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WebcamVideo Class Referenceabstract

Allows you to open a webcam or other video capture device as a video stream. More...

#include "webcamVideo.h"

Inheritance diagram for WebcamVideo:
MovieVideo TypedWritableReferenceCount Namable TypedWritable ReferenceCount MemoryBase TypedObject MemoryBase MemoryBase

Public Member Functions

virtual TypeHandle force_init_type ()
 
double get_fps () const
 Returns the camera's framerate. More...
 
const 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
 
 MAKE_SEQ (get_options, get_num_options, get_option)
 
void output (ostream &out) const
 Outputs the WebcamVideo. More...
 
virtual PT (MovieVideoCursor) open()=0
 
- Public Member Functions inherited from MovieVideo
 MovieVideo (const 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 Filenameget_filename () const
 Returns the movie's filename. More...
 
const SubfileInfoget_subfile_info () const
 If the movie is to be loaded from a subfile on disk, this returns the subfile info. More...
 
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 &copy)
 
virtual ReferenceCountas_reference_count ()
 Returns the pointer cast to a ReferenceCount pointer, if it is in fact of that type. More...
 
void operator= (const TypedWritableReferenceCount &copy)
 
- Public Member Functions inherited from TypedWritable
 TypedWritable (const TypedWritable &copy)
 
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...
 
string encode_to_bam_stream () const
 Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a string string. More...
 
bool encode_to_bam_stream (string &data, BamWriter *writer=NULL) 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 &copy)
 
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 &copy)
 
TypedObjectas_typed_object ()
 Returns the object, upcast (if necessary) to a TypedObject pointer. More...
 
const TypedObjectas_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...
 
void operator= (const TypedObject &copy)
 
- Public Member Functions inherited from ReferenceCount
int get_ref_count () const
 Returns the current reference count. More...
 
WeakReferenceListget_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 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...
 
void weak_ref (WeakPointerToVoid *ptv)
 Adds the indicated PointerToVoid as a weak reference to this object. More...
 
void weak_unref (WeakPointerToVoid *ptv)
 Removes the indicated PointerToVoid as a weak reference to this object. More...
 
- Public Member Functions inherited from Namable
 Namable (const string &initial_name="")
 
 Namable (const Namable &copy)
 
void clear_name ()
 Resets the Namable's name to empty. More...
 
const 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...
 
Namableoperator= (const Namable &other)
 
void output (ostream &out) const
 Outputs the Namable. More...
 
void set_name (const 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 ()
 Returns the number of webcam options. More...
 
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(const string &data
 
- Static Public Member Functions inherited from TypedWritable
static bool decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, const string &data, BamReader *reader=NULL)
 Reads the string created by a previous call to encode_to_bam_stream(), and extracts the single object on that string. 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 ()
 

Additional Inherited Members

- Public Attributes inherited from TypedWritableReferenceCount
static BamReaderreader = NULL)
 
- Static Public Attributes inherited from TypedWritable
static TypedWritable *const Null = (TypedWritable*)0L
 

Detailed Description

Allows you to open a webcam or other video capture device as a video stream.

Definition at line 25 of file webcamVideo.h.

Member Function Documentation

void WebcamVideo::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 48 of file webcamVideo.cxx.

Referenced by get_num_options().

double WebcamVideo::get_fps ( ) const
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 44 of file webcamVideo.I.

Referenced by output().

int WebcamVideo::get_num_options ( )
static

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 78 of file webcamVideo.cxx.

References find_all_webcams().

const string & WebcamVideo::get_pixel_format ( ) const
inline

Returns the camera's pixel format, as a FourCC code, if known.

Definition at line 55 of file webcamVideo.I.

int WebcamVideo::get_size_x ( ) const
inline

Returns the camera's size_x.

Definition at line 22 of file webcamVideo.I.

Referenced by output().

int WebcamVideo::get_size_y ( ) const
inline

Returns the camera's size_y.

Definition at line 32 of file webcamVideo.I.

Referenced by output().

void WebcamVideo::output ( ostream &  out) const
inline

Outputs the WebcamVideo.

This function simply writes the name, size and FPS to the output stream.

Definition at line 66 of file webcamVideo.I.

References get_fps(), get_size_x(), and get_size_y().


The documentation for this class was generated from the following files: