Negate.cpp
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/**
* @file
* @brief Source file for Negate class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../../include/effects/Negate.h"
using namespace openshot;
// Default constructor
Negate::Negate()
{
/// Initialize the values of the EffectInfo struct.
InitEffectInfo();
/// Set the effect info
info.class_name = "Negate";
info.name = "Negative";
info.description = "Negates the colors, producing a negative of the image.";
info.has_audio = false;
info.has_video = true;
}
// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
std::shared_ptr<Frame> Negate::GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number)
{
// Make a negative of the images pixels
frame->GetImage()->invertPixels();
// return the modified frame
return frame;
}
// Generate JSON string of this object
string Negate::Json() {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::JsonValue for this object
Json::Value Negate::JsonValue() {
// Create root json object
Json::Value root = EffectBase::JsonValue(); // get parent properties
root["type"] = info.class_name;
// return JsonValue
return root;
}
// Load JSON string into this object
void Negate::SetJson(string value) {
// Parse JSON string into JSON objects
Json::Value root;
Json::Reader reader;
bool success = reader.parse( value, root );
if (!success)
// Raise exception
throw InvalidJSON("JSON could not be parsed (or is invalid)", "");
try
{
// Set all values that match
SetJsonValue(root);
}
catch (exception e)
{
// Error parsing JSON (or missing keys)
throw InvalidJSON("JSON is invalid (missing keys or invalid data types)", "");
}
}
// Load Json::JsonValue into this object
void Negate::SetJsonValue(Json::Value root) {
// Set parent data
EffectBase::SetJsonValue(root);
}
// Get all properties for a specific frame
string Negate::PropertiesJSON(int64_t requested_frame) {
// Generate JSON properties list
Json::Value root;
root["id"] = add_property_json("ID", 0.0, "string", Id(), NULL, -1, -1, true, requested_frame);
root["position"] = add_property_json("Position", Position(), "float", "", NULL, 0, 30 * 60 * 60 * 48, false, requested_frame);
root["layer"] = add_property_json("Track", Layer(), "int", "", NULL, 0, 20, false, requested_frame);
root["start"] = add_property_json("Start", Start(), "float", "", NULL, 0, 30 * 60 * 60 * 48, false, requested_frame);
root["end"] = add_property_json("End", End(), "float", "", NULL, 0, 30 * 60 * 60 * 48, false, requested_frame);
root["duration"] = add_property_json("Duration", Duration(), "float", "", NULL, 0, 30 * 60 * 60 * 48, true, requested_frame);
// Return formatted string
return root.toStyledString();
}
openshot::Negate::SetJsonValue
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Definition: Negate.cpp:99
openshot::ClipBase::End
float End()
Get end position (in seconds) of clip (trim end of video)
Definition: ClipBase.h:86
openshot::ClipBase::add_property_json
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.
Definition: ClipBase.cpp:65
OpenShot Wipe Tests.e
e
Definition: OpenShot Wipe Tests.py:28
openshot::ClipBase::Layer
int Layer()
Get layer of clip on timeline (lower number is covered by higher numbers)
Definition: ClipBase.h:84
openshot::EffectBase::InitEffectInfo
void InitEffectInfo()
Definition: EffectBase.cpp:33
openshot::Negate::JsonValue
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Definition: Negate.cpp:65
openshot::EffectInfoStruct::class_name
string class_name
The class name of the effect.
Definition: EffectBase.h:51
openshot::EffectBase::JsonValue
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
Definition: EffectBase.cpp:69
openshot::EffectInfoStruct::has_audio
bool has_audio
Determines if this effect manipulates the audio of a frame.
Definition: EffectBase.h:56
openshot::ClipBase::Id
string Id()
Get basic properties.
Definition: ClipBase.h:82
openshot::Negate::GetFrame
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...
Definition: Negate.cpp:48
openshot::ClipBase::Position
float Position()
Get position on timeline (in seconds)
Definition: ClipBase.h:83
openshot::EffectInfoStruct::name
string name
The name of the effect.
Definition: EffectBase.h:53
openshot::EffectInfoStruct::description
string description
The description of this effect and what it does.
Definition: EffectBase.h:54
openshot::EffectBase::SetJsonValue
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
Definition: EffectBase.cpp:109
openshot::Negate::Negate
Negate()
Default constructor.
Definition: Negate.cpp:33
openshot
This namespace is the default namespace for all code in the openshot library.
Definition: AudioBufferSource.h:45
openshot::EffectInfoStruct::has_video
bool has_video
Determines if this effect manipulates the image of a frame.
Definition: EffectBase.h:55
openshot::InvalidJSON
Exception for invalid JSON.
Definition: Exceptions.h:152
openshot::Negate::Json
string Json()
Get and Set JSON methods.
Definition: Negate.cpp:58
openshot::Negate::SetJson
void SetJson(string value)
Load JSON string into this object.
Definition: Negate.cpp:76
openshot::ClipBase::Duration
float Duration()
Get the length of this clip (in seconds)
Definition: ClipBase.h:87
openshot::ClipBase::Start
float Start()
Get start position (in seconds) of clip (trim start of video)
Definition: ClipBase.h:85
openshot::Negate::PropertiesJSON
string PropertiesJSON(int64_t requested_frame)
Definition: Negate.cpp:107
openshot::EffectBase::info
EffectInfoStruct info
Information about the current effect.
Definition: EffectBase.h:73