892 lines
32 KiB
JavaScript
892 lines
32 KiB
JavaScript
if(Debug.debug)
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console.log("Loading: ArDetect");
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var _ard_console_stop = "background: #000; color: #f41";
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var _ard_console_start = "background: #000; color: #00c399";
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var _ard_currentAr;
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var _ard_setup_timer;
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var _ard_timer
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// kjer vzemamo vzorce za blackbox/stuff. 9 vzorcev. Če spremenimo velikost vzorca, moramo spremeniti tudi vrednosti v tej tabeli
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// vrednosti v tabeli so na osminskih intervalih od [0, <sample height * 4> - 4].
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// we sample these lines in blackbox/stuff. 9 samples. If we change the canvas sample size, we have to correct these values as well
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// samples are every eighth between [0, <sample height * 4> - 4].
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var _ard_sampleLines = [ 0, 360, 720, 1080, 1440, 1800, 2160, 2520, 2876];
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var _ard_sampleCols = [ 128, 256, 384, 512, 640, 768, 896, 1024, 1125 ];
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var _ard_canvasWidth;
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var _ard_canvasHeight;
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var _ard_canvasDrawWindowHOffset = 0;
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var localSettings = {};
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// **** FUNCTIONS **** //
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var _arSetup = function(cwidth, cheight){
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_setup] Starting automatic aspect ratio detection", _ard_console_start);
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this._halted = false;
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var existingCanvas = document.getElementById("uw_ArDetect_canvas");
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if(existingCanvas){
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if(Debug.debug)
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console.log("[ArDetect::_ard_setup] existing canvas found. REMOVING KEBAB removing kebab\n\n\n\n(im hungry and you're not authorized to have it)");
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existingCanvas.remove();
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if(Debug.debug)
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console.log("[ArDetect::_ard_setup] canvas removed");
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}
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var vid = document.getElementsByTagName("video")[0];
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if(vid === undefined){
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_ard_setup_timer = setTimeout(_arSetup, 1000);
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return;
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}
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// imamo video, pa tudi problem. Ta problem bo verjetno kmalu popravljen, zato setup začnemo hitreje kot prej
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// we have a video, but also a problem. This problem will prolly be fixed very soon, so setup is called with
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// less delay than before
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if(vid.videoWidth === 0 || vid.videoHeight === 0){
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_ard_setup_timer = setTimeout(_arSetup, 100);
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return;
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}
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var canvas = document.createElement("canvas");
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canvas.style.position = "absolute";
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//todo: change those values to push canvas off-screen
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_ard_canvasWidth = cwidth ? cwidth : Settings.arDetect.hSamples;
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_ard_canvasHeight = cheight ? cheight : Settings.arDetect.vSamples;
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if(Debug.showArDetectCanvas){
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canvas.style.left = "200px";
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canvas.style.top = "780px";
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canvas.style.zIndex = 10000;
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}
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else{
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canvas.style.left = "-20000px";
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canvas.style.top = "-1080px";
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canvas.style.zIndex = -10000;
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}
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canvas.id = "uw_ArDetect_canvas";
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var test = document.getElementsByTagName("body")[0];
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test.appendChild(canvas);
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var context = canvas.getContext("2d");
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// do setup once
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// tho we could do it for every frame
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if(cwidth && cheight){
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var canvasWidth = cwidth;
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var canvasHeight = cheight;
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var canvasScaleFactor = cheight / vid.videoHeight;
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}
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else{
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var canvasScaleFactor = _ard_canvasWidth / vid.videoWidth;
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var canvasWidth = vid.videoWidth * canvasScaleFactor;
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var canvasHeight = vid.videoHeight * canvasScaleFactor;
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}
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canvas.width = canvasWidth;
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canvas.height = canvasHeight;
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try{
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// determine where to sample
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var ncol = Settings.arDetect.staticSampleCols;
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var nrow = Settings.arDetect.staticSampleRows;
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var colSpacing = _ard_canvasWidth / ncol;
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var rowSpacing = (_ard_canvasHeight * 4) / nrow;
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_ard_sampleLines = [];
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_ard_sampleCols = [];
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for(var i = 0; i < ncol; i++){
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if(i < ncol - 1)
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_ard_sampleCols.push(Math.round(colSpacing * i));
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else{
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_ard_sampleCols.push(Math.round(colSpacing * i) - 1);
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}
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}
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for(var i = 0; i < nrow; i++){
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if(i < ncol - 5)
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_ard_sampleLines.push(Math.round(rowSpacing * i));
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else{
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_ard_sampleLines.push(Math.round(rowSpacing * i) - 4);
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}
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}
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}
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catch(ex){
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console.log("%c[ArDetect::_arSetup] something went terribly wrong when calcuating sample colums.", Settings.colors.criticalFail);
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console.log("settings object:", Settings);
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console.log("error:", ex);
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}
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_ard_resetBlackLevel();
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this._forcehalt = false;
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// if we're restarting ArDetect, we need to do this in order to force-recalculate aspect ratio
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GlobalVars.lastAr = {type: "auto", ar: null};
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_ard_vdraw(vid, context, canvasWidth, canvasHeight, false);
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};
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var _ard_canvasReadyForDrawWindow = function(){
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_canvasReadyForDrawWindow] (?)", "color: #44f", _ard_canvasHeight == window.innerHeight, "(ard_height:", _ard_canvasHeight, "| window height:", window.innerHeight, ")");
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return _ard_canvasHeight == window.innerHeight
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}
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var _ard_processAr = function(video, width, height, edge_h, edge_w, fallbackMode){
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// width, height —> canvas/sample
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// edge_w -—> null/undefined, because we don't autocorrect pillarbox yet
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if(Debug.debug && Debug.debugArDetect){
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console.log("[ArDetect::_ard_processAr] processing ar. sample width:", width, "; sample height:", height, "; edge top:", edge_h);
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}
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// if we don't specify these things, they'll have some default values.
