jellyfin-roku/source/VideoPlayer.brs

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function VideoPlayer(id)
' Get video controls and UI
video = CreateObject("roSGNode", "JFVideo")
video.id = id
video = VideoContent(video)
if video = invalid
return invalid
end if
jellyfin_blue = "#00a4dcFF"
video.retrievingBar.filledBarBlendColor = jellyfin_blue
video.bufferingBar.filledBarBlendColor = jellyfin_blue
video.trickPlayBar.filledBarBlendColor = jellyfin_blue
return video
end function
function VideoContent(video) as object
' Get video stream
video.content = createObject("RoSGNode", "ContentNode")
params = {}
meta = ItemMetaData(video.id)
video.content.title = meta.Name
' If there is a last playback positon, ask user if they want to resume
position = meta.json.UserData.PlaybackPositionTicks
if position > 0 then
dialogResult = startPlaybackOver(position)
'Dialog returns -1 when back pressed, 0 for resume, and 1 for start over
if dialogResult = -1 then
'User pressed back, return invalid and don't load video
return invalid
else if dialogResult = 1 then
'Start Over selected, change position to 0
position = 0
end if
end if
video.content.PlayStart = int(position/10000000)
playbackInfo = ItemPostPlaybackInfo(video.id, position)
if playbackInfo = invalid then
return invalid
end if
video.PlaySessionId = playbackInfo.PlaySessionId
if meta.live then
video.content.live = true
video.content.StreamFormat = "hls"
'Original MediaSource seems to be a placeholder and real stream data is avaiable
'after POSTing to PlaybackInfo
json = meta.json
json.AddReplace("MediaSources", playbackInfo.MediaSources)
json.AddReplace("MediaStreams", playbackInfo.MediaSources[0].MediaStreams)
meta.json = json
end if
container = getContainerType(meta)
video.container = container
transcodeParams = getTranscodeParameters(meta)
transcodeParams.append({"PlaySessionId": video.PlaySessionId})
if meta.live then
_livestream_params = {
"MediaSourceId": playbackInfo.MediaSources[0].Id,
"LiveStreamId": playbackInfo.MediaSources[0].LiveStreamId,
"MinSegments": 2 'This is a guess about initial buffer size, segments are 3s each
}
params.append(_livestream_params)
transcodeParams.append(_livestream_params)
end if
subtitles = sortSubtitles(meta.id,meta.json.MediaStreams)
video.Subtitles = subtitles["all"]
video.content.SubtitleTracks = subtitles["text"]
'TODO: allow user selection of subtitle track before playback initiated, for now set to first track
if video.Subtitles.count() then
video.SelectedSubtitle = 0
else
video.SelectedSubtitle = -1
end if
if video.SelectedSubtitle <> -1 and displaySubtitlesByUserConfig(video.Subtitles[video.SelectedSubtitle], meta.json.MediaStreams[1]) then
if video.Subtitles[0].IsTextSubtitleStream then
video.subtitleTrack = video.availableSubtitleTracks[video.Subtitles[0].TextIndex].TrackName
video.suppressCaptions = false
else
video.suppressCaptions = true
'Watch to see if system overlay opened/closed to change transcoding if caption mode changed
m.device.EnableAppFocusEvent(True)
video.captionMode = video.globalCaptionMode
if video.globalCaptionMode = "On" or (video.globalCaptionMode = "When mute" and m.mute = true) then
'Only transcode if subtitles are turned on
transcodeParams.append({"SubtitleStreamIndex" : video.Subtitles[0].index })
end if
end if
else
video.suppressCaptions = true
video.SelectedSubtitle = -1
end if
video.directPlaySupported = directPlaySupported(meta)
video.decodeAudioSupported = decodeAudioSupported(meta)
video.transcodeParams = transcodeParams
if video.directPlaySupported and video.decodeAudioSupported and transcodeParams.SubtitleStreamIndex = invalid then
params.append({
"Static": "true",
"Container": container
"PlaySessionId": video.PlaySessionId
})
video.content.url = buildURL(Substitute("Videos/{0}/stream", video.id), params)
video.content.streamformat = container
video.content.switchingStrategy = ""
video.isTranscode = False
else
video.content.url = buildURL(Substitute("Videos/{0}/master.m3u8", video.id), transcodeParams)
video.isTranscoded = true
end if
video.content = authorize_request(video.content)
' todo - audioFormat is read only
video.content.audioFormat = getAudioFormat(meta)
video.content.setCertificatesFile("common:/certs/ca-bundle.crt")
return video
end function
function getTranscodeParameters(meta as object)
params = {}
if decodeAudioSupported(meta) and meta.json.MediaStreams[1] <> invalid and meta.json.MediaStreams[1].Type = "Audio" then
audioCodec = meta.json.MediaStreams[1].codec
audioChannels = meta.json.MediaStreams[1].channels
else
params.Append({"AudioCodec": "aac"})
' If 5.1 Audio Output is connected then allow transcoding to 5.1
di = CreateObject("roDeviceInfo")
if di.GetAudioOutputChannel() = "5.1 surround" and di.CanDecodeAudio({ Codec: "aac", ChCnt: 6 }).result then
params.Append({"MaxAudioChannels": "6"})
else
params.Append({"MaxAudioChannels": "2"})
end if
end if
streamInfo = { Codec: meta.json.MediaStreams[0].codec }
if meta.json.MediaStreams[0].Profile <> invalid and meta.json.MediaStreams[0].Profile.len() > 0 then
streamInfo.Profile = LCase(meta.json.MediaStreams[0].Profile)
end if
if meta.json.MediaSources[0].container <> invalid and meta.json.MediaSources[0].container.len() > 0 then
streamInfo.Container = meta.json.MediaSources[0].container
end if
devinfo = CreateObject("roDeviceInfo")
res = devinfo.CanDecodeVideo(streamInfo)
if res.result = false then
params.Append({"VideoCodec": "h264"})
streamInfo.Profile = "h264"
streamInfo.Container = "ts"
end if
params.Append({"MediaSourceId": meta.id})
return params
end function
'Checks available subtitle tracks and puts subtitles in forced, default, and non-default/forced but preferred language at the top
function sortSubtitles(id as string, MediaStreams)
tracks = { "forced": [], "default": [], "normal": [] }
'Too many args for using substitute
dashedid = id.left(8) + "-" + id.mid(8,4) + "-" + id.mid(12,4) + "-" + id.mid(16,4) + "-" + id.right(12)
prefered_lang = m.user.Configuration.SubtitleLanguagePreference
for each stream in MediaStreams
if stream.type = "Subtitle" then
'Documentation lists that srt, ttml, and dfxp can be sideloaded but only srt was working in my testing,
'forcing srt for all text subtitles
url = Substitute("{0}/Videos/{1}/{2}/Subtitles/{3}/0/", get_url(), dashedid, id, stream.index.tostr())
url = url + Substitute("Stream.js?api_key={0}&format=srt", get_setting("active_user"))
stream = {
"Track": { "Language" : stream.language, "Description": stream.displaytitle , "TrackName": url },
"IsTextSubtitleStream": stream.IsTextSubtitleStream,
"Index": stream.index,
"TextIndex": -1,
"IsDefault": stream.IsDefault,
"IsForced": stream.IsForced
}
if stream.isForced then
trackType = "forced"
else if stream.IsDefault then
trackType = "default"
else
trackType = "normal"
end if
if prefered_lang <> "" and prefered_lang = stream.Track.Language then
tracks[trackType].unshift(stream)
else
tracks[trackType].push(stream)
end if
end if
end for
tracks["default"].append(tracks["normal"])
tracks["forced"].append(tracks["default"])
textTracks = []
for i = 0 to tracks["forced"].count() - 1
if tracks["forced"][i].IsTextSubtitleStream then tracks["forced"][i].TextIndex = textTracks.count()
textTracks.push(tracks["forced"][i].Track)
end for
return { "all" : tracks["forced"], "text": textTracks }
end function
'Opens dialog asking user if they want to resume video or start playback over
function startPlayBackOver(time as LongInteger) as integer
return option_dialog([ "Resume playing at " + ticksToHuman(time) + ".", "Start over from the beginning." ])
end function
function directPlaySupported(meta as object) as boolean
devinfo = CreateObject("roDeviceInfo")
if meta.json.MediaSources[0] <> invalid and meta.json.MediaSources[0].SupportsDirectPlay = false then
return false
end if
streamInfo = { Codec: meta.json.MediaStreams[0].codec }
if meta.json.MediaStreams[0].Profile <> invalid and meta.json.MediaStreams[0].Profile.len() > 0 then
streamInfo.Profile = LCase(meta.json.MediaStreams[0].Profile)
end if
if meta.json.MediaSources[0].container <> invalid and meta.json.MediaSources[0].container.len() > 0 then
streamInfo.Container = meta.json.MediaSources[0].container
end if
return devinfo.CanDecodeVideo(streamInfo).result
end function
function decodeAudioSupported(meta as object) as boolean
'Check for missing audio and allow playing
if meta.json.MediaStreams[1] = invalid or meta.json.MediaStreams[1].Type <> "Audio" then return true
devinfo = CreateObject("roDeviceInfo")
codec = meta.json.MediaStreams[1].codec
streamInfo = { Codec: codec, ChCnt: meta.json.MediaStreams[1].channels }
'Otherwise check Roku can decode stream and channels
canDecode = devinfo.CanDecodeAudio(streamInfo)
return canDecode.result
end function
function getContainerType(meta as object) as string
' Determine the file type of the video file source
print type(meta)
if meta.json.mediaSources = invalid then return ""
container = meta.json.mediaSources[0].container
if container = invalid
container = ""
else if container = "m4v" or container = "mov"
container = "mp4"
end if
return container
end function
function getAudioFormat(meta as object) as string
' Determine the codec of the audio file source
if meta.json.mediaSources = invalid then return ""
audioInfo = getAudioInfo(meta)
if audioInfo.count() = 0 or audioInfo[0].codec = invalid then return ""
return audioInfo[0].codec
end function
function getAudioInfo(meta as object) as object
' Return audio metadata for a given stream
results = []
for each source in meta.json.mediaSources[0].mediaStreams
if source["type"] = "Audio"
results.push(source)
end if
end for
return results
end function
function ReportPlayback(video, state = "update" as string)
params = {
"PlaySessionId": video.PlaySessionId,
"PositionTicks": str(int(video.position)) + "0000000",
"IsPaused": (video.state = "paused"),
}
if video.content.live then
params.append({
"MediaSourceId": video.transcodeParams.MediaSourceId,
"LiveStreamId": video.transcodeParams.LiveStreamId
})
end if
PlaystateUpdate(video.id, state, params)
end function
function StopPlayback()
video = m.scene.focusedchild
video.control = "stop"
m.device.EnableAppFocusEvent(False)
video.findNode("playbackTimer").control = "stop"
video.visible = "false"
if video.status = "finished" then MarkItemWatched(video.id)
ReportPlayback(video, "stop")
RemoveCurrentGroup()
end function
function displaySubtitlesByUserConfig(subtitleTrack, audioTrack)
subtitleMode = m.user.Configuration.SubtitleMode
audioLanguagePreference = m.user.Configuration.AudioLanguagePreference
subtitleLanguagePreference = m.user.Configuration.SubtitleLanguagePreference
if subtitleMode = "Default"
return (subtitleTrack.isForced or subtitleTrack.isDefault)
else if subtitleMode = "Smart"
return (audioLanguagePreference <> "" and audioTrack.Language <> invalid and subtitleLanguagePreference <> "" and subtitleTrack.Track.Language <> invalid and subtitleLanguagePreference = subtitleTrack.Track.Language and audioLanguagePreference <> audioTrack.Language)
else if subtitleMode = "OnlyForced"
return subtitleTrack.IsForced
else if subtitleMode = "Always"
return true
else if subtitleMode = "None"
return false
else
return false
end if
end function