Chromecast, CheapCast and TV - DevFest Brussels 2013
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Is GoogleTV doomed? Will Chrome is in Chromecast? Learn how Google's Chromecast works on the inside.
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Chromecast, CheapCast and TV - DevFest Brussels 2013
- 1. Chromecast, Cheapcast and TV Sebastian Mauer GDG Aachen DevFest Brussels November 16th, 2013
- 3. Who am I? Sebastian Mauer GDG Aachen Co-Lead Software Engineer CS Student I don’t work for Google…yet
- 4. Part I: Google TV
- 5. GoogleTV • Google’s first attempt to „own“ the TV • Introduced at Google I/O 2010 • First Device, x86-based Logitech Revue • US only at launch
- 6. By the summer of 2012, the majority of the televisions you see in stores will have Google TV embedded. - Eric Schmidt at LeWeb 2011
- 8. Three Generations 1. Generation, late 2010 based on Android 3.2 2. Generation, Summer 2012 based on Android 3.2 3. Generation, 2013 probably on Android 4.2.2
- 9. GoogleTV: Pros • Part of the Android-family. • Deploying apps is easy™ (via Play Store) • Re-use most of your existing Android code
- 10. GoogleTV: Cons • Does not evolve as fast as mainline Android • Not many devices sold (500,000 - 1,000,000) • Late start in the European Union (2012)
- 11. Help me Android. You're my only hope
- 12. Part II: ChromeCast aka Google Cast Devices
- 14. • Model Number: H2G2-42 • It’s not based on ChromeOS • It’s based on Android and Chromium • It’s not going to kill GoogleTV http://www.ifixit.com/Teardown/Chromecast+Teardown/16069 ChromeCast: Hardware
- 15. ChromeCast: Pros • Very cheap hardware (35$) • Very easy to use (My Grandma can do it™) • Web Developers can easily write „Receiver“-Apps • Simple Protocol Stack
- 16. ChromeCast: Cons • Google Cast SDK is still a Developer Preview (read: things will break, things will change) • You have to manually whitelist all your apps with Google • It’s not officially released outside the U.S.
- 17. ChromeCast: Protocol Stack UDP • SSDP (Simple Service Discovery Protocol) • DIAL (DIscovery And Launch) • RAMP (Remote Application Media Protocol) • HTML5 & JS (You know that this is) • WebSockets (Bi-directional communication Browser<>WebApp) • WebRTC (Web Real Time Communication) WebTech
- 18. ChromeCast: How does it work?
- 19. ChromeCast: How it works! 1. Advertises ChromeCast using SSDP (UDP Broadcast) 3. ! ! Requests App and opens WebSocket connection 4. 2. ! Discovers Endpoints using DIAL ! ! ! CC fetches HTML5 based 1st Screen App (opens WebSocket)
- 20. ChromeCast: How it works! II 5. ! ! ! ! Sends request to play media 7. ! ! ! ! ! 6. ! Media is downloaded/streamed by ChromeCast device ! ! ! ! ! HTML5 app receives media request (WebSocket) starts fetching content.
- 21. ChromeCast: DIAL • Protocol published by Netflix • Uses SSDP for Service Announcement • DIAL REST WebService for exchanging Device capabilities and controlling
- 23. ChromeCast: Sender App Cast SDK available for • • Needs Whitelisting with Google
- 24. ChromeCast: Receiver App <html> <script src="https://www.gstatic.com/cast/js/receiver/1.0/cast_receiver.js"> </script> <script type="text/javascript"> ! ! ! ! var receiver = new cast.receiver.Receiver( 'App ID', [cast.receiver.RemoteMedia.NAMESPACE], "", 5); var remoteMedia = new cast.receiver.RemoteMedia(); remoteMedia.addChannelFactory( receiver.createChannelFactory(cast.receiver.RemoteMedia.NAMESPACE)); receiver.start(); window.addEventListener('load', function() { var elem = document.getElementById('vid'); remoteMedia.setMediaElement(elem); }); </script> <body> <video id="vid" style="position:absolute;top:0;left:0;height:100%;width:100%" /> </body> </html>
- 25. ChromeCast is not just for „streaming“ content.
- 26. It’s a remote controllable Chrome Browser running on your TV.
- 27. Part III: CheapCast* * includes shameless plug
- 28. CheapCast all the Droids • Is an app that emulates a ChromeCast (or Google Cast) device on almost any Android Device • Implements DIAL, RAMP/WS Proxy-ing • Does not care if your id is whitelisted or not. • Written by me
- 29. CheapCast: Components 1st Screen Output Receiver App SSDP Service WebView DIAL REST WS ChromeCast API Ext Sender App
- 30. CheapCast: Use Cases • Start developing ChromeCast apps without owning an actual ChromeCast Device • Turn one of your old Android-devices into a ChromeCast Dongle (connect via MHL<->HDMI) • Cast content from your Android Smartphone to your Android Tablet just for the hell of it.
- 31. CheapCast: Use Cases Google Music YouTube
- 32. CheapCast
- 33. CheapCast: OpenSource https://github.com/mauimauer/cheapcast Licensed under the Apache 2.0 License MadeFp ature: g eossible obyin c mC Up hng! iu ti rom m Cas Tab
- 34. Demo
- 35. CheapCast: Get it now
- 36. Q&A