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Use JavascriptSubtitlesOctopus if canvas and web workers are available.

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This commit is contained in:
Andrew Mahone 2019-09-27 10:52:15 -04:00
parent c1d88b1540
commit 3f3e5e6da5
5 changed files with 62 additions and 6 deletions
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40
src/components/htmlvideoplayer/plugin.js
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@ -27,6 +27,14 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
return _supportsTextTracks;
}
function supportsCanvas() {
return !!document.createElement('canvas').getContext;
}
function supportsWebWorkers() {
return !!window.Worker;
}
function enableNativeTrackSupport(currentSrc, track) {
if (track) {
@ -185,6 +193,7 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
var lastCustomTrackMs = 0;
var currentClock;
var currentSubtitlesOctopus;
var currentAssRenderer;
var customTrackIndex = -1;
@ -960,6 +969,12 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
currentClock = null;
self._currentAspectRatio = null;
var octopus = currentSubtitlesOctopus;
if (octopus) {
octopus.dispose();
}
currentSubtitlesOctopus = null;
var renderer = currentAssRenderer;
if (renderer) {
renderer.setEnabled(false);
@ -1024,6 +1039,21 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
lastCustomTrackMs = 0;
}
function renderWithSubtitlesOctopus(videoElement, track, item) {
var options = {
video: videoElement,
subUrl: getTextTrackUrl(track, item),
fonts: [],
workerUrl: appRouter.baseUrl() + "/JavascriptSubtitlesOctopus/subtitles-octopus-worker.js",
onError: function() {
htmlMediaHelper.onErrorInternal(self, 'mediadecodeerror')
}
};
require(['JavascriptSubtitlesOctopus'], function(SubtitlesOctopus) {
currentSubtitlesOctopus = new SubtitlesOctopus(options);
});
}
function renderWithLibjass(videoElement, track, item) {
var rendererSettings = {};
@ -1071,6 +1101,14 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
});
}
function renderSsaAss(videoElement, track, item) {
if (supportsCanvas() && supportsWebWorkers()) {
renderWithSubtitlesOctopus(videoElement, track, item);
} else {
renderWithLibjass(videoElement, track, item);
}
}
function onVideoResize() {
if (browser.iOS) {
// the new sizes will be delayed for about 500ms with wkwebview
@ -1181,7 +1219,7 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
var format = (track.Codec || '').toLowerCase();
if (format === 'ssa' || format === 'ass') {
// libjass is needed here
renderWithLibjass(videoElement, track, item);
renderSsaAss(videoElement, track, item);
return;
}