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