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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 "sigsession.h" | |
22 | ||
23 | #include "devicemanager.h" | |
24 | ||
25 | #include "data/analog.h" | |
26 | #include "data/analogsnapshot.h" | |
27 | #include "data/decoder.h" | |
28 | #include "data/logic.h" | |
29 | #include "data/logicsnapshot.h" | |
30 | ||
31 | #include "view/analogsignal.h" | |
32 | #include "view/decodesignal.h" | |
33 | #include "view/logicsignal.h" | |
34 | ||
35 | #include <assert.h> | |
36 | ||
37 | #include <sys/stat.h> | |
38 | ||
39 | #include <QDebug> | |
40 | ||
41 | using namespace boost; | |
42 | using namespace std; | |
43 | ||
44 | namespace pv { | |
45 | ||
46 | // TODO: This should not be necessary | |
47 | SigSession* SigSession::_session = NULL; | |
48 | ||
49 | SigSession::SigSession(DeviceManager &device_manager) : | |
50 | _device_manager(device_manager), | |
51 | _sdi(NULL), | |
52 | _capture_state(Stopped) | |
53 | { | |
54 | // TODO: This should not be necessary | |
55 | _session = this; | |
56 | } | |
57 | ||
58 | SigSession::~SigSession() | |
59 | { | |
60 | stop_capture(); | |
61 | ||
62 | _sampling_thread.join(); | |
63 | ||
64 | if (_sdi) | |
65 | _device_manager.release_device(_sdi); | |
66 | _sdi = NULL; | |
67 | ||
68 | // TODO: This should not be necessary | |
69 | _session = NULL; | |
70 | } | |
71 | ||
72 | struct sr_dev_inst* SigSession::get_device() const | |
73 | { | |
74 | return _sdi; | |
75 | } | |
76 | ||
77 | void SigSession::set_device(struct sr_dev_inst *sdi) | |
78 | { | |
79 | if (_sdi) | |
80 | _device_manager.release_device(_sdi); | |
81 | if (sdi) | |
82 | _device_manager.use_device(sdi, this); | |
83 | _sdi = sdi; | |
84 | update_signals(sdi); | |
85 | } | |
86 | ||
87 | void SigSession::release_device(struct sr_dev_inst *sdi) | |
88 | { | |
89 | (void)sdi; | |
90 | ||
91 | assert(_capture_state == Stopped); | |
92 | _sdi = NULL; | |
93 | update_signals(NULL); | |
94 | } | |
95 | ||
96 | void SigSession::load_file(const string &name, | |
97 | function<void (const QString)> error_handler) | |
98 | { | |
99 | stop_capture(); | |
100 | ||
101 | if (sr_session_load(name.c_str()) == SR_OK) { | |
102 | GSList *devlist = NULL; | |
103 | sr_session_dev_list(&devlist); | |
104 | ||
105 | if (!devlist || !devlist->data || | |
106 | sr_session_start() != SR_OK) { | |
107 | error_handler(tr("Failed to start session.")); | |
108 | return; | |
109 | } | |
110 | ||
111 | sr_dev_inst *const sdi = (sr_dev_inst*)devlist->data; | |
112 | g_slist_free(devlist); | |
113 | ||
114 | update_signals(sdi); | |
115 | read_sample_rate(sdi); | |
116 | ||
117 | _sampling_thread = boost::thread( | |
118 | &SigSession::load_session_thread_proc, this, | |
119 | error_handler); | |
120 | ||
121 | } else { | |
122 | sr_input *in = NULL; | |
123 | ||
124 | if (!(in = load_input_file_format(name.c_str(), | |
125 | error_handler))) | |
126 | return; | |
127 | ||
128 | update_signals(in->sdi); | |
129 | read_sample_rate(in->sdi); | |
130 | ||
131 | _sampling_thread = boost::thread( | |
132 | &SigSession::load_input_thread_proc, this, | |
133 | name, in, error_handler); | |
134 | } | |
135 | } | |
136 | ||
137 | SigSession::capture_state SigSession::get_capture_state() const | |
138 | { | |
139 | lock_guard<mutex> lock(_sampling_mutex); | |
140 | return _capture_state; | |
141 | } | |
142 | ||
143 | void SigSession::start_capture(uint64_t record_length, | |
144 | function<void (const QString)> error_handler) | |
145 | { | |
146 | stop_capture(); | |
147 | ||
148 | // Check that a device instance has been selected. | |
149 | if (!_sdi) { | |
