<!DOCTYPE HTML> <html> <head> <title>MSE: loop-back data not available yet (shorter video)</title> <script src="/tests/SimpleTest/SimpleTest.js"></script> <script type="text/javascript" src="mediasource.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <script class="testbody" type="text/javascript"> /** * This test is used to check whether a looping video can loop back successfully * when it has a shorter video track than its audio track. When reaching EOS for * the shorter track, there is no loop-back data at the start position (they are * not appended yet) Even that, we should still be able to loop back but the * looping would become non-seamless in this situation. */ SimpleTest.waitForExplicitFinish(); runWithMSE(async (ms, el) => { await once(ms, "sourceopen"); ok(true, "Receive a sourceopen event"); const videosb = ms.addSourceBuffer("video/mp4"); const audiosb = ms.addSourceBuffer("audio/mp4"); // Here we create a way shorter video than audio because audio decoding is // very fast. If two track only have small diffence in length, audio track // would still reach to the end first. But in this test, we want to test // reaching video EOS first. info(`create different length source buffers`); await fetchAndLoad(audiosb, "bipbop/bipbop_audio", ["init"], ".mp4"); await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(5, 8), ".m4s"); videosb.appendWindowEnd = audiosb.buffered.end(0) - 2.5; await fetchAndLoad(videosb, "bipbop/bipbop_video", ["init"], ".mp4"); await fetchAndLoad(videosb, "bipbop/bipbop_video", range(5, 8), ".m4s"); ms.endOfStream(); await Promise.all([once(el, "durationchange"), once(ms, "sourceended")]); info(`audio=[${audiosb.buffered.start(0)}-${audiosb.buffered.end(0)}], video=[${videosb.buffered.start(0)}-${videosb.buffered.end(0)}]`); ok(true, `endOfStream completed, buffer=[${el.buffered.start(0)}, ${el.buffered.end(0)}]`); ok(audiosb.buffered.end(0) > videosb.buffered.end(0), `audio should be longer than video`); info(`seek to the position where buffered data exists`); el.loop = true; el.controls = true; el.currentTime = el.buffered.start(0); await el.play(); info(`video should trigger seeking when reaching to the end`); let seekingCount = 0, seekedCount = 0; el.addEventListener("seeking", () => { is(++seekingCount, 1, "should only receive seeking once!"); }); el.addEventListener("seeked", () => { is(++seekedCount, 1, "should only receive seeked once!"); }); await once(el, "seeking"); info(`trim old data before append new data`); let p = Promise.all([once(videosb, "updateend"), once(audiosb, "updateend")]); videosb.remove(videosb.buffered.start(0), videosb.buffered.end(0)); audiosb.remove(audiosb.buffered.start(0), audiosb.buffered.end(0)); await p; info(`append new data`); const seekedPromise = once(el, "seeked"); p = Promise.all([once(videosb, "updateend"), once(audiosb, "updateend")]); await fetchAndLoad(videosb, "bipbop/bipbop_video", range(1, 2), ".m4s"); await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(1, 2), ".m4s"); await p; info(`audio=[${audiosb.buffered.start(0)}-${audiosb.buffered.end(0)}], video=[${videosb.buffered.start(0)}-${videosb.buffered.end(0)}]`); info(`now we should be able to finish seeking to the start position`); await seekedPromise; SimpleTest.finish(SimpleTest); }); </script> </body> </html>