28 #include "../../include/effects/ChromaKey.h" 38 init_effect_details();
47 init_effect_details();
51 void ChromaKey::init_effect_details()
58 info.
name =
"Chroma Key (Greenscreen)";
59 info.
description =
"Replaces the color (or chroma) of the frame with transparency (i.e. keys out the color).";
69 int threshold = fuzz.
GetInt(frame_number);
70 long mask_R = color.
red.
GetInt(frame_number);
75 tr1::shared_ptr<QImage> image = frame->GetImage();
76 unsigned char *pixels = (
unsigned char *) image->bits();
79 for (
int pixel = 0, byte_index=0; pixel < image->width() * image->height(); pixel++, byte_index+=4)
82 unsigned char R = pixels[byte_index];
83 unsigned char G = pixels[byte_index + 1];
84 unsigned char B = pixels[byte_index + 2];
85 unsigned char A = pixels[byte_index + 3];
91 if (distance <= threshold)
93 pixels[byte_index + 3] = 0;
126 bool success = reader.parse( value, root );
129 throw InvalidJSON(
"JSON could not be parsed (or is invalid)",
"");
139 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)",
"");
150 if (!root[
"color"].isNull())
152 if (!root[
"fuzz"].isNull())
160 Point requested_point(requested_frame, requested_frame);
164 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(),
false, 0, -1, -1,
CONSTANT, -1,
true);
165 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"",
false, 0, 0, 30 * 60 * 60 * 48,
CONSTANT, -1,
false);
166 root[
"layer"] =
add_property_json(
"Track",
Layer(),
"int",
"",
false, 0, 0, 20,
CONSTANT, -1,
false);
167 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"",
false, 0, 0, 30 * 60 * 60 * 48,
CONSTANT, -1,
false);
168 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"",
false, 0, 0, 30 * 60 * 60 * 48,
CONSTANT, -1,
false);
169 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"",
false, 0, 0, 30 * 60 * 60 * 48,
CONSTANT, -1,
true);
172 root[
"color"] =
add_property_json(
"Key Color", 0.0,
"color",
"", color.
red.
Contains(requested_point), color.
red.
GetCount(), 0, 255, color.
red.
GetClosestPoint(requested_point).
interpolation, color.
red.
GetClosestPoint(requested_point).
co.
X,
false);
173 root[
"color"][
"red"] =
add_property_json(
"Red", color.
red.
GetValue(requested_frame),
"float",
"", color.
red.
Contains(requested_point), color.
red.
GetCount(), 0, 255, color.
red.
GetClosestPoint(requested_point).
interpolation, color.
red.
GetClosestPoint(requested_point).
co.
X,
false);
174 root[
"color"][
"blue"] =
add_property_json(
"Blue", color.
blue.
GetValue(requested_frame),
"float",
"", color.
blue.
Contains(requested_point), color.
blue.
GetCount(), 0, 255, color.
blue.
GetClosestPoint(requested_point).
interpolation, color.
blue.
GetClosestPoint(requested_point).
co.
X,
false);
175 root[
"color"][
"green"] =
add_property_json(
"Green", color.
green.
GetValue(requested_frame),
"float",
"", color.
green.
Contains(requested_point), color.
green.
GetCount(), 0, 255, color.
green.
GetClosestPoint(requested_point).
interpolation, color.
green.
GetClosestPoint(requested_point).
co.
X,
false);
176 root[
"fuzz"] =
add_property_json(
"Fuzz", fuzz.
GetValue(requested_frame),
"float",
"", fuzz.
Contains(requested_point), fuzz.
GetCount(), 0, 25, fuzz.
GetClosestPoint(requested_point).
interpolation, fuzz.
GetClosestPoint(requested_point).
co.
X,
false);
179 return root.toStyledString();
string Json()
Get and Set JSON methods.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Keyframe green
Curve representing the green value (0 - 255)
Json::Value JsonValue()
Generate Json::JsonValue for this object.
void SetJson(string value)
Load JSON string into this object.
InterpolationType interpolation
This is the interpolation mode.
Keyframe red
Curve representing the red value (0 - 255)
bool Contains(Point p)
Does this keyframe contain a specific point.
float End()
Get end position (in seconds) of clip (trim end of video)
A Point is the basic building block of a key-frame curve.
int Layer()
Get layer of clip on timeline (lower number is covered by higher numbers)
string class_name
The class name of the effect.
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.
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...
float GetValue(long int index)
Get the value at a specific index.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Keyframe blue
Curve representing the red value (0 - 255)
Json::Value add_property_json(string name, float value, string type, string memo, bool contains_point, int number_of_points, float min_value, float max_value, InterpolationType intepolation, int closest_point_x, bool readonly)
Generate JSON for a property.
string Id()
Get basic properties.
ChromaKey()
Blank constructor, useful when using Json to load the effect properties.
float Position()
Get position on timeline (in seconds)
string name
The name of the effect.
string PropertiesJSON(long int requested_frame)
string description
The description of this effect and what it does.
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
float X
The X value of the coordinate (usually representing the frame #)
Point GetClosestPoint(Point p)
Get current point (or closest point) from the X coordinate (i.e. the frame number) ...
tr1::shared_ptr< Frame > GetFrame(tr1::shared_ptr< Frame > frame, long int frame_number)
This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame...
This class represents a color (used on the timeline and clips)
int GetInt(long int index)
Get the rounded INT value at a specific index.
This namespace is the default namespace for all code in the openshot library.
long int GetCount()
Get the number of points (i.e. # of points)
Coordinate co
This is the primary coordinate.
bool has_video
Determines if this effect manipulates the image of a frame.
Exception for invalid JSON.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
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)
Constant curves jump from their previous position to a new one (with no interpolation).
float Start()
Get start position (in seconds) of clip (trim start of video)
EffectInfoStruct info
Information about the current effect.