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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 | #include <set> | |
81 | ||
82 | namespace sigrok | |
83 | { | |
84 | ||
85 | using namespace std; | |
86 | ||
87 | /* Forward declarations */ | |
88 | class SR_API Error; | |
89 | class SR_API Context; | |
90 | class SR_API Driver; | |
91 | class SR_API Device; | |
92 | class SR_API HardwareDevice; | |
93 | class SR_API Channel; | |
94 | class SR_API EventSource; | |
95 | class SR_API Session; | |
96 | class SR_API ConfigKey; | |
97 | class SR_API InputFormat; | |
98 | class SR_API OutputFormat; | |
99 | class SR_API LogLevel; | |
100 | class SR_API ChannelGroup; | |
101 | class SR_API Trigger; | |
102 | class SR_API TriggerStage; | |
103 | class SR_API TriggerMatch; | |
104 | class SR_API TriggerMatchType; | |
105 | class SR_API ChannelType; | |
106 | class SR_API Packet; | |
107 | class SR_API PacketPayload; | |
108 | class SR_API PacketType; | |
109 | class SR_API Quantity; | |
110 | class SR_API Unit; | |
111 | class SR_API QuantityFlag; | |
112 | class SR_API Input; | |
113 | class SR_API InputDevice; | |
114 | class SR_API Output; | |
115 | class SR_API DataType; | |
116 | class SR_API Option; | |
117 | ||
118 | /** Exception thrown when an error code is returned by any libsigrok call. */ | |
119 | class SR_API Error: public exception | |
120 | { | |
121 | public: | |
122 | Error(int result); | |
123 | ~Error() throw(); | |
124 | const int result; | |
125 | const char *what() const throw(); | |
126 | }; | |
127 | ||
128 | /* Base template for classes whose resources are owned by a parent object. */ | |
129 | template <class Class, class Parent, typename Struct> | |
130 | class SR_API ParentOwned | |
131 | { | |
132 | protected: | |
133 | /* Parent object which owns this child object's underlying structure. | |
134 | ||
135 | This shared pointer will be null when this child is unused, but | |
136 | will be assigned to point to the parent before any shared pointer | |
137 | to this child is handed out to the user. | |
138 | ||
139 | When the reference count of this child falls to zero, this shared | |
140 | pointer to its parent is reset by a custom deleter on the child's | |
141 | shared pointer. | |
142 | ||
143 | This strategy ensures that the destructors for both the child and | |
144 | the parent are called at the correct time, i.e. only when all | |
145 | references to both the parent and all its children are gone. */ | |
146 | shared_ptr<Parent> _parent; | |
147 | ||
148 | /* Weak pointer for shared_from_this() implementation. */ | |
149 | weak_ptr<Class> _weak_this; | |
150 | ||
151 | public: | |
152 | /* Get parent object that owns this object. */ | |
153 | shared_ptr<Parent> parent() | |
154 | { | |
155 | return _parent; | |
156 | } | |
157 | ||
158 | /* Note, this implementation will create a new smart_ptr if none exists. */ | |
159 | shared_ptr<Class> shared_from_this() | |
160 | { | |
161 | shared_ptr<Class> shared; | |
162 | ||
163 | if (!(shared = _weak_this.lock())) | |
164 | { | |
165 | shared = shared_ptr<Class>((Class *) this, reset_parent); | |
166 | _weak_this = shared; | |
167 | } | |
168 | ||
169 | return shared; | |
170 | } | |
171 | ||
172 | shared_ptr<Class> get_shared_pointer(shared_ptr<Parent> parent) | |
173 | { | |
174 | if (!parent) | |
175 | throw Error(SR_ERR_BUG); | |
176 | this->_parent = parent; | |
177 | return shared_from_this(); | |
178 | } | |
179 | ||
180 | shared_ptr<Class> get_shared_pointer(Parent *parent) | |
181 | { | |
182 | if (!parent) | |
183 | throw Error(SR_ERR_BUG); | |
184 | return get_shared_pointer(parent->shared_from_this()); | |
185 | } | |
186 | protected: | |
187 | static void reset_parent(Class *object) | |
188 | { | |
189 | if (!object->_parent) | |
190 | throw Error(SR_ERR_BUG); | |
191 | object->_parent.reset(); | |
192 | } | |
193 | ||
194 | Struct *_structure; | |
195 | ||
196 | ParentOwned<Class, Parent, Struct>(Struct *structure) : | |
197 | _structure(structure) | |
198 | { | |
199 | } | |
200 | }; | |
201 | ||
202 | /* Base template for classes whose resources are owned by the user. */ | |
203 | template <class Class, typename Struct> | |
