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