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Add local .srt subtitle support

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hensm
2020-01-19 17:12:37 +00:00
parent 81fc98dcc6
commit ffb84efb47
2 changed files with 191 additions and 36 deletions
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44
ext/src/senders/media/index.ts
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@@ -23,7 +23,10 @@ function getLocalAddress () {
});
}
function startMediaServer (filePath: string, port: number) {
function startMediaServer (filePath: string, port: number)
: Promise<{ mediaPath: string
, subtitlePaths: string[] }> {
return new Promise((resolve, reject) => {
backgroundPort.postMessage({
subject: "bridge:/mediaServer/start"
@@ -42,7 +45,7 @@ function startMediaServer (filePath: string, port: number) {
switch (message.subject) {
case "mediaCast:/mediaServer/started": {
resolve();
resolve(message.data);
break;
}
case "mediaCast:/mediaServer/error": {
@@ -110,8 +113,10 @@ function getSession (opts: InitOptions): Promise<cast.Session> {
function getMedia (opts: InitOptions): Promise<cast.media.Media> {
return new Promise(async resolve => {
let mediaUrlObject = new URL(opts.mediaUrl);
const mediaTitle = mediaUrlObject.pathname;
let mediaUrl = new URL(opts.mediaUrl);
let subtitleUrls: URL[] = [];
const mediaTitle = mediaUrl.pathname;
/**
* If the media is a local file, start an HTTP media server
@@ -123,24 +128,41 @@ function getMedia (opts: InitOptions): Promise<cast.media.Media> {
try {
// Wait until media server is listening
await startMediaServer(mediaUrlObject.pathname, port);
const { mediaPath, subtitlePaths }
= await startMediaServer(mediaTitle, port);
const baseUrl = new URL(`http://${host}:${port}/`);
mediaUrl = new URL(mediaPath, baseUrl)
subtitleUrls = subtitlePaths.map(
path => new URL(path, baseUrl));
} catch (err) {
console.error("Failed to start media server");
return;
}
mediaUrlObject = new URL(`http://${host}:${port}/`);
}
const activeTrackIds: number[] = [];
const mediaInfo = new cast.media.MediaInfo(mediaUrlObject.href, null);
const mediaInfo = new cast.media.MediaInfo(mediaUrl.href, null);
mediaInfo.metadata = new cast.media.GenericMediaMetadata();
mediaInfo.metadata.metadataType = cast.media.MetadataType.GENERIC;
mediaInfo.metadata.title = mediaTitle;
mediaInfo.tracks = [];
let trackIndex = 0;
for (const subtitleUrl of subtitleUrls) {
const castTrack = new cast.media.Track(
trackIndex, cast.media.TrackType.TEXT);
castTrack.name = subtitleUrl.pathname;
castTrack.trackContentId = subtitleUrl.href;
castTrack.trackContentType = "text/vtt";
castTrack.subtype = cast.media.TextTrackType.SUBTITLES;
mediaInfo.tracks.push(castTrack);
}
if (mediaElement) {
if (mediaElement instanceof HTMLVideoElement) {
@@ -163,7 +185,7 @@ function getMedia (opts: InitOptions): Promise<cast.media.Media> {
* and type as TrackType.TEXT.
*/
const castTrack = new cast.media.Track(
index, cast.media.TrackType.TEXT);
trackIndex, cast.media.TrackType.TEXT);
// Copy TextTrack properties
castTrack.name = track.label;
@@ -204,8 +226,10 @@ function getMedia (opts: InitOptions): Promise<cast.media.Media> {
// If enabled, mark as active track for load request
if (track.mode === "showing" || trackElement.default) {
activeTrackIds.push(index);
activeTrackIds.push(trackIndex);
}
trackIndex++;
});
}
}