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Stabilizer.cpp
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Stabilizer.cpp
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/**
* @file
* @brief Source file for Stabilizer effect class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 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/Stabilizer.h"
using namespace openshot;
/// Blank constructor, useful when using Json to load the effect properties
Stabilizer::Stabilizer(std::string clipStabilizedDataPath):protobuf_data_path(clipStabilizedDataPath)
{
// Init effect properties
init_effect_details();
// Tries to load the stabilization data from protobuf
LoadStabilizedData(clipStabilizedDataPath);
}
// Default constructor
Stabilizer::Stabilizer()
{
// Init effect properties
init_effect_details();
// LoadStabilizedData("/home/gustavostahl/LabVisao/VideoEditor/openshot-qt/stabilization.data");
}
// Init effect settings
void Stabilizer::init_effect_details()
{
/// Initialize the values of the EffectInfo struct.
InitEffectInfo();
/// Set the effect info
info.class_name = "Stabilizer";
info.name = "Stabilizer";
info.description = "Stabilize video clip to remove undesired shaking and jitter.";
info.has_audio = false;
info.has_video = true;
protobuf_data_path = "";
}
// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
std::shared_ptr<Frame> Stabilizer::GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number)
{
// Grab OpenCV Mat image
cv::Mat frame_image = frame->GetImageCV();
// If frame is NULL, return itself
if(!frame_image.empty()){
// Check if track data exists for the requested frame
if(transformationData.find(frame_number) != transformationData.end()){
// Create empty rotation matrix
cv::Mat T(2,3,CV_64F);
// Set rotation matrix values
T.at<double>(0,0) = cos(transformationData[frame_number].da);
T.at<double>(0,1) = -sin(transformationData[frame_number].da);
T.at<double>(1,0) = sin(transformationData[frame_number].da);
T.at<double>(1,1) = cos(transformationData[frame_number].da);
T.at<double>(0,2) = transformationData[frame_number].dx;
T.at<double>(1,2) = transformationData[frame_number].dy;
// Apply rotation matrix to image
cv::Mat frame_stabilized;
cv::warpAffine(frame_image, frame_stabilized, T, frame_image.size());
// Scale up the image to remove black borders
cv::Mat T_scale = cv::getRotationMatrix2D(cv::Point2f(frame_stabilized.cols/2, frame_stabilized.rows/2), 0, 1.04);
cv::warpAffine(frame_stabilized, frame_stabilized, T_scale, frame_stabilized.size());
frame_image = frame_stabilized;
}
}
// Set stabilized image to frame
// If the input image is NULL or doesn't have tracking data, it's returned as it came
frame->SetImageCV(frame_image);
return frame;
}
// Load protobuf data file
bool Stabilizer::LoadStabilizedData(std::string inputFilePath){
// Create stabilization message
libopenshotstabilize::Stabilization stabilizationMessage;
// Read the existing tracker message.
fstream input(inputFilePath, ios::in | ios::binary);
if (!stabilizationMessage.ParseFromIstream(&input)) {
cerr << "Failed to parse protobuf message." << endl;
return false;
}
// Make sure the data maps are empty
transformationData.clear();
trajectoryData.clear();
// Iterate over all frames of the saved message and assign to the data maps
for (size_t i = 0; i < stabilizationMessage.frame_size(); i++) {
// Create stabilization message
const libopenshotstabilize::Frame& pbFrameData = stabilizationMessage.frame(i);
// Load frame number
size_t id = pbFrameData.id();
// Load camera trajectory data
float x = pbFrameData.x();
float y = pbFrameData.y();
float a = pbFrameData.a();
// Assign data to trajectory map
trajectoryData[i] = EffectCamTrajectory(x,y,a);
// Load transformation data
float dx = pbFrameData.dx();
float dy = pbFrameData.dy();
float da = pbFrameData.da();
// Assing data to transformation map
transformationData[id] = EffectTransformParam(dx,dy,da);
}
// Show the time stamp from the last update in stabilization data file
if (stabilizationMessage.has_last_updated()) {
cout << " Loaded Data. Saved Time Stamp: " << TimeUtil::ToString(stabilizationMessage.last_updated()) << endl;
}
// Delete all global objects allocated by libprotobuf.
google::protobuf::ShutdownProtobufLibrary();
return true;
}
// Generate JSON string of this object
std::string Stabilizer::Json() const {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::Value for this object
Json::Value Stabilizer::JsonValue() const {
// Create root json object
Json::Value root = EffectBase::JsonValue(); // get parent properties
root["type"] = info.class_name;
root["protobuf_data_path"] = protobuf_data_path;
// return JsonValue
return root;
}
// Load JSON string into this object
void Stabilizer::SetJson(const std::string value) {
// Parse JSON string into JSON objects
try
{
const Json::Value root = openshot::stringToJson(value);
// Set all values that match
SetJsonValue(root);
}
catch (const std::exception& e)
{
// Error parsing JSON (or missing keys)
throw InvalidJSON("JSON is invalid (missing keys or invalid data types)");
}
}
// Load Json::Value into this object
void Stabilizer::SetJsonValue(const Json::Value root) {
// Set parent data
EffectBase::SetJsonValue(root);
// Set data from Json (if key is found)
if (!root["protobuf_data_path"].isNull()){
protobuf_data_path = (root["protobuf_data_path"].asString());
if(!LoadStabilizedData(protobuf_data_path)){
std::cout<<"Invalid protobuf data path";
protobuf_data_path = "";
}
}
}
// Get all properties for a specific frame
std::string Stabilizer::PropertiesJSON(int64_t requested_frame) const {
// 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, 1000 * 60 * 30, 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, 1000 * 60 * 30, false, requested_frame);
root["end"] = add_property_json("End", End(), "float", "", NULL, 0, 1000 * 60 * 30, false, requested_frame);
root["duration"] = add_property_json("Duration", Duration(), "float", "", NULL, 0, 1000 * 60 * 30, true, requested_frame);
// Return formatted string
return root.toStyledString();
}