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)
167 /* Note, this implementation will create a new smart_ptr if none exists. */
168 shared_ptr<Class> shared_from_this()
170 shared_ptr<Class> shared = _weak_this.lock();
174 shared.reset(static_cast<Class *>(this), &reset_parent);
181 shared_ptr<Class> get_shared_pointer(shared_ptr<Parent> parent)
184 throw Error(SR_ERR_BUG);
185 this->_parent = parent;
186 return shared_from_this();
190 /* Get parent object that owns this object. */
191 shared_ptr<Parent> parent()
197 /* Base template for classes whose resources are owned by the user. */
198 template <class Class, typename Struct>
199 class SR_API UserOwned : public enable_shared_from_this<Class>
204 explicit UserOwned(Struct *structure) :
205 _structure(structure)
209 shared_ptr<Class> shared_from_this()
211 auto shared = enable_shared_from_this<Class>::shared_from_this();
213 throw Error(SR_ERR_BUG);
217 /* Deleter needed to allow shared_ptr use with protected destructor. */
221 void operator()(Class *object) { delete object; }
225 /** Type of log callback */
226 typedef function<void(const LogLevel *, string message)> LogCallbackFunction;
228 /** Resource reader delegate. */
229 class SR_API ResourceReader
233 virtual ~ResourceReader();
235 /** Resource open hook. */
236 virtual void open(struct sr_resource *res, string name) = 0;
237 /** Resource close hook. */
238 virtual void close(struct sr_resource *res) = 0;
239 /** Resource read hook. */
240 virtual size_t read(const struct sr_resource *res, void *buf, size_t count) = 0;
242 static SR_PRIV int open_callback(struct sr_resource *res,
243 const char *name, void *cb_data) noexcept;
244 static SR_PRIV int close_callback(struct sr_resource *res,
245 void *cb_data) noexcept;
246 static SR_PRIV ssize_t read_callback(const struct sr_resource *res,
247 void *buf, size_t count, void *cb_data) noexcept;
248 friend class Context;
251 /** The global libsigrok context */
252 class SR_API Context : public UserOwned<Context, struct sr_context>
255 /** Create new context */
256 static shared_ptr<Context> create();
257 /** libsigrok package version. */
258 static string package_version();
259 /** libsigrok library version. */
260 static string lib_version();
261 /** Available hardware drivers, indexed by name. */
262 map<string, shared_ptr<Driver> > drivers();
263 /** Available input formats, indexed by name. */
264 map<string, shared_ptr<InputFormat> > input_formats();
265 /** Available output formats, indexed by name. */
266 map<string, shared_ptr<OutputFormat> > output_formats();
267 /** Current log level. */
268 const LogLevel *log_level() const;
269 /** Set the log level.
270 * @param level LogLevel to use. */
271 void set_log_level(const LogLevel *level);
272 /** Set the log callback.
273 * @param callback Callback of the form callback(LogLevel, string). */
274 void set_log_callback(LogCallbackFunction callback);
275 /** Set the log callback to the default handler. */
276 void set_log_callback_default();
277 /** Install a delegate for reading resource files.
278 * @param reader The resource reader delegate, or nullptr to unset. */
279 void set_resource_reader(ResourceReader *reader);
280 /** Create a new session. */
281 shared_ptr<Session> create_session();
282 /** Create a new user device. */
283 shared_ptr<UserDevice> create_user_device(
284 string vendor, string model, string version);
285 /** Create a header packet. */
286 shared_ptr<Packet> create_header_packet(Glib::TimeVal start_time);
287 /** Create a meta packet. */
288 shared_ptr<Packet> create_meta_packet(
289 const map<const ConfigKey *, Glib::VariantBase> &config);
290 /** Create a logic packet. */
291 shared_ptr<Packet> create_logic_packet(
292 void *data_pointer, size_t data_length, unsigned int unit_size);
293 /** Create an analog packet. */
294 shared_ptr<Packet> create_analog_packet(
295 const vector<shared_ptr<Channel> > &channels,
296 float *data_pointer, unsigned int num_samples, const Quantity *mq,
297 const Unit *unit, const vector<const QuantityFlag *> &mqflags);
298 /** Load a saved session.
