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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013-2014 Martin Ling <martin-sigrok@earth.li> | |
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 3 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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | /** | |
21 | ||
22 | @mainpage API Reference | |
23 | ||
24 | Introduction | |
25 | ------------ | |
26 | ||
27 | The sigrok++ API provides an object-oriented C++ interface to the functionality | |
28 | in libsigrok, including automatic memory and resource management. | |
29 | ||
30 | It is built on top of the public libsigrok C API, and is designed to be used as | |
31 | a standalone alternative API. Programs should not mix usage of the C and C++ | |
32 | APIs; the C++ interface code needs to have full control of all C API calls for | |
33 | resources to be managed correctly. | |
34 | ||
35 | Memory management | |
36 | ----------------- | |
37 | ||
38 | All runtime objects created through the C++ API are passed and accessed via | |
39 | shared pointers, using the C++11 std::shared_ptr implementation. This means | |
40 | that a reference count is kept for each object. | |
41 | ||
42 | Shared pointers can be copied and assigned in a user's program, automatically | |
43 | updating their reference count and deleting objects when they are no longer in | |
44 | use. The C++ interface code also keeps track of internal dependencies between | |
45 | libsigrok resources, and ensures that objects are not prematurely deleted when | |
46 | their resources are in use by other objects. | |
47 | ||
48 | This means that management of sigrok++ objects and their underlying libsigrok | |
49 | resources can be treated as fully automatic. As long as all shared pointers to | |
50 | objects are deleted or reassigned when no longer in use, all underlying | |
51 | resources will be released at the right time. | |
52 | ||
53 | Getting started | |
54 | --------------- | |
55 | ||
56 | Usage of the C++ API needs to begin with a call to sigrok::Context::create(). | |
57 | This will create the global libsigrok context and returns a shared pointer to | |
58 | the sigrok::Context object. Methods on this object provide access to the | |
59 | hardware drivers, input and output formats supported by the library, as well | |
60 | as means of creating other objects such as sessions and triggers. | |
61 | ||
62 | Error handling | |
63 | -------------- | |
64 | ||
65 | When any libsigrok C API call returns an error, a sigrok::Error exception is | |
66 | raised, which provides access to the error code and description. | |
67 | ||
68 | */ | |
69 | ||
70 | #ifndef LIBSIGROK_HPP | |
71 | #define LIBSIGROK_HPP | |
72 | ||
73 | #include "libsigrok/libsigrok.h" | |
74 | #include <glibmm-2.4/glibmm.h> | |
75 | ||
76 | #include <stdexcept> | |
77 | #include <memory> | |
78 | #include <vector> | |
79 | #include <map> | |
80 | ||
81 | namespace sigrok | |
82 | { | |
83 | ||
84 | using namespace std; | |
85 | ||
86 | /* Forward declarations */ | |
87 | class SR_API Error; | |
88 | class SR_API Context; | |
89 | class SR_API Driver; | |
90 | class SR_API Device; | |
91 | class SR_API HardwareDevice; | |
92 | class SR_API Channel; | |
93 | class SR_API EventSource; | |
94 | class SR_API Session; | |
95 | class SR_API ConfigKey; | |
96 | class SR_API InputFormat; | |
97 | class SR_API OutputFormat; | |
98 | class SR_API LogLevel; | |
99 | class SR_API ChannelGroup; | |
100 | class SR_API Trigger; | |
101 | class SR_API TriggerStage; | |
102 | class SR_API TriggerMatch; | |
103 | class SR_API TriggerMatchType; | |
104 | class SR_API ChannelType; | |
105 | class SR_API Packet; | |
106 | class SR_API PacketPayload; | |
107 | class SR_API PacketType; | |
108 | class SR_API Quantity; | |
109 | class SR_API Unit; | |
110 | class SR_API QuantityFlag; | |
111 | class SR_API Input; | |
112 | class SR_API InputDevice; | |
113 | class SR_API Output; | |
114 | class SR_API DataType; | |
115 | class SR_API Option; | |
116 | ||
117 | /** Exception thrown when an error code is returned by any libsigrok call. */ | |
118 | class SR_API Error: public exception | |
119 | { | |
120 | public: | |
121 | Error(int result); | |
122 | ~Error() throw(); | |
123 | const int result; | |
124 | const char *what() const throw(); | |
125 | }; | |
126 | ||
127 | /* Base template for classes whose resources are owned by a parent object. */ | |
128 | template <class Class, class Parent, typename Struct> | |
129 | class SR_API ParentOwned | |
130 | { | |
131 | protected: | |
132 | /* Parent object which owns this child object's underlying structure. | |
133 | ||
134 | This shared pointer will be null when this child is unused, but | |
135 | will be assigned to point to the parent before any shared pointer | |
136 | to this child is handed out to the user. | |
137 | ||
138 | When the reference count of this child falls to zero, this shared | |
139 | pointer to its parent is reset by a custom deleter on the child's | |
140 | shared pointer. | |
141 | ||
142 | This strategy ensures that the destructors for both the child and | |
143 | the parent are called at the correct time, i.e. only when all | |
144 | references to both the parent and all its children are gone. */ | |
145 | shared_ptr<Parent> _parent; | |
146 | ||
147 | /* Weak pointer for shared_from_this() implementation. */ | |
148 | weak_ptr<Class> _weak_this; | |
149 | ||
150 | public: | |
151 | /* Note, this implementation will create a new smart_ptr if none exists. */ | |
152 | shared_ptr<Class> shared_from_this() | |
153 | { | |
154 | shared_ptr<Class> shared; | |
155 | ||
156 | if (!(shared = _weak_this.lock())) | |
157 | { | |
158 | shared = shared_ptr<Class>((Class *) this, reset_parent); | |
159 | _weak_this = shared; | |
160 | } | |
161 | ||
162 | return shared; | |
163 | } | |
164 | ||
165 | shared_ptr<Class> get_shared_pointer(shared_ptr<Parent> parent) | |
166 | { | |
167 | if (!parent) | |
168 | throw Error(SR_ERR_BUG); | |
169 | this->_parent = parent; | |
170 | return shared_from_this(); | |
171 | } | |
172 | ||
173 | shared_ptr<Class> get_shared_pointer(Parent *parent) | |
174 | { | |
175 | if (!parent) | |
176 | throw Error(SR_ERR_BUG); | |
177 | return get_shared_pointer(parent->shared_from_this()); | |
178 | } | |
179 | protected: | |
180 | static void reset_parent(Class *object) | |
181 | { | |
182 | if (!object->_parent) | |
183 | throw Error(SR_ERR_BUG); | |
184 | object->_parent.reset(); | |
185 | } | |
186 | ||
187 | Struct *_structure; | |
188 | ||
189 | ParentOwned<Class, Parent, Struct>(Struct *structure) : | |
190 | _structure(structure) | |
191 | { | |
192 | } | |
193 | }; | |
194 | ||
195 | /* Base template for classes whose resources are owned by the user. */ | |
196 | template <class Class, typename Struct> | |
197 | class SR_API UserOwned : public enable_shared_from_this<Class> | |
198 | { | |
199 | public: | |
200 | shared_ptr<Class> shared_from_this() | |
201 | { | |
202 | auto shared = enable_shared_from_this<Class>::shared_from_this(); | |
203 | if (!shared) | |
204 | throw Error(SR_ERR_BUG); | |
205 | return shared; | |
206 | } | |
207 | protected: | |
208 | Struct *_structure; | |
209 | ||
210 | UserOwned<Class, Struct>(Struct *structure) : | |
211 | _structure(structure) | |
212 | { | |
213 | } | |
214 | ||
215 | /* Deleter needed to allow shared_ptr use with protected destructor. */ | |
216 | class Deleter | |
217 | { | |
218 | public: | |
219 | void operator()(Class *object) { delete object; } | |
220 | }; | |
221 | }; | |
222 | ||
223 | /** Type of log callback */ | |
224 | typedef function<void(const LogLevel *, string message)> LogCallbackFunction; | |
225 | ||
226 | /** The global libsigrok context */ | |
227 | class SR_API Context : public UserOwned<Context, struct sr_context> | |
228 | { | |
229 | public: | |
230 | /** Create new context */ | |
231 | static shared_ptr<Context> create(); | |
232 | /** libsigrok package version. */ | |
233 | string package_version(); | |
234 | /** libsigrok library version. */ | |
235 | string lib_version(); | |
236 | /** Available hardware drivers, indexed by name. */ | |
237 | map<string, shared_ptr<Driver> > drivers(); | |
238 | /** Available input formats, indexed by name. */ | |
239 | map<string, shared_ptr<InputFormat> > input_formats(); | |
240 | /** Available output formats, indexed by name. */ | |
241 | map<string, shared_ptr<OutputFormat> > output_formats(); | |
242 | /** Current log level. */ | |
243 | const LogLevel *log_level(); | |
244 | /** Set the log level. | |
245 | * @param level LogLevel to use. */ | |
246 | void set_log_level(const LogLevel *level); | |
247 | /** Current log domain. */ | |
248 | string log_domain(); | |
249 | /** Set the log domain. | |
250 | * @param value Log domain prefix string. */ | |
251 | void set_log_domain(string value); | |
