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#include "ui.h"
#include "playback.h"
#include "labeller.h"
#include <opencv2/opencv.hpp>
#include <iostream>
#include <sys/ioctl.h>
#include <unistd.h>
namespace frontend {
struct ui_impl {
std::shared_ptr<playback> pb;
std::shared_ptr<backend::labeller> llr;
bool play = false;
bool stalePrintout = true;
int rectIndex = -1;
};
ui::ui(std::shared_ptr<playback> playback, std::shared_ptr<backend::labeller> labeller) {
data = std::shared_ptr<ui_impl>(new ui_impl);
data->pb = playback;
data->llr = labeller;
if(!data->llr->getRectangleLabels().empty()) {
data->rectIndex = 0;
}
}
std::string getCurrentRectName(ui_impl* data) {
std::string name = "Rectangle";
if(data->rectIndex >= 0) {
name = data->llr->getRectangleLabels()[data->rectIndex];
}
return name;
}
std::pair<backend::label*, backend::label*> getSurroundingLabels(ui_impl* data, std::string name) {
std::pair<backend::label*, backend::label*> ret = {nullptr, nullptr};
auto &labs = data->llr->getEditableLabels();
for(auto it = labs.begin(); it != labs.end(); it++) {
if(it->name != name) {
continue;
}
if(it->time <= data->pb->getTime() && (!ret.first || ret.first->time < it->time)) {
ret.first = &(*it);
}
if(it->time > data->pb->getTime() && (!ret.second || ret.second->time > it->time)) {
ret.second = &(*it);
}
}
return ret;
}
std::vector<backend::label> getInterpolatedRectLabels(ui_impl* data) {
std::vector<backend::label> ret;
for(auto name : data->llr->getRectangleLabels()) {
auto p = getSurroundingLabels(data, name);
if(p.first && ! p.second) {
ret.push_back(*p.first);
} else if(p.first && p.second) {
backend::label l(p.first->name, data->pb->getTime());
double weight = (p.second->time-l.time)/(p.second->time-p.first->time);
l.location.x1 = weight*p.first->location.x1 + (1-weight)*p.second->location.x1;
l.location.x2 = weight*p.first->location.x2 + (1-weight)*p.second->location.x2;
l.location.y1 = weight*p.first->location.y1 + (1-weight)*p.second->location.y1;
l.location.y2 = weight*p.first->location.y2 + (1-weight)*p.second->location.y2;
ret.push_back(l);
}
}
return ret;
}
backend::label* getCurrentRectLabel(ui_impl* data) {
return getSurroundingLabels(data, getCurrentRectName(data)).first;
}
bool handleKey(int keycode, const std::shared_ptr<ui_impl>& data) {
if(keycode != -1) {
data->stalePrintout = true;
if(keycode >= 48 && keycode <= 57) { // Number -> label
std::size_t num = keycode - 48;
if(num <= data->llr->getLabels().size()) {
data->llr->applyLabel(data->llr->getLabels()[num-1], data->pb->getTime());
}
} else {
switch(keycode) {
case 27: // Escape quits
data->pb->release();
std::cout << std::endl;
return true;
case 32: // Space pauses
data->play = ! data->play;
break;
case 104:
case 65361: // Left seeks backward 1 frame (or h)
data->pb->seekFrame(data->pb->getFrame() - 1);
break;
case 100:
case 65362: // Up seeks backward 1 second (or d)
if(data->pb->getTime() < 1) {
data->pb->seekTime(data->pb->getTime() * -1);
} else {
data->pb->seekTime(data->pb->getTime() - 1);
}
break;
case 116:
case 65363: // Right seeks forward 1 frame (or t)
data->pb->seekFrame(data->pb->getFrame() + 1);
break;
case 110:
case 65364: // Down seeks forward 1 second (or n)
data->pb->seekTime(data->pb->getTime() + 1);
break;
case 117: // u undoes
data->llr->undo();
break;
case 114: // r redoes
data->llr->redo();
break;
case 65535: // DEL deletes
data->llr->deleteLabel(data->pb->getTime());
break;
case 115: // s saves
data->llr->save();
break;
case 99: // c cycles rect labels
if(!data->llr->getRectangleLabels().empty()) {
data->rectIndex = (data->rectIndex + 1) % data->llr->getRectangleLabels().size();
}
std::cout << "Set rect name to " << getCurrentRectName(data.get()) << std::endl;
break;
default:
std::cout << "Pressed the " << keycode << " key" << std::endl;
break;
}
}
}
return false;
}
void mouseCallback(int event, int x, int y, int flags, void* userdata) {
// userdata is actually a &shared_ptr<ui_impl>
auto data = static_cast<ui_impl*>(userdata);
static bool mouseDown = false;
// We're interested in left button down/up and movement when down
if(event == cv::EVENT_LBUTTONDOWN) {
// If the current frame doesn't have a rectangle label, then make one
mouseDown = true;
double time = data->pb->getTime();
auto lab = getCurrentRectLabel(data);
if(lab && lab->time == time) {
// Use this one
} else { // Make one
data->llr->applyLabel(getCurrentRectName(data), time);
lab = &data->llr->getEditableLabels().back();
}
lab->location.x1 = lab->location.x2 = x;
lab->location.y1 = lab->location.y2 = y;
} else if(event == cv::EVENT_LBUTTONUP) {
// Mouse is no longer down
mouseDown = false;
} else if(event == cv::EVENT_MOUSEMOVE) {
// If the mouse is down, update x2 and y2 of current window
if(mouseDown) {
auto lab = getCurrentRectLabel(data);
if(lab) {
lab->location.x2 = x;
lab->location.y2 = y;
} else {
std::cout << "ERROR: Invalid label!" << std::endl;
}
}
}
}
void ui::begin() {
std::cout << "Playing a video that's " << data->pb->getMaxFrame() << " frames (" << data->pb->getMaxTime() << " seconds) long." << std::endl;
std::cout << "Annotations:" << std::endl;
int num = 0;
for(auto ann : data->llr->getLabels()) {
std::cout << ++num << ": " << ann << std::endl;
}
// Get window size
struct winsize size;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &size);
int cols = size.ws_col;
// Register mouse callback
data->pb->display("Video", getInterpolatedRectLabels(data.get()));
cv::setMouseCallback("Video", mouseCallback, data.get());
while(true) {
data->pb->display("Video", getInterpolatedRectLabels(data.get()));
data->pb->interFrameSleep();
if(handleKey(cv::pollKey(), data)) {
break;
}
if(data->play) {
data->pb->seekFrame(data->pb->getFrame() + 1);
}
if(data->play || data->stalePrintout) {
std::stringstream toPrint;
toPrint << "Frame: " << data->pb->getFrame() << " (" << std::setprecision(4) << std::setw(6) << std::left << data->pb->getTime() << " s)";
std::string timeString = toPrint.str();
toPrint.str(""); // clear contents
// Get surrounding labels
auto labs = data->llr->getSurrounding(data->pb->getTime());
if(! labs.first.name.empty()) toPrint << labs.first.name << " (t=" << std::setprecision(4) << labs.first.time << ")";
else toPrint << "START (t=0)";
toPrint << " CURRENT ";
if(! labs.second.name.empty()) toPrint << labs.second.name << " (t=" << std::setprecision(4) << labs.second.time << ")";
else toPrint << "END (t=" << data->pb->getMaxTime() << ")";
toPrint << std::string(cols - toPrint.str().size() - timeString.size() - 1, ' ') << timeString;
std::cout << "\r\b\r" << toPrint.str();
std::cout.flush();
data->stalePrintout = false;
}
}
}
}
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