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if(edge_h === undefined){
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edge_h = 0;
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edge_w = 0;
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}
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var letterbox = 2 * edge_h;
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var trueHeight = height - letterbox;
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if(fallbackMode){
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if(edge_h > 1 && edge_h < 20)
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return;
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// let's add some safety border to avoid automatic ar toggling between 21:9 and 16:9
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trueHeight += 6;
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}
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var trueAr = width / trueHeight;
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ArDetect.detectedAr = trueAr;
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// poglejmo, če se je razmerje stranic spremenilo
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// check if aspect ratio is changed:
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if(GlobalVars.lastAr.type == "auto" && GlobalVars.lastAr.ar != null){
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// spremembo lahko zavrnemo samo, če uporabljamo avtomatski način delovanja in če smo razmerje stranic
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// že nastavili.
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//
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// we can only deny aspect ratio changes if we use automatic mode and if aspect ratio was set from here.
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var arDiff = trueAr - GlobalVars.lastAr.ar;
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if (arDiff < 0)
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arDiff = -arDiff;
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var arDiff_percent = arDiff / trueAr;
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// ali je sprememba v mejah dovoljenega? Če da -> fertik
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// is ar variance within acceptable levels? If yes -> we done
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if(Debug.debug && Debug.debugArDetect)
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console.log("%c[ArDetect::_ard_processAr] new aspect ratio varies from the old one by this much:\n","color: #aaf","old Ar", GlobalVars.lastAr.ar, "current ar", trueAr, "arDiff (absolute):",arDiff,"ar diff (relative to new ar)", arDiff_percent);
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if (arDiff < trueAr * Settings.arDetect.allowedArVariance){
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if(Debug.debug && Debug.debugArDetect)
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console.log("%c[ArDetect::_ard_processAr] aspect ratio change denied — diff %:", "background: #740; color: #fa2", arDiff_percent)
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return;
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}
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else if(Debug.debug && Debug.debugArDetect){
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console.log("%c[ArDetect::_ard_processAr] aspect ratio change accepted — diff %:", "background: #153; color: #4f9", arDiff_percent)
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}
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}
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if(Debug.debug)
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console.log("[ArDetect::_ard_processAr] attempting to fix aspect ratio. New aspect ratio: ", trueAr);
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// POMEMBNO: GlobalVars.lastAr je potrebno nastaviti šele po tem, ko kličemo _res_setAr(). _res_setAr() predvideva,
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// da želimo nastaviti statično (type: 'static') razmerje stranic — tudi, če funkcijo kličemo tu oz. v ArDetect.
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//
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// IMPORTANT NOTE: GlobalVars.lastAr needs to be set after _res_setAr() is called, as _res_setAr() assumes we're
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// setting a static aspect ratio (even if the function is called from here or ArDetect).
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Resizer.setAr(trueAr);
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GlobalVars.lastAr = {type: "auto", ar: trueAr};
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}
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var _ard_vdraw = function (vid, context, w, h, conf){
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try{
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if(this._forcehalt)
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return;
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var fallbackMode = false;
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var startTime = performance.now();
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var baseTimeout = Settings.arDetect.timer_playing;
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var triggerTimeout;
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var guardLineResult = true; // true if success, false if fail. true by default
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var imageDetectResult = false; // true if we detect image along the way. false by default
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var sampleCols = _ard_sampleCols;
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var how_far_treshold = 8; // how much can the edge pixel vary (*4)
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if(vid == null || vid.paused || vid.ended || Status.arStrat != "auto"){
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// we slow down if paused, no detection
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_ard_timer = setTimeout(_ard_vdraw, Settings.arDetect.timer_paused, vid, context, w, h);
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return false;
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}
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try{
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context.drawImage(vid, 0,0, w, h);
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}
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catch(ex){
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_vdraw] can't draw image on canvas. Trying canvas.drawWindow instead", "color:#000; backgroud:#f51;", ex);
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try{
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if(_ard_canvasReadyForDrawWindow()){
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context.drawWindow(window, _ard_canvasDrawWindowHOffset, 0, w, h, "rgba(0,0,0,1)");
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_vdraw] canvas.drawImage seems to have worked", "color:#000; backgroud:#2f5;");
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fallbackMode = true;
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}
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else{
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// canvas needs to be resized, so let's change setup
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_ard_stop();
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var newCanvasWidth = window.innerHeight * 1.77;
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var newCanvasHeight = window.innerHeight;
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if(Settings.miscFullscreenSettings.videoFloat == "center")
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_ard_canvasDrawWindowHOffset = Math.round((window.innerWidth - newCanvasWidth) * 0.5);
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else if(Settings.miscFullscreenSettings.videFloat == "left")
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_ard_canvasDrawWindowHOffset = 0;
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else
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_ard_canvasDrawWindowHOffset = window.innerWidth - newCanvasWidth;
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_arSetup(newCanvasWidth, newCanvasHeight);
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return;
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}
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}
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catch(ex){
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_vdraw] okay this didnt work either", "color:#000; backgroud:#f51;", ex);
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_ard_timer = setTimeout(_ard_vdraw, Settings.arDetect.timer_error, vid, context, w, h);
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return;
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}
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// _ard_timer = setTimeout(_ard_vdraw, Settings.arDetect.timer_error, vid, context, w, h);
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// return;
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}
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var cols = [];
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for(var i = 0; i < sampleCols.length; i++){
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//where-x, where-y, how wide, how tall
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//random col, first y, 1 pix wide, all pixels tall
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cols[i] = context.getImageData(sampleCols[i], 0, 1, h).data;
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}
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// fast test to see if aspect ratio is correct. If we detect anything darker than blackLevel, we modify
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// blackLevel to the new lowest value
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var isLetter=true;
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var currentMaxVal;
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var currentMax_a, currentMax_b;
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var bottom_r = cols[0].length - 4;
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var bottom_g = bottom_r + 1;
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var bottom_b = bottom_r + 2;
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for(var i in cols){
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// get biggest brightness in the top and bottom row across all three RGB components
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currentMax_a = cols[i][0] > cols[i][1] ? cols[i][0] : cols[i][1];
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currentMax_b = cols[i][bottom_r] > cols[i][bottom_g] ? cols[i][bottom_r] : cols[i][bottom_g];
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currentMaxVal = cols[i][2] > cols[i][bottom_b] ? cols[i][2] : cols[i][bottom_b];
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currentMax_a = currentMax_a > currentMax_b ? currentMax_a : currentMax_b;
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currentMaxVal = currentMaxVal > currentMax_a ? currentMaxVal : currentMax_a;
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// if any of those points fails this check, we aren't letterboxed
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isLetter &= currentMaxVal <= (GlobalVars.arDetect.blackLevel + Settings.arDetect.blackbarTreshold);
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// any single point on that list could be the darkest black, so we still check if we can lower blackLevel
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if(currentMaxVal < GlobalVars.arDetect.blackLevel){
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GlobalVars.arDetect.blackLevel = currentMaxVal;
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}
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}
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cols = null;
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if(!isLetter){
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// Če ne zaznamo letterboxa, kličemo reset. Lahko, da je bilo razmerje stranic popravljeno na roke. Možno je tudi,
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// da je letterbox izginil.
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// If we don't detect letterbox, we reset aspect ratio to aspect ratio of the video file. The aspect ratio could
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// have been corrected manually. It's also possible that letterbox (that was there before) disappeared.
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if(Debug.debug){
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console.log("%c[ArDetect::_ard_vdraw] no edge detected. canvas has no edge.", "color: #aaf");
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}
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Resizer.reset();
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GlobalVars.lastAr = {type: "auto", ar: null};
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triggerTimeout = _ard_getTimeout(baseTimeout, startTime);
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_ard_timer = setTimeout(_ard_vdraw, triggerTimeout , vid, context, w, h); //no letterbox, no problem
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return;
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}
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// let's do a quick test to see if we're on a black frame
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// TODO: reimplement but with less bullshit
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// poglejmo, če obrežemo preveč.
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// let's check if we're cropping too much (or whatever)
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var guardLineOut;
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var imageDetectOut;
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if(Settings.arDetect.guardLine.enabled){
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guardLineOut = _ard_guardLineCheck(context);
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guardLineResult = guardLineOut.success;
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if(! guardLineResult ){ // add new ssamples to our sample columns
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for(var col of guardLineOut.offenders){
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sampleCols.push(col)
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}
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}
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imageDetectOut = _ard_guardLineImageDetect(context);
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imageDetectResult = imageDetectOut.success;
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// če sta obe funkciji uspeli, potem se razmerje stranic ni spremenilo.
