > f) {
-				return f.first == format; });
+				return f.first == user_name; });
 		if (iter == formats.end()) {
-			main_bar_->session_error(tr("Error"),
-				tr("Unexpected input format: %s").arg(QString::fromStdString(format)));
+			MainWindow::show_session_error(tr("Error"),
+				tr("Unexpected input format: %1").arg(QString::fromStdString(format)));
 			return;
 		}
-
 		input_format = (*iter).second;
+		input_opts = input_format_options(user_opts,
+			input_format->options());
 	}
 
-	load_file(QString::fromStdString(file_name), input_format);
+	load_file(QString::fromStdString(file_name), QString::fromStdString(setup_file_name),
+		input_format, input_opts);
 }
 
-void Session::load_file(QString file_name,
-	std::shared_ptr<sigrok::InputFormat> format,
-	const std::map<std::string, Glib::VariantBase> &options)
+void Session::load_file(QString file_name, QString setup_file_name,
+	shared_ptr<sigrok::InputFormat> format, const map<string, Glib::VariantBase> &options)
 {
 	const QString errorMessage(
 		QString("Failed to load file %1").arg(file_name));
 
+	// In the absence of a caller's format spec, try to auto detect.
+	// Assume "sigrok session file" upon lookup miss.
+	if (!format)
+		format = device_manager_.context()->input_format_match(file_name.toStdString());
 	try {
 		if (format)
 			set_device(shared_ptr<devices::Device>(
@@ -480,17 +716,33 @@ void Session::load_file(QString file_name,
 				new devices::SessionFile(
 					device_manager_.context(),
 					file_name.toStdString())));
-	} catch (Error e) {
-		main_bar_->session_error(tr("Failed to load ") + file_name, e.what());
+	} catch (Error& e) {
+		MainWindow::show_session_error(tr("Failed to load %1").arg(file_name), e.what());
 		set_default_device();
 		main_bar_->update_device_list();
 		return;
 	}
 
+	// Use the input file with .pvs extension if no setup file was given
+	if (setup_file_name.isEmpty()) {
+		setup_file_name = file_name;
+		setup_file_name.truncate(setup_file_name.lastIndexOf('.'));
+		setup_file_name.append(".pvs");
+	}
+
+	if (QFileInfo::exists(setup_file_name) && QFileInfo(setup_file_name).isReadable()) {
+		QSettings settings_storage(setup_file_name, QSettings::IniFormat);
+		restore_setup(settings_storage);
+	}
+
 	main_bar_->update_device_list();
 
 	start_capture([&, errorMessage](QString infoMessage) {
-		main_bar_->session_error(errorMessage, infoMessage); });
+		MainWindow::show_session_error(errorMessage, infoMessage); });
+
+	// Only set save path if we loaded an srzip file
+	if (dynamic_pointer_cast<devices::SessionFile>(device_))
+		set_save_path(QFileInfo(file_name).absolutePath());
 
 	set_name(QFileInfo(file_name).fileName());
 }
@@ -514,7 +766,7 @@ void Session::start_capture(function<void (const QString)> error_handler)
 	const shared_ptr<sigrok::Device> sr_dev = device_->device();
 	if (sr_dev) {
 		const auto channels = sr_dev->channels();
-		if (!std::any_of(channels.begin(), channels.end(),
+		if (!any_of(channels.begin(), channels.end(),
 			[](shared_ptr<Channel> channel) {
 				return channel->enabled(); })) {
 			error_handler(tr("No channels enabled."));
@@ -523,12 +775,21 @@ void Session::start_capture(function<void (const QString)> error_handler)
 	}
 
 	// Clear signal data
-	for (const shared_ptr<data::SignalData> d : all_signal_data_)
+	for (const shared_ptr<data::SignalData>& d : all_signal_data_)
 		d->clear();
 
-	// Revert name back to default name (e.g. "Untitled-1") as the data is gone
-	name_ = default_name_;
-	name_changed();
+	trigger_list_.clear();
+	segment_sample_count_.clear();
+
+	// Revert name back to default name (e.g. "Session 1") for real devices
+	// as the (possibly saved) data is gone. File devices keep their name.
+	shared_ptr<devices::HardwareDevice> hw_device =
+		dynamic_pointer_cast< devices::HardwareDevice >(device_);
+
+	if (hw_device) {
+		name_ = default_name_;
+		name_changed();
+	}
 
 	// Begin the session
 	sampling_thread_ = std::thread(
@@ -545,21 +806,50 @@ void Session::stop_capture()
 		sampling_thread_.join();
 }
 
-void Session::register_view(std::shared_ptr<views::ViewBase> view)
+void Session::register_view(shared_ptr<views::ViewBase> view)
 {
-	if (views_.empty()) {
+	if (views_.empty())
 		main_view_ = view;
-	}
 
 	views_.push_back(view);
 
+	// Add all device signals
 	update_signals();
+
+	// Add all other signals
+	vector< shared_ptr<data::SignalBase> > view_signalbases = view->signalbases();
+
+	for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
+		const int sb_exists = count_if(
+			view_signalbases.cbegin(), view_signalbases.cend(),
+			[&](const shared_ptr<data::SignalBase> &sb) {
+				return sb == signalbase;
+			});
+
+		// Add the signal to the view if it doesn't have it yet
+		if (!sb_exists)
+			switch (signalbase->type()) {
+			case data::SignalBase::AnalogChannel:
+			case data::SignalBase::LogicChannel:
+			case data::SignalBase::MathChannel:
+				view->add_signalbase(signalbase);
+				break;
+			case data::SignalBase::DecodeChannel:
+#ifdef ENABLE_DECODE
+				view->add_decode_signal(dynamic_pointer_cast<data::DecodeSignal>(signalbase));
+#endif
+				break;
+			}
+	}
+
+	signals_changed();
 }
 
-void Session::deregister_view(std::shared_ptr<views::ViewBase> view)
+void Session::deregister_view(shared_ptr<views::ViewBase> view)
 {
-	views_.remove_if([&](std::shared_ptr<views::ViewBase> v) {
-		return v == view; });
+	views_.erase(std::remove_if(views_.begin(), views_.end(),
+		[&](shared_ptr<views::ViewBase> v) { return v == view; }),
+		views_.end());
 
 	if (views_.empty()) {
 		main_view_.reset();
@@ -569,9 +859,9 @@ void Session::deregister_view(std::shared_ptr<views::ViewBase> view)
 	}
 }
 
-bool Session::has_view(std::shared_ptr<views::ViewBase> view)
+bool Session::has_view(shared_ptr<views::ViewBase> view)
 {
-	for (std::shared_ptr<views::ViewBase> v : views_)
+	for (shared_ptr<views::ViewBase>& v : views_)
 		if (v == view)
 			return true;
 
@@ -582,12 +872,12 @@ double Session::get_samplerate() const
 {
 	double samplerate = 0.0;
 
-	for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
+	for (const shared_ptr<pv::data::SignalData>& d : all_signal_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());
+		for (const shared_ptr<pv::data::Segment>& s : segments)
+			samplerate = max(samplerate, s->samplerate());
 	}
 	// If there is no sample rate given we use samples as unit
 	if (samplerate == 0.0)
@@ -596,81 +886,137 @@ double Session::get_samplerate() const
 	return samplerate;
 }
 
-const std::unordered_set< std::shared_ptr<data::SignalBase> >
-	Session::signalbases() const
+uint32_t Session::get_highest_segment_id() const
+{
+	return highest_segment_id_;
+}
+
+uint64_t Session::get_segment_sample_count(uint32_t segment_id) const
+{
+	if (segment_id < segment_sample_count_.size())
+		return segment_sample_count_[segment_id];
+	else
+		return 0;
+}
+
+vector<util::Timestamp> Session::get_triggers(uint32_t segment_id) const
+{
+	vector<util::Timestamp> result;
+
+	for (const pair<uint32_t, util::Timestamp>& entry : trigger_list_)
+		if (entry.first == segment_id)
+			result.push_back(entry.second);
+
+	return result;
+}
+
+const vector< shared_ptr<data::SignalBase> > Session::signalbases() const
 {
 	return signalbases_;
 }
 
-#ifdef ENABLE_DECODE
-bool Session::add_decoder(srd_decoder *const dec)
+uint32_t Session::get_signal_count(data::SignalBase::ChannelType type) const
+{
+	return count_if(signalbases_.begin(), signalbases_.end(),
+		[&] (shared_ptr<SignalBase> sb) { return sb->type() == type; });
+}
+
+uint32_t Session::get_next_signal_index(data::SignalBase::ChannelType type)
 {
-	map<const srd_channel*, shared_ptr<data::SignalBase> > channels;
-	shared_ptr<data::DecoderStack> decoder_stack;
+	next_index_list_[type]++;
+	return next_index_list_[type];
+}
 
