31 #include "../../include/effects/Brightness.h" 38 init_effect_details();
45 init_effect_details();
49 void Brightness::init_effect_details()
57 info.
description =
"Adjust the brightness and contrast of the frame's image.";
67 std::shared_ptr<QImage> frame_image = frame->GetImage();
74 unsigned char *pixels = (
unsigned char *) frame_image->bits();
75 for (
int pixel = 0, byte_index=0; pixel < frame_image->width() * frame_image->height(); pixel++, byte_index+=4)
78 int R = pixels[byte_index];
79 int G = pixels[byte_index + 1];
80 int B = pixels[byte_index + 2];
81 int A = pixels[byte_index + 3];
84 float factor = (259 * (contrast_value + 255)) / (255 * (259 - contrast_value));
85 R =
constrain((factor * (R - 128)) + 128);
86 G =
constrain((factor * (G - 128)) + 128);
87 B =
constrain((factor * (B - 128)) + 128);
90 R += (255 * brightness_value);
91 G += (255 * brightness_value);
92 B += (255 * brightness_value);
100 pixels[byte_index] = R;
101 pixels[byte_index + 1] = G;
102 pixels[byte_index + 2] = B;
103 pixels[byte_index + 3] = A;
135 Json::CharReaderBuilder rbuilder;
136 Json::CharReader* reader(rbuilder.newCharReader());
139 bool success = reader->parse( value.c_str(),
140 value.c_str() + value.size(), &root, &errors );
145 throw InvalidJSON(
"JSON could not be parsed (or is invalid)");
152 catch (
const std::exception& e)
155 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
166 if (!root[
"brightness"].isNull())
168 if (!root[
"contrast"].isNull())
177 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
178 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
180 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
181 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
182 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
true, requested_frame);
189 return root.toStyledString();
Brightness()
Blank constructor, useful when using Json to load the effect properties.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Keyframe contrast
Contrast keyframe.
float End()
Get end position (in seconds) of clip (trim end of video)
int Layer()
Get layer of clip on timeline (lower number is covered by higher numbers)
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
bool has_audio
Determines if this effect manipulates the audio of a frame.
std::string Id()
Get basic properties.
float Position()
Get position on timeline (in seconds)
std::string PropertiesJSON(int64_t requested_frame)
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
std::string class_name
The class name of the effect.
std::string name
The name of the effect.
Keyframe brightness
Brightness keyframe. A constant value here will prevent animation.
void SetJson(std::string value)
Load JSON string into this object.
Json::Value add_property_json(std::string name, float value, std::string type, std::string memo, Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame)
Generate JSON for a property.
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
Generate Json::JsonValue for this object.
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.
Exception for invalid JSON.
double GetValue(int64_t index) const
Get the value at a specific index.
int constrain(int color_value)
Constrain a color value from 0 to 255.
std::string Json()
Get and Set JSON methods.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time...
float Duration()
Get the length of this clip (in seconds)
Json::Value JsonValue()
Generate Json::JsonValue for this object.
float Start()
Get start position (in seconds) of clip (trim start of video)
EffectInfoStruct info
Information about the current effect.