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PODoes recursion good in that case? (javascript/node.js)
 

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  1. PODoes recursion good in that case? (javascript/node.js)
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    <p>I m trying to make a TV from a raspberry pi, in javascript, the type who play the same playlist again and again. Playing the files aren t a problem, but I m stuck at the asynchronous part of javascript Here the code wich bother me:</p> <pre><code>function play (file) { exec('home/pi/play.sh', [file], function (error, stdout, stderr){ if (PIndice != Playlist.length-1){ PIndice=PIndice+1; }else{ PIndice=0; } play(Playlist[PIndice]); }); </code></pre> <p>Another function call it with Playlist[0] when I m sure there s a pathname in it.</p> <p>My question is: Is it safe? Isn t recursion will end up killing the cpu? I ve though about using setTimeOut but I didn t found any way to get the duration of the video.</p> <p>I ve tried calling play in a loop, but I just succeed at playing the whole playlist in the same time.</p> <p>I don t ask for a all-made solution, just hint to where I can find a way to do it properly Is there a way to wait for play to end before calling it again, even if javascript is asynchronous?</p> <p>EDIT: All files are in MPEG4, Playlist is just a array of string, wich contain the pathname of the video file to play. It s supposed to play without internet, so there s no browser, and I can t use html request to have the metadata of the video to get it duration.</p> <p>EDIT2: I forgot to tell that play.sh just start the player if there s no other instance of it, it is just a remain of the previous version where I didn t know about the callback of execFile</p>
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    1. COA little more detail would be helpful. What type of file are you playing? Is this in a browser? What type of playlist are you referring to?
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    2. COThe playlist is just a array of string, wich are the pathname of the file to play, all files are MPEG4. I don t use any browser, all files are already on the RPi
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