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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 = true;
bool stalePrintout = true;
};
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;
}
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], data->pb->getTime());
}
} else {
switch(keycode) {
case 27: // Escape quits
std::cout << std::endl;
return true;
case 32: // Space pauses
data->play = ! data->play;
break;
case 65361: // Left seeks backward 1 frame
data->pb->seekFrame(data->pb->getFrame() - 1);
break;
case 65362: // Up seeks backward 1 second
if(data->pb->getTime() < 1) {
data->pb->seekTime(data->pb->getTime() * -1);
} else {
data->pb->seekTime(data->pb->getTime() - 1);
}
break;
case 65363: // Right seeks forward 1 frame
data->pb->seekFrame(data->pb->getFrame() + 1);
break;
case 65364: // Down seeks forward 1 second
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;
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>
shared_ptr<ui_impl> data = (shared_ptr<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 labs = data->llr->getSurrounding(time);
backend::label current;
if(labs.first.time == time) {
current = labs.first;
} else if(labs.second.time == time) {
current = labs.second;
} else {
}
} 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
}
}
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
cv::setMouseCallback("Video", mouseCallback, &data);
while(true) {
data->pb->display("Video");
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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