-	try {
-		// Create the decoder
-		decoder_stack = shared_ptr<data::DecoderStack>(
-			new data::DecoderStack(*this, dec));
-
-		// Make a list of all the channels
-		std::vector<const srd_channel*> all_channels;
-		for (const GSList *i = dec->channels; i; i = i->next)
-			all_channels.push_back((const srd_channel*)i->data);
-		for (const GSList *i = dec->opt_channels; i; i = i->next)
-			all_channels.push_back((const srd_channel*)i->data);
-
-		// Auto select the initial channels
-		for (const srd_channel *pdch : all_channels)
-			for (shared_ptr<data::SignalBase> b : signalbases_) {
-				if (b->type() == ChannelType::LOGIC) {
-					if (QString::fromUtf8(pdch->name).toLower().
-						contains(b->name().toLower()))
-						channels[pdch] = b;
-				}
-			}
+void Session::add_generated_signal(shared_ptr<data::SignalBase> signal)
+{
+	signalbases_.push_back(signal);
+
+	for (shared_ptr<views::ViewBase>& view : views_)
+		view->add_signalbase(signal);
+
+	update_signals();
+}
+
+void Session::remove_generated_signal(shared_ptr<data::SignalBase> signal)
+{
+	if (shutting_down_)
+		return;
+
+	signalbases_.erase(std::remove_if(signalbases_.begin(), signalbases_.end(),
+		[&](shared_ptr<data::SignalBase> s) { return s == signal; }),
+		signalbases_.end());
+
+	for (shared_ptr<views::ViewBase>& view : views_)
+		view->remove_signalbase(signal);
+
+	update_signals();
+}
 
-		assert(decoder_stack);
-		assert(!decoder_stack->stack().empty());
-		assert(decoder_stack->stack().front());
-		decoder_stack->stack().front()->set_channels(channels);
+#ifdef ENABLE_DECODE
+shared_ptr<data::DecodeSignal> Session::add_decode_signal()
+{
+	shared_ptr<data::DecodeSignal> signal;
 
+	try {
 		// Create the decode signal
-		shared_ptr<data::SignalBase> signalbase =
-			shared_ptr<data::SignalBase>(new data::SignalBase(nullptr));
+		signal = make_shared<data::DecodeSignal>(*this);
 
-		signalbase->set_decoder_stack(decoder_stack);
-		signalbases_.insert(signalbase);
+		signalbases_.push_back(signal);
 
-		for (std::shared_ptr<views::ViewBase> view : views_)
-			view->add_decode_signal(signalbase);
-	} catch (std::runtime_error e) {
-		return false;
+		// Add the decode signal to all views
+		for (shared_ptr<views::ViewBase>& view : views_)
+			view->add_decode_signal(signal);
+	} catch (runtime_error& e) {
+		remove_decode_signal(signal);
+		return nullptr;
 	}
 
 	signals_changed();
 
-	// Do an initial decode
-	decoder_stack->begin_decode();
-
-	return true;
+	return signal;
 }
 
-void Session::remove_decode_signal(shared_ptr<data::SignalBase> signalbase)
+void Session::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
 {
-	signalbases_.erase(signalbase);
+	if (shutting_down_)
+		return;
+
+	signalbases_.erase(std::remove_if(signalbases_.begin(), signalbases_.end(),
+		[&](shared_ptr<data::SignalBase> s) { return s == signal; }),
+		signalbases_.end());
 
-	for (std::shared_ptr<views::ViewBase> view : views_)
-		view->remove_decode_signal(signalbase);
+	for (shared_ptr<views::ViewBase>& view : views_)
+		view->remove_decode_signal(signal);
 
 	signals_changed();
 }
 #endif
 
+bool Session::all_segments_complete(uint32_t segment_id) const
+{
+	bool all_complete = true;
+
+	for (const shared_ptr<data::SignalBase>& base : signalbases_)
+		if (!base->segment_is_complete(segment_id))
+			all_complete = false;
+
+	return all_complete;
+}
+
+MetadataObjManager* Session::metadata_obj_manager()
+{
+	return &metadata_obj_manager_;
+}
+
 void Session::set_capture_state(capture_state state)
 {
 	bool changed;
 
+	if (state == Running)
+		acq_time_.restart();
+	if (state == Stopped)
+		qDebug("Acquisition took %.2f s", acq_time_.elapsed() / 1000.);
+
 	{
 		lock_guard<mutex> lock(sampling_mutex_);
 		changed = capture_state_ != state;
@@ -686,8 +1032,8 @@ void Session::update_signals()
 	if (!device_) {
 		signalbases_.clear();
 		logic_data_.reset();
-		for (std::shared_ptr<views::ViewBase> view : views_) {
-			view->clear_signals();
+		for (shared_ptr<views::ViewBase>& view : views_) {
+			view->clear_signalbases();
 #ifdef ENABLE_DECODE
 			view->clear_decode_signals();
 #endif
@@ -701,8 +1047,8 @@ void Session::update_signals()
 	if (!sr_dev) {
 		signalbases_.clear();
 		logic_data_.reset();
-		for (std::shared_ptr<views::ViewBase> view : views_) {
-			view->clear_signals();
+		for (shared_ptr<views::ViewBase>& view : views_) {
+			view->clear_signalbases();
 #ifdef ENABLE_DECODE
 			view->clear_decode_signals();
 #endif
@@ -712,12 +1058,12 @@ void Session::update_signals()
 
 	// Detect what data types we will receive
 	auto channels = sr_dev->channels();
-	unsigned int logic_channel_count = std::count_if(
+	unsigned int logic_channel_count = count_if(
 		channels.begin(), channels.end(),
 		[] (shared_ptr<Channel> channel) {
-			return channel->type() == ChannelType::LOGIC; });
+			return channel->type() == sigrok::ChannelType::LOGIC; });
 
-	// Create data containers for the logic data segments
+	// Create a common data container for the logic signalbases
 	{
 		lock_guard<recursive_mutex> data_lock(data_mutex_);
 
@@ -725,85 +1071,96 @@ void Session::update_signals()
 			logic_data_.reset();
 		} else if (!logic_data_ ||
 			logic_data_->num_channels() != logic_channel_count) {
-			logic_data_.reset(new data::Logic(
-				logic_channel_count));
+			logic_data_.reset(new data::Logic(logic_channel_count));
 			assert(logic_data_);
 		}
 	}
 
-	// Make the signals list
-	for (std::shared_ptr<views::ViewBase> viewbase : views_) {
-		views::TraceView::View *trace_view =
-			qobject_cast<views::TraceView::View*>(viewbase.get());
-
-		if (trace_view) {
-			unordered_set< shared_ptr<views::TraceView::Signal> >
-				prev_sigs(trace_view->signals());
-			trace_view->clear_signals();
-
-			for (auto channel : sr_dev->channels()) {
-				shared_ptr<data::SignalBase> signalbase;
-				shared_ptr<views::TraceView::Signal> signal;
-
-				// Find the channel in the old signals
-				const auto iter = std::find_if(
-					prev_sigs.cbegin(), prev_sigs.cend(),
-					[&](const shared_ptr<views::TraceView::Signal> &s) {
-						return s->base()->channel() == channel;
-					});
-				if (iter != prev_sigs.end()) {
-					// Copy the signal from the old set to the new
-					signal = *iter;
-					trace_view->add_signal(signal);
-				} else {
-					// Find the signalbase for this channel if possible
-					signalbase.reset();
-					for (const shared_ptr<data::SignalBase> b : signalbases_)
-						if (b->channel() == channel)
-							signalbase = b;
-
-					switch(channel->type()->id()) {
-					case SR_CHANNEL_LOGIC:
-						if (!signalbase) {
-							signalbase = shared_ptr<data::SignalBase>(
-								new data::SignalBase(channel));
-							signalbases_.insert(signalbase);
-
-							all_signal_data_.insert(logic_data_);
-							signalbase->set_data(logic_data_);
-						}
-
-						signal = shared_ptr<views::TraceView::Signal>(
-							new views::TraceView::LogicSignal(*this,
-								device_, signalbase));
-						trace_view->add_signal(signal);
-						break;
+	// Create signalbases if necessary
+	for (auto channel : sr_dev->channels()) {
 
-					case SR_CHANNEL_ANALOG:
-					{
-						if (!signalbase) {
-							signalbase = shared_ptr<data::SignalBase>(
-								new data::SignalBase(channel));
-							signalbases_.insert(signalbase);
-
-							shared_ptr<data::Analog> data(new data::Analog());
-							all_signal_data_.insert(data);
-							signalbase->set_data(data);
-						}
-
-						signal = shared_ptr<views::TraceView::Signal>(
-							new views::TraceView::AnalogSignal(
-								*this, signalbase));
-						trace_view->add_signal(signal);
-						break;
-					}
+		// Try to find the channel in the list of existing signalbases
+		const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
+			[&](const shared_ptr<SignalBase> &sb) { return sb->channel() == channel; });
+
+		// Not found, let's make a signalbase for it
+		if (iter == signalbases_.cend()) {
+			shared_ptr<SignalBase> signalbase;
+			switch(channel->type()->id()) {
+			case SR_CHANNEL_LOGIC:
+				signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::LogicChannel);
+				signalbases_.push_back(signalbase);
+
+				all_signal_data_.insert(logic_data_);
+				signalbase->set_data(logic_data_);
+
+				connect(this, SIGNAL(capture_state_changed(int)),
+					signalbase.get(), SLOT(on_capture_state_changed(int)));
+				break;
 
-					default:
-						assert(0);
+			case SR_CHANNEL_ANALOG:
+				signalbase = make_shared<data::SignalBase>(channel, data::SignalBase::AnalogChannel);
+				signalbases_.push_back(signalbase);
+
+				shared_ptr<data::Analog> data(new data::Analog());
+				all_signal_data_.insert(data);
+				signalbase->set_data(data);
+
+				connect(this, SIGNAL(capture_state_changed(int)),
+					signalbase.get(), SLOT(on_capture_state_changed(int)));
+				break;
+			}
+		}
+	}
+
+	// Create and assign default signal groups if needed
+	if (signal_groups_.empty()) {
+		for (auto& entry : sr_dev->channel_groups()) {
+			const shared_ptr<sigrok::ChannelGroup>& group = entry.second;
+
+			if (group->channels().size() <= 1)
+				continue;
+
+			SignalGroup* sg = new SignalGroup(QString::fromStdString(entry.first));
+			for (const shared_ptr<sigrok::Channel>& channel : group->channels()) {
+				for (shared_ptr<data::SignalBase> s : signalbases_) {
+					if (s->channel() == channel) {
+						sg->append_signal(s);
 						break;
 					}
 				}
 			}
+			signal_groups_.emplace_back(sg);
+		}
+	}
+
+	// Update all views
+	for (shared_ptr<views::ViewBase>& viewbase : views_) {
+		vector< shared_ptr<SignalBase> > view_signalbases =
+				viewbase->signalbases();
+
+		// Add all non-decode signalbases that don't yet exist in the view
+		for (shared_ptr<SignalBase>& session_sb : signalbases_) {
+			if (session_sb->type() == SignalBase::DecodeChannel)
+				continue;
+
+			const auto iter = find_if(view_signalbases.cbegin(), view_signalbases.cend(),
+				[&](const shared_ptr<SignalBase> &sb) { return sb == session_sb; });
+
+			if (iter == view_signalbases.cend())
+				viewbase->add_signalbase(session_sb);
+		}
+
+		// Remove all non-decode signalbases that no longer exist
+		for (shared_ptr<SignalBase>& view_sb : view_signalbases) {
+			if (view_sb->type() == SignalBase::DecodeChannel)
+				continue;
+
+			const auto iter = find_if(signalbases_.cbegin(), signalbases_.cend(),
+				[&](const shared_ptr<SignalBase> &sb) {	return sb == view_sb; });
+
+			if (iter == signalbases_.cend())
+				viewbase->remove_signalbase(view_sb);
 		}
 	}
 
@@ -825,16 +1182,59 @@ void Session::sample_thread_proc(function<void (const QString)> error_handler)
 {
 	assert(error_handler);
 
+#ifdef ENABLE_FLOW
+	pipeline_ = Pipeline::create();
+
+	source_ = ElementFactory::create_element("filesrc", "source");
+	sink_ = RefPtr<AppSink>::cast_dynamic(ElementFactory::create_element("appsink", "sink"));
+
+	pipeline_->add(source_)->add(sink_);
+	source_->link(sink_);
+
+	source_->set_property("location", Glib::ustring("/tmp/dummy_binary"));
+
+	sink_->set_property("emit-signals", TRUE);
+	sink_->signal_new_sample().connect(sigc::mem_fun(*this, &Session::on_gst_new_sample));
+
+	// Get the bus from the pipeline and add a bus watch to the default main context
+	RefPtr<Bus> bus = pipeline_->get_bus();
+	bus->add_watch(sigc::mem_fun(this, &Session::on_gst_bus_message));
+
+	// Start pipeline and Wait until it finished processing
+	pipeline_done_interrupt_ = false;
+	pipeline_->set_state(Gst::STATE_PLAYING);
+
+	unique_lock<mutex> pipeline_done_lock_(pipeline_done_mutex_);
+	pipeline_done_cond_.wait(pipeline_done_lock_);
+
+	// Let the pipeline free all resources
+	pipeline_->set_state(Gst::STATE_NULL);
+
+#else
 	if (!device_)
 		return;
 
-	cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
+	try {
+		cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
+	} catch (Error& e) {
+		cur_samplerate_ = 0;
+	}
 
 	out_of_memory_ = false;
 
+	{
+		lock_guard<recursive_mutex> lock(data_mutex_);
+		cur_logic_segment_.reset();
+		cur_analog_segments_.clear();
+		for (shared_ptr<data::SignalBase> sb : signalbases_)
+			sb->clear_sample_data();
+	}
+	highest_segment_id_ = -1;
+	frame_began_ = false;
+
 	try {
 		device_->start();
-	} catch (Error e) {
+	} catch (Error& e) {
 		error_handler(e.what());
 		return;
 	}
@@ -842,38 +1242,158 @@ void Session::sample_thread_proc(function<void (const QString)> error_handler)
 	set_capture_state(device_->session()->trigger() ?
 		AwaitingTrigger : Running);
 
-	device_->run();
+	try {
+		device_->run();
+	} catch (Error& e) {
+		error_handler(e.what());
+		set_capture_state(Stopped);
+		return;
+	} catch (QString& e) {
+		error_handler(e);
+		set_capture_state(Stopped);
+		return;
+	}
+
 	set_capture_state(Stopped);
 