252 | /** Set the log callback. | |
253 | * @param callback Callback of the form callback(LogLevel, string). */ | |
254 | void set_log_callback(LogCallbackFunction callback); | |
255 | /** Set the log callback to the default handler. */ | |
256 | void set_log_callback_default(); | |
257 | /** Create a new session. */ | |
258 | shared_ptr<Session> create_session(); | |
259 | /** Load a saved session. | |
260 | * @param filename File name string. */ | |
261 | shared_ptr<Session> load_session(string filename); | |
262 | /** Create a new trigger. | |
263 | * @param name Name string for new trigger. */ | |
264 | shared_ptr<Trigger> create_trigger(string name); | |
265 | /** Open an input file. | |
266 | * @param filename File name string. */ | |
267 | shared_ptr<Input> open_file(string filename); | |
268 | /** Open an input stream based on header data. | |
269 | * @param header Initial data from stream. */ | |
270 | shared_ptr<Input> open_stream(string header); | |
271 | protected: | |
272 | map<string, Driver *> _drivers; | |
273 | map<string, InputFormat *> _input_formats; | |
274 | map<string, OutputFormat *> _output_formats; | |
275 | Session *_session; | |
276 | LogCallbackFunction _log_callback; | |
277 | Context(); | |
278 | ~Context(); | |
279 | friend class Deleter; | |
280 | friend class Session; | |
281 | friend class Driver; | |
282 | }; | |
283 | ||
284 | /** An object that can be configured. */ | |
285 | class SR_API Configurable | |
286 | { | |
287 | public: | |
288 | /** Read configuration for the given key. | |
289 | * @param key ConfigKey to read. */ | |
290 | Glib::VariantBase config_get(const ConfigKey *key); | |
291 | /** Set configuration for the given key to a specified value. | |
292 | * @param key ConfigKey to set. | |
293 | * @param value Value to set. */ | |
294 | void config_set(const ConfigKey *key, Glib::VariantBase value); | |
295 | /** Enumerate available values for the given configuration key. | |
296 | * @param key ConfigKey to enumerate values for. */ | |
297 | Glib::VariantContainerBase config_list(const ConfigKey *key); | |
298 | /** Enumerate available keys, according to a given index key. */ | |
299 | vector<const ConfigKey *> config_keys(const ConfigKey *key); | |
300 | /** Check for a key in the list from a given index key. */ | |
301 | bool config_check(const ConfigKey *key, const ConfigKey *index_key); | |
302 | protected: | |
303 | Configurable( | |
304 | struct sr_dev_driver *driver, | |
305 | struct sr_dev_inst *sdi, | |
306 | struct sr_channel_group *channel_group); | |
307 | virtual ~Configurable(); | |
308 | struct sr_dev_driver *config_driver; | |
309 | struct sr_dev_inst *config_sdi; | |
310 | struct sr_channel_group *config_channel_group; | |
311 | }; | |
312 | ||
313 | /** A hardware driver provided by the library */ | |
314 | class SR_API Driver : | |
315 | public ParentOwned<Driver, Context, struct sr_dev_driver>, | |
316 | public Configurable | |
317 | { | |
318 | public: | |
319 | /** Name of this driver. */ | |
320 | string name(); | |
321 | /** Long name for this driver. */ | |
322 | string long_name(); | |
323 | /** Scan for devices and return a list of devices found. | |
324 | * @param options Mapping of (ConfigKey, value) pairs. */ | |
325 | vector<shared_ptr<HardwareDevice> > scan( | |
326 | map<const ConfigKey *, Glib::VariantBase> options = | |
327 | map<const ConfigKey *, Glib::VariantBase>()); | |
328 | protected: | |
329 | bool _initialized; | |
330 | vector<HardwareDevice *> _devices; | |
331 | Driver(struct sr_dev_driver *structure); | |
332 | ~Driver(); | |
333 | friend class Context; | |
334 | friend class HardwareDevice; | |
335 | friend class ChannelGroup; | |
336 | }; | |
337 | ||
338 | /** A generic device, either hardware or virtual */ | |
339 | class SR_API Device : public Configurable | |
340 | { | |
341 | public: | |
342 | /** Description identifying this device. */ | |
343 | string description(); | |
344 | /** Vendor name for this device. */ | |
345 | string vendor(); | |
346 | /** Model name for this device. */ | |
347 | string model(); | |
348 | /** Version string for this device. */ | |
349 | string version(); | |
350 | /** List of the channels available on this device. */ | |
351 | vector<shared_ptr<Channel> > channels(); | |
352 | /** Channel groups available on this device, indexed by name. */ | |
353 | map<string, shared_ptr<ChannelGroup> > channel_groups(); | |