204 | class SR_API UserOwned : public enable_shared_from_this<Class> | |
205 | { | |
206 | public: | |
207 | shared_ptr<Class> shared_from_this() | |
208 | { | |
209 | auto shared = enable_shared_from_this<Class>::shared_from_this(); | |
210 | if (!shared) | |
211 | throw Error(SR_ERR_BUG); | |
212 | return shared; | |
213 | } | |
214 | protected: | |
215 | Struct *_structure; | |
216 | ||
217 | UserOwned<Class, Struct>(Struct *structure) : | |
218 | _structure(structure) | |
219 | { | |
220 | } | |
221 | ||
222 | /* Deleter needed to allow shared_ptr use with protected destructor. */ | |
223 | class Deleter | |
224 | { | |
225 | public: | |
226 | void operator()(Class *object) { delete object; } | |
227 | }; | |
228 | }; | |
229 | ||
230 | /** Type of log callback */ | |
231 | typedef function<void(const LogLevel *, string message)> LogCallbackFunction; | |
232 | ||
233 | /** The global libsigrok context */ | |
234 | class SR_API Context : public UserOwned<Context, struct sr_context> | |
235 | { | |
236 | public: | |
237 | /** Create new context */ | |
238 | static shared_ptr<Context> create(); | |
239 | /** libsigrok package version. */ | |
240 | string package_version(); | |
241 | /** libsigrok library version. */ | |
242 | string lib_version(); | |
243 | /** Available hardware drivers, indexed by name. */ | |
244 | map<string, shared_ptr<Driver> > drivers(); | |
245 | /** Available input formats, indexed by name. */ | |
246 | map<string, shared_ptr<InputFormat> > input_formats(); | |
247 | /** Available output formats, indexed by name. */ | |
248 | map<string, shared_ptr<OutputFormat> > output_formats(); | |
249 | /** Current log level. */ | |
250 | const LogLevel *log_level(); | |
251 | /** Set the log level. | |
252 | * @param level LogLevel to use. */ | |
253 | void set_log_level(const LogLevel *level); | |
254 | /** Current log domain. */ | |
255 | string log_domain(); | |
256 | /** Set the log domain. | |
257 | * @param value Log domain prefix string. */ | |
258 | void set_log_domain(string value); | |
259 | /** Set the log callback. | |
260 | * @param callback Callback of the form callback(LogLevel, string). */ | |
261 | void set_log_callback(LogCallbackFunction callback); | |
262 | /** Set the log callback to the default handler. */ | |
263 | void set_log_callback_default(); | |
264 | /** Create a new session. */ | |
265 | shared_ptr<Session> create_session(); | |
266 | /** Load a saved session. | |
267 | * @param filename File name string. */ | |
268 | shared_ptr<Session> load_session(string filename); | |
269 | /** Create a new trigger. | |
270 | * @param name Name string for new trigger. */ | |
271 | shared_ptr<Trigger> create_trigger(string name); | |
272 | /** Open an input file. | |
273 | * @param filename File name string. */ | |
274 | shared_ptr<Input> open_file(string filename); | |
275 | /** Open an input stream based on header data. | |
276 | * @param header Initial data from stream. */ | |
277 | shared_ptr<Input> open_stream(string header); | |
278 | protected: | |
279 | map<string, Driver *> _drivers; | |
280 | map<string, InputFormat *> _input_formats; | |
281 | map<string, OutputFormat *> _output_formats; | |
282 | Session *_session; | |
283 | LogCallbackFunction _log_callback; | |
284 | Context(); | |
285 | ~Context(); | |
286 | friend class Deleter; | |
287 | friend class Session; | |
288 | friend class Driver; | |
289 | }; | |
290 | ||
291 | enum Capability { | |
292 | GET = SR_CONF_GET, | |
293 | SET = SR_CONF_SET, | |
294 | LIST = SR_CONF_LIST | |
295 | }; | |
296 | ||
297 | /** An object that can be configured. */ | |
298 | class SR_API Configurable | |
299 | { | |
300 | public: | |
301 | /** Read configuration for the given key. | |
302 | * @param key ConfigKey to read. */ | |
303 | Glib::VariantBase config_get(const ConfigKey *key); | |
304 | /** Set configuration for the given key to a specified value. | |
305 | * @param key ConfigKey to set. | |
306 | * @param value Value to set. */ | |
307 | void config_set(const ConfigKey *key, Glib::VariantBase value); | |
308 | /** Enumerate available values for the given configuration key. | |
309 | * @param key ConfigKey to enumerate values for. */ | |
