XvSelectVideoNotify – enable or disable VideoNotify events Synopsis #include <X11/extensions/Xvlib.h> int XvSelectVideoNotify(Display *dpy, Drawable drawable, Bool onoff); Arguments dpy Specifies the connection to the X server. drawable Defines the drawable in which video activity is to be reported. onoff Selects whether video notification is enabled or disabled. Description XvSelectVideoNotify(3) enables or disables XvVideoNotify(3) events to…
XvSelectPortNotify – enable or disable XvPortNotify events Synopsis #include <X11/extensions/Xvlib.h> int XvSelectPortNotify(Display *dpy, XvPortID port, Bool onoff); Arguments dpy Specifies the connection to the X server. port Specifies the port for which PortNotify events are to be generated when its attributes are changed using XvSetPortAttribute(3) onoff Specifies whether notification is to be enabled or disabled….
XvQueryPortAttributes – return list of attributes of a video port Synopsis #include <X11/extensions/Xvlib.h> XvAttribute* XvQueryPortAttributes(Display *dpy, XvPortID port, int *p_num_attributes); Arguments dpy Specifies the connection to the X server. port Specifies the port whose adaptor is to be queried for its list of attributes. p_num_attributes A pointer to where the number of attributes returned in…
XvQueryExtension – return version and release of extension Synopsis #include <X11/extensions/Xvlib.h> int XvQueryExtension(Display *dpy, unsigned int *p_version, unsigned int *p_revision, unsigned int *p_request_base, unsigned int *p_event_base, unsigned int *p_error_base); Arguments dpy Specifies the connection to the X server. p_version Pointer to where the current version number of the Xv video extension is written. p_revision Pointer…
XvQueryEncodings – return list of encodings for an adaptor Synopsis #include <X11/extensions/Xvlib.h> int XvQueryEncodings(Display *dpy, XvPortID port, unsigned int *p_num_encodings, XvEncodingInfo **pp_encoding_info); Arguments dpy Specifies the connection to the X server. port Specifies the port whose adaptor is to be queried for its list of encodings. p_num_encodings A pointer to where the number of encodings…
XvQueryBestSize – determine the optimum drawable region size Synopsis #include <X11/extensions/Xvlib.h> int XvQueryBestSize(Display *dpy, XvPort port, Bool motion, unsigned int vw, unsigned int vh, unsigned int dw, unsigned int dh, unsigned int *p_dw, unsigned int *p_dh); Arguments dpy Specifies the connection to the X server. port Defines the port associated with the display and adaptor…
XvQueryAdaptors – return adaptor information for a screen Synopsis #include <X11/extensions/Xvlib.h> int XvQueryAdaptors(Display *dpy, Window window, unsigned int *p_num_adaptors, XvAdaptorInfo **pp_adaptor_info); Arguments dpy Specifies the connection to the X server. window Specifies a window of the screen for which the adaptor information is desired. p_num_adaptors A pointer to where the number of adaptors for the…
XvPutVideo – write video into a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvPutVideo(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the port from which to…
XvPutStill – write a single frame of video to a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvPutStill(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the…
XvPutImage, XvShmPutImage – display an XvImage Synopsis #include <X11/extensions/Xvlib.h> int XvPutImage (Display *dpy, XvPortID port, Drawable d, GC gc, XvImage *image, int src_x, int src_y, unsigned int src_w, unsigned int src_h, int dest_x, int dest_y, unsigned int dest_w, unsigned int dest_h); int XvShmPutImage (Display *dpy, XvPortID port, Drawable d, GC gc, XvImage *image, int src_x,…
XvPortNotify – event generated when port attributes change Synopsis #include <X11/extensions/Xvlib.h> typedef union { int type; XvVideoNotifyEvent xvvideo; XvPortNotifyEvent xvport; long pad[24]; } XvEvent; typedef struct { int type; unsigned long serial; Bool send_event; Display *display; XvPortID port_id; Time time; Atom attribute; long value; } XvPortNotifyEvent; type Specifies the type of event: XvPortNotify. serial Number of the last request processed…
XvListImageFormats – return list of image formats supported by a video port Syntax #include <X11/extensions/Xvlib.h> XvImageFormatValues * XvListImageFormats (Display *dpy, XvPortID port, int *p_num_formats); Arguments dpy Specifies the connection to the X server. port Specifies the port whose adaptor is to be queried for its list of attributes. p_num_formats A pointer to where the number…
XvGrabPort – lock port for exclusive use by client Synopsis #include <X11/extensions/Xvlib.h> int XvGrabPort(Display *dpy, XvPortID port, Time time); Arguments dpy Specifies the connection to the X server. port Defines the port to be grabbed. time Specifies the request timestamp. Description XvGrabPort(3) grabs a port. Once a client grabs a port, only that client can…
XvGetVideo – capture video from a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvGetVideo(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the port to which video…
XvGetStill – capture a single frame of video from a drawable Synopsis #include <X11/extensions/Xvlib.h> int XvGetStill(Display *dpy, XvPortID port, Drawable d, GC gc, int vx, int vy, unsigned int vw, unsigned int vh, int dx, int dy, unsigned int dw, unsigned int dh); Arguments dpy Specifies the connection to the X server. port Defines the…
XvGetPortAttribute – return current port attribute value Synopsis #include <X11/extensions/Xvlib.h> int XvGetPortAttribute(Display *dpy, XvPortID port, Atom attribute, int p_value); Arguments dpy Specifies the connection to the X server. port Specifies the port, associated with the given display, for which the attribute values are to be returned. attribute An atom that identifies the attribute to be…
XvFreeEncodingInfo – free encoding information Synopsis void XvFreeEncodingInfo(XvEncodingInfo *p_encoding_info); Arguments p_encoding_info Pointer to where the encoding information is located. Description XvFreeEncodingInfo(3) frees encoding information that was returned by XvQueryEncodings(3). The data structure used for encoding information is defined in the reference page for XvQueryEncodings(3). See Also XvQueryEncodings(3)
XvFreeAdaptorInfo – free adaptor information Synopsis void XvFreeAdaptorInfo(XvAdaptorInfo *p_adaptor_info); Arguments p_adaptor_info Pointer to where the adaptor information is located. Description XvFreeAdaptorInfo(3) frees adaptor information that was returned by XvQueryAdaptors(3). The data structure used for adaptor information is defined in the reference page for XvQueryAdaptors(3). See Also XvQueryAdaptors(3), XvFreeEncodingInfo(3)
XvCreateImage, XvShmCreateImage – create an XvImage Synopsis #include <X11/extensions/Xvlib.h> XvImage * XvCreateImage (Display *dpy, XvPortID port, int id, char *data, int width, int height); XvImage * XvShmCreateImage (Display *dpy, XvPortID port, int id, char *data, int width, int height, XShmSegmentInfo *shminfo); Arguments dpy Specifies the connection to the X server. port Specifies the port the…
Xv – X Window System video extension Description The X Video Extension (Xv) extension provides support for video adaptors attached to an X display. It takes the approach that a display may have one or more video adaptors, each of which has one or more ports through which independent video streams pass. An adaptor may…