354 | /** Open device. */ | |
355 | void open(); | |
356 | /** Close device. */ | |
357 | void close(); | |
358 | protected: | |
359 | Device(struct sr_dev_inst *structure); | |
360 | ~Device(); | |
361 | virtual shared_ptr<Device> get_shared_from_this() = 0; | |
362 | shared_ptr<Channel> get_channel(struct sr_channel *ptr); | |
363 | struct sr_dev_inst *_structure; | |
364 | map<struct sr_channel *, Channel *> _channels; | |
365 | map<string, ChannelGroup *> _channel_groups; | |
366 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
367 | class Deleter | |
368 | { | |
369 | public: | |
370 | void operator()(Device *device) { delete device; } | |
371 | }; | |
372 | friend class Deleter; | |
373 | friend class Session; | |
374 | friend class Channel; | |
375 | friend class ChannelGroup; | |
376 | friend class Output; | |
377 | friend class Analog; | |
378 | }; | |
379 | ||
380 | /** A real hardware device, connected via a driver */ | |
381 | class SR_API HardwareDevice : | |
382 | public ParentOwned<HardwareDevice, Context, struct sr_dev_inst>, | |
383 | public Device | |
384 | { | |
385 | public: | |
386 | /** Driver providing this device. */ | |
387 | shared_ptr<Driver> driver(); | |
388 | protected: | |
389 | HardwareDevice(Driver *driver, struct sr_dev_inst *structure); | |
390 | ~HardwareDevice(); | |
391 | shared_ptr<Device> get_shared_from_this(); | |
392 | Driver *_driver; | |
393 | friend class Driver; | |
394 | friend class ChannelGroup; | |
395 | }; | |
396 | ||
397 | /** A channel on a device */ | |
398 | class SR_API Channel : | |
399 | public ParentOwned<Channel, Device, struct sr_channel> | |
400 | { | |
401 | public: | |
402 | /** Current name of this channel. */ | |
403 | string name(); | |
404 | /** Set the name of this channel. * | |
405 | * @param name Name string to set. */ | |
406 | void set_name(string name); | |
407 | /** Type of this channel. */ | |
408 | const ChannelType *type(); | |
409 | /** Enabled status of this channel. */ | |
410 | bool enabled(); | |
411 | /** Set the enabled status of this channel. | |
412 | * @param value Boolean value to set. */ | |
413 | void set_enabled(bool value); | |
414 | /** Get the index number of this channel. */ | |
415 | unsigned int index(); | |
416 | protected: | |
417 | Channel(struct sr_channel *structure); | |
418 | ~Channel(); | |
419 | const ChannelType * const _type; | |
420 | friend class Device; | |
421 | friend class ChannelGroup; | |
422 | friend class Session; | |
423 | friend class TriggerStage; | |
424 | }; | |
425 | ||
426 | /** A group of channels on a device, which share some configuration */ | |
427 | class SR_API ChannelGroup : | |
428 | public ParentOwned<ChannelGroup, Device, struct sr_channel_group>, | |
429 | public Configurable | |
430 | { | |
431 | public: | |
432 | /** Name of this channel group. */ | |
433 | string name(); | |
434 | /** List of the channels in this group. */ | |
435 | vector<shared_ptr<Channel> > channels(); | |
436 | protected: | |
437 | ChannelGroup(Device *device, struct sr_channel_group *structure); | |
438 | ~ChannelGroup(); | |
439 | vector<Channel *> _channels; | |
440 | friend class Device; | |
441 | }; | |
442 | ||
443 | /** A trigger configuration */ | |
444 | class SR_API Trigger : public UserOwned<Trigger, struct sr_trigger> | |
445 | { | |
446 | public: | |
447 | /** Name of this trigger configuration. */ | |
448 | string name(); | |
449 | /** List of the stages in this trigger. */ | |
450 | vector<shared_ptr<TriggerStage> > stages(); | |
451 | /** Add a new stage to this trigger. */ | |
452 | shared_ptr<TriggerStage> add_stage(); | |
453 | protected: | |
454 | Trigger(shared_ptr<Context> context, string name); | |
455 | ~Trigger(); | |
456 | shared_ptr<Context> _context; | |
457 | vector<TriggerStage *> _stages; | |
458 | friend class Deleter; | |
459 | friend class Context; | |
460 | friend class Session; | |
461 | }; | |
462 | ||
463 | /** A stage in a trigger configuration */ | |
464 | class SR_API TriggerStage : | |
465 | public ParentOwned<TriggerStage, Trigger, struct sr_trigger_stage> | |
466 | { | |
467 | public: | |
468 | /** Index number of this stage. */ | |
469 | int number(); | |
470 | /** List of match conditions on this stage. */ | |
471 | vector<shared_ptr<TriggerMatch> > matches(); | |
472 | /** Add a new match condition to this stage. | |
473 | * @param channel Channel to match on. | |
474 | * @param type TriggerMatchType to apply. */ | |
475 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type); | |
476 | /** Add a new match condition to this stage. | |
477 | * @param channel Channel to match on. | |
478 | * @param type TriggerMatchType to apply. | |
479 | * @param value Threshold value. */ | |
480 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type, float value); | |
481 | protected: | |
482 | vector<TriggerMatch *> _matches; | |
483 | TriggerStage(struct sr_trigger_stage *structure); | |
484 | ~TriggerStage(); | |
485 | friend class Trigger; | |
486 | }; | |
487 | ||
488 | /** A match condition in a trigger configuration */ | |
489 | class SR_API TriggerMatch : | |
490 | public ParentOwned<TriggerMatch, TriggerStage, struct sr_trigger_match> | |
491 | { | |
492 | public: | |
493 | /** Channel this condition matches on. */ | |
494 | shared_ptr<Channel> channel(); | |
495 | /** Type of match. */ | |
496 | const TriggerMatchType *type(); | |
497 | /** Threshold value. */ | |
498 | float value(); | |
499 | protected: | |
500 | TriggerMatch(struct sr_trigger_match *structure, shared_ptr<Channel> channel); | |
501 | ~TriggerMatch(); | |
502 | shared_ptr<Channel> _channel; | |
503 | friend class TriggerStage; | |
504 | }; | |
505 | ||
506 | /** Type of datafeed callback */ | |
507 | typedef function<void(shared_ptr<Device>, shared_ptr<Packet>)> | |
508 | DatafeedCallbackFunction; | |
509 | ||
510 | /* Data required for C callback function to call a C++ datafeed callback */ | |
511 | class SR_PRIV DatafeedCallbackData | |
512 | { | |
513 | public: | |
514 | void run(const struct sr_dev_inst *sdi, | |
515 | const struct sr_datafeed_packet *pkt); | |
516 | protected: | |
517 | DatafeedCallbackFunction _callback; | |
518 | DatafeedCallbackData(Session *session, | |
519 | DatafeedCallbackFunction callback); | |
520 | Session *_session; | |
521 | friend class Session; | |
522 | }; | |
523 | ||
524 | /** Type of source callback */ | |
525 | typedef function<bool(Glib::IOCondition)> | |
526 | SourceCallbackFunction; | |
527 | ||
528 | /* Data required for C callback function to call a C++ source callback */ | |
529 | class SR_PRIV SourceCallbackData | |
530 | { | |
531 | public: | |
532 | bool run(int revents); | |
533 | protected: | |
534 | SourceCallbackData(shared_ptr<EventSource> source); | |
535 | shared_ptr<EventSource> _source; | |
536 | friend class Session; | |
537 | }; | |
538 | ||
539 | /** An I/O event source */ | |
540 | class SR_API EventSource | |
541 | { | |
542 | public: | |
543 | /** Create an event source from a file descriptor. | |
544 | * @param fd File descriptor. | |
545 | * @param events GLib IOCondition event mask. | |
546 | * @param timeout Timeout in milliseconds. | |
547 | * @param callback Callback of the form callback(events) */ | |
548 | static shared_ptr<EventSource> create(int fd, Glib::IOCondition events, | |
549 | int timeout, SourceCallbackFunction callback); | |
550 | /** Create an event source from a GLib PollFD | |
551 | * @param pollfd GLib PollFD | |
552 | * @param timeout Timeout in milliseconds. | |
553 | * @param callback Callback of the form callback(events) */ | |
554 | static shared_ptr<EventSource> create(Glib::PollFD pollfd, int timeout, | |
555 | SourceCallbackFunction callback); | |
556 | /** Create an event source from a GLib IOChannel | |
557 | * @param channel GLib IOChannel. | |
558 | * @param events GLib IOCondition event mask. | |
559 | * @param timeout Timeout in milliseconds. | |
560 | * @param callback Callback of the form callback(events) */ | |
561 | static shared_ptr<EventSource> create( | |
562 | Glib::RefPtr<Glib::IOChannel> channel, Glib::IOCondition events, | |
563 | int timeout, SourceCallbackFunction callback); | |
564 | protected: | |
565 | EventSource(int timeout, SourceCallbackFunction callback); | |
566 | ~EventSource(); | |
567 | enum source_type { | |
568 | SOURCE_FD, | |
569 | SOURCE_POLLFD, | |
570 | SOURCE_IOCHANNEL | |
571 | } _type; | |
572 | int _fd; | |
573 | Glib::PollFD _pollfd; | |
574 | Glib::RefPtr<Glib::IOChannel> _channel; | |
575 | Glib::IOCondition _events; | |
576 | int _timeout; | |
577 | SourceCallbackFunction _callback; | |
578 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
579 | class Deleter | |
580 | { | |
581 | public: | |
582 | void operator()(EventSource *source) { delete source; } | |
583 | }; | |
584 | friend class Deleter; | |
585 | friend class Session; | |
