Allows you to open a webcam or other video capture device as a video stream. More...
#include "webcamVideo.h"
Inheritance diagram for WebcamVideo:
Public Member Functions | |
| virtual TypeHandle | force_init_type () |
| double | get_fps () const |
| Returns the camera's framerate. More... | |
| const std::string & | get_pixel_format () const |
| Returns the camera's pixel format, as a FourCC code, if known. More... | |
| int | get_size_x () const |
| Returns the camera's size_x. More... | |
| int | get_size_y () const |
| Returns the camera's size_y. More... | |
| virtual TypeHandle | get_type () const |
| void | output (std::ostream &out) const |
| Outputs the WebcamVideo. More... | |
| virtual | PT (MovieVideoCursor) open()=0 |
 Public Member Functions inherited from MovieVideo | |
| MovieVideo (const std::string &name="Blank Video") | |
| This constructor returns a null video stream — a stream of plain blue and white frames that last one second each. More... | |
| const Filename & | get_filename () const |
| const SubfileInfo & | get_subfile_info () const |
| virtual void | write_datagram (BamWriter *manager, Datagram &dg) |
| Writes the contents of this object to the datagram for shipping out to a Bam file. More... | |
| Public Member Functions inherited from TypedWritableReferenceCount | |
| TypedWritableReferenceCount (const TypedWritableReferenceCount ©) | |
| virtual ReferenceCount * | as_reference_count () |
| Returns the pointer cast to a ReferenceCount pointer, if it is in fact of that type. More... | |
| void | operator= (const TypedWritableReferenceCount ©) |
| Public Member Functions inherited from TypedWritable | |
| TypedWritable (const TypedWritable ©) | |
| virtual int | complete_pointers (TypedWritable **p_list, BamReader *manager) |
| Receives an array of pointers, one for each time manager->read_pointer() was called in fillin(). More... | |
| vector_uchar | encode_to_bam_stream () const |
| Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a bytes object. More... | |
| bool | encode_to_bam_stream (vector_uchar &data, BamWriter *writer=nullptr) const |
| Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. More... | |
| virtual void | finalize (BamReader *manager) |
| Called by the BamReader to perform any final actions needed for setting up the object after all objects have been read and all pointers have been completed. More... | |
| UpdateSeq | get_bam_modified () const |
| Returns the current bam_modified counter. More... | |
| void | mark_bam_modified () |
| Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. More... | |
| void | operator= (const TypedWritable ©) |
| virtual bool | require_fully_complete () const |
| Some objects require all of their nested pointers to have been completed before the objects themselves can be completed. More... | |
| virtual void | update_bam_nested (BamWriter *manager) |
| Called by the BamWriter when this object has not itself been modified recently, but it should check its nested objects for updates. More... | |
| Public Member Functions inherited from TypedObject | |
| TypedObject (const TypedObject ©)=default | |
| TypedObject * | as_typed_object () |
| Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
| const TypedObject * | as_typed_object () const |
| Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
| int | get_best_parent_from_Set (const std::set< int > &) const |
| int | get_type_index () const |
| Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More... | |
| bool | is_exact_type (TypeHandle handle) const |
| Returns true if the current object is the indicated type exactly. More... | |
| bool | is_of_type (TypeHandle handle) const |
| Returns true if the current object is or derives from the indicated type. More... | |
| TypedObject & | operator= (const TypedObject ©)=default |
| Public Member Functions inherited from ReferenceCount | |
| int | get_ref_count () const |
| WeakReferenceList * | get_weak_list () const |
| Returns the WeakReferenceList associated with this ReferenceCount object. More... | |
| bool | has_weak_list () const |
| Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise. More... | |
| void | local_object () |
| This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack. More... | |
| void | ref () const |
| Explicitly increments the reference count. More... | |
| bool | ref_if_nonzero () const |
| Atomically increases the reference count of this object if it is not zero. More... | |
| bool | test_ref_count_integrity () const |
| Does some easy checks to make sure that the reference count isn't completely bogus. More... | |
| bool | test_ref_count_nonzero () const |
| Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More... | |
| virtual bool | unref () const |
| Explicitly decrements the reference count. More... | |
