2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013-2014 Martin Ling <martin-sigrok@earth.li>
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.
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.
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/>.
22 @mainpage API Reference
27 The libsigrokcxx API provides an object-oriented C++ interface to the
28 functionality in libsigrok, including automatic memory and resource management.
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.
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.
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.
48 This means that management of libsigrokcxx objects and their underlying
49 libsigrok resources can be treated as fully automatic. As long as all shared
50 pointers to objects are deleted or reassigned when no longer in use, all
51 underlying resources will be released at the right time.
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.
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.
70 #ifndef LIBSIGROKCXX_HPP
71 #define LIBSIGROKCXX_HPP
73 #include <libsigrok/libsigrok.h>
87 /* Forward declarations */
92 class SR_API HardwareDevice;
95 class SR_API ConfigKey;
96 class SR_API InputFormat;
97 class SR_API OutputFormat;
98 class SR_API OutputFlag;
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;
107 class SR_API PacketPayload;
108 class SR_API PacketType;
109 class SR_API Quantity;
111 class SR_API QuantityFlag;
113 class SR_API InputDevice;
115 class SR_API DataType;
117 class SR_API UserDevice;
119 /** Exception thrown when an error code is returned by any libsigrok call. */
120 class SR_API Error: public exception
123 explicit Error(int result);
126 const char *what() const noexcept;
129 /* Base template for classes whose resources are owned by a parent object. */
130 template <class Class, class Parent, typename Struct>
131 class SR_API ParentOwned
134 /* Weak pointer for shared_from_this() implementation. */
135 weak_ptr<Class> _weak_this;
137 static void reset_parent(Class *object)
139 if (!object->_parent)
140 throw Error(SR_ERR_BUG);
141 object->_parent.reset();
145 /* Parent object which owns this child object's underlying structure.
147 This shared pointer will be null when this child is unused, but
148 will be assigned to point to the parent before any shared pointer
149 to this child is handed out to the user.
151 When the reference count of this child falls to zero, this shared
152 pointer to its parent is reset by a custom deleter on the child's
155 This strategy ensures that the destructors for both the child and
156 the parent are called at the correct time, i.e. only when all
157 references to both the parent and all its children are gone. */
158 shared_ptr<Parent> _parent;
162 explicit ParentOwned(Struct *structure) :
163 _structure(structure)
168 /* Get parent object that owns this object. */
169 shared_ptr<Parent> parent()
174 /* Note, this implementation will create a new smart_ptr if none exists. */
175 shared_ptr<Class> shared_from_this()
177 shared_ptr<Class> shared;
179 if (!(shared = _weak_this.lock()))
181 shared = shared_ptr<Class>(static_cast<Class *>(this), reset_parent);
188 shared_ptr<Class> get_shared_pointer(shared_ptr<Parent> parent)
191 throw Error(SR_ERR_BUG);
192 this->_parent = parent;
193 return shared_from_this();
196 shared_ptr<Class> get_shared_pointer(Parent *parent)
199 throw Error(SR_ERR_BUG);
200 return get_shared_pointer(parent->shared_from_this());
204 /* Base template for classes whose resources are owned by the user. */
205 template <class Class, typename Struct>
206 class SR_API UserOwned : public enable_shared_from_this<Class>
209 shared_ptr<Class> shared_from_this()
211 auto shared = enable_shared_from_this<Class>::shared_from_this();
213 throw Error(SR_ERR_BUG);
219 explicit UserOwned(Struct *structure) :
220 _structure(structure)
224 /* Deleter needed to allow shared_ptr use with protected destructor. */
228 void operator()(Class *object) { delete object; }
232 /** Type of log callback */
233 typedef function<void(const LogLevel *, string message)> LogCallbackFunction;
235 /** Resource reader delegate. */
236 class SR_API ResourceReader
240 virtual ~ResourceReader();
242 /** Resource open hook. */
243 virtual void open(struct sr_resource *res, string name) = 0;
244 /** Resource close hook. */
245 virtual void close(struct sr_resource *res) = 0;
246 /** Resource read hook. */
247 virtual size_t read(const struct sr_resource *res, void *buf, size_t count) = 0;
249 static SR_PRIV int open_callback(struct sr_resource *res,
250 const char *name, void *cb_data) noexcept;
251 static SR_PRIV int close_callback(struct sr_resource *res,
252 void *cb_data) noexcept;
253 static SR_PRIV ssize_t read_callback(const struct sr_resource *res,
254 void *buf, size_t count, void *cb_data) noexcept;
255 friend class Context;
258 /** The global libsigrok context */
259 class SR_API Context : public UserOwned<Context, struct sr_context>
262 /** Create new context */
263 static shared_ptr<Context> create();
264 /** libsigrok package version. */
265 static string package_version();
266 /** libsigrok library version. */
267 static string lib_version();
268 /** Available hardware drivers, indexed by name. */
269 map<string, shared_ptr<Driver> > drivers();
270 /** Available input formats, indexed by name. */
271 map<string, shared_ptr<InputFormat> > input_formats();
272 /** Available output formats, indexed by name. */
273 map<string, shared_ptr<OutputFormat> > output_formats();
274 /** Current log level. */
275 const LogLevel *log_level() const;
276 /** Set the log level.
