LayoutTests/media/video-seek-by-small-increment.html

   1 <!DOCTYPE HTML>
   2 <html>
   3     <head>
   4         <script src=media-file.js></script>
   5         <script src=video-test.js></script>
   6
   7         <script>
   8             var seekedEventCount = 0;
   9             var increment = 0;
  10
  11             function seekIncrement()
  12             {
  13                 // We want to verify that seeking by an increment smaller than the test movie's time scale
  14                 // (the smallest unit of time in that file) succeeds. test.mp4 has a time scale of 2500,
  15                 // 0.0004 seconds, so start with that and decrease by half each time.
  16                 if (!increment)
  17                     increment = 0.0004;
  18                 else
  19                     increment /= 2;
  20                 return increment;
  21             }
  22
  23             function seeked()
  24             {
  25                 if (++seekedEventCount == 8) {
  26                     consoleWrite("");
  27                     endTest();
  28                     return;
  29                 }
  30                 attemptSeek();
  31             }
  32
  33             function attemptSeek()
  34             {
  35                 var increment = seekIncrement();
  36                 consoleWrite("<br>** Seeking by " + increment);
  37                 video.currentTime += increment;
  38             }
  39
  40             function start()
  41             {
  42                 findMediaElement();
  43                 video.src = findMediaFile("video", "content/test");
  44
  45                 waitForEvent('canplaythrough', attemptSeek);
  46                 waitForEvent('seeked', seeked);
  47                 waitForEvent('seeking');
  48                 waitForEvent('play');
  49                 waitForEvent('pause');
  50             }
  51         </script>
  52     </head>
  53     <body>
  54         <video controls></video>
  55         <p>Test seeking by very small increments.</p>
  56         <script>start()</script>
  57     </body>
  58 </html>