310 | Glib::VariantContainerBase config_list(const ConfigKey *key); | |
311 | /** Enumerate available keys, according to a given index key. */ | |
312 | map<const ConfigKey *, set<Capability> > config_keys(const ConfigKey *key); | |
313 | /** Check for a key in the list from a given index key. */ | |
314 | bool config_check(const ConfigKey *key, const ConfigKey *index_key); | |
315 | protected: | |
316 | Configurable( | |
317 | struct sr_dev_driver *driver, | |
318 | struct sr_dev_inst *sdi, | |
319 | struct sr_channel_group *channel_group); | |
320 | virtual ~Configurable(); | |
321 | struct sr_dev_driver *config_driver; | |
322 | struct sr_dev_inst *config_sdi; | |
323 | struct sr_channel_group *config_channel_group; | |
324 | }; | |
325 | ||
326 | /** A hardware driver provided by the library */ | |
327 | class SR_API Driver : | |
328 | public ParentOwned<Driver, Context, struct sr_dev_driver>, | |
329 | public Configurable | |
330 | { | |
331 | public: | |
332 | /** Name of this driver. */ | |
333 | string name(); | |
334 | /** Long name for this driver. */ | |
335 | string long_name(); | |
336 | /** Scan for devices and return a list of devices found. | |
337 | * @param options Mapping of (ConfigKey, value) pairs. */ | |
338 | vector<shared_ptr<HardwareDevice> > scan( | |
339 | map<const ConfigKey *, Glib::VariantBase> options = | |
340 | map<const ConfigKey *, Glib::VariantBase>()); | |
341 | protected: | |
342 | bool _initialized; | |
343 | vector<HardwareDevice *> _devices; | |
344 | Driver(struct sr_dev_driver *structure); | |
345 | ~Driver(); | |
346 | friend class Context; | |
347 | friend class HardwareDevice; | |
348 | friend class ChannelGroup; | |
349 | }; | |
350 | ||
351 | /** A generic device, either hardware or virtual */ | |
352 | class SR_API Device : public Configurable | |
353 | { | |
354 | public: | |
355 | /** Vendor name for this device. */ | |
356 | string vendor(); | |
357 | /** Model name for this device. */ | |
358 | string model(); | |
359 | /** Version string for this device. */ | |
360 | string version(); | |
361 | /** Serial number for this device. */ | |
362 | string serial_number(); | |
363 | /** Connection ID for this device. */ | |
364 | string connection_id(); | |
365 | /** List of the channels available on this device. */ | |
366 | vector<shared_ptr<Channel> > channels(); | |
367 | /** Channel groups available on this device, indexed by name. */ | |
368 | map<string, shared_ptr<ChannelGroup> > channel_groups(); | |
369 | /** Open device. */ | |
370 | void open(); | |
371 | /** Close device. */ | |
372 | void close(); | |
373 | protected: | |
374 | Device(struct sr_dev_inst *structure); | |
375 | ~Device(); | |
376 | virtual shared_ptr<Device> get_shared_from_this() = 0; | |
377 | shared_ptr<Channel> get_channel(struct sr_channel *ptr); | |
378 | struct sr_dev_inst *_structure; | |
379 | map<struct sr_channel *, Channel *> _channels; | |
380 | map<string, ChannelGroup *> _channel_groups; | |
381 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
382 | class Deleter | |
383 | { | |
384 | public: | |
385 | void operator()(Device *device) { delete device; } | |
386 | }; | |
387 | friend class Deleter; | |
388 | friend class Session; | |
389 | friend class Channel; | |
390 | friend class ChannelGroup; | |
391 | friend class Output; | |
392 | friend class Analog; | |
393 | }; | |
394 | ||
395 | /** A real hardware device, connected via a driver */ | |
396 | class SR_API HardwareDevice : | |
397 | public UserOwned<HardwareDevice, struct sr_dev_inst>, | |
398 | public Device | |
399 | { | |
400 | public: | |
401 | /** Driver providing this device. */ | |
402 | shared_ptr<Driver> driver(); | |
403 | protected: | |
404 | HardwareDevice(shared_ptr<Driver> driver, struct sr_dev_inst *structure); | |
405 | ~HardwareDevice(); | |
406 | shared_ptr<Device> get_shared_from_this(); | |
407 | shared_ptr<Driver> _driver; | |
408 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
409 | class Deleter | |
410 | { | |
411 | public: | |
412 | void operator()(HardwareDevice *device) { delete device; } | |
413 | }; | |
414 | friend class Deleter; | |
415 | friend class Driver; | |
416 | friend class ChannelGroup; | |
417 | }; | |
418 | ||
