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server-livemix.ts
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server-livemix.ts
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/*
* Reference implementation of Channel Engine library
*/
import { ChannelEngine, ChannelEngineOpts,
IAssetManager, IChannelManager, IStreamSwitchManager,
VodRequest, VodResponse, Channel, ChannelProfile,
Schedule
} from "./index";
const { v4: uuidv4 } = require('uuid');
const STITCH_ENDPOINT = process.env.STITCH_ENDPOINT || "http://lambda.eyevinn.technology/stitch/master.m3u8";
class RefAssetManager implements IAssetManager {
private assets;
private pos;
constructor(opts?) {
if (process.env.TEST_CHANNELS) {
this.assets = {};
this.pos = {};
const testChannelsCount = parseInt(process.env.TEST_CHANNELS, 10);
for (let i = 0; i < testChannelsCount; i++) {
const channelId = `${i + 1}`;
this.assets[channelId] = [
{ id: 1, title: "Tears of Steel", uri: "https://maitv-vod.lab.eyevinn.technology/tearsofsteel_4k.mov/master.m3u8" },
{ id: 2, title: "Unhinged Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/UNHINGED_Trailer_2020.mp4/master.m3u8" },
{ id: 3, title: "Morbius Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/MORBIUS_Trailer_2020.mp4/master.m3u8" },
{ id: 4, title: "TV Plus Joachim", uri: "https://maitv-vod.lab.eyevinn.technology/tvplus-ad-joachim.mov/master.m3u8" },
{ id: 5, title: "The Outpost Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/THE_OUTPOST_Trailer_2020.mp4/master.m3u8" },
{ id: 6, title: "TV Plus Megha", uri: "https://maitv-vod.lab.eyevinn.technology/tvplus-ad-megha.mov/master.m3u8" },
];
this.pos[channelId] = 2;
}
} else {
this.assets = {
'1': [
{ id: 1, title: "Tears of Steel", uri: "https://maitv-vod.lab.eyevinn.technology/tearsofsteel_4k.mov/master.m3u8" },
{ id: 2, title: "Morbius Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/MORBIUS_Trailer_2020.mp4/master.m3u8" },
{ id: 3, title: "The Outpost Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/THE_OUTPOST_Trailer_2020.mp4/master.m3u8" },
{ id: 4, title: "Unhinged Trailer", uri: "https://maitv-vod.lab.eyevinn.technology/UNHINGED_Trailer_2020.mp4/master.m3u8" },
{ id: 5, title: "TV Plus Megha", uri: "https://maitv-vod.lab.eyevinn.technology/tvplus-ad-megha.mov/master.m3u8" },
{ id: 6, title: "TV Plus Joachim", uri: "https://maitv-vod.lab.eyevinn.technology/tvplus-ad-joachim.mov/master.m3u8" },
]
};
this.pos = {
'1': 1
};
}
}
/* @param {Object} vodRequest
* {
* sessionId,
* category,
* playlistId
* }
*/
getNextVod(vodRequest: VodRequest): Promise<VodResponse> {
return new Promise((resolve, reject) => {
const channelId = vodRequest.playlistId;
if (this.assets[channelId]) {
let vod = this.assets[channelId][this.pos[channelId]++];
if (this.pos[channelId] > this.assets[channelId].length - 1) {
this.pos[channelId] = 0;
}
const payload = {
uri: vod.uri,
breaks: [
{
pos: 0,
duration: 15 * 1000,
url: "https://maitv-vod.lab.eyevinn.technology/ads/apotea-15s.mp4/master.m3u8"
}
]
};
const buff = Buffer.from(JSON.stringify(payload));
const encodedPayload = buff.toString("base64");
const vodResponse = {
id: vod.id,
title: vod.title,
uri: STITCH_ENDPOINT + "?payload=" + encodedPayload
};
resolve(vodResponse);
} else {
reject("Invalid channelId provided");
}
});
}
handleError(err, vodResponse) {
console.error(err.message);
}
}
