[pulseview.git] / pv / sigsession.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifdef ENABLE_DECODE
#include <libsigrokdecode/libsigrokdecode.h>
#endif

#include "sigsession.h"

#include "devicemanager.h"

#include "data/analog.h"
#include "data/analogsnapshot.h"
#include "data/decoderstack.h"
#include "data/logic.h"
#include "data/logicsnapshot.h"
#include "data/decode/decoder.h"

#include "view/analogsignal.h"
#include "view/decodetrace.h"
#include "view/logicsignal.h"

#include <assert.h>

#include <stdexcept>

#include <boost/foreach.hpp>

#include <sys/stat.h>

#include <QDebug>

using boost::dynamic_pointer_cast;
using boost::function;
using boost::lock_guard;
using boost::mutex;
using boost::shared_ptr;
using std::map;
using std::set;
using std::string;
using std::vector;

namespace pv {

// TODO: This should not be necessary
SigSession* SigSession::_session = NULL;

SigSession::SigSession(DeviceManager &device_manager) :
	_device_manager(device_manager),
	_sdi(NULL),
	_capture_state(Stopped)
{
	// TODO: This should not be necessary
	_session = this;
}

SigSession::~SigSession()
{
	stop_capture();

	_sampling_thread.join();

	if (_sdi)
		_device_manager.release_device(_sdi);
	_sdi = NULL;

	// TODO: This should not be necessary
	_session = NULL;
}

struct sr_dev_inst* SigSession::get_device() const
{
	return _sdi;
}

void SigSession::set_device(struct sr_dev_inst *sdi)
{
	// Ensure we are not capturing before setting the device
	stop_capture();

	if (_sdi)
		_device_manager.release_device(_sdi);
	if (sdi)
		_device_manager.use_device(sdi, this);
	_sdi = sdi;
	update_signals(sdi);
}

void SigSession::release_device(struct sr_dev_inst *sdi)
{
	(void)sdi;

	assert(_capture_state == Stopped);
	_sdi = NULL;
	update_signals(NULL);
}

void SigSession::load_file(const string &name,
	function<void (const QString)> error_handler)
{
	stop_capture();

	if (sr_session_load(name.c_str()) == SR_OK) {
		GSList *devlist = NULL;
		sr_session_dev_list(&devlist);

		if (!devlist || !devlist->data ||
			sr_session_start() != SR_OK) {
			error_handler(tr("Failed to start session."));
			return;
		}

		sr_dev_inst *const sdi = (sr_dev_inst*)devlist->data;
		g_slist_free(devlist);

		_decode_traces.clear();
		update_signals(sdi);
		read_sample_rate(sdi);

		_sampling_thread = boost::thread(
			&SigSession::load_session_thread_proc, this,
			error_handler);

	} else {
		sr_input *in = NULL;

		if (!(in = load_input_file_format(name.c_str(),
			error_handler)))
			return;

		_decode_traces.clear();
		update_signals(in->sdi);
		read_sample_rate(in->sdi);

		_sampling_thread = boost::thread(
			&SigSession::load_input_thread_proc, this,
			name, in, error_handler);
	}
}

SigSession::capture_state SigSession::get_capture_state() const
{
	lock_guard<mutex> lock(_sampling_mutex);
	return _capture_state;
}

void SigSession::start_capture(function<void (const QString)> error_handler)
{
	stop_capture();

	// Check that a device instance has been selected.
	if (!_sdi) {
		qDebug() << "No device selected";
		return;
	}

	// Check that at least one probe is enabled
	const GSList *l;
	for (l = _sdi->probes; l; l = l->next) {
		sr_probe *const probe = (sr_probe*)l->data;
		assert(probe);
		if (probe->enabled)
			break;
	}

	if (!l) {
		error_handler(tr("No probes enabled."));
		return;
	}

	// Begin the session
	_sampling_thread = boost::thread(
		&SigSession::sample_thread_proc, this, _sdi, error_handler);
}

void SigSession::stop_capture()
{
	if (get_capture_state() == Stopped)
		return;

	sr_session_stop();

	// Check that sampling stopped
	_sampling_thread.join();
}

set< shared_ptr<data::SignalData> > SigSession::get_data() const
{
	lock_guard<mutex> lock(_signals_mutex);
	set< shared_ptr<data::SignalData> > data;
	BOOST_FOREACH(const shared_ptr<view::Signal> sig, _signals) {
		assert(sig);
		data.insert(sig->data());
	}

	return data;
}

vector< shared_ptr<view::Signal> > SigSession::get_signals() const
{
	lock_guard<mutex> lock(_signals_mutex);
	return _signals;
}

#ifdef ENABLE_DECODE
bool SigSession::add_decoder(srd_decoder *const dec)
{
	map<const srd_probe*, shared_ptr<view::LogicSignal> > probes;
	shared_ptr<data::DecoderStack> decoder_stack;

	try
	{
		lock_guard<mutex> lock(_signals_mutex);

		// Create the decoder
		decoder_stack = shared_ptr<data::DecoderStack>(
			new data::DecoderStack(dec));

