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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 | connect(&session_, SIGNAL(data_received()), | |
69 | this, SLOT(on_data_received())); | |
70 | connect(&session_, SIGNAL(frame_ended()), | |
71 | this, SLOT(on_frame_ended())); | |
72 | ||
73 | set_name(tr("Empty decoder signal")); | |
74 | } | |
75 | ||
76 | DecodeSignal::~DecodeSignal() | |
77 | { | |
78 | if (decode_thread_.joinable()) { | |
79 | decode_interrupt_ = true; | |
80 | decode_input_cond_.notify_one(); | |
81 | decode_thread_.join(); | |
82 | } | |
83 | ||
84 | if (logic_mux_thread_.joinable()) { | |
85 | logic_mux_interrupt_ = true; | |
86 | logic_mux_cond_.notify_one(); | |
87 | logic_mux_thread_.join(); | |
88 | } | |
89 | ||
90 | stop_srd_session(); | |
91 | } | |
92 | ||
93 | const vector< shared_ptr<Decoder> >& DecodeSignal::decoder_stack() const | |
94 | { | |
95 | return stack_; | |
96 | } | |
97 | ||
98 | void DecodeSignal::stack_decoder(srd_decoder *decoder) | |
99 | { | |
100 | assert(decoder); | |
101 | stack_.push_back(make_shared<decode::Decoder>(decoder)); | |
102 | ||
103 | // Set name if this decoder is the first in the list | |
104 | if (stack_.size() == 1) | |
105 | set_name(QString::fromUtf8(decoder->name)); | |
106 | ||
107 | // Include the newly created decode channels in the channel lists | |
108 | update_channel_list(); | |
109 | ||
110 | auto_assign_signals(); | |
111 | commit_decoder_channels(); | |
112 | begin_decode(); | |
113 | } | |
114 | ||
115 | void DecodeSignal::remove_decoder(int index) | |
116 | { | |
117 | assert(index >= 0); | |
118 | assert(index < (int)stack_.size()); | |
119 | ||
120 | // Find the decoder in the stack | |
121 | auto iter = stack_.begin(); | |
122 | for (int i = 0; i < index; i++, iter++) | |
123 | assert(iter != stack_.end()); | |
124 | ||
125 | // Delete the element | |
126 | stack_.erase(iter); | |
127 | ||
128 | // Update channels and decoded data | |
129 | update_channel_list(); | |
130 | begin_decode(); | |
131 | } | |
132 | ||
133 | bool DecodeSignal::toggle_decoder_visibility(int index) | |
134 | { | |
135 | auto iter = stack_.cbegin(); | |
136 | for (int i = 0; i < index; i++, iter++) | |
137 | assert(iter != stack_.end()); | |
138 | ||
139 | shared_ptr<Decoder> dec = *iter; | |
140 | ||
141 | // Toggle decoder visibility | |
142 | bool state = false; | |
143 | if (dec) { | |
144 | state = !dec->shown(); | |
145 | dec->show(state); | |
146 | } | |
147 | ||
148 | return state; | |
149 | } | |
150 | ||
151 | void DecodeSignal::reset_decode() | |
152 | { | |
153 | stop_srd_session(); | |
154 | ||
155 | annotation_count_ = 0; | |
156 | frame_complete_ = false; | |
157 | samples_decoded_ = 0; | |
158 | error_message_ = QString(); | |
159 | rows_.clear(); | |
160 | class_rows_.clear(); | |
161 | } | |
162 | ||
163 | void DecodeSignal::begin_decode() | |
164 | { | |
165 | if (decode_thread_.joinable()) { | |
166 | decode_interrupt_ = true; | |
167 | decode_input_cond_.notify_one(); | |
168 | decode_thread_.join(); | |
169 | } | |
170 | ||
171 | if (logic_mux_thread_.joinable()) { | |
172 | logic_mux_interrupt_ = true; | |
173 | logic_mux_cond_.notify_one(); | |
174 | logic_mux_thread_.join(); | |
175 | } | |
176 | ||
177 | reset_decode(); | |
178 | ||
179 | if (stack_.size() == 0) { | |
180 | error_message_ = tr("No decoders"); | |
181 | return; | |
182 | } | |
183 | ||
184 | assert(channels_.size() > 0); | |
185 | ||
186 | if (get_assigned_signal_count() == 0) { | |
187 | error_message_ = tr("There are no channels assigned to this decoder"); | |
188 | return; | |
189 | } | |
190 | ||
191 | // Check that all decoders have the required channels | |
192 | for (const shared_ptr<decode::Decoder> &dec : stack_) | |
193 | if (!dec->have_required_channels()) { | |
194 | error_message_ = tr("One or more required channels " | |
195 | "have not been specified"); | |
196 | return; | |
197 | } | |
198 | ||
199 | // Add annotation classes | |
200 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
201 | assert(dec); | |
202 | const srd_decoder *const decc = dec->decoder(); | |
203 | assert(dec->decoder()); | |
204 | ||
205 | // Add a row for the decoder if it doesn't have a row list | |
206 | if (!decc->annotation_rows) | |
207 | rows_[Row(decc)] = decode::RowData(); | |
208 | ||
209 | // Add the decoder rows | |
210 | for (const GSList *l = decc->annotation_rows; l; l = l->next) { | |
211 | const srd_decoder_annotation_row *const ann_row = | |
212 | (srd_decoder_annotation_row *)l->data; | |
213 | assert(ann_row); | |
214 | ||
215 | const Row row(decc, ann_row); | |
216 | ||
217 | // Add a new empty row data object | |
218 | rows_[row] = decode::RowData(); | |
219 | ||
220 | // Map out all the classes | |
221 | for (const GSList *ll = ann_row->ann_classes; | |
222 | ll; ll = ll->next) | |
223 | class_rows_[make_pair(decc, | |
224 | GPOINTER_TO_INT(ll->data))] = row; | |
225 | } | |
226 | } | |
227 | ||
228 | // TODO Currently we assume all channels have the same sample rate | |
229 | auto any_channel = find_if(channels_.begin(), channels_.end(), | |
230 | [](data::DecodeChannel ch) { return ch.assigned_signal; }); | |
231 | shared_ptr<LogicSegment> first_segment = | |
232 | any_channel->assigned_signal->logic_data()->logic_segments().front(); | |
233 | samplerate_ = first_segment->samplerate(); | |
234 | ||
235 | // Free the logic data and its segment(s) if it needs to be updated | |
236 | if (logic_mux_data_invalid_) | |
237 | logic_mux_data_.reset(); | |
238 | ||
239 | if (!logic_mux_data_) { | |
240 | const int64_t ch_count = get_assigned_signal_count(); | |
241 | const int64_t unit_size = (ch_count + 7) / 8; | |
242 | logic_mux_data_ = make_shared<Logic>(ch_count); | |
243 | segment_ = make_shared<LogicSegment>(*logic_mux_data_, unit_size, samplerate_); | |
244 | logic_mux_data_->push_segment(segment_); | |
245 | } | |
246 | ||
247 | // Update the samplerate and start time | |
248 | start_time_ = segment_->start_time(); | |
249 | samplerate_ = segment_->samplerate(); | |
250 | if (samplerate_ == 0.0) | |
251 | samplerate_ = 1.0; | |
252 | ||
253 | // Make sure the logic output data is complete and up-to-date | |
254 | logic_mux_interrupt_ = false; | |
255 | logic_mux_thread_ = std::thread(&DecodeSignal::logic_mux_proc, this); | |
256 | ||
257 | // Decode the muxed logic data | |
258 | decode_interrupt_ = false; | |
259 | decode_thread_ = std::thread(&DecodeSignal::decode_proc, this); | |
260 | } | |
261 | ||
262 | QString DecodeSignal::error_message() const | |
263 | { | |
264 | lock_guard<mutex> lock(output_mutex_); | |
265 | return error_message_; | |
266 | } | |
267 | ||
268 | const vector<data::DecodeChannel> DecodeSignal::get_channels() const | |
269 | { | |
270 | return channels_; | |
271 | } | |
272 | ||
273 | void DecodeSignal::auto_assign_signals() | |
274 | { | |
275 | bool new_assignment = false; | |
276 | ||
277 | // Try to auto-select channels that don't have signals assigned yet | |
278 | for (data::DecodeChannel &ch : channels_) { | |
279 | if (ch.assigned_signal) | |
280 | continue; | |
281 | ||
282 | for (shared_ptr<data::SignalBase> s : session_.signalbases()) | |
283 | if (s->logic_data() && (ch.name.toLower().contains(s->name().toLower()))) { | |
284 | ch.assigned_signal = s.get(); | |
285 | new_assignment = true; | |
286 | } | |
287 | } | |
288 | ||
289 | if (new_assignment) { | |
290 | logic_mux_data_invalid_ = true; | |
291 | commit_decoder_channels(); | |
292 | channels_updated(); | |
293 | } | |
294 | } | |
295 | ||
296 | void DecodeSignal::assign_signal(const uint16_t channel_id, const SignalBase *signal) | |
297 | { | |
298 | for (data::DecodeChannel &ch : channels_) | |
299 | if (ch.id == channel_id) { | |
300 | ch.assigned_signal = signal; | |
301 | logic_mux_data_invalid_ = true; | |
302 | } | |
303 | ||
304 | commit_decoder_channels(); | |
305 | channels_updated(); | |
306 | begin_decode(); | |
307 | } | |
308 | ||
309 | int DecodeSignal::get_assigned_signal_count() const | |
310 | { | |
311 | // Count all channels that have a signal assigned to them | |
312 | return count_if(channels_.begin(), channels_.end(), | |
313 | [](data::DecodeChannel ch) { return ch.assigned_signal; }); | |
314 | } | |
315 | ||
316 | void DecodeSignal::set_initial_pin_state(const uint16_t channel_id, const int init_state) | |
317 | { | |
318 | for (data::DecodeChannel &ch : channels_) | |
319 | if (ch.id == channel_id) | |
320 | ch.initial_pin_state = init_state; | |
321 | ||
322 | channels_updated(); | |
323 | ||
324 | begin_decode(); | |
325 | } | |
326 | ||
327 | double DecodeSignal::samplerate() const | |
328 | { | |
329 | return samplerate_; | |
330 | } | |
331 | ||
332 | const pv::util::Timestamp& DecodeSignal::start_time() const | |
333 | { | |
334 | return start_time_; | |
335 | } | |
336 | ||
337 | int64_t DecodeSignal::get_working_sample_count() const | |
338 | { | |
339 | // The working sample count is the highest sample number for | |
340 | // which all used signals have data available, so go through | |
341 | // all channels and use the lowest overall sample count of the | |
342 | // current segment | |
343 | ||
344 | // TODO Currently, we assume only a single segment exists | |
345 | ||
346 | int64_t count = std::numeric_limits<int64_t>::max(); | |
347 | bool no_signals_assigned = true; | |
348 | ||
349 | for (const data::DecodeChannel &ch : channels_) | |
350 | if (ch.assigned_signal) { | |
351 | no_signals_assigned = false; | |
352 | ||
353 | const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data(); | |
354 | if (!logic_data || logic_data->logic_segments().empty()) | |
355 | return 0; | |
356 | ||
357 | const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front(); | |
358 | count = min(count, (int64_t)segment->get_sample_count()); | |
359 | } | |
360 | ||
361 | return (no_signals_assigned ? 0 : count); | |
362 | } | |
363 | ||
364 | int64_t DecodeSignal::get_decoded_sample_count() const | |
365 | { | |
366 | lock_guard<mutex> decode_lock(output_mutex_); | |
367 | return samples_decoded_; | |
368 | } | |
369 | ||
370 | vector<Row> DecodeSignal::visible_rows() const | |
371 | { | |
372 | lock_guard<mutex> lock(output_mutex_); | |
373 | ||
374 | vector<Row> rows; | |
375 | ||
376 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
377 | assert(dec); | |
378 | if (!dec->shown()) | |
379 | continue; | |
380 | ||
381 | const srd_decoder *const decc = dec->decoder(); | |
382 | assert(dec->decoder()); | |
383 | ||
384 | // Add a row for the decoder if it doesn't have a row list | |
385 | if (!decc->annotation_rows) | |
386 | rows.emplace_back(decc); | |
387 | ||
388 | // Add the decoder rows | |
389 | for (const GSList *l = decc->annotation_rows; l; l = l->next) { | |
390 | const srd_decoder_annotation_row *const ann_row = | |
391 | (srd_decoder_annotation_row *)l->data; | |
392 | assert(ann_row); | |
393 | rows.emplace_back(decc, ann_row); | |
394 | } | |
395 | } | |
396 | ||
397 | return rows; | |
398 | } | |
399 | ||
400 | void DecodeSignal::get_annotation_subset( | |
401 | vector<pv::data::decode::Annotation> &dest, | |
402 | const decode::Row &row, uint64_t start_sample, | |
403 | uint64_t end_sample) const | |
404 | { | |
405 | lock_guard<mutex> lock(output_mutex_); | |
406 | ||
407 | const auto iter = rows_.find(row); | |
408 | if (iter != rows_.end()) | |
409 | (*iter).second.get_annotation_subset(dest, | |
410 | start_sample, end_sample); | |
411 | } | |
412 | ||
413 | void DecodeSignal::save_settings(QSettings &settings) const | |
414 | { | |
415 | SignalBase::save_settings(settings); | |
416 | ||
417 | // TODO Save decoder stack, channel mapping and decoder options | |
418 | } | |
419 | ||
420 | void DecodeSignal::restore_settings(QSettings &settings) | |
421 | { | |
422 | SignalBase::restore_settings(settings); | |
423 | ||
424 | // TODO Restore decoder stack, channel mapping and decoder options | |
425 | } | |
426 | ||
427 | uint64_t DecodeSignal::inc_annotation_count() | |
428 | { | |
429 | return (annotation_count_++); | |
430 | } | |
431 | ||
432 | void DecodeSignal::update_channel_list() | |
433 | { | |
434 | vector<data::DecodeChannel> prev_channels = channels_; | |
435 | channels_.clear(); | |
436 | ||
437 | uint16_t id = 0; | |
438 | ||
439 | // Copy existing entries, create new as needed | |
440 | for (shared_ptr<Decoder> decoder : stack_) { | |
441 | const srd_decoder* srd_d = decoder->decoder(); | |
442 | const GSList *l; | |
443 | ||
444 | // Mandatory channels | |
445 | for (l = srd_d->channels; l; l = l->next) { | |
446 | const struct srd_channel *const pdch = (struct srd_channel *)l->data; | |
447 | bool ch_added = false; | |
448 | ||
449 | // Copy but update ID if this channel was in the list before | |
450 | for (data::DecodeChannel &ch : prev_channels) | |
451 | if (ch.pdch_ == pdch) { | |
452 | ch.id = id++; | |
453 | channels_.push_back(ch); | |
454 | ch_added = true; | |
455 | break; | |
456 | } | |
457 | ||
458 | if (!ch_added) { | |
459 | // Create new entry without a mapped signal | |
460 | data::DecodeChannel ch = {id++, false, nullptr, | |
461 | QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc), | |
462 | SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch}; | |
463 | channels_.push_back(ch); | |
464 | } | |
465 | } | |
466 | ||
467 | // Optional channels | |
468 | for (l = srd_d->opt_channels; l; l = l->next) { | |
469 | const struct srd_channel *const pdch = (struct srd_channel *)l->data; | |
470 | bool ch_added = false; | |
471 | ||
472 | // Copy but update ID if this channel was in the list before | |
473 | for (data::DecodeChannel &ch : prev_channels) | |
474 | if (ch.pdch_ == pdch) { | |
475 | ch.id = id++; | |
476 | channels_.push_back(ch); | |
477 | ch_added = true; | |
478 | break; | |
479 | } | |
480 | ||
481 | if (!ch_added) { | |
482 | // Create new entry without a mapped signal | |
483 | data::DecodeChannel ch = {id++, true, nullptr, | |
484 | QString::fromUtf8(pdch->name), QString::fromUtf8(pdch->desc), | |
485 | SRD_INITIAL_PIN_SAME_AS_SAMPLE0, decoder, pdch}; | |
486 | channels_.push_back(ch); | |
487 | } | |
488 | } | |
489 | } | |
490 | ||
491 | // Invalidate the logic output data if the channel assignment changed | |
492 | if (prev_channels.size() != channels_.size()) { | |
493 | // The number of channels changed, there's definitely a difference | |
494 | logic_mux_data_invalid_ = true; | |
495 | } else { | |
496 | // Same number but assignment may still differ, so compare all channels | |
497 | for (size_t i = 0; i < channels_.size(); i++) { | |
498 | const data::DecodeChannel &p_ch = prev_channels[i]; | |
499 | const data::DecodeChannel &ch = channels_[i]; | |
500 | ||
501 | if ((p_ch.pdch_ != ch.pdch_) || | |
502 | (p_ch.assigned_signal != ch.assigned_signal)) { | |
503 | logic_mux_data_invalid_ = true; | |
504 | break; | |
505 | } | |
506 | } | |
507 | ||
508 | } | |
509 | ||
510 | channels_updated(); | |
511 | } | |
512 | ||
513 | void DecodeSignal::commit_decoder_channels() | |
514 | { | |
515 | // Submit channel list to every decoder, containing only the relevant channels | |
516 | for (shared_ptr<decode::Decoder> dec : stack_) { | |
517 | vector<data::DecodeChannel*> channel_list; | |
518 | ||
519 | for (data::DecodeChannel &ch : channels_) | |
520 | if (ch.decoder_ == dec) | |
521 | channel_list.push_back(&ch); | |
522 | ||
523 | dec->set_channels(channel_list); | |
524 | } | |
525 | } | |
526 | ||
527 | void DecodeSignal::mux_logic_samples(const int64_t start, const int64_t end) | |
528 | { | |
529 | // Enforce end to be greater than start | |
530 | if (end <= start) | |
531 | return; | |
532 | ||
533 | // Fetch all segments and their data | |
534 | // TODO Currently, we assume only a single segment exists | |
535 | vector<shared_ptr<LogicSegment> > segments; | |
536 | vector<const uint8_t*> signal_data; | |
537 | vector<uint8_t> signal_in_bytepos; | |
538 | vector<uint8_t> signal_in_bitpos; | |
539 | ||
540 | for (data::DecodeChannel &ch : channels_) | |
541 | if (ch.assigned_signal) { | |
542 | const shared_ptr<Logic> logic_data = ch.assigned_signal->logic_data(); | |
543 | const shared_ptr<LogicSegment> segment = logic_data->logic_segments().front(); | |
544 | segments.push_back(segment); | |
545 | signal_data.push_back(segment->get_samples(start, end)); | |
546 | ||
547 | const int bitpos = ch.assigned_signal->logic_bit_index(); | |
548 | signal_in_bytepos.push_back(bitpos / 8); | |
549 | signal_in_bitpos.push_back(bitpos % 8); | |
550 | } | |
551 | ||
552 | // Perform the muxing of signal data into the output data | |
553 | uint8_t* output = new uint8_t[(end - start) * segment_->unit_size()]; | |
554 | unsigned int signal_count = signal_data.size(); | |
555 | ||
556 | for (int64_t sample_cnt = 0; sample_cnt < (end - start); sample_cnt++) { | |
557 | int bitpos = 0; | |
558 | uint8_t bytepos = 0; | |
559 | ||
560 | const int out_sample_pos = sample_cnt * segment_->unit_size(); | |
561 | for (unsigned int i = 0; i < segment_->unit_size(); i++) | |
562 | output[out_sample_pos + i] = 0; | |
563 | ||
564 | for (unsigned int i = 0; i < signal_count; i++) { | |
565 | const int in_sample_pos = sample_cnt * segments[i]->unit_size(); | |
566 | const uint8_t in_sample = 1 & | |
567 | ((signal_data[i][in_sample_pos + signal_in_bytepos[i]]) >> (signal_in_bitpos[i])); | |
568 | ||
569 | const uint8_t out_sample = output[out_sample_pos + bytepos]; | |
570 | ||
571 | output[out_sample_pos + bytepos] = out_sample | (in_sample << bitpos); | |
572 | ||
573 | bitpos++; | |
574 | if (bitpos > 7) { | |
575 | bitpos = 0; | |
576 | bytepos++; | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | segment_->append_payload(output, (end - start) * segment_->unit_size()); | |
582 | delete[] output; | |
583 | ||
584 | for (const uint8_t* data : signal_data) | |
585 | delete[] data; | |
586 | } | |
587 | ||
588 | void DecodeSignal::logic_mux_proc() | |
589 | { | |
590 | do { | |
591 | ||
592 | const uint64_t input_sample_count = get_working_sample_count(); | |
593 | const uint64_t output_sample_count = segment_->get_sample_count(); | |
594 | ||
595 | const uint64_t samples_to_process = | |
596 | (input_sample_count > output_sample_count) ? | |
597 | (input_sample_count - output_sample_count) : 0; | |
598 | ||
599 | // Process the samples if necessary... | |
600 | if (samples_to_process > 0) { | |
601 | const uint64_t unit_size = segment_->unit_size(); | |
602 | const uint64_t chunk_sample_count = DecodeChunkLength / unit_size; | |
603 | ||
604 | uint64_t processed_samples = 0; | |
605 | do { | |
606 | const uint64_t start_sample = output_sample_count + processed_samples; | |
607 | const uint64_t sample_count = | |
608 | min(samples_to_process - processed_samples, chunk_sample_count); | |
609 | ||
610 | mux_logic_samples(start_sample, start_sample + sample_count); | |
611 | processed_samples += sample_count; | |
612 | ||
613 | // ...and process the newly muxed logic data | |
614 | decode_input_cond_.notify_one(); | |
615 | } while (processed_samples < samples_to_process); | |
616 | } | |
617 | ||
618 | if (session_.get_capture_state() != Session::Stopped) { | |
619 | // Wait for more input | |
620 | unique_lock<mutex> logic_mux_lock(logic_mux_mutex_); | |
621 | logic_mux_cond_.wait(logic_mux_lock); | |
622 | } | |
623 | } while ((session_.get_capture_state() != Session::Stopped) && !logic_mux_interrupt_); | |
624 | ||
625 | // No more input data and session is stopped, let the decode thread | |
626 | // process any pending data, terminate and release the global SRD mutex | |
627 | // in order to let other decoders run | |
628 | decode_input_cond_.notify_one(); | |
629 | } | |
630 | ||
631 | void DecodeSignal::decode_data( | |
632 | const int64_t abs_start_samplenum, const int64_t sample_count) | |
633 | { | |
634 | const int64_t unit_size = segment_->unit_size(); | |
635 | const int64_t chunk_sample_count = DecodeChunkLength / unit_size; | |
636 | ||
637 | for (int64_t i = abs_start_samplenum; | |
638 | !decode_interrupt_ && (i < (abs_start_samplenum + sample_count)); | |
639 | i += chunk_sample_count) { | |
640 | ||
641 | const int64_t chunk_end = min(i + chunk_sample_count, | |
642 | abs_start_samplenum + sample_count); | |
643 | ||
644 | const uint8_t* chunk = segment_->get_samples(i, chunk_end); | |
645 | ||
646 | if (srd_session_send(srd_session_, i, chunk_end, chunk, | |
647 | (chunk_end - i) * unit_size, unit_size) != SRD_OK) { | |
648 | error_message_ = tr("Decoder reported an error"); | |
649 | delete[] chunk; | |
650 | break; | |
651 | } | |
652 | delete[] chunk; | |
653 | ||
654 | { | |
655 | lock_guard<mutex> lock(output_mutex_); | |
656 | samples_decoded_ = chunk_end; | |
657 | } | |
658 | } | |
659 | } | |
660 | ||
661 | void DecodeSignal::decode_proc() | |
662 | { | |
663 | start_srd_session(); | |
664 | ||
665 | uint64_t sample_count; | |
666 | uint64_t abs_start_samplenum = 0; | |
667 | do { | |
668 | // Keep processing new samples until we exhaust the input data | |
669 | do { | |
670 | // Prevent any other decode threads from accessing libsigrokdecode | |
671 | lock_guard<mutex> srd_lock(global_srd_mutex_); | |
672 | ||
673 | { | |
674 | lock_guard<mutex> input_lock(input_mutex_); | |
675 | sample_count = segment_->get_sample_count() - abs_start_samplenum; | |
676 | } | |
677 | ||
678 | if (sample_count > 0) { | |
679 | decode_data(abs_start_samplenum, sample_count); | |
680 | abs_start_samplenum += sample_count; | |
681 | } | |
682 | } while (error_message_.isEmpty() && (sample_count > 0)); | |
683 | ||
684 | if (error_message_.isEmpty()) { | |
685 | // Make sure all annotations are known to the frontend | |
686 | new_annotations(); | |
687 | ||
688 | // Wait for new input data or an interrupt request | |
689 | unique_lock<mutex> input_wait_lock(input_mutex_); | |
690 | decode_input_cond_.wait(input_wait_lock); | |
691 | } | |
692 | } while (error_message_.isEmpty() && !decode_interrupt_); | |
693 | } | |
694 | ||
695 | void DecodeSignal::start_srd_session() | |
696 | { | |
697 | if (!srd_session_) { | |
698 | // Create the session | |
699 | srd_session_new(&srd_session_); | |
700 | assert(srd_session_); | |
701 | ||
702 | // Create the decoders | |
703 | srd_decoder_inst *prev_di = nullptr; | |
704 | for (const shared_ptr<decode::Decoder> &dec : stack_) { | |
705 | srd_decoder_inst *const di = dec->create_decoder_inst(srd_session_); | |
706 | ||
707 | if (!di) { | |
708 | error_message_ = tr("Failed to create decoder instance"); | |
709 | srd_session_destroy(srd_session_); | |
710 | return; | |
711 | } | |
712 | ||
713 | if (prev_di) | |
714 | srd_inst_stack(srd_session_, prev_di, di); | |
715 | ||
716 | prev_di = di; | |
717 | } | |
718 | ||
719 | // Start the session | |
720 | srd_session_metadata_set(srd_session_, SRD_CONF_SAMPLERATE, | |
721 | g_variant_new_uint64(samplerate_)); | |
722 | ||
723 | srd_pd_output_callback_add(srd_session_, SRD_OUTPUT_ANN, | |
724 | DecodeSignal::annotation_callback, this); | |
725 | ||
726 | srd_session_start(srd_session_); | |
727 | } | |
728 | } | |
729 | ||
730 | void DecodeSignal::stop_srd_session() | |
731 | { | |
732 | if (srd_session_) { | |
733 | // Destroy the session | |
734 | srd_session_destroy(srd_session_); | |
735 | srd_session_ = nullptr; | |
736 | } | |
737 | } | |
738 | ||
739 | void DecodeSignal::annotation_callback(srd_proto_data *pdata, void *decode_signal) | |
740 | { | |
741 | assert(pdata); | |
742 | assert(decoder); | |
743 | ||
744 | DecodeSignal *const ds = (DecodeSignal*)decode_signal; | |
745 | assert(ds); | |
746 | ||
747 | lock_guard<mutex> lock(ds->output_mutex_); | |
748 | ||
749 | const decode::Annotation a(pdata); | |
750 | ||
751 | // Find the row | |
752 | assert(pdata->pdo); | |
753 | assert(pdata->pdo->di); | |
754 | const srd_decoder *const decc = pdata->pdo->di->decoder; | |
755 | assert(decc); | |
756 | ||
757 | auto row_iter = ds->rows_.end(); | |
758 | ||
759 | // Try looking up the sub-row of this class | |
760 | const auto r = ds->class_rows_.find(make_pair(decc, a.format())); | |
761 | if (r != ds->class_rows_.end()) | |
762 | row_iter = ds->rows_.find((*r).second); | |
763 | else { | |
764 | // Failing that, use the decoder as a key | |
765 | row_iter = ds->rows_.find(Row(decc)); | |
766 | } | |
767 | ||
768 | assert(row_iter != ds->rows_.end()); | |
769 | if (row_iter == ds->rows_.end()) { | |
770 | qDebug() << "Unexpected annotation: decoder = " << decc << | |
771 | ", format = " << a.format(); | |
772 | assert(false); | |
773 | return; | |
774 | } | |
775 | ||
776 | // Add the annotation | |
777 | (*row_iter).second.push_annotation(a); | |
778 | ||
779 | // Notify the frontend every DecodeNotifyPeriod annotations | |
780 | if (ds->inc_annotation_count() % DecodeNotifyPeriod == 0) | |
781 | ds->new_annotations(); | |
782 | } | |
783 | ||
784 | void DecodeSignal::on_capture_state_changed(int state) | |
785 | { | |
786 | // If a new acquisition was started, we need to start decoding from scratch | |
787 | if (state == Session::Running) | |
788 | begin_decode(); | |
789 | } | |
790 | ||
791 | void DecodeSignal::on_data_received() | |
792 | { | |
793 | logic_mux_cond_.notify_one(); | |
794 | } | |
795 | ||
796 | void DecodeSignal::on_frame_ended() | |
797 | { | |
798 | logic_mux_cond_.notify_one(); | |
799 | } | |
800 | ||
801 | } // namespace data | |
802 | } // namespace pv |