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(out 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 gobject.Value 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 gstreamer.Caps 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(out 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(out 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 gobject.Value 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 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(out 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(out Value dest, Value value1, Value value2)

Creates a GValue corresponding to the union of value1 and value2.

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