gstreamer/docs/gst/tmpl/gstvalue.sgml
Thomas Vander Stichele e8007886c1 add sizetype tests for fakesrc
Original commit message from CVS:
add sizetype tests for fakesrc
2005-08-05 06:55:03 +00:00

564 lines
7.4 KiB
Text

<!-- ##### SECTION Title ##### -->
GstValue
<!-- ##### SECTION Short_Description ##### -->
GValue implementations specific to GStreamer
<!-- ##### SECTION Long_Description ##### -->
<para>
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### MACRO GST_MAKE_FOURCC ##### -->
<para>
will transform four characters into a host-endiannness guint32 fourcc:
<informalexample>
<programlisting>
guint32 fourcc = GST_MAKE_FOURCC ('M','J','P','G');
</programlisting>
</informalexample>
</para>
@a: the first component
@b: the second component
@c: the third component
@d: the fourth component
<!-- ##### MACRO GST_STR_FOURCC ##### -->
<para>
Creates a fourcc from an input string. The input string should consisnt
of at least four characters (this is not checked for!).
<informalexample>
<programlisting>
guint32 fourcc = GST_STR_FOURCC("MJPG");
</programlisting>
</informalexample>
</para>
@f: a string with four characters
<!-- ##### MACRO GST_FOURCC_FORMAT ##### -->
<para>
Can be used to properly output a fourcc (a guint32) value in a
printf()-style text message.
<informalexample>
<programlisting>
printf ("fourcc: %" GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS (fcc));
</programlisting>
</informalexample>
</para>
<!-- ##### MACRO GST_FOURCC_ARGS ##### -->
<para>
Can be used to properly output a fourcc (a guint32) value in a
printf()-style text message.
<informalexample>
<programlisting>
printf ("fourcc: %" GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS (fcc));
</programlisting>
</informalexample>
</para>
@fourcc: the fourcc value to print
<!-- ##### MACRO GST_VALUE_HOLDS_FOURCC ##### -->
<para>
Checks if the give GValue contains a FOURCC value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_HOLDS_INT_RANGE ##### -->
<para>
Checks if the give GValue contains a INT_RANGE value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_HOLDS_DOUBLE_RANGE ##### -->
<para>
Checks if the give GValue contains a DOUBLE_RANGE value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_HOLDS_LIST ##### -->
<para>
Checks if the give GValue contains a LIST value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_HOLDS_CAPS ##### -->
<para>
Checks if the give GValue contains a CAPS value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_HOLDS_FRACTION ##### -->
<para>
Checks if the give GValue contains a FRACTION value.
</para>
@x: the #GValue to check
<!-- ##### MACRO GST_VALUE_LESS_THAN ##### -->
<para>
Indicates that the first value provided to a comparison function
(gst_value_compare()) is lesser than the second one.
</para>
<!-- ##### MACRO GST_VALUE_EQUAL ##### -->
<para>
Indicates that the first value provided to a comparison function
(gst_value_compare()) is equal to the second one.
</para>
<!-- ##### MACRO GST_VALUE_GREATER_THAN ##### -->
<para>
Indicates that the first value provided to a comparison function
(gst_value_compare()) is greater than the second one.
</para>
<!-- ##### MACRO GST_VALUE_UNORDERED ##### -->
<para>
Indicates that the comparison function (gst_value_compare()) can not
determine a order for the two provided values.
</para>
<!-- ##### USER_FUNCTION GstValueCompareFunc ##### -->
<para>
</para>
@value1:
@value2:
@Returns: one of GST_VALUE_LESS_THAN, GST_VALUE_EQUAL,
GST_VALUE_GREATER_THAN or GST_VALUE_UNORDERED
<!-- ##### USER_FUNCTION GstValueSerializeFunc ##### -->
<para>
</para>
@value1:
@Returns:
<!-- ##### USER_FUNCTION GstValueDeserializeFunc ##### -->
<para>
</para>
@dest:
@s:
@Returns:
<!-- ##### USER_FUNCTION GstValueUnionFunc ##### -->
<para>
</para>
@dest:
@value1:
@value2:
@Returns:
<!-- ##### USER_FUNCTION GstValueIntersectFunc ##### -->
<para>
</para>
@dest:
@value1:
@value2:
@Returns:
<!-- ##### USER_FUNCTION GstValueSubtractFunc ##### -->
<para>
</para>
@dest:
@minuend:
@subtrahend:
@Returns:
<!-- ##### STRUCT GstValueTable ##### -->
<para>
</para>
@type:
@compare:
@serialize:
@deserialize:
<!-- ##### FUNCTION gst_value_is_fixed ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_register ##### -->
<para>
</para>
@table:
<!-- ##### FUNCTION gst_value_init_and_copy ##### -->
<para>
</para>
@dest:
@src:
<!-- ##### FUNCTION gst_value_serialize ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_deserialize ##### -->
<para>
</para>
@dest:
@src:
@Returns:
<!-- ##### FUNCTION gst_value_list_append_value ##### -->
<para>
</para>
@value:
@append_value:
<!-- ##### FUNCTION gst_value_list_prepend_value ##### -->
<para>
</para>
@value:
@prepend_value:
<!-- ##### FUNCTION gst_value_list_concat ##### -->
<para>
</para>
@dest:
@value1:
@value2:
<!-- ##### FUNCTION gst_value_list_get_size ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_list_get_value ##### -->
<para>
</para>
@value:
@index:
@Returns:
<!-- ##### FUNCTION gst_value_set_fourcc ##### -->
<para>
</para>
@value:
@fourcc:
<!-- ##### FUNCTION gst_value_get_fourcc ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_set_int_range ##### -->
<para>
</para>
@value:
@start:
@end:
<!-- ##### FUNCTION gst_value_get_int_range_min ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_get_int_range_max ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_set_double_range ##### -->
<para>
</para>
@value:
@start:
@end:
<!-- ##### FUNCTION gst_value_get_double_range_min ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_get_double_range_max ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_get_caps ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_set_caps ##### -->
<para>
</para>
@value:
@caps:
<!-- # Unused Parameters # -->
@calue:
<!-- ##### FUNCTION gst_value_get_fraction_numerator ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_get_fraction_denominator ##### -->
<para>
</para>
@value:
@Returns:
<!-- ##### FUNCTION gst_value_set_fraction ##### -->
<para>
</para>
@value:
@numerator:
@denominator:
<!-- ##### FUNCTION gst_value_fraction_multiply ##### -->
<para>
</para>
@product:
@factor1:
@factor2:
@Returns:
<!-- ##### FUNCTION gst_value_compare ##### -->
<para>
</para>
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_can_compare ##### -->
<para>
</para>
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_union ##### -->
<para>
</para>
@dest:
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_can_union ##### -->
<para>
</para>
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_register_union_func ##### -->
<para>
</para>
@type1:
@type2:
@func:
<!-- ##### FUNCTION gst_value_subtract ##### -->
<para>
</para>
@dest:
@minuend:
@subtrahend:
@Returns:
<!-- ##### FUNCTION gst_value_can_subtract ##### -->
<para>
</para>
@minuend:
@subtrahend:
@Returns:
<!-- ##### FUNCTION gst_value_register_subtract_func ##### -->
<para>
</para>
@minuend_type:
@subtrahend_type:
@func:
<!-- ##### FUNCTION gst_value_intersect ##### -->
<para>
</para>
@dest:
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_can_intersect ##### -->
<para>
</para>
@value1:
@value2:
@Returns:
<!-- ##### FUNCTION gst_value_register_intersect_func ##### -->
<para>
</para>
@type1:
@type2:
@func: