[pulseview.git] / pv / data / decoderstack.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012 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
 */

#include <libsigrokdecode/libsigrokdecode.h>

#include <boost/foreach.hpp>
#include <boost/thread/thread.hpp>

#include <stdexcept>

#include <QDebug>

#include "decoderstack.h"

#include <pv/data/logic.h>
#include <pv/data/logicsnapshot.h>
#include <pv/data/decode/decoder.h>
#include <pv/data/decode/annotation.h>
#include <pv/sigsession.h>
#include <pv/view/logicsignal.h>

using boost::lock_guard;
using boost::mutex;
using boost::optional;
using boost::shared_ptr;
using boost::unique_lock;
using std::deque;
using std::make_pair;
using std::max;
using std::min;
using std::list;
using std::map;
using std::pair;
using std::vector;

using namespace pv::data::decode;

namespace pv {
namespace data {

const double DecoderStack::DecodeMargin = 1.0;
const double DecoderStack::DecodeThreshold = 0.2;
const int64_t DecoderStack::DecodeChunkLength = 4096;
const unsigned int DecoderStack::DecodeNotifyPeriod = 65536;

mutex DecoderStack::_global_decode_mutex;

DecoderStack::DecoderStack(pv::SigSession &session,
	const srd_decoder *const dec) :
	_session(session),
	_sample_count(0),
	_frame_complete(false),
	_samples_decoded(0)
{
	connect(&_session, SIGNAL(frame_began()),
		this, SLOT(on_new_frame()));
	connect(&_session, SIGNAL(data_received()),
		this, SLOT(on_data_received()));
	connect(&_session, SIGNAL(frame_ended()),
		this, SLOT(on_frame_ended()));

	_stack.push_back(shared_ptr<decode::Decoder>(
		new decode::Decoder(dec)));
}

DecoderStack::~DecoderStack()
{
	if (_decode_thread.joinable()) {
		_decode_thread.interrupt();
		_decode_thread.join();
	}
}

const std::list< boost::shared_ptr<decode::Decoder> >&
DecoderStack::stack() const
{
	return _stack;
}

void DecoderStack::push(boost::shared_ptr<decode::Decoder> decoder)
{
	assert(decoder);
	_stack.push_back(decoder);
}

void DecoderStack::remove(int index)
{
	assert(index >= 0);
	assert(index < (int)_stack.size());

	// Find the decoder in the stack
	list< shared_ptr<Decoder> >::iterator iter = _stack.begin();
	for(int i = 0; i < index; i++, iter++)
		assert(iter != _stack.end());

	// Delete the element
	_stack.erase(iter);
}

int64_t DecoderStack::samples_decoded() const
{
	lock_guard<mutex> decode_lock(_output_mutex);
	return _samples_decoded;
}

std::vector<Row> DecoderStack::get_visible_rows() const
{
	lock_guard<mutex> lock(_output_mutex);

	vector<Row> rows;

	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	{
		assert(dec);
		if (!dec->shown())
			continue;

		const srd_decoder *const decc = dec->decoder();
		assert(dec->decoder());

		// Add a row for the decoder if it doesn't have a row list
		if (!decc->annotation_rows)
			rows.push_back(Row(decc));

		// Add the decoder rows
		for (const GSList *l = decc->annotation_rows; l; l = l->next)
		{
			const srd_decoder_annotation_row *const ann_row =
				(srd_decoder_annotation_row *)l->data;
			assert(ann_row);
			rows.push_back(Row(decc, ann_row));
		}
	}

	return rows;
}

void DecoderStack::get_annotation_subset(
	std::vector<pv::data::decode::Annotation> &dest,
	const Row &row, uint64_t start_sample,
	uint64_t end_sample) const
{
	lock_guard<mutex> lock(_output_mutex);

	std::map<const Row, decode::RowData>::const_iterator iter =
		_rows.find(row);
	if (iter != _rows.end())
		(*iter).second.get_annotation_subset(dest,
			start_sample, end_sample);
}

