Integration of libaom

.travis.yml

@@ -8,4 +8,4 @@ before_install:
   # Keeping track of the NDK version that was used
   - cat $ANDROID_NDK_HOME/source.properties
 script:
-  - bash -e ffmpeg-android-maker.sh --enable-libmp3lame
+  - bash -e ffmpeg-android-maker.sh --enable-libmp3lame --enable-libaom

scripts/libaom/android.cmake

@@ -0,0 +1,30 @@
+# Enable NEON for all ARM processors
+set(ANDROID_ARM_NEON TRUE)
+
+# By including this file all necessary variables that point to compiler, linker, etc.
+# will be setup. Well, almost all.
+# Two variables have to be set before this line though:
+# ANDROID_PLATOFORM - the API level to compile against (number)
+# ANDROID_ABI - the API of the target platform
+include("$ENV{ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake")
+
+# AS_EXECUTABLE (AV1 Codec Library's variable) should point to an assembler
+# For x86 and x86_64 ABIs it needs yasm
+# For armeabi-v7a and arm64-v8a is is ok to use GNU assembler
+# When ANDROID_ABI is x86 or _86_64,
+# then CMAKE_ASM_NASM_COMPILER variable will point to the yasm compiler (it is set by android.toolchain.cmake)
+if(DEFINED CMAKE_ASM_NASM_COMPILER)
+  set(AS_EXECUTABLE ${CMAKE_ASM_NASM_COMPILER})
+else()
+  set(AS_EXECUTABLE ${_CMAKE_TOOLCHAIN_PREFIX}as)
+endif()
+
+# AV1 Codec Library doesn't recognise 'i686' as CMAKE_SYSTEM_PROCESSOR
+# We have to specify x86 in AOM_TARGET_CPU variable instead
+if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "i686")
+  set(AOM_TARGET_CPU x86)
+endif()
+
+# AV1 Codec Library doesn't recognise 'Android' as CMAKE_SYSTEM_NAME
+# We should set it to Linux instead
+set(CMAKE_SYSTEM_NAME "Linux")

scripts/libaom/build.sh

@@ -0,0 +1,22 @@
+# libaom doesn't support building being in its root directory
+CMAKE_BUILD_DIR=aom_build_${ANDROID_ABI}
+rm -rf ${CMAKE_BUILD_DIR}
+mkdir ${CMAKE_BUILD_DIR}
+cd ${CMAKE_BUILD_DIR}
+
+cmake .. \
+ -DANDROID_PLATFORM=${ANDROID_PLATFORM} \
+ -DANDROID_ABI=${ANDROID_ABI} \
+ -DCMAKE_TOOLCHAIN_FILE=${SCRIPTS_DIR}/libaom/android.cmake \
+ -DCMAKE_INSTALL_PREFIX=${BUILD_DIR_EXTERNAL}/${ANDROID_ABI} \
+ -DCONFIG_PIC=1 \
+ -DCONFIG_AV1_ENCODER=0 \
+ -DCONFIG_RUNTIME_CPU_DETECT=0 \
+ -DENABLE_TESTS=0 \
+ -DENABLE_DOCS=0 \
+ -DENABLE_TESTDATA=0 \
+ -DENABLE_EXAMPLES=0 \
+ -DENABLE_TOOLS=0
+
+make -j${HOST_NPROC}
+make install

scripts/libaom/download.sh

@@ -0,0 +1,15 @@
+# Script to download AV1 Codec Library's source code
+
+# Exports SOURCES_DIR_libaom - path where actual sources are stored
+
+echo "Using aom master branch"
+AOM_SOURCES=aom
+if [[ ! -d "$LAME_SOURCES" ]]; then
+  git clone https://aomedia.googlesource.com/aom
+fi
+
+cd aom
+git pull origin master
+cd ..
+
+export SOURCES_DIR_libaom=$(pwd)/${AOM_SOURCES}

scripts/parse-arguments.sh

@@ -35,10 +35,10 @@ do
       shift
     ;;
     # Arguments below enable certain external libraries to build into FFmpeg
-    # --enable-libaom)
-    #   EXTERNAL_LIBRARIES+=( "libaom" )
-    #   shift
-    # ;;
+    --enable-libaom)
+      EXTERNAL_LIBRARIES+=( "libaom" )
+      shift
+    ;;
     # --enable-libdav1d)
     #   EXTERNAL_LIBRARIES+=( "libdav1d" )
     #   shift