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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 <stdexcept> | |
24 | ||
25 | #include <QDebug> | |
26 | ||
27 | #include "decoderstack.hpp" | |
28 | ||
29 | #include <pv/data/logic.hpp> | |
30 | #include <pv/data/logicsegment.hpp> | |
31 | #include <pv/data/decode/decoder.hpp> | |
32 | #include <pv/data/decode/annotation.hpp> | |
33 | #include <pv/session.hpp> | |
34 | #include <pv/view/logicsignal.hpp> | |
35 | ||
36 | using std::lock_guard; | |
37 | using std::mutex; | |
38 | using boost::optional; | |
39 | using std::unique_lock; | |
40 | using std::deque; | |
41 | using std::make_pair; | |
42 | using std::max; | |
43 | using std::min; | |
44 | using std::list; | |
45 | using std::map; | |
46 | using std::pair; | |
47 | using std::shared_ptr; | |
48 | using std::vector; | |
49 | ||
50 | using namespace pv::data::decode; | |
51 | ||
52 | namespace pv { | |
53 | namespace data { | |
54 | ||
55 | const double DecoderStack::DecodeMargin = 1.0; | |
56 | const double DecoderStack::DecodeThreshold = 0.2; | |
57 | const int64_t DecoderStack::DecodeChunkLength = 4096; | |
58 | const unsigned int DecoderStack::DecodeNotifyPeriod = 65536; | |
59 | ||
60 | mutex DecoderStack::global_decode_mutex_; | |
61 | ||
62 | DecoderStack::DecoderStack(pv::Session &session, | |
63 | const srd_decoder *const dec) : | |
64 | session_(session), | |
65 | start_time_(0), | |
66 | samplerate_(0), | |
67 | sample_count_(0), | |
68 | frame_complete_(false), | |
69 | samples_decoded_(0) | |
70 | { | |
71 | connect(&session_, SIGNAL(frame_began()), | |
72 | this, SLOT(on_new_frame())); | |
73 | connect(&session_, SIGNAL(data_received()), | |
74 | this, SLOT(on_data_received())); | |
75 | connect(&session_, SIGNAL(frame_ended()), | |
76 | this, SLOT(on_frame_ended())); | |
77 | ||
78 | stack_.push_back(shared_ptr<decode::Decoder>( | |
79 | new decode::Decoder(dec))); | |
80 | } | |
81 | ||
82 | DecoderStack::~DecoderStack() | |
83 | { | |
84 | if (decode_thread_.joinable()) { | |
85 | interrupt_ = true; | |
86 | input_cond_.notify_one(); | |
87 | decode_thread_.join(); | |
88 | } | |
89 | } | |
90 | ||
91 | const std::list< std::shared_ptr<decode::Decoder> >& | |
92 | DecoderStack::stack() const | |
93 | { | |
94 | return stack_; | |
95 | } | |
96 | ||
97 | void DecoderStack::push(std::shared_ptr<decode::Decoder> decoder) | |
98 | { | |
99 | assert(decoder); | |
100 | stack_.push_back(decoder); | |
101 | } | |
102 | ||
103 | void DecoderStack::remove(int index) | |
104 | { | |
105 | assert(index >= 0); | |
106 | assert(index < (int)stack_.size()); | |
107 | ||
108 | // Find the decoder in the stack | |
109 | auto iter = stack_.begin(); | |
110 | for(int i = 0; i < index; i++, iter++) | |
111 | assert(iter != stack_.end()); | |
112 | ||
113 | // Delete the element | |
114 | stack_.erase(iter); | |
115 | } | |
116 | ||
117 | double DecoderStack::samplerate() const | |
118 | { | |
119 | return samplerate_; | |
120 | } | |
121 | ||
122 | double DecoderStack::start_time() const | |
123 | { | |
124 | return start_time_; | |
125 | } | |
126 | ||
127 | int64_t DecoderStack::samples_decoded() const | |
128 | { | |
129 | lock_guard<mutex> decode_lock(output_mutex_); | |
130 | return samples_decoded_; | |
131 | } | |
132 | ||
133 | std::vector<Row> DecoderStack::get_visible_rows() const | |
134 | { | |
135 | lock_guard<mutex> lock(output_mutex_); | |
136 | ||
137 | vector<Row> rows; | |
138 | ||
139 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
140 | { | |
141 | assert(dec); | |
142 | if (!dec->shown()) | |
143 | continue; | |
144 | ||
145 | const srd_decoder *const decc = dec->decoder(); | |
146 | assert(dec->decoder()); | |
147 | ||
148 | // Add a row for the decoder if it doesn't have a row list | |
149 | if (!decc->annotation_rows) | |
150 | rows.push_back(Row(decc)); | |
151 | ||
152 | // Add the decoder rows | |
153 | for (const GSList *l = decc->annotation_rows; l; l = l->next) | |
154 | { | |
155 | const srd_decoder_annotation_row *const ann_row = | |
156 | (srd_decoder_annotation_row *)l->data; | |
157 | assert(ann_row); | |
158 | rows.push_back(Row(decc, ann_row)); | |
159 | } | |
160 | } | |
161 | ||
162 | return rows; | |
163 | } | |
164 | ||
165 | void DecoderStack::get_annotation_subset( | |
166 | std::vector<pv::data::decode::Annotation> &dest, | |
167 | const Row &row, uint64_t start_sample, | |
168 | uint64_t end_sample) const | |
169 | { | |
170 | lock_guard<mutex> lock(output_mutex_); | |
171 | ||
172 | const auto iter = rows_.find(row); | |
173 | if (iter != rows_.end()) | |
174 | (*iter).second.get_annotation_subset(dest, | |
175 | start_sample, end_sample); | |
176 | } | |
177 | ||
178 | QString DecoderStack::error_message() | |
179 | { | |
180 | lock_guard<mutex> lock(output_mutex_); | |
181 | return error_message_; | |
182 | } | |
183 | ||
184 | void DecoderStack::clear() | |
185 | { | |
186 | sample_count_ = 0; | |
187 | frame_complete_ = false; | |
188 | samples_decoded_ = 0; | |
189 | error_message_ = QString(); | |
190 | rows_.clear(); | |
191 | class_rows_.clear(); | |
192 | } | |
193 | ||
194 | void DecoderStack::begin_decode() | |
195 | { | |
196 | shared_ptr<pv::view::LogicSignal> logic_signal; | |
197 | shared_ptr<pv::data::Logic> data; | |
198 | ||
199 | if (decode_thread_.joinable()) { | |
200 | interrupt_ = true; | |
201 | input_cond_.notify_one(); | |
202 | decode_thread_.join(); | |
203 | } | |
204 | ||
205 | clear(); | |
206 | ||
207 | // Check that all decoders have the required channels | |
208 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
209 | if (!dec->have_required_channels()) { | |
210 | error_message_ = tr("One or more required channels " | |
211 | "have not been specified"); | |
212 | return; | |
213 | } | |
214 | ||
215 | // Add classes | |
216 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
217 | { | |
218 | assert(dec); | |
219 | const srd_decoder *const decc = dec->decoder(); | |
220 | assert(dec->decoder()); | |
221 | ||
222 | // Add a row for the decoder if it doesn't have a row list | |
223 | if (!decc->annotation_rows) | |
224 | rows_[Row(decc)] = decode::RowData(); | |
225 | ||
226 | // Add the decoder rows | |
227 | for (const GSList *l = decc->annotation_rows; l; l = l->next) | |
228 | { | |
229 | const srd_decoder_annotation_row *const ann_row = | |
230 | (srd_decoder_annotation_row *)l->data; | |
231 | assert(ann_row); | |
232 | ||
233 | const Row row(decc, ann_row); | |
234 | ||
235 | // Add a new empty row data object | |
236 | rows_[row] = decode::RowData(); | |
237 | ||
238 | // Map out all the classes | |
239 | for (const GSList *ll = ann_row->ann_classes; | |
240 | ll; ll = ll->next) | |
241 | class_rows_[make_pair(decc, | |
242 | GPOINTER_TO_INT(ll->data))] = row; | |
243 | } | |
244 | } | |
245 | ||
246 | // We get the logic data of the first channel in the list. | |
247 | // This works because we are currently assuming all | |
248 | // LogicSignals have the same data/segment | |
249 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
250 | if (dec && !dec->channels().empty() && | |
251 | ((logic_signal = (*dec->channels().begin()).second)) && | |
252 | ((data = logic_signal->logic_data()))) | |
253 | break; | |
254 | ||
255 | if (!data) | |
256 | return; | |
257 | ||
258 | // Check we have a segment of data | |
259 | const deque< shared_ptr<pv::data::LogicSegment> > &segments = | |
260 | data->logic_segments(); | |
261 | if (segments.empty()) | |
262 | return; | |
263 | segment_ = segments.front(); | |
264 | ||
265 | // Get the samplerate and start time | |
266 | start_time_ = segment_->start_time(); | |
267 | samplerate_ = segment_->samplerate(); | |
268 | if (samplerate_ == 0.0) | |
269 | samplerate_ = 1.0; | |
270 | ||
271 | interrupt_ = false; | |
272 | decode_thread_ = std::thread(&DecoderStack::decode_proc, this); | |
273 | } | |
274 | ||
275 | uint64_t DecoderStack::get_max_sample_count() const | |
276 | { | |
277 | uint64_t max_sample_count = 0; | |
278 | ||
279 | for (auto i = rows_.cbegin(); i != rows_.end(); i++) | |
280 | max_sample_count = max(max_sample_count, | |
281 | (*i).second.get_max_sample()); | |
282 | ||
283 | return max_sample_count; | |
284 | } | |
285 | ||
286 | optional<int64_t> DecoderStack::wait_for_data() const | |
287 | { | |
288 | unique_lock<mutex> input_lock(input_mutex_); | |
289 | while(!interrupt_ && !frame_complete_ && | |
290 | samples_decoded_ >= sample_count_) | |
291 | input_cond_.wait(input_lock); | |
292 | return boost::make_optional(!interrupt_ && | |
293 | (samples_decoded_ < sample_count_ || !frame_complete_), | |
294 | sample_count_); | |
295 | } | |
296 | ||
297 | void DecoderStack::decode_data( | |
298 | const int64_t sample_count, const unsigned int unit_size, | |
299 | srd_session *const session) | |
300 | { | |
301 | uint8_t chunk[DecodeChunkLength]; | |
302 | ||
303 | const unsigned int chunk_sample_count = | |
304 | DecodeChunkLength / segment_->unit_size(); | |
305 | ||
306 | for (int64_t i = 0; !interrupt_ && i < sample_count; | |
307 | i += chunk_sample_count) | |
308 | { | |
309 | lock_guard<mutex> decode_lock(global_decode_mutex_); | |
310 | ||
311 | const int64_t chunk_end = min( | |
312 | i + chunk_sample_count, sample_count); | |
313 | segment_->get_samples(chunk, i, chunk_end); | |
314 | ||
315 | if (srd_session_send(session, i, i + sample_count, chunk, | |
316 | (chunk_end - i) * unit_size) != SRD_OK) { | |
317 | error_message_ = tr("Decoder reported an error"); | |
318 | break; | |
319 | } | |
320 | ||
321 | { | |
322 | lock_guard<mutex> lock(output_mutex_); | |
323 | samples_decoded_ = chunk_end; | |
324 | } | |
325 | ||
326 | if (i % DecodeNotifyPeriod == 0) | |
327 | new_decode_data(); | |
328 | } | |
329 | ||
330 | new_decode_data(); | |
331 | } | |
332 | ||
333 | void DecoderStack::decode_proc() | |
334 | { | |
335 | optional<int64_t> sample_count; | |
336 | srd_session *session; | |
337 | srd_decoder_inst *prev_di = NULL; | |
338 | ||
339 | assert(segment_); | |
340 | ||
341 | // Create the session | |
342 | srd_session_new(&session); | |
343 | assert(session); | |
