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OpenShot Library | libopenshot
0.4.0
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A Keyframe is a collection of Point instances, which is used to vary a number or property over time. More...
#include <KeyFrame.h>
Public Member Functions | |
| void | AddPoint (double x, double y, InterpolationType interpolate=BEZIER) |
| Add a new point on the key-frame, with optional interpolation type. More... | |
| void | AddPoint (Point p) |
| Add a new point on the key-frame. Each point has a primary coordinate, a left handle, and a right handle. More... | |
| bool | Contains (Point p) const |
| Does this keyframe contain a specific point. More... | |
| int64_t | FindIndex (Point p) const |
| Get the index of a point by matching a coordinate. More... | |
| void | FlipPoints () |
| Flip all the points in this openshot::Keyframe (useful for reversing an effect or transition, etc...) More... | |
| Point | GetClosestPoint (Point p) const |
| Get current point (or closest point to the right) from the X coordinate (i.e. the frame number) More... | |
| Point | GetClosestPoint (Point p, bool useLeft) const |
| int64_t | GetCount () const |
| Get the number of points (i.e. # of points) More... | |
| double | GetDelta (int64_t index) const |
| Get the change in Y value (from the previous Y value) More... | |
| int | GetInt (int64_t index) const |
| Get the rounded INT value at a specific index. More... | |
| int64_t | GetLength () const |
| int64_t | GetLong (int64_t index) const |
| Get the rounded LONG value at a specific index. More... | |
| Point | GetMaxPoint () const |
| Get max point (by Y coordinate) More... | |
| const Point & | GetPoint (int64_t index) const |
| Get a point at a specific index. More... | |
| Point | GetPreviousPoint (Point p) const |
| Get previous point (. More... | |
| double | GetValue (int64_t index) const |
| Get the value at a specific index. More... | |
| bool | IsIncreasing (int index) const |
| Get the direction of the curve at a specific index (increasing or decreasing) More... | |
| std::string | Json () const |
| Generate JSON string of this object. More... | |
| Json::Value | JsonValue () const |
| Generate Json::Value for this object. More... | |
| Keyframe ()=default | |
| Default constructor for the Keyframe class. More... | |
| Keyframe (const std::vector< openshot::Point > &points) | |
| Constructor which adds a supplied vector of Points. More... | |
| Keyframe (double value) | |
| Constructor which sets the default point & coordinate at X=1. More... | |
| void | PrintPoints (std::ostream *out=&std::cout) const |
| Print a list of points. More... | |
| void | PrintValues (std::ostream *out=&std::cout) const |
| Print just the Y value of the point's primary coordinate. More... | |
| void | RemovePoint (int64_t index) |
| Remove a point by index. More... | |
| void | RemovePoint (Point p) |
| Remove a point by matching a coordinate. More... | |
| void | ScalePoints (double scale) |
| void | SetJson (const std::string value) |
| Load JSON string into this object. More... | |
| void | SetJsonValue (const Json::Value root) |
| Load Json::Value into this object. More... | |
| void | UpdatePoint (int64_t index, Point p) |
| Replace an existing point with a new point. More... | |
| ~Keyframe () | |
| Destructor. More... | |
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Keyframes are used to animate and interpolate values of properties over time. For example, a single property can use a Keyframe instead of a constant value. Assume you want to slide an image (from left to right) over a video. You can create a Keyframe which will adjust the X value of the image over 100 frames (or however many frames the animation needs to last) from the value of 0 to 640.
Please see the following Example Code:
Definition at line 53 of file KeyFrame.h.
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default |
Default constructor for the Keyframe class.
| Keyframe::Keyframe | ( | double | value | ) |
Constructor which sets the default point & coordinate at X=1.
Definition at line 115 of file KeyFrame.cpp.
| Keyframe::Keyframe | ( | const std::vector< openshot::Point > & | points | ) |
Constructor which adds a supplied vector of Points.
Definition at line 121 of file KeyFrame.cpp.
| Keyframe::~Keyframe | ( | ) |
Destructor.
Definition at line 124 of file KeyFrame.cpp.
| void Keyframe::AddPoint | ( | double | x, |
| double | y, | ||
| InterpolationType | interpolate = BEZIER |
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| ) |
Add a new point on the key-frame, with optional interpolation type.
Definition at line 156 of file KeyFrame.cpp.
| void Keyframe::AddPoint | ( | Point | p | ) |
Add a new point on the key-frame. Each point has a primary coordinate, a left handle, and a right handle.
Definition at line 131 of file KeyFrame.cpp.
Referenced by AddPoint(), SetJsonValue(), and UpdatePoint().
| bool Keyframe::Contains | ( | Point | p | ) | const |
Does this keyframe contain a specific point.
Definition at line 184 of file KeyFrame.cpp.
Referenced by openshot::ClipBase::add_property_json(), openshot::TrackedObjectBBox::add_property_json(), and PrintValues().
| int64_t Keyframe::FindIndex | ( | Point | p | ) | const |
Get the index of a point by matching a coordinate.
Definition at line 166 of file KeyFrame.cpp.
Referenced by GetPreviousPoint().
| void Keyframe::FlipPoints | ( | ) |
Flip all the points in this openshot::Keyframe (useful for reversing an effect or transition, etc...)
Definition at line 530 of file KeyFrame.cpp.
Get current point (or closest point to the right) from the X coordinate (i.e. the frame number)
Definition at line 221 of file KeyFrame.cpp.
Referenced by openshot::ClipBase::add_property_json(), and openshot::TrackedObjectBBox::add_property_json().
Get current point (or closest point) from the X coordinate (i.e. the frame number) Either use the closest left point, or right point
Definition at line 191 of file KeyFrame.cpp.
| int64_t Keyframe::GetCount | ( | ) | const |
Get the number of points (i.e. # of points)
Definition at line 424 of file KeyFrame.cpp.
Referenced by openshot::ClipBase::add_property_json(), openshot::TrackedObjectBBox::add_property_json(), openshot::Clip::End(), openshot::Timeline::GetFrame(), and openshot::Clip::init_reader_rotation().
| double Keyframe::GetDelta | ( | int64_t | index | ) | const |
Get the change in Y value (from the previous Y value)
Definition at line 399 of file KeyFrame.cpp.
Referenced by PrintValues().
| int Keyframe::GetInt | ( | int64_t | index | ) | const |
Get the rounded INT value at a specific index.
Definition at line 282 of file KeyFrame.cpp.
Referenced by openshot::Color::GetColorHex(), openshot::Color::GetColorRGBA(), openshot::Blur::GetFrame(), openshot::ChromaKey::GetFrame(), and openshot::LensFlare::PropertiesJSON().
| int64_t Keyframe::GetLength | ( | ) | const |
Definition at line 417 of file KeyFrame.cpp.
Referenced by openshot::Clip::End(), GetDelta(), IsIncreasing(), and PrintValues().
| int64_t Keyframe::GetLong | ( | int64_t | index | ) | const |
Get the rounded LONG value at a specific index.
Definition at line 287 of file KeyFrame.cpp.
| Point Keyframe::GetMaxPoint | ( | ) | const |
Get max point (by Y coordinate)
Definition at line 245 of file KeyFrame.cpp.
| const Point & Keyframe::GetPoint | ( | int64_t | index | ) | const |
Get a point at a specific index.
Definition at line 407 of file KeyFrame.cpp.
Get previous point (.
Definition at line 226 of file KeyFrame.cpp.
Referenced by openshot::ClipBase::add_property_json(), and openshot::TrackedObjectBBox::add_property_json().
| double Keyframe::GetValue | ( | int64_t | index | ) | const |
Get the value at a specific index.
Definition at line 258 of file KeyFrame.cpp.
Referenced by openshot::TrackedObjectBBox::GetBox(), openshot::TrackedObjectBBox::GetBoxValues(), GetDelta(), openshot::LensFlare::GetFrame(), openshot::Noise::GetFrame(), openshot::Distortion::GetFrame(), openshot::Delay::GetFrame(), openshot::Echo::GetFrame(), openshot::Sharpen::GetFrame(), openshot::Hue::GetFrame(), openshot::Brightness::GetFrame(), openshot::Shift::GetFrame(), openshot::Compressor::GetFrame(), openshot::Expander::GetFrame(), openshot::Bars::GetFrame(), openshot::ColorMap::GetFrame(), openshot::Wave::GetFrame(), openshot::Mask::GetFrame(), openshot::Outline::GetFrame(), openshot::Blur::GetFrame(), openshot::Pixelate::GetFrame(), openshot::Saturation::GetFrame(), openshot::ColorShift::GetFrame(), openshot::Crop::GetFrame(), openshot::Stabilizer::GetFrame(), openshot::Caption::GetFrame(), openshot::ObjectDetection::GetFrame(), openshot::Timeline::GetFrame(), GetInt(), GetLong(), IsIncreasing(), PrintValues(), openshot::LensFlare::PropertiesJSON(), openshot::Noise::PropertiesJSON(), openshot::Distortion::PropertiesJSON(), openshot::SphericalProjection::PropertiesJSON(), openshot::ParametricEQ::PropertiesJSON(), openshot::Delay::PropertiesJSON(), openshot::Echo::PropertiesJSON(), openshot::Sharpen::PropertiesJSON(), openshot::Hue::PropertiesJSON(), openshot::Brightness::PropertiesJSON(), openshot::Shift::PropertiesJSON(), openshot::Compressor::PropertiesJSON(), openshot::Expander::PropertiesJSON(), openshot::Bars::PropertiesJSON(), openshot::ColorMap::PropertiesJSON(), openshot::Wave::PropertiesJSON(), openshot::Mask::PropertiesJSON(), openshot::Outline::PropertiesJSON(), openshot::Saturation::PropertiesJSON(), openshot::Pixelate::PropertiesJSON(), openshot::Blur::PropertiesJSON(), openshot::ColorShift::PropertiesJSON(), openshot::Crop::PropertiesJSON(), openshot::ChromaKey::PropertiesJSON(), openshot::Stabilizer::PropertiesJSON(), openshot::Caption::PropertiesJSON(), openshot::ObjectDetection::PropertiesJSON(), openshot::TrackedObjectBBox::PropertiesJSON(), openshot::Clip::PropertiesJSON(), openshot::Distortion::updateFilters(), and openshot::ParametricEQ::updateFilters().
| bool Keyframe::IsIncreasing | ( | int | index | ) | const |
Get the direction of the curve at a specific index (increasing or decreasing)
Definition at line 292 of file KeyFrame.cpp.
Referenced by openshot::FrameMapper::GetFrame(), and PrintValues().
| std::string Keyframe::Json | ( | ) | const |
Generate JSON string of this object.
Definition at line 332 of file KeyFrame.cpp.
| Json::Value Keyframe::JsonValue | ( | ) | const |
Generate Json::Value for this object.
Definition at line 339 of file KeyFrame.cpp.
Referenced by Json(), openshot::LensFlare::JsonValue(), openshot::Noise::JsonValue(), openshot::Color::JsonValue(), openshot::Distortion::JsonValue(), openshot::SphericalProjection::JsonValue(), openshot::ParametricEQ::JsonValue(), openshot::Delay::JsonValue(), openshot::Echo::JsonValue(), openshot::Sharpen::JsonValue(), openshot::Hue::JsonValue(), openshot::Brightness::JsonValue(), openshot::Shift::JsonValue(), openshot::Compressor::JsonValue(), openshot::Expander::JsonValue(), openshot::Bars::JsonValue(), openshot::Wave::JsonValue(), openshot::ColorMap::JsonValue(), openshot::Mask::JsonValue(), openshot::Outline::JsonValue(), openshot::Pixelate::JsonValue(), openshot::Blur::JsonValue(), openshot::Saturation::JsonValue(), openshot::ColorShift::JsonValue(), openshot::Crop::JsonValue(), openshot::ChromaKey::JsonValue(), openshot::Stabilizer::JsonValue(), openshot::Caption::JsonValue(), openshot::ObjectDetection::JsonValue(), openshot::TrackedObjectBBox::JsonValue(), openshot::Clip::JsonValue(), and openshot::Timeline::JsonValue().
| void Keyframe::PrintPoints | ( | std::ostream * | out = &std::cout | ) | const |
Print a list of points.
Definition at line 470 of file KeyFrame.cpp.
| void Keyframe::PrintValues | ( | std::ostream * | out = &std::cout | ) | const |
Print just the Y value of the point's primary coordinate.
Definition at line 481 of file KeyFrame.cpp.
| void Keyframe::RemovePoint | ( | int64_t | index | ) |
Remove a point by index.
Definition at line 449 of file KeyFrame.cpp.
| void Keyframe::RemovePoint | ( | Point | p | ) |
Remove a point by matching a coordinate.
Definition at line 430 of file KeyFrame.cpp.
Referenced by UpdatePoint().
| void Keyframe::ScalePoints | ( | double | scale | ) |
Scale all points by a percentage (good for evenly lengthening or shortening an openshot::Keyframe) 1.0 = same size, 1.05 = 5% increase, etc...
Definition at line 516 of file KeyFrame.cpp.
| void Keyframe::SetJson | ( | const std::string | value | ) |
Load JSON string into this object.
Definition at line 355 of file KeyFrame.cpp.
| void Keyframe::SetJsonValue | ( | const Json::Value | root | ) |
Load Json::Value into this object.
Definition at line 372 of file KeyFrame.cpp.
Referenced by SetJson(), openshot::LensFlare::SetJsonValue(), openshot::Noise::SetJsonValue(), openshot::Color::SetJsonValue(), openshot::Distortion::SetJsonValue(), openshot::SphericalProjection::SetJsonValue(), openshot::ParametricEQ::SetJsonValue(), openshot::Delay::SetJsonValue(), openshot::Echo::SetJsonValue(), openshot::Sharpen::SetJsonValue(), openshot::Hue::SetJsonValue(), openshot::Brightness::SetJsonValue(), openshot::Shift::SetJsonValue(), openshot::Compressor::SetJsonValue(), openshot::Expander::SetJsonValue(), openshot::Bars::SetJsonValue(), openshot::Wave::SetJsonValue(), openshot::Outline::SetJsonValue(), openshot::Mask::SetJsonValue(), openshot::ColorMap::SetJsonValue(), openshot::Blur::SetJsonValue(), openshot::Pixelate::SetJsonValue(), openshot::Saturation::SetJsonValue(), openshot::ColorShift::SetJsonValue(), openshot::Crop::SetJsonValue(), openshot::ChromaKey::SetJsonValue(), openshot::Stabilizer::SetJsonValue(), openshot::Caption::SetJsonValue(), openshot::ObjectDetection::SetJsonValue(), openshot::TrackedObjectBBox::SetJsonValue(), and openshot::Clip::SetJsonValue().
| void Keyframe::UpdatePoint | ( | int64_t | index, |
| Point | p | ||
| ) |
Replace an existing point with a new point.
Definition at line 462 of file KeyFrame.cpp.
1.8.17