419 | /** A channel on a device */ | |
420 | class SR_API Channel : | |
421 | public ParentOwned<Channel, Device, struct sr_channel> | |
422 | { | |
423 | public: | |
424 | /** Current name of this channel. */ | |
425 | string name(); | |
426 | /** Set the name of this channel. * | |
427 | * @param name Name string to set. */ | |
428 | void set_name(string name); | |
429 | /** Type of this channel. */ | |
430 | const ChannelType *type(); | |
431 | /** Enabled status of this channel. */ | |
432 | bool enabled(); | |
433 | /** Set the enabled status of this channel. | |
434 | * @param value Boolean value to set. */ | |
435 | void set_enabled(bool value); | |
436 | /** Get the index number of this channel. */ | |
437 | unsigned int index(); | |
438 | protected: | |
439 | Channel(struct sr_channel *structure); | |
440 | ~Channel(); | |
441 | const ChannelType * const _type; | |
442 | friend class Device; | |
443 | friend class ChannelGroup; | |
444 | friend class Session; | |
445 | friend class TriggerStage; | |
446 | }; | |
447 | ||
448 | /** A group of channels on a device, which share some configuration */ | |
449 | class SR_API ChannelGroup : | |
450 | public ParentOwned<ChannelGroup, Device, struct sr_channel_group>, | |
451 | public Configurable | |
452 | { | |
453 | public: | |
454 | /** Name of this channel group. */ | |
455 | string name(); | |
456 | /** List of the channels in this group. */ | |
457 | vector<shared_ptr<Channel> > channels(); | |
458 | protected: | |
459 | ChannelGroup(Device *device, struct sr_channel_group *structure); | |
460 | ~ChannelGroup(); | |
461 | vector<Channel *> _channels; | |
462 | friend class Device; | |
463 | }; | |
464 | ||
465 | /** A trigger configuration */ | |
466 | class SR_API Trigger : public UserOwned<Trigger, struct sr_trigger> | |
467 | { | |
468 | public: | |
469 | /** Name of this trigger configuration. */ | |
470 | string name(); | |
471 | /** List of the stages in this trigger. */ | |
472 | vector<shared_ptr<TriggerStage> > stages(); | |
473 | /** Add a new stage to this trigger. */ | |
474 | shared_ptr<TriggerStage> add_stage(); | |
475 | protected: | |
476 | Trigger(shared_ptr<Context> context, string name); | |
477 | ~Trigger(); | |
478 | shared_ptr<Context> _context; | |
479 | vector<TriggerStage *> _stages; | |
480 | friend class Deleter; | |
481 | friend class Context; | |
482 | friend class Session; | |
483 | }; | |
484 | ||
485 | /** A stage in a trigger configuration */ | |
486 | class SR_API TriggerStage : | |
487 | public ParentOwned<TriggerStage, Trigger, struct sr_trigger_stage> | |
488 | { | |
489 | public: | |
490 | /** Index number of this stage. */ | |
491 | int number(); | |
492 | /** List of match conditions on this stage. */ | |
493 | vector<shared_ptr<TriggerMatch> > matches(); | |
494 | /** Add a new match condition to this stage. | |
495 | * @param channel Channel to match on. | |
496 | * @param type TriggerMatchType to apply. */ | |
497 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type); | |
498 | /** Add a new match condition to this stage. | |
499 | * @param channel Channel to match on. | |
500 | * @param type TriggerMatchType to apply. | |
501 | * @param value Threshold value. */ | |
502 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type, float value); | |
503 | protected: | |
504 | vector<TriggerMatch *> _matches; | |
505 | TriggerStage(struct sr_trigger_stage *structure); | |
506 | ~TriggerStage(); | |
507 | friend class Trigger; | |
508 | }; | |
509 | ||
510 | /** A match condition in a trigger configuration */ | |
511 | class SR_API TriggerMatch : | |
512 | public ParentOwned<TriggerMatch, TriggerStage, struct sr_trigger_match> | |
513 | { | |
514 | public: | |
515 | /** Channel this condition matches on. */ | |
516 | shared_ptr<Channel> channel(); | |
517 | /** Type of match. */ | |
518 | const TriggerMatchType *type(); | |
519 | /** Threshold value. */ | |
520 | float value(); | |
521 | protected: | |
522 | TriggerMatch(struct sr_trigger_match *structure, shared_ptr<Channel> channel); | |
523 | ~TriggerMatch(); | |
524 | shared_ptr<Channel> _channel; | |
525 | friend class TriggerStage; | |
526 | }; | |
527 | ||
528 | /** Type of datafeed callback */ | |
