ClipBase.cpp

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// Copyright (c) 2008-2019 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#include "ClipBase.h"
#include "Timeline.h"
 
using namespace openshot;
 
// Set position on timeline (in seconds)
void ClipBase::Position(float value) {
 
    position = value;
 
    if (ParentTimeline()) {
        // Resort timeline items (internal clips/effects arrays)
        Timeline *parentTimeline = (Timeline *) ParentTimeline();
        parentTimeline->SortTimeline();
    }
}
 
// Set layer of clip on timeline (lower number is covered by higher numbers)
void ClipBase::Layer(int value) {
    layer = value;
 
    if (ParentTimeline()) {
        // Resort timeline items (internal clips/effects arrays)
        Timeline *parentTimeline = (Timeline *) ParentTimeline();
        parentTimeline->SortTimeline();
    }
}
 
// Set start position (in seconds) of clip (trim start of video)
void ClipBase::Start(float value) {
    start = value;
 
    if (ParentTimeline()) {
        // Resort timeline items (internal clips/effects arrays)
        Timeline *parentTimeline = (Timeline *) ParentTimeline();
        parentTimeline->SortTimeline();
    }
}
 
// Set end position (in seconds) of clip (trim end of video)
void ClipBase::End(float value) {
    end = value;
 
    if (ParentTimeline()) {
        // Resort timeline items (internal clips/effects arrays)
        Timeline *parentTimeline = (Timeline *) ParentTimeline();
        parentTimeline->SortTimeline();
    }
}
 
// Generate Json::Value for this object
Json::Value ClipBase::JsonValue() const {
 
    // Create root json object
    Json::Value root;
    root["id"] = Id();
    root["position"] = Position();
    root["layer"] = Layer();
    root["start"] = Start();
    root["end"] = End();
    root["duration"] = Duration();
 
    // return JsonValue
    return root;
}
 
// Load Json::Value into this object
void ClipBase::SetJsonValue(const Json::Value root) {
 
    // Set data from Json (if key is found)
    if (!root["id"].isNull())
        Id(root["id"].asString());
    if (!root["position"].isNull())
        Position(root["position"].asDouble());
    if (!root["layer"].isNull())
        Layer(root["layer"].asInt());
    if (!root["start"].isNull())
        Start(root["start"].asDouble());
    if (!root["end"].isNull())
        End(root["end"].asDouble());
}
 
// Generate JSON for a property
Json::Value ClipBase::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 {
 
    // Requested Point
    const Point requested_point(requested_frame, requested_frame);
 
    // Create JSON Object
    Json::Value prop = Json::Value(Json::objectValue);
    prop["name"] = name;
    prop["value"] = value;
    prop["memo"] = memo;
    prop["type"] = type;
    prop["min"] = min_value;
    prop["max"] = max_value;
    if (keyframe) {
        prop["keyframe"] = keyframe->Contains(requested_point);
        prop["points"] = int(keyframe->GetCount());
        Point closest_point = keyframe->GetClosestPoint(requested_point);
        prop["interpolation"] = closest_point.interpolation;
        prop["closest_point_x"] = closest_point.co.X;
        prop["previous_point_x"] = keyframe->GetPreviousPoint(closest_point).co.X;
    }
    else {
        prop["keyframe"] = false;
        prop["points"] = 0;
        prop["interpolation"] = CONSTANT;
        prop["closest_point_x"] = -1;
        prop["previous_point_x"] = -1;
    }
 
    prop["readonly"] = readonly;
    prop["choices"] = Json::Value(Json::arrayValue);
 
    // return JsonValue
    return prop;
}
 
Json::Value ClipBase::add_property_choice_json(std::string name, int value, int selected_value) const {
 
    // Create choice
    Json::Value new_choice = Json::Value(Json::objectValue);
    new_choice["name"] = name;
    new_choice["value"] = value;
    new_choice["selected"] = (value == selected_value);
 
    // return JsonValue
    return new_choice;
}