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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 | mutex Decoder::_global_decode_mutex; | |
47 | ||
48 | Decoder::Decoder(const srd_decoder *const dec, | |
49 | std::map<const srd_probe*, | |
50 | boost::shared_ptr<pv::view::LogicSignal> > probes, | |
51 | GHashTable *options) : | |
52 | _decoder(dec), | |
53 | _probes(probes), | |
54 | _options(options) | |
55 | { | |
56 | init_decoder(); | |
57 | ||
58 | begin_decode(); | |
59 | } | |
60 | ||
61 | Decoder::~Decoder() | |
62 | { | |
63 | _decode_thread.interrupt(); | |
64 | _decode_thread.join(); | |
65 | ||
66 | g_hash_table_destroy(_options); | |
67 | } | |
68 | ||
69 | const srd_decoder* Decoder::get_decoder() const | |
70 | { | |
71 | return _decoder; | |
72 | } | |
73 | ||
74 | const vector< shared_ptr<view::decode::Annotation> > | |
75 | Decoder::annotations() const | |
76 | { | |
77 | lock_guard<mutex> lock(_mutex); | |
78 | return _annotations; | |
79 | } | |
80 | ||
81 | QString Decoder::error_message() | |
82 | { | |
83 | lock_guard<mutex> lock(_mutex); | |
84 | return _error_message; | |
85 | } | |
86 | ||
87 | void Decoder::begin_decode() | |
88 | { | |
89 | _decode_thread.interrupt(); | |
90 | _decode_thread.join(); | |
91 | ||
92 | if (_probes.empty()) | |
93 | return; | |
94 | ||
95 | // We get the logic data of the first probe in the list. | |
96 | // This works because we are currently assuming all | |
97 | // LogicSignals have the same data/snapshot | |
98 | shared_ptr<pv::view::LogicSignal> sig = (*_probes.begin()).second; | |
99 | assert(sig); | |
100 | shared_ptr<data::Logic> data = sig->data(); | |
101 | ||
102 | _decode_thread = boost::thread(&Decoder::decode_proc, this, | |
103 | data); | |
104 | } | |
105 | ||
106 | void Decoder::clear_snapshots() | |
107 | { | |
108 | } | |
109 | ||
110 | void Decoder::init_decoder() | |
111 | { | |
112 | if (!_probes.empty()) | |
113 | { | |
114 | shared_ptr<pv::view::LogicSignal> logic_signal = | |
115 | dynamic_pointer_cast<pv::view::LogicSignal>( | |
116 | (*_probes.begin()).second); | |
117 | if (logic_signal) { | |
118 | shared_ptr<pv::data::Logic> data( | |
119 | logic_signal->data()); | |
120 | if (data) { | |
121 | _start_time = data->get_start_time(); | |
122 | _samplerate = data->get_samplerate(); | |
123 | if (_samplerate == 0.0) | |
124 | _samplerate = 1.0; | |
125 | } | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
130 | void Decoder::decode_proc(shared_ptr<data::Logic> data) | |
131 | { | |
132 | srd_session *session; | |
133 | uint8_t chunk[DecodeChunkLength]; | |
134 | ||
135 | assert(data); | |
136 | ||
137 | _annotations.clear(); | |
138 | ||
139 | const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots = | |
140 | data->get_snapshots(); | |
141 | if (snapshots.empty()) | |
142 | return; | |
143 | ||
144 | const shared_ptr<pv::data::LogicSnapshot> &snapshot = | |
145 | snapshots.front(); | |
146 | const int64_t sample_count = snapshot->get_sample_count() - 1; | |
147 | ||
148 | // Create the session | |
149 | srd_session_new(&session); | |
150 | assert(session); | |
151 | ||
152 | srd_session_metadata_set(session, SRD_CONF_SAMPLERATE, | |
153 | g_variant_new_uint64((uint64_t)_samplerate)); | |
154 | ||
155 | srd_pd_output_callback_add(session, SRD_OUTPUT_ANN, | |
156 | Decoder::annotation_callback, this); | |
157 | ||
158 | // Create the decoder instance | |
159 | srd_decoder_inst *const decoder_inst = srd_inst_new( | |
160 | session, _decoder->id, _options); | |
161 | if(!decoder_inst) { | |
162 | _error_message = tr("Failed to initialise decoder"); | |
163 | return; | |
164 | } | |
165 | ||
166 | // Setup the probes | |
167 | GHashTable *const probes = g_hash_table_new_full(g_str_hash, | |
168 | g_str_equal, g_free, (GDestroyNotify)g_variant_unref); | |
169 | ||
170 | for(map<const srd_probe*, shared_ptr<view::LogicSignal> >:: | |
171 | const_iterator i = _probes.begin(); | |
172 | i != _probes.end(); i++) | |
173 | { | |
174 | shared_ptr<view::Signal> signal((*i).second); | |
175 | GVariant *const gvar = g_variant_new_int32( | |
176 | signal->probe()->index); | |
177 | g_variant_ref_sink(gvar); | |
178 | g_hash_table_insert(probes, (*i).first->id, gvar); | |
179 | } | |
180 | ||
181 | srd_inst_probe_set_all(decoder_inst, probes); | |
182 | ||
183 | // Start the session | |
184 | srd_session_start(session); | |
185 | ||
186 | for (int64_t i = 0; | |
187 | !this_thread::interruption_requested() && i < sample_count; | |
188 | i += DecodeChunkLength) | |
189 | { | |
190 | lock_guard<mutex> decode_lock(_global_decode_mutex); | |
191 | ||
192 | const int64_t chunk_end = min( | |
193 | i + DecodeChunkLength, sample_count); | |
194 | snapshot->get_samples(chunk, i, chunk_end); | |
195 | ||
196 | if (srd_session_send(session, i, i + sample_count, | |
197 | chunk, chunk_end - i) != SRD_OK) { | |
198 | _error_message = tr("Failed to initialise decoder"); | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | // Destroy the session | |
204 | srd_session_destroy(session); | |
205 | } | |
206 | ||
207 | void Decoder::annotation_callback(srd_proto_data *pdata, void *decoder) | |
208 | { | |
209 | using namespace pv::view::decode; | |
210 | ||
211 | assert(pdata); | |
212 | assert(decoder); | |
213 | ||
214 | Decoder *const d = (Decoder*)decoder; | |
215 | ||
216 | shared_ptr<Annotation> a(new Annotation(pdata)); | |
217 | lock_guard<mutex> lock(d->_mutex); | |
218 | d->_annotations.push_back(a); | |
219 | ||
220 | d->new_decode_data(); | |
221 | } | |
222 | ||
223 | } // namespace data | |
224 | } // namespace pv |