OpenShot Library | libopenshot
0.2.5
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31 #include "../../include/effects/Hue.h"
38 init_effect_details();
45 init_effect_details();
49 void Hue::init_effect_details()
64 std::shared_ptr<Frame>
Hue::GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number)
67 std::shared_ptr<QImage> frame_image = frame->
GetImage();
69 int pixel_count = frame_image->width() * frame_image->height();
72 double degrees = 360.0 *
hue.
GetValue(frame_number);
73 float cosA = cos(degrees*3.14159265f/180);
74 float sinA = sin(degrees*3.14159265f/180);
78 cosA + (1.0f - cosA) / 3.0f,
79 1.0f/3.0f * (1.0f - cosA) - sqrtf(1.0f/3.0f) * sinA,
80 1.0f/3.0f * (1.0f - cosA) + sqrtf(1.0f/3.0f) * sinA
84 unsigned char *pixels = (
unsigned char *) frame_image->bits();
86 #pragma omp parallel for shared (pixels)
87 for (
int pixel = 0; pixel < pixel_count; ++pixel)
90 int R = pixels[pixel * 4];
91 int G = pixels[pixel * 4 + 1];
92 int B = pixels[pixel * 4 + 2];
95 pixels[pixel * 4] =
constrain(R * matrix[0] + G * matrix[1] + B * matrix[2]);
96 pixels[pixel * 4 + 1] =
constrain(R * matrix[2] + G * matrix[0] + B * matrix[1]);
97 pixels[pixel * 4 + 2] =
constrain(R * matrix[1] + G * matrix[2] + B * matrix[0]);
133 catch (
const std::exception& e)
136 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
147 if (!root[
"hue"].isNull())
156 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
157 root[
"position"] =
add_property_json(
"Position", Position(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
158 root[
"layer"] =
add_property_json(
"Track", Layer(),
"int",
"", NULL, 0, 20,
false, requested_frame);
159 root[
"start"] =
add_property_json(
"Start", Start(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
160 root[
"end"] =
add_property_json(
"End", End(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
161 root[
"duration"] =
add_property_json(
"Duration", Duration(),
"float",
"", NULL, 0, 1000 * 60 * 30,
true, requested_frame);
167 return root.toStyledString();
Json::Value add_property_json(std::string name, float value, std::string type, std::string memo, const Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame) const
Generate JSON for a property.
const Json::Value stringToJson(const std::string value)
EffectInfoStruct info
Information about the current effect.
std::shared_ptr< Frame > GetFrame(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...
This namespace is the default namespace for all code in the openshot library.
Json::Value JsonValue() const override
Generate Json::Value for this object.
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
virtual void SetJsonValue(const Json::Value root)=0
Load Json::Value into this object.
virtual Json::Value JsonValue() const =0
Generate Json::Value for this object.
Json::Value JsonValue() const
Generate Json::Value for this object.
std::string PropertiesJSON(int64_t requested_frame) const override
Keyframe hue
Shift the hue coordinates (left or right)
void SetJson(const std::string value)
Load JSON string into this object.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Exception for invalid JSON.
std::string Json() const override
Get and Set JSON methods.
bool has_audio
Determines if this effect manipulates the audio of a frame.
Hue()
Blank constructor, useful when using Json to load the effect properties.
This class shifts the hue of an image, and can be animated with openshot::Keyframe curves over time.
std::string class_name
The class name of the effect.
std::string description
The description of this effect and what it does.
bool has_video
Determines if this effect manipulates the image of a frame.
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
void Id(std::string value)
Set basic properties.
std::shared_ptr< QImage > GetImage()
Get pointer to Qt QImage image object.
int constrain(int color_value)
Constrain a color value from 0 to 255.
std::string name
The name of the effect.
double GetValue(int64_t index) const
Get the value at a specific index.