ValueGst

struct ValueGst {

}

Members

Static functions

canCompare bool canCompare(Value value1, Value value2): Determines if @value1 and @value2 can be compared.
canIntersect bool canIntersect(Value value1, Value value2): Determines if intersecting two values will produce a valid result. Two values will produce a valid intersection if they have the same type.
canSubtract bool canSubtract(Value minuend, Value subtrahend): Checks if it's possible to subtract @subtrahend from @minuend.
canUnion bool canUnion(Value value1, Value value2): Determines if @value1 and @value2 can be non-trivially unioned. Any two values can be trivially unioned by adding both of them to a GstValueList. However, certain types have the possibility to be unioned in a simpler way. For example, an integer range and an integer can be unioned if the integer is a subset of the integer range. If there is the possibility that two values can be unioned, this function returns %TRUE.
compare int compare(Value value1, Value value2): Compares @value1 and @value2. If @value1 and @value2 cannot be compared, the function returns GST_VALUE_UNORDERED. Otherwise, if @value1 is greater than @value2, GST_VALUE_GREATER_THAN is returned. If @value1 is less than @value2, GST_VALUE_LESS_THAN is returned. If the values are equal, GST_VALUE_EQUAL is returned.
deserialize bool deserialize(Value dest, string src): Tries to deserialize a string into the type specified by the given GValue. If the operation succeeds, %TRUE is returned, %FALSE otherwise.
fixate bool fixate(Value dest, Value src): Fixate @src into a new value @dest. For ranges, the first element is taken. For lists and arrays, the first item is fixated and returned. If @src is already fixed, this function returns %FALSE.
fractionMultiply bool fractionMultiply(Value product, Value factor1, Value factor2): Multiplies the two #GValue items containing a #GST_TYPE_FRACTION and sets @product to the product of the two fractions.
fractionSubtract bool fractionSubtract(Value dest, Value minuend, Value subtrahend): Subtracts the @subtrahend from the @minuend and sets @dest to the result.
getBitmask ulong getBitmask(Value value): Gets the bitmask specified by @value.
getCaps Caps getCaps(Value value): Gets the contents of @value. The reference count of the returned #GstCaps will not be modified, therefore the caller must take one before getting rid of the @value.
getCapsFeatures CapsFeatures getCapsFeatures(Value value): Gets the contents of @value.
getDoubleRangeMax double getDoubleRangeMax(Value value): Gets the maximum of the range specified by @value.
getDoubleRangeMin double getDoubleRangeMin(Value value): Gets the minimum of the range specified by @value.
getFlagsetFlags uint getFlagsetFlags(Value value): Retrieve the flags field of a GstFlagSet @value.
getFlagsetMask uint getFlagsetMask(Value value): Retrieve the mask field of a GstFlagSet @value.
getFractionDenominator int getFractionDenominator(Value value): Gets the denominator of the fraction specified by @value.
getFractionNumerator int getFractionNumerator(Value value): Gets the numerator of the fraction specified by @value.
getFractionRangeMax Value getFractionRangeMax(Value value): Gets the maximum of the range specified by @value.
getFractionRangeMin Value getFractionRangeMin(Value value): Gets the minimum of the range specified by @value.
getInt64RangeMax long getInt64RangeMax(Value value): Gets the maximum of the range specified by @value.
getInt64RangeMin long getInt64RangeMin(Value value): Gets the minimum of the range specified by @value.
getInt64RangeStep long getInt64RangeStep(Value value): Gets the step of the range specified by @value.
getIntRangeMax int getIntRangeMax(Value value): Gets the maximum of the range specified by @value.
getIntRangeMin int getIntRangeMin(Value value): Gets the minimum of the range specified by @value.
getIntRangeStep int getIntRangeStep(Value value): Gets the step of the range specified by @value.
getStructure Structure getStructure(Value value): Gets the contents of @value.
initAndCopy void initAndCopy(Value dest, Value src): Initialises the target value to be of the same type as source and then copies the contents from source to target.
intersect bool intersect(Value dest, Value value1, Value value2): Calculates the intersection of two values. If the values have a non-empty intersection, the value representing the intersection is placed in @dest, unless %NULL. If the intersection is non-empty, @dest is not modified.
isFixed bool isFixed(Value value): Tests if the given GValue, if available in a GstStructure (or any other container) contains a "fixed" (which means: one value) or an "unfixed" (which means: multiple possible values, such as data lists or data ranges) value.
isSubset bool isSubset(Value value1, Value value2): Check that @value1 is a subset of @value2.
register void register(GstValueTable* table): Registers functions to perform calculations on #GValue items of a given type. Each type can only be added once.
serialize string serialize(Value value): tries to transform the given @value into a string representation that allows getting back this string later on using gst_value_deserialize().
setBitmask void setBitmask(Value value, ulong bitmask): Sets @value to the bitmask specified by @bitmask.
setCaps void setCaps(Value value, Caps caps): Sets the contents of @value to @caps. A reference to the provided @caps will be taken by the @value.
setCapsFeatures void setCapsFeatures(Value value, CapsFeatures features): Sets the contents of @value to @features.
setDoubleRange void setDoubleRange(Value value, double start, double end): Sets @value to the range specified by @start and @end.
setFlagset void setFlagset(Value value, uint flags, uint mask): Sets @value to the flags and mask values provided in @flags and @mask. The @flags value indicates the values of flags, the @mask represents which bits in the flag value have been set, and which are "don't care"
setFraction void setFraction(Value value, int numerator, int denominator): Sets @value to the fraction specified by @numerator over @denominator. The fraction gets reduced to the smallest numerator and denominator, and if necessary the sign is moved to the numerator.
setFractionRange void setFractionRange(Value value, Value start, Value end): Sets @value to the range specified by @start and @end.
setFractionRangeFull void setFractionRangeFull(Value value, int numeratorStart, int denominatorStart, int numeratorEnd, int denominatorEnd): Sets @value to the range specified by @numerator_start/@denominator_start and @numerator_end/@denominator_end.
setInt64Range void setInt64Range(Value value, long start, long end): Sets @value to the range specified by @start and @end.
setInt64RangeStep void setInt64RangeStep(Value value, long start, long end, long step): Sets @value to the range specified by @start, @end and @step.
setIntRange void setIntRange(Value value, int start, int end): Sets @value to the range specified by @start and @end.
setIntRangeStep void setIntRangeStep(Value value, int start, int end, int step): Sets @value to the range specified by @start, @end and @step.
setStructure void setStructure(Value value, Structure structure): Sets the contents of @value to @structure.
subtract bool subtract(Value dest, Value minuend, Value subtrahend): Subtracts @subtrahend from @minuend and stores the result in @dest. Note that this means subtraction as in sets, not as in mathematics.
unio bool unio(Value dest, Value value1, Value value2): Creates a GValue corresponding to the union of @value1 and @value2.

ValueGst

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