test_NoAudioLoopBackData_Muted.html (3309B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>MSE: loop-back data not available yet (shorter MUTED audio)</title> 5 <script src="/tests/SimpleTest/SimpleTest.js"></script> 6 <script type="text/javascript" src="mediasource.js"></script> 7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> 8 </head> 9 <body> 10 <script class="testbody" type="text/javascript"> 11 12 /** 13 * This test is used to check whether a looping video can loop back successfully 14 * when it has a shorter MUTED audio track than its video track. When reaching 15 * EOS for the shorter track, there is no loop-back data at the start position 16 * (they are not appended yet) Even that, we should still be able to loop back 17 * but the looping would become non-seamless in this situation. 18 */ 19 SimpleTest.waitForExplicitFinish(); 20 21 runWithMSE(async (ms, el) => { 22 await once(ms, "sourceopen"); 23 ok(true, "Receive a sourceopen event"); 24 const videosb = ms.addSourceBuffer("video/mp4"); 25 const audiosb = ms.addSourceBuffer("audio/mp4"); 26 27 // Here we create a shorter audio than video. 28 info(`create different length source buffers`); 29 await fetchAndLoad(videosb, "bipbop/bipbop_video", ["init"], ".mp4"); 30 await fetchAndLoad(videosb, "bipbop/bipbop_video", range(5, 8), ".m4s"); 31 audiosb.appendWindowEnd = videosb.buffered.end(0) - 0.2; 32 await fetchAndLoad(audiosb, "bipbop/bipbop_audio", ["init"], ".mp4"); 33 await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(5, 8), ".m4s"); 34 ms.endOfStream(); 35 await Promise.all([once(el, "durationchange"), once(ms, "sourceended")]); 36 info(`audio=[${audiosb.buffered.start(0)}-${audiosb.buffered.end(0)}], video=[${videosb.buffered.start(0)}-${videosb.buffered.end(0)}]`); 37 ok(true, `endOfStream completed, buffer=[${el.buffered.start(0)}, ${el.buffered.end(0)}]`); 38 ok(videosb.buffered.end(0) > audiosb.buffered.end(0), `video should be longer than audio`); 39 40 info(`seek to the position where buffered data exists`); 41 el.muted = true; 42 el.loop = true; 43 el.controls = true; 44 el.currentTime = el.buffered.start(0); 45 await el.play(); 46 47 info(`video should trigger seeking when reaching to the end`); 48 let seekingCount = 0, seekedCount = 0; 49 el.addEventListener("seeking", () => { 50 is(++seekingCount, 1, "should only receive seeking once!"); 51 }); 52 el.addEventListener("seeked", () => { 53 is(++seekedCount, 1, "should only receive seeked once!"); 54 }); 55 await once(el, "seeking"); 56 57 info(`trim old data before append new data`); 58 let p = Promise.all([once(videosb, "updateend"), once(audiosb, "updateend")]); 59 videosb.remove(videosb.buffered.start(0), videosb.buffered.end(0)); 60 audiosb.remove(audiosb.buffered.start(0), audiosb.buffered.end(0)); 61 await p; 62 63 info(`append new data`); 64 const seekedPromise = once(el, "seeked"); 65 p = Promise.all([once(videosb, "updateend"), once(audiosb, "updateend")]); 66 await fetchAndLoad(videosb, "bipbop/bipbop_video", range(1, 2), ".m4s"); 67 await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(1, 2), ".m4s"); 68 await p; 69 info(`audio=[${audiosb.buffered.start(0)}-${audiosb.buffered.end(0)}], video=[${videosb.buffered.start(0)}-${videosb.buffered.end(0)}]`); 70 71 info(`now we should be able to finish seeking to the start position`); 72 await seekedPromise; 73 74 SimpleTest.finish(SimpleTest); 75 }); 76 77 </script> 78 </body> 79 </html>