Mopidy

Introduction to Mopidy I held at the Iterate Weekly Breakfast Meeting 2010-03-10

Transcript

1. Mopidy MPD server with Spotify support www.mopidy.com
2. «når skal vi starte på spotify mpd serveren da? :P» Johannes, 2009-12-23
3. What is MPD?
4. What is MPD? Short for Music Player Daemon
5. What is MPD? Server - Protocol - Client
6. What is MPD? The server plays music from it's local disk
7. What is MPD? The client controls playback and playlists, but got nothing to do with the actual audio data
8. What is MPD? The protocol is badly documented and inconsistenly used by the clients But it ain't that huge
9. What is Spotify?
10. What is Spotify? 99 kr per month in exchange for all the music you'll ever need in high quality on PC and mobile Including: Windows, Mac, Linux, iPhone, Android, S60 Excluding: Beatles, Pink Floyd, Led Zeppelin, Frank Zappa
11. What is Spotify? Free ad-financed version available, but we're going Premium iPhone, Android, S60 and all the open source solutions requires a Premium subscription
12. What is MPD+Spotify?
13. What is MPD+Spotify? Mopidy
14. What is MPD+Spotify? www.mopidy.com github.com/jodal/mopidy
15. Where to begin?
16. Where to begin? Extend existing MPD server? It's old, huge and we're not C coders Not yet, at least
17. Where to begin? Reimplement then Just the server! No way we're doing all those clients. And no way we're decoding music ourselves.
18. Where to begin? Scala and Actors? Enough to learn in implementing an MPD server and Spotify integration
19. Where to begin? Scala and Actors? Python is known ground
20. Where to begin? Spotify integration?
21. Where to begin? Spotify integration? despotify is an open, reverse engineered Spotify library C, Linux and OS X, not very active Python wrapper named spytify (thanks to Jørgen P. Tjernø)
22. Where to begin? Spotify integration? libspotify is the closed source, but official library C, Linux 32-bit only (now 64-bit too) Python wrapper named pyspotify (thanks to Doug Winter)
23. Where to begin? Spotify integration? Lets do both! We don't know what problems will arise, so we keep our options open
24. Architecture?
25. Architecture? Creating it as we walk, refactoring early and often
26. Architecture? Frontends - Backends - Mixers Clear APIs and loose coupling
27. Architecture? Frontends work with protocols and parsing
28. Architecture? We got one frontend this far: Mpd{Server,Session,Handler}
29. Architecture? Backends work with playing music
30. Architecture? We got two backends: {Despotify,Libspotify}Backend
31. Architecture? And a third is underway: GstreamerBackend It plays music from local disc, like the original MPD server (thanks to Thomas Adamcik)
32. Architecture? Mixers are the latest addition They work with volume control
33. Architecture? We got two mixers: {Alsa,Osa}Mixer One for Linux and one for OS X (the last one actually includes two lines of AppleScript)
34. Code?
35. Code? github.com/jodal/mopidy GPLv2 license
37. Tests?
38. Tests? 202 and counting Runs in 0.4s >100 new with the gstreamer branch
39. Documentation?
40. Documentation? Lots! www.mopidy.com
42. Talk?
43. Talk? #mopidy at irc.freenode.net Currently eight humans* and a bot * 6 Norwegians, 1 Swede, 1 Briton
44. Future?
45. Future? Version 0.1 We need to implement this release early, release often thingy
46. Future? Replace libspotify with libopenspotify? Identical API, open source, adds OS X and Windows support Should be a drop-in replacement with only benefits
47. Future? GstreamerBackend So we can replace the original MPD server
48. Future? Multiple backends at the same time Mix tracks from Spotify and disk in the same playlist
49. Future? Bonjour/Avahi here-I-am Broadcast our existence so clients can automagically find the server
50. Future? A non-MPD frontend?
51. Future? Icecast streams? Server streams music to somewhere else
52. Future? Squeezebox support? Deliver music to Squeezebox devices
53. Future? AirPort Express support? Deliver music to AirPort Express devices
54. Future? NAD/Denon mixer Control volume on amplifiers through RS-232
55. Future? Distribution infrastructure Python packaging, Debian packaging, Homebrew recipies, build server
56. stein.magnus@jodal.no, 2010-03-09 www.mopidy.com