test_fastSeek.html (3031B)
1 <!DOCTYPE HTML> 2 <html> 3 <!-- 4 https://bugzilla.mozilla.org/show_bug.cgi?id=778077 5 --> 6 <head> 7 <meta charset="utf-8"> 8 <title>Test for Bug 778077</title> 9 <script src="/tests/SimpleTest/SimpleTest.js"></script> 10 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> 11 <script type="text/javascript" src="manifest.js"></script> 12 </head> 13 <body> 14 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=778077">Mozilla Bug 778077</a> 15 <p id="display"></p> 16 <div id="content" style="display: none"> 17 18 </div> 19 <pre id="test"> 20 </pre> 21 <script type="application/javascript"> 22 23 /** Test for Bug 778077 - HTMLMediaElement.fastSeek() */ 24 // Iterate through a list of keyframe timestamps, and seek to 25 // halfway between the keyframe and the keyframe after it. 26 var manager = new MediaTestManager; 27 28 function doSeek(v) { 29 // fastSeek to half way between this keyframe and the next, or if this is the last 30 // keyframe seek to halfway between this keyframe and the end of media. 31 var nextKeyFrame = (v.keyframeIndex + 1) < v.keyframes.length ? v.keyframes[v.keyframeIndex + 1] : v.duration; 32 v.target = (v.keyframes[v.keyframeIndex] + nextKeyFrame) / 2; 33 v.fastSeek(v.target); 34 ok(Math.abs(v.currentTime - v.target) < 0.01, 35 v.name + " seekTo=" + v.target + " currentTime (" + v.currentTime + ") should be close to seek target initially"); 36 } 37 38 function onloadedmetadata(event) { 39 var v = event.target; 40 doSeek(v); 41 } 42 43 function onseeked(event) { 44 var v = event.target; 45 var keyframe = v.keyframes[v.keyframeIndex]; 46 47 // Check that the current time ended up roughly after the keyframe. 48 // We must be a bit fuzzy here, as the decoder backend may actually 49 // seek to the audio sample prior to the keyframe. 50 ok(v.currentTime >= keyframe - 0.05, 51 v.name + " seekTo=" + v.target + " currentTime (" + v.currentTime + 52 ") should be end up roughly after keyframe (" + keyframe + ") after fastSeek"); 53 54 ok(v.currentTime <= v.target, 55 v.name + " seekTo=" + v.target + " currentTime (" + v.currentTime + 56 ") should be end up less than target after fastSeek"); 57 58 v.keyframeIndex++ 59 if (v.keyframeIndex == v.keyframes.length) { 60 v.src = ""; 61 v.remove(); 62 manager.finished(v.token); 63 } else { 64 doSeek(v); 65 } 66 } 67 68 function startTest(test, token) { 69 manager.started(token); 70 let v = document.createElement("video"); 71 v.src = test.name; 72 v.name = test.name; 73 v.preload = "metadata"; 74 v.token = token; 75 v.target = 0; 76 v.keyframes = test.keyframes; 77 v.keyframeIndex = 0; 78 ok(v.keyframes.length, v.name + " - video should have at least one sync point"); 79 v.addEventListener("loadedmetadata", onloadedmetadata); 80 v.addEventListener("seeked", onseeked); 81 document.body.appendChild(v); 82 } 83 84 manager.runTests(gFastSeekTests, startTest); 85 86 </script> 87 </body> 88 </html>