QString DecoderStack::error_message()
{
	lock_guard<mutex> lock(_output_mutex);
	return _error_message;
}

void DecoderStack::clear()
{
	_sample_count = 0;
	_frame_complete = false;
	_samples_decoded = 0;
	_error_message = QString();
	_rows.clear();
	_class_rows.clear();
}

void DecoderStack::begin_decode()
{
	shared_ptr<pv::view::LogicSignal> logic_signal;
	shared_ptr<pv::data::Logic> data;

	if (_decode_thread.joinable()) {
		_decode_thread.interrupt();
		_decode_thread.join();
	}

	clear();

	// Check that all decoders have the required channels
	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
		if (!dec->have_required_probes()) {
			_error_message = tr("One or more required channels "
				"have not been specified");
			return;
		}

	// Add classes
	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	{
		assert(dec);
		const srd_decoder *const decc = dec->decoder();
		assert(dec->decoder());

		// Add a row for the decoder if it doesn't have a row list
		if (!decc->annotation_rows)
			_rows[Row(decc)] = decode::RowData();

		// Add the decoder rows
		for (const GSList *l = decc->annotation_rows; l; l = l->next)
		{
			const srd_decoder_annotation_row *const ann_row =
				(srd_decoder_annotation_row *)l->data;
			assert(ann_row);

			const Row row(decc, ann_row);

			// Add a new empty row data object
			_rows[row] = decode::RowData();

			// Map out all the classes
			for (const GSList *ll = ann_row->ann_classes;
				ll; ll = ll->next)
				_class_rows[make_pair(decc,
					GPOINTER_TO_INT(ll->data))] = row;
		}
	}

	// We get the logic data of the first channel in the list.
	// This works because we are currently assuming all
	// LogicSignals have the same data/snapshot
	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
		if (dec && !dec->channels().empty() &&
			((logic_signal = (*dec->channels().begin()).second)) &&
			((data = logic_signal->logic_data())))
			break;

	if (!data)
		return;

	// Check we have a snapshot of data
	const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
		data->get_snapshots();
	if (snapshots.empty())
		return;
	_snapshot = snapshots.front();

	// Get the samplerate and start time
	_start_time = data->get_start_time();
	_samplerate = data->samplerate();
	if (_samplerate == 0.0)
		_samplerate = 1.0;

	_decode_thread = boost::thread(&DecoderStack::decode_proc, this);
}

uint64_t DecoderStack::get_max_sample_count() const
{
	uint64_t max_sample_count = 0;

	for (map<const Row, RowData>::const_iterator i = _rows.begin();
		i != _rows.end(); i++)
		max_sample_count = max(max_sample_count,
			(*i).second.get_max_sample());

	return max_sample_count;
}

optional<int64_t> DecoderStack::wait_for_data() const
{
	unique_lock<mutex> input_lock(_input_mutex);
	while(!boost::this_thread::interruption_requested() &&
		!_frame_complete && _samples_decoded >= _sample_count)
		_input_cond.wait(input_lock);
	return boost::make_optional(
		!boost::this_thread::interruption_requested() &&
		(_samples_decoded < _sample_count || !_frame_complete),
		_sample_count);
}

void DecoderStack::decode_data(
	const int64_t sample_count, const unsigned int unit_size,
	srd_session *const session)
{
	uint8_t chunk[DecodeChunkLength];

	const unsigned int chunk_sample_count =
		DecodeChunkLength / _snapshot->unit_size();

	for (int64_t i = 0;
		!boost::this_thread::interruption_requested() &&
			i < sample_count;
		i += chunk_sample_count)
	{
		lock_guard<mutex> decode_lock(_global_decode_mutex);

		const int64_t chunk_end = min(
			i + chunk_sample_count, sample_count);
		_snapshot->get_samples(chunk, i, chunk_end);

		if (srd_session_send(session, i, i + sample_count, chunk,
				(chunk_end - i) * unit_size) != SRD_OK) {
			_error_message = tr("Decoder reported an error");
			break;
		}

		{
			lock_guard<mutex> lock(_output_mutex);
			_samples_decoded = chunk_end;
		}

		if (i % DecodeNotifyPeriod == 0)
			new_decode_data();
	}

	new_decode_data();
}

void DecoderStack::decode_proc()
{
	optional<int64_t> sample_count;
	srd_session *session;
	srd_decoder_inst *prev_di = NULL;

	assert(_snapshot);

	// Create the session
	srd_session_new(&session);
	assert(session);

	// Create the decoders
	const unsigned int unit_size = _snapshot->unit_size();

	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
	{
		srd_decoder_inst *const di = dec->create_decoder_inst(session, unit_size);

		if (!di)
		{
			_error_message = tr("Failed to create decoder instance");
			srd_session_destroy(session);
			return;
		}

		if (prev_di)
			srd_inst_stack (session, prev_di, di);

		prev_di = di;
	}

	// Get the intial sample count
	{
		unique_lock<mutex> input_lock(_input_mutex);
		sample_count = _sample_count = _snapshot->get_sample_count();
	}

	// Start the session
	srd_session_metadata_set(session, SRD_CONF_SAMPLERATE,
		g_variant_new_uint64((uint64_t)_samplerate));

	srd_pd_output_callback_add(session, SRD_OUTPUT_ANN,
		DecoderStack::annotation_callback, this);

	srd_session_start(session);

	do {
		decode_data(*sample_count, unit_size, session);
	} while(_error_message.isEmpty() && (sample_count = wait_for_data()));

	// Destroy the session
	srd_session_destroy(session);
}

void DecoderStack::annotation_callback(srd_proto_data *pdata, void *decoder)
{
	assert(pdata);
	assert(decoder);

	DecoderStack *const d = (DecoderStack*)decoder;
	assert(d);

	lock_guard<mutex> lock(d->_output_mutex);

	const Annotation a(pdata);

	// Find the row
	assert(pdata->pdo);
	assert(pdata->pdo->di);
	const srd_decoder *const decc = pdata->pdo->di->decoder;
	assert(decc);

	map<const Row, decode::RowData>::iterator row_iter = d->_rows.end();
	
	// Try looking up the sub-row of this class
	const map<pair<const srd_decoder*, int>, Row>::const_iterator r =
		d->_class_rows.find(make_pair(decc, a.format()));
	if (r != d->_class_rows.end())
		row_iter = d->_rows.find((*r).second);
	else
	{
		// Failing that, use the decoder as a key
		row_iter = d->_rows.find(Row(decc));	
	}

	assert(row_iter != d->_rows.end());
	if (row_iter == d->_rows.end()) {
		qDebug() << "Unexpected annotation: decoder = " << decc <<
			", format = " << a.format();
		assert(0);
		return;
	}

	// Add the annotation
	(*row_iter).second.push_annotation(a);
}

void DecoderStack::on_new_frame()
{
	begin_decode();
}

void DecoderStack::on_data_received()
{
	{
		unique_lock<mutex> lock(_input_mutex);
		if (_snapshot)
			_sample_count = _snapshot->get_sample_count();
	}
	_input_cond.notify_one();
}

void DecoderStack::on_frame_ended()
{
	{
		unique_lock<mutex> lock(_input_mutex);
		if (_snapshot)
			_frame_complete = true;
	}
	_input_cond.notify_one();
}

} // namespace data
} // namespace pv
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012 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	#include <libsigrokdecode/libsigrokdecode.h>
	22
	23	#include <boost/foreach.hpp>
	24	#include <boost/thread/thread.hpp>
	25
	26	#include <stdexcept>
	27
	28	#include <QDebug>
	29
	30	#include "decoderstack.h"
	31
	32	#include <pv/data/logic.h>
	33	#include <pv/data/logicsnapshot.h>
	34	#include <pv/data/decode/decoder.h>
	35	#include <pv/data/decode/annotation.h>
	36	#include <pv/sigsession.h>
	37	#include <pv/view/logicsignal.h>
	38
	39	using boost::lock_guard;
	40	using boost::mutex;
	41	using boost::optional;
	42	using boost::shared_ptr;
	43	using boost::unique_lock;
	44	using std::deque;
	45	using std::make_pair;
	46	using std::max;
	47	using std::min;
	48	using std::list;
	49	using std::map;
	50	using std::pair;
	51	using std::vector;
	52
	53	using namespace pv::data::decode;
	54
	55	namespace pv {
	56	namespace data {
	57
	58	const double DecoderStack::DecodeMargin = 1.0;
	59	const double DecoderStack::DecodeThreshold = 0.2;
	60	const int64_t DecoderStack::DecodeChunkLength = 4096;
	61	const unsigned int DecoderStack::DecodeNotifyPeriod = 65536;
	62
	63	mutex DecoderStack::_global_decode_mutex;
	64
	65	DecoderStack::DecoderStack(pv::SigSession &session,
	66	const srd_decoder *const dec) :
	67	_session(session),
	68	_sample_count(0),
	69	_frame_complete(false),
	70	_samples_decoded(0)
	71	{
	72	connect(&_session, SIGNAL(frame_began()),
	73	this, SLOT(on_new_frame()));
	74	connect(&_session, SIGNAL(data_received()),
	75	this, SLOT(on_data_received()));
	76	connect(&_session, SIGNAL(frame_ended()),
	77	this, SLOT(on_frame_ended()));
	78
	79	_stack.push_back(shared_ptr<decode::Decoder>(
	80	new decode::Decoder(dec)));
	81	}
	82
	83	DecoderStack::~DecoderStack()
	84	{
	85	if (_decode_thread.joinable()) {
	86	_decode_thread.interrupt();
	87	_decode_thread.join();
	88	}
	89	}
	90
	91	const std::list< boost::shared_ptr<decode::Decoder> >&
	92	DecoderStack::stack() const
	93	{
	94	return _stack;
	95	}
	96
	97	void DecoderStack::push(boost::shared_ptr<decode::Decoder> decoder)
	98	{
	99	assert(decoder);
	100	_stack.push_back(decoder);
	101	}
	102
	103	void DecoderStack::remove(int index)
	104	{
	105	assert(index >= 0);
	106	assert(index < (int)_stack.size());
	107
	108	// Find the decoder in the stack
	109	list< shared_ptr<Decoder> >::iterator iter = _stack.begin();
	110	for(int i = 0; i < index; i++, iter++)
	111	assert(iter != _stack.end());
	112
	113	// Delete the element
	114	_stack.erase(iter);
	115	}
	116
	117	int64_t DecoderStack::samples_decoded() const
	118	{
	119	lock_guard<mutex> decode_lock(_output_mutex);
	120	return _samples_decoded;
	121	}
	122
	123	std::vector<Row> DecoderStack::get_visible_rows() const
	124	{
	125	lock_guard<mutex> lock(_output_mutex);
	126
	127	vector<Row> rows;
	128
	129	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	130	{
	131	assert(dec);
	132	if (!dec->shown())
	133	continue;
	134
	135	const srd_decoder *const decc = dec->decoder();
	136	assert(dec->decoder());
	137
	138	// Add a row for the decoder if it doesn't have a row list
	139	if (!decc->annotation_rows)
	140	rows.push_back(Row(decc));
	141
	142	// Add the decoder rows
	143	for (const GSList *l = decc->annotation_rows; l; l = l->next)
	144	{
	145	const srd_decoder_annotation_row *const ann_row =
	146	(srd_decoder_annotation_row *)l->data;
	147	assert(ann_row);
	148	rows.push_back(Row(decc, ann_row));
	149	}
	150	}
	151
	152	return rows;
	153	}
	154
	155	void DecoderStack::get_annotation_subset(
	156	std::vector<pv::data::decode::Annotation> &dest,
	157	const Row &row, uint64_t start_sample,
	158	uint64_t end_sample) const
	159	{
	160	lock_guard<mutex> lock(_output_mutex);
	161
	162	std::map<const Row, decode::RowData>::const_iterator iter =
	163	_rows.find(row);