277 * @param level LogLevel to use. */
278 void set_log_level(const LogLevel *level);
279 /** Set the log callback.
280 * @param callback Callback of the form callback(LogLevel, string). */
281 void set_log_callback(LogCallbackFunction callback);
282 /** Set the log callback to the default handler. */
283 void set_log_callback_default();
284 /** Install a delegate for reading resource files.
285 * @param reader The resource reader delegate, or nullptr to unset. */
286 void set_resource_reader(ResourceReader *reader);
287 /** Create a new session. */
288 shared_ptr<Session> create_session();
289 /** Create a new user device. */
290 shared_ptr<UserDevice> create_user_device(
291 string vendor, string model, string version);
292 /** Create a header packet. */
293 shared_ptr<Packet> create_header_packet(Glib::TimeVal start_time);
294 /** Create a meta packet. */
295 shared_ptr<Packet> create_meta_packet(
296 const map<const ConfigKey *, Glib::VariantBase> &config);
297 /** Create a logic packet. */
298 shared_ptr<Packet> create_logic_packet(
299 void *data_pointer, size_t data_length, unsigned int unit_size);
300 /** Create an analog packet. */
301 shared_ptr<Packet> create_analog_packet(
302 const vector<shared_ptr<Channel> > &channels,
303 float *data_pointer, unsigned int num_samples, const Quantity *mq,
304 const Unit *unit, const vector<const QuantityFlag *> &mqflags);
305 /** Load a saved session.
306 * @param filename File name string. */
307 shared_ptr<Session> load_session(string filename);
308 /** Create a new trigger.
309 * @param name Name string for new trigger. */
310 shared_ptr<Trigger> create_trigger(string name);
311 /** Open an input file.
312 * @param filename File name string. */
313 shared_ptr<Input> open_file(string filename);
314 /** Open an input stream based on header data.
315 * @param header Initial data from stream. */
316 shared_ptr<Input> open_stream(string header);
317 map<string, string> serials(shared_ptr<Driver> driver) const;
319 map<string, Driver *> _drivers;
320 map<string, InputFormat *> _input_formats;
321 map<string, OutputFormat *> _output_formats;
323 LogCallbackFunction _log_callback;
326 friend class Deleter;
327 friend class Session;
337 /** An object that can be configured. */
338 class SR_API Configurable
341 /** Read configuration for the given key.
342 * @param key ConfigKey to read. */
343 Glib::VariantBase config_get(const ConfigKey *key) const;
344 /** Set configuration for the given key to a specified value.
345 * @param key ConfigKey to set.
346 * @param value Value to set. */
347 void config_set(const ConfigKey *key, const Glib::VariantBase &value);
348 /** Enumerate available values for the given configuration key.
349 * @param key ConfigKey to enumerate values for. */
350 Glib::VariantContainerBase config_list(const ConfigKey *key) const;
351 /** Enumerate available keys, according to a given index key. */
352 map<const ConfigKey *, set<Capability> > config_keys(const ConfigKey *key);
353 /** Check for a key in the list from a given index key. */
354 bool config_check(const ConfigKey *key, const ConfigKey *index_key) const;
357 struct sr_dev_driver *driver,
358 struct sr_dev_inst *sdi,
359 struct sr_channel_group *channel_group);
360 virtual ~Configurable();
361 struct sr_dev_driver *config_driver;
362 struct sr_dev_inst *config_sdi;
363 struct sr_channel_group *config_channel_group;
366 /** A hardware driver provided by the library */
367 class SR_API Driver :
368 public ParentOwned<Driver, Context, struct sr_dev_driver>,
372 /** Name of this driver. */
374 /** Long name for this driver. */
375 string long_name() const;
376 /** Scan for devices and return a list of devices found.
377 * @param options Mapping of (ConfigKey, value) pairs. */
378 vector<shared_ptr<HardwareDevice> > scan(
379 const map<const ConfigKey *, Glib::VariantBase> &options = {});
382 vector<HardwareDevice *> _devices;
383 explicit Driver(struct sr_dev_driver *structure);
385 friend class Context;
386 friend class HardwareDevice;
387 friend class ChannelGroup;
390 /** A generic device, either hardware or virtual */
391 class SR_API Device : public Configurable
394 /** Vendor name for this device. */
395 string vendor() const;
396 /** Model name for this device. */
397 string model() const;
398 /** Version string for this device. */
399 string version() const;
400 /** Serial number for this device. */
401 string serial_number() const;
402 /** Connection ID for this device. */
403 string connection_id() const;
404 /** List of the channels available on this device. */
405 vector<shared_ptr<Channel> > channels();
406 /** Channel groups available on this device, indexed by name. */
407 map<string, shared_ptr<ChannelGroup> > channel_groups();
413 explicit Device(struct sr_dev_inst *structure);
415 virtual shared_ptr<Device> get_shared_from_this() = 0;
416 shared_ptr<Channel> get_channel(struct sr_channel *ptr);
418 struct sr_dev_inst *_structure;
419 map<struct sr_channel *, Channel *> _channels;
421 map<string, ChannelGroup *> _channel_groups;
422 /** Deleter needed to allow shared_ptr use with protected destructor. */
426 void operator()(Device *device) { delete device; }
428 friend class Deleter;
429 friend class Session;
430 friend class Channel;
431 friend class ChannelGroup;
436 /** A real hardware device, connected via a driver */
437 class SR_API HardwareDevice :
438 public UserOwned<HardwareDevice, struct sr_dev_inst>,
442 /** Driver providing this device. */
443 shared_ptr<Driver> driver();
445 HardwareDevice(shared_ptr<Driver> driver, struct sr_dev_inst *structure);
447 shared_ptr<Device> get_shared_from_this();
448 shared_ptr<Driver> _driver;
449 /** Deleter needed to allow shared_ptr use with protected destructor. */
453 void operator()(HardwareDevice *device) { delete device; }
455 friend class Deleter;
457 friend class ChannelGroup;
460 /** A virtual device, created by the user */
461 class SR_API UserDevice :
462 public UserOwned<UserDevice, struct sr_dev_inst>,
466 /** Add a new channel to this device. */
467 shared_ptr<Channel> add_channel(unsigned int index, const ChannelType *type, string name);
469 UserDevice(string vendor, string model, string version);
471 shared_ptr<Device> get_shared_from_this();
472 /** Deleter needed to allow shared_ptr use with protected destructor. */
476 void operator()(UserDevice *device) { delete device; }
478 friend class Context;
479 friend class Deleter;
482 /** A channel on a device */
483 class SR_API Channel :
484 public ParentOwned<Channel, Device, struct sr_channel>
487 /** Current name of this channel. */
489 /** Set the name of this channel. *
490 * @param name Name string to set. */
491 void set_name(string name);
492 /** Type of this channel. */
493 const ChannelType *type() const;
494 /** Enabled status of this channel. */
495 bool enabled() const;
496 /** Set the enabled status of this channel.
497 * @param value Boolean value to set. */
498 void set_enabled(bool value);
499 /** Get the index number of this channel. */
500 unsigned int index() const;
502 explicit Channel(struct sr_channel *structure);
504 const ChannelType * const _type;
506 friend class UserDevice;
507 friend class ChannelGroup;
508 friend class Session;
509 friend class TriggerStage;
510 friend class Context;
513 /** A group of channels on a device, which share some configuration */
514 class SR_API ChannelGroup :
515 public ParentOwned<ChannelGroup, Device, struct sr_channel_group>,
519 /** Name of this channel group. */
521 /** List of the channels in this group. */
522 vector<shared_ptr<Channel> > channels();
524 ChannelGroup(Device *device, struct sr_channel_group *structure);
526 vector<Channel *> _channels;
530 /** A trigger configuration */
531 class SR_API Trigger : public UserOwned<Trigger, struct sr_trigger>
534 /** Name of this trigger configuration. */
536 /** List of the stages in this trigger. */
537 vector<shared_ptr<TriggerStage> > stages();
538 /** Add a new stage to this trigger. */
539 shared_ptr<TriggerStage> add_stage();
541 Trigger(shared_ptr<Context> context, string name);
543 shared_ptr<Context> _context;
544 vector<TriggerStage *> _stages;
545 friend class Deleter;
546 friend class Context;
547 friend class Session;
550 /** A stage in a trigger configuration */
551 class SR_API TriggerStage :
552 public ParentOwned<TriggerStage, Trigger, struct sr_trigger_stage>
555 /** Index number of this stage. */
557 /** List of match conditions on this stage. */
558 vector<shared_ptr<TriggerMatch> > matches();
559 /** Add a new match condition to this stage.
