| Index: tracing/tracing/metrics/media_metric.html
|
| diff --git a/tracing/tracing/metrics/media_metric.html b/tracing/tracing/metrics/media_metric.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..0b6e74061e8a05ce97144187611fffacd39244cf
|
| --- /dev/null
|
| +++ b/tracing/tracing/metrics/media_metric.html
|
| @@ -0,0 +1,91 @@
|
| +<!DOCTYPE html>
|
| +<!--
|
| +Copyright 2017 The Chromium Authors. All rights reserved.
|
| +Use of this source code is governed by a BSD-style license that can be
|
| +found in the LICENSE file.
|
| +-->
|
| +
|
| +<link rel="import" href="/tracing/metrics/metric_registry.html">
|
| +<link rel="import" href="/tracing/value/histogram.html">
|
| +
|
| +<script>
|
| +'use strict';
|
| +
|
| +tr.exportTo('tr.metrics', function() {
|
| + function mediaMetric(histograms, model) {
|
| + let playStart;
|
| + let timeToPlay;
|
| + let playEnd;
|
| + let duration;
|
| +
|
| + const seekStarts = [];
|
| + const seekEnds = [];
|
| + const seekLabels = [];
|
| +
|
| + for (const event of model.getDescendantEvents()) {
|
| + if (!event.title) {
|
| + continue;
|
| + }
|
| + if (event.title.startsWith('seekLabel-')) {
|
| + seekLabels.push(event);
|
| + } else if (event.title.startsWith('duration-')) {
|
| + duration = Number(event.title.substring(9));
|
| + } else if (event.title === 'EventDispatch') {
|
| + const type = event.args.data.type;
|
| + if (type === 'willPlay') {
|
| + playStart = event.start;
|
| + } else if (type === 'play' || type === 'loadedmetadata') {
|
| + if (playStart === undefined) {
|
| + playStart = event.start;
|
| + }
|
| + } else if (type === 'playing') {
|
| + if (playStart !== undefined && timeToPlay === undefined) {
|
| + timeToPlay = event.start - playStart;
|
| + addTimeValue(histograms, 'time_to_play', timeToPlay);
|
| + }
|
| + } else if (type === 'ended') {
|
| + playEnd = event.start;
|
| + } else if (type === 'willSeek') {
|
| + seekStarts.push(event.start);
|
| + } else if (type === 'seeked') {
|
| + seekEnds[seekStarts.length - 1] = event.start;
|
| + }
|
| + }
|
| + }
|
| +
|
| + if (playStart !== undefined && timeToPlay !== undefined &&
|
| + playEnd !== undefined && duration !== undefined) {
|
| + addTimeValue(histograms, 'buffering_time',
|
| + playEnd - playStart - timeToPlay - 1000 * duration);
|
| + }
|
| +
|
| + for (let i = 0; i < seekStarts.length; i++) {
|
| + if (seekEnds[i] === undefined) {
|
| + continue;
|
| + }
|
| + let name = 'seek';
|
| + for (const seekLabel of seekLabels) {
|
| + const time = seekLabel.start;
|
| + if (time >= seekStarts[i] && time <= seekEnds[i]) {
|
| + name = seekLabel.title.substring(10);
|
| + break;
|
| + }
|
| + }
|
| + addTimeValue(histograms, name, seekEnds[i] - seekStarts[i]);
|
| + }
|
| + }
|
| +
|
| + function addTimeValue(histograms, name, value) {
|
| + const hist = new tr.v.Histogram(name,
|
| + tr.b.Unit.byName.timeDurationInMs_smallerIsBetter);
|
| + hist.addSample(value);
|
| + histograms.addHistogram(hist);
|
| + }
|
| +
|
| + tr.metrics.MetricRegistry.register(mediaMetric);
|
| +
|
| + return {
|
| + mediaMetric,
|
| + };
|
| +});
|
| +</script>
|
|
|
Chromium Code Reviews
Issue 3002623002:
[WIP] Port media metrics to TBMv2 (Closed)
