OpenShot Library | libopenshot
0.2.2
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28 #include "../../include/effects/Saturation.h"
35 init_effect_details();
42 init_effect_details();
46 void Saturation::init_effect_details()
64 std::shared_ptr<QImage> frame_image = frame->GetImage();
78 unsigned char *pixels = (
unsigned char *) frame_image->bits();
79 for (
int pixel = 0, byte_index=0; pixel < frame_image->width() * frame_image->height(); pixel++, byte_index+=4)
82 int R = pixels[byte_index];
83 int G = pixels[byte_index + 1];
84 int B = pixels[byte_index + 2];
85 int A = pixels[byte_index + 3];
88 double p = sqrt( (R * R * pR) +
93 R = p + (R - p) * saturation_value;
94 G = p + (G - p) * saturation_value;
95 B = p + (B - p) * saturation_value;
103 pixels[byte_index] = R;
104 pixels[byte_index + 1] = G;
105 pixels[byte_index + 2] = B;
106 pixels[byte_index + 3] = A;
138 bool success = reader.parse( value, root );
141 throw InvalidJSON(
"JSON could not be parsed (or is invalid)",
"");
151 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)",
"");
162 if (!root[
"saturation"].isNull())
171 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
172 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
174 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
175 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
176 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
true, requested_frame);
182 return root.toStyledString();
EffectInfoStruct info
Information about the current effect.
This namespace is the default namespace for all code in the openshot library.
float Start()
Get start position (in seconds) of clip (trim start of video)
string class_name
The class name of the effect.
string Id()
Get basic properties.
string PropertiesJSON(int64_t requested_frame)
Json::Value JsonValue()
Generate Json::JsonValue for this object.
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
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.
double GetValue(int64_t index)
Get the value at a specific index.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Exception for invalid JSON.
float Duration()
Get the length of this clip (in seconds)
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
bool has_audio
Determines if this effect manipulates the audio of a frame.
string description
The description of this effect and what it does.
void SetJson(string value)
Load JSON string into this object.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
string name
The name of the effect.
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
bool has_video
Determines if this effect manipulates the image of a frame.
float End()
Get end position (in seconds) of clip (trim end of video)
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...
int Layer()
Get layer of clip on timeline (lower number is covered by higher numbers)
int constrain(int color_value)
Constrain a color value from 0 to 255.
string Json()
Get and Set JSON methods.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Saturation()
Blank constructor, useful when using Json to load the effect properties.
float Position()
Get position on timeline (in seconds)
Keyframe saturation
The color saturation: 0.0 = black and white, 1.0 = normal, 2.0 = double saturation.