OpenShot Library | libopenshot  0.1.9
Public Member Functions | Public Attributes | List of all members
openshot::Brightness Class Reference

This class adjusts the brightness and contrast of an image, and can be animated with openshot::Keyframe curves over time. More...

#include <Brightness.h>

Inheritance diagram for openshot::Brightness:
openshot::EffectBase openshot::ClipBase

Public Member Functions

 Brightness ()
 Blank constructor, useful when using Json to load the effect properties. More...
 
 Brightness (Keyframe new_brightness, Keyframe new_contrast)
 Default constructor, which takes 2 curves. The curves adjust the brightness and. More...
 
std::shared_ptr< FrameGetFrame (std::shared_ptr< Frame > frame, int64_t frame_number)
 This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame object. More...
 
string Json ()
 Get and Set JSON methods. More...
 
Json::Value JsonValue ()
 Generate Json::JsonValue for this object. More...
 
string PropertiesJSON (int64_t requested_frame)
 
void SetJson (string value)
 Load JSON string into this object. More...
 
void SetJsonValue (Json::Value root)
 Load Json::JsonValue into this object. More...
 
- Public Member Functions inherited from openshot::EffectBase
void DisplayInfo ()
 Display effect information in the standard output stream (stdout) More...
 
void InitEffectInfo ()
 
Json::Value JsonInfo ()
 Generate JSON object of meta data / info. More...
 
int Order ()
 Get the order that this effect should be executed. More...
 
void Order (int new_order)
 Set the order that this effect should be executed. More...
 
- Public Member Functions inherited from openshot::ClipBase
 ClipBase ()
 Constructor for the base clip. More...
 
float Duration ()
 Get the length of this clip (in seconds) More...
 
float End ()
 Get end position (in seconds) of clip (trim end of video) More...
 
void End (float value)
 Set end position (in seconds) of clip (trim end of video) More...
 
string Id ()
 Get basic properties. More...
 
void Id (string value)
 Set basic properties. More...
 
int Layer ()
 Get layer of clip on timeline (lower number is covered by higher numbers) More...
 
void Layer (int value)
 Set layer of clip on timeline (lower number is covered by higher numbers) More...
 
bool operator< (ClipBase &a)
 
bool operator<= (ClipBase &a)
 
bool operator> (ClipBase &a)
 
bool operator>= (ClipBase &a)
 
float Position ()
 Get position on timeline (in seconds) More...
 
void Position (float value)
 

Set the Id of this clip object

More...
 
void SetMaxSize (int width, int height)
 Set Max Image Size (used for performance optimization) More...
 
float Start ()
 Get start position (in seconds) of clip (trim start of video) More...
 
void Start (float value)
 Set start position (in seconds) of clip (trim start of video) More...
 

Public Attributes

Keyframe brightness
 Brightness keyframe. A constant value here will prevent animation. More...
 
Keyframe contrast
 Contrast keyframe. More...
 
- Public Attributes inherited from openshot::EffectBase
EffectInfoStruct info
 Information about the current effect. More...
 

Additional Inherited Members

- Protected Member Functions inherited from openshot::ClipBase
Json::Value add_property_choice_json (string name, int value, int selected_value)
 Generate JSON choice for a property (dropdown properties) More...
 
Json::Value add_property_json (string name, float value, string type, string memo, Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame)
 Generate JSON for a property. More...
 
- Protected Attributes inherited from openshot::ClipBase
float end
 The position in seconds to end playing (used to trim the ending of a clip) More...
 
string id
 ID Property for all derived Clip and Effect classes. More...
 
int layer
 The layer this clip is on. Lower clips are covered up by higher clips. More...
 
int max_height
 The maximium image height needed by this clip (used for optimizations) More...
 
int max_width
 The maximum image width needed by this clip (used for optimizations) More...
 
float position
 The position on the timeline where this clip should start playing. More...
 
string previous_properties
 This string contains the previous JSON properties. More...
 
float start
 The position in seconds to start playing (used to trim the beginning of a clip) More...
 

Detailed Description

This class adjusts the brightness and contrast of an image, and can be animated with openshot::Keyframe curves over time.

Adjusting the brightness and contrast over time can create many different powerful effects.

Definition at line 59 of file Brightness.h.

Constructor & Destructor Documentation

◆ Brightness() [1/2]

Brightness::Brightness ( )

Blank constructor, useful when using Json to load the effect properties.

Definition at line 33 of file Brightness.cpp.

◆ Brightness() [2/2]

Brightness::Brightness ( Keyframe  new_brightness,
Keyframe  new_contrast 
)

Default constructor, which takes 2 curves. The curves adjust the brightness and.

Parameters
new_brightnessThe curve to adjust the brightness (between 100 and -100)
new_contrastThe curve to adjust the contrast (3 is typical, 20 is a lot, 0 is invalid)

Definition at line 39 of file Brightness.cpp.

Member Function Documentation

◆ GetFrame()

std::shared_ptr< Frame > Brightness::GetFrame ( std::shared_ptr< Frame frame,
int64_t  frame_number 
)
virtual

This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame object.

The frame object is passed into this method, and a frame_number is passed in which tells the effect which settings to use from it's keyframes (starting at 1).

Returns
The modified openshot::Frame object
Parameters
frameThe frame object that needs the effect applied to it
frame_numberThe frame number (starting at 1) of the effect on the timeline.

Implements openshot::EffectBase.

Definition at line 74 of file Brightness.cpp.

◆ Json()

string Brightness::Json ( )
virtual

Get and Set JSON methods.

Generate JSON string of this object

Implements openshot::EffectBase.

Definition at line 121 of file Brightness.cpp.

◆ JsonValue()

Json::Value Brightness::JsonValue ( )
virtual

Generate Json::JsonValue for this object.

Implements openshot::EffectBase.

Definition at line 128 of file Brightness.cpp.

◆ PropertiesJSON()

string Brightness::PropertiesJSON ( int64_t  requested_frame)
virtual

Get all properties for a specific frame (perfect for a UI to display the current state of all properties at any time)

Implements openshot::ClipBase.

Definition at line 177 of file Brightness.cpp.

◆ SetJson()

void Brightness::SetJson ( string  value)
virtual

Load JSON string into this object.

Implements openshot::EffectBase.

Definition at line 141 of file Brightness.cpp.

◆ SetJsonValue()

void Brightness::SetJsonValue ( Json::Value  root)
virtual

Load Json::JsonValue into this object.

Implements openshot::EffectBase.

Definition at line 164 of file Brightness.cpp.

Member Data Documentation

◆ brightness

Keyframe openshot::Brightness::brightness

Brightness keyframe. A constant value here will prevent animation.

Definition at line 69 of file Brightness.h.

◆ contrast

Keyframe openshot::Brightness::contrast

Contrast keyframe.

Definition at line 70 of file Brightness.h.


The documentation for this class was generated from the following files: