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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net> | |
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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <limits> | |
21 | ||
22 | #include <QDebug> | |
23 | ||
24 | #include "logic.hpp" | |
25 | #include "logicsegment.hpp" | |
26 | #include "decodesignal.hpp" | |
27 | #include "signaldata.hpp" | |
28 | ||
29 | #include <pv/binding/decoder.hpp> | |
30 | #include <pv/data/decode/decoder.hpp> | |
31 | #include <pv/data/decode/row.hpp> | |
32 | #include <pv/session.hpp> | |
33 | ||
34 | using std::lock_guard; | |
35 | using std::make_pair; | |
36 | using std::make_shared; | |
37 | using std::min; | |
38 | using std::shared_ptr; | |
39 | using std::unique_lock; | |
40 | using pv::data::decode::Annotation; | |
41 | using pv::data::decode::Decoder; | |
42 | using pv::data::decode::Row; | |
43 | ||
44 | namespace pv { | |
45 | namespace data { | |
46 | ||
47 | const double DecodeSignal::DecodeMargin = 1.0; | |
48 | const double DecodeSignal::DecodeThreshold = 0.2; | |
49 | const int64_t DecodeSignal::DecodeChunkLength = 10 * 1024 * 1024; | |
50 | const unsigned int DecodeSignal::DecodeNotifyPeriod = 1024; | |
51 | ||
52 | mutex DecodeSignal::global_srd_mutex_; | |
53 | ||
54 | ||
55 | DecodeSignal::DecodeSignal(pv::Session &session) : | |
56 | SignalBase(nullptr, SignalBase::DecodeChannel), | |
57 | session_(session), | |
58 | srd_session_(nullptr), | |
59 | logic_mux_data_invalid_(false), | |
60 | start_time_(0), | |
61 | samplerate_(0), | |
62 | annotation_count_(0), | |
63 | samples_decoded_(0), | |
64 | frame_complete_(false) | |
65 | { | |
66 | connect(&session_, SIGNAL(capture_state_changed(int)), | |
67 | this, SLOT(on_capture_state_changed(int))); | |
68 | ||
69 | set_name(tr("Empty decoder signal")); | |
70 | } | |
71 | ||
72 | DecodeSignal::~DecodeSignal() | |
73 | { | |
74 | if (decode_thread_.joinable()) { | |
75 | decode_interrupt_ = true; | |
76 | decode_input_cond_.notify_one(); | |
77 | decode_thread_.join(); | |
78 | } | |
79 | ||
80 | if (logic_mux_thread_.joinable()) { | |
81 | logic_mux_interrupt_ = true; | |
82 | logic_mux_cond_.notify_one(); | |
83 | logic_mux_thread_.join(); | |
84 | } | |
85 | ||
86 | stop_srd_session(); | |
87 | } | |
88 | ||
89 | const vector< shared_ptr<Decoder> >& DecodeSignal::decoder_stack() const | |
90 | { | |
91 | return stack_; | |
92 | } | |
93 | ||
94 | void DecodeSignal::stack_decoder(srd_decoder *decoder) | |
95 | { | |
96 | assert(decoder); | |
97 | stack_.push_back(make_shared<decode::Decoder>(decoder)); | |
98 | ||
99 | // Set name if this decoder is the first in the list | |
100 | if (stack_.size() == 1) | |
101 | set_name(QString::fromUtf8(decoder->name)); | |
102 | ||
103 | // Include the newly created decode channels in the channel lists | |
104 | update_channel_list(); | |
105 | ||
106 | auto_assign_signals(); | |
107 | commit_decoder_channels(); | |
108 | begin_decode(); | |
109 | } | |
110 | ||
111 | void DecodeSignal::remove_decoder(int index) | |
112 | { | |
113 | assert(index >= 0); | |
114 | assert(index < (int)stack_.size()); | |
115 | ||
116 | // Find the decoder in the stack | |
117 | auto iter = stack_.begin(); | |
118 | for (int i = 0; i < index; i++, iter++) | |
119 | assert(iter != stack_.end()); | |
120 | ||
121 | // Delete the element | |
122 | stack_.erase(iter); | |
123 | ||
124 | // Update channels and decoded data | |
125 | update_channel_list(); | |
126 | begin_decode(); | |
127 | } | |
128 | ||
129 | bool DecodeSignal::toggle_decoder_visibility(int index) | |
130 | { | |
131 | auto iter = stack_.cbegin(); | |
132 | for (int i = 0; i < index; i++, iter++) | |
133 | assert(iter != stack_.end()); | |
134 | ||
135 | shared_ptr<Decoder> dec = *iter; | |
136 | ||
137 | // Toggle decoder visibility | |
138 | bool state = false; | |
139 | if (dec) { | |
140 | state = !dec->shown(); | |
141 | dec->show(state); | |
142 | } | |
143 | ||
144 | return state; | |
145 | } | |
146 | ||
147 | void DecodeSignal::reset_decode() | |
148 | { | |
149 | stop_srd_session(); | |
150 | ||
151 | annotation_count_ = 0; | |
152 | frame_complete_ = false; | |
153 | samples_decoded_ = 0; | |
154 | error_message_ = QString(); | |
155 | rows_.clear(); | |
156 | class_rows_.clear(); | |
157 | } | |
158 | ||
159 | void DecodeSignal::begin_decode() | |
160 | { | |
161 | if (decode_thread_.joinable()) { | |
162 | decode_interrupt_ = true; | |
163 | decode_input_cond_.notify_one(); | |
164 | decode_thread_.join(); | |
165 | } | |
166 | ||
167 | if (logic_mux_thread_.joinable()) { | |
168 | logic_mux_interrupt_ = true; | |
169 | logic_mux_cond_.notify_one(); | |
170 | logic_mux_thread_.join(); | |
171 | } | |
172 | ||
173 | reset_decode(); | |
174 | ||
175 | if (stack_.size() == 0) { | |
176 | error_message_ = tr("No decoders"); | |
177 | return; | |
178 | } | |
179 | ||
180 | assert(channels_.size() > 0); | |
181 | ||
182 | if (get_assigned_signal_count() == 0) { | |
183 | error_message_ = tr("There are no channels assigned to this decoder"); | |
184 | return; | |
185 | } | |
186 | ||
187 | // Check that all decoders have the required channels | |
188 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
189 | if (!dec->have_required_channels()) { | |
190 | error_message_ = tr("One or more required channels " | |
191 | "have not been specified"); | |
192 | return; | |
193 | } | |
194 | ||
195 | // Add annotation classes | |
196 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
197 | assert(dec); | |
198 | const srd_decoder *const decc = dec->decoder(); | |
199 | assert(dec->decoder()); | |
200 | ||
201 | // Add a row for the decoder if it doesn't have a row list | |
202 | if (!decc->annotation_rows) | |
203 | rows_[Row(decc)] = decode::RowData(); | |
204 | ||
205 | // Add the decoder rows | |
206 | for (const GSList *l = decc->annotation_rows; l; l = l->next) { | |
207 | const srd_decoder_annotation_row *const ann_row = | |
208 | (srd_decoder_annotation_row *)l->data; | |
209 | assert(ann_row); | |
210 | ||
211 | const Row row(decc, ann_row); | |
212 | ||
213 | // Add a new empty row data object | |
214 | rows_[row] = decode::RowData(); | |
215 | ||
216 | // Map out all the classes | |
217 | for (const GSList *ll = ann_row->ann_classes; | |
218 | ll; ll = ll->next) | |
219 | class_rows_[make_pair(decc, | |
220 | GPOINTER_TO_INT(ll->data))] = row; | |
221 | } | |
222 | } | |
223 | ||
224 | // Free the logic data and its segment(s) if it needs to be updated | |
225 | if (logic_mux_data_invalid_) | |
226 | logic_mux_data_.reset(); | |
227 | ||
228 | if (!logic_mux_data_) { | |
229 | const int64_t ch_count = get_assigned_signal_count(); | |
230 | const int64_t unit_size = (ch_count + 7) / 8; | |
231 | logic_mux_data_ = make_shared<Logic>(ch_count); | |
232 | segment_ = make_shared<LogicSegment>(*logic_mux_data_, unit_size, samplerate_); | |
233 | logic_mux_data_->push_segment(segment_); | |
234 | } | |
235 | ||
236 | // Make sure the logic output data is complete and up-to-date | |
237 | logic_mux_interrupt_ = false; | |
238 | logic_mux_thread_ = std::thread(&DecodeSignal::logic_mux_proc, this); | |
239 | ||
240 | // Decode the muxed logic data | |
241 | decode_interrupt_ = false; | |
242 | decode_thread_ = std::thread(&DecodeSignal::decode_proc, this); | |
243 | ||
244 | // Receive notifications when new sample data is available | |
245 | connect_input_notifiers(); | |
246 | } | |
247 | ||
248 | QString DecodeSignal::error_message() const | |
249 | { | |
250 | lock_guard<mutex> lock(output_mutex_); | |
251 | return error_message_; | |
252 | } | |
253 | ||
254 | const vector<data::DecodeChannel> DecodeSignal::get_channels() const | |
255 | { | |
256 | return channels_; | |
257 | } | |
258 | ||
259 | void DecodeSignal::auto_assign_signals() | |
260 | { | |
261 | bool new_assignment = false; | |
262 | ||
263 | // Try to auto-select channels that don't have signals assigned yet | |
264 | for (data::DecodeChannel &ch : channels_) { | |
265 | if (ch.assigned_signal) | |
266 | continue; | |
267 | ||
268 | for (shared_ptr<data::SignalBase> s : session_.signalbases()) | |
269 | if (s->logic_data() && (ch.name.toLower().contains(s->name().toLower()))) { | |
270 | ch.assigned_signal = s.get(); | |
271 | new_assignment = true; | |
272 | } | |
273 | } | |
274 | ||
275 | if (new_assignment) { | |
276 | logic_mux_data_invalid_ = true; | |
277 | commit_decoder_channels(); | |
278 | channels_updated(); | |
279 | } | |
280 | } | |
281 | ||
282 | void DecodeSignal::assign_signal(const uint16_t channel_id, const SignalBase *signal) | |
283 | { | |
284 | for (data::DecodeChannel &ch : channels_) | |
285 | if (ch.id == channel_id) { | |
286 | ch.assigned_signal = signal; | |
287 | logic_mux_data_invalid_ = true; | |
288 | } | |
289 | ||
290 | commit_decoder_channels(); | |
291 | channels_updated(); | |
292 | begin_decode(); | |
293 | } | |
294 | ||
295 | int DecodeSignal::get_assigned_signal_count() const | |
296 | { | |
297 | // Count all channels that have a signal assigned to them | |
298 | return count_if(channels_.begin(), channels_.end(), | |
299 | [](data::DecodeChannel ch) { return ch.assigned_signal; }); | |
300 | } | |
301 | ||
302 | void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state) | |
303 | { | |
304 | for (data::DecodeChannel &ch : channels_) | |
305 | if (ch.id == channel_id) | |
306 | ch.initial_pin_state = init_state; | |
307 | ||
308 | channels_updated(); | |
309 | ||
310 | begin_decode(); | |
311 | } | |
312 | ||
313 | double DecodeSignal::samplerate() const | |
314 | { | |
315 | return samplerate_; | |
316 | } | |
317 | ||
318 | const pv::util::Timestamp& DecodeSignal::start_time() const | |
319 | { | |
320 | return start_time_; | |
321 | } | |
322 | ||
323 | int64_t DecodeSignal::get_working_sample_count() const | |
324 | { | |
325 | // The working sample count is the highest sample number for | |
326 | // which all used signals have data available, so go through | |
327 | // all channels and use the lowest overall sample count of the | |
328 | // current segment | |
329 | ||
330 | // TODO Currently, we assume only a single segment exists | |
331 | ||
332 | int64_t count = std::numeric_limits<int64_t>::max(); | |
333 | bool no_signals_assigned = true; | |
334 | ||
335 | for (const data::DecodeChannel &ch : channels_) | |
336 | if (ch.assigned_signal) { | |
337 | no_signals_assigned = false; | |
338 | ||
339 | const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data(); | |
340 | if (!logic_data || logic_data->logic_segments().empty()) | |
341 | return 0; | |
342 | ||
343 | const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front(); | |
344 | count = min(count, (int64_t)segment->get_sample_count()); | |
345 | } | |
346 | ||
347 | return (no_signals_assigned ? 0 : count); | |
348 | } | |
349 | ||
350 | int64_t DecodeSignal::get_decoded_sample_count() const | |
351 | { | |
352 | lock_guard<mutex> decode_lock(output_mutex_); | |
353 | return samples_decoded_; | |
354 | } | |
355 | ||
356 | vector<Row> DecodeSignal::visible_rows() const | |
357 | { | |
358 | lock_guard<mutex> lock(output_mutex_); | |
359 | ||
360 | vector<Row> rows; | |
361 | ||
362 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
363 | assert(dec); | |
364 | if (!dec->shown()) | |
365 | continue; | |
366 | ||
367 | const srd_decoder *const decc = dec->decoder(); | |
368 | assert(dec->decoder()); | |
369 | ||
370 | // Add a row for the decoder if it doesn't have a row list | |
371 | if (!decc->annotation_rows) | |
372 | rows.emplace_back(decc); | |
373 | ||
374 | // Add the decoder rows | |
375 | for (const GSList *l = decc->annotation_rows; l; l = l->next) { | |
376 | const srd_decoder_annotation_row *const ann_row = | |
377 | (srd_decoder_annotation_row *)l->data; | |
378 | assert(ann_row); | |
379 | rows.emplace_back(decc, ann_row); | |
380 | } | |
381 | } | |
382 | ||
383 | return rows; | |
384 | } | |
385 | ||
386 | void DecodeSignal::get_annotation_subset( | |
387 | vector<pv::data::decode::Annotation> &dest, | |
388 | const decode::Row &row, uint64_t start_sample, | |
389 | uint64_t end_sample) const | |
390 | { | |
391 | lock_guard<mutex> lock(output_mutex_); | |
392 | ||
393 | const auto iter = rows_.find(row); | |
394 | if (iter != rows_.end()) | |
395 | (*iter).second.get_annotation_subset(dest, | |
396 | start_sample, end_sample); | |
397 | } | |
398 | ||
399 | void DecodeSignal::save_settings(QSettings &settings) const | |
400 | { | |
401 | SignalBase::save_settings(settings); | |
402 | ||
403 | // TODO Save decoder stack, channel mapping and decoder options | |
404 | } | |
405 | ||
406 | void DecodeSignal::restore_settings(QSettings &settings) | |
407 | { | |
408 | SignalBase::restore_settings(settings); | |
409 | ||
410 | // TODO Restore decoder stack, channel mapping and decoder options | |
411 | } | |
412 | ||
413 | uint64_t DecodeSignal::inc_annotation_count() | |
414 | { | |
415 | return (annotation_count_++); | |
416 | } | |
417 | ||
418 | void DecodeSignal::update_channel_list() | |
419 | { | |
420 | vector<data::DecodeChannel> prev_channels = channels_; | |
421 | channels_.clear(); | |
422 | ||
423 | uint16_t id = 0; | |
424 | ||
425 | // Copy existing entries, create new as needed | |
426 | for (shared_ptr<Decoder> decoder : stack_) { | |
427 | const srd_decoder* srd_d = decoder->decoder(); | |
428 | const GSList *l; | |
429 | ||
430 | // Mandatory channels | |
431 | for (l = srd_d->channels; l; l = l->next) { | |
432 | const struct srd_channel *const pdch = (struct srd_channel *)l->data; | |
433 | bool ch_added = false; | |
434 | ||
435 | // Copy but update ID if this channel was in the list before | |
436 | for (data::DecodeChannel &ch : prev_channels) | |
437 | if (ch.pdch_ == pdch) { | |
438 | ch.id = id++; | |
439 | channels_.push_back(ch); | |
440 | ch_added = true; | |
441 | break; | |
442 | } | |
443 | ||
444 | if (!ch_added) { | |
445 | // Create new entry without a mapped signal | |
446 | data::DecodeChannel ch = {id++, false, nullptr, | |
447 | QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc), | |
448 | SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch}; | |
449 | channels_.push_back(ch); | |
450 | } | |
451 | } | |
452 | ||
453 | // Optional channels | |
454 | for (l = srd_d->opt_channels; l; l = l->next) { | |
455 | const struct srd_channel *const pdch = (struct srd_channel *)l->data; | |
456 | bool ch_added = false; | |
457 | ||
458 | // Copy but update ID if this channel was in the list before | |
459 | for (data::DecodeChannel &ch : prev_channels) | |
460 | if (ch.pdch_ == pdch) { | |
461 | ch.id = id++; | |
462 | channels_.push_back(ch); | |
463 | ch_added = true; | |
464 | break; | |
465 | } | |
466 | ||
467 | if (!ch_added) { | |
468 | // Create new entry without a mapped signal | |
469 | data::DecodeChannel ch = {id++, true, nullptr, | |
470 | QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc), | |
471 | SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch}; | |
472 | channels_.push_back(ch); | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
477 | // Invalidate the logic output data if the channel assignment changed | |
478 | if (prev_channels.size() != channels_.size()) { | |
479 | // The number of channels changed, there's definitely a difference | |
480 | logic_mux_data_invalid_ = true; | |
481 | } else { | |
482 | // Same number but assignment may still differ, so compare all channels | |
483 | for (size_t i = 0; i < channels_.size(); i++) { | |
484 | const data::DecodeChannel &p_ch = prev_channels[i]; | |
485 | const data::DecodeChannel &ch = channels_[i]; | |
486 | ||
487 | if ((p_ch.pdch_ != ch.pdch_) || | |
488 | (p_ch.assigned_signal != ch.assigned_signal)) { | |
489 | logic_mux_data_invalid_ = true; | |
490 | break; | |
491 | } | |
492 | } | |
493 | ||
494 | } | |
495 | ||
496 | channels_updated(); | |
497 | } | |
498 | ||
499 | void DecodeSignal::commit_decoder_channels() | |
500 | { | |
501 | // Submit channel list to every decoder, containing only the relevant channels | |
502 | for (shared_ptr<decode::Decoder> dec : stack_) { | |
503 | vector<data::DecodeChannel*> channel_list; | |
504 | ||
505 | for (data::DecodeChannel &ch : channels_) | |
506 | if (ch.decoder_ == dec) | |
507 | channel_list.push_back(&ch); | |
508 | ||
509 | dec->set_channels(channel_list); | |
510 | } | |
511 | } | |
512 | ||
513 | void DecodeSignal::mux_logic_samples(const int64_t start, const int64_t end) | |
514 | { | |
515 | // Enforce end to be greater than start | |
516 | if (end <= start) | |
517 | return; | |
518 | ||
519 | // Fetch all segments and their data | |
520 | // TODO Currently, we assume only a single segment exists | |
521 | vector<shared_ptr<LogicSegment> > segments; | |
522 | vector<const uint8_t*> signal_data; | |
523 | vector<uint8_t> signal_in_bytepos; | |
524 | vector<uint8_t> signal_in_bitpos; | |
525 | ||
526 | for (data::DecodeChannel &ch : channels_) | |
527 | if (ch.assigned_signal) { | |
528 | const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data(); | |
529 | const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front(); | |
530 | segments.push_back(segment); | |
531 | signal_data.push_back(segment->get_samples(start, end)); | |
532 | ||
533 | const int bitpos = ch.assigned_signal->logic_bit_index(); | |
534 | signal_in_bytepos.push_back(bitpos / 8); | |
535 | signal_in_bitpos.push_back(bitpos % 8); | |
536 | } | |
537 | ||
538 | // Perform the muxing of signal data into the output data | |
539 | uint8_t* output = new uint8_t[(end - start) * segment_->unit_size()]; | |
540 | unsigned int signal_count = signal_data.size(); | |
541 | ||
542 | for (int64_t sample_cnt = 0; sample_cnt < (end - start); sample_cnt++) { | |
543 | int bitpos = 0; | |
544 | uint8_t bytepos = 0; | |
545 | ||
546 | const int out_sample_pos = sample_cnt * segment_->unit_size(); | |
547 | for (unsigned int i = 0; i < segment_->unit_size(); i++) | |
548 | output[out_sample_pos + i] = 0; | |
549 | ||
550 | for (unsigned int i = 0; i < signal_count; i++) { | |
551 | const int in_sample_pos = sample_cnt * segments[i]->unit_size(); | |
552 | const uint8_t in_sample = 1 & | |
553 | ((signal_data[i][in_sample_pos + signal_in_bytepos[i]]) >> (signal_in_bitpos[i])); | |
554 | ||
555 | const uint8_t out_sample = output[out_sample_pos + bytepos]; | |
556 | ||
557 | output[out_sample_pos + bytepos] = out_sample | (in_sample << bitpos); | |
558 | ||
559 | bitpos++; | |
560 | if (bitpos > 7) { | |
561 | bitpos = 0; | |
562 | bytepos++; | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
567 | segment_->append_payload(output, (end - start) * segment_->unit_size()); | |
568 | delete[] output; | |
569 | ||
570 | for (const uint8_t* data : signal_data) | |
571 | delete[] data; | |
572 | } | |
573 | ||
574 | void DecodeSignal::logic_mux_proc() | |
575 | { | |
576 | do { | |
577 | const uint64_t input_sample_count = get_working_sample_count(); | |
578 | const uint64_t output_sample_count = segment_->get_sample_count(); | |
579 | ||
580 | const uint64_t samples_to_process = | |
581 | (input_sample_count > output_sample_count) ? | |
582 | (input_sample_count - output_sample_count) : 0; | |
583 | ||
584 | // Process the samples if necessary... | |
585 | if (samples_to_process > 0) { | |
586 | const uint64_t unit_size = segment_->unit_size(); | |
587 | const uint64_t chunk_sample_count = DecodeChunkLength / unit_size; | |
588 | ||
589 | uint64_t processed_samples = 0; | |
590 | do { | |
591 | const uint64_t start_sample = output_sample_count + processed_samples; | |
592 | const uint64_t sample_count = | |
593 | min(samples_to_process - processed_samples, chunk_sample_count); | |
594 | ||
595 | mux_logic_samples(start_sample, start_sample + sample_count); | |
596 | processed_samples += sample_count; | |
597 | ||
598 | // ...and process the newly muxed logic data | |
599 | decode_input_cond_.notify_one(); | |
600 | } while (processed_samples < samples_to_process); | |
601 | } | |
602 | ||
603 | if (session_.get_capture_state() != Session::Stopped) { | |
604 | // Wait for more input | |
605 | unique_lock<mutex> logic_mux_lock(logic_mux_mutex_); | |
606 | logic_mux_cond_.wait(logic_mux_lock); | |
607 | } | |
608 | } while ((session_.get_capture_state() != Session::Stopped) && !logic_mux_interrupt_); | |
609 | ||
610 | // No more input data and session is stopped, let the decode thread | |
611 | // process any pending data, terminate and release the global SRD mutex | |
612 | // in order to let other decoders run | |
613 | decode_input_cond_.notify_one(); | |
614 | } | |
615 | ||
616 | void DecodeSignal::query_input_metadata() | |
617 | { | |
618 | // Update the samplerate and start time because we cannot start | |
619 | // the libsrd session without the current samplerate | |
620 | ||
621 | // TODO Currently we assume all channels have the same sample rate | |
622 | // and start time | |
623 | bool samplerate_valid = false; | |
624 | ||
625 | auto any_channel = find_if(channels_.begin(), channels_.end(), | |
626 | [](data::DecodeChannel ch) { return ch.assigned_signal; }); | |
627 | ||
628 | shared_ptr<Logic> logic_data = | |
629 | any_channel->assigned_signal->logic_data(); | |
630 | ||
631 | do { | |
632 | if (!logic_data->logic_segments().empty()) { | |
633 | shared_ptr<LogicSegment> first_segment = | |
634 | any_channel->assigned_signal->logic_data()->logic_segments().front(); | |
635 | start_time_ = first_segment->start_time(); | |
636 | samplerate_ = first_segment->samplerate(); | |
637 | if (samplerate_ > 0) | |
638 | samplerate_valid = true; | |
639 | } | |
640 | ||
641 | // Wait until input data is available or an interrupt was requested | |
642 | unique_lock<mutex> input_wait_lock(input_mutex_); | |
643 | decode_input_cond_.wait(input_wait_lock); | |
644 | } while (!samplerate_valid && !decode_interrupt_); | |
645 | } | |
646 | ||
647 | void DecodeSignal::decode_data( | |
648 | const int64_t abs_start_samplenum, const int64_t sample_count) | |
649 | { | |
650 | const int64_t unit_size = segment_->unit_size(); | |
651 | const int64_t chunk_sample_count = DecodeChunkLength / unit_size; | |
652 | ||
653 | for (int64_t i = abs_start_samplenum; | |
654 | !decode_interrupt_ && (i < (abs_start_samplenum + sample_count)); | |
655 | i += chunk_sample_count) { | |
656 | ||
657 | const int64_t chunk_end = min(i + chunk_sample_count, | |
658 | abs_start_samplenum + sample_count); | |
659 | ||
660 | const uint8_t* chunk = segment_->get_samples(i, chunk_end); | |
661 | ||
662 | if (srd_session_send(srd_session_, i, chunk_end, chunk, | |
663 | (chunk_end - i) * unit_size, unit_size) != SRD_OK) { | |
664 | error_message_ = tr("Decoder reported an error"); | |
665 | delete[] chunk; | |
666 | break; | |
667 | } | |
668 | ||
669 | delete[] chunk; | |
670 | ||
671 | { | |
672 | lock_guard<mutex> lock(output_mutex_); | |
673 | samples_decoded_ = chunk_end; | |
674 | } | |
675 | } | |
676 | } | |
677 | ||
678 | void DecodeSignal::decode_proc() | |
679 | { | |
680 | query_input_metadata(); | |
681 | ||
682 | if (decode_interrupt_) | |
683 | return; | |
684 | ||
685 | start_srd_session(); | |
686 | ||
687 | uint64_t sample_count; | |
688 | uint64_t abs_start_samplenum = 0; | |
689 | do { | |
690 | // Keep processing new samples until we exhaust the input data | |
691 | do { | |
692 | // Prevent any other decode threads from accessing libsigrokdecode | |
693 | lock_guard<mutex> srd_lock(global_srd_mutex_); | |
694 | ||
695 | { | |
696 | lock_guard<mutex> input_lock(input_mutex_); | |
697 | sample_count = segment_->get_sample_count() - abs_start_samplenum; | |
698 | } | |
699 | ||
700 | if (sample_count > 0) { | |
701 | decode_data(abs_start_samplenum, sample_count); | |
702 | abs_start_samplenum += sample_count; | |
703 | } | |
704 | } while (error_message_.isEmpty() && (sample_count > 0)); | |
705 | ||
706 | if (error_message_.isEmpty()) { | |
707 | // Make sure all annotations are known to the frontend | |
708 | new_annotations(); | |
709 | ||
710 | // Wait for new input data or an interrupt was requested | |
711 | unique_lock<mutex> input_wait_lock(input_mutex_); | |
712 | decode_input_cond_.wait(input_wait_lock); | |
713 | } | |
714 | } while (error_message_.isEmpty() && !decode_interrupt_); | |
715 | } | |
716 | ||
717 | void DecodeSignal::start_srd_session() | |
718 | { | |
719 | if (srd_session_) | |
720 | stop_srd_session(); | |
721 | ||
722 | // Create the session | |
723 | srd_session_new(&srd_session_); | |
724 | assert(srd_session_); | |
725 | ||
726 | // Create the decoders | |
727 | srd_decoder_inst *prev_di = nullptr; | |
728 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
729 | srd_decoder_inst *const di = dec->create_decoder_inst(srd_session_); | |
730 | ||
731 | if (!di) { | |
732 | error_message_ = tr("Failed to create decoder instance"); | |
733 | srd_session_destroy(srd_session_); | |
734 | return; | |
735 | } | |
736 | ||
737 | if (prev_di) | |
738 | srd_inst_stack(srd_session_, prev_di, di); | |
739 | ||
740 | prev_di = di; | |
741 | } | |
742 | ||
743 | // Start the session | |
744 | srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE, | |
745 | g_variant_new_uint64(samplerate_)); | |
746 | ||
747 | srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_ANN, | |
748 | DecodeSignal::annotation_callback, this); | |
749 | ||
750 | srd_session_start(srd_session_); | |
751 | } | |
752 | ||
753 | void DecodeSignal::stop_srd_session() | |
754 | { | |
755 | if (srd_session_) { | |
756 | // Destroy the session | |
757 | srd_session_destroy(srd_session_); | |
758 | srd_session_ = nullptr; | |
759 | } | |
760 | } | |
761 | ||
762 | void DecodeSignal::connect_input_notifiers() | |
763 | { | |
764 | // Disconnect the notification slot from the previous set of signals | |
765 | disconnect(this, SLOT(on_data_received())); | |
766 | ||
767 | // Connect the currently used signals to our slot | |
768 | for (data::DecodeChannel &ch : channels_) { | |
769 | if (!ch.assigned_signal) | |
770 | continue; | |
771 | ||
772 | shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data(); | |
773 | connect(logic_data.get(), SIGNAL(samples_added(QObject*, uint64_t, uint64_t)), | |
774 | this, SLOT(on_data_received())); | |
775 | } | |
776 | } | |
777 | ||
778 | void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signal) | |
779 | { | |
780 | assert(pdata); | |
781 | assert(decoder); | |
782 | ||
783 | DecodeSignal *const ds = (DecodeSignal*)decode_signal; | |
784 | assert(ds); | |
785 | ||
786 | lock_guard<mutex> lock(ds->output_mutex_); | |
787 | ||
788 | const decode::Annotation a(pdata); | |
789 | ||
790 | // Find the row | |
791 | assert(pdata->pdo); | |
792 | assert(pdata->pdo->di); | |
793 | const srd_decoder *const decc = pdata->pdo->di->decoder; | |
794 | assert(decc); | |
795 | ||
796 | auto row_iter = ds->rows_.end(); | |
797 | ||
798 | // Try looking up the sub-row of this class | |
799 | const auto r = ds->class_rows_.find(make_pair(decc, a.format())); | |
800 | if (r != ds->class_rows_.end()) | |
801 | row_iter = ds->rows_.find((*r).second); | |
802 | else { | |
803 | // Failing that, use the decoder as a key | |
804 | row_iter = ds->rows_.find(Row(decc)); | |
805 | } | |
806 | ||
807 | assert(row_iter != ds->rows_.end()); | |
808 | if (row_iter == ds->rows_.end()) { | |
809 | qDebug() << "Unexpected annotation: decoder = " << decc << | |
810 | ", format = " << a.format(); | |
811 | assert(false); | |
812 | return; | |
813 | } | |
814 | ||
815 | // Add the annotation | |
816 | (*row_iter).second.push_annotation(a); | |
817 | ||
818 | // Notify the frontend every DecodeNotifyPeriod annotations | |
819 | if (ds->inc_annotation_count() % DecodeNotifyPeriod == 0) | |
820 | ds->new_annotations(); | |
821 | } | |
822 | ||
823 | void DecodeSignal::on_capture_state_changed(int state) | |
824 | { | |
825 | // If a new acquisition was started, we need to start decoding from scratch | |
826 | if (state == Session::Running) | |
827 | begin_decode(); | |
828 | } | |
829 | ||
830 | void DecodeSignal::on_data_received() | |
831 | { | |
832 | logic_mux_cond_.notify_one(); | |
833 | } | |
834 | ||
835 | } // namespace data | |
836 | } // namespace pv |