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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 | #ifdef ENABLE_DECODE | |
22 | #include <libsigrokdecode/libsigrokdecode.h> | |
23 | #endif | |
24 | ||
25 | #include "sigsession.h" | |
26 | ||
27 | #include "devicemanager.h" | |
28 | ||
29 | #include "data/analog.h" | |
30 | #include "data/analogsnapshot.h" | |
31 | #include "data/decoderstack.h" | |
32 | #include "data/logic.h" | |
33 | #include "data/logicsnapshot.h" | |
34 | #include "data/decode/decoder.h" | |
35 | ||
36 | #include "view/analogsignal.h" | |
37 | #include "view/decodetrace.h" | |
38 | #include "view/logicsignal.h" | |
39 | ||
40 | #include <assert.h> | |
41 | ||
42 | #include <stdexcept> | |
43 | ||
44 | #include <boost/foreach.hpp> | |
45 | ||
46 | #include <sys/stat.h> | |
47 | ||
48 | #include <QDebug> | |
49 | ||
50 | using namespace boost; | |
51 | using namespace std; | |
52 | ||
53 | namespace pv { | |
54 | ||
55 | // TODO: This should not be necessary | |
56 | SigSession* SigSession::_session = NULL; | |
57 | ||
58 | SigSession::SigSession(DeviceManager &device_manager) : | |
59 | _device_manager(device_manager), | |
60 | _sdi(NULL), | |
61 | _capture_state(Stopped) | |
62 | { | |
63 | // TODO: This should not be necessary | |
64 | _session = this; | |
65 | } | |
66 | ||
67 | SigSession::~SigSession() | |
68 | { | |
69 | stop_capture(); | |
70 | ||
71 | _sampling_thread.join(); | |
72 | ||
73 | if (_sdi) | |
74 | _device_manager.release_device(_sdi); | |
75 | _sdi = NULL; | |
76 | ||
77 | // TODO: This should not be necessary | |
78 | _session = NULL; | |
79 | } | |
80 | ||
81 | struct sr_dev_inst* SigSession::get_device() const | |
82 | { | |
83 | return _sdi; | |
84 | } | |
85 | ||
86 | void SigSession::set_device(struct sr_dev_inst *sdi) | |
87 | { | |
88 | if (_sdi) | |
89 | _device_manager.release_device(_sdi); | |
90 | if (sdi) | |
91 | _device_manager.use_device(sdi, this); | |
92 | _sdi = sdi; | |
93 | update_signals(sdi); | |
94 | } | |
95 | ||
96 | void SigSession::release_device(struct sr_dev_inst *sdi) | |
97 | { | |
98 | (void)sdi; | |
99 | ||
100 | assert(_capture_state == Stopped); | |
101 | _sdi = NULL; | |
102 | update_signals(NULL); | |
103 | } | |
104 | ||
105 | void SigSession::load_file(const string &name, | |
106 | function<void (const QString)> error_handler) | |
107 | { | |
108 | stop_capture(); | |
109 | ||
110 | if (sr_session_load(name.c_str()) == SR_OK) { | |
111 | GSList *devlist = NULL; | |
112 | sr_session_dev_list(&devlist); | |
113 | ||
114 | if (!devlist || !devlist->data || | |
115 | sr_session_start() != SR_OK) { | |
116 | error_handler(tr("Failed to start session.")); | |
117 | return; | |
118 | } | |
119 | ||
120 | sr_dev_inst *const sdi = (sr_dev_inst*)devlist->data; | |
121 | g_slist_free(devlist); | |
122 | ||
123 | _decode_traces.clear(); | |
124 | update_signals(sdi); | |
125 | read_sample_rate(sdi); | |
126 | ||
127 | _sampling_thread = boost::thread( | |
128 | &SigSession::load_session_thread_proc, this, | |
129 | error_handler); | |
130 | ||
131 | } else { | |
132 | sr_input *in = NULL; | |
133 | ||
134 | if (!(in = load_input_file_format(name.c_str(), | |
135 | error_handler))) | |
136 | return; | |
137 | ||
138 | _decode_traces.clear(); | |
139 | update_signals(in->sdi); | |