560 * @param channel Channel to match on.
561 * @param type TriggerMatchType to apply. */
562 void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type);
563 /** Add a new match condition to this stage.
564 * @param channel Channel to match on.
565 * @param type TriggerMatchType to apply.
566 * @param value Threshold value. */
567 void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type, float value);
569 vector<TriggerMatch *> _matches;
570 explicit TriggerStage(struct sr_trigger_stage *structure);
572 friend class Trigger;
575 /** A match condition in a trigger configuration */
576 class SR_API TriggerMatch :
577 public ParentOwned<TriggerMatch, TriggerStage, struct sr_trigger_match>
580 /** Channel this condition matches on. */
581 shared_ptr<Channel> channel();
582 /** Type of match. */
583 const TriggerMatchType *type() const;
584 /** Threshold value. */
587 TriggerMatch(struct sr_trigger_match *structure, shared_ptr<Channel> channel);
589 shared_ptr<Channel> _channel;
590 friend class TriggerStage;
593 /** Type of session stopped callback */
594 typedef function<void()> SessionStoppedCallback;
596 /** Type of datafeed callback */
597 typedef function<void(shared_ptr<Device>, shared_ptr<Packet>)>
598 DatafeedCallbackFunction;
600 /* Data required for C callback function to call a C++ datafeed callback */
601 class SR_PRIV DatafeedCallbackData
604 void run(const struct sr_dev_inst *sdi,
605 const struct sr_datafeed_packet *pkt);
607 DatafeedCallbackFunction _callback;
608 DatafeedCallbackData(Session *session,
609 DatafeedCallbackFunction callback);
611 friend class Session;
614 /** A virtual device associated with a stored session */
615 class SR_API SessionDevice :
616 public ParentOwned<SessionDevice, Session, struct sr_dev_inst>,
620 explicit SessionDevice(struct sr_dev_inst *sdi);
622 shared_ptr<Device> get_shared_from_this();
623 /** Deleter needed to allow shared_ptr use with protected destructor. */
627 void operator()(SessionDevice *device) { delete device; }
629 friend class Deleter;
630 friend class Session;
633 /** A sigrok session */
634 class SR_API Session : public UserOwned<Session, struct sr_session>
637 /** Add a device to this session.
638 * @param device Device to add. */
639 void add_device(shared_ptr<Device> device);
640 /** List devices attached to this session. */
641 vector<shared_ptr<Device> > devices();
642 /** Remove all devices from this session. */
643 void remove_devices();
644 /** Add a datafeed callback to this session.
645 * @param callback Callback of the form callback(Device, Packet). */
646 void add_datafeed_callback(DatafeedCallbackFunction callback);
647 /** Remove all datafeed callbacks from this session. */
648 void remove_datafeed_callbacks();
649 /** Start the session. */
651 /** Run the session event loop. */
653 /** Stop the session. */
655 /** Return whether the session is running. */
656 bool is_running() const;
657 /** Set callback to be invoked on session stop. */
658 void set_stopped_callback(SessionStoppedCallback callback);
659 /** Get current trigger setting. */
660 shared_ptr<Trigger> trigger();
661 /** Get the context. */
662 shared_ptr<Context> context();
663 /** Set trigger setting.
