XvQueryPortAttributes3

Usage

XvAttribute* XvQueryPortAttributes(Display *dpy,
                 XvPortID port,  int *p_num_attributes);

Arguments

Overview

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

Return values

XvAttribute 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.

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.

Diagnostics

[XvBadPort]

Generated if the requested port does not exist.