586 | friend class SourceCallbackData; | |
587 | }; | |
588 | ||
589 | /** A virtual device associated with a stored session */ | |
590 | class SR_API SessionDevice : | |
591 | public ParentOwned<SessionDevice, Session, struct sr_dev_inst>, | |
592 | public Device | |
593 | { | |
594 | protected: | |
595 | SessionDevice(struct sr_dev_inst *sdi); | |
596 | ~SessionDevice(); | |
597 | shared_ptr<Device> get_shared_from_this(); | |
598 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
599 | class Deleter | |
600 | { | |
601 | public: | |
602 | void operator()(SessionDevice *device) { delete device; } | |
603 | }; | |
604 | friend class Deleter; | |
605 | friend class Session; | |
606 | }; | |
607 | ||
608 | /** A sigrok session */ | |
609 | class SR_API Session : public UserOwned<Session, struct sr_session> | |
610 | { | |
611 | public: | |
612 | /** Add a device to this session. | |
613 | * @param device Device to add. */ | |
614 | void add_device(shared_ptr<Device> device); | |
615 | /** List devices attached to this session. */ | |
616 | vector<shared_ptr<Device> > devices(); | |
617 | /** Remove all devices from this session. */ | |
618 | void remove_devices(); | |
619 | /** Add a datafeed callback to this session. | |
620 | * @param callback Callback of the form callback(Device, Packet). */ | |
621 | void add_datafeed_callback(DatafeedCallbackFunction callback); | |
622 | /** Remove all datafeed callbacks from this session. */ | |
623 | void remove_datafeed_callbacks(); | |
624 | /** Add an I/O event source. | |
625 | * @param source EventSource to add. */ | |
626 | void add_source(shared_ptr<EventSource> source); | |
627 | /** Remove an event source. | |
628 | * @param source EventSource to remove. */ | |
629 | void remove_source(shared_ptr<EventSource> source); | |
630 | /** Start the session. */ | |
631 | void start(); | |
632 | /** Run the session event loop. */ | |
633 | void run(); | |
634 | /** Stop the session. */ | |
635 | void stop(); | |
636 | /** Begin saving session to a file. | |
637 | * @param filename File name string. */ | |
638 | void begin_save(string filename); | |
639 | /** Append a packet to the session file being saved. | |
640 | * @param packet Packet to append. */ | |
641 | void append(shared_ptr<Packet> packet); | |
642 | /** Append raw logic data to the session file being saved. */ | |
643 | void append(void *data, size_t length, unsigned int unit_size); | |
644 | /** Get current trigger setting. */ | |
645 | shared_ptr<Trigger> trigger(); | |
646 | /** Set trigger setting. | |
647 | * @param trigger Trigger object to use. */ | |
648 | void set_trigger(shared_ptr<Trigger> trigger); | |
649 | protected: | |
650 | Session(shared_ptr<Context> context); | |
651 | Session(shared_ptr<Context> context, string filename); | |
652 | ~Session(); | |
653 | const shared_ptr<Context> _context; | |
654 | map<const struct sr_dev_inst *, shared_ptr<Device> > _devices; | |
655 | vector<DatafeedCallbackData *> _datafeed_callbacks; | |
656 | map<shared_ptr<EventSource>, SourceCallbackData *> _source_callbacks; | |
657 | bool _saving; | |
658 | bool _save_initialized; | |
659 | string _save_filename; | |
660 | uint64_t _save_samplerate; | |
661 | shared_ptr<Trigger> _trigger; | |
662 | friend class Deleter; | |
663 | friend class Context; | |
664 | friend class DatafeedCallbackData; | |
665 | }; | |
666 | ||
667 | /** A packet on the session datafeed */ | |
668 | class SR_API Packet : public UserOwned<Packet, const struct sr_datafeed_packet> | |
669 | { | |
670 | public: | |
671 | /** Type of this packet. */ | |
672 | const PacketType *type(); | |
673 | /** Payload of this packet. */ | |
674 | shared_ptr<PacketPayload> payload(); | |
675 | protected: | |
676 | Packet(shared_ptr<Device> device, | |
677 | const struct sr_datafeed_packet *structure); | |
678 | ~Packet(); | |
679 | shared_ptr<Device> _device; | |
680 | PacketPayload *_payload; | |
681 | friend class Deleter; | |
682 | friend class Session; | |
683 | friend class Output; | |
684 | friend class DatafeedCallbackData; | |
685 | friend class Header; | |
686 | friend class Meta; | |
687 | friend class Logic; | |
688 | friend class Analog; | |
689 | }; | |
690 | ||
691 | /** Abstract base class for datafeed packet payloads */ | |
692 | class SR_API PacketPayload | |
693 | { | |
694 | protected: | |
695 | PacketPayload(); | |
696 | virtual ~PacketPayload() = 0; | |
697 | virtual shared_ptr<PacketPayload> get_shared_pointer(Packet *parent) = 0; | |
698 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
699 | class Deleter | |
700 | { | |
701 | public: | |
702 | void operator()(PacketPayload *payload) { delete payload; } | |
703 | }; | |
704 | friend class Deleter; | |
705 | friend class Packet; | |
706 | friend class Output; | |
707 | }; | |
708 | ||
709 | /** Payload of a datafeed header packet */ | |
710 | class SR_API Header : | |
711 | public ParentOwned<Header, Packet, const struct sr_datafeed_header>, | |
712 | public PacketPayload | |
713 | { | |
714 | public: | |
715 | /* Feed version number. */ | |
716 | int feed_version(); | |
717 | /* Start time of this session. */ | |
718 | Glib::TimeVal start_time(); | |
719 | protected: | |
720 | Header(const struct sr_datafeed_header *structure); | |
721 | ~Header(); | |
722 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
723 | friend class Packet; | |
724 | }; | |
725 | ||
726 | /** Payload of a datafeed metadata packet */ | |
727 | class SR_API Meta : | |
728 | public ParentOwned<Meta, Packet, const struct sr_datafeed_meta>, | |
729 | public PacketPayload | |
730 | { | |
731 | public: | |
732 | /* Mapping of (ConfigKey, value) pairs. */ | |
733 | map<const ConfigKey *, Glib::VariantBase> config(); | |
734 | protected: | |
735 | Meta(const struct sr_datafeed_meta *structure); | |
736 | ~Meta(); | |
737 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
738 | map<const ConfigKey *, Glib::VariantBase> _config; | |
739 | friend class Packet; | |
740 | }; | |
741 | ||
742 | /** Payload of a datafeed packet with logic data */ | |
743 | class SR_API Logic : | |
744 | public ParentOwned<Logic, Packet, const struct sr_datafeed_logic>, | |
745 | public PacketPayload | |
746 | { | |
747 | public: | |
748 | /* Pointer to data. */ | |
749 | void *data_pointer(); | |
750 | /* Data length in bytes. */ | |
751 | size_t data_length(); | |
752 | /* Size of each sample in bytes. */ | |
753 | unsigned int unit_size(); | |
754 | protected: | |
755 | Logic(const struct sr_datafeed_logic *structure); | |
756 | ~Logic(); | |
757 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
758 | friend class Packet; | |
759 | }; | |
760 | ||
761 | /** Payload of a datafeed packet with analog data */ | |
762 | class SR_API Analog : | |
763 | public ParentOwned<Analog, Packet, const struct sr_datafeed_analog>, | |
764 | public PacketPayload | |
765 | { | |
766 | public: | |
767 | /** Pointer to data. */ | |
768 | float *data_pointer(); | |
769 | /** Number of samples in this packet. */ | |
770 | unsigned int num_samples(); | |
771 | /** Channels for which this packet contains data. */ | |
772 | vector<shared_ptr<Channel> > channels(); | |
773 | /** Measured quantity of the samples in this packet. */ | |
774 | const Quantity *mq(); | |
775 | /** Unit of the samples in this packet. */ | |
776 | const Unit *unit(); | |
777 | /** Measurement flags associated with the samples in this packet. */ | |
778 | vector<const QuantityFlag *> mq_flags(); | |
779 | protected: | |
780 | Analog(const struct sr_datafeed_analog *structure); | |
781 | ~Analog(); | |
782 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
783 | friend class Packet; | |
784 | }; | |
785 | ||
786 | /** An input format supported by the library */ | |
787 | class SR_API InputFormat : | |
788 | public ParentOwned<InputFormat, Context, const struct sr_input_module> | |
789 | { | |
790 | public: | |
791 | /** Name of this input format. */ | |
792 | string name(); | |
793 | /** Description of this input format. */ | |
794 | string description(); | |
795 | /** Options supported by this input format. */ | |
796 | map<string, shared_ptr<Option> > options(); | |
797 | /** Create an input using this input format. | |
798 | * @param options Mapping of (option name, value) pairs. */ | |
799 | shared_ptr<Input> create_input(map<string, Glib::VariantBase> options = | |
800 | map<string, Glib::VariantBase>()); | |
801 | protected: | |
802 | InputFormat(const struct sr_input_module *structure); | |
803 | ~InputFormat(); | |
804 | friend class Context; | |
805 | friend class InputDevice; | |
806 | }; | |
807 | ||
808 | /** An input instance (an input format applied to a file or stream) */ | |
809 | class SR_API Input : public UserOwned<Input, const struct sr_input> | |
810 | { | |
811 | public: | |
812 | /** Virtual device associated with this input. */ | |