529 | typedef function<void(shared_ptr<Device>, shared_ptr<Packet>)> | |
530 | DatafeedCallbackFunction; | |
531 | ||
532 | /* Data required for C callback function to call a C++ datafeed callback */ | |
533 | class SR_PRIV DatafeedCallbackData | |
534 | { | |
535 | public: | |
536 | void run(const struct sr_dev_inst *sdi, | |
537 | const struct sr_datafeed_packet *pkt); | |
538 | protected: | |
539 | DatafeedCallbackFunction _callback; | |
540 | DatafeedCallbackData(Session *session, | |
541 | DatafeedCallbackFunction callback); | |
542 | Session *_session; | |
543 | friend class Session; | |
544 | }; | |
545 | ||
546 | /** Type of source callback */ | |
547 | typedef function<bool(Glib::IOCondition)> | |
548 | SourceCallbackFunction; | |
549 | ||
550 | /* Data required for C callback function to call a C++ source callback */ | |
551 | class SR_PRIV SourceCallbackData | |
552 | { | |
553 | public: | |
554 | bool run(int revents); | |
555 | protected: | |
556 | SourceCallbackData(shared_ptr<EventSource> source); | |
557 | shared_ptr<EventSource> _source; | |
558 | friend class Session; | |
559 | }; | |
560 | ||
561 | /** An I/O event source */ | |
562 | class SR_API EventSource | |
563 | { | |
564 | public: | |
565 | /** Create an event source from a file descriptor. | |
566 | * @param fd File descriptor. | |
567 | * @param events GLib IOCondition event mask. | |
568 | * @param timeout Timeout in milliseconds. | |
569 | * @param callback Callback of the form callback(events) */ | |
570 | static shared_ptr<EventSource> create(int fd, Glib::IOCondition events, | |
571 | int timeout, SourceCallbackFunction callback); | |
572 | /** Create an event source from a GLib PollFD | |
573 | * @param pollfd GLib PollFD | |
574 | * @param timeout Timeout in milliseconds. | |
575 | * @param callback Callback of the form callback(events) */ | |
576 | static shared_ptr<EventSource> create(Glib::PollFD pollfd, int timeout, | |
577 | SourceCallbackFunction callback); | |
578 | /** Create an event source from a GLib IOChannel | |
579 | * @param channel GLib IOChannel. | |
580 | * @param events GLib IOCondition event mask. | |
581 | * @param timeout Timeout in milliseconds. | |
582 | * @param callback Callback of the form callback(events) */ | |
583 | static shared_ptr<EventSource> create( | |
584 | Glib::RefPtr<Glib::IOChannel> channel, Glib::IOCondition events, | |
585 | int timeout, SourceCallbackFunction callback); | |
586 | protected: | |
587 | EventSource(int timeout, SourceCallbackFunction callback); | |
588 | ~EventSource(); | |
589 | enum source_type { | |
590 | SOURCE_FD, | |
591 | SOURCE_POLLFD, | |
592 | SOURCE_IOCHANNEL | |
593 | } _type; | |
594 | int _fd; | |
595 | Glib::PollFD _pollfd; | |
596 | Glib::RefPtr<Glib::IOChannel> _channel; | |
597 | Glib::IOCondition _events; | |
598 | int _timeout; | |
599 | SourceCallbackFunction _callback; | |
600 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
601 | class Deleter | |
602 | { | |
603 | public: | |
604 | void operator()(EventSource *source) { delete source; } | |
605 | }; | |
606 | friend class Deleter; | |
607 | friend class Session; | |
608 | friend class SourceCallbackData; | |
609 | }; | |
610 | ||
611 | /** A virtual device associated with a stored session */ | |
612 | class SR_API SessionDevice : | |
613 | public ParentOwned<SessionDevice, Session, struct sr_dev_inst>, | |
614 | public Device | |
615 | { | |
616 | protected: | |
617 | SessionDevice(struct sr_dev_inst *sdi); | |
618 | ~SessionDevice(); | |
619 | shared_ptr<Device> get_shared_from_this(); | |
620 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
621 | class Deleter | |
622 | { | |
623 | public: | |
624 | void operator()(SessionDevice *device) { delete device; } | |
625 | }; | |
626 | friend class Deleter; | |
627 | friend class Session; | |
628 | }; | |
629 | ||
630 | /** A sigrok session */ | |
631 | class SR_API Session : public UserOwned<Session, struct sr_session> | |
632 | { | |
633 | public: | |
634 | /** Add a device to this session. | |
635 | * @param device Device to add. */ | |
636 | void add_device(shared_ptr<Device> device); | |
637 | /** List devices attached to this session. */ | |
638 | vector<shared_ptr<Device> > devices(); | |
639 | /** Remove all devices from this session. */ | |
640 | void remove_devices(); | |
641 | /** Add a datafeed callback to this session. | |
642 | * @param callback Callback of the form callback(Device, Packet). */ | |
643 | void add_datafeed_callback(DatafeedCallbackFunction callback); | |
644 | /** Remove all datafeed callbacks from this session. */ | |
645 | void remove_datafeed_callbacks(); | |
646 | /** Add an I/O event source. | |
647 | * @param source EventSource to add. */ | |
648 | void add_source(shared_ptr<EventSource> source); | |
649 | /** Remove an event source. | |
650 | * @param source EventSource to remove. */ | |
651 | void remove_source(shared_ptr<EventSource> source); | |
652 | /** Start the session. */ | |
653 | void start(); | |
654 | /** Run the session event loop. */ | |
655 | void run(); | |
656 | /** Stop the session. */ | |
657 | void stop(); | |
658 | /** Begin saving session to a file. | |
659 | * @param filename File name string. */ | |
660 | void begin_save(string filename); | |
661 | /** Append a packet to the session file being saved. | |
662 | * @param packet Packet to append. */ | |
663 | void append(shared_ptr<Packet> packet); | |
664 | /** Append raw logic data to the session file being saved. */ | |
665 | void append(void *data, size_t length, unsigned int unit_size); | |
666 | /** Get current trigger setting. */ | |
667 | shared_ptr<Trigger> trigger(); | |
668 | /** Set trigger setting. | |
669 | * @param trigger Trigger object to use. */ | |
670 | void set_trigger(shared_ptr<Trigger> trigger); | |
671 | /** Get filename this session was loaded from. */ | |
672 | string filename(); | |
673 | protected: | |
674 | Session(shared_ptr<Context> context); | |
675 | Session(shared_ptr<Context> context, string filename); | |
676 | ~Session(); | |
677 | shared_ptr<Device> get_device(const struct sr_dev_inst *sdi); | |
678 | const shared_ptr<Context> _context; | |
679 | map<const struct sr_dev_inst *, SessionDevice *> _owned_devices; | |
680 | map<const struct sr_dev_inst *, shared_ptr<Device> > _other_devices; | |
681 | vector<DatafeedCallbackData *> _datafeed_callbacks; | |
682 | map<shared_ptr<EventSource>, SourceCallbackData *> _source_callbacks; | |
683 | string _filename; | |
684 | bool _saving; | |
685 | bool _save_initialized; | |
686 | string _save_filename; | |
687 | uint64_t _save_samplerate; | |
688 | shared_ptr<Trigger> _trigger; | |
689 | friend class Deleter; | |
690 | friend class Context; | |
691 | friend class DatafeedCallbackData; | |
692 | friend class SessionDevice; | |
693 | }; | |
694 | ||
695 | /** A packet on the session datafeed */ | |
696 | class SR_API Packet : public UserOwned<Packet, const struct sr_datafeed_packet> | |
697 | { | |
698 | public: | |
699 | /** Type of this packet. */ | |
700 | const PacketType *type(); | |
701 | /** Payload of this packet. */ | |
702 | shared_ptr<PacketPayload> payload(); | |
703 | protected: | |
704 | Packet(shared_ptr<Device> device, | |
705 | const struct sr_datafeed_packet *structure); | |
706 | ~Packet(); | |
707 | shared_ptr<Device> _device; | |
708 | PacketPayload *_payload; | |
709 | friend class Deleter; | |
710 | friend class Session; | |
711 | friend class Output; | |
712 | friend class DatafeedCallbackData; | |
713 | friend class Header; | |
714 | friend class Meta; | |
715 | friend class Logic; | |
716 | friend class Analog; | |
717 | }; | |
718 | ||
719 | /** Abstract base class for datafeed packet payloads */ | |
720 | class SR_API PacketPayload | |
721 | { | |
722 | protected: | |
723 | PacketPayload(); | |
724 | virtual ~PacketPayload() = 0; | |
725 | virtual shared_ptr<PacketPayload> get_shared_pointer(Packet *parent) = 0; | |
726 | /** Deleter needed to allow shared_ptr use with protected destructor. */ | |
727 | class Deleter | |
728 | { | |
729 | public: | |
730 | void operator()(PacketPayload *payload) { delete payload; } | |
731 | }; | |
732 | friend class Deleter; | |
733 | friend class Packet; | |
734 | friend class Output; | |
735 | }; | |
736 | ||
737 | /** Payload of a datafeed header packet */ | |
738 | class SR_API Header : | |
739 | public ParentOwned<Header, Packet, const struct sr_datafeed_header>, | |
