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// Include this file along with the dash.js player to enable logging
// The log output will be parsed by Flent
var player;
var tmp_date;
var starttime;
var off = 1;
var stoptime;
var stalling=0;
var first_log = 1;
var log_base;
function time_log(Type,D1,D2,D3) {
var tmp_d = new Date();
if (first_log) {
log_base = tmp_d.getTime();
first_log = 0;
}
var t_stamp = tmp_d.getTime() - log_base;
// D,time,type,d1,d2,d3
console.log("D," + t_stamp + "," + Type + "," + D1 + "," + D2 + "," + D3);
}
function showEvent(e) {
// we can now play, either after initial loading or stalling
if (e.type == "canPlay") {
if (off) {
off = 0;
tmp_date = new Date();
var start_elapsed = tmp_date.getTime() - starttime;
var q_idx = player.getQualityFor('video');
var q_obj = player.getBitrateInfoListFor('video')[q_idx];
var bitrate = q_obj.bitrate;
time_log("ID",start_elapsed,null,null);
time_log("IR",bitrate,null,null);
} else {
if (stalling) {
tmp_date = new Date();
var stop_elapsed = tmp_date.getTime() - stoptime;
time_log("SD",stop_elapsed,null,null);
stalling=0;
}
}
}
// we have now run out of buffer space, begin stall period
if (e.type == "bufferStalled" && e.mediaType == "video") {
stalling=1;
stoptime = new Date();
}
// we have a quality change!
if (e.type == "qualityChangeRequested" && e.mediaType == "video") {
var q_idx = player.getQualityFor('video');
var q_obj = player.getBitrateInfoListFor('video')[q_idx];
if (e.reason != undefined)
time_log("QC",e.oldQuality,e.newQuality,e.reason.name);
else
time_log("QC",e.oldQuality,e.newQuality,null);
time_log("BC",q_obj.bitrate);
}
if (e.type == "playbackProgress") {
time_log("AT", player.getAverageThroughput('video'),null,null);
time_log("BL", player.getBufferLength('video')*1000,null,null);
}
if (e.type == "fragmentLoadingCompleted" && e.request.mediaType == 'video') {
let now = new Date().getTime();
time_log("FC",(now-e.request.delayLoadingTime),null,null);
}
}
function init()
{
player = dashjs.MediaPlayerFactory.create(document.querySelector(".dashjs-player"));
player.getDebug().setLogTimestampVisible(true);
player.getDebug().setLogToBrowserConsole(false);
// save start time
tmp_date = new Date();
starttime = tmp_date.getTime();
// events to listen for
player.on(dashjs.MediaPlayer.events["CAN_PLAY"], showEvent);
player.on(dashjs.MediaPlayer.events["BUFFER_EMPTY"], showEvent);
player.on(dashjs.MediaPlayer.events["QUALITY_CHANGE_REQUESTED"], showEvent);
player.on(dashjs.MediaPlayer.events["FRAGMENT_LOADING_COMPLETED"], showEvent);
player.on(dashjs.MediaPlayer.events["PLAYBACK_PROGRESS"], showEvent);
}
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