Load Sounds From Filesystem

[BrentDaMage]

Currently sounds are just embedded in memory. We should update our audio API abstraction layers to support loading sounds from files. Streaming sounds from files would also allow us to add in-game music.

This means updating:

1. SoundSystemAL
2. SoundSystemDS
3. SoundSystemSL

[TheBrokenRail]

This shouldn't be that difficult. Currently sounds are stored as PCM data, which if I understand correctly, is one header away from being a WAV file. All that should be needed is to change grabsounds.py to extract files (with the correct header) and to make the SoundSystem* classes do an fopen and fread instead of just using a variable.

On the topic of grabsounds.py changes, I'd also suggest changing it so that it actually parses the symbol table of libminecraftpe.so instead of hard-coding addresses so it can use more than one APK version.

[iProgramMC]

Correct, a WAV file is pretty just PCM data with a header. It probably isn't that hard to make grabsounds.py output WAV files instead.

It is probably not that hard to parse the symbol table of the Minecraft PE shared object either, but I haven't really felt like doing it, because to get the best experience you'll need to use the 0.1.3 assets anyway.

[BrentDaMage]

On the topic of grabsounds.py changes, I'd also suggest changing it so that it actually parses the symbol table of libminecraftpe.so instead of hard-coding addresses so it can use more than one APK version.

On a side note, the PCM sound files can be located in the files of iOS builds as well, particularly 0.10.0.