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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> |
22 | ||
e0fc5810 JH |
23 | #include <boost/thread/thread.hpp> |
24 | ||
e92cd4e4 JH |
25 | #include <stdexcept> |
26 | ||
b213ef09 JH |
27 | #include <QDebug> |
28 | ||
119aff65 JH |
29 | #include "decoder.h" |
30 | ||
e0fc5810 JH |
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> | |
708c5523 | 35 | |
e332f6d3 JH |
36 | using namespace boost; |
37 | using namespace std; | |
38 | ||
119aff65 JH |
39 | namespace pv { |
40 | namespace data { | |
41 | ||
e0fc5810 JH |
42 | const double Decoder::DecodeMargin = 1.0; |
43 | const double Decoder::DecodeThreshold = 0.2; | |
44 | const int64_t Decoder::DecodeChunkLength = 4096; | |
45 | ||
fe89c961 JH |
46 | mutex Decoder::_global_decode_mutex; |
47 | ||
708c5523 JH |
48 | Decoder::Decoder(const srd_decoder *const dec, |
49 | std::map<const srd_probe*, | |
3045c869 | 50 | boost::shared_ptr<pv::view::LogicSignal> > probes, |
67fe5e9c | 51 | GHashTable *options) : |
708c5523 | 52 | _decoder(dec), |
e332f6d3 | 53 | _probes(probes), |
b6b267bb | 54 | _options(options) |
119aff65 | 55 | { |
b6b267bb | 56 | init_decoder(); |
e92cd4e4 | 57 | |
e0fc5810 | 58 | begin_decode(); |
119aff65 JH |
59 | } |
60 | ||
640d69ce JH |
61 | Decoder::~Decoder() |
62 | { | |
63 | _decode_thread.interrupt(); | |
64 | _decode_thread.join(); | |
67fe5e9c JH |
65 | |
66 | g_hash_table_destroy(_options); | |
640d69ce JH |
67 | } |
68 | ||
119aff65 JH |
69 | const srd_decoder* Decoder::get_decoder() const |
70 | { | |
71 | return _decoder; | |
72 | } | |
73 | ||
e0fc5810 JH |
74 | const vector< shared_ptr<view::decode::Annotation> > |
75 | Decoder::annotations() const | |
76 | { | |
b6b267bb | 77 | lock_guard<mutex> lock(_mutex); |
e0fc5810 JH |
78 | return _annotations; |
79 | } | |
80 | ||
b6b267bb JH |
81 | QString Decoder::error_message() |
82 | { | |
83 | lock_guard<mutex> lock(_mutex); | |
84 | return _error_message; | |
85 | } | |
86 | ||
640d69ce JH |
87 | void Decoder::begin_decode() |
88 | { | |
89 | _decode_thread.interrupt(); | |
90 | _decode_thread.join(); | |
91 | ||
e0fc5810 JH |
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 | |
3045c869 | 98 | shared_ptr<pv::view::LogicSignal> sig = (*_probes.begin()).second; |
e0fc5810 | 99 | assert(sig); |
3045c869 | 100 | shared_ptr<data::Logic> data = sig->data(); |
e0fc5810 | 101 | |
640d69ce | 102 | _decode_thread = boost::thread(&Decoder::decode_proc, this, |
e0fc5810 | 103 | data); |
640d69ce JH |
104 | } |
105 | ||
106 | void Decoder::clear_snapshots() | |
107 | { | |
108 | } | |
109 | ||
b6b267bb | 110 | void Decoder::init_decoder() |
e332f6d3 | 111 | { |
e0fc5810 JH |
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) { | |
e0fc5810 | 121 | _start_time = data->get_start_time(); |
b6b267bb JH |
122 | _samplerate = data->get_samplerate(); |
123 | if (_samplerate == 0.0) | |
124 | _samplerate = 1.0; | |
e0fc5810 JH |
125 | } |
126 | } | |
127 | } | |
e332f6d3 JH |
128 | } |
129 | ||
640d69ce | 130 | void Decoder::decode_proc(shared_ptr<data::Logic> data) |
119aff65 | 131 | { |
b6b267bb | 132 | srd_session *session; |
e0fc5810 JH |
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; | |
e0fc5810 | 147 | |
b6b267bb JH |
148 | // Create the session |
149 | srd_session_new(&session); | |
150 | assert(session); | |
e0fc5810 | 151 | |
b6b267bb | 152 | srd_session_config_set(session, SRD_CONF_NUM_PROBES, |
9d20a741 | 153 | g_variant_new_uint64(_probes.size())); |
b6b267bb | 154 | srd_session_config_set(session, SRD_CONF_UNITSIZE, |
9d20a741 | 155 | g_variant_new_uint64(snapshot->unit_size())); |
b6b267bb JH |
156 | srd_session_config_set(session, SRD_CONF_SAMPLERATE, |
157 | g_variant_new_uint64((uint64_t)_samplerate)); | |
e0fc5810 | 158 | |
b6b267bb | 159 | srd_pd_output_callback_add(session, SRD_OUTPUT_ANN, |
e0fc5810 JH |
160 | Decoder::annotation_callback, this); |
161 | ||
b6b267bb JH |
162 | // Create the decoder instance |
163 | srd_decoder_inst *const decoder_inst = srd_inst_new( | |
164 | session, _decoder->id, _options); | |
165 | if(!decoder_inst) { | |
166 | _error_message = tr("Failed to initialise decoder"); | |
167 | return; | |
168 | } | |
169 | ||
170 | decoder_inst->data_samplerate = _samplerate; | |
171 | ||
172 | // Setup the probes | |
173 | GHashTable *const probes = g_hash_table_new_full(g_str_hash, | |
174 | g_str_equal, g_free, (GDestroyNotify)g_variant_unref); | |
175 | ||
176 | for(map<const srd_probe*, shared_ptr<view::LogicSignal> >:: | |
177 | const_iterator i = _probes.begin(); | |
178 | i != _probes.end(); i++) | |
179 | { | |
180 | shared_ptr<view::Signal> signal((*i).second); | |
181 | GVariant *const gvar = g_variant_new_int32( | |
182 | signal->probe()->index); | |
183 | g_variant_ref_sink(gvar); | |
184 | g_hash_table_insert(probes, (*i).first->id, gvar); | |
185 | } | |
186 | ||
187 | srd_inst_probe_set_all(decoder_inst, probes); | |
188 | ||
189 | // Start the session | |
190 | srd_session_start(session); | |
191 | ||
e0fc5810 JH |
192 | for (int64_t i = 0; |
193 | !this_thread::interruption_requested() && i < sample_count; | |
194 | i += DecodeChunkLength) | |
195 | { | |
fe89c961 JH |
196 | lock_guard<mutex> decode_lock(_global_decode_mutex); |
197 | ||
e0fc5810 JH |
198 | const int64_t chunk_end = min( |
199 | i + DecodeChunkLength, sample_count); | |
200 | snapshot->get_samples(chunk, i, chunk_end); | |
201 | ||
b6b267bb JH |
202 | if (srd_session_send(session, i, chunk, chunk_end - i) != |
203 | SRD_OK) { | |
204 | _error_message = tr("Failed to initialise decoder"); | |
e0fc5810 | 205 | break; |
b6b267bb | 206 | } |
e0fc5810 | 207 | } |
b6b267bb JH |
208 | |
209 | // Destroy the session | |
210 | srd_session_destroy(session); | |
e0fc5810 JH |
211 | } |
212 | ||
213 | void Decoder::annotation_callback(srd_proto_data *pdata, void *decoder) | |
214 | { | |
215 | using namespace pv::view::decode; | |
216 | ||
217 | assert(pdata); | |
218 | assert(decoder); | |
219 | ||
220 | Decoder *const d = (Decoder*)decoder; | |
221 | ||
222 | shared_ptr<Annotation> a(new Annotation(pdata)); | |
b6b267bb | 223 | lock_guard<mutex> lock(d->_mutex); |
e0fc5810 | 224 | d->_annotations.push_back(a); |
9cef9567 JH |
225 | |
226 | d->new_decode_data(); | |
119aff65 JH |
227 | } |
228 | ||
229 | } // namespace data | |
230 | } // namespace pv |