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// if both succeed, then aspect ratio hasn't changed.
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if(imageDetectResult && guardLineResult){
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triggerTimeout = _ard_getTimeout(baseTimeout, startTime);
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_ard_timer = setTimeout(_ard_vdraw, triggerTimeout , vid, context, w, h); //no letterbox, no problem
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return;
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}
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}
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// pa poglejmo, kje se končajo črne letvice na vrhu in na dnu videa.
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// let's see where black bars end.
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GlobalVars.sampleCols_current = sampleCols.length;
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var blackbarSamples = _ard_findBlackbarLimits(context, sampleCols);
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var edgeCandidates = _ard_edgeDetect(context, blackbarSamples);
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var edgePost = _ard_edgePostprocess(edgeCandidates, context.canvas.height);
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if(edgePost.status == "ar_known"){
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_ard_processAr(vid, w, h, edgePost.blackbarWidth, null, fallbackMode);
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// we also know edges for guardline, so set them
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GlobalVars.arDetect.guardLine.top = edgePost.guardLineTop;
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GlobalVars.arDetect.guardLine.bottom = edgePost.guardLineBottom;
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triggerTimeout = _ard_getTimeout(baseTimeout, startTime);
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_ard_timer = setTimeout(_ard_vdraw, triggerTimeout , vid, context, w, h); //no letterbox, no problem
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return;
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}
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else{
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triggerTimeout = _ard_getTimeout(baseTimeout, startTime);
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_ard_timer = setTimeout(_ard_vdraw, triggerTimeout , vid, context, w, h); //no letterbox, no problem
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return;
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}
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}
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catch(e){
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if(Debug.debug)
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console.log("%c[ArDetect::_ard_vdraw] vdraw has crashed for some reason ???. Error here:", "color: #000; background: #f80", e);
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_ard_timer = setTimeout(_ard_vdraw, Settings.arDetect.timer_playing, vid, context, w, h);
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}
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}
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function _ard_guardLineCheck(context){
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// this test tests for whether we crop too aggressively
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// if this test is passed, then aspect ratio probably didn't change from wider to narrower. However, further
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// checks are needed to determine whether aspect ratio got wider.
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// if this test fails, it returns a list of offending points.
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// if the upper edge is null, then edge hasn't been detected before. This test is pointless, therefore it
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// should succeed by default. Also need to check bottom, for cases where only one edge is known
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try{
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if(GlobalVars.arDetect.guardLine.top == null || GlobalVars.arDetect.guardLine.bottom == null)
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return { success: true };
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var blackbarTreshold = GlobalVars.arDetect.blackLevel + Settings.arDetect.blackbarTreshold;
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var edges = GlobalVars.arDetect.guardLine;
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var start = parseInt(_ard_canvasWidth * Settings.arDetect.guardLine.ignoreEdgeMargin);
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var width = _ard_canvasWidth - (start << 1);
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var offenders = [];
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var firstOffender = -1;
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var offenderCount = -1; // doing it this way means first offender has offenderCount==0. Ez index.
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}
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catch(e){
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console.log("%c[ArDetect::_ard_guardLineCheck] guardline crashed for some reason??\n----\n", "color: #000; background: #f62", e, "%c\n----");
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return {success: false};
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}
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// TODO: implement logo check.
