gstreamer/docs/gst/tmpl/gstvalue.sgml

<!-- ##### SECTION Title ##### -->
GstValue

<!-- ##### SECTION Short_Description ##### -->
GValue implementations specific to GStreamer

<!-- ##### SECTION Long_Description ##### -->
<para>

</para>

<!-- ##### SECTION See_Also ##### -->
<para>

</para>

<!-- ##### SECTION Stability_Level ##### -->


<!-- ##### 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: