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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 "data/analog.h" | |
24 | #include "data/analogsnapshot.h" | |
25 | #include "data/logic.h" | |
26 | #include "data/logicsnapshot.h" | |
27 | #include "view/analogsignal.h" | |
28 | #include "view/logicsignal.h" | |
29 | ||
30 | #include <assert.h> | |
31 | ||
32 | #include <QDebug> | |
33 | ||
34 | using namespace boost; | |
35 | using namespace std; | |
36 | ||
37 | namespace pv { | |
38 | ||
39 | // TODO: This should not be necessary | |
40 | SigSession* SigSession::_session = NULL; | |
41 | ||
42 | SigSession::SigSession() : | |
43 | _sdi(NULL), | |
44 | _capture_state(Stopped) | |
45 | { | |
46 | // TODO: This should not be necessary | |
47 | _session = this; | |
48 | } | |
49 | ||
50 | SigSession::~SigSession() | |
51 | { | |
52 | stop_capture(); | |
53 | ||
54 | if (_sampling_thread.get()) | |
55 | _sampling_thread->join(); | |
56 | _sampling_thread.reset(); | |
57 | ||
58 | // TODO: This should not be necessary | |
59 | _session = NULL; | |
60 | } | |
61 | ||
62 | void SigSession::set_device(struct sr_dev_inst *sdi) | |
63 | { | |
64 | if (_sdi) | |
65 | sr_dev_close(_sdi); | |
66 | if (sdi) | |
67 | sr_dev_open(sdi); | |
68 | _sdi = sdi; | |
69 | } | |
70 | ||
71 | void SigSession::load_file(const string &name, | |
72 | function<void (const QString)> error_handler) | |
73 | { | |
74 | stop_capture(); | |
75 | _sampling_thread.reset(new boost::thread( | |
76 | &SigSession::load_thread_proc, this, name, | |
77 | error_handler)); | |
78 | } | |
79 | ||
80 | SigSession::capture_state SigSession::get_capture_state() const | |
81 | { | |
82 | lock_guard<mutex> lock(_sampling_mutex); | |
83 | return _capture_state; | |
84 | } | |
85 | ||
86 | void SigSession::start_capture(uint64_t record_length, | |
87 | function<void (const QString)> error_handler) | |
88 | { | |
89 | stop_capture(); | |
90 | ||
91 | // Check that a device instance has been selected. | |
92 | if (!_sdi) { | |
93 | qDebug() << "No device selected"; | |
94 | return; | |
95 | } | |
96 | ||
97 | // Check that at least one probe is enabled | |
98 | const GSList *l; | |
99 | for (l = _sdi->probes; l; l = l->next) { | |
100 | sr_probe *const probe = (sr_probe*)l->data; | |
101 | assert(probe); | |
102 | if (probe->enabled) | |
103 | break; | |
104 | } | |
105 | ||
106 | if (!l) { | |
107 | error_handler(tr("No probes enabled.")); | |
108 | return; | |
109 | } | |
110 | ||
111 | // Begin the session | |
112 | _sampling_thread.reset(new boost::thread( | |
113 | &SigSession::sample_thread_proc, this, _sdi, | |
114 | record_length, error_handler)); | |
115 | } | |
116 | ||
117 | void SigSession::stop_capture() | |
118 | { | |
119 | if (get_capture_state() == Stopped) | |
120 | return; | |
121 | ||
122 | sr_session_stop(); | |
123 | ||
124 | // Check that sampling stopped | |
125 | if (_sampling_thread.get()) | |
126 | _sampling_thread->join(); | |
127 | _sampling_thread.reset(); | |
128 | } | |
129 | ||
130 | vector< shared_ptr<view::Signal> > SigSession::get_signals() | |
131 | { | |
132 | lock_guard<mutex> lock(_signals_mutex); | |
133 | return _signals; | |
134 | } | |
135 | ||
136 | boost::shared_ptr<data::Logic> SigSession::get_data() | |
137 | { | |
138 | return _logic_data; | |
139 | } | |
140 | ||
141 | void SigSession::set_capture_state(capture_state state) | |
142 | { | |
143 | lock_guard<mutex> lock(_sampling_mutex); | |
144 | _capture_state = state; | |
145 | capture_state_changed(state); | |
146 | } | |
147 | ||
148 | void SigSession::load_thread_proc(const string name, | |
149 | function<void (const QString)> error_handler) | |
150 | { | |
151 | if (sr_session_load(name.c_str()) != SR_OK) { | |
152 | error_handler(tr("Failed to load file.")); | |
153 | return; | |
154 | } | |
155 | ||
156 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
