window.onload
事件似乎在媒體src
完全加載之前調用。使用在How do you check if a HTML5 audio element is loaded?中描述的方法;和包括.webkitAudioDecodedByteCount
<!DOCTYPE html>
<html>
<head>
<script>
window.addEventListener("load", function() {
var media = document.querySelector("audio");
console.log("window onload event"
, media.webkitAudioDecodedByteCount
, media.readyState)
})
function myOnCanPlayFunction() {
console.log("Can play", event.target.webkitAudioDecodedByteCount
, event.target.seekable.start(0)
, event.target.seekable.end(0));
}
function myOnCanPlayThroughFunction() {
console.log("Can play through", event.target.webkitAudioDecodedByteCount
, event.target.seekable.start(0)
, event.target.seekable.end(0));
}
function myOnLoadedData() {
console.log("Loaded data", event.target.webkitAudioDecodedByteCount
, event.target.seekable.start(0)
, event.target.seekable.end(0));
}
</script>
</head>
<body>
<audio oncanplay="myOnCanPlayFunction()"
oncanplaythrough="myOnCanPlayThroughFunction()"
onloadeddata="myOnLoadedData()"
src="/path/to/audio/file"
preload autoplay buffered controls></audio>
</body>
</html>
plnkr版本1 http://plnkr.co/edit/zIIDDLZeVU7NHdfAtFka?p=preview
使用XMLHttpRequest
的另一種方法,onended
事件的AudioContext
; Promise
;遞歸請求,按順序播放文件數組。見AudioContext.decodeAudioData()
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">
<script>
var sources = ["/path/to/audio/src/1"
, "/path/to/audio/src/2"];
var src = sources.slice(0); // copy original array
function getAudio(url) {
return new Promise(function(resolve, reject) {
var audioCtx = new(window.AudioContext || window.webkitAudioContext)();
var source = audioCtx.createBufferSource();
var request = new XMLHttpRequest();
request.open("GET", url, true);
request.responseType = "arraybuffer";
request.onload = function() {
var audioData = request.response;
audioCtx.decodeAudioData(audioData).then(function(decodedData) {
source.buffer = decodedData;
source.connect(audioCtx.destination);
console.log(source, decodedData);
// do stuff when current audio has ended
source.onended = function() {
console.log("onended:", url);
if (src.length)
resolve(src)
else resolve("complete")
}
source.start(0);
});
}
request.send();
})
}
var audio = (function tracks(s) {
return getAudio(s.shift())
.then(function(data) {
if (Array.isArray(data) && data.length) return tracks(data)
else return data
})
}(src));
// do stuff when all `src` have been requested, played, ended
audio.then(function(msg) {
console.log(msg)
})
</script>
</head>
<body>
</body>
</html>
plnkr版本2 http://plnkr.co/edit/zIIDDLZeVU7NHdfAtFka?p=preview
你試過審查'Timing'在'Network'標籤? ,將'
我有,但是我現在很小的音頻文件裝載速度如此之快,我無法破譯 – Dexter
'data URI'會將'