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// preglejmo obe vrstici
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// check both rows
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var rows = [];
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var ytolerance = Settings.arDetect.guardLine.edgeTolerancePx;
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if(edges.top - ytolerance > 0){
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rows.push(context.getImageData(start, edges.top - ytolerance, width, 1).data);
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}
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if(edges.bottom + ytolerance < context.canvas.height){
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rows.push(context.getImageData(start, edges.bottom + ytolerance, width, 1).data);
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}
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// context.font = "16px Overpass Mono";
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//
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// context.fillStyle = 'rgb(255, 192, 32)';
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// context.fillText(("UPPER EDGE: "+edges.top ), 16, 12)
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//
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// context.fillStyle = 'rgb(32, 64, 255)';
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// context.fillText(("LOWER EDGE: "+edges.bottom ), 16, 32)
|
|
//
|
|
//
|
|
// context.fillStyle = 'rgb(255, 192, 32)';
|
|
// context.fillRect(0,0,10,edges.top);
|
|
//
|
|
// context.fillStyle = 'rgb(32, 64, 255)';
|
|
// context.fillRect(0,edges.bottom, 10, edges.bottom);
|
|
//
|
|
//
|
|
// console.log("guardline - rows:", rows);
|
|
|
|
for(var row of rows){
|
|
for(var i = 0; i < row.length; i+=4){
|
|
|
|
// we track sections that go over what's supposed to be a black line, so we can suggest more
|
|
// columns to sample
|
|
if(row[i] > blackbarTreshold || row[i+1] > blackbarTreshold || row[i+2] > blackbarTreshold){
|
|
if(firstOffender < 0){
|
|
firstOffender = i >> 2;
|
|
offenderCount++;
|
|
offenders.push({x: firstOffender, width: 1})
|
|
}
|
|
else{
|
|
offenders[offenderCount].width++
|
|
}
|
|
}
|
|
else{
|
|
// is that a black pixel again? Let's reset the 'first offender'
|
|
firstOffender = -1;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
|
|
// če nismo našli nobenih prekrškarjev, vrnemo uspeh. Drugače vrnemo seznam prekrškarjev
|
|
// vrnemo tabelo, ki vsebuje sredinsko točko vsakega prekrškarja (x + width*0.5)
|
|
//
|
|
// if we haven't found any offenders, we return success. Else we return list of offenders
|
|
// we return array of middle points of offenders (x + (width >> 1) for every offender)
|
|
|
|
if(offenderCount == -1){
|
|
console.log("guardline - no black line violations detected.");
|
|
return {success: true};
|
|
}
|
|
|
|
console.log("guardline failed.");
|
|
|
|
var ret = new Array(offenders.length);
|
|
for(var o in offenders){
|
|
ret[o] = offenders[o].x + (offenders[o].width >> 2);
|
|
}
|
|
|
|
return {success: false, offenders: ret};
|
|
}
|
|
|
|
function _ard_guardLineImageDetect(context){
|
|
if(GlobalVars.arDetect.guardLine.top == null)
|
|
return { success: false };
|
|
|
|
var blackbarTreshold = GlobalVars.arDetect.blackLevel + Settings.arDetect.blackbarTreshold;
|
|
var edges = GlobalVars.arDetect.guardLine;
|
|
var start = parseInt(_ard_canvasWidth * Settings.arDetect.guardLine.ignoreEdgeMargin);
|
|
var width = _ard_canvasWidth - (start << 1);
|
|
|
|
// TODO: implement logo check.
|
|
|
|
|
|
// preglejmo obe vrstici
|
|
// check both rows
|
|
|
|
var complyingCount = 0;
|
|
var complyingTreshold = (context.canvas.width * Settings.arDetect.guardLine.imageTestTreshold) << 1;
|
|
|
|
for(var edge of [ edges.top, edges.bottom ]){
|
|
var row = context.getImageData(start, edges.top, width, 1).data;
|
|
for(var i = 0; i < row.length; i+=4){
|
|
|
|
// we track sections that go over what's supposed to be a black line, so we can suggest more
|
|
// columns to sample
|
|
if(row[i] > blackbarTreshold || row[i+1] > blackbarTreshold || row[i+2] > blackbarTreshold){
|
|
complyingCount++;
|
|
if(complyingCount > complyingTreshold){
|
|
return {success: true}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return {success: false};
|
|
}
|
|
|
|
function _ard_findBlackbarLimits(context, cols){
|
|
var data = [];
|
|
var middle, bottomStart, blackbarTreshold, top, bottom;
|
|
var res = [];
|
|
|
|
middle = context.canvas.height << 1 // x2 = middle of data column
|
|
bottomStart = (context.canvas.height - 1) << 2; // (height - 1) x 4 = bottom pixel
|
|
blackbarTreshold = GlobalVars.arDetect.blackLevel + Settings.arDetect.blackbarTreshold;
|
|
|
|
var found;
|
|
|
|
for(var col of cols){
|
|
found = false;
|
|
|
|
data = context.getImageData(col, 0, 1, context.canvas.height).data;
|
|
|
|
for(var i = 0; i < middle; i+=4){
|
|
if(data[i] > blackbarTreshold || data[i+1] > blackbarTreshold || data[i+2] > blackbarTreshold){
|
|
top = (i >> 2) - 1;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if(!found)
|
|
top = -1; // universal "not found" mark. We don't break because the bottom side can still give good info
|
|
|
|
found = false; // reset
|
|
|
|
for(var i = bottomStart; i > middle; i-=4){
|
|
if(data[i] > blackbarTreshold || data[i+1] > blackbarTreshold || data[i+2] > blackbarTreshold){
|
|
bottom = (i >> 2) + 1;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!found)
|
|
bottom = -1;
|
|
|
|
res.push({col: col, bottom: bottom, top: top, bottomRelative: context.canvas.height - bottom});
|
|
}
|
|
|
|
if(Debug.debug && Debug.debugArDetect)
|
|
console.log("[ArDetect::_ard_findBlackbarLimits] found some candidates for black bar limits", res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
function _ard_edgeDetect(context, samples){
|
|
var edgeCandidatesTop = {};
|
|
var edgeCandidatesBottom = {};
|
|
|
|
var sampleWidthBase = Settings.arDetect.edgeDetection.sampleWidth;
|
|
var halfSample = sampleWidthBase >> 1;
|
|
var detections;
|
|
var detectionTreshold = Settings.arDetect.edgeDetection.detectionTreshold;
|
|
var canvasWidth = context.canvas.width;
|
|
var canvasHeight = context.canvas.height;
|
|
|
|
var sampleStart, sampleWidth;
|
|
|
|
var imageData = [];
|
|
var blackEdgeViolation = false;
|
|
var blackbarTreshold = GlobalVars.arDetect.blackLevel + Settings.arDetect.blackbarTreshold;
|
|
|
|
var topEdgeCount = 0;
|
|
var bottomEdgeCount = 0;
|
|
|
|
|
|
for(sample of samples){
|
|
// determine size of the square
|
|
|
|
sampleStart = sample.col - halfSample;
|
|
|
|
if(sampleStart < 0)
|
|
sampleStart = 0;
|
|
|
|
sampleWidth = (sample.col + halfSample >= canvasWidth) ?
