pcm_record: Track initialization state

It should not access audio hardware and change settings unless it has
been initialized first and given control of it.

Change-Id: I5004602d7caa604ded751f6838b792d1ff24b3fb
Refactor audio thread to run both recording and playback.

Eliminates the pcmrec thread and keeps playback and recording engine
operation mutually-exclusive.

audio_thread.c contains the audio thread which branches to the
correct engine depending upon the request. It also handles the main
audio initialization.

Moves pcm_init into main.c just before dsp_init because I don't want
that one in audio_init in the new file.

(Also makes revision df6e1bc pointless ;)

Change-Id: Ifc1db24404e6d8dd9ac42d9f4dfbc207aa9a26e1
Some corrections after 5857c44.

Playback needs to receive a couple of settings-related messages even
when not playing.

Put the message reply back where it was when loading an encoder for
recording.

Change-Id: I8cc80f46e42a0afd119991d698510e1ebef38ead
Just init audio thread event with Q_NULL instead of SYS_TIMEOUT.

What was I thinking? Anyway, it's a little nicer and it's reserved so
shouldn't end up as a case value anywhere.

Change-Id: If745c24951518608e3f4fc51f7419ef07d7cf2ac
Should use HAVE_RECORDING, not AUDIO_HAVE_RECORDING in playback.c

SIM should work like target, sort of, when recording is initialized.

Change-Id: I12314bb98cec53d574f4b25984ef803b2c038a96
Have voice fire an event when it starts and stops playing.

Further decouples voice_thread.c from other playback areas. Also allows
other audio sources, such as FM radio, to be attenuated when voice is
playing by implementing a callback.

Defined as another playback event rather than a new event class:
PLAYBACK_EVENT_VOICE_PLAYING

Change-Id: I2e3e218be6cd6bebbf39e7883a8c0e4ed42b62bb
Argh, move a comment to the (now) proper location. :)

Change-Id: I13847b99d9aeaa05efa5b22a8e4842f193f01a3c
Fix color of files with no extension.

Based on all other references, unknown_file.color is a color, not an
index into custom_colors[]. Previously, custom_colors[-1] was returned
for files without an extension, accessing outside array boundaries
and making files without an extension black, which is hard to see.

Change-Id: Ia0883aba929582324b767df7828a36a84c0b36b9
Don't pass ar output to /dev/null.

Since ar is not running in verbose mode there is normally no output to get rid
of, and in case of errors it's useful to see them. Also, Windows doesn't know
about /dev/null.
Make dependency generation for librbspeex more silent as well.

Change-Id: Ie0d4a406e665ebd67331d6cd1fa2fc02f8bf21b9
Rework langstat.

- Generally improve code and make it compliant to PEP8.
- Make it work with Python3 as well.

Change-Id: I9e99999c59dc501664c36dd38fcb85fb60d6d9e6
Suppress unused-local-typedefs warning with Qt4.

gcc 4.8 introduces this new warning which some Qt4 headers triggers. Since we
don't want to change Qt simply disable it. The warning doesn't show up when
compiling with Qt5, so only disable it for Qt4.

Change-Id: Ia8fcf0859e0a370def36bc9b43ed4d096a80db28
Fix temporary files stored in current folder on first start.

If Rockbox Utility has no configuration file on the machine updateSettings()
will overwrite the global cache folder settings with an empty string before the
value is set properly by the user confirming the configuration dialog.  QDir()
getting an empty string will result in the current working directory getting
used, and thus the temporary files ending up there.

On Windows most users are unlikely to have noticed this since running the
executable from within the distribution zip file will make Windows execute it
in the systems temporary path.

Change-Id: I7724a82af403955786798c7380198086837e128f
skin_engine: Fix albumart logic on skin reloading.

This logic checks whether the skin's albumart dimensions differ from the
previous skin to force rebuffering if necessary. This was broken since
a while as the necessary information was reset.

Change-Id: I3b9f3a819c6af202af8ad66c13742f704ce45ab1
Reviewed-on: http://gerrit.rockbox.org/476
Tested-by: Thomas Martitz <kugel@rockbox.org>
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Fix multiple problems in radioart.c

The code was pretty broken with regard to the handle management of radio art
images, e.g. passing the wrong data to bufopen().

Change-Id: I3480f40bce81af05d14dbf045a78485c857fb261
Treat arch flags separately when building libraries.

On OS X we're passing -arch twice which dependency generation doesn't like.
Since we don't have dependencies that differ between architectures simply don't
add them during dependency generation.

Change-Id: Ie3d58bf9af31edcacb88345c7debf39eb798e302
Don't pass -Wno-unused-local-typedefs on OS X.

OS X' gcc 4.0 (still used to be able building fat binaries) doesn't ignore that
option and instead errors out.

Change-Id: Id5927ff04dc606480af9add554eeaa75c169510f
time-sync: allow passing an arbitrary time.

During testing it can be useful to set an arbitrary (non-current) time on the
device. Extend time-sync to accept an additional (optional) parameter with the
time to set. Only changes date / time, no timezone.

Change-Id: Ib320777cb245cff19ca00b20540db3a43a4e488f
Add note to AMS bootloader installation about OF file.

Some devices contain a bin file in the root folder of the player. This caused
confusion a couple of times, since the installer asks for a bin file. Add a
note that the required file is not present on the player and will get removed
automatically.

Change-Id: I6cd5c25b319770555c3939377a3ed86ed3181dad
Only show mountpoints containing a supported filesystem in dropdown.

Change configuration to use filtered mountpoints list. Add HFS+ to the list of
supported filesystems -- while Rockbox doesn't run on HFS+ MacPods will use
that format, and not having them in the list will then make OS X users wonder
why their Ipod isn't showing up. This might need to get revised later.

Change-Id: I5eeeb05be6780cb3952a0081df0ce782eca01589
Fix reds (this code needs #ifdef HAVE_ALBUMART)

Change-Id: Ia50cd846d5451b0cb5cf3a6f8097ea9fe3b3c60a