157 | ||
158 | if (sr_session_start() != SR_OK) { | |
159 | error_handler(tr("Failed to start session.")); | |
160 | return; | |
161 | } | |
162 | ||
163 | set_capture_state(Running); | |
164 | ||
165 | sr_session_run(); | |
166 | sr_session_destroy(); | |
167 | ||
168 | set_capture_state(Stopped); | |
169 | ||
170 | // Confirm that SR_DF_END was received | |
171 | assert(!_cur_logic_snapshot); | |
172 | assert(!_cur_analog_snapshot); | |
173 | } | |
174 | ||
175 | void SigSession::sample_thread_proc(struct sr_dev_inst *sdi, | |
176 | uint64_t record_length, | |
177 | function<void (const QString)> error_handler) | |
178 | { | |
179 | assert(sdi); | |
180 | assert(error_handler); | |
181 | ||
182 | sr_session_new(); | |
183 | sr_session_datafeed_callback_add(data_feed_in_proc, NULL); | |
184 | ||
185 | if (sr_session_dev_add(sdi) != SR_OK) { | |
186 | error_handler(tr("Failed to use device.")); | |
187 | sr_session_destroy(); | |
188 | return; | |
189 | } | |
190 | ||
191 | // Set the sample limit | |
192 | if (sr_config_set(sdi, SR_CONF_LIMIT_SAMPLES, | |
193 | g_variant_new_uint64(record_length)) != SR_OK) { | |
194 | error_handler(tr("Failed to configure " | |
195 | "time-based sample limit.")); | |
196 | sr_session_destroy(); | |
197 | return; | |
198 | } | |
199 | ||
200 | if (sr_session_start() != SR_OK) { | |
201 | error_handler(tr("Failed to start session.")); | |
202 | return; | |
203 | } | |
204 | ||
205 | set_capture_state(Running); | |
206 | ||
207 | sr_session_run(); | |
208 | sr_session_destroy(); | |
209 | ||
210 | set_capture_state(Stopped); | |
211 | ||
212 | // Confirm that SR_DF_END was received | |
213 | assert(!_cur_logic_snapshot); | |
214 | assert(!_cur_analog_snapshot); | |
215 | } | |
216 | ||
217 | void SigSession::feed_in_header(const sr_dev_inst *sdi) | |
218 | { | |
219 | shared_ptr<view::Signal> signal; | |
220 | GVariant *gvar; | |
221 | uint64_t sample_rate = 0; | |
222 | unsigned int logic_probe_count = 0; | |
223 | unsigned int analog_probe_count = 0; | |
224 | ||
225 | // Detect what data types we will receive | |
226 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
227 | const sr_probe *const probe = (const sr_probe *)l->data; | |
228 | if (!probe->enabled) | |
229 | continue; | |
230 | ||
231 | switch(probe->type) { | |
232 | case SR_PROBE_LOGIC: | |
233 | logic_probe_count++; | |
234 | break; | |
235 | ||
236 | case SR_PROBE_ANALOG: | |
237 | analog_probe_count++; | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | // Read out the sample rate | |
243 | assert(sdi->driver); | |
244 | ||
245 | const int ret = sr_config_get(sdi->driver, SR_CONF_SAMPLERATE, | |
246 | &gvar, sdi); | |
247 | if (ret != SR_OK) { | |
248 | qDebug("Failed to get samplerate\n"); | |
249 | return; | |
250 | } | |
251 | ||
252 | sample_rate = g_variant_get_uint64(gvar); | |
253 | g_variant_unref(gvar); | |
254 | ||
255 | // Create data containers for the coming data snapshots | |
256 | { | |
257 | lock_guard<mutex> data_lock(_data_mutex); | |
258 | ||
259 | if (logic_probe_count != 0) { | |
260 | _logic_data.reset(new data::Logic( | |
261 | logic_probe_count, sample_rate)); | |
262 | assert(_logic_data); | |
263 | } | |
264 | ||
265 | if (analog_probe_count != 0) { | |
266 | _analog_data.reset(new data::Analog(sample_rate)); | |
267 | assert(_analog_data); | |
268 | } | |
269 | } | |
270 | ||
271 | // Make the logic probe list | |
272 | { | |
273 | lock_guard<mutex> lock(_signals_mutex); | |
274 | ||
275 | _signals.clear(); | |
276 | ||
277 | for (const GSList *l = sdi->probes; l; l = l->next) { | |
278 | const sr_probe *const probe = | |
279 | (const sr_probe *)l->data; | |
280 | assert(probe); | |
281 | if (!probe->enabled) | |
282 | continue; | |
283 | ||
284 | switch(probe->type) { | |
285 | case SR_PROBE_LOGIC: | |
286 | signal = shared_ptr<view::Signal>( | |
287 | new view::LogicSignal(probe->name, | |
288 | _logic_data, probe->index)); | |
289 | break; | |
290 | ||
291 | case SR_PROBE_ANALOG: | |
292 | signal = shared_ptr<view::Signal>( | |
293 | new view::AnalogSignal(probe->name, | |
294 | _analog_data, probe->index)); | |
295 | break; | |
296 | } | |
297 | ||
298 | _signals.push_back(signal); | |
299 | } | |
300 | ||
301 | signals_changed(); | |
302 | } | |
303 | } | |
304 | ||
305 | void SigSession::feed_in_meta(const sr_dev_inst *sdi, | |
306 | const sr_datafeed_meta &meta) | |
307 | { | |
308 | (void)sdi; | |
309 | ||
310 | for (const GSList *l = meta.config; l; l = l->next) { | |
311 | const sr_config *const src = (const sr_config*)l->data; | |
312 | switch (src->key) { | |
313 | case SR_CONF_SAMPLERATE: | |
314 | /// @todo handle samplerate changes | |
315 | /// samplerate = (uint64_t *)src->value; | |
316 | break; | |
317 | default: | |
318 | // Unknown metadata is not an error. | |
319 | break; | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | void SigSession::feed_in_logic(const sr_datafeed_logic &logic) | |
325 | { | |
326 | lock_guard<mutex> lock(_data_mutex); | |
327 | ||
328 | if (!_logic_data) | |
329 | { | |
330 | qDebug() << "Unexpected logic packet"; | |
331 | return; | |
332 | } | |
333 | ||
334 | if (!_cur_logic_snapshot) | |
335 | { | |
336 | // Create a new data snapshot | |
337 | _cur_logic_snapshot = shared_ptr<data::LogicSnapshot>( | |
338 | new data::LogicSnapshot(logic)); | |
339 | _logic_data->push_snapshot(_cur_logic_snapshot); | |
340 | } | |
341 | else | |
342 | { | |
343 | // Append to the existing data snapshot | |
344 | _cur_logic_snapshot->append_payload(logic); | |
345 | } | |
346 | ||
347 | data_updated(); | |
348 | } | |
349 | ||
350 | void SigSession::feed_in_analog(const sr_datafeed_analog &analog) | |
351 | { | |
352 | lock_guard<mutex> lock(_data_mutex); | |
353 | ||
354 | if(!_analog_data) | |
355 | { | |
356 | qDebug() << "Unexpected analog packet"; | |
357 | return; // This analog packet was not expected. | |
358 | } | |
359 | ||
360 | if (!_cur_analog_snapshot) | |
361 | { | |
362 | // Create a new data snapshot | |
363 | _cur_analog_snapshot = shared_ptr<data::AnalogSnapshot>( | |
364 | new data::AnalogSnapshot(analog)); | |
365 | _analog_data->push_snapshot(_cur_analog_snapshot); | |
366 | } | |
367 | else | |
368 | { | |
369 | // Append to the existing data snapshot | |
370 | _cur_analog_snapshot->append_payload(analog); | |
371 | } | |
372 | ||
373 | data_updated(); | |
374 | } | |
375 | ||
376 | void SigSession::data_feed_in(const struct sr_dev_inst *sdi, | |
377 | const struct sr_datafeed_packet *packet) | |
378 | { | |
379 | assert(sdi); | |
380 | assert(packet); | |
381 | ||
382 | switch (packet->type) { | |
383 | case SR_DF_HEADER: | |
384 | feed_in_header(sdi); | |
385 | break; | |
386 | ||
387 | case SR_DF_META: | |
388 | assert(packet->payload); | |
389 | feed_in_meta(sdi, | |
390 | *(const sr_datafeed_meta*)packet->payload); | |
391 | break; | |
392 | ||
393 | case SR_DF_LOGIC: | |
394 | assert(packet->payload); | |
395 | feed_in_logic(*(const sr_datafeed_logic*)packet->payload); | |
396 | break; | |
397 | ||
398 | case SR_DF_ANALOG: | |
399 | assert(packet->payload); | |
400 | feed_in_analog(*(const sr_datafeed_analog*)packet->payload); | |
401 | break; | |
402 | ||
403 | case SR_DF_END: | |
404 | { | |
405 | { | |
406 | lock_guard<mutex> lock(_data_mutex); | |
407 | _cur_logic_snapshot.reset(); | |
408 | _cur_analog_snapshot.reset(); | |
409 | } | |
410 | data_updated(); | |
411 | break; | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | void SigSession::data_feed_in_proc(const struct sr_dev_inst *sdi, | |
417 | const struct sr_datafeed_packet *packet, void *cb_data) | |
418 | { | |
419 | (void) cb_data; | |
420 | assert(_session); | |
421 | _session->data_feed_in(sdi, packet); | |
422 | } | |
423 | ||
424 | } // namespace pv |