2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
21 #include <libsigrokdecode/libsigrokdecode.h>
23 #include <boost/thread/thread.hpp>
31 #include <pv/data/logic.h>
32 #include <pv/data/logicsnapshot.h>
33 #include <pv/view/logicsignal.h>
34 #include <pv/view/decode/annotation.h>
36 using namespace boost;
42 const double Decoder::DecodeMargin = 1.0;
43 const double Decoder::DecodeThreshold = 0.2;
44 const int64_t Decoder::DecodeChunkLength = 4096;
46 Decoder::Decoder(const srd_decoder *const dec,
47 std::map<const srd_probe*,
48 boost::shared_ptr<pv::view::Signal> > probes,
49 GHashTable *options) :
57 throw runtime_error("Failed to initialise decoder.");
64 _decode_thread.interrupt();
65 _decode_thread.join();
67 g_hash_table_destroy(_options);
70 srd_session_destroy(_session);
73 const srd_decoder* Decoder::get_decoder() const
78 const vector< shared_ptr<view::decode::Annotation> >
79 Decoder::annotations() const
81 lock_guard<mutex> lock(_annotations_mutex);
85 void Decoder::begin_decode()
87 _decode_thread.interrupt();
88 _decode_thread.join();
93 // We get the logic data of the first probe in the list.
94 // This works because we are currently assuming all
95 // LogicSignals have the same data/snapshot
96 shared_ptr<pv::view::Signal> sig = (*_probes.begin()).second;
98 const pv::view::LogicSignal *const l =
99 dynamic_cast<pv::view::LogicSignal*>(sig.get());
101 shared_ptr<data::Logic> data = l->data();
103 _decode_thread = boost::thread(&Decoder::decode_proc, this,
107 void Decoder::clear_snapshots()
111 bool Decoder::init_decoder()
113 if (!_probes.empty())
115 shared_ptr<pv::view::LogicSignal> logic_signal =
116 dynamic_pointer_cast<pv::view::LogicSignal>(
117 (*_probes.begin()).second);
119 shared_ptr<pv::data::Logic> data(
120 logic_signal->data());
122 _samplerate = data->get_samplerate();
123 _start_time = data->get_start_time();
128 srd_session_new(&_session);
131 _decoder_inst = srd_inst_new(_session, _decoder->id, _options);
133 qDebug() << "Failed to initialise decoder";
137 _decoder_inst->data_samplerate = _samplerate;
139 GHashTable *probes = g_hash_table_new_full(g_str_hash,
140 g_str_equal, g_free, (GDestroyNotify)g_variant_unref);
142 for(map<const srd_probe*, shared_ptr<view::Signal> >::
143 const_iterator i = _probes.begin();
144 i != _probes.end(); i++)
146 shared_ptr<view::Signal> signal((*i).second);
147 GVariant *const gvar = g_variant_new_int32(
148 signal->probe()->index);
149 g_variant_ref_sink(gvar);
150 g_hash_table_insert(probes, (*i).first->id, gvar);
153 srd_inst_probe_set_all(_decoder_inst, probes);
158 void Decoder::decode_proc(shared_ptr<data::Logic> data)
160 uint8_t chunk[DecodeChunkLength];
164 _annotations.clear();
166 const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
167 data->get_snapshots();
168 if (snapshots.empty())
171 const shared_ptr<pv::data::LogicSnapshot> &snapshot =
173 const int64_t sample_count = snapshot->get_sample_count() - 1;
174 double samplerate = data->get_samplerate();
176 // Show sample rate as 1Hz when it is unknown
177 if (samplerate == 0.0)
180 srd_session_config_set(_session, SRD_CONF_NUM_PROBES,
181 g_variant_new_uint64(_probes.size()));
182 srd_session_config_set(_session, SRD_CONF_UNITSIZE,
183 g_variant_new_uint64(snapshot->unit_size()));
184 srd_session_config_set(_session, SRD_CONF_SAMPLERATE,
185 g_variant_new_uint64((uint64_t)samplerate));
187 srd_session_start(_session);
189 srd_pd_output_callback_add(_session, SRD_OUTPUT_ANN,
190 Decoder::annotation_callback, this);
193 !this_thread::interruption_requested() && i < sample_count;
194 i += DecodeChunkLength)
196 const int64_t chunk_end = min(
197 i + DecodeChunkLength, sample_count);
198 snapshot->get_samples(chunk, i, chunk_end);
200 if (srd_session_send(_session, i, chunk, chunk_end - i) !=
206 void Decoder::annotation_callback(srd_proto_data *pdata, void *decoder)
208 using namespace pv::view::decode;
213 Decoder *const d = (Decoder*)decoder;
215 shared_ptr<Annotation> a(new Annotation(pdata));
216 lock_guard<mutex> lock(d->_annotations_mutex);
217 d->_annotations.push_back(a);
219 d->new_decode_data();