 	// Confirm that SR_DF_END was received
-	if (cur_logic_segment_) {
-		qDebug("SR_DF_END was not received.");
-		assert(0);
-	}
+	if (cur_logic_segment_)
+		qDebug() << "WARNING: SR_DF_END was not received.";
+#endif
+
+	// Optimize memory usage
+	free_unused_memory();
+
+	// We now have unsaved data unless we just "captured" from a file
+	shared_ptr<devices::File> file_device =
+		dynamic_pointer_cast<devices::File>(device_);
+
+	if (!file_device)
+		data_saved_ = false;
 
 	if (out_of_memory_)
 		error_handler(tr("Out of memory, acquisition stopped."));
 }
 
+void Session::free_unused_memory()
+{
+	for (const shared_ptr<data::SignalData>& data : all_signal_data_) {
+		const vector< shared_ptr<data::Segment> > segments = data->segments();
+
+		for (const shared_ptr<data::Segment>& segment : segments)
+			segment->free_unused_memory();
+	}
+}
+
+void Session::signal_new_segment()
+{
+	int new_segment_id = 0;
+
+	if ((cur_logic_segment_ != nullptr) || !cur_analog_segments_.empty()) {
+
+		// Determine new frame/segment number, assuming that all
+		// signals have the same number of frames/segments
+		if (cur_logic_segment_) {
+			new_segment_id = logic_data_->get_segment_count() - 1;
+		} else {
+			shared_ptr<sigrok::Channel> any_channel =
+				(*cur_analog_segments_.begin()).first;
+
+			shared_ptr<data::SignalBase> base = signalbase_from_channel(any_channel);
+			assert(base);
+
+			shared_ptr<data::Analog> data(base->analog_data());
+			assert(data);
+
+			new_segment_id = data->get_segment_count() - 1;
+		}
+	}
+
+	if (new_segment_id > highest_segment_id_) {
+		highest_segment_id_ = new_segment_id;
+		segment_sample_count_.emplace_back(0);
+		new_segment(highest_segment_id_);
+	}
+}
+
+void Session::signal_segment_completed()
+{
+	int segment_id = 0;
+
+	for (const shared_ptr<data::SignalBase>& signalbase : signalbases_) {
+		// We only care about analog and logic channels, not derived ones
+		if (signalbase->type() == data::SignalBase::AnalogChannel) {
+			segment_id = signalbase->analog_data()->get_segment_count() - 1;
+			break;
+		}
+
+		if (signalbase->type() == data::SignalBase::LogicChannel) {
+			segment_id = signalbase->logic_data()->get_segment_count() - 1;
+			break;
+		}
+	}
+
+	if (segment_id >= 0)
+		segment_completed(segment_id);
+}
+
+#ifdef ENABLE_FLOW
+bool Session::on_gst_bus_message(const Glib::RefPtr<Gst::Bus>& bus, const Glib::RefPtr<Gst::Message>& message)
+{
+	(void)bus;
+
+	if ((message->get_source() == pipeline_) && \
+		((message->get_message_type() == Gst::MESSAGE_EOS)))
+		pipeline_done_cond_.notify_one();
+
+	// TODO Also evaluate MESSAGE_STREAM_STATUS to receive error notifications
+
+	return true;
+}
+
+Gst::FlowReturn Session::on_gst_new_sample()
+{
+	RefPtr<Gst::Sample> sample = sink_->pull_sample();
+	RefPtr<Gst::Buffer> buf = sample->get_buffer();
+
+	for (uint32_t block_id = 0; block_id < buf->n_memory(); block_id++) {
+		RefPtr<Gst::Memory> buf_mem = buf->get_memory(block_id);
+		Gst::MapInfo mapinfo;
+		buf_mem->map(mapinfo, Gst::MAP_READ);
+
+		shared_ptr<sigrok::Packet> logic_packet =
+			sr_context->create_logic_packet(mapinfo.get_data(), buf->get_size(), 1);
+
+		try {
+			feed_in_logic(dynamic_pointer_cast<sigrok::Logic>(logic_packet->payload()));
+		} catch (bad_alloc&) {
+			out_of_memory_ = true;
+			device_->stop();
+			buf_mem->unmap(mapinfo);
+			return Gst::FLOW_ERROR;
+		}
+
+		buf_mem->unmap(mapinfo);
+	}
+
+	return Gst::FLOW_OK;
+}
+#endif
+
 void Session::feed_in_header()
 {
-	cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
+	// Nothing to do here for now
 }
 
 void Session::feed_in_meta(shared_ptr<Meta> meta)
 {
-	for (auto entry : meta->config()) {
+	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
+			cur_samplerate_ = g_variant_get_uint64(entry.second.gobj());
 			break;
 		default:
-			// Unknown metadata is not an error.
+			qDebug() << "Received meta data key" << entry.first->id() << ", ignoring.";
 			break;
 		}
 	}
@@ -887,7 +1407,7 @@ void Session::feed_in_trigger()
 	uint64_t sample_count = 0;
 