299 * @param filename File name string. */
300 shared_ptr<Session> load_session(string filename);
301 /** Create a new trigger.
302 * @param name Name string for new trigger. */
303 shared_ptr<Trigger> create_trigger(string name);
304 /** Open an input file.
305 * @param filename File name string. */
306 shared_ptr<Input> open_file(string filename);
307 /** Open an input stream based on header data.
308 * @param header Initial data from stream. */
309 shared_ptr<Input> open_stream(string header);
310 map<string, string> serials(shared_ptr<Driver> driver) const;
312 map<string, Driver *> _drivers;
313 map<string, InputFormat *> _input_formats;
314 map<string, OutputFormat *> _output_formats;
316 LogCallbackFunction _log_callback;
319 friend class Deleter;
320 friend class Session;
330 /** An object that can be configured. */
331 class SR_API Configurable
334 /** Read configuration for the given key.
335 * @param key ConfigKey to read. */
336 Glib::VariantBase config_get(const ConfigKey *key) const;
337 /** Set configuration for the given key to a specified value.
338 * @param key ConfigKey to set.
339 * @param value Value to set. */
340 void config_set(const ConfigKey *key, const Glib::VariantBase &value);
341 /** Enumerate available values for the given configuration key.
342 * @param key ConfigKey to enumerate values for. */
343 Glib::VariantContainerBase config_list(const ConfigKey *key) const;
344 /** Enumerate available keys, according to a given index key. */
345 map<const ConfigKey *, set<Capability> > config_keys(const ConfigKey *key);
346 /** Check for a key in the list from a given index key. */
347 bool config_check(const ConfigKey *key, const ConfigKey *index_key) const;
350 struct sr_dev_driver *driver,
351 struct sr_dev_inst *sdi,
352 struct sr_channel_group *channel_group);
353 virtual ~Configurable();
354 struct sr_dev_driver *config_driver;
355 struct sr_dev_inst *config_sdi;
356 struct sr_channel_group *config_channel_group;
359 /** A hardware driver provided by the library */
360 class SR_API Driver :
361 public ParentOwned<Driver, Context, struct sr_dev_driver>,
365 /** Name of this driver. */
367 /** Long name for this driver. */
368 string long_name() const;
369 /** Scan for devices and return a list of devices found.
370 * @param options Mapping of (ConfigKey, value) pairs. */
371 vector<shared_ptr<HardwareDevice> > scan(
372 const map<const ConfigKey *, Glib::VariantBase> &options = {});
375 vector<HardwareDevice *> _devices;
376 explicit Driver(struct sr_dev_driver *structure);
378 friend class Context;
379 friend class HardwareDevice;
380 friend class ChannelGroup;
383 /** A generic device, either hardware or virtual */
384 class SR_API Device : public Configurable
387 /** Vendor name for this device. */
388 string vendor() const;
389 /** Model name for this device. */
390 string model() const;
391 /** Version string for this device. */
392 string version() const;
393 /** Serial number for this device. */
394 string serial_number() const;
395 /** Connection ID for this device. */
396 string connection_id() const;
397 /** List of the channels available on this device. */
398 vector<shared_ptr<Channel> > channels();
399 /** Channel groups available on this device, indexed by name. */
400 map<string, shared_ptr<ChannelGroup> > channel_groups();
406 explicit Device(struct sr_dev_inst *structure);
408 virtual shared_ptr<Device> get_shared_from_this() = 0;
409 shared_ptr<Channel> get_channel(struct sr_channel *ptr);
411 struct sr_dev_inst *_structure;
412 map<struct sr_channel *, Channel *> _channels;
414 map<string, ChannelGroup *> _channel_groups;
415 /** Deleter needed to allow shared_ptr use with protected destructor. */
419 void operator()(Device *device) { delete device; }
421 friend class Deleter;
422 friend class Session;
423 friend class Channel;
424 friend class ChannelGroup;
429 /** A real hardware device, connected via a driver */
430 class SR_API HardwareDevice :
431 public UserOwned<HardwareDevice, struct sr_dev_inst>,
435 /** Driver providing this device. */
436 shared_ptr<Driver> driver();
438 HardwareDevice(shared_ptr<Driver> driver, struct sr_dev_inst *structure);
440 shared_ptr<Device> get_shared_from_this();
441 shared_ptr<Driver> _driver;
442 /** Deleter needed to allow shared_ptr use with protected destructor. */
446 void operator()(HardwareDevice *device) { delete device; }
448 friend class Deleter;
450 friend class ChannelGroup;
453 /** A virtual device, created by the user */
454 class SR_API UserDevice :
455 public UserOwned<UserDevice, struct sr_dev_inst>,
459 /** Add a new channel to this device. */
460 shared_ptr<Channel> add_channel(unsigned int index, const ChannelType *type, string name);
462 UserDevice(string vendor, string model, string version);
464 shared_ptr<Device> get_shared_from_this();
465 /** Deleter needed to allow shared_ptr use with protected destructor. */
469 void operator()(UserDevice *device) { delete device; }
471 friend class Context;
472 friend class Deleter;
475 /** A channel on a device */
476 class SR_API Channel :
477 public ParentOwned<Channel, Device, struct sr_channel>
480 /** Current name of this channel. */
482 /** Set the name of this channel. *
483 * @param name Name string to set. */
484 void set_name(string name);
485 /** Type of this channel. */
486 const ChannelType *type() const;
487 /** Enabled status of this channel. */
488 bool enabled() const;
489 /** Set the enabled status of this channel.
490 * @param value Boolean value to set. */
491 void set_enabled(bool value);
492 /** Get the index number of this channel. */
493 unsigned int index() const;
495 explicit Channel(struct sr_channel *structure);
497 const ChannelType * const _type;
499 friend class UserDevice;
500 friend class ChannelGroup;
501 friend class Session;
502 friend class TriggerStage;
503 friend class Context;
506 /** A group of channels on a device, which share some configuration */
507 class SR_API ChannelGroup :
508 public ParentOwned<ChannelGroup, Device, struct sr_channel_group>,
512 /** Name of this channel group. */
514 /** List of the channels in this group. */
515 vector<shared_ptr<Channel> > channels();
517 ChannelGroup(Device *device, struct sr_channel_group *structure);
519 vector<Channel *> _channels;
523 /** A trigger configuration */
524 class SR_API Trigger : public UserOwned<Trigger, struct sr_trigger>
527 /** Name of this trigger configuration. */
529 /** List of the stages in this trigger. */
530 vector<shared_ptr<TriggerStage> > stages();
531 /** Add a new stage to this trigger. */
532 shared_ptr<TriggerStage> add_stage();
534 Trigger(shared_ptr<Context> context, string name);
536 shared_ptr<Context> _context;
537 vector<TriggerStage *> _stages;
538 friend class Deleter;
539 friend class Context;
540 friend class Session;
543 /** A stage in a trigger configuration */
544 class SR_API TriggerStage :
545 public ParentOwned<TriggerStage, Trigger, struct sr_trigger_stage>
548 /** Index number of this stage. */
550 /** List of match conditions on this stage. */
551 vector<shared_ptr<TriggerMatch> > matches();
552 /** Add a new match condition to this stage.
553 * @param channel Channel to match on.
554 * @param type TriggerMatchType to apply. */
555 void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type);
556 /** Add a new match condition to this stage.
557 * @param channel Channel to match on.
558 * @param type TriggerMatchType to apply.