740 | public PacketPayload | |
741 | { | |
742 | public: | |
743 | /* Feed version number. */ | |
744 | int feed_version(); | |
745 | /* Start time of this session. */ | |
746 | Glib::TimeVal start_time(); | |
747 | protected: | |
748 | Header(const struct sr_datafeed_header *structure); | |
749 | ~Header(); | |
750 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
751 | friend class Packet; | |
752 | }; | |
753 | ||
754 | /** Payload of a datafeed metadata packet */ | |
755 | class SR_API Meta : | |
756 | public ParentOwned<Meta, Packet, const struct sr_datafeed_meta>, | |
757 | public PacketPayload | |
758 | { | |
759 | public: | |
760 | /* Mapping of (ConfigKey, value) pairs. */ | |
761 | map<const ConfigKey *, Glib::VariantBase> config(); | |
762 | protected: | |
763 | Meta(const struct sr_datafeed_meta *structure); | |
764 | ~Meta(); | |
765 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
766 | map<const ConfigKey *, Glib::VariantBase> _config; | |
767 | friend class Packet; | |
768 | }; | |
769 | ||
770 | /** Payload of a datafeed packet with logic data */ | |
771 | class SR_API Logic : | |
772 | public ParentOwned<Logic, Packet, const struct sr_datafeed_logic>, | |
773 | public PacketPayload | |
774 | { | |
775 | public: | |
776 | /* Pointer to data. */ | |
777 | void *data_pointer(); | |
778 | /* Data length in bytes. */ | |
779 | size_t data_length(); | |
780 | /* Size of each sample in bytes. */ | |
781 | unsigned int unit_size(); | |
782 | protected: | |
783 | Logic(const struct sr_datafeed_logic *structure); | |
784 | ~Logic(); | |
785 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
786 | friend class Packet; | |
787 | }; | |
788 | ||
789 | /** Payload of a datafeed packet with analog data */ | |
790 | class SR_API Analog : | |
791 | public ParentOwned<Analog, Packet, const struct sr_datafeed_analog>, | |
792 | public PacketPayload | |
793 | { | |
794 | public: | |
795 | /** Pointer to data. */ | |
796 | float *data_pointer(); | |
797 | /** Number of samples in this packet. */ | |
798 | unsigned int num_samples(); | |
799 | /** Channels for which this packet contains data. */ | |
800 | vector<shared_ptr<Channel> > channels(); | |
801 | /** Measured quantity of the samples in this packet. */ | |
802 | const Quantity *mq(); | |
803 | /** Unit of the samples in this packet. */ | |
804 | const Unit *unit(); | |
805 | /** Measurement flags associated with the samples in this packet. */ | |
806 | vector<const QuantityFlag *> mq_flags(); | |
807 | protected: | |
808 | Analog(const struct sr_datafeed_analog *structure); | |
809 | ~Analog(); | |
810 | shared_ptr<PacketPayload> get_shared_pointer(Packet *parent); | |
811 | friend class Packet; | |
812 | }; | |
813 | ||
814 | /** An input format supported by the library */ | |
815 | class SR_API InputFormat : | |
816 | public ParentOwned<InputFormat, Context, const struct sr_input_module> | |
817 | { | |
818 | public: | |
819 | /** Name of this input format. */ | |
820 | string name(); | |
821 | /** Description of this input format. */ | |
822 | string description(); | |
823 | /** Options supported by this input format. */ | |
824 | map<string, shared_ptr<Option> > options(); | |
825 | /** Create an input using this input format. | |
826 | * @param options Mapping of (option name, value) pairs. */ | |
827 | shared_ptr<Input> create_input(map<string, Glib::VariantBase> options = | |
828 | map<string, Glib::VariantBase>()); | |
829 | protected: | |
830 | InputFormat(const struct sr_input_module *structure); | |
831 | ~InputFormat(); | |
832 | friend class Context; | |
833 | friend class InputDevice; | |
834 | }; | |
835 | ||
836 | /** An input instance (an input format applied to a file or stream) */ | |
837 | class SR_API Input : public UserOwned<Input, const struct sr_input> | |
838 | { | |
839 | public: | |
840 | /** Virtual device associated with this input. */ | |
841 | shared_ptr<InputDevice> device(); | |
842 | /** Send next stream data. | |
843 | * @param data Next stream data. */ | |
844 | void send(string data); | |
845 | /** Signal end of input data. */ | |
846 | void end(); | |
847 | protected: | |
848 | Input(shared_ptr<Context> context, const struct sr_input *structure); | |
