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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/foreach.hpp> | |
24 | #include <boost/thread/thread.hpp> | |
25 | ||
26 | #include <stdexcept> | |
27 | ||
28 | #include <QDebug> | |
29 | ||
30 | #include "decoderstack.h" | |
31 | ||
32 | #include <pv/data/logic.h> | |
33 | #include <pv/data/logicsnapshot.h> | |
34 | #include <pv/data/decode/decoder.h> | |
35 | #include <pv/data/decode/annotation.h> | |
36 | #include <pv/view/logicsignal.h> | |
37 | ||
38 | using boost::lock_guard; | |
39 | using boost::mutex; | |
40 | using boost::shared_ptr; | |
41 | using std::deque; | |
42 | using std::min; | |
43 | using std::list; | |
44 | using std::vector; | |
45 | ||
46 | namespace pv { | |
47 | namespace data { | |
48 | ||
49 | const double DecoderStack::DecodeMargin = 1.0; | |
50 | const double DecoderStack::DecodeThreshold = 0.2; | |
51 | const int64_t DecoderStack::DecodeChunkLength = 4096; | |
52 | ||
53 | mutex DecoderStack::_global_decode_mutex; | |
54 | ||
55 | DecoderStack::DecoderStack(const srd_decoder *const dec) : | |
56 | _samples_decoded(0) | |
57 | { | |
58 | _stack.push_back(shared_ptr<decode::Decoder>( | |
59 | new decode::Decoder(dec))); | |
60 | } | |
61 | ||
62 | DecoderStack::~DecoderStack() | |
63 | { | |
64 | _decode_thread.interrupt(); | |
65 | _decode_thread.join(); | |
66 | } | |
67 | ||
68 | const std::list< boost::shared_ptr<decode::Decoder> >& | |
69 | DecoderStack::stack() const | |
70 | { | |
71 | return _stack; | |
72 | } | |
73 | ||
74 | void DecoderStack::push(boost::shared_ptr<decode::Decoder> decoder) | |
75 | { | |
76 | assert(decoder); | |
77 | _stack.push_back(decoder); | |
78 | } | |
79 | ||
80 | void DecoderStack::remove(int index) | |
81 | { | |
82 | using pv::data::decode::Decoder; | |
83 | ||
84 | assert(index >= 0); | |
85 | assert(index < (int)_stack.size()); | |
86 | ||
87 | // Find the decoder in the stack | |
88 | list< shared_ptr<Decoder> >::iterator iter = _stack.begin(); | |
89 | for(int i = 0; i < index; i++, iter++) | |
90 | assert(iter != _stack.end()); | |
91 | ||
92 | // Delete the element | |
93 | _stack.erase(iter); | |
94 | } | |
95 | ||
96 | int64_t DecoderStack::samples_decoded() const | |
97 | { | |
98 | lock_guard<mutex> decode_lock(_mutex); | |
99 | return _samples_decoded; | |
100 | } | |
101 | ||
102 | const vector<decode::Annotation> DecoderStack::annotations() const | |
103 | { | |
104 | lock_guard<mutex> lock(_mutex); | |
105 | return _annotations; | |
106 | } | |
107 | ||
108 | QString DecoderStack::error_message() | |
109 | { | |
110 | lock_guard<mutex> lock(_mutex); | |
111 | return _error_message; | |
112 | } | |
113 | ||
114 | void DecoderStack::begin_decode() | |
115 | { | |
116 | shared_ptr<pv::view::LogicSignal> logic_signal; | |
117 | shared_ptr<pv::data::Logic> data; | |
118 | ||
119 | _decode_thread.interrupt(); | |
120 | _decode_thread.join(); | |
121 | ||
122 | _samples_decoded = 0; | |
123 | ||
124 | _annotations.clear(); | |
125 | ||
126 | // We get the logic data of the first probe in the list. | |
127 | // This works because we are currently assuming all | |
128 | // LogicSignals have the same data/snapshot | |
129 | BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack) | |
130 | if (dec && !dec->probes().empty() && | |
131 | ((logic_signal = (*dec->probes().begin()).second)) && | |
132 | ((data = logic_signal->logic_data()))) | |
133 | break; | |
134 | ||
135 | if (!data) | |
136 | return; | |
137 | ||
138 | // Get the samplerate and start time | |
139 | _start_time = data->get_start_time(); | |
140 | _samplerate = data->samplerate(); | |
141 | if (_samplerate == 0.0) | |
142 | _samplerate = 1.0; | |
143 | ||
144 | _decode_thread = boost::thread(&DecoderStack::decode_proc, this, | |
145 | data); | |
146 | } | |
147 | ||
148 | void DecoderStack::clear() | |
149 | { | |
150 | _annotations.clear(); | |
151 | } | |
152 | ||
153 | uint64_t DecoderStack::get_max_sample_count() const | |
154 | { | |
155 | if (_annotations.empty()) | |
156 | return 0; | |
157 | return _annotations.back().end_sample(); | |
158 | } | |
159 | ||
160 | void DecoderStack::decode_proc(shared_ptr<data::Logic> data) | |
161 | { | |
162 | srd_session *session; | |
163 | uint8_t chunk[DecodeChunkLength]; | |
164 | srd_decoder_inst *prev_di = NULL; | |
165 | ||
166 | assert(data); | |
167 | ||
168 | const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots = | |
169 | data->get_snapshots(); | |
170 | if (snapshots.empty()) | |
171 | return; | |
172 | ||
173 | const shared_ptr<pv::data::LogicSnapshot> &snapshot = | |
174 | snapshots.front(); | |
175 | const int64_t sample_count = snapshot->get_sample_count() - 1; | |
176 | const unsigned int chunk_sample_count = | |
177 | DecodeChunkLength / snapshot->unit_size(); | |
178 | ||
179 | // Create the session | |
180 | srd_session_new(&session); | |
181 | assert(session); | |
182 | ||
183 | // Create the decoders | |
184 | BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack) | |
185 | { | |
186 | srd_decoder_inst *const di = dec->create_decoder_inst(session); | |
187 | ||
188 | if (!di) | |
189 | { | |
190 | _error_message = tr("Failed to initialise decoder"); | |
191 | srd_session_destroy(session); | |
192 | return; | |
193 | } | |
194 | ||
195 | if (prev_di) | |
196 | srd_inst_stack (session, prev_di, di); | |
197 | ||
198 | prev_di = di; | |
199 | } | |
200 | ||
201 | // Start the session | |
202 | srd_session_metadata_set(session, SRD_CONF_SAMPLERATE, | |
203 | g_variant_new_uint64((uint64_t)_samplerate)); | |
204 | ||
205 | srd_pd_output_callback_add(session, SRD_OUTPUT_ANN, | |
206 | DecoderStack::annotation_callback, this); | |
207 | ||
208 | srd_session_start(session); | |
209 | ||
210 | for (int64_t i = 0; | |
211 | !boost::this_thread::interruption_requested() && | |
212 | i < sample_count; | |
213 | i += chunk_sample_count) | |
214 | { | |
215 | lock_guard<mutex> decode_lock(_global_decode_mutex); | |
216 | ||
217 | const int64_t chunk_end = min( | |
218 | i + chunk_sample_count, sample_count); | |
219 | snapshot->get_samples(chunk, i, chunk_end); | |
220 | ||
221 | if (srd_session_send(session, i, i + sample_count, | |
222 | chunk, chunk_end - i) != SRD_OK) { | |
223 | _error_message = tr("Failed to initialise decoder"); | |
224 | break; | |
225 | } | |
226 | ||
227 | { | |
228 | lock_guard<mutex> lock(_mutex); | |
229 | _samples_decoded = chunk_end; | |
230 | } | |
231 | } | |
232 | ||
233 | // Destroy the session | |
234 | srd_session_destroy(session); | |
235 | } | |
236 | ||
237 | void DecoderStack::annotation_callback(srd_proto_data *pdata, void *decoder) | |
238 | { | |
239 | using pv::data::decode::Annotation; | |
240 | ||
241 | assert(pdata); | |
242 | assert(decoder); | |
243 | ||
244 | DecoderStack *const d = (DecoderStack*)decoder; | |
245 | ||
246 | lock_guard<mutex> lock(d->_mutex); | |
247 | d->_annotations.push_back(Annotation(pdata)); | |
248 | ||
249 | d->new_decode_data(); | |
250 | } | |
251 | ||
252 | } // namespace data | |
253 | } // namespace pv |