 	{
-		for (const shared_ptr<pv::data::SignalData> d : all_signal_data_) {
+		for (const shared_ptr<pv::data::SignalData>& d : all_signal_data_) {
 			assert(d);
 			uint64_t temp_count = 0;
 
@@ -901,20 +1421,74 @@ void Session::feed_in_trigger()
 		}
 	}
 
-	trigger_event(sample_count / get_samplerate());
+	uint32_t segment_id = 0;  // Default segment when no frames are used
+
+	// If a frame began, we'd ideally be able to use the highest segment ID for
+	// the trigger. However, as new segments are only created when logic or
+	// analog data comes in, this doesn't work if the trigger appears right
+	// after the beginning of the frame, before any sample data.
+	// For this reason, we use highest segment ID + 1 if no sample data came in
+	// yet and the highest segment ID otherwise.
+	if (frame_began_) {
+		segment_id = highest_segment_id_;
+		if (!cur_logic_segment_ && (cur_analog_segments_.size() == 0))
+			segment_id++;
+	}
+
+	// TODO Create timestamp from segment start time + segment's current sample count
+	util::Timestamp timestamp = sample_count / get_samplerate();
+	trigger_list_.emplace_back(segment_id, timestamp);
+	trigger_event(segment_id, timestamp);
 }
 
 void Session::feed_in_frame_begin()
 {
-	if (cur_logic_segment_ || !cur_analog_segments_.empty())
-		frame_began();
+	frame_began_ = true;
 }
 
-void Session::feed_in_logic(shared_ptr<Logic> logic)
+void Session::feed_in_frame_end()
 {
-	lock_guard<recursive_mutex> lock(data_mutex_);
+	if (!frame_began_)
+		return;
+
+	{
+		lock_guard<recursive_mutex> lock(data_mutex_);
+
+		if (cur_logic_segment_)
+			cur_logic_segment_->set_complete();
+
+		for (auto& entry : cur_analog_segments_) {
+			shared_ptr<data::AnalogSegment> segment = entry.second;
+			segment->set_complete();
+		}
 
-	const size_t sample_count = logic->data_length() / logic->unit_size();
+		cur_logic_segment_.reset();
+		cur_analog_segments_.clear();
+	}
+
+	frame_began_ = false;
+
+	signal_segment_completed();
+}
+
+void Session::feed_in_logic(shared_ptr<sigrok::Logic> logic)
+{
+	if (logic->data_length() == 0) {
+		qDebug() << "WARNING: Received logic packet with 0 samples.";
+		return;
+	}
+
+	if (logic->unit_size() > 8)
+		throw QString(tr("Can't handle more than 64 logic channels."));
+
+	if (!cur_samplerate_)
+		try {
+			cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
+		} catch (Error& e) {
+			// Do nothing
+		}
+
+	lock_guard<recursive_mutex> lock(data_mutex_);
 
 	if (!logic_data_) {
 		// The only reason logic_data_ would not have been created is
@@ -928,38 +1502,49 @@ void Session::feed_in_logic(shared_ptr<Logic> logic)
 		set_capture_state(Running);
 
 		// Create a new data segment
-		cur_logic_segment_ = shared_ptr<data::LogicSegment>(
-			new data::LogicSegment(
-				logic, cur_samplerate_, sample_count));
+		cur_logic_segment_ = make_shared<data::LogicSegment>(
+			*logic_data_, logic_data_->get_segment_count(),
+			logic->unit_size(), cur_samplerate_);
 		logic_data_->push_segment(cur_logic_segment_);
 
-		// @todo Putting this here means that only listeners querying
-		// for logic will be notified. Currently the only user of
-		// frame_began is DecoderStack, but in future we need to signal
-		// this after both analog and logic sweeps have begun.
-		frame_began();
-	} else {
-		// Append to the existing data segment
-		cur_logic_segment_->append_payload(logic);
+		signal_new_segment();
 	}
 
+	cur_logic_segment_->append_payload(logic);
+
+	segment_sample_count_[highest_segment_id_] =
+		max(segment_sample_count_[highest_segment_id_], cur_logic_segment_->get_sample_count());
+
 	data_received();
 }
 
-void Session::feed_in_analog(shared_ptr<Analog> analog)
+void Session::feed_in_analog(shared_ptr<sigrok::Analog> analog)
 {
+	if (analog->num_samples() == 0) {
+		qDebug() << "WARNING: Received analog packet with 0 samples.";
+		return;
+	}
+
+	if (!cur_samplerate_)
+		try {
+			cur_samplerate_ = device_->read_config<uint64_t>(ConfigKey::SAMPLERATE);
+		} catch (Error& e) {
+			// Do nothing
+		}
+
 	lock_guard<recursive_mutex> lock(data_mutex_);
 
 	const vector<shared_ptr<Channel>> channels = analog->channels();
-	const unsigned int channel_count = channels.size();
-	const size_t sample_count = analog->num_samples() / channel_count;
-	const float *data = static_cast<const float *>(analog->data_pointer());
 	bool sweep_beginning = false;
 
