Cross compile FFmpeg on MacOS for Android

Use JNI in the context of multi-threading.

MediaCodec basics and how to decode a video with it.

Register native C++ methods for Java to access them.

职场八股文

Integer, fix-point number, floating-point number

Host machine: MacOS
Target device: Android armv8a

Integrate libpng to C++ projects and read external images.

Updating

SIMD introduction.