Move out the MediaStoreCompat interface into a full interface called
Backend.
In preparation for direct metadata parsing, it would be useful to
create some kind of object system to properly handle the capabilities
of each metadata indexing mode. Backend fulfills that by allowing
each object to implement their own query and then loading routine.
This system is designed somewhat strangely. This is firstly because
the ExoPlayer metadata backend will have to plug in to the original
MediaStore backend, so making methods more granular allows the
ExoPlayer backend to avoid some of the stupid inefficiencies from
the actual MediaStore backend, such as the genre loading process.
We also want to separate the steps of loading music in order to
more adequately show the current loading process to the user in
a future change.
Remove references to android system strings, in favor of in-house
translations.
Previously Auxio would use the `android.R.string.ok` and
`android.R.string.cancel` strings to represent Ok and Cancel
respectively, but these system strings are actually untranslated on
some devices, so it is better for i18n if we use our own strings
for such.
Implement a UI frontend for customizing the ReplayGain pre-amp value.
This finally completes Auxio's ReplayGain implementation. Not only
that, it also shows how Auxio can use positive ReplayGain values,
unlike other apps.
As a side-note, this also fiddles with the dialog style somewhat.
I got carried away.
Resolves#114.
Rename LoopMode to RepeatMode, which is generally much clearer
than the previous name.
This changes all non-breaking instances of "loop" in the app with
"repeat".
Rework audio focus to rely on the native ExoPlayer implementation
instead of a custom implementation.
Previously, we avoided ExoPlayer's AudioFocus system as it never
played after a transient lost. A few versions later now through,
now it does, so we may as well switch to it. This does introduce
a bug where ReplayGain functionality will conflict with audio
focus, but I hope to eliminate this with #115 as I switch to
an AudioProcessor instead of a callback.
Turn the headset focus setting into the headset autoplay setting.
The way auxio handles headsets is...odd. Sometimes the MediaSession
handles it and Auxio could not care less, and sometimes Auxio actually
needs to handle it. As a result, the idea of being able to disable
headset focus is more or less moot because it will only apply to some
devices and not others.
On the other end, the way Auxio automatically begins playback once a
headset is plugged in is also quite weird. It only works on wired
headsets, and when it does, it overrides all other apps that might
also be playing audio. It's not to say that it's a bad feature, but
it's also one that I don't want to make the defualt. Auxio should
still play along within the confines of Android's expectations, after
all.
Replacing the existing "Headset focus" setting with a new "Headset
autoplay" setting solves both of these issues, as it prevents a
mis-guided disabling of the setting that doesn't actually disable
the feature and it relegates the quirky autoplay behavior to an
setting not enabled by default.