		// Auto select the initial probes
		for(const GSList *i = dec->probes; i; i = i->next)
		{
			const srd_probe *const probe = (const srd_probe*)i->data;
			BOOST_FOREACH(shared_ptr<view::Signal> s, _signals)
			{
				shared_ptr<view::LogicSignal> l =
					dynamic_pointer_cast<view::LogicSignal>(s);
				if (l && QString::fromUtf8(probe->name).
					toLower().contains(
					l->get_name().toLower()))
					probes[probe] = l;
			}
		}

		assert(decoder_stack);
		assert(!decoder_stack->stack().empty());
		assert(decoder_stack->stack().front());
		decoder_stack->stack().front()->set_probes(probes);

		// Create the decode signal
		shared_ptr<view::DecodeTrace> d(
			new view::DecodeTrace(*this, decoder_stack,
				_decode_traces.size()));
		_decode_traces.push_back(d);
	}
	catch(std::runtime_error e)
	{
		return false;
	}

	signals_changed();

	// Do an initial decode
	decoder_stack->begin_decode();

	return true;
}

vector< shared_ptr<view::DecodeTrace> > SigSession::get_decode_signals() const
{
	lock_guard<mutex> lock(_signals_mutex);
	return _decode_traces;
}

void SigSession::remove_decode_signal(view::DecodeTrace *signal)
{
	for (vector< shared_ptr<view::DecodeTrace> >::iterator i =
		_decode_traces.begin();
		i != _decode_traces.end();
		i++)
		if ((*i).get() == signal)
		{
			_decode_traces.erase(i);
			signals_changed();
			return;
		}
}
#endif

void SigSession::set_capture_state(capture_state state)
{
	lock_guard<mutex> lock(_sampling_mutex);
	const bool changed = _capture_state != state;
	_capture_state = state;
	if(changed)
		capture_state_changed(state);
}

/**
 * Attempts to autodetect the format. Failing that
 * @param filename The filename of the input file.
 * @return A pointer to the 'struct sr_input_format' that should be used,
 *         or NULL if no input format was selected or auto-detected.
 */
sr_input_format* SigSession::determine_input_file_format(
	const string &filename)
{
	int i;

	/* If there are no input formats, return NULL right away. */
	sr_input_format *const *const inputs = sr_input_list();
	if (!inputs) {
		g_critical("No supported input formats available.");
		return NULL;
	}

	/* Otherwise, try to find an input module that can handle this file. */
	for (i = 0; inputs[i]; i++) {
		if (inputs[i]->format_match(filename.c_str()))
			break;
	}

	/* Return NULL if no input module wanted to touch this. */
	if (!inputs[i]) {
		g_critical("Error: no matching input module found.");
		return NULL;
	}

	return inputs[i];
}

sr_input* SigSession::load_input_file_format(const string &filename,
	function<void (const QString)> error_handler,
	sr_input_format *format)
{
	struct stat st;
	sr_input *in;

	if (!format && !(format =
		determine_input_file_format(filename.c_str()))) {
		/* The exact cause was already logged. */
		return NULL;
	}

	if (stat(filename.c_str(), &st) == -1) {
		error_handler(tr("Failed to load file"));
		return NULL;
	}

	/* Initialize the input module. */
	if (!(in = new sr_input)) {
		qDebug("Failed to allocate input module.\n");
		return NULL;
	}

	in->format = format;
	in->param = NULL;
	if (in->format->init &&
		in->format->init(in, filename.c_str()) != SR_OK) {
		qDebug("Input format init failed.\n");
		return NULL;
	}

	sr_session_new();

	if (sr_session_dev_add(in->sdi) != SR_OK) {
		qDebug("Failed to use device.\n");
		sr_session_destroy();
		return NULL;
	}

	return in;
}

void SigSession::update_signals(const sr_dev_inst *const sdi)
{
	assert(_capture_state == Stopped);

	unsigned int logic_probe_count = 0;

	// Clear the decode traces
	_decode_traces.clear();

	// Detect what data types we will receive
	if(sdi) {
		for (const GSList *l = sdi->probes; l; l = l->next) {
			const sr_probe *const probe = (const sr_probe *)l->data;
			if (!probe->enabled)
				continue;

			switch(probe->type) {
			case SR_PROBE_LOGIC:
				logic_probe_count++;
				break;
			}
		}
	}

	// Create data containers for the logic data snapshots
	{
		lock_guard<mutex> data_lock(_data_mutex);

		_logic_data.reset();
		if (logic_probe_count != 0) {
			_logic_data.reset(new data::Logic(
				logic_probe_count));
			assert(_logic_data);
		}
	}

	// Make the Signals list
	do {
		lock_guard<mutex> lock(_signals_mutex);