class RefChannelManager implements IChannelManager {
private channels;
constructor(opts?) {
this.channels = [];
if (process.env.TEST_CHANNELS) {
const testChannelsCount = parseInt(process.env.TEST_CHANNELS, 10);
for (let i = 0; i < testChannelsCount; i++) {
this.channels.push({ id: `${i + 1}`, profile: this._getProfile() });
}
} else {
this.channels = [{ id: "1", profile: this._getProfile() }];
}
}
getChannels(): Channel[] {
return this.channels;
}
_getProfile(): ChannelProfile[] {
return [
{ bw: 8242000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [1024, 458] },
{ bw: 1274000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [640, 286] },
{ bw: 742000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [480, 214] },
]
}
}
const StreamType = Object.freeze({
LIVE: 1,
VOD: 2,
});
class StreamSwitchManager implements IStreamSwitchManager {
private schedule;
constructor() {
this.schedule = {};
if (process.env.TEST_CHANNELS) {
const testChannelsCount = parseInt(process.env.TEST_CHANNELS, 10);
for (let i = 0; i < testChannelsCount; i++) {
const channelId = `${i + 1}`;
this.schedule[channelId] = [];
}
} else {
this.schedule = {
'1': []
};
}
}
generateID(): string {
return uuidv4();
}
getPrerollUri(channelId): Promise<string> {
const defaultPrerollSlateUri = "https://maitv-vod.lab.eyevinn.technology/slate-consuo.mp4/master.m3u8"
return new Promise((resolve, reject) => { resolve(defaultPrerollSlateUri); });
}
getSchedule(channelId): Promise<Schedule[]> {
return new Promise((resolve, reject) => {
if (this.schedule[channelId]) {
const tsNow = Date.now();
const streamDuration = 60 * 1000;
const startOffset = tsNow + streamDuration;
const endTime = startOffset + streamDuration;
// Break in with live and scheduled VOD content after 60 seconds of VOD2Live the first time Channel Engine starts
// Required: "assetId", "start_time", "end_time", "uri", "duration"
// "duration" is only required for StreamType.VOD
this.schedule[channelId] = this.schedule[channelId].filter((obj) => obj.end_time >= tsNow);
if (this.schedule[channelId].length === 0) {
this.schedule[channelId].push({
eventId: this.generateID(),
assetId: this.generateID(),
title: "Live stream test",
type: StreamType.LIVE,
start_time: startOffset,
end_time: endTime,
uri: "https://d2fz24s2fts31b.cloudfront.net/out/v1/6484d7c664924b77893f9b4f63080e5d/manifest.m3u8",
},
{
eventId: this.generateID(),
assetId: this.generateID(),
title: "Scheduled VOD test",
type: StreamType.VOD,
start_time: (endTime + 100*1000),
end_time: (endTime + 100*1000) + streamDuration,
uri: "https://maitv-vod.lab.eyevinn.technology/COME_TO_DADDY_Trailer_2020.mp4/master.m3u8",
duration: streamDuration,
});
}
resolve(this.schedule[channelId]);
} else {
reject("Invalid channelId provided");
}
});
}
}
const refAssetManager = new RefAssetManager();
const refChannelManager = new RefChannelManager();
const refStreamSwitchManager = new StreamSwitchManager();
const engineOptions: ChannelEngineOpts = {
heartbeat: "/",
averageSegmentDuration: 2000,
channelManager: refChannelManager,
streamSwitchManager: refStreamSwitchManager,
defaultSlateUri: "https://maitv-vod.lab.eyevinn.technology/slate-consuo.mp4/master.m3u8",
slateRepetitions: 10,
redisUrl: process.env.REDIS_URL,
};
const engine = new ChannelEngine(refAssetManager, engineOptions);
engine.start();
engine.listen(process.env.PORT || 8000);