| WeakReferenceList * | weak_ref () |
| Adds the indicated PointerToVoid as a weak reference to this object. More... | |
| void | weak_unref () |
| Removes the indicated PointerToVoid as a weak reference to this object. More... | |
| Public Member Functions inherited from Namable | |
| Namable (const std::string &initial_name="") | |
| void | clear_name () |
| Resets the Namable's name to empty. More... | |
| const std::string & | get_name () const |
| bool | has_name () const |
| Returns true if the Namable has a nonempty name set, false if the name is empty. More... | |
| void | output (std::ostream &out) const |
| Outputs the Namable. More... | |
| void | set_name (const std::string &name) |
Static Public Member Functions | |
| static void | find_all_webcams () |
| Scans the hardware for webcams, and pushes them onto the global list of all webcams. More... | |
| static TypeHandle | get_class_type () |
| static int | get_num_options () |
| static void | init_type () |
| static | PT (WebcamVideo) get_option(int n) |
| Static Public Member Functions inherited from MovieVideo | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| static | PT (MovieVideo) get(const Filename &name) |
| Static Public Member Functions inherited from TypedWritableReferenceCount | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| static | PT (TypedWritableReferenceCount) decode_from_bam_stream(vector_uchar data |
| Static Public Member Functions inherited from TypedWritable | |
| static bool | decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, vector_uchar data, BamReader *reader=nullptr) |
| Reads the bytes created by a previous call to encode_to_bam_stream(), and extracts the single object on those bytes. More... | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from TypedObject | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| This function is declared non-inline to work around a compiler bug in g++ 2.96. More... | |
| Static Public Member Functions inherited from ReferenceCount | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from Namable | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
Public Attributes | |
| get_num_options | |
| Returns the number of webcam options. More... | |
| get_option | |
| Public Attributes inherited from MovieVideo | |
| get_filename | |
| Returns the movie's filename. More... | |
| get_subfile_info | |
| If the movie is to be loaded from a subfile on disk, this returns the subfile info. More... | |
| Public Attributes inherited from TypedWritableReferenceCount | |
| static BamReader * | reader = nullptr) |
| Public Attributes inherited from TypedObject | |
| get_type | |
| Public Attributes inherited from ReferenceCount | |
| get_ref_count | |
| Returns the current reference count. More... | |
| Public Attributes inherited from Namable | |
| get_name | |
| set_name | |
Additional Inherited Members | |
| Static Public Attributes inherited from TypedWritable | |
| static TypedWritable *const | Null = nullptr |
Detailed Description
Allows you to open a webcam or other video capture device as a video stream.
Definition at line 23 of file webcamVideo.h.
Member Function Documentation
◆ find_all_webcams()
|
static |
Scans the hardware for webcams, and pushes them onto the global list of all webcams.
There are several implementations of WebcamVideo, including one based on DirectShow, one based on Video4Linux, and so forth. These implementations are contained in one C++ file each, and they export nothing at all except a single "find_all" function. Otherwise, they can only be accessed through the virtual methods of the WebcamVideo objects they create.
Definition at line 40 of file webcamVideo.cxx.
Referenced by PT().
◆ get_fps()
|
inline |
Returns the camera's framerate.
This is a maximum theoretical: the actual performance will depend on the speed of the hardware.
Definition at line 35 of file webcamVideo.I.
Referenced by output().
◆ get_pixel_format()
|
inline |
Returns the camera's pixel format, as a FourCC code, if known.
Definition at line 43 of file webcamVideo.I.
◆ get_size_x()
|
inline |
◆ get_size_y()
|
inline |
◆ output()
|
inline |
Outputs the WebcamVideo.
This function simply writes the name, size and FPS to the output stream.
Definition at line 52 of file webcamVideo.I.
References get_fps(), get_size_x(), and get_size_y().
Member Data Documentation
◆ get_num_options
| int WebcamVideo::get_num_options |
Returns the number of webcam options.
An "option" consists of a device plus a set of configuration parameters. For example, "Creative Webcam Live at 640x480, 30 fps" is an option.
Definition at line 30 of file webcamVideo.h.
The documentation for this class was generated from the following files:
- panda/src/vision/webcamVideo.h
- panda/src/vision/webcamVideo.cxx
- panda/src/vision/webcamVideo.I
