added dependencies and build files (loosely inspired by Sebastian Dorda's love-native-android)

jni/openal-soft-android/README

@@ -0,0 +1,74 @@
+Android
+=======
+https://github.com/AerialX/openal-soft-android
+
+Build with cmake using a toolchain file made for the Android NDK.
+For example, this one works:
+https://github.com/AerialX/libbricks/blob/master/cmake/toolchain.android.cmake
+Use its NDK_CPU_X86, NDK_CPU_ARM, and NDK_CPU_ARM_V7A/NDK_CPU_ARM_VFPV3
+options as needed to build for the various configurations.
+
+The OpenSL backend will be built if configured for API Level 9 (2.3) or later,
+otherwise the JNI backend will be used. It's recommended that you compile
+OpenAL Soft as a shared library (the default) when using the JNI backend.
+
+You may also try setting ANDROID_LOW_LATENCY to build the untested JNI
+backend performance patch.
+
+Precompiled binaries are offered in the downloads tab of this repo. Not
+necessarily up to date or configured to your liking.
+https://github.com/AerialX/openal-soft-android/downloads
+
+Source Install
+==============
+
+To install OpenAL Soft, use your favorite shell to go into the build/
+directory, and run:
+
+cmake ..
+
+Assuming configuration went well, you can then build it, typically using GNU
+Make (KDevelop, MSVC, and others are possible depending on your system setup
+and CMake configuration).
+
+Please Note: Double check that the appropriate backends were detected. Often,
+complaints of no sound, crashing, and missing devices can be solved by making
+sure the correct backends are being used. CMake's output will identify which
+backends were enabled.
+
+For most systems, you will likely want to make sure ALSA, OSS, and PulseAudio
+were detected (if your target system uses them). For Windows, make sure
+DirectSound was detected.
+
+
+Utilities
+=========
+
+The source package comes with an informational utility, openal-info, and is
+built by default. It prints out information provided by the ALC and AL sub-
+systems, including discovered devices, version information, and extensions.
+
+
+Configuration
+=============
+
+OpenAL Soft can be configured on a per-user and per-system basis. This allows
+users and sysadmins to control information provided to applications, as well
+as application-agnostic behavior of the library. See alsoftrc.sample for
+available settings.
+
+
+Acknowledgements
+================
+
+Special thanks go to:
+
+Creative Labs for the original source code this is based off of.
+
+Christopher Fitzgerald for the current reverb effect implementation, and
+helping with the low-pass filter.
+
+Christian Borss for the 3D panning code the current implementation is heavilly
+based on.
+
+Ben Davis for the idea behind the current click-removal code.