|
|
(sample.col - canvasWidth + sampleWidthBase) : sampleWidthBase;
|
|
|
|
// sample.top - 1 -> should be black (we assume a bit of margin in case of rough edges)
|
|
// sample.top + 2 -> should be color
|
|
// we must also check for negative values, which mean something went wrong.
|
|
if(sample.top > 1){
|
|
// check whether black edge gets any non-black values. non-black -> insta fail
|
|
imageData = context.getImageData(sampleStart, sample.top - 1, sampleWidth, 1).data;
|
|
|
|
for(var i = 0; i < imageData.length; i+= 4){
|
|
if (imageData[i] > blackbarTreshold ||
|
|
imageData[i+1] > blackbarTreshold ||
|
|
imageData[i+2] > blackbarTreshold ){
|
|
blackEdgeViolation = true;
|
|
|
|
if(Debug.debug && Debug.debugArDetect && Debug.arDetect.edgeDetect)
|
|
console.log(("[ArDetect::_ard_edgeDetect] detected black edge violation at i="+i+"; sample.top="+sample.top + "\n--")/*, imageData, context.getImageData(sampleStart, sample.top - 2, sampleWidth, 1)*/);
|
|
|
|
break;
|
|
}
|
|
}
|
|
// if black edge isn't black, we don't check the image part either
|
|
if(!blackEdgeViolation){
|
|
imageData = context.getImageData(sampleStart, sample.top + 2, sampleWidth, 1).data;
|
|
detections = 0;
|
|
|
|
for(var i = 0; i < imageData.length; i+= 4){
|
|
if (imageData[i] > blackbarTreshold ||
|
|
imageData[i+1] > blackbarTreshold ||
|
|
imageData[i+2] > blackbarTreshold ){
|
|
detections++;
|
|
}
|
|
}
|
|
|
|
console.log("detections:",detections, imageData, context.getImageData(sampleStart, sample.top - 2, sampleWidth, 1));
|
|
|
|
if(detections >= detectionTreshold){
|
|
console.log("detection!");
|
|
|
|
if(edgeCandidatesTop[sample.top] != undefined)
|
|
edgeCandidatesTop[sample.top].count++;
|
|
else{
|
|
topEdgeCount++; // only count distinct
|
|
edgeCandidatesTop[sample.top] = {top: sample.top, count: 1};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// sample.bottom -> should be black
|
|
// sample.bottom-2 -> should be non-black
|
|
if(sample.bottom > 0){
|
|
imageData = context.getImageData(sampleStart, sample.bottom, sampleWidth, 1).data;
|
|
|
|
for(var i = 0; i < imageData.length; i+= 4){
|
|
if (imageData[i] > blackbarTreshold ||
|
|
imageData[i+1] > blackbarTreshold ||
|
|
imageData[i+2] > blackbarTreshold ){
|
|
blackEdgeViolation = true;
|
|
console.log(("[ArDetect::_ard_edgeDetect] detected black edge violation at i="+i+"; sample.top="+sample.top + "\n--")/*, imageData, context.getImageData(sampleStart, sample.top - 2, sampleWidth, 1)*/);
|
|
|
|
break;
|
|
}
|
|
}
|
|
// if black edge isn't black, we don't check the image part either
|
|
if(!blackEdgeViolation){
|
|
imageData = context.getImageData(sampleStart, sample.bottom - 2, sampleWidth, 1).data;
|
|
detections = 0;
|
|
|
|
for(var i = 0; i < imageData.length; i+= 4){
|
|
if (imageData[i] > blackbarTreshold ||
|
|
imageData[i+1] > blackbarTreshold ||
|
|
imageData[i+2] > blackbarTreshold ){
|
|
detections++;
|
|
}
|
|
}
|
|
|
|
if(detections >= detectionTreshold){
|
|
// use bottomRelative for ez sort
|
|
|
|
console.log("detection!");
|
|
|
|
if(edgeCandidatesBottom[sample.bottomRelative] != undefined)
|
|
edgeCandidatesBottom[sample.bottomRelative].count++;
