75 lines
2.8 KiB
JavaScript
75 lines
2.8 KiB
JavaScript
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function getMediaInfoFromTrack(libraryItem, castImage, track) {
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// https://developers.google.com/cast/docs/reference/web_sender/chrome.cast.media.AudiobookChapterMediaMetadata
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var metadata = new chrome.cast.media.AudiobookChapterMediaMetadata()
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metadata.bookTitle = libraryItem.media.metadata.title
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metadata.chapterNumber = track.index
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metadata.chapterTitle = track.title
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metadata.images = [castImage]
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metadata.title = track.title
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metadata.subtitle = libraryItem.media.metadata.title
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var trackurl = track.fullContentUrl
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var mimeType = track.mimeType
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var mediainfo = new chrome.cast.media.MediaInfo(trackurl, mimeType)
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mediainfo.metadata = metadata
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mediainfo.itemId = track.index
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mediainfo.duration = track.duration
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return mediainfo
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}
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function buildCastMediaInfo(libraryItem, coverUrl, tracks) {
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const castImage = new chrome.cast.Image(coverUrl)
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return tracks.map(t => getMediaInfoFromTrack(libraryItem, castImage, t))
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}
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function buildCastQueueRequest(libraryItem, coverUrl, tracks, startTime) {
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var mediaInfoItems = buildCastMediaInfo(libraryItem, coverUrl, tracks)
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var containerMetadata = new chrome.cast.media.AudiobookContainerMetadata()
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containerMetadata.authors = libraryItem.media.metadata.authors.map(a => a.name)
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containerMetadata.narrators = libraryItem.media.metadata.narrators || []
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containerMetadata.publisher = libraryItem.media.metadata.publisher || undefined
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containerMetadata.title = libraryItem.media.metadata.title
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var mediaQueueItems = mediaInfoItems.map((mi) => {
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var queueItem = new chrome.cast.media.QueueItem(mi)
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return queueItem
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})
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// Find track to start playback and calculate track start offset
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var track = tracks.find(at => at.startOffset <= startTime && at.startOffset + at.duration > startTime)
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var trackStartIndex = track ? track.index - 1 : 0
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var trackStartTime = Math.floor(track ? startTime - track.startOffset : 0)
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var queueData = new chrome.cast.media.QueueData(libraryItem.id, libraryItem.media.metadata.title, '', false, mediaQueueItems, trackStartIndex, trackStartTime)
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queueData.containerMetadata = containerMetadata
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queueData.queueType = chrome.cast.media.QueueType.AUDIOBOOK
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return queueData
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}
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function castLoadMedia(castSession, request) {
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return new Promise((resolve) => {
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castSession.loadMedia(request)
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.then(() => resolve(true), (reason) => {
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console.error('Load media failed', reason)
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resolve(false)
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})
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})
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}
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function buildCastLoadRequest(libraryItem, coverUrl, tracks, startTime, autoplay, playbackRate) {
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var request = new chrome.cast.media.LoadRequest()
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request.queueData = buildCastQueueRequest(libraryItem, coverUrl, tracks, startTime)
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request.currentTime = request.queueData.startTime
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request.autoplay = autoplay
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request.playbackRate = playbackRate
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return request
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}
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export {
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buildCastLoadRequest,
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castLoadMedia
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} |