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Merge pull request #9925 from Snuffleupagus/StreamsSequenceStream-maybeLength

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Attempt to estimate the minimum required `buffer` length when initializing `StreamsSequenceStream` instances
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Tim van der Meij 2018-07-29 16:52:34 +02:00 committed by GitHub
commit a2c317f12b
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1 changed files with 13 additions and 1 deletions
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14
src/core/stream.js
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@ -126,6 +126,8 @@ var DecodeStream = (function DecodeStreamClosure() {
var emptyBuffer = new Uint8Array(0); var emptyBuffer = new Uint8Array(0);
function DecodeStream(maybeMinBufferLength) { function DecodeStream(maybeMinBufferLength) {
this._rawMinBufferLength = maybeMinBufferLength || 0;
this.pos = 0; this.pos = 0;
this.bufferLength = 0; this.bufferLength = 0;
this.eof = false; this.eof = false;
@ -251,7 +253,17 @@ var DecodeStream = (function DecodeStreamClosure() {
var StreamsSequenceStream = (function StreamsSequenceStreamClosure() { var StreamsSequenceStream = (function StreamsSequenceStreamClosure() {
function StreamsSequenceStream(streams) { function StreamsSequenceStream(streams) {
this.streams = streams; this.streams = streams;
DecodeStream.call(this, /* maybeLength = */ null);
let maybeLength = 0;
for (let i = 0, ii = streams.length; i < ii; i++) {
const stream = streams[i];
if (stream instanceof DecodeStream) {
maybeLength += stream._rawMinBufferLength;
} else {
maybeLength += stream.length;
}
}
DecodeStream.call(this, maybeLength);
} }
StreamsSequenceStream.prototype = Object.create(DecodeStream.prototype); StreamsSequenceStream.prototype = Object.create(DecodeStream.prototype);