TPU SOUND PROJECT

1. Introduction
2. HW requirements
3. SW requirements
4. UPnP services used
5. The UPnP control point
6. The UPnP media renderer (smart speaker)
7. The user interface

TPU-Sound Project

The user interface - Dynamic part - The eventing.js file

The "eventing.js" file is a more complex file than the "index.js" file and herein we can find function divided in five main classes:

• Timing functions;
• Infos screen updater;
• Binding section;
• Volume bar bound events;
• Seek bar bound events

There is even another section, called "default eventing manage parameters" which consists in a group of parameter definitions : base url for CGI scripts launch, common gateway interface (CGI) scripts, interface DOM elements involved, utility variables.

Let's start with the description of the functions in the various classes:

Timing functions:

• function count2time(counter, withoutHours):

  this function converts a counter into a time. It means that the function receives as input a number expressed in second cents and it gives as output two possible format:

  • mm:ss:00, that is the default format;
  • hh:mm:ss, that is the alternative format which is used when the duration time of the file is bigger on equal than one hour.

• function time2count(timestamp):

  this function carry out the opposite work with respect to the previous one, it means that it converts the timestamp value into a counter (number of second cents).

  So, in this case the inputs is given by one of the two formats mm:ss:00 or hh:mm:ss and the output is a number;

• function incrementTime(max_time, start_counter):

  This function is used to update the timing display for the running track each second; the inputs are the total duration of the song (max_time) and the start counter;

• function getTimeDisplay(isSeeked):

  with this function we obtain the actual time display and we update the timing infos on the display. It is useful in case of manual seek on the time bar.