150 | qDebug() << "No device selected"; | |
151 | return; | |
152 | } | |
153 | ||
154 | // Check that at least one probe is enabled | |
155 | const GSList *l; | |
156 | for (l = _sdi->probes; l; l = l->next) { | |
157 | sr_probe *const probe = (sr_probe*)l->data; | |
158 | assert(probe); | |
159 | if (probe->enabled) | |
160 | break; | |
161 | } | |
162 | ||
163 | if (!l) { | |
164 | error_handler(tr("No probes enabled.")); | |
165 | return; | |
166 | } | |
167 | ||
168 | // Begin the session | |
169 | _sampling_thread = boost::thread( | |
170 | &SigSession::sample_thread_proc, this, _sdi, | |
171 | record_length, error_handler); | |
172 | } | |
173 | ||
174 | void SigSession::stop_capture() | |
175 | { | |
176 | if (get_capture_state() == Stopped) | |
177 | return; | |
178 | ||
179 | sr_session_stop(); | |
180 | ||
181 | // Check that sampling stopped | |
182 | _sampling_thread.join(); | |
183 | } | |
184 | ||
185 | vector< shared_ptr<view::Signal> > SigSession::get_signals() const | |
186 | { | |
187 | lock_guard<mutex> lock(_signals_mutex); | |
188 | return _signals; | |
189 | } | |
190 | ||
191 | boost::shared_ptr<data::Logic> SigSession::get_data() | |
192 | { | |
193 | return _logic_data; | |
194 | } | |
195 | ||
196 | void SigSession::add_decoder(srd_decoder *const dec, | |
197 | std::map<const srd_probe*, | |
198 | boost::shared_ptr<view::Signal> > probes) | |
199 | { | |
200 | { | |
201 | lock_guard<mutex> lock(_signals_mutex); | |
202 | ||
203 | if (!_decode_traces.empty()) { | |
204 | qDebug("Currently only one decode trace can be added " | |
205 | "at once"); | |
206 | _decode_traces.clear(); | |
207 | } | |
208 | ||
209 | shared_ptr<data::Decoder> decoder( | |
210 | new data::Decoder(dec, probes)); | |
211 | shared_ptr<view::DecodeSignal> d( | |
212 | new view::DecodeSignal(*this, decoder)); | |
213 | _decode_traces.push_back(d); | |
214 | } | |
215 | signals_changed(); | |
216 | } | |
217 | ||
218 | vector< shared_ptr<view::DecodeSignal> > SigSession::get_decode_signals() const | |
219 | { | |
220 | lock_guard<mutex> lock(_signals_mutex); | |
221 | return _decode_traces; | |
222 | } | |
223 | ||
224 | void SigSession::set_capture_state(capture_state state) | |
225 | { | |
226 | lock_guard<mutex> lock(_sampling_mutex); | |
227 | const bool changed = _capture_state != state; | |
228 | _capture_state = state; | |
229 | if(changed) | |
230 | capture_state_changed(state); | |
231 | } | |
232 | ||
233 | /** | |
234 | * Attempts to autodetect the format. Failing that | |
235 | * @param filename The filename of the input file. | |
236 | * @return A pointer to the 'struct sr_input_format' that should be used, | |
237 | * or NULL if no input format was selected or auto-detected. | |
238 | */ | |
239 | sr_input_format* SigSession::determine_input_file_format( | |
240 | const string &filename) | |
241 | { | |
242 | int i; | |
243 | ||
244 | /* If there are no input formats, return NULL right away. */ | |
245 | sr_input_format *const *const inputs = sr_input_list(); | |
246 | if (!inputs) { | |
247 | g_critical("No supported input formats available."); | |
248 | return NULL; | |
249 | } | |
250 | ||
251 | /* Otherwise, try to find an input module that can handle this file. */ | |
252 | for (i = 0; inputs[i]; i++) { | |
253 | if (inputs[i]->format_match(filename.c_str())) | |
254 | break; | |
255 | } | |
256 | ||
257 | /* Return NULL if no input module wanted to touch this. */ | |
258 | if (!inputs[i]) { | |
259 | g_critical("Error: no matching input module found."); | |
260 | return NULL; | |
261 | } | |
262 | ||
263 | return inputs[i]; | |
264 | } | |
265 | ||
266 | sr_input* SigSession::load_input_file_format(const string &filename, | |
267 | function<void (const QString)> error_handler, | |
268 | sr_input_format *format) | |
269 | { | |
270 | struct stat st; | |
271 | sr_input *in; | |
272 | ||
273 | if (!format && !(format = | |
274 | determine_input_file_format(filename.c_str()))) { | |
275 | /* The exact cause was already logged. */ | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | if (stat(filename.c_str(), &st) == -1) { | |
280 | error_handler(tr("Failed to load file")); | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | /* Initialize the input module. */ | |
285 | if (!(in = new sr_input)) { | |
286 | qDebug("Failed to allocate input module.\n"); | |
287 | return NULL; | |
288 | } | |
289 | ||
290 | in->format = format; | |
291 | in->param = NULL; | |
292 | if (in->format->init && | |
293 | in->format->init(in, filename.c_str()) != SR_OK) { | |
294 | qDebug("Input format init failed.\n"); | |
295 | return NULL; | |
296 | } | |
297 | ||
298 | sr_session_new(); | |
299 | ||
300 | if (sr_session_dev_add(in->sdi) != SR_OK) { | |
301 | qDebug("Failed to use device.\n"); | |
302 | sr_session_destroy(); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | return in; | |
307 | } | |
308 | ||
309 | void SigSession::update_signals(const sr_dev_inst *const sdi) | |
310 | { | |
311 | assert(_capture_state == Stopped); | |
312 | ||
313 | shared_ptr<view::Signal> signal; | |
314 | unsigned int logic_probe_count = 0; | |
315 | unsigned int analog_probe_count = 0; | |
316 | ||
317 | // Clear the decode traces | |
318 | _decode_traces.clear(); | |
319 | ||
320 | // Detect what data types we will receive | |
321 | if(sdi) { | |
322 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
323 | const sr_probe *const probe = (const sr_probe *)l->data; | |
324 | if (!probe->enabled) | |
325 | continue; | |
326 | ||
327 | switch(probe->type) { | |
328 | case SR_PROBE_LOGIC: | |
329 | logic_probe_count++; | |
330 | break; | |
331 | ||
332 | case SR_PROBE_ANALOG: | |
333 | analog_probe_count++; | |
334 | break; | |
335 | } | |
336 | } | |
337 | } | |
338 | ||
339 | // Create data containers for the data snapshots | |
340 | { | |
341 | lock_guard<mutex> data_lock(_data_mutex); | |
342 | ||
343 | _logic_data.reset(); | |
344 | if (logic_probe_count != 0) { | |
345 | _logic_data.reset(new data::Logic( | |
346 | logic_probe_count)); | |
347 | assert(_logic_data); | |
348 | } | |
349 | ||
350 | _analog_data.reset(); | |
351 | if (analog_probe_count != 0) { | |
352 | _analog_data.reset(new data::Analog()); | |
353 | assert(_analog_data); | |
354 | } | |
355 | } | |
356 | ||
357 | // Make the Signals list | |
358 | { | |
359 | lock_guard<mutex> lock(_signals_mutex); | |
360 | ||
361 | _signals.clear(); | |
362 | ||
363 | if(sdi) { | |
364 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
365 | const sr_probe *const probe = | |
366 | (const sr_probe *)l->data; | |
367 | assert(probe); | |
368 | ||
369 | switch(probe->type) { | |
370 | case SR_PROBE_LOGIC: | |
371 | signal = shared_ptr<view::Signal>( | |
372 | new view::LogicSignal(*this, probe, | |
373 | _logic_data)); | |
374 | break; | |
375 | ||
376 | case SR_PROBE_ANALOG: | |
377 | signal = shared_ptr<view::Signal>( | |
378 | new view::AnalogSignal(*this, probe, | |
379 | _analog_data)); | |
380 | break; | |
381 | } | |
382 | ||
383 | _signals.push_back(signal); | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | signals_changed(); | |
389 | } | |
390 | ||
391 | bool SigSession::is_trigger_enabled() const | |
392 | { | |
393 | assert(_sdi); | |
394 | for (const GSList *l = _sdi->probes; l; l = l->next) { | |
395 | const sr_probe *const p = (const sr_probe *)l->data; | |
396 | assert(p); | |
397 | if (p->trigger && p->trigger[0] != '\0') | |
398 | return true; | |
399 | } | |
400 | ||
401 | return false; | |
402 | } | |
403 | ||
404 | void SigSession::read_sample_rate(const sr_dev_inst *const sdi) | |
405 | { | |
406 | GVariant *gvar; | |
407 | uint64_t sample_rate = 0; | |
408 | ||
409 | // Read out the sample rate | |
410 | if(sdi->driver) | |
411 | { | |
412 | const int ret = sr_config_get(sdi->driver, | |
413 | SR_CONF_SAMPLERATE, &gvar, sdi); | |
414 | if (ret != SR_OK) { | |
415 | qDebug("Failed to get samplerate\n"); | |
416 | return; | |
417 | } | |
418 | ||
419 | sample_rate = g_variant_get_uint64(gvar); | |
420 | g_variant_unref(gvar); | |
421 | } | |
422 | ||
423 | if(_analog_data) | |
424 | _analog_data->set_samplerate(sample_rate); | |
425 | if(_logic_data) | |
426 | _logic_data->set_samplerate(sample_rate); | |
427 | } | |
428 | ||
429 | void SigSession::load_session_thread_proc( | |
430 | function<void (const QString)> error_handler) | |
431 | { | |
432 | (void)error_handler; | |
433 | ||
434 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
435 | ||
436 | set_capture_state(Running); | |
437 | ||
438 | sr_session_run(); | |
439 | ||
440 | sr_session_destroy(); | |
441 | set_capture_state(Stopped); | |
442 | ||
443 | // Confirm that SR_DF_END was received | |
444 | assert(!_cur_logic_snapshot); | |
445 | assert(!_cur_analog_snapshot); | |
446 | } | |
447 | ||
448 | void SigSession::load_input_thread_proc(const string name, | |
449 | sr_input *in, function<void (const QString)> error_handler) | |
450 | { | |
451 | (void)error_handler; | |
452 | ||
453 | assert(in); | |
454 | assert(in->format); | |
455 | ||
456 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
457 | ||
458 | set_capture_state(Running); | |
459 | ||
460 | in->format->loadfile(in, name.c_str()); | |
461 | ||
462 | sr_session_destroy(); | |
463 | set_capture_state(Stopped); | |
464 | ||
465 | // Confirm that SR_DF_END was received | |
466 | assert(!_cur_logic_snapshot); | |
467 | assert(!_cur_analog_snapshot); | |
468 | ||
469 | delete in; | |
470 | } | |
471 | ||
472 | void SigSession::sample_thread_proc(struct sr_dev_inst *sdi, | |
473 | uint64_t record_length, | |
474 | function<void (const QString)> error_handler) | |
475 | { | |
476 | assert(sdi); | |
477 | assert(error_handler); | |
478 | ||
479 | sr_session_new(); | |
480 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
481 | ||
482 | if (sr_session_dev_add(sdi) != SR_OK) { | |
483 | error_handler(tr("Failed to use device.")); | |
484 | sr_session_destroy(); | |
485 | return; | |
486 | } | |
487 | ||
488 | // Set the sample limit | |
489 | if (sr_config_set(sdi, SR_CONF_LIMIT_SAMPLES, | |
490 | g_variant_new_uint64(record_length)) != SR_OK) { | |
491 | error_handler(tr("Failed to configure " | |
492 | "time-based sample limit.")); | |
493 | sr_session_destroy(); | |
494 | return; | |
495 | } | |
496 | ||
497 | if (sr_session_start() != SR_OK) { | |
498 | error_handler(tr("Failed to start session.")); | |
499 | return; | |
500 | } | |
501 | ||
502 | set_capture_state(is_trigger_enabled() ? AwaitingTrigger : Running); | |
503 | ||
504 | sr_session_run(); | |
505 | sr_session_destroy(); | |
506 | ||
507 | set_capture_state(Stopped); | |
508 | ||
509 | // Confirm that SR_DF_END was received | |
510 | assert(!_cur_logic_snapshot); | |
511 | assert(!_cur_analog_snapshot); | |
512 | } | |
513 | ||
514 | void SigSession::feed_in_header(const sr_dev_inst *sdi) | |
515 | { | |
516 | read_sample_rate(sdi); | |
517 | } | |
518 | ||
519 | void SigSession::feed_in_meta(const sr_dev_inst *sdi, | |
520 | const sr_datafeed_meta &meta) | |
521 | { | |
522 | (void)sdi; | |
523 | ||
524 | for (const GSList *l = meta.config; l; l = l->next) { | |
525 | const sr_config *const src = (const sr_config*)l->data; | |
526 | switch (src->key) { | |
527 | case SR_CONF_SAMPLERATE: | |
528 | /// @todo handle samplerate changes | |
529 | /// samplerate = (uint64_t *)src->value; | |
530 | break; | |
531 | default: | |
532 | // Unknown metadata is not an error. | |
533 | break; | |
534 | } | |
535 | } | |
536 | ||
537 | signals_changed(); | |
538 | } | |
539 | ||
540 | void SigSession::feed_in_logic(const sr_datafeed_logic &logic) | |
541 | { | |
542 | lock_guard<mutex> lock(_data_mutex); | |
543 | ||
544 | if (!_logic_data) | |
545 | { | |
546 | qDebug() << "Unexpected logic packet"; | |
547 | return; | |
548 | } | |
549 | ||
550 | if (!_cur_logic_snapshot) | |
551 | { | |
552 | set_capture_state(Running); | |
553 | ||
554 | // Create a new data snapshot | |
555 | _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>( | |
556 | new data::LogicSnapshot(logic)); | |
557 | _logic_data->push_snapshot(_cur_logic_snapshot); | |
558 | } | |
559 | else | |
560 | { | |
561 | // Append to the existing data snapshot | |
562 | _cur_logic_snapshot->append_payload(logic); | |
563 | } | |
564 | ||
565 | data_updated(); | |
566 | } | |
567 | ||
568 | void SigSession::feed_in_analog(const sr_datafeed_analog &analog) | |
569 | { | |
570 | lock_guard<mutex> lock(_data_mutex); | |
571 | ||
572 | if(!_analog_data) | |
573 | { | |
574 | qDebug() << "Unexpected analog packet"; | |
575 | return; // This analog packet was not expected. | |
576 | } | |
577 | ||
578 | if (!_cur_analog_snapshot) | |
579 | { | |
580 | set_capture_state(Running); | |
581 | ||
582 | // Create a new data snapshot | |
583 | _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>( | |
584 | new data::AnalogSnapshot(analog)); | |
585 | _analog_data->push_snapshot(_cur_analog_snapshot); | |
586 | } | |
587 | else | |
588 | { | |
589 | // Append to the existing data snapshot | |
590 | _cur_analog_snapshot->append_payload(analog); | |
591 | } | |
592 | ||
593 | data_updated(); | |
594 | } | |
595 | ||
596 | void SigSession::data_feed_in(const struct sr_dev_inst *sdi, | |
597 | const struct sr_datafeed_packet *packet) | |
598 | { | |
599 | assert(sdi); | |
600 | assert(packet); | |
601 | ||
602 | switch (packet->type) { | |
603 | case SR_DF_HEADER: | |
604 | feed_in_header(sdi); | |
605 | break; | |
606 | ||
607 | case SR_DF_META: | |
608 | assert(packet->payload); | |
609 | feed_in_meta(sdi, | |
610 | *(const sr_datafeed_meta*)packet->payload); | |
611 | break; | |
612 | ||
613 | case SR_DF_LOGIC: | |
614 | assert(packet->payload); | |
615 | feed_in_logic(*(const sr_datafeed_logic*)packet->payload); | |
616 | break; | |
617 | ||
618 | case SR_DF_ANALOG: | |
619 | assert(packet->payload); | |
620 | feed_in_analog(*(const sr_datafeed_analog*)packet->payload); | |
621 | break; | |
622 | ||
623 | case SR_DF_END: | |
624 | { | |
625 | { | |
626 | lock_guard<mutex> lock(_data_mutex); | |
627 | _cur_logic_snapshot.reset(); | |
628 | _cur_analog_snapshot.reset(); | |
629 | } | |
630 | data_updated(); | |
631 | break; | |
632 | } | |
633 | } | |
634 | } | |
635 | ||
636 | void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi, | |
637 | const struct sr_datafeed_packet *packet, void *cb_data) | |
638 | { | |
639 | (void) cb_data; | |
640 | assert(_session); | |
641 | _session->data_feed_in(sdi, packet); | |
642 | } | |
643 | ||
644 | } // namespace pv |