664 * @param trigger Trigger object to use. */
665 void set_trigger(shared_ptr<Trigger> trigger);
666 /** Get filename this session was loaded from. */
667 string filename() const;
669 explicit Session(shared_ptr<Context> context);
670 Session(shared_ptr<Context> context, string filename);
672 shared_ptr<Device> get_device(const struct sr_dev_inst *sdi);
673 const shared_ptr<Context> _context;
674 map<const struct sr_dev_inst *, SessionDevice *> _owned_devices;
675 map<const struct sr_dev_inst *, shared_ptr<Device> > _other_devices;
676 vector<DatafeedCallbackData *> _datafeed_callbacks;
677 SessionStoppedCallback _stopped_callback;
679 shared_ptr<Trigger> _trigger;
680 friend class Deleter;
681 friend class Context;
682 friend class DatafeedCallbackData;
683 friend class SessionDevice;
686 /** A packet on the session datafeed */
687 class SR_API Packet : public UserOwned<Packet, const struct sr_datafeed_packet>
690 /** Type of this packet. */
691 const PacketType *type() const;
692 /** Payload of this packet. */
693 shared_ptr<PacketPayload> payload();
695 Packet(shared_ptr<Device> device,
696 const struct sr_datafeed_packet *structure);
698 shared_ptr<Device> _device;
699 PacketPayload *_payload;
700 friend class Deleter;
701 friend class Session;
703 friend class DatafeedCallbackData;
708 friend class Context;
711 /** Abstract base class for datafeed packet payloads */
712 class SR_API PacketPayload
716 virtual ~PacketPayload() = 0;
717 virtual shared_ptr<PacketPayload> get_shared_pointer(Packet *parent) = 0;
719 friend class Deleter;
724 /** Payload of a datafeed header packet */
725 class SR_API Header :
726 public ParentOwned<Header, Packet, const struct sr_datafeed_header>,
730 /* Feed version number. */
731 int feed_version() const;
732 /* Start time of this session. */
733 Glib::TimeVal start_time() const;
735 explicit Header(const struct sr_datafeed_header *structure);
737 shared_ptr<PacketPayload> get_shared_pointer(Packet *parent);
741 /** Payload of a datafeed metadata packet */
743 public ParentOwned<Meta, Packet, const struct sr_datafeed_meta>,
747 /* Mapping of (ConfigKey, value) pairs. */
748 map<const ConfigKey *, Glib::VariantBase> config() const;
750 explicit Meta(const struct sr_datafeed_meta *structure);
752 shared_ptr<PacketPayload> get_shared_pointer(Packet *parent);
753 map<const ConfigKey *, Glib::VariantBase> _config;
757 /** Payload of a datafeed packet with logic data */
759 public ParentOwned<Logic, Packet, const struct sr_datafeed_logic>,
763 /* Pointer to data. */
764 void *data_pointer();
765 /* Data length in bytes. */
766 size_t data_length() const;
767 /* Size of each sample in bytes. */
768 unsigned int unit_size() const;
770 explicit Logic(const struct sr_datafeed_logic *structure);
772 shared_ptr<PacketPayload> get_shared_pointer(Packet *parent);
776 /** Payload of a datafeed packet with analog data */
777 class SR_API Analog :
778 public ParentOwned<Analog, Packet, const struct sr_datafeed_analog>,
782 /** Pointer to data. */
783 void *data_pointer();
784 /** Number of samples in this packet. */
785 unsigned int num_samples() const;
786 /** Channels for which this packet contains data. */
787 vector<shared_ptr<Channel> > channels();
788 /** Measured quantity of the samples in this packet. */
789 const Quantity *mq() const;
790 /** Unit of the samples in this packet. */
791 const Unit *unit() const;
792 /** Measurement flags associated with the samples in this packet. */
793 vector<const QuantityFlag *> mq_flags() const;
795 explicit Analog(const struct sr_datafeed_analog *structure);
797 shared_ptr<PacketPayload> get_shared_pointer(Packet *parent);
801 /** An input format supported by the library */
802 class SR_API InputFormat :
803 public ParentOwned<InputFormat, Context, const struct sr_input_module>
806 /** Name of this input format. */
808 /** Description of this input format. */
809 string description() const;
810 /** A list of preferred file name extensions for this file format.
811 * @note This list is a recommendation only. */
812 vector<string> extensions() const;
813 /** Options supported by this input format. */
814 map<string, shared_ptr<Option> > options();
815 /** Create an input using this input format.
816 * @param options Mapping of (option name, value) pairs. */
817 shared_ptr<Input> create_input(const map<string, Glib::VariantBase> &options = {});
819 explicit InputFormat(const struct sr_input_module *structure);
821 friend class Context;
822 friend class InputDevice;
825 /** An input instance (an input format applied to a file or stream) */
826 class SR_API Input : public UserOwned<Input, const struct sr_input>
829 /** Virtual device associated with this input. */
830 shared_ptr<InputDevice> device();
831 /** Send next stream data.