		_signals.clear();

		if(!sdi)
			break;

		for (const GSList *l = sdi->probes; l; l = l->next) {
			shared_ptr<view::Signal> signal;
			sr_probe *const probe =	(sr_probe *)l->data;
			assert(probe);

			switch(probe->type) {
			case SR_PROBE_LOGIC:
				signal = shared_ptr<view::Signal>(
					new view::LogicSignal(*this, probe,
						_logic_data));
				break;

			case SR_PROBE_ANALOG:
			{
				shared_ptr<data::Analog> data(
					new data::Analog());
				signal = shared_ptr<view::Signal>(
					new view::AnalogSignal(*this, probe,
						data));
				break;
			}

			default:
				assert(0);
				break;
			}

			assert(signal);
			_signals.push_back(signal);
		}

	} while(0);

	signals_changed();
}

bool SigSession::is_trigger_enabled() const
{
	assert(_sdi);
	for (const GSList *l = _sdi->probes; l; l = l->next) {
		const sr_probe *const p = (const sr_probe *)l->data;
		assert(p);
		if (p->trigger && p->trigger[0] != '\0')
			return true;
	}

	return false;
}

shared_ptr<view::Signal> SigSession::signal_from_probe(
	const sr_probe *probe) const
{
	lock_guard<mutex> lock(_signals_mutex);
	BOOST_FOREACH(shared_ptr<view::Signal> sig, _signals) {
		assert(sig);
		if (sig->probe() == probe)
			return sig;
	}
	return shared_ptr<view::Signal>();
}

void SigSession::read_sample_rate(const sr_dev_inst *const sdi)
{
	GVariant *gvar;
	uint64_t sample_rate = 0;

	// Read out the sample rate
	if(sdi->driver)
	{
		const int ret = sr_config_get(sdi->driver, sdi, NULL,
			SR_CONF_SAMPLERATE, &gvar);
		if (ret != SR_OK) {
			qDebug("Failed to get samplerate\n");
			return;
		}

		sample_rate = g_variant_get_uint64(gvar);
		g_variant_unref(gvar);
	}

	// Set the sample rate of all data
	const set< shared_ptr<data::SignalData> > data_set = get_data();
	BOOST_FOREACH(shared_ptr<data::SignalData> data, data_set) {
		assert(data);
		data->set_samplerate(sample_rate);
	}
}

void SigSession::load_session_thread_proc(
	function<void (const QString)> error_handler)
{
	(void)error_handler;

	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);

	set_capture_state(Running);

	sr_session_run();

	sr_session_destroy();
	set_capture_state(Stopped);

	// Confirm that SR_DF_END was received
	assert(!_cur_logic_snapshot);
	assert(_cur_analog_snapshots.empty());
}

void SigSession::load_input_thread_proc(const string name,
	sr_input *in, function<void (const QString)> error_handler)
{
	(void)error_handler;

	assert(in);
	assert(in->format);

	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);

	set_capture_state(Running);

	in->format->loadfile(in, name.c_str());

	sr_session_destroy();
	set_capture_state(Stopped);

	// Confirm that SR_DF_END was received
	assert(!_cur_logic_snapshot);
	assert(_cur_analog_snapshots.empty());

	delete in;
}

void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
	function<void (const QString)> error_handler)
{
	assert(sdi);
	assert(error_handler);

	sr_session_new();
	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);

	if (sr_session_dev_add(sdi) != SR_OK) {
		error_handler(tr("Failed to use device."));
		sr_session_destroy();
		return;
	}

	if (sr_session_start() != SR_OK) {
		error_handler(tr("Failed to start session."));
		return;
	}

	set_capture_state(is_trigger_enabled() ? AwaitingTrigger : Running);

	sr_session_run();
	sr_session_destroy();

	set_capture_state(Stopped);

	// Confirm that SR_DF_END was received
	if (_cur_logic_snapshot)
	{
		qDebug("SR_DF_END was not received.");
		assert(0);
	}
}

void SigSession::feed_in_header(const sr_dev_inst *sdi)
{
	read_sample_rate(sdi);
}

void SigSession::feed_in_meta(const sr_dev_inst *sdi,
	const sr_datafeed_meta &meta)
{
	(void)sdi;

	for (const GSList *l = meta.config; l; l = l->next) {
		const sr_config *const src = (const sr_config*)l->data;
		switch (src->key) {
		case SR_CONF_SAMPLERATE:
			/// @todo handle samplerate changes
			/// samplerate = (uint64_t *)src->value;
			break;
		default:
			// Unknown metadata is not an error.
			break;
		}
	}

	signals_changed();
}

void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
{
	lock_guard<mutex> lock(_data_mutex);

	if (!_logic_data)
	{
		qDebug() << "Unexpected logic packet";
		return;
	}

	if (!_cur_logic_snapshot)
	{
		// This could be the first packet after a trigger
		set_capture_state(Running);

		// Create a new data snapshot
		_cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
			new data::LogicSnapshot(logic));
		_logic_data->push_snapshot(_cur_logic_snapshot);
	}
	else
	{
		// Append to the existing data snapshot
		_cur_logic_snapshot->append_payload(logic);
	}

	data_updated();
}

void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
{
	lock_guard<mutex> lock(_data_mutex);

	const unsigned int probe_count = g_slist_length(analog.probes);
	const size_t sample_count = analog.num_samples / probe_count;
	const float *data = analog.data;
	bool sweep_beginning = false;

	for (GSList *p = analog.probes; p; p = p->next)
	{
		shared_ptr<data::AnalogSnapshot> snapshot;

		sr_probe *const probe = (sr_probe*)p->data;
		assert(probe);

		// Try to get the snapshot of the probe
		const map< const sr_probe*, shared_ptr<data::AnalogSnapshot> >::
			iterator iter = _cur_analog_snapshots.find(probe);
		if (iter != _cur_analog_snapshots.end())
			snapshot = (*iter).second;
		else
		{
			// If no snapshot was found, this means we havn't
			// created one yet. i.e. this is the first packet
			// in the sweep containing this snapshot.
			sweep_beginning = true;

			// Create a snapshot, keep it in the maps of probes
			snapshot = shared_ptr<data::AnalogSnapshot>(
				new data::AnalogSnapshot());
			_cur_analog_snapshots[probe] = snapshot;

			// Find the annalog data associated with the probe
			shared_ptr<view::AnalogSignal> sig =
				dynamic_pointer_cast<view::AnalogSignal>(
					signal_from_probe(probe));
			assert(sig);

			shared_ptr<data::Analog> data(sig->analog_data());
			assert(data);

			// Push the snapshot into the analog data.
			data->push_snapshot(snapshot);
		}

		assert(snapshot);

		// Append the samples in the snapshot
		snapshot->append_interleaved_samples(data++, sample_count,
			probe_count);
	}

	if (sweep_beginning) {
		// This could be the first packet after a trigger
		set_capture_state(Running);
	}

	data_updated();
}

void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
	const struct sr_datafeed_packet *packet)
{
	assert(sdi);
	assert(packet);

	switch (packet->type) {
	case SR_DF_HEADER:
		feed_in_header(sdi);
		break;

	case SR_DF_META:
		assert(packet->payload);
		feed_in_meta(sdi,
			*(const sr_datafeed_meta*)packet->payload);
		break;

	case SR_DF_LOGIC:
		assert(packet->payload);
		feed_in_logic(*(const sr_datafeed_logic*)packet->payload);
		break;

	case SR_DF_ANALOG:
		assert(packet->payload);
		feed_in_analog(*(const sr_datafeed_analog*)packet->payload);
		break;

	case SR_DF_END:
	{
		{
			lock_guard<mutex> lock(_data_mutex);
			_cur_logic_snapshot.reset();
			_cur_analog_snapshots.clear();
		}
		data_updated();
		break;
	}
	}
}

void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
	const struct sr_datafeed_packet *packet, void *cb_data)
{
	(void) cb_data;
	assert(_session);
	_session->data_feed_in(sdi, packet);
}

} // namespace pv
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#ifdef ENABLE_DECODE
	22	#include <libsigrokdecode/libsigrokdecode.h>
	23	#endif
	24
	25	#include "sigsession.h"
	26
	27	#include "devicemanager.h"
	28
	29	#include "data/analog.h"
	30	#include "data/analogsnapshot.h"
	31	#include "data/decoderstack.h"
	32	#include "data/logic.h"
	33	#include "data/logicsnapshot.h"
	34	#include "data/decode/decoder.h"
	35
	36	#include "view/analogsignal.h"
	37	#include "view/decodetrace.h"
	38	#include "view/logicsignal.h"
	39
	40	#include <assert.h>
	41
	42	#include <stdexcept>
	43
	44	#include <boost/foreach.hpp>
	45
	46	#include <sys/stat.h>
	47
	48	#include <QDebug>
	49
	50	using boost::dynamic_pointer_cast;
	51	using boost::function;
	52	using boost::lock_guard;
	53	using boost::mutex;
	54	using boost::shared_ptr;
	55	using std::map;
	56	using std::set;
	57	using std::string;
	58	using std::vector;
	59
	60	namespace pv {
	61
	62	// TODO: This should not be necessary
	63	SigSession* SigSession::_session = NULL;
	64
	65	SigSession::SigSession(DeviceManager &device_manager) :
	66	_device_manager(device_manager),
	67	_sdi(NULL),
	68	_capture_state(Stopped)
	69	{
	70	// TODO: This should not be necessary
	71	_session = this;
	72	}
	73
	74	SigSession::~SigSession()
	75	{
	76	stop_capture();
	77
	78	_sampling_thread.join();
	79
	80	if (_sdi)
	81	_device_manager.release_device(_sdi);
	82	_sdi = NULL;
	83
	84	// TODO: This should not be necessary
	85	_session = NULL;
	86	}
	87
	88	struct sr_dev_inst* SigSession::get_device() const
	89	{
	90	return _sdi;
	91	}
	92
	93	void SigSession::set_device(struct sr_dev_inst *sdi)
	94	{
	95	// Ensure we are not capturing before setting the device
	96	stop_capture();
	97
	98	if (_sdi)
	99	_device_manager.release_device(_sdi);
	100	if (sdi)
	101	_device_manager.use_device(sdi, this);
	102	_sdi = sdi;
	103	update_signals(sdi);
	104	}
	105
	106	void SigSession::release_device(struct sr_dev_inst *sdi)
	107	{
	108	(void)sdi;
	109
	110	assert(_capture_state == Stopped);
	111	_sdi = NULL;
	112	update_signals(NULL);
	113	}
	114
	115	void SigSession::load_file(const string &name,
	116	function<void (const QString)> error_handler)
	117	{
	118	stop_capture();
	119
	120	if (sr_session_load(name.c_str()) == SR_OK) {
	121	GSList *devlist = NULL;
	122	sr_session_dev_list(&devlist);
	123
	124	if (!devlist \|\| !devlist->data \|\|
	125	sr_session_start() != SR_OK) {
	126	error_handler(tr("Failed to start session."));
	127	return;
	128	}
	129
	130	sr_dev_inst const sdi = (sr_dev_inst)devlist->data;
	131	g_slist_free(devlist);
	132
	133	_decode_traces.clear();
	134	update_signals(sdi);
	135	read_sample_rate(sdi);
	136
	137	_sampling_thread = boost::thread(
	138	&SigSession::load_session_thread_proc, this,
	139	error_handler);
	140
	141	} else {
	142	sr_input *in = NULL;
	143
	144	if (!(in = load_input_file_format(name.c_str(),
	145	error_handler)))
	146	return;
	147
	148	_decode_traces.clear();
	149	update_signals(in->sdi);
	150	read_sample_rate(in->sdi);
	151
	152	_sampling_thread = boost::thread(
	153	&SigSession::load_input_thread_proc, this,
	154	name, in, error_handler);
	155	}
	156	}
	157
	158	SigSession::capture_state SigSession::get_capture_state() const
	159	{
	160	lock_guard<mutex> lock(_sampling_mutex);
	161	return _capture_state;
	162	}
	163
	164	void SigSession::start_capture(function<void (const QString)> error_handler)
	165	{
	166	stop_capture();
	167
	168	// Check that a device instance has been selected.
	169	if (!_sdi) {
	170	qDebug() << "No device selected";
	171	return;
	172	}
	173
	174	// Check that at least one probe is enabled
	175	const GSList *l;
	176	for (l = _sdi->probes; l; l = l->next) {
	177	sr_probe const probe = (sr_probe)l->data;
	178	assert(probe);
	179	if (probe->enabled)
	180	break;
	181	}
	182
	183	if (!l) {
	184	error_handler(tr("No probes enabled."));
	185	return;
	186	}
	187
	188	// Begin the session
	189	_sampling_thread = boost::thread(
	190	&SigSession::sample_thread_proc, this, _sdi, error_handler);
	191	}
	192
	193	void SigSession::stop_capture()
	194	{
	195	if (get_capture_state() == Stopped)
	196	return;
	197
	198	sr_session_stop();
	199
	200	// Check that sampling stopped
	201	_sampling_thread.join();
	202	}
	203
	204	set< shared_ptr<data::SignalData> > SigSession::get_data() const
	205	{
	206	lock_guard<mutex> lock(_signals_mutex);
	207	set< shared_ptr<data::SignalData> > data;
	208	BOOST_FOREACH(const shared_ptr<view::Signal> sig, _signals) {
	209	assert(sig);
	210	data.insert(sig->data());
	211	}
	212
	213	return data;
	214	}
	215
