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docs: Spotify now works on armhf

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Stein Magnus Jodal 2013-02-07 22:25:27 +01:00
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docs/installation/raspberrypi.rst
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@ -10,10 +10,9 @@ significant drawbacks to doing so. This document is intended to help you get
Mopidy running on your Raspberry Pi and to document the progress made and Mopidy running on your Raspberry Pi and to document the progress made and
issues surrounding running Mopidy on the Raspberry Pi. issues surrounding running Mopidy on the Raspberry Pi.
Mopidy will not currently run with Spotify support on the foundation-provided As of January 2013, Mopidy will run with Spotify support on both the armel
`Raspbian <http://www.raspbian.org>`_ distribution. See :ref:`not-raspbian` for (soft-float) and armhf (hard-float) architectures, which includes the Raspbian
details. However, Mopidy should run with Spotify support on any ARM Debian distribution.
image that has hardware floating-point support **disabled**.
.. image:: /_static/raspberry-pi-by-jwrodgers.jpg .. image:: /_static/raspberry-pi-by-jwrodgers.jpg
:width: 640 :width: 640
@ -219,11 +218,8 @@ software packages, as Wheezy is going to be the next release of Debian.
booting. booting.
Known Issues Audio quality issues
============ ====================
Audio Quality
-------------
The Raspberry Pi's audio quality can be sub-par through the analog output. This The Raspberry Pi's audio quality can be sub-par through the analog output. This
is known and unlikely to be fixed as including any higher-quality hardware is known and unlikely to be fixed as including any higher-quality hardware
@ -232,31 +228,9 @@ skipping audio, you may want to try a USB sound card. Additionally, you could
lower your default ALSA sampling rate to 22KHz, though this will lead to a lower your default ALSA sampling rate to 22KHz, though this will lead to a
substantial decrease in sound quality. substantial decrease in sound quality.
As of January 2013, some reports also indicate that pushing the audio through
.. _not-raspbian: PulseAudio may help. We hope to, in the future, provide a complete set of
instructions here leading to acceptable analog audio quality.
Why Not Raspbian?
-----------------
Mopidy with Spotify support is currently unavailable on the recommended
`Raspbian <http://www.raspbian.org>`_ Debian distribution that the Raspberry Pi
foundation has made available. This is due to Raspbian's hardware
floating-point support. The Raspberry Pi comes with a co-processor designed
specifically for floating-point computations (commonly called an FPU). Taking
advantage of the FPU can speed up many computations significantly over
software-emulated floating point routines. Most of Mopidy's dependencies are
open-source and have been (or can be) compiled to support the ``armhf``
architecture. However, there is one component of Mopidy's stack which is
closed-source and crucial to Mopidy's Spotify support: libspotify.
The ARM distributions of libspotify available on `Spotify's developer website
<http://developer.spotify.com>`_ are compiled for the ``armel`` architecture,
which has software floating-point support. ``armel`` and ``armhf`` software
cannot be mixed, and pyspotify links with libspotify as C extensions. Thus,
Mopidy will not run with Spotify support on ``armhf`` distributions.
If the Spotify folks ever release builds of libspotify with ``armhf`` support,
Mopidy *should* work on Raspbian.
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