849 | ~Input(); | |
850 | shared_ptr<Context> _context; | |
851 | InputDevice *_device; | |
852 | friend class Deleter; | |
853 | friend class Context; | |
854 | friend class InputFormat; | |
855 | }; | |
856 | ||
857 | /** A virtual device associated with an input */ | |
858 | class SR_API InputDevice : | |
859 | public ParentOwned<InputDevice, Input, struct sr_dev_inst>, | |
860 | public Device | |
861 | { | |
862 | protected: | |
863 | InputDevice(shared_ptr<Input> input, struct sr_dev_inst *sdi); | |
864 | ~InputDevice(); | |
865 | shared_ptr<Device> get_shared_from_this(); | |
866 | shared_ptr<Input> _input; | |
867 | friend class Input; | |
868 | }; | |
869 | ||
870 | /** An option used by an output format */ | |
871 | class SR_API Option : public UserOwned<Option, const struct sr_option> | |
872 | { | |
873 | public: | |
874 | /** Short name of this option suitable for command line usage. */ | |
875 | string id(); | |
876 | /** Short name of this option suitable for GUI usage. */ | |
877 | string name(); | |
878 | /** Description of this option in a sentence. */ | |
879 | string description(); | |
880 | /** Default value for this option. */ | |
881 | Glib::VariantBase default_value(); | |
882 | /** Possible values for this option, if a limited set. */ | |
883 | vector<Glib::VariantBase> values(); | |
884 | protected: | |
885 | Option(const struct sr_option *structure, | |
886 | shared_ptr<const struct sr_option *> structure_array); | |
887 | ~Option(); | |
888 | shared_ptr<const struct sr_option *> _structure_array; | |
889 | friend class Deleter; | |
890 | friend class InputFormat; | |
891 | friend class OutputFormat; | |
892 | }; | |
893 | ||
894 | /** An output format supported by the library */ | |
895 | class SR_API OutputFormat : | |
896 | public ParentOwned<OutputFormat, Context, const struct sr_output_module> | |
897 | { | |
898 | public: | |
899 | /** Name of this output format. */ | |
900 | string name(); | |
901 | /** Description of this output format. */ | |
902 | string description(); | |
903 | /** Options supported by this output format. */ | |
904 | map<string, shared_ptr<Option> > options(); | |
905 | /** Create an output using this format. | |
906 | * @param device Device to output for. | |
907 | * @param options Mapping of (option name, value) pairs. */ | |
908 | shared_ptr<Output> create_output(shared_ptr<Device> device, | |
909 | map<string, Glib::VariantBase> options = | |
910 | map<string, Glib::VariantBase>()); | |
911 | protected: | |
912 | OutputFormat(const struct sr_output_module *structure); | |
913 | ~OutputFormat(); | |
914 | friend class Context; | |
915 | friend class Output; | |
916 | }; | |
917 | ||
918 | /** An output instance (an output format applied to a device) */ | |
919 | class SR_API Output : public UserOwned<Output, const struct sr_output> | |
920 | { | |
921 | public: | |
922 | /** Update output with data from the given packet. | |
923 | * @param packet Packet to handle. */ | |
924 | string receive(shared_ptr<Packet> packet); | |
925 | protected: | |
926 | Output(shared_ptr<OutputFormat> format, shared_ptr<Device> device); | |
927 | Output(shared_ptr<OutputFormat> format, | |
928 | shared_ptr<Device> device, map<string, Glib::VariantBase> options); | |
929 | ~Output(); | |
930 | const shared_ptr<OutputFormat> _format; | |
931 | const shared_ptr<Device> _device; | |
932 | const map<string, Glib::VariantBase> _options; | |
933 | friend class Deleter; | |
934 | friend class OutputFormat; | |
935 | }; | |
936 | ||
937 | /** Base class for objects which wrap an enumeration value from libsigrok */ | |
938 | template <typename T> class SR_API EnumValue | |
939 | { | |
940 | public: | |
941 | /** The enum constant associated with this value. */ | |
942 | T id() const { return _id; } | |
943 | /** The name associated with this value. */ | |
944 | string name() const { return _name; } | |
945 | protected: | |
946 | EnumValue(T id, const char name[]) : _id(id), _name(name) {} | |
947 | ~EnumValue() {} | |
948 | const T _id; | |
949 | const string _name; | |
950 | }; | |
951 | ||
952 | #include "enums.hpp" | |
953 | ||
954 | } | |
955 | ||
956 | #endif // LIBSIGROK_HPP |