	216	vector< shared_ptr<view::Signal> > SigSession::get_signals() const
	217	{
	218	lock_guard<mutex> lock(_signals_mutex);
	219	return _signals;
	220	}
	221
	222	#ifdef ENABLE_DECODE
	223	bool SigSession::add_decoder(srd_decoder *const dec)
	224	{
	225	map<const srd_probe*, shared_ptr<view::LogicSignal> > probes;
	226	shared_ptr<data::DecoderStack> decoder_stack;
	227
	228	try
	229	{
	230	lock_guard<mutex> lock(_signals_mutex);
	231
	232	// Create the decoder
	233	decoder_stack = shared_ptr<data::DecoderStack>(
	234	new data::DecoderStack(dec));
	235
	236	// Auto select the initial probes
	237	for(const GSList *i = dec->probes; i; i = i->next)
	238	{
	239	const srd_probe const probe = (const srd_probe)i->data;
	240	BOOST_FOREACH(shared_ptr<view::Signal> s, _signals)
	241	{
	242	shared_ptr<view::LogicSignal> l =
	243	dynamic_pointer_cast<view::LogicSignal>(s);
	244	if (l && QString::fromUtf8(probe->name).
	245	toLower().contains(
	246	l->get_name().toLower()))
	247	probes[probe] = l;
	248	}
	249	}
	250
	251	assert(decoder_stack);
	252	assert(!decoder_stack->stack().empty());
	253	assert(decoder_stack->stack().front());
	254	decoder_stack->stack().front()->set_probes(probes);
	255
	256	// Create the decode signal
	257	shared_ptr<view::DecodeTrace> d(
	258	new view::DecodeTrace(*this, decoder_stack,
	259	_decode_traces.size()));
	260	_decode_traces.push_back(d);
	261	}
	262	catch(std::runtime_error e)
	263	{
	264	return false;
	265	}
	266
	267	signals_changed();
	268
	269	// Do an initial decode
	270	decoder_stack->begin_decode();
	271
	272	return true;
	273	}
	274
	275	vector< shared_ptr<view::DecodeTrace> > SigSession::get_decode_signals() const
	276	{
	277	lock_guard<mutex> lock(_signals_mutex);
	278	return _decode_traces;
	279	}
	280
	281	void SigSession::remove_decode_signal(view::DecodeTrace *signal)
	282	{
	283	for (vector< shared_ptr<view::DecodeTrace> >::iterator i =
	284	_decode_traces.begin();
	285	i != _decode_traces.end();
	286	i++)
	287	if ((*i).get() == signal)
	288	{
	289	_decode_traces.erase(i);
	290	signals_changed();
	291	return;
	292	}
	293	}
	294	#endif
	295
	296	void SigSession::set_capture_state(capture_state state)
	297	{
	298	lock_guard<mutex> lock(_sampling_mutex);
	299	const bool changed = _capture_state != state;
	300	_capture_state = state;
	301	if(changed)
	302	capture_state_changed(state);
	303	}
	304
	305	/**
	306	* Attempts to autodetect the format. Failing that
	307	* @param filename The filename of the input file.
	308	* @return A pointer to the 'struct sr_input_format' that should be used,
	309	* or NULL if no input format was selected or auto-detected.
	310	*/
	311	sr_input_format* SigSession::determine_input_file_format(
	312	const string &filename)
	313	{
	314	int i;
	315
	316	/* If there are no input formats, return NULL right away. */
	317	sr_input_format const const inputs = sr_input_list();
	318	if (!inputs) {
	319	g_critical("No supported input formats available.");
	320	return NULL;
	321	}
	322
	323	/* Otherwise, try to find an input module that can handle this file. */
	324	for (i = 0; inputs[i]; i++) {
	325	if (inputs[i]->format_match(filename.c_str()))
	326	break;
	327	}
	328
	329	/* Return NULL if no input module wanted to touch this. */
	330	if (!inputs[i]) {
	331	g_critical("Error: no matching input module found.");
	332	return NULL;
	333	}
	334
	335	return inputs[i];
	336	}
	337
	338	sr_input* SigSession::load_input_file_format(const string &filename,
	339	function<void (const QString)> error_handler,
	340	sr_input_format *format)
	341	{
	342	struct stat st;
	343	sr_input *in;
	344
	345	if (!format && !(format =
	346	determine_input_file_format(filename.c_str()))) {
	347	/* The exact cause was already logged. */
	348	return NULL;
	349	}
	350
	351	if (stat(filename.c_str(), &st) == -1) {
	352	error_handler(tr("Failed to load file"));
	353	return NULL;
	354	}
	355
	356	/* Initialize the input module. */
	357	if (!(in = new sr_input)) {
	358	qDebug("Failed to allocate input module.\n");
	359	return NULL;
	360	}
	361
	362	in->format = format;
	363	in->param = NULL;
	364	if (in->format->init &&
	365	in->format->init(in, filename.c_str()) != SR_OK) {
	366	qDebug("Input format init failed.\n");
	367	return NULL;
	368	}
	369
	370	sr_session_new();
	371
	372	if (sr_session_dev_add(in->sdi) != SR_OK) {
	373	qDebug("Failed to use device.\n");
	374	sr_session_destroy();
	375	return NULL;
	376	}
	377
	378	return in;
	379	}
	380
	381	void SigSession::update_signals(const sr_dev_inst *const sdi)
	382	{
	383	assert(_capture_state == Stopped);
	384
	385	unsigned int logic_probe_count = 0;
	386
	387	// Clear the decode traces
	388	_decode_traces.clear();
	389
	390	// Detect what data types we will receive
	391	if(sdi) {
	392	for (const GSList *l = sdi->probes; l; l = l->next) {
	393	const sr_probe const probe = (const sr_probe )l->data;
	394	if (!probe->enabled)
	395	continue;
	396
	397	switch(probe->type) {
	398	case SR_PROBE_LOGIC:
	399	logic_probe_count++;
	400	break;
	401	}
	402	}
	403	}
	404
	405	// Create data containers for the logic data snapshots
	406	{
	407	lock_guard<mutex> data_lock(_data_mutex);
	408
	409	_logic_data.reset();
	410	if (logic_probe_count != 0) {
	411	_logic_data.reset(new data::Logic(
	412	logic_probe_count));
	413	assert(_logic_data);
	414	}
	415	}
	416
	417	// Make the Signals list
	418	do {
	419	lock_guard<mutex> lock(_signals_mutex);
	420
	421	_signals.clear();
	422
	423	if(!sdi)
	424	break;
	425
	426	for (const GSList *l = sdi->probes; l; l = l->next) {
	427	shared_ptr<view::Signal> signal;
	428	sr_probe const probe = (sr_probe )l->data;
	429	assert(probe);
	430
	431	switch(probe->type) {
	432	case SR_PROBE_LOGIC:
	433	signal = shared_ptr<view::Signal>(
	434	new view::LogicSignal(*this, probe,
	435	_logic_data));
	436	break;
	437
	438	case SR_PROBE_ANALOG:
	439	{
	440	shared_ptr<data::Analog> data(
	441	new data::Analog());
	442	signal = shared_ptr<view::Signal>(
	443	new view::AnalogSignal(*this, probe,
	444	data));
	445	break;
	446	}
	447
	448	default:
	449	assert(0);
	450	break;
	451	}
	452
	453	assert(signal);
	454	_signals.push_back(signal);
	455	}
	456
	457	} while(0);
	458
	459	signals_changed();
	460	}
	461
	462	bool SigSession::is_trigger_enabled() const
	463	{
	464	assert(_sdi);
	465	for (const GSList *l = _sdi->probes; l; l = l->next) {
	466	const sr_probe const p = (const sr_probe )l->data;
	467	assert(p);
	468	if (p->trigger && p->trigger[0] != '\0')
	469	return true;
	470	}
	471
	472	return false;
	473	}
	474
	475	shared_ptr<view::Signal> SigSession::signal_from_probe(
	476	const sr_probe *probe) const
	477	{
	478	lock_guard<mutex> lock(_signals_mutex);
	479	BOOST_FOREACH(shared_ptr<view::Signal> sig, _signals) {
	480	assert(sig);
	481	if (sig->probe() == probe)
	482	return sig;
	483	}
	484	return shared_ptr<view::Signal>();
	485	}
	486
	487	void SigSession::read_sample_rate(const sr_dev_inst *const sdi)
	488	{
	489	GVariant *gvar;
	490	uint64_t sample_rate = 0;
	491
	492	// Read out the sample rate
	493	if(sdi->driver)
	494	{
	495	const int ret = sr_config_get(sdi->driver, sdi, NULL,
	496	SR_CONF_SAMPLERATE, &gvar);
	497	if (ret != SR_OK) {
	498	qDebug("Failed to get samplerate\n");
	499	return;
	500	}
	501
	502	sample_rate = g_variant_get_uint64(gvar);
	503	g_variant_unref(gvar);
	504	}
	505
	506	// Set the sample rate of all data
	507	const set< shared_ptr<data::SignalData> > data_set = get_data();
	508	BOOST_FOREACH(shared_ptr<data::SignalData> data, data_set) {
	509	assert(data);
	510	data->set_samplerate(sample_rate);
	511	}
	512	}
	513
	514	void SigSession::load_session_thread_proc(
	515	function<void (const QString)> error_handler)
	516	{
	517	(void)error_handler;
	518
	519	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
	520
	521	set_capture_state(Running);
	522
	523	sr_session_run();
	524
	525	sr_session_destroy();
	526	set_capture_state(Stopped);
	527
	528	// Confirm that SR_DF_END was received
	529	assert(!_cur_logic_snapshot);
	530	assert(_cur_analog_snapshots.empty());
	531	}
	532
	533	void SigSession::load_input_thread_proc(const string name,
	534	sr_input *in, function<void (const QString)> error_handler)
	535	{
	536	(void)error_handler;
	537
	538	assert(in);
	539	assert(in->format);
	540
	541	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
	542
	543	set_capture_state(Running);
	544
	545	in->format->loadfile(in, name.c_str());
	546
	547	sr_session_destroy();
	548	set_capture_state(Stopped);
	549
	550	// Confirm that SR_DF_END was received
	551	assert(!_cur_logic_snapshot);
	552	assert(_cur_analog_snapshots.empty());
	553
	554	delete in;
	555	}
	556
	557	void SigSession::sample_thread_proc(struct sr_dev_inst *sdi,
	558	function<void (const QString)> error_handler)
	559	{
	560	assert(sdi);
	561	assert(error_handler);
	562
	563	sr_session_new();
	564	sr_session_datafeed_callback_add(data_feed_in_proc, NULL);
	565
	566	if (sr_session_dev_add(sdi) != SR_OK) {
	567	error_handler(tr("Failed to use device."));
	568	sr_session_destroy();
	569	return;
	570	}
	571
	572	if (sr_session_start() != SR_OK) {
	573	error_handler(tr("Failed to start session."));
	574	return;
	575	}
	576
	577	set_capture_state(is_trigger_enabled() ? AwaitingTrigger : Running);
	578
	579	sr_session_run();
	580	sr_session_destroy();
	581
	582	set_capture_state(Stopped);
	583
	584	// Confirm that SR_DF_END was received
	585	if (_cur_logic_snapshot)
	586	{
	587	qDebug("SR_DF_END was not received.");
	588	assert(0);
	589	}
	590	}
	591
	592	void SigSession::feed_in_header(const sr_dev_inst *sdi)
	593	{
	594	read_sample_rate(sdi);
	595	}
	596
	597	void SigSession::feed_in_meta(const sr_dev_inst *sdi,
	598	const sr_datafeed_meta &meta)
	599	{
	600	(void)sdi;
	601
	602	for (const GSList *l = meta.config; l; l = l->next) {
	603	const sr_config const src = (const sr_config)l->data;
	604	switch (src->key) {
	605	case SR_CONF_SAMPLERATE:
	606	/// @todo handle samplerate changes
	607	/// samplerate = (uint64_t *)src->value;
	608	break;
	609	default:
	610	// Unknown metadata is not an error.
	611	break;
	612	}
	613	}
	614
	615	signals_changed();
	616	}
	617
	618	void SigSession::feed_in_logic(const sr_datafeed_logic &logic)
	619	{
	620	lock_guard<mutex> lock(_data_mutex);
	621
	622	if (!_logic_data)
	623	{
	624	qDebug() << "Unexpected logic packet";
	625	return;
	626	}
	627
	628	if (!_cur_logic_snapshot)
	629	{
	630	// This could be the first packet after a trigger
	631	set_capture_state(Running);
	632
	633	// Create a new data snapshot
	634	_cur_logic_snapshot = shared_ptr<data::LogicSnapshot>(
	635	new data::LogicSnapshot(logic));
	636	_logic_data->push_snapshot(_cur_logic_snapshot);
	637	}
	638	else
	639	{
	640	// Append to the existing data snapshot
	641	_cur_logic_snapshot->append_payload(logic);
	642	}
	643
	644	data_updated();
	645	}
	646
	647	void SigSession::feed_in_analog(const sr_datafeed_analog &analog)
	648	{
	649	lock_guard<mutex> lock(_data_mutex);
	650
	651	const unsigned int probe_count = g_slist_length(analog.probes);
	652	const size_t sample_count = analog.num_samples / probe_count;
	653	const float *data = analog.data;
	654	bool sweep_beginning = false;
	655
	656	for (GSList *p = analog.probes; p; p = p->next)
	657	{
	658	shared_ptr<data::AnalogSnapshot> snapshot;
	659
	660	sr_probe const probe = (sr_probe)p->data;
	661	assert(probe);
	662
	663	// Try to get the snapshot of the probe
	664	const map< const sr_probe*, shared_ptr<data::AnalogSnapshot> >::
	665	iterator iter = _cur_analog_snapshots.find(probe);
	666	if (iter != _cur_analog_snapshots.end())
	667	snapshot = (*iter).second;
	668	else
	669	{
	670	// If no snapshot was found, this means we havn't
	671	// created one yet. i.e. this is the first packet
	672	// in the sweep containing this snapshot.
	673	sweep_beginning = true;
	674
	675	// Create a snapshot, keep it in the maps of probes
	676	snapshot = shared_ptr<data::AnalogSnapshot>(
	677	new data::AnalogSnapshot());
	678	_cur_analog_snapshots[probe] = snapshot;
	679
	680	// Find the annalog data associated with the probe
	681	shared_ptr<view::AnalogSignal> sig =
	682	dynamic_pointer_cast<view::AnalogSignal>(
	683	signal_from_probe(probe));
	684	assert(sig);
	685
	686	shared_ptr<data::Analog> data(sig->analog_data());
	687	assert(data);
	688
	689	// Push the snapshot into the analog data.
	690	data->push_snapshot(snapshot);
	691	}
	692
	693	assert(snapshot);
	694
	695	// Append the samples in the snapshot
	696	snapshot->append_interleaved_samples(data++, sample_count,
	697	probe_count);
	698	}
	699
	700	if (sweep_beginning) {
	701	// This could be the first packet after a trigger
	702	set_capture_state(Running);
	703	}
	704
	705	data_updated();
	706	}
	707
	708	void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
	709	const struct sr_datafeed_packet *packet)
	710	{
	711	assert(sdi);
	712	assert(packet);
	713
	714	switch (packet->type) {
	715	case SR_DF_HEADER:
	716	feed_in_header(sdi);
	717	break;
	718
	719	case SR_DF_META:
	720	assert(packet->payload);
	721	feed_in_meta(sdi,
	722	(const sr_datafeed_meta)packet->payload);
	723	break;
	724
	725	case SR_DF_LOGIC:
	726	assert(packet->payload);
	727	feed_in_logic((const sr_datafeed_logic)packet->payload);
	728	break;
	729
	730	case SR_DF_ANALOG:
	731	assert(packet->payload);
	732	feed_in_analog((const sr_datafeed_analog)packet->payload);
	733	break;
	734
	735	case SR_DF_END:
	736	{
	737	{
	738	lock_guard<mutex> lock(_data_mutex);
	739	_cur_logic_snapshot.reset();
	740	_cur_analog_snapshots.clear();
	741	}
	742	data_updated();
	743	break;
	744	}
	745	}
	746	}
	747
	748	void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi,
	749	const struct sr_datafeed_packet packet, void cb_data)
	750	{
	751	(void) cb_data;
	752	assert(_session);
	753	_session->data_feed_in(sdi, packet);
	754	}
	755
	756	} // namespace pv