update cmakelists and readme for android libs

Author: maxnut

CMakeLists.txt

@@ -43,7 +43,23 @@ if (WIN32)
         mf mfplat mfuuid bcrypt strmiids.lib
     ) # windows
 elseif (ANDROID) 
-    set(STATIC_LIBS ...) # android
+    if (ANDROID_ABI STREQUAL "arm64-v8a")
+        set(STATIC_LIBS
+            ${CMAKE_SOURCE_DIR}/lib/arm64-v8a/libavcodec.a
+            ${CMAKE_SOURCE_DIR}/lib/arm64-v8a/libavformat.a
+            ${CMAKE_SOURCE_DIR}/lib/arm64-v8a/libavutil.a
+            ${CMAKE_SOURCE_DIR}/lib/arm64-v8a/libswresample.a
+            ${CMAKE_SOURCE_DIR}/lib/arm64-v8a/libswscale.a
+        ) # android
+    elseif(ANDROID_ABI STREQUAL "armeabi-v7a")
+        set(STATIC_LIBS
+            ${CMAKE_SOURCE_DIR}/lib/armeabi-v7a/libavcodec.a
+            ${CMAKE_SOURCE_DIR}/lib/armeabi-v7a/libavformat.a
+            ${CMAKE_SOURCE_DIR}/lib/armeabi-v7a/libavutil.a
+            ${CMAKE_SOURCE_DIR}/lib/armeabi-v7a/libswresample.a
+            ${CMAKE_SOURCE_DIR}/lib/armeabi-v7a/libswscale.a
+        ) # android
+    endif()
 else ()
     set(STATIC_LIBS ...) # macos
 endif()

README.md

@@ -57,6 +57,18 @@ void audioRaw() {
 
 ## Build instructions
 ### Windows
-To get the needed libraries on Windows, you can use vcpkg
+To get the needed libraries on Windows, you can use vcpkg:
 ```sh
 vcpkg install ffmpeg[core,avcodec,avformat,avutil,swscale,swresample,amf,x264,x265,nvcodec]:x64-windows-static --recurse
+```
+
+## Android
+Clone [this](https://github.com/EclipseMenu/ffmpeg-android-maker/) repository and run ffmpeg-android-maker.sh, this will produce static libraries in the build folder:
+```sh
+git clone https://github.com/EclipseMenu/ffmpeg-android-maker/
+cd ffmpeg-android-maker
+./ffmpeg-android-maker.sh
+```
+Read the README in the repository for further instructions.
+
+You can either run it natively on Linux or using WSL on Windows.