|
|
else{
|
|
bottomEdgeCount++; // only count distinct edges
|
|
edgeCandidatesBottom[sample.bottomRelative] = {bottom: sample.bottom, bottomRelative: sample.bottomRelative, count: 1};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
edgeCandidatesTop: edgeCandidatesTop,
|
|
edgeCandidatesTopCount: topEdgeCount,
|
|
edgeCandidatesBottom: edgeCandidatesBottom,
|
|
edgeCandidatesBottomCount: bottomEdgeCount
|
|
};
|
|
}
|
|
|
|
function _ard_edgePostprocess(edges, canvasHeight){
|
|
var edgesTop = [];
|
|
var edgesBottom = [];
|
|
var alignMargin = canvasHeight * Settings.arDetect.allowedMisaligned;
|
|
|
|
var missingEdge = edges.edgeCandidatesTopCount == 0 || edges.edgeCandidatesBottomCount == 0;
|
|
|
|
// pretvorimo objekt v tabelo
|
|
// convert objects to array
|
|
|
|
console.log(edges.edgeCandidatesTop);
|
|
|
|
if( edges.edgeCandidatesTopCount > 0){
|
|
for(var e in edges.edgeCandidatesTop){
|
|
var edge = edges.edgeCandidatesTop[e];
|
|
edgesTop.push({distance: edge.top, count: edge.count});
|
|
}
|
|
}
|
|
|
|
if( edges.edgeCandidatesBottomCount > 0){
|
|
for(var e in edges.edgeCandidatesBottom){
|
|
var edge = edges.edgeCandidatesBottom[e];
|
|
edgesBottom.push({distance: edge.bottomRelative, absolute: edge.bottom, count: edge.count});
|
|
}
|
|
}
|
|
|
|
console.log("count top:",edges.edgeCandidatesTopCount, "edges:", edges, "edgesTop[]", edgesTop);
|
|
|
|
// če za vsako stran (zgoraj in spodaj) poznamo vsaj enega kandidata, potem lahko preverimo nekaj
|
|
// stvari
|
|
|
|
if(! missingEdge ){
|
|
// predvidevamo, da je logo zgoraj ali spodaj, nikakor pa ne na obeh straneh hkrati.
|
|
// če kanal logotipa/watermarka ni vključil v video, potem si bosta razdaliji (edge.distance) prvih ključev
|
|
// zgornjega in spodnjega roba približno enaki
|
|
//
|
|
// we'll assume that no youtube channel is rude enough to put channel logo/watermark both on top and the bottom
|
|
// of the video. If logo's not included in the video, distances (edge.distance) of the first two keys should be
|
|
// roughly equal. Let's check for that.
|
|
if( edgesTop[0].distance >= edgesBottom[0].distance - alignMargin &&
|
|
edgesTop[0].distance <= edgesBottom[0].distance + alignMargin ){
|
|
|
|
var blackbarWidth = edgesTop[0].distance > edgesBottom[0].distance ?
|
|
edgesTop[0].distance : edgesBottom[0].distance;
|
|
|
|
return {status: "ar_known", blackbarWidth: blackbarWidth, guardLineTop: edgesTop[0].distance, guardLineBottom: edgesBottom[0].absolute };
|
|
}
|
|
|
|
// torej, lahko da je na sliki watermark. Lahko, da je slika samo ornh črna. Najprej preverimo za watermark
|
|
// it could be watermark. It could be a dark frame. Let's check for watermark first.
|
|
if( edgesTop[0].distance < edgesBottom[0].distance &&
|
|
edgesTop[0].count < edgesBottom[0].count &&
|
|
edgesTop[0].count < GlobalVars.arDetect.sampleCols * Settings.arDetect.edgeDetection.logoTreshold){
|
|
// možno, da je watermark zgoraj. Preverimo, če se kateri od drugih potencialnih robov na zgornjem robu
|
|
// ujema s prvim spodnjim (+/- variance). Če je temu tako, potem bo verjetno watermark. Logo mora imeti
|
|
// manj vzorcev kot navaden rob.
