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>
27 #include <pv/data/logic.h>
28 #include <pv/data/logicsnapshot.h>
29 #include <pv/view/logicsignal.h>
30 #include <pv/view/decode/annotation.h>
32 using namespace boost;
38 const double Decoder::DecodeMargin = 1.0;
39 const double Decoder::DecodeThreshold = 0.2;
40 const int64_t Decoder::DecodeChunkLength = 4096;
42 Decoder::Decoder(const srd_decoder *const dec,
43 std::map<const srd_probe*,
44 boost::shared_ptr<pv::view::Signal> > probes) :
55 _decode_thread.interrupt();
56 _decode_thread.join();
59 const srd_decoder* Decoder::get_decoder() const
64 const vector< shared_ptr<view::decode::Annotation> >
65 Decoder::annotations() const
67 lock_guard<mutex> lock(_annotations_mutex);
71 void Decoder::begin_decode()
73 _decode_thread.interrupt();
74 _decode_thread.join();
79 // We get the logic data of the first probe in the list.
80 // This works because we are currently assuming all
81 // LogicSignals have the same data/snapshot
82 shared_ptr<pv::view::Signal> sig = (*_probes.begin()).second;
84 const pv::view::LogicSignal *const l =
85 dynamic_cast<pv::view::LogicSignal*>(sig.get());
87 shared_ptr<data::Logic> data = l->data();
89 _decode_thread = boost::thread(&Decoder::decode_proc, this,
93 void Decoder::clear_snapshots()
97 void Decoder::init_decoder()
101 shared_ptr<pv::view::LogicSignal> logic_signal =
102 dynamic_pointer_cast<pv::view::LogicSignal>(
103 (*_probes.begin()).second);
105 shared_ptr<pv::data::Logic> data(
106 logic_signal->data());
108 _samplerate = data->get_samplerate();
109 _start_time = data->get_start_time();
114 _decoder_inst = srd_inst_new(_decoder->id, NULL);
115 assert(_decoder_inst);
117 _decoder_inst->data_samplerate = _samplerate;
119 GHashTable *probes = g_hash_table_new_full(g_str_hash,
120 g_str_equal, g_free, (GDestroyNotify)g_variant_unref);
122 for(map<const srd_probe*, shared_ptr<view::Signal> >::
123 const_iterator i = _probes.begin();
124 i != _probes.end(); i++)
126 shared_ptr<view::Signal> signal((*i).second);
127 GVariant *const gvar = g_variant_new_int32(
128 signal->probe()->index);
129 g_variant_ref_sink(gvar);
130 g_hash_table_insert(probes, (*i).first->id, gvar);
133 srd_inst_probe_set_all(_decoder_inst, probes);
136 void Decoder::decode_proc(shared_ptr<data::Logic> data)
138 uint8_t chunk[DecodeChunkLength];
142 _annotations.clear();
144 const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
145 data->get_snapshots();
146 if (snapshots.empty())
149 const shared_ptr<pv::data::LogicSnapshot> &snapshot =
151 const int64_t sample_count = snapshot->get_sample_count() - 1;
152 double samplerate = data->get_samplerate();
154 // Show sample rate as 1Hz when it is unknown
155 if (samplerate == 0.0)
158 srd_session_start(_probes.size(), snapshot->unit_size(), samplerate);
160 srd_pd_output_callback_add(SRD_OUTPUT_ANN,
161 Decoder::annotation_callback, this);
164 !this_thread::interruption_requested() && i < sample_count;
165 i += DecodeChunkLength)
167 const int64_t chunk_end = min(
168 i + DecodeChunkLength, sample_count);
169 snapshot->get_samples(chunk, i, chunk_end);
171 if (srd_session_send(i, chunk, chunk_end - i) != SRD_OK)
176 void Decoder::annotation_callback(srd_proto_data *pdata, void *decoder)
178 using namespace pv::view::decode;
183 Decoder *const d = (Decoder*)decoder;
185 shared_ptr<Annotation> a(new Annotation(pdata));
186 lock_guard<mutex> lock(d->_annotations_mutex);
187 d->_annotations.push_back(a);