832 * @param data Next stream data.
833 * @param length Length of data. */
834 void send(void *data, size_t length);
835 /** Signal end of input data. */
838 Input(shared_ptr<Context> context, const struct sr_input *structure);
840 shared_ptr<Context> _context;
841 InputDevice *_device;
842 friend class Deleter;
843 friend class Context;
844 friend class InputFormat;
847 /** A virtual device associated with an input */
848 class SR_API InputDevice :
849 public ParentOwned<InputDevice, Input, struct sr_dev_inst>,
853 InputDevice(shared_ptr<Input> input, struct sr_dev_inst *sdi);
855 shared_ptr<Device> get_shared_from_this();
856 shared_ptr<Input> _input;
860 /** An option used by an output format */
861 class SR_API Option : public UserOwned<Option, const struct sr_option>
864 /** Short name of this option suitable for command line usage. */
866 /** Short name of this option suitable for GUI usage. */
868 /** Description of this option in a sentence. */
869 string description() const;
870 /** Default value for this option. */
871 Glib::VariantBase default_value() const;
872 /** Possible values for this option, if a limited set. */
873 vector<Glib::VariantBase> values() const;
875 Option(const struct sr_option *structure,
876 shared_ptr<const struct sr_option *> structure_array);
878 shared_ptr<const struct sr_option *> _structure_array;
879 friend class Deleter;
880 friend class InputFormat;
881 friend class OutputFormat;
884 /** An output format supported by the library */
885 class SR_API OutputFormat :
886 public ParentOwned<OutputFormat, Context, const struct sr_output_module>
889 /** Name of this output format. */
891 /** Description of this output format. */
892 string description() const;
893 /** A list of preferred file name extensions for this file format.
894 * @note This list is a recommendation only. */
895 vector<string> extensions() const;
896 /** Options supported by this output format. */
897 map<string, shared_ptr<Option> > options();
898 /** Create an output using this format.
899 * @param device Device to output for.
900 * @param options Mapping of (option name, value) pairs. */
901 shared_ptr<Output> create_output(
902 shared_ptr<Device> device,
903 const map<string, Glib::VariantBase> &options = {});
904 /** Create an output using this format.
905 * @param filename Name of destination file.
906 * @param device Device to output for.
907 * @param options Mapping of (option name, value) pairs. */
908 shared_ptr<Output> create_output(string filename,
909 shared_ptr<Device> device,
910 const map<string, Glib::VariantBase> &options = {});
912 * Checks whether a given flag is set.
913 * @param flag Flag to check
914 * @return true if flag is set for this module
915 * @see sr_output_flags
917 bool test_flag(const OutputFlag *flag) const;
919 explicit OutputFormat(const struct sr_output_module *structure);
921 friend class Context;
925 /** An output instance (an output format applied to a device) */
926 class SR_API Output : public UserOwned<Output, const struct sr_output>
929 /** Update output with data from the given packet.
930 * @param packet Packet to handle. */
931 string receive(shared_ptr<Packet> packet);
933 Output(shared_ptr<OutputFormat> format, shared_ptr<Device> device);
934 Output(shared_ptr<OutputFormat> format,
935 shared_ptr<Device> device, const map<string, Glib::VariantBase> &options);
936 Output(string filename, shared_ptr<OutputFormat> format,
937 shared_ptr<Device> device, const map<string, Glib::VariantBase> &options);
939 const shared_ptr<OutputFormat> _format;
940 const shared_ptr<Device> _device;
941 const map<string, Glib::VariantBase> _options;
942 friend class Deleter;
943 friend class OutputFormat;
946 /** Base class for objects which wrap an enumeration value from libsigrok */
947 template <class Class, typename Enum> class SR_API EnumValue
950 /** The integer constant associated with this value. */
953 return static_cast<int>(_id);
955 /** The name associated with this value. */
960 /** Get value associated with a given integer constant. */
961 static const Class *get(int id)
963 const auto pos = _values.find(static_cast<Enum>(id));
964 if (pos == _values.end())
965 throw Error(SR_ERR_ARG);
968 /** Get possible values. */
969 static std::vector<const Class *> values()
971 std::vector<const Class *> result;
972 for (auto entry : _values)
973 result.push_back(entry.second);
977 EnumValue(Enum id, const char name[]) : _id(id), _name(name)
984 static const std::map<const Enum, const Class * const> _values;
989 #include <libsigrokcxx/enums.hpp>