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