chrome/test/data/media/html/media_seek.html

   1 <!-- Used by media_seek_perf to record seek perf metrics. -->
   2 <!DOCTYPE html>
   3 <html lang="en-US">
   4   <head>
   5     <title>CNS Seek Tests</title>
   6      <script src="utils.js" type="text/javascript"></script>
   7   </head>
   8
   9   <body>
  10     <video controls></video>
  11     <div></div>
  12   </body>
  13
  14   <script type="text/javascript">
  15     var video = document.querySelector("video");
  16     var logDiv = document.querySelector("div");
  17     var ITERATIONS = 3;
  18
  19     var SeekTestCase = {
  20       SHORT: 0,
  21       LONG: 1
  22     }
  23
  24     var CachedState = {
  25       UNCACHED: 0,
  26       CACHED: 1
  27     }
  28
  29     function log(text) {
  30       logDiv.innerText += text + "\n";
  31     }
  32
  33     function resetSeekRecords() {
  34       seekRecords = [];
  35       for (cache_index in Object.keys(CachedState)) {
  36         seekRecords[cache_index] = [];
  37         for (seek_index in Object.keys(SeekTestCase)) {
  38            seekRecords[cache_index][seek_index] = [];
  39         }
  40       }
  41     }
  42
  43     // Called by the PyAuto controller to initiate testing.
  44     function startTest(src) {
  45       if (window.domAutomationController)
  46         window.domAutomationController.send(true);
  47
  48       resetSeekRecords();
  49       endTest = false;
  50       errorMsg = "";
  51       timer = new Timer();
  52
  53       video.addEventListener("playing", playing);
  54       video.addEventListener("seeked",  seeked);
  55       video.addEventListener("error", error);
  56       originalSrc = src;
  57       log("Running tests on " + originalSrc);
  58       log("Starting seek tests without browser caching:");
  59       cacheState = CachedState.UNCACHED;
  60       iteration = 0;
  61       IterationTest();
  62     }
  63
  64     function IterationTest() {
  65       if (iteration < ITERATIONS) {
  66         iteration++;
  67         log("Test iteration " + iteration);
  68         seekState = SeekTestCase.SHORT;
  69         video.src = getVideoSrc();
  70         video.play();
  71       } else if (cacheState == CachedState.UNCACHED) {
  72         log("Starting seek tests with browser caching:");
  73         cacheState = CachedState.CACHED;
  74         iteration = 0;
  75         IterationTest();
  76       } else {
  77         endTest = true;
  78       }
  79     }
  80
  81     function getVideoSrc() {
  82       if (cacheState == CachedState.UNCACHED) {
  83         return GenerateUniqueURL(originalSrc);
  84       } else {
  85         return video.src;
  86       }
  87     }
  88
  89     function playing() {
  90       if (seekState == SeekTestCase.SHORT) {
  91         timer.start();
  92         video.currentTime = 1;
  93       }
  94     }
  95
  96     function seeked() {
  97       delta = timer.stop();
  98       switch (seekState) {
  99         case SeekTestCase.SHORT:
 100           seekRecords[cacheState][SeekTestCase.SHORT].push(delta);
 101           log ("short seek in " + delta + "ms.")
 102           seekState = SeekTestCase.LONG;
 103           timer.start();
 104           video.currentTime = video.duration - 1;
 105           break;
 106         // Seek to almost end of file (unbuffered area).
 107         case SeekTestCase.LONG:
 108           seekRecords[cacheState][SeekTestCase.LONG].push(delta);
 109           log("long seek in " + delta + "ms.")
 110           IterationTest();
 111           break;
 112         default:
 113           end("An un-expected seek occured.");
 114       }
 115     }
 116
 117     function end(msg) {
 118       errorMsg = msg;
 119       endTest = true;
 120       log(msg);
 121     }
 122
 123     function error(evt) {
 124       end("Error loading media: " + evt.target + " " + evt.type + " " +
 125           video.error.code);
 126     }
 127   </script>
 128 </html>