XvQueryPortAttributes - Online Linux Manual PageSection : 3
Updated : libXv 1.0.11
Source : X Version 11
Note : libXv Functions

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NAMEXvQueryPortAttributes − return list of attributes of a video port

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SYNOPSIS#include <X11/extensions/Xvlib.h> XvAttribute* XvQueryPortAttributes(Display *dpy, XvPortID port, int *p_num_attributes);

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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 the array is written.

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DESCRIPTIONXvQueryPortAttributes(3)returnsthenumberofattributes and an array of XvAttributes valid for the given port. The array may be freed with XFree(3).

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RETURN VALUESXvAttribute has the following structure: typedef struct { int flags; int min_value; int max_value; char *name; } XvAttribute; flags May be XvGettable or XvSettable or both OR'd together indicating the particular attribute is readable, writeable or readable and writeable. min_value The minimum attribute values which are valid for the driver. .IP max_value 8 The maximum attribute values which are valid for the driver. name A string describing the name of the attribute that may be used to retrieve the Atom for the particular attribute.

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DIAGNOSTICS[XvBadPort] Generated if the requested port does not exist.

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SEE ALSOXvGetPortAttribute(3), XvSetPortAttribute(3) 0

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ERROR : Need New Coding :         (rof_IP|5|XvQueryPortAttributes.3|43|4|.IP \fI max_value\fR 8 )    

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