21 init_effect_details();
28 init_effect_details();
32 void Shift::init_effect_details()
40 info.
description =
"Shift the image up, down, left, and right (with infinite wrapping).";
47 std::shared_ptr<openshot::Frame>
Shift::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
50 std::shared_ptr<QImage> frame_image = frame->GetImage();
51 unsigned char *pixels = (
unsigned char *) frame_image->bits();
54 double x_shift =
x.
GetValue(frame_number);
55 double x_shift_limit = fmod(fabs(x_shift), 1.0);
56 double y_shift =
y.
GetValue(frame_number);
57 double y_shift_limit = fmod(fabs(y_shift), 1.0);
60 unsigned char *temp_row =
new unsigned char[frame_image->width() * 4]();
64 for (
int row = 0; row < frame_image->height(); row++) {
66 int starting_row_pixel = row * frame_image->width();
67 memcpy(temp_row, &pixels[starting_row_pixel * 4],
sizeof(
char) * frame_image->width() * 4);
72 int relative_pixel_start = (int)round(frame_image->width() * x_shift_limit);
73 memcpy(&pixels[(starting_row_pixel + relative_pixel_start) * 4], &temp_row[0],
sizeof(
char) * (frame_image->width() - relative_pixel_start) * 4);
76 memcpy(&pixels[starting_row_pixel * 4], &temp_row[(frame_image->width() - relative_pixel_start) * 4],
sizeof(
char) * relative_pixel_start * 4);
77 }
else if (x_shift < 0.0) {
79 int relative_pixel_start = (int)round(frame_image->width() * x_shift_limit);
80 memcpy(&pixels[starting_row_pixel * 4], &temp_row[relative_pixel_start * 4],
sizeof(
char) * (frame_image->width() - relative_pixel_start) * 4);
83 memcpy(&pixels[(starting_row_pixel + (frame_image->width() - relative_pixel_start)) * 4], &temp_row[0],
sizeof(
char) * relative_pixel_start * 4);
88 unsigned char *temp_image =
new unsigned char[frame_image->width() * frame_image->height() * 4]();
89 memcpy(temp_image, pixels,
sizeof(
char) * frame_image->width() * frame_image->height() * 4);
95 int relative_pixel_start = frame_image->width() * (int)round(frame_image->height() * y_shift_limit);
96 memcpy(&pixels[relative_pixel_start * 4], temp_image,
sizeof(
char) * ((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4);
99 memcpy(pixels, &temp_image[((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4],
sizeof(
char) * relative_pixel_start * 4);
101 }
else if (y_shift < 0.0) {
103 int relative_pixel_start = frame_image->width() * (int)round(frame_image->height() * y_shift_limit);
104 memcpy(pixels, &temp_image[relative_pixel_start * 4],
sizeof(
char) * ((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4);
107 memcpy(&pixels[((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4], temp_image,
sizeof(
char) * relative_pixel_start * 4);
148 catch (
const std::exception& e)
151 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
162 if (!root[
"x"].isNull())
164 if (!root[
"y"].isNull())
179 return root.toStyledString();
Header file for all Exception classes.
Header file for Shift effect class.
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.
virtual Json::Value JsonValue() const
Generate Json::Value for this object.
Json::Value BasePropertiesJSON(int64_t requested_frame) const
Generate JSON object of base properties (recommended to be used by all effects)
virtual void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
EffectInfoStruct info
Information about the current effect.
Exception for invalid JSON.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
double GetValue(int64_t index) const
Get the value at a specific index.
Json::Value JsonValue() const
Generate Json::Value for this object.
Keyframe y
Shift the Y coordinates (up or down)
std::string Json() const override
Generate JSON string of this object.
Json::Value JsonValue() const override
Generate Json::Value for this object.
Keyframe x
Shift the X coordinates (left or right)
void SetJsonValue(const Json::Value root) override
Load Json::Value into this object.
std::string PropertiesJSON(int64_t requested_frame) const override
std::shared_ptr< openshot::Frame > GetFrame(int64_t frame_number) override
This method is required for all derived classes of ClipBase, and returns a new openshot::Frame object...
Shift()
Blank constructor, useful when using Json to load the effect properties.
void SetJson(const std::string value) override
Load JSON string into this object.
This namespace is the default namespace for all code in the openshot library.
const Json::Value stringToJson(const std::string value)
bool has_video
Determines if this effect manipulates the image of a frame.
bool has_audio
Determines if this effect manipulates the audio of a frame.
std::string class_name
The class name of the effect.
std::string name
The name of the effect.
std::string description
The description of this effect and what it does.