140 | read_sample_rate(in->sdi); | |
141 | ||
142 | _sampling_thread = boost::thread( | |
143 | &SigSession::load_input_thread_proc, this, | |
144 | name, in, error_handler); | |
145 | } | |
146 | } | |
147 | ||
148 | SigSession::capture_state SigSession::get_capture_state() const | |
149 | { | |
150 | lock_guard<mutex> lock(_sampling_mutex); | |
151 | return _capture_state; | |
152 | } | |
153 | ||
154 | void SigSession::start_capture(uint64_t record_length, | |
155 | function<void (const QString)> error_handler) | |
156 | { | |
157 | stop_capture(); | |
158 | ||
159 | // Check that a device instance has been selected. | |
160 | if (!_sdi) { | |
161 | qDebug() << "No device selected"; | |
162 | return; | |
163 | } | |
164 | ||
165 | // Check that at least one probe is enabled | |
166 | const GSList *l; | |
167 | for (l = _sdi->probes; l; l = l->next) { | |
168 | sr_probe *const probe = (sr_probe*)l->data; | |
169 | assert(probe); | |
170 | if (probe->enabled) | |
171 | break; | |
172 | } | |
173 | ||
174 | if (!l) { | |
175 | error_handler(tr("No probes enabled.")); | |
176 | return; | |
177 | } | |
178 | ||
179 | // Begin the session | |
180 | _sampling_thread = boost::thread( | |
181 | &SigSession::sample_thread_proc, this, _sdi, | |
182 | record_length, error_handler); | |
183 | } | |
184 | ||
185 | void SigSession::stop_capture() | |
186 | { | |
187 | if (get_capture_state() == Stopped) | |
188 | return; | |
189 | ||
190 | sr_session_stop(); | |
191 | ||
192 | // Check that sampling stopped | |
193 | _sampling_thread.join(); | |
194 | } | |
195 | ||
196 | vector< shared_ptr<view::Signal> > SigSession::get_signals() const | |
197 | { | |
198 | lock_guard<mutex> lock(_signals_mutex); | |
199 | return _signals; | |
200 | } | |
201 | ||
202 | boost::shared_ptr<data::Logic> SigSession::get_data() | |
203 | { | |
204 | return _logic_data; | |
205 | } | |
206 | ||
207 | #ifdef ENABLE_DECODE | |
208 | bool SigSession::add_decoder(srd_decoder *const dec) | |
209 | { | |
210 | map<const srd_probe*, shared_ptr<view::LogicSignal> > probes; | |
211 | shared_ptr<data::DecoderStack> decoder_stack; | |
212 | ||
213 | try | |
214 | { | |
215 | lock_guard<mutex> lock(_signals_mutex); | |
216 | ||
217 | // Create the decoder | |
218 | decoder_stack = shared_ptr<data::DecoderStack>( | |
219 | new data::DecoderStack(dec)); | |
220 | ||
221 | // Auto select the initial probes | |
222 | for(const GSList *i = dec->probes; i; i = i->next) | |
223 | { | |
224 | const srd_probe *const probe = (const srd_probe*)i->data; | |
225 | BOOST_FOREACH(shared_ptr<view::Signal> s, _signals) | |
226 | { | |
227 | shared_ptr<view::LogicSignal> l = | |
228 | dynamic_pointer_cast<view::LogicSignal>(s); | |
229 | if (l && QString::fromUtf8(probe->name). | |
230 | toLower().contains( | |
231 | l->get_name().toLower())) | |
232 | probes[probe] = l; | |
233 | } | |
234 | } | |
235 | ||
236 | assert(decoder_stack); | |
237 | assert(!decoder_stack->stack().empty()); | |
238 | assert(decoder_stack->stack().front()); | |
239 | decoder_stack->stack().front()->set_probes(probes); | |
240 | ||
241 | // Create the decode signal | |
242 | shared_ptr<view::DecodeTrace> d( | |
243 | new view::DecodeTrace(*this, decoder_stack, | |
244 | _decode_traces.size())); | |
245 | _decode_traces.push_back(d); | |
246 | } | |
247 | catch(std::runtime_error e) | |
248 | { | |
249 | return false; | |
250 | } | |
251 | ||
252 | signals_changed(); | |
253 | ||
254 | // Do an initial decode | |
255 | decoder_stack->begin_decode(); | |
256 | ||
257 | return true; | |
258 | } | |
259 | ||
260 | vector< shared_ptr<view::DecodeTrace> > SigSession::get_decode_signals() const | |
261 | { | |
262 | lock_guard<mutex> lock(_signals_mutex); | |
263 | return _decode_traces; | |
264 | } | |
265 | ||
266 | void SigSession::remove_decode_signal(view::DecodeTrace *signal) | |
267 | { | |
268 | for (vector< shared_ptr<view::DecodeTrace> >::iterator i = | |
269 | _decode_traces.begin(); | |
270 | i != _decode_traces.end(); | |
271 | i++) | |
272 | if ((*i).get() == signal) | |
273 | { | |
274 | _decode_traces.erase(i); | |
275 | signals_changed(); | |
276 | return; | |
277 | } | |
278 | } | |
279 | #endif | |
280 | ||
281 | void SigSession::set_capture_state(capture_state state) | |
282 | { | |
283 | lock_guard<mutex> lock(_sampling_mutex); | |
284 | const bool changed = _capture_state != state; | |
285 | _capture_state = state; | |
286 | if(changed) | |
287 | capture_state_changed(state); | |
288 | } | |
289 | ||
290 | /** | |
291 | * Attempts to autodetect the format. Failing that | |
292 | * @param filename The filename of the input file. | |
293 | * @return A pointer to the 'struct sr_input_format' that should be used, | |
294 | * or NULL if no input format was selected or auto-detected. | |
295 | */ | |
296 | sr_input_format* SigSession::determine_input_file_format( | |
297 | const string &filename) | |
298 | { | |
299 | int i; | |
300 | ||
301 | /* If there are no input formats, return NULL right away. */ | |
302 | sr_input_format *const *const inputs = sr_input_list(); | |
303 | if (!inputs) { | |
304 | g_critical("No supported input formats available."); | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | /* Otherwise, try to find an input module that can handle this file. */ | |
309 | for (i = 0; inputs[i]; i++) { | |
310 | if (inputs[i]->format_match(filename.c_str())) | |
311 | break; | |
312 | } | |
313 | ||
314 | /* Return NULL if no input module wanted to touch this. */ | |
315 | if (!inputs[i]) { | |
316 | g_critical("Error: no matching input module found."); | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | return inputs[i]; | |
321 | } | |
322 | ||
323 | sr_input* SigSession::load_input_file_format(const string &filename, | |
324 | function<void (const QString)> error_handler, | |
325 | sr_input_format *format) | |
326 | { | |
327 | struct stat st; | |
328 | sr_input *in; | |
329 | ||
330 | if (!format && !(format = | |
331 | determine_input_file_format(filename.c_str()))) { | |
332 | /* The exact cause was already logged. */ | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | if (stat(filename.c_str(), &st) == -1) { | |
337 | error_handler(tr("Failed to load file")); | |
338 | return NULL; | |
339 | } | |
340 | ||
341 | /* Initialize the input module. */ | |
342 | if (!(in = new sr_input)) { | |
343 | qDebug("Failed to allocate input module.\n"); | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | in->format = format; | |
348 | in->param = NULL; | |
349 | if (in->format->init && | |
350 | in->format->init(in, filename.c_str()) != SR_OK) { | |
351 | qDebug("Input format init failed.\n"); | |
352 | return NULL; | |
353 | } | |
354 | ||
355 | sr_session_new(); | |
356 | ||
357 | if (sr_session_dev_add(in->sdi) != SR_OK) { | |
358 | qDebug("Failed to use device.\n"); | |
359 | sr_session_destroy(); | |
360 | return NULL; | |
361 | } | |
362 | ||
363 | return in; | |
364 | } | |
365 | ||
366 | void SigSession::update_signals(const sr_dev_inst *const sdi) | |
367 | { | |
368 | assert(_capture_state == Stopped); | |
369 | ||
370 | shared_ptr<view::Signal> signal; | |
371 | unsigned int logic_probe_count = 0; | |
372 | unsigned int analog_probe_count = 0; | |
373 | ||
374 | // Clear the decode traces | |
375 | _decode_traces.clear(); | |
376 | ||
377 | // Detect what data types we will receive | |
378 | if(sdi) { | |
379 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
380 | const sr_probe *const probe = (const sr_probe *)l->data; | |
381 | if (!probe->enabled) | |
382 | continue; | |
383 | ||
384 | switch(probe->type) { | |
385 | case SR_PROBE_LOGIC: | |
386 | logic_probe_count++; | |
387 | break; | |
388 | ||
389 | case SR_PROBE_ANALOG: | |
390 | analog_probe_count++; | |
391 | break; | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
396 | // Create data containers for the data snapshots | |
397 | { | |
398 | lock_guard<mutex> data_lock(_data_mutex); | |
399 | ||
400 | _logic_data.reset(); | |
401 | if (logic_probe_count != 0) { | |
402 | _logic_data.reset(new data::Logic( | |
403 | logic_probe_count)); | |
404 | assert(_logic_data); | |
405 | } | |
406 | ||
407 | _analog_data.reset(); | |
408 | if (analog_probe_count != 0) { | |
409 | _analog_data.reset(new data::Analog()); | |
410 | assert(_analog_data); | |
411 | } | |
412 | } | |
413 | ||
414 | // Make the Signals list | |
415 | { | |
416 | lock_guard<mutex> lock(_signals_mutex); | |
417 | ||
418 | _signals.clear(); | |
419 | ||
420 | if(sdi) { | |
421 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
422 | sr_probe *const probe = (sr_probe *)l->data; | |
423 | assert(probe); | |
424 | ||
425 | switch(probe->type) { | |
426 | case SR_PROBE_LOGIC: | |
427 | signal = shared_ptr<view::Signal>( | |
428 | new view::LogicSignal(*this, probe, | |
429 | _logic_data)); | |
430 | break; | |
431 | ||
432 | case SR_PROBE_ANALOG: | |
433 | signal = shared_ptr<view::Signal>( | |
434 | new view::AnalogSignal(*this, probe, | |
435 | _analog_data)); | |
436 | break; | |
437 | } | |
438 | ||
439 | _signals.push_back(signal); | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
444 | signals_changed(); | |
445 | } | |
446 | ||
447 | bool SigSession::is_trigger_enabled() const | |
448 | { | |
449 | assert(_sdi); | |
450 | for (const GSList *l = _sdi->probes; l; l = l->next) { | |
451 | const sr_probe *const p = (const sr_probe *)l->data; | |
452 | assert(p); | |
453 | if (p->trigger && p->trigger[0] != '\0') | |
454 | return true; | |
455 | } | |
456 | ||
457 | return false; | |
458 | } | |
459 | ||
460 | void SigSession::read_sample_rate(const sr_dev_inst *const sdi) | |
461 | { | |
462 | GVariant *gvar; | |
463 | uint64_t sample_rate = 0; | |
464 | ||
465 | // Read out the sample rate | |
466 | if(sdi->driver) | |
467 | { | |
468 | const int ret = sr_config_get(sdi->driver, sdi, NULL, | |
469 | SR_CONF_SAMPLERATE, &gvar); | |
470 | if (ret != SR_OK) { | |
471 | qDebug("Failed to get samplerate\n"); | |
472 | return; | |
473 | } | |
474 | ||
475 | sample_rate = g_variant_get_uint64(gvar); | |
476 | g_variant_unref(gvar); | |
477 | } | |
478 | ||
479 | if(_analog_data) | |
480 | _analog_data->set_samplerate(sample_rate); | |
481 | if(_logic_data) | |
482 | _logic_data->set_samplerate(sample_rate); | |
483 | } | |
484 | ||
485 | void SigSession::load_session_thread_proc( | |
486 | function<void (const QString)> error_handler) | |
487 | { | |
488 | (void)error_handler; | |
489 | ||
490 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
491 | ||
492 | set_capture_state(Running); | |
493 | ||
494 | sr_session_run(); | |
495 | ||
496 | sr_session_destroy(); | |
497 | set_capture_state(Stopped); | |
498 | ||
499 | // Confirm that SR_DF_END was received | |
500 | assert(!_cur_logic_snapshot); | |
501 | assert(!_cur_analog_snapshot); | |
502 | } | |
503 | ||
504 | void SigSession::load_input_thread_proc(const string name, | |
505 | sr_input *in, function<void (const QString)> error_handler) | |
506 | { | |
507 | (void)error_handler; | |
508 | ||
509 | assert(in); | |
510 | assert(in->format); | |
511 | ||
512 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
513 | ||
514 | set_capture_state(Running); | |
515 | ||
516 | in->format->loadfile(in, name.c_str()); | |
517 | ||
518 | sr_session_destroy(); | |
519 | set_capture_state(Stopped); | |
520 | ||
521 | // Confirm that SR_DF_END was received | |
522 | assert(!_cur_logic_snapshot); | |
523 | assert(!_cur_analog_snapshot); | |
524 | ||
525 | delete in; | |
526 | } | |
527 | ||
528 | void SigSession::sample_thread_proc(struct sr_dev_inst *sdi, | |
529 | uint64_t record_length, | |
530 | function<void (const QString)> error_handler) | |
531 | { | |
532 | assert(sdi); | |
533 | assert(error_handler); | |
534 | ||
535 | sr_session_new(); | |
536 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
537 | ||
538 | if (sr_session_dev_add(sdi) != SR_OK) { | |
539 | error_handler(tr("Failed to use device.")); | |
540 | sr_session_destroy(); | |
541 | return; | |
542 | } | |
543 | ||
544 | // Set the sample limit | |
545 | if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, | |
546 | g_variant_new_uint64(record_length)) != SR_OK) { | |
547 | error_handler(tr("Failed to configure " | |
548 | "time-based sample limit.")); | |
549 | sr_session_destroy(); | |
550 | return; | |
551 | } | |
552 | ||
553 | if (sr_session_start() != SR_OK) { | |
554 | error_handler(tr("Failed to start session.")); | |
555 | return; | |
556 | } | |
557 | ||
558 | set_capture_state(is_trigger_enabled() ? AwaitingTrigger : Running); | |
559 | ||
560 | sr_session_run(); | |
561 | sr_session_destroy(); | |
562 | ||
563 | set_capture_state(Stopped); | |
564 | ||
565 | // Confirm that SR_DF_END was received | |
566 | assert(!_cur_logic_snapshot); | |
567 | assert(!_cur_analog_snapshot); | |
568 | } | |
569 | ||
570 | void SigSession::feed_in_header(const sr_dev_inst *sdi) | |
571 | { | |
572 | read_sample_rate(sdi); | |
573 | } | |
574 | ||
575 | void SigSession::feed_in_meta(const sr_dev_inst *sdi, | |
576 | const sr_datafeed_meta &meta) | |
577 | { | |
578 | (void)sdi; | |
579 | ||
580 | for (const GSList *l = meta.config; l; l = l->next) { | |
581 | const sr_config *const src = (const sr_config*)l->data; | |
582 | switch (src->key) { | |
583 | case SR_CONF_SAMPLERATE: | |
584 | /// @todo handle samplerate changes | |
585 | /// samplerate = (uint64_t *)src->value; | |
586 | break; | |
587 | default: | |
588 | // Unknown metadata is not an error. | |
589 | break; | |
590 | } | |
591 | } | |
592 | ||
593 | signals_changed(); | |
594 | } | |
595 | ||
596 | void SigSession::feed_in_logic(const sr_datafeed_logic &logic) | |
597 | { | |
598 | lock_guard<mutex> lock(_data_mutex); | |
599 | ||
600 | if (!_logic_data) | |
601 | { | |
602 | qDebug() << "Unexpected logic packet"; | |
603 | return; | |
604 | } | |
605 | ||
606 | if (!_cur_logic_snapshot) | |
607 | { | |
608 | set_capture_state(Running); | |
609 | ||
610 | // Create a new data snapshot | |
611 | _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>( | |
612 | new data::LogicSnapshot(logic)); | |
613 | _logic_data->push_snapshot(_cur_logic_snapshot); | |
614 | } | |
615 | else | |
616 | { | |
617 | // Append to the existing data snapshot | |
618 | _cur_logic_snapshot->append_payload(logic); | |
619 | } | |
620 | ||
621 | data_updated(); | |
622 | } | |
623 | ||
624 | void SigSession::feed_in_analog(const sr_datafeed_analog &analog) | |
625 | { | |
626 | lock_guard<mutex> lock(_data_mutex); | |
627 | ||
628 | if(!_analog_data) | |
629 | { | |
630 | qDebug() << "Unexpected analog packet"; | |
631 | return; // This analog packet was not expected. | |
632 | } | |
633 | ||
634 | if (!_cur_analog_snapshot) | |
635 | { | |
636 | set_capture_state(Running); | |
637 | ||
638 | // Create a new data snapshot | |
639 | _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>( | |
640 | new data::AnalogSnapshot(analog)); | |
641 | _analog_data->push_snapshot(_cur_analog_snapshot); | |
642 | } | |
643 | else | |
644 | { | |
645 | // Append to the existing data snapshot | |
646 | _cur_analog_snapshot->append_payload(analog); | |
647 | } | |
648 | ||
649 | data_updated(); | |
650 | } | |
651 | ||
652 | void SigSession::data_feed_in(const struct sr_dev_inst *sdi, | |
653 | const struct sr_datafeed_packet *packet) | |
654 | { | |
655 | assert(sdi); | |
656 | assert(packet); | |
657 | ||
658 | switch (packet->type) { | |
659 | case SR_DF_HEADER: | |
660 | feed_in_header(sdi); | |
661 | break; | |
662 | ||
663 | case SR_DF_META: | |
664 | assert(packet->payload); | |
665 | feed_in_meta(sdi, | |
666 | *(const sr_datafeed_meta*)packet->payload); | |
667 | break; | |
668 | ||
669 | case SR_DF_LOGIC: | |
670 | assert(packet->payload); | |
671 | feed_in_logic(*(const sr_datafeed_logic*)packet->payload); | |
672 | break; | |
673 | ||
674 | case SR_DF_ANALOG: | |
675 | assert(packet->payload); | |
676 | feed_in_analog(*(const sr_datafeed_analog*)packet->payload); | |
677 | break; | |
678 | ||
679 | case SR_DF_END: | |
680 | { | |
681 | { | |
682 | lock_guard<mutex> lock(_data_mutex); | |
683 | _cur_logic_snapshot.reset(); | |
684 | _cur_analog_snapshot.reset(); | |
685 | } | |
686 | data_updated(); | |
687 | break; | |
688 | } | |
689 | } | |
690 | } | |
691 | ||
692 | void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi, | |
693 | const struct sr_datafeed_packet *packet, void *cb_data) | |
694 | { | |
695 | (void) cb_data; | |
696 | assert(_session); | |
697 | _session->data_feed_in(sdi, packet); | |
698 | } | |
699 | ||
700 | } // namespace pv |