31 #include "../../include/effects/ChromaKey.h" 41 init_effect_details();
50 init_effect_details();
54 void ChromaKey::init_effect_details()
61 info.
name =
"Chroma Key (Greenscreen)";
62 info.
description =
"Replaces the color (or chroma) of the frame with transparency (i.e. keys out the color).";
72 int threshold = fuzz.
GetInt(frame_number);
73 long mask_R = color.
red.
GetInt(frame_number);
78 std::shared_ptr<QImage> image = frame->GetImage();
79 unsigned char *pixels = (
unsigned char *) image->bits();
82 for (
int pixel = 0, byte_index=0; pixel < image->width() * image->height(); pixel++, byte_index+=4)
85 unsigned char R = pixels[byte_index];
86 unsigned char G = pixels[byte_index + 1];
87 unsigned char B = pixels[byte_index + 2];
88 unsigned char A = pixels[byte_index + 3];
94 if (distance <= threshold)
96 pixels[byte_index + 3] = 0;
128 Json::CharReaderBuilder rbuilder;
129 Json::CharReader* reader(rbuilder.newCharReader());
132 bool success = reader->parse( value.c_str(),
133 value.c_str() + value.size(), &root, &errors );
138 throw InvalidJSON(
"JSON could not be parsed (or is invalid)");
145 catch (
const std::exception& e)
148 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
159 if (!root[
"color"].isNull())
161 if (!root[
"fuzz"].isNull())
170 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
171 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
173 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
174 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
175 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
true, requested_frame);
178 root[
"color"] =
add_property_json(
"Key Color", 0.0,
"color",
"", NULL, 0, 255,
false, requested_frame);
182 root[
"fuzz"] =
add_property_json(
"Fuzz", fuzz.
GetValue(requested_frame),
"float",
"", &fuzz, 0, 25,
false, requested_frame);
185 return root.toStyledString();
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
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...
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.
int GetInt(int64_t index) const
Get the rounded INT value at a specific index.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
openshot::Keyframe blue
Curve representing the red value (0 - 255)
bool has_audio
Determines if this effect manipulates the audio of a frame.
static long GetDistance(long R1, long G1, long B1, long R2, long G2, long B2)
Get the distance between 2 RGB pairs. (0=identical colors, 10=very close colors, 760=very different c...
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
openshot::Keyframe green
Curve representing the green value (0 - 255)
ChromaKey()
Blank constructor, useful when using Json to load the effect properties.
void SetJson(std::string value)
Load JSON string into this object.
std::string Id()
Get basic properties.
float Position()
Get position on timeline (in seconds)
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.
This class represents a color (used on the timeline and clips)
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::string Json()
Get and Set JSON methods.
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.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
openshot::Keyframe red
Curve representing the red value (0 - 255)
std::string PropertiesJSON(int64_t requested_frame)
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)
float Start()
Get start position (in seconds) of clip (trim start of video)
EffectInfoStruct info
Information about the current effect.