813 | shared_ptr<InputDevice> device(); | |
814 | /** Send next stream data. | |
815 | * @param data Next stream data. */ | |
816 | void send(string data); | |
817 | protected: | |
818 | Input(shared_ptr<Context> context, const struct sr_input *structure); | |
819 | ~Input(); | |
820 | shared_ptr<Context> _context; | |
821 | InputDevice *_device; | |
822 | friend class Deleter; | |
823 | friend class Context; | |
824 | friend class InputFormat; | |
825 | }; | |
826 | ||
827 | /** A virtual device associated with an input */ | |
828 | class SR_API InputDevice : | |
829 | public ParentOwned<InputDevice, Input, struct sr_dev_inst>, | |
830 | public Device | |
831 | { | |
832 | protected: | |
833 | InputDevice(shared_ptr<Input> input, struct sr_dev_inst *sdi); | |
834 | ~InputDevice(); | |
835 | shared_ptr<Device> get_shared_from_this(); | |
836 | shared_ptr<Input> _input; | |
837 | friend class Input; | |
838 | }; | |
839 | ||
840 | /** An option used by an output format */ | |
841 | class SR_API Option : public UserOwned<Option, const struct sr_option> | |
842 | { | |
843 | public: | |
844 | /** Short name of this option suitable for command line usage. */ | |
845 | string id(); | |
846 | /** Short name of this option suitable for GUI usage. */ | |
847 | string name(); | |
848 | /** Description of this option in a sentence. */ | |
849 | string description(); | |
850 | /** Default value for this option. */ | |
851 | Glib::VariantBase default_value(); | |
852 | /** Possible values for this option, if a limited set. */ | |
853 | vector<Glib::VariantBase> values(); | |
854 | protected: | |
855 | Option(const struct sr_option *structure, | |
856 | shared_ptr<const struct sr_option *> structure_array); | |
857 | ~Option(); | |
858 | shared_ptr<const struct sr_option *> _structure_array; | |
859 | friend class Deleter; | |
860 | friend class InputFormat; | |
861 | friend class OutputFormat; | |
862 | }; | |
863 | ||
864 | /** An output format supported by the library */ | |
865 | class SR_API OutputFormat : | |
866 | public ParentOwned<OutputFormat, Context, const struct sr_output_module> | |
867 | { | |
868 | public: | |
869 | /** Name of this output format. */ | |
870 | string name(); | |
871 | /** Description of this output format. */ | |
872 | string description(); | |
873 | /** Options supported by this output format. */ | |
874 | map<string, shared_ptr<Option> > options(); | |
875 | /** Create an output using this format. | |
876 | * @param device Device to output for. | |
877 | * @param options Mapping of (option name, value) pairs. */ | |
878 | shared_ptr<Output> create_output(shared_ptr<Device> device, | |
879 | map<string, Glib::VariantBase> options = | |
880 | map<string, Glib::VariantBase>()); | |
881 | protected: | |
882 | OutputFormat(const struct sr_output_module *structure); | |
883 | ~OutputFormat(); | |
884 | friend class Context; | |
885 | friend class Output; | |
886 | }; | |
887 | ||
888 | /** An output instance (an output format applied to a device) */ | |
889 | class SR_API Output : public UserOwned<Output, const struct sr_output> | |
890 | { | |
891 | public: | |
892 | /** Update output with data from the given packet. | |
893 | * @param packet Packet to handle. */ | |
894 | string receive(shared_ptr<Packet> packet); | |
895 | protected: | |
896 | Output(shared_ptr<OutputFormat> format, shared_ptr<Device> device); | |
897 | Output(shared_ptr<OutputFormat> format, | |
898 | shared_ptr<Device> device, map<string, Glib::VariantBase> options); | |
899 | ~Output(); | |
900 | const shared_ptr<OutputFormat> _format; | |
901 | const shared_ptr<Device> _device; | |
902 | const map<string, Glib::VariantBase> _options; | |
903 | friend class Deleter; | |
904 | friend class OutputFormat; | |
905 | }; | |
906 | ||
907 | /** Base class for objects which wrap an enumeration value from libsigrok */ | |
908 | template <typename T> class SR_API EnumValue | |
909 | { | |
910 | public: | |
911 | /** The enum constant associated with this value. */ | |
912 | T id() const { return _id; } | |
913 | /** The name associated with this value. */ | |
914 | string name() const { return _name; } | |
915 | protected: | |
916 | EnumValue(T id, const char name[]) : _id(id), _name(name) {} | |
917 | ~EnumValue() {} | |
918 | const T _id; | |
919 | const string _name; | |
920 | }; | |
921 | ||
922 | #include "enums.hpp" | |
923 | ||
924 | } | |
925 | ||
926 | #endif // LIBSIGROK_HPP |