|
|
|
|
if(edgesTop[0].length > 1){
|
|
var lowMargin = edgesBottom[0].distance - alignMargin;
|
|
var highMargin = edgesBottom[0].distance + alignMargin;
|
|
|
|
for(var i = 1; i < edgesTop.length; i++){
|
|
if(edgesTop[i].distance >= lowMargin && edgesTop[i].distance <= highMargin){
|
|
// dobili smo dejanski rob. vrnimo ga
|
|
// we found the actual edge. let's return that.
|
|
var blackbarWidth = edgesTop[i].distance > edgesBottom[0].distance ?
|
|
edgesTop[i].distance : edgesBottom[0].distance;
|
|
|
|
return {status: "ar_known", blackbarWidth: blackbarWidth, guardLineTop: edgesTop[i].distance, guardLineBottom: edgesBottom[0].absolute};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if( edgesBottom[0].distance < edgesTop[0].distance &&
|
|
edgesBottom[0].count < edgesTop[0].count &&
|
|
edgesBottom[0].count < GlobalVars.arDetect.sampleCols * Settings.arDetect.edgeDetection.logoTreshold){
|
|
|
|
if(edgesBottom[0].length > 1){
|
|
var lowMargin = edgesTop[0].distance - alignMargin;
|
|
var highMargin = edgesTop[0].distance + alignMargin;
|
|
|
|
for(var i = 1; i < edgesBottom.length; i++){
|
|
if(edgesBottom[i].distance >= lowMargin && edgesTop[i].distance <= highMargin){
|
|
// dobili smo dejanski rob. vrnimo ga
|
|
// we found the actual edge. let's return that.
|
|
var blackbarWidth = edgesBottom[i].distance > edgesTop[0].distance ?
|
|
edgesBottom[i].distance : edgesTop[0].distance;
|
|
|
|
return {status: "ar_known", blackbarWidth: blackbarWidth, guardLineTop: edgesTop[0].distance, guardLineBottom: edgesBottom[0].absolute};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else{
|
|
// zgornjega ali spodnjega roba nismo zaznali. Imamo še en trik, s katerim lahko poskusimo
|
|
// določiti razmerje stranic
|
|
// either the top or the bottom edge remains undetected, but we have one more trick that we
|
|
// can try. It also tries to work around logos.
|
|
|
|
var edgeDetectionTreshold = GlobalVars.arDetect.sampleCols * Settings.arDetect.edgeDetection.singleSideConfirmationTreshold;
|
|
|
|
if(edges.edgeCandidatesTopCount == 0 && edges.edgeCandidatesBottomCount != 0){
|
|
for(var edge of edgesBottom){
|
|
if(edge.count >= edgeDetectionTreshold)
|
|
return {status: "ar_known", blackbarWidth: edge.distance, guardLineTop: null, guardLineBottom: edge.bottom}
|
|
}
|
|
}
|
|
if(edges.edgeCandidatesTopCount != 0 && edges.edgeCandidatesBottomCount == 0){
|
|
for(var edge of edgesTop){
|
|
if(edge.count >= edgeDetectionTreshold)
|
|
return {status: "ar_known", blackbarWidth: edge.distance, guardLineTop: edge.top, guardLineBottom: null}
|
|
}
|
|
}
|
|
}
|
|
// če pridemo do sem, nam ni uspelo nič. Razmerje stranic ni znano
|
|
// if we reach this bit, we have failed in determining aspect ratio. It remains unknown.
|
|
return {status: "ar_unknown"}
|
|
}
|
|
|
|
var _ard_stop = function(){
|
|
if(Debug.debug){
|
|
console.log("%c[ArDetect::_ard_stop] Stopping automatic aspect ratio detection", _ard_console_stop);
|
|
}
|
|
this._forcehalt = true;
|
|
this._halted = true;
|
|
clearTimeout(_ard_timer);
|
|
clearTimeout(_ard_setup_timer);
|
|
}
|
|
|
|
var _ard_resetBlackLevel = function(){
|
|
GlobalVars.arDetect.blackLevel = Settings.arDetect.blackLevel_default;
|
|
}
|
|
|
|
var _ard_isRunning = function(){
|
|
return ! this._halted;
|
|
}
|
|
|
|
function _ard_getTimeout(baseTimeout, startTime){
|
|
baseTimeout -= (performance.now() - startTime);
|
|
|
|
return baseTimeout > Settings.arDetect.minimumTimeout ? baseTimeout : Settings.arDetect.minimumTimeout;
|
|
}
|
|
|
|
var ArDetect = {
|
|
_forcehalt: false,
|
|
_halted: false,
|
|
arSetup: _arSetup,
|
|
init: _arSetup,
|
|
vdraw: _ard_vdraw,
|
|
detectedAr: 1,
|
|
arChangedCallback: function() {},
|
|
stop: _ard_stop,
|
|
isRunning: _ard_isRunning,
|
|
resetBlackLevel: _ard_resetBlackLevel
|
|
}
|