559 * @param value Threshold value. */
560 void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type, float value);
562 vector<TriggerMatch *> _matches;
563 explicit TriggerStage(struct sr_trigger_stage *structure);
565 friend class Trigger;
568 /** A match condition in a trigger configuration */
569 class SR_API TriggerMatch :
570 public ParentOwned<TriggerMatch, TriggerStage, struct sr_trigger_match>
573 /** Channel this condition matches on. */
574 shared_ptr<Channel> channel();
575 /** Type of match. */
576 const TriggerMatchType *type() const;
577 /** Threshold value. */
580 TriggerMatch(struct sr_trigger_match *structure, shared_ptr<Channel> channel);
582 shared_ptr<Channel> _channel;
583 friend class TriggerStage;
586 /** Type of session stopped callback */
587 typedef function<void()> SessionStoppedCallback;
589 /** Type of datafeed callback */
590 typedef function<void(shared_ptr<Device>, shared_ptr<Packet>)>
591 DatafeedCallbackFunction;
593 /* Data required for C callback function to call a C++ datafeed callback */
594 class SR_PRIV DatafeedCallbackData
597 void run(const struct sr_dev_inst *sdi,
598 const struct sr_datafeed_packet *pkt);
600 DatafeedCallbackFunction _callback;
601 DatafeedCallbackData(Session *session,
602 DatafeedCallbackFunction callback);
604 friend class Session;
607 /** A virtual device associated with a stored session */
608 class SR_API SessionDevice :
609 public ParentOwned<SessionDevice, Session, struct sr_dev_inst>,
613 explicit SessionDevice(struct sr_dev_inst *sdi);
615 shared_ptr<Device> get_shared_from_this();
616 /** Deleter needed to allow shared_ptr use with protected destructor. */
620 void operator()(SessionDevice *device) { delete device; }
622 friend class Deleter;
623 friend class Session;
626 /** A sigrok session */
627 class SR_API Session : public UserOwned<Session, struct sr_session>
630 /** Add a device to this session.
631 * @param device Device to add. */
632 void add_device(shared_ptr<Device> device);
633 /** List devices attached to this session. */
634 vector<shared_ptr<Device> > devices();
635 /** Remove all devices from this session. */
636 void remove_devices();
637 /** Add a datafeed callback to this session.
638 * @param callback Callback of the form callback(Device, Packet). */
639 void add_datafeed_callback(DatafeedCallbackFunction callback);
640 /** Remove all datafeed callbacks from this session. */
641 void remove_datafeed_callbacks();
642 /** Start the session. */
644 /** Run the session event loop. */
646 /** Stop the session. */
648 /** Return whether the session is running. */
649 bool is_running() const;
650 /** Set callback to be invoked on session stop. */
651 void set_stopped_callback(SessionStoppedCallback callback);
652 /** Get current trigger setting. */
653 shared_ptr<Trigger> trigger();
654 /** Get the context. */
655 shared_ptr<Context> context();
656 /** Set trigger setting.
657 * @param trigger Trigger object to use. */
658 void set_trigger(shared_ptr<Trigger> trigger);
659 /** Get filename this session was loaded from. */
660 string filename() const;
662 explicit Session(shared_ptr<Context> context);
663 Session(shared_ptr<Context> context, string filename);
665 shared_ptr<Device> get_device(const struct sr_dev_inst *sdi);
666 const shared_ptr<Context> _context;
667 map<const struct sr_dev_inst *, SessionDevice *> _owned_devices;
668 map<const struct sr_dev_inst *, shared_ptr<Device> > _other_devices;
669 vector<DatafeedCallbackData *> _datafeed_callbacks;
670 SessionStoppedCallback _stopped_callback;
672 shared_ptr<Trigger> _trigger;
673 friend class Deleter;
674 friend class Context;
675 friend class DatafeedCallbackData;
676 friend class SessionDevice;
679 /** A packet on the session datafeed */
680 class SR_API Packet : public UserOwned<Packet, const struct sr_datafeed_packet>
683 /** Type of this packet. */
684 const PacketType *type() const;
685 /** Payload of this packet. */
686 shared_ptr<PacketPayload> payload();
688 Packet(shared_ptr<Device> device,
689 const struct sr_datafeed_packet *structure);
691 shared_ptr<Device> _device;
692 PacketPayload *_payload;
693 friend class Deleter;
694 friend class Session;
696 friend class DatafeedCallbackData;
701 friend class Context;
704 /** Abstract base class for datafeed packet payloads */
705 class SR_API PacketPayload
709 virtual ~PacketPayload() = 0;
711 virtual shared_ptr<PacketPayload> get_shared_pointer(shared_ptr<Packet> parent) = 0;
713 /** Deleter needed to allow shared_ptr use with protected destructor. */
717 void operator()(PacketPayload *payload) { delete payload; }
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(shared_ptr<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(shared_ptr<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(shared_ptr<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(shared_ptr<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>