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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/thread/thread.hpp> | |
24 | ||
25 | #include <stdexcept> | |
26 | ||
27 | #include <QDebug> | |
28 | ||
29 | #include "decoder.h" | |
30 | ||
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> | |
35 | ||
36 | using namespace boost; | |
37 | using namespace std; | |
38 | ||
39 | namespace pv { | |
40 | namespace data { | |
41 | ||
42 | const double Decoder::DecodeMargin = 1.0; | |
43 | const double Decoder::DecodeThreshold = 0.2; | |
44 | const int64_t Decoder::DecodeChunkLength = 4096; | |
45 | ||
46 | Decoder::Decoder(const srd_decoder *const dec, | |
47 | std::map<const srd_probe*, | |
48 | boost::shared_ptr<pv::view::LogicSignal> > probes, | |
49 | GHashTable *options) : | |
50 | _decoder(dec), | |
51 | _probes(probes), | |
52 | _options(options), | |
53 | _session(NULL), | |
54 | _decoder_inst(NULL) | |
55 | { | |
56 | if (!init_decoder()) | |
57 | throw runtime_error("Failed to initialise decoder."); | |
58 | ||
59 | begin_decode(); | |
60 | } | |
61 | ||
62 | Decoder::~Decoder() | |
63 | { | |
64 | _decode_thread.interrupt(); | |
65 | _decode_thread.join(); | |
66 | ||
67 | g_hash_table_destroy(_options); | |
68 | ||
69 | if (_session) | |
70 | srd_session_destroy(_session); | |
71 | } | |
72 | ||
73 | const srd_decoder* Decoder::get_decoder() const | |
74 | { | |
75 | return _decoder; | |
76 | } | |
77 | ||
78 | const vector< shared_ptr<view::decode::Annotation> > | |
79 | Decoder::annotations() const | |
80 | { | |
81 | lock_guard<mutex> lock(_annotations_mutex); | |
82 | return _annotations; | |
83 | } | |
84 | ||
85 | void Decoder::begin_decode() | |
86 | { | |
87 | _decode_thread.interrupt(); | |
88 | _decode_thread.join(); | |
89 | ||
90 | if (_probes.empty()) | |
91 | return; | |
92 | ||
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::LogicSignal> sig = (*_probes.begin()).second; | |
97 | assert(sig); | |
98 | shared_ptr<data::Logic> data = sig->data(); | |
99 | ||
100 | _decode_thread = boost::thread(&Decoder::decode_proc, this, | |
101 | data); | |
102 | } | |
103 | ||
104 | void Decoder::clear_snapshots() | |
105 | { | |
106 | } | |
107 | ||
108 | bool Decoder::init_decoder() | |
109 | { | |
110 | if (!_probes.empty()) | |
111 | { | |
112 | shared_ptr<pv::view::LogicSignal> logic_signal = | |
113 | dynamic_pointer_cast<pv::view::LogicSignal>( | |
114 | (*_probes.begin()).second); | |
115 | if (logic_signal) { | |
116 | shared_ptr<pv::data::Logic> data( | |
117 | logic_signal->data()); | |
118 | if (data) { | |
119 | _samplerate = data->get_samplerate(); | |
120 | _start_time = data->get_start_time(); | |
121 | } | |
122 | } | |
123 | } | |
124 | ||
125 | srd_session_new(&_session); | |
126 | assert(_session); | |
127 | ||
128 | _decoder_inst = srd_inst_new(_session, _decoder->id, _options); | |
129 | if(!_decoder_inst) { | |
130 | qDebug() << "Failed to initialise decoder"; | |
131 | return false; | |
132 | } | |
133 | ||
134 | _decoder_inst->data_samplerate = _samplerate; | |
135 | ||
136 | GHashTable *probes = g_hash_table_new_full(g_str_hash, | |
137 | g_str_equal, g_free, (GDestroyNotify)g_variant_unref); | |
138 | ||
139 | for(map<const srd_probe*, shared_ptr<view::LogicSignal> >:: | |
140 | const_iterator i = _probes.begin(); | |
141 | i != _probes.end(); i++) | |
142 | { | |
143 | shared_ptr<view::Signal> signal((*i).second); | |
144 | GVariant *const gvar = g_variant_new_int32( | |
145 | signal->probe()->index); | |
146 | g_variant_ref_sink(gvar); | |
147 | g_hash_table_insert(probes, (*i).first->id, gvar); | |
148 | } | |
149 | ||
150 | srd_inst_probe_set_all(_decoder_inst, probes); | |
151 | ||
152 | return true; | |
153 | } | |
154 | ||
155 | void Decoder::decode_proc(shared_ptr<data::Logic> data) | |
156 | { | |
157 | uint8_t chunk[DecodeChunkLength]; | |
158 | ||
159 | assert(data); | |
160 | ||
161 | _annotations.clear(); | |
162 | ||
163 | const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots = | |
164 | data->get_snapshots(); | |
165 | if (snapshots.empty()) | |
166 | return; | |
167 | ||
168 | const shared_ptr<pv::data::LogicSnapshot> &snapshot = | |
169 | snapshots.front(); | |
170 | const int64_t sample_count = snapshot->get_sample_count() - 1; | |
171 | double samplerate = data->get_samplerate(); | |
172 | ||
173 | // Show sample rate as 1Hz when it is unknown | |
174 | if (samplerate == 0.0) | |
175 | samplerate = 1.0; | |
176 | ||
177 | srd_session_config_set(_session, SRD_CONF_NUM_PROBES, | |
178 | g_variant_new_uint64(_probes.size())); | |
179 | srd_session_config_set(_session, SRD_CONF_UNITSIZE, | |
180 | g_variant_new_uint64(snapshot->unit_size())); | |
181 | srd_session_config_set(_session, SRD_CONF_SAMPLERATE, | |
182 | g_variant_new_uint64((uint64_t)samplerate)); | |
183 | ||
184 | srd_session_start(_session); | |
185 | ||
186 | srd_pd_output_callback_add(_session, SRD_OUTPUT_ANN, | |
187 | Decoder::annotation_callback, this); | |
188 | ||
189 | for (int64_t i = 0; | |
190 | !this_thread::interruption_requested() && i < sample_count; | |
191 | i += DecodeChunkLength) | |
192 | { | |
193 | const int64_t chunk_end = min( | |
194 | i + DecodeChunkLength, sample_count); | |
195 | snapshot->get_samples(chunk, i, chunk_end); | |
196 | ||
197 | if (srd_session_send(_session, i, chunk, chunk_end - i) != | |
198 | SRD_OK) | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | void Decoder::annotation_callback(srd_proto_data *pdata, void *decoder) | |
204 | { | |
205 | using namespace pv::view::decode; | |
206 | ||
207 | assert(pdata); | |
208 | assert(decoder); | |
209 | ||
210 | Decoder *const d = (Decoder*)decoder; | |
211 | ||
212 | shared_ptr<Annotation> a(new Annotation(pdata)); | |
213 | lock_guard<mutex> lock(d->_annotations_mutex); | |
214 | d->_annotations.push_back(a); | |
215 | ||
216 | d->new_decode_data(); | |
217 | } | |
218 | ||
219 | } // namespace data | |
220 | } // namespace pv |