padmaJS/padma.layers.js

var padmaConfig = {
  'background': 'rgba(0,0,0,0.85)',
  'color': '#fff',
  'links_url': 'pad.ma/',
  'data_url': 'http://pad.ma/',
  'default_layers': ['transcript', 'description'],
};

(function($) {

var BASE_URL = padmaConfig.data_url;

var padmaVideo = function(videoId) {
  this.id = videoId;
  this.videoUrl = BASE_URL + videoId + "/video.js";
  this.layersUrl = BASE_URL + videoId + "/layers.js";
  this.infoUrl = BASE_URL + videoId + "/info";
  this.hasVideoData = false;
  this.hasLayersData = false;
  this.hasAllData = false;
  this.video = {};
  this.layers = {};
  var that = this;
  padmaVideo.cache.push(that); 
}

padmaVideo.prototype.getAllData = function(callback, data) {
  var that = this;
  if (!this.hasAllData) {
    $.getScript(that.videoUrl, function() {
      that.video = video;
      that.hasVideoData = true;
      $.getScript(that.layersUrl, function() {
        that.layers = layers;
        that.hasLayersData = true;
        that.hasAllData = true;
        callback(that, data);
      });
    });
  } else {
    callback(that, data);
  }
}

//tc in npt
padmaVideo.prototype.getFrame = function(tc, size) {
  if (typeof(size) == 'undefined') {
    sizeStr = '';
  } else {
    sizeStr = '.' + size;
  }
  return BASE_URL + this.id + "/frame/" + tc + sizeStr + ".jpg";
}

padmaVideo.prototype.getPoster = function() {
    return this.getFrame(ms2npt(this.video.poster_frame), '320');
}

//tc in npt
padmaVideo.prototype.getVideo = function(tc, size) {
  if (!this.hasVideoData) {
    return false;
  }
  if (typeof(size) == 'undefined') {
    size = '128';
  }
  return this.video.urls[size] + "?t=npt:" + tc;   
}


padmaVideo.prototype.getDownloadLink = function(tcIn, tcOut) {
  return BASE_URL + this.id + "/download/" + tcIn + "-" + tcOut + ".ogv";  
}


padmaVideo.prototype.getLayerVideo = function(tcIn, tcOut) {
  return this.video.urls['320'] + "?t=" + tcIn + "/" + tcOut;
}

padmaVideo.prototype.noop = function() {
//  console.log("I'm done:)");
  $.noop();
}

padmaVideo.prototype.getVideoData = function(callback, data) {
  var that = this;
  if (this.hasVideoData) {
    callback(that, data);
  } else {
    $.getScript(that.videoUrl, function() {
      that.video = video;
      that.hasVideoData = true;
      callback(that, data);
    });
  }
}

padmaVideo.prototype.getLayersData = function(callback, data) {
  var that = this;
  if (this.hasLayersData) {
    callback(that, data);
  } else {
    $.getScript(that.layersUrl, function() {
      that.layers = layers;
      that.hasLayersData = true;
      callback(that, data);
    });
  }
}

padmaVideo.prototype.getLayerById = function(id) {
  var that = this;
  if (!this.hasLayersData) {
    return false;  
  }
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
    if (thisLayer.id == id) {
      return thisLayer;
    }
  }
  return null;     
}

//timecode in ms
padmaVideo.prototype.getLayersAtTimecode = function(tc) {
  var that = this;
  if (!this.hasLayersData) {
    return false;
  }
//  console.log(tc);
  var layers = [];
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
    if (tc > thisLayer.time_in && tc < thisLayer.time_out) {
      layers.push(thisLayer);
    }
  }
  return layers;
}

padmaVideo.prototype.getLayerById = function(id) {
  var that = this;
  var id = $.trim(id);
  for (var i=0; i < that.layers.length; i++) {
    var thisLayer = that.layers[i];
    if (thisLayer.id == id) {
      return thisLayer;
    } 
  }
  return false;
}

function filterLayersByTracks(layers, tracks) {
  var matchedLayers = [] 
  for (var i=0; i < layers.length; i++) {
    var layer = layers[i];
//    console.log(layer.track);
    if ($.inArray(layer.track, tracks) != -1) {
      matchedLayers.push(layer);
    }   
  }
  return matchedLayers;  
}

function filterLayersByContributors(layers, users) {
  var matchedLayers = [];
  for (var i=0; i < layers.length; i++) {
    var layer = layers[i];
    if ($.inArray(layer.contributor, users)) {
      matchedLayers.push(layer);
    }
  }
  return matchedLayers;
}

padmaVideo.cache = [];

padmaVideo.getFromCache = function(videoId) {
  var cache = padmaVideo.cache;
  for (var i=0; i<cache.length; i++) {
    var v = cache[i];
    if (v.id === videoId) {
      return v;
    }
  }
  return false;
}

window.padmaVideo = padmaVideo;
window.filterLayersByTracks = filterLayersByTracks;
window.filterLayersByContributors = filterLayersByContributors;

function ms2npt(pos) {
    var h = Math.floor(pos / 3600000);
    var m = Math.floor(pos % 3600000 / 60000);
    var s = Math.floor(pos % 60000 / 1000);
    var ms = pos % 1000;
    return h.toString().pad('0', 2) + ':' + m.toString().pad('0', 2) + ':' + s.toString().pad('0', 2) + '.' + ms.toString().pad('0', 3);
    // return strpad(h.toString(), '0', 2, 'left') + ':' + strpad(m.toString(), '0', 2, 'left') + ':' + strpad(s.toString(), '0', 2, 'left') + '.' + strpad(ms.toString(), '0', 3, 'left');
}

function npt2ms(npt) {
  var ms = 0.0;
  var p = npt.split(':');
  for (i=0; i<p.length; i++) {
    ms = ms * 60 + parseFloat(p[i]);
  }
  return ms * 1000;
}


String.prototype.pad = function(pad, len, dir) {
    if (typeof(dir) == 'undefined')
        dir = 'left';
    var str = this;
    while (str.length < len) {
        if (dir == 'left')
            str = pad + str;
        else if (dir == 'right')
            str = str + pad;
    }
    return str;
}



})(jQuery);