[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 probes
	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
		if (!dec->have_required_probes()) {
			_error_message = tr("One or more required probes "
				"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 probe 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->probes().empty() &&
			((logic_signal = (*dec->probes().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(data);
	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
119aff65 JH	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
e332f6d3 JH	21	#include <libsigrokdecode/libsigrokdecode.h>
e332f6d3 JH	22
7491a29f	23	#include <boost/foreach.hpp>
e0fc5810 JH	24	#include <boost/thread/thread.hpp>
e0fc5810 JH	25
e92cd4e4 JH	26	#include <stdexcept>
e92cd4e4 JH	27
b213ef09 JH	28	#include <QDebug>
b213ef09 JH	29
6e89374a	30	#include "decoderstack.h"
119aff65	31
e0fc5810 JH	32	#include <pv/data/logic.h>
e0fc5810 JH	33	#include <pv/data/logicsnapshot.h>
7491a29f	34	#include <pv/data/decode/decoder.h>
06e810f2	35	#include <pv/data/decode/annotation.h>
82f50b10	36	#include <pv/sigsession.h>
e0fc5810	37	#include <pv/view/logicsignal.h>
708c5523	38
819f4c25 JH	39	using boost::lock_guard;
819f4c25 JH	40	using boost::mutex;
f70d8673	41	using boost::optional;
819f4c25	42	using boost::shared_ptr;
f70d8673	43	using boost::unique_lock;
819f4c25	44	using std::deque;
f9101a91 JH	45	using std::make_pair;
f9101a91 JH	46	using std::max;
819f4c25 JH	47	using std::min;
819f4c25 JH	48	using std::list;
f9101a91 JH	49	using std::map;
f9101a91 JH	50	using std::pair;
819f4c25	51	using std::vector;
e332f6d3	52
f9101a91 JH	53	using namespace pv::data::decode;
f9101a91 JH	54
119aff65 JH	55	namespace pv {
	56	namespace data {
	57
6e89374a JH	58	const double DecoderStack::DecodeMargin = 1.0;
	59	const double DecoderStack::DecodeThreshold = 0.2;
	60	const int64_t DecoderStack::DecodeChunkLength = 4096;
4c581c79	61	const unsigned int DecoderStack::DecodeNotifyPeriod = 65536;
e0fc5810	62
6e89374a	63	mutex DecoderStack::_global_decode_mutex;
fe89c961	64
bdc5c3b0 JH	65	DecoderStack::DecoderStack(pv::SigSession &session,
	66	const srd_decoder *const dec) :
	67	_session(session),
f70d8673 JH	68	_sample_count(0),
f70d8673 JH	69	_frame_complete(false),
5dfeb70f	70	_samples_decoded(0)
119aff65	71	{
f70d8673 JH	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()));
82f50b10	78
7491a29f JH	79	_stack.push_back(shared_ptr<decode::Decoder>(
7491a29f JH	80	new decode::Decoder(dec)));
119aff65 JH	81	}
119aff65 JH	82
6e89374a	83	DecoderStack::~DecoderStack()
640d69ce	84	{
6d483b8b MC	85	if (_decode_thread.joinable()) {
	86	_decode_thread.interrupt();
	87	_decode_thread.join();
	88	}
4e5a4405 JH	89	}
4e5a4405 JH	90
7491a29f JH	91	const std::list< boost::shared_ptr<decode::Decoder> >&
7491a29f JH	92	DecoderStack::stack() const
4e5a4405	93	{
7491a29f	94	return _stack;
4e5a4405 JH	95	}
4e5a4405 JH	96
7491a29f	97	void DecoderStack::push(boost::shared_ptr<decode::Decoder> decoder)
4e5a4405	98	{
7491a29f JH	99	assert(decoder);
7491a29f JH	100	_stack.push_back(decoder);
4e5a4405 JH	101	}
4e5a4405 JH	102
613d097c JH	103	void DecoderStack::remove(int index)
613d097c JH	104	{
613d097c JH	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
5dfeb70f JH	117	int64_t DecoderStack::samples_decoded() const
5dfeb70f JH	118	{
28b9cc08	119	lock_guard<mutex> decode_lock(_output_mutex);
5dfeb70f JH	120	return _samples_decoded;
	121	}
	122
dd048a7e	123	std::vector<Row> DecoderStack::get_visible_rows() const
f9101a91	124	{
28b9cc08	125	lock_guard<mutex> lock(_output_mutex);
f9101a91 JH	126
	127	vector<Row> rows;
	128
	129	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	130	{
	131	assert(dec);
dd048a7e JH	132	if (!dec->shown())
	133	continue;
	134
f9101a91 JH	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
92421299 JH	155	void DecoderStack::get_annotation_subset(
92421299 JH	156	std::vector<pv::data::decode::Annotation> &dest,
f9101a91 JH	157	const Row &row, uint64_t start_sample,
f9101a91 JH	158	uint64_t end_sample) const
e0fc5810	159	{
28b9cc08	160	lock_guard<mutex> lock(_output_mutex);
92421299	161
f9101a91 JH	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);
e0fc5810 JH	167	}
e0fc5810 JH	168
6e89374a	169	QString DecoderStack::error_message()
b6b267bb	170	{
28b9cc08	171	lock_guard<mutex> lock(_output_mutex);
b6b267bb JH	172	return _error_message;
	173	}
	174
f9101a91 JH	175	void DecoderStack::clear()
f9101a91 JH	176	{
f70d8673 JH	177	_sample_count = 0;
f70d8673 JH	178	_frame_complete = false;
f9101a91 JH	179	_samples_decoded = 0;
	180	_error_message = QString();
	181	_rows.clear();
	182	_class_rows.clear();
	183	}
	184
6e89374a	185	void DecoderStack::begin_decode()
640d69ce	186	{
7491a29f JH	187	shared_ptr<pv::view::LogicSignal> logic_signal;
	188	shared_ptr<pv::data::Logic> data;
	189
6d483b8b MC	190	if (_decode_thread.joinable()) {
	191	_decode_thread.interrupt();
	192	_decode_thread.join();
	193	}
640d69ce	194
92421299	195	clear();
4e5a4405	196
df4c1a06 JH	197	// Check that all decoders have the required probes
	198	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
	199	if (!dec->have_required_probes()) {
	200	_error_message = tr("One or more required probes "
	201	"have not been specified");
	202	return;
	203	}
	204
f9101a91 JH	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
e0fc5810 JH	236	// We get the logic data of the first probe in the list.
	237	// This works because we are currently assuming all
	238	// LogicSignals have the same data/snapshot
7491a29f JH	239	BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
	240	if (dec && !dec->probes().empty() &&
	241	((logic_signal = (*dec->probes().begin()).second)) &&
7aa09b00	242	((data = logic_signal->logic_data())))
7491a29f JH	243	break;
	244
	245	if (!data)
	246	return;
	247
f70d8673 JH	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
7491a29f JH	255	// Get the samplerate and start time
7491a29f JH	256	_start_time = data->get_start_time();
9d28da5a	257	_samplerate = data->samplerate();
7491a29f JH	258	if (_samplerate == 0.0)
7491a29f JH	259	_samplerate = 1.0;
e0fc5810	260
c1b2865e	261	_decode_thread = boost::thread(&DecoderStack::decode_proc, this);
640d69ce JH	262	}
640d69ce JH	263
a007f5ad JH	264	uint64_t DecoderStack::get_max_sample_count() const
a007f5ad JH	265	{
f9101a91 JH	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;
a007f5ad JH	274	}
a007f5ad JH	275
f70d8673 JH	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
f67d9e9b	288	void DecoderStack::decode_data(
f70d8673	289	const int64_t sample_count, const unsigned int unit_size,
f67d9e9b JH	290	srd_session *const session)
	291	{
	292	uint8_t chunk[DecodeChunkLength];
	293
f67d9e9b	294	const unsigned int chunk_sample_count =
f70d8673	295	DecodeChunkLength / _snapshot->unit_size();
f67d9e9b JH	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);
f70d8673	306	_snapshot->get_samples(chunk, i, chunk_end);
f67d9e9b JH	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	{
28b9cc08	315	lock_guard<mutex> lock(_output_mutex);
f67d9e9b JH	316	_samples_decoded = chunk_end;
f67d9e9b JH	317	}
4c581c79 JH	318
	319	if (i % DecodeNotifyPeriod == 0)
	320	new_decode_data();
f67d9e9b JH	321	}
f67d9e9b JH	322
1c5fb759	323	new_decode_data();
f67d9e9b JH	324	}
f67d9e9b JH	325
c1b2865e	326	void DecoderStack::decode_proc()
119aff65	327	{
f70d8673	328	optional<int64_t> sample_count;
b6b267bb	329	srd_session *session;
7491a29f	330	srd_decoder_inst *prev_di = NULL;
e0fc5810 JH	331
e0fc5810 JH	332	assert(data);
f70d8673	333	assert(_snapshot);
e0fc5810	334
b6b267bb JH	335	// Create the session
	336	srd_session_new(&session);
	337	assert(session);
e0fc5810	338
7491a29f	339	// Create the decoders
f70d8673	340	const unsigned int unit_size = _snapshot->unit_size();
f67d9e9b	341
7491a29f JH	342	BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
7491a29f JH	343	{
13a3528c	344	srd_decoder_inst *const di = dec->create_decoder_inst(session, unit_size);
e0fc5810	345
7491a29f JH	346	if (!di)
7491a29f JH	347	{
8a290daf	348	_error_message = tr("Failed to create decoder instance");
7491a29f JH	349	srd_session_destroy(session);
	350	return;
	351	}
b6b267bb	352
7491a29f JH	353	if (prev_di)
7491a29f JH	354	srd_inst_stack (session, prev_di, di);
b6b267bb	355
7491a29f	356	prev_di = di;
b6b267bb JH	357	}
b6b267bb JH	358
f70d8673 JH	359	// Get the intial sample count
	360	{
	361	unique_lock<mutex> input_lock(_input_mutex);
	362	sample_count = _sample_count = _snapshot->get_sample_count();
	363	}
	364
b6b267bb	365	// Start the session
7491a29f JH	366	srd_session_metadata_set(session, SRD_CONF_SAMPLERATE,
	367	g_variant_new_uint64((uint64_t)_samplerate));
	368
	369	srd_pd_output_callback_add(session, SRD_OUTPUT_ANN,
	370	DecoderStack::annotation_callback, this);
	371
b6b267bb JH	372	srd_session_start(session);
b6b267bb JH	373
f70d8673 JH	374	do {
	375	decode_data(*sample_count, unit_size, session);
	376	} while(_error_message.isEmpty() && (sample_count = wait_for_data()));
b6b267bb JH	377
	378	// Destroy the session
	379	srd_session_destroy(session);
e0fc5810 JH	380	}
e0fc5810 JH	381
6e89374a	382	void DecoderStack::annotation_callback(srd_proto_data pdata, void decoder)
e0fc5810	383	{
e0fc5810 JH	384	assert(pdata);
	385	assert(decoder);
	386
6e89374a	387	DecoderStack const d = (DecoderStack)decoder;
f9101a91	388	assert(d);
e0fc5810	389
28b9cc08	390	lock_guard<mutex> lock(d->_output_mutex);
6d8b0562	391
f9101a91 JH	392	const Annotation a(pdata);
	393
	394	// Find the row
	395	assert(pdata->pdo);
	396	assert(pdata->pdo->di);
	397	const srd_decoder *const decc = pdata->pdo->di->decoder;
	398	assert(decc);
	399
	400	map<const Row, decode::RowData>::iterator row_iter = d->_rows.end();
	401
	402	// Try looking up the sub-row of this class
	403	const map<pair<const srd_decoder*, int>, Row>::const_iterator r =
	404	d->_class_rows.find(make_pair(decc, a.format()));
	405	if (r != d->_class_rows.end())
	406	row_iter = d->_rows.find((*r).second);
	407	else
6d8b0562	408	{
f9101a91 JH	409	// Failing that, use the decoder as a key
f9101a91 JH	410	row_iter = d->_rows.find(Row(decc));
6d8b0562 UH	411	}
6d8b0562 UH	412
f9101a91 JH	413	assert(row_iter != d->_rows.end());
	414	if (row_iter == d->_rows.end()) {
	415	qDebug() << "Unexpected annotation: decoder = " << decc <<
	416	", format = " << a.format();
	417	assert(0);
	418	return;
	419	}
9cef9567	420
f9101a91 JH	421	// Add the annotation
f9101a91 JH	422	(*row_iter).second.push_annotation(a);
119aff65 JH	423	}
119aff65 JH	424
82f50b10 JH	425	void DecoderStack::on_new_frame()
	426	{
	427	begin_decode();
	428	}
	429
f70d8673 JH	430	void DecoderStack::on_data_received()
	431	{
	432	{
	433	unique_lock<mutex> lock(_input_mutex);
46bf6027 JH	434	if (_snapshot)
46bf6027 JH	435	_sample_count = _snapshot->get_sample_count();
f70d8673 JH	436	}
	437	_input_cond.notify_one();
	438	}
	439
	440	void DecoderStack::on_frame_ended()
	441	{
	442	{
	443	unique_lock<mutex> lock(_input_mutex);
46bf6027 JH	444	if (_snapshot)
46bf6027 JH	445	_frame_complete = true;
f70d8673 JH	446	}
	447	_input_cond.notify_one();
	448	}
	449
119aff65 JH	450	} // namespace data
119aff65 JH	451	} // namespace pv