	164	if (iter != _rows.end())
	165	(*iter).second.get_annotation_subset(dest,
	166	start_sample, end_sample);
	167	}
	168
	169	QString DecoderStack::error_message()
	170	{
	171	lock_guard<mutex> lock(_output_mutex);
	172	return _error_message;
	173	}
	174
	175	void DecoderStack::clear()
	176	{
	177	_sample_count = 0;
	178	_frame_complete = false;
	179	_samples_decoded = 0;
	180	_error_message = QString();
	181	_rows.clear();
	182	_class_rows.clear();
	183	}
	184
	185	void DecoderStack::begin_decode()
	186	{
	187	shared_ptr<pv::view::LogicSignal> logic_signal;
	188	shared_ptr<pv::data::Logic> data;
	189
	190	if (_decode_thread.joinable()) {
	191	_decode_thread.interrupt();
	192	_decode_thread.join();
	193	}
	194
	195	clear();
	196
	197	// Check that all decoders have the required channels
	198	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
	199	if (!dec->have_required_probes()) {
	200	_error_message = tr("One or more required channels "
	201	"have not been specified");
	202	return;
	203	}
	204
	205	// Add classes
	206	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	207	{
	208	assert(dec);
	209	const srd_decoder *const decc = dec->decoder();
	210	assert(dec->decoder());
	211
	212	// Add a row for the decoder if it doesn't have a row list
	213	if (!decc->annotation_rows)
	214	_rows[Row(decc)] = decode::RowData();
	215
	216	// Add the decoder rows
	217	for (const GSList *l = decc->annotation_rows; l; l = l->next)
	218	{
	219	const srd_decoder_annotation_row *const ann_row =
	220	(srd_decoder_annotation_row *)l->data;
	221	assert(ann_row);
	222
	223	const Row row(decc, ann_row);
	224
	225	// Add a new empty row data object
	226	_rows[row] = decode::RowData();
	227
	228	// Map out all the classes
	229	for (const GSList *ll = ann_row->ann_classes;
	230	ll; ll = ll->next)
	231	_class_rows[make_pair(decc,
	232	GPOINTER_TO_INT(ll->data))] = row;
	233	}
	234	}
	235
	236	// We get the logic data of the first channel in the list.
	237	// This works because we are currently assuming all
	238	// LogicSignals have the same data/snapshot
	239	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	240	if (dec && !dec->channels().empty() &&
	241	((logic_signal = (*dec->channels().begin()).second)) &&
	242	((data = logic_signal->logic_data())))
	243	break;
	244
	245	if (!data)
	246	return;
	247
	248	// Check we have a snapshot of data
	249	const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
	250	data->get_snapshots();
	251	if (snapshots.empty())
	252	return;
	253	_snapshot = snapshots.front();
	254
	255	// Get the samplerate and start time
	256	_start_time = data->get_start_time();
	257	_samplerate = data->samplerate();
	258	if (_samplerate == 0.0)
	259	_samplerate = 1.0;
	260
	261	_decode_thread = boost::thread(&DecoderStack::decode_proc, this);
	262	}
	263
	264	uint64_t DecoderStack::get_max_sample_count() const
	265	{
	266	uint64_t max_sample_count = 0;
	267
	268	for (map<const Row, RowData>::const_iterator i = _rows.begin();
	269	i != _rows.end(); i++)
	270	max_sample_count = max(max_sample_count,
	271	(*i).second.get_max_sample());
	272
	273	return max_sample_count;
	274	}
	275
	276	optional<int64_t> DecoderStack::wait_for_data() const
	277	{
	278	unique_lock<mutex> input_lock(_input_mutex);
	279	while(!boost::this_thread::interruption_requested() &&
	280	!_frame_complete && _samples_decoded >= _sample_count)
	281	_input_cond.wait(input_lock);
	282	return boost::make_optional(
	283	!boost::this_thread::interruption_requested() &&
	284	(_samples_decoded < _sample_count \|\| !_frame_complete),
	285	_sample_count);
	286	}
	287
	288	void DecoderStack::decode_data(
	289	const int64_t sample_count, const unsigned int unit_size,
	290	srd_session *const session)
	291	{
	292	uint8_t chunk[DecodeChunkLength];
	293
	294	const unsigned int chunk_sample_count =
	295	DecodeChunkLength / _snapshot->unit_size();
	296
	297	for (int64_t i = 0;
	298	!boost::this_thread::interruption_requested() &&
	299	i < sample_count;
	300	i += chunk_sample_count)
	301	{
	302	lock_guard<mutex> decode_lock(_global_decode_mutex);
	303
	304	const int64_t chunk_end = min(
	305	i + chunk_sample_count, sample_count);
	306	_snapshot->get_samples(chunk, i, chunk_end);
	307
	308	if (srd_session_send(session, i, i + sample_count, chunk,
	309	(chunk_end - i) * unit_size) != SRD_OK) {
	310	_error_message = tr("Decoder reported an error");
	311	break;
	312	}
	313
	314	{
	315	lock_guard<mutex> lock(_output_mutex);
	316	_samples_decoded = chunk_end;
	317	}
	318
	319	if (i % DecodeNotifyPeriod == 0)
	320	new_decode_data();
	321	}
	322
	323	new_decode_data();
	324	}
	325
	326	void DecoderStack::decode_proc()
	327	{
	328	optional<int64_t> sample_count;
	329	srd_session *session;
	330	srd_decoder_inst *prev_di = NULL;
	331
	332	assert(_snapshot);
	333
	334	// Create the session
	335	srd_session_new(&session);
	336	assert(session);
	337
	338	// Create the decoders
	339	const unsigned int unit_size = _snapshot->unit_size();
	340
	341	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
	342	{
	343	srd_decoder_inst *const di = dec->create_decoder_inst(session, unit_size);
	344
	345	if (!di)
	346	{
	347	_error_message = tr("Failed to create decoder instance");
	348	srd_session_destroy(session);
	349	return;
	350	}
	351
	352	if (prev_di)
	353	srd_inst_stack (session, prev_di, di);
	354
	355	prev_di = di;
	356	}
	357
	358	// Get the intial sample count
	359	{
	360	unique_lock<mutex> input_lock(_input_mutex);
	361	sample_count = _sample_count = _snapshot->get_sample_count();
	362	}
	363
	364	// Start the session
	365	srd_session_metadata_set(session, SRD_CONF_SAMPLERATE,
	366	g_variant_new_uint64((uint64_t)_samplerate));
	367
	368	srd_pd_output_callback_add(session, SRD_OUTPUT_ANN,
	369	DecoderStack::annotation_callback, this);
	370
	371	srd_session_start(session);
	372
	373	do {
	374	decode_data(*sample_count, unit_size, session);
	375	} while(_error_message.isEmpty() && (sample_count = wait_for_data()));
	376
	377	// Destroy the session
	378	srd_session_destroy(session);
	379	}
	380
	381	void DecoderStack::annotation_callback(srd_proto_data pdata, void decoder)
	382	{
	383	assert(pdata);
	384	assert(decoder);
	385
	386	DecoderStack const d = (DecoderStack)decoder;
	387	assert(d);
	388
	389	lock_guard<mutex> lock(d->_output_mutex);
	390
	391	const Annotation a(pdata);
	392
	393	// Find the row
	394	assert(pdata->pdo);
	395	assert(pdata->pdo->di);
	396	const srd_decoder *const decc = pdata->pdo->di->decoder;
	397	assert(decc);
	398
	399	map<const Row, decode::RowData>::iterator row_iter = d->_rows.end();
	400
	401	// Try looking up the sub-row of this class
	402	const map<pair<const srd_decoder*, int>, Row>::const_iterator r =
	403	d->_class_rows.find(make_pair(decc, a.format()));
	404	if (r != d->_class_rows.end())
	405	row_iter = d->_rows.find((*r).second);
	406	else
	407	{
	408	// Failing that, use the decoder as a key
	409	row_iter = d->_rows.find(Row(decc));
	410	}
	411
	412	assert(row_iter != d->_rows.end());
	413	if (row_iter == d->_rows.end()) {
	414	qDebug() << "Unexpected annotation: decoder = " << decc <<
	415	", format = " << a.format();
	416	assert(0);
	417	return;
	418	}
	419
	420	// Add the annotation
	421	(*row_iter).second.push_annotation(a);
	422	}
	423
	424	void DecoderStack::on_new_frame()
	425	{
	426	begin_decode();
	427	}
	428
	429	void DecoderStack::on_data_received()
	430	{
	431	{
	432	unique_lock<mutex> lock(_input_mutex);
	433	if (_snapshot)
	434	_sample_count = _snapshot->get_sample_count();
	435	}
	436	_input_cond.notify_one();
	437	}
	438
	439	void DecoderStack::on_frame_ended()
	440	{
	441	{
	442	unique_lock<mutex> lock(_input_mutex);
	443	if (_snapshot)
	444	_frame_complete = true;
	445	}
	446	_input_cond.notify_one();
	447	}
	448
	449	} // namespace data
	450	} // namespace pv