+	unique_ptr<float[]> data(new float[analog->num_samples() * channels.size()]);
+	analog->get_data_as_float(data.get());
+
 	if (signalbases_.empty())
 		update_signals();
 
-	for (auto channel : channels) {
+	float *channel_data = data.get();
+	for (auto& channel : channels) {
 		shared_ptr<data::AnalogSegment> segment;
 
 		// Try to get the segment of the channel
@@ -973,12 +1558,6 @@ void Session::feed_in_analog(shared_ptr<Analog> analog)
 			// in the sweep containing this segment.
 			sweep_beginning = true;
 
-			// Create a segment, keep it in the maps of channels
-			segment = shared_ptr<data::AnalogSegment>(
-				new data::AnalogSegment(
-					cur_samplerate_, sample_count));
-			cur_analog_segments_[channel] = segment;
-
 			// Find the analog data associated with the channel
 			shared_ptr<data::SignalBase> base = signalbase_from_channel(channel);
 			assert(base);
@@ -986,15 +1565,25 @@ void Session::feed_in_analog(shared_ptr<Analog> analog)
 			shared_ptr<data::Analog> data(base->analog_data());
 			assert(data);
 
+			// Create a segment, keep it in the maps of channels
+			segment = make_shared<data::AnalogSegment>(
+				*data, data->get_segment_count(), cur_samplerate_);
+			cur_analog_segments_[channel] = segment;
+
 			// Push the segment into the analog data.
 			data->push_segment(segment);
+
+			signal_new_segment();
 		}
 
 		assert(segment);
 
 		// Append the samples in the segment
-		segment->append_interleaved_samples(data++, sample_count,
-			channel_count);
+		segment->append_interleaved_samples(channel_data++, analog->num_samples(),
+			channels.size());
+
+		segment_sample_count_[highest_segment_id_] =
+			max(segment_sample_count_[highest_segment_id_], segment->get_sample_count());
 	}
 
 	if (sweep_beginning) {
@@ -1027,14 +1616,10 @@ void Session::data_feed_in(shared_ptr<sigrok::Device> device,
 		feed_in_trigger();
 		break;
 
-	case SR_DF_FRAME_BEGIN:
-		feed_in_frame_begin();
-		break;
-
 	case SR_DF_LOGIC:
 		try {
 			feed_in_logic(dynamic_pointer_cast<Logic>(packet->payload()));
-		} catch (std::bad_alloc) {
+		} catch (bad_alloc&) {
 			out_of_memory_ = true;
 			device_->stop();
 		}
@@ -1043,25 +1628,63 @@ void Session::data_feed_in(shared_ptr<sigrok::Device> device,
 	case SR_DF_ANALOG:
 		try {
 			feed_in_analog(dynamic_pointer_cast<Analog>(packet->payload()));
-		} catch (std::bad_alloc) {
+		} catch (bad_alloc&) {
 			out_of_memory_ = true;
 			device_->stop();
 		}
 		break;
 
+	case SR_DF_FRAME_BEGIN:
+		feed_in_frame_begin();
+		break;
+
+	case SR_DF_FRAME_END:
+		feed_in_frame_end();
+		break;
+
 	case SR_DF_END:
-	{
+		// Strictly speaking, this is performed when a frame end marker was
+		// received, so there's no point doing this again. However, not all
+		// devices use frames, and for those devices, we need to do it here.
 		{
 			lock_guard<recursive_mutex> lock(data_mutex_);
+
+			if (cur_logic_segment_)
+				cur_logic_segment_->set_complete();
+
+			for (auto& entry : cur_analog_segments_) {
+				shared_ptr<data::AnalogSegment> segment = entry.second;
+				segment->set_complete();
+			}
+
 			cur_logic_segment_.reset();
 			cur_analog_segments_.clear();
 		}
-		frame_ended();
 		break;
-	}
+
 	default:
 		break;
 	}
 }
 
+void Session::on_data_saved()
+{
+	data_saved_ = true;
+}
+
+#ifdef ENABLE_DECODE
+void Session::on_new_decoders_selected(vector<const srd_decoder*> decoders)
+{
+	assert(decoders.size() > 0);
+
+	shared_ptr<data::DecodeSignal> signal = add_decode_signal();
+
+	if (signal)
+		for (unsigned int i = 0; i < decoders.size(); i++) {
+			const srd_decoder* d = decoders[i];
+			signal->stack_decoder(d, !(i < decoders.size() - 1));
+		}
+}
+#endif
+
 } // namespace pv