344 | ||
345 | // Create the decoders | |
346 | const unsigned int unit_size = segment_->unit_size(); | |
347 | ||
348 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
349 | { | |
350 | srd_decoder_inst *const di = dec->create_decoder_inst(session, unit_size); | |
351 | ||
352 | if (!di) | |
353 | { | |
354 | error_message_ = tr("Failed to create decoder instance"); | |
355 | srd_session_destroy(session); | |
356 | return; | |
357 | } | |
358 | ||
359 | if (prev_di) | |
360 | srd_inst_stack (session, prev_di, di); | |
361 | ||
362 | prev_di = di; | |
363 | } | |
364 | ||
365 | // Get the intial sample count | |
366 | { | |
367 | unique_lock<mutex> input_lock(input_mutex_); | |
368 | sample_count = sample_count_ = segment_->get_sample_count(); | |
369 | } | |
370 | ||
371 | // Start the session | |
372 | srd_session_metadata_set(session, SRD_CONF_SAMPLERATE, | |
373 | g_variant_new_uint64((uint64_t)samplerate_)); | |
374 | ||
375 | srd_pd_output_callback_add(session, SRD_OUTPUT_ANN, | |
376 | DecoderStack::annotation_callback, this); | |
377 | ||
378 | srd_session_start(session); | |
379 | ||
380 | do { | |
381 | decode_data(*sample_count, unit_size, session); | |
382 | } while(error_message_.isEmpty() && (sample_count = wait_for_data())); | |
383 | ||
384 | // Destroy the session | |
385 | srd_session_destroy(session); | |
386 | } | |
387 | ||
388 | void DecoderStack::annotation_callback(srd_proto_data *pdata, void *decoder) | |
389 | { | |
390 | assert(pdata); | |
391 | assert(decoder); | |
392 | ||
393 | DecoderStack *const d = (DecoderStack*)decoder; | |
394 | assert(d); | |
395 | ||
396 | lock_guard<mutex> lock(d->output_mutex_); | |
397 | ||
398 | const Annotation a(pdata); | |
399 | ||
400 | // Find the row | |
401 | assert(pdata->pdo); | |
402 | assert(pdata->pdo->di); | |
403 | const srd_decoder *const decc = pdata->pdo->di->decoder; | |
404 | assert(decc); | |
405 | ||
406 | auto row_iter = d->rows_.end(); | |
407 | ||
408 | // Try looking up the sub-row of this class | |
409 | const auto r = d->class_rows_.find(make_pair(decc, a.format())); | |
410 | if (r != d->class_rows_.end()) | |
411 | row_iter = d->rows_.find((*r).second); | |
412 | else | |
413 | { | |
414 | // Failing that, use the decoder as a key | |
415 | row_iter = d->rows_.find(Row(decc)); | |
416 | } | |
417 | ||
418 | assert(row_iter != d->rows_.end()); | |
419 | if (row_iter == d->rows_.end()) { | |
420 | qDebug() << "Unexpected annotation: decoder = " << decc << | |
421 | ", format = " << a.format(); | |
422 | assert(0); | |
423 | return; | |
424 | } | |
425 | ||
426 | // Add the annotation | |
427 | (*row_iter).second.push_annotation(a); | |
428 | } | |
429 | ||
430 | void DecoderStack::on_new_frame() | |
431 | { | |
432 | begin_decode(); | |
433 | } | |
434 | ||
435 | void DecoderStack::on_data_received() | |
436 | { | |
437 | { | |
438 | unique_lock<mutex> lock(input_mutex_); | |
439 | if (segment_) | |
440 | sample_count_ = segment_->get_sample_count(); | |
441 | } | |
442 | input_cond_.notify_one(); | |
443 | } | |
444 | ||
445 | void DecoderStack::on_frame_ended() | |
446 | { | |
447 | { | |
448 | unique_lock<mutex> lock(input_mutex_); | |
449 | if (segment_) | |
450 | frame_complete_ = true; | |
451 | } | |
452 | input_cond_.notify_one(); | |
453 | } | |
454 | ||
455 | } // namespace data | |
456 | } // namespace pv |