pick up PR#3261 (#3599)

1. switch from ant to gradle
2. use clang as the default toolchain
Co-authored-by: alexcohn <[email protected]>

.gitignore

@@ -57,3 +57,9 @@ codec/build/iOS/dec/welsdec/build/
 # editor files
 *~
 
+# android gradle integration – regenerated when the project is opened in Android Studio
+/.idea/
+/.gradle/
+/gradle/
+/gradlew.bat
+/local.properties

build.gradle

@@ -0,0 +1,30 @@
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.3'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+apply plugin: 'idea'
+
+idea.module {
+    excludeDirs -= file("build")
+    excludeDirs += file(".idea")
+    excludeDirs += file("gradle")
+    sourceDirs += file("build")
+    sourceDirs += file("codec")
+    testSourceDirs += file("test")
+    testSourceDirs += file("autotest")
+    resourceDirs += file("res")
+    resourceDirs += file("docs")
+}

build/platform-android.mk

@@ -5,7 +5,9 @@ SHAREDLIBSUFFIX = so
 SHAREDLIBSUFFIXFULLVER=$(SHAREDLIBSUFFIX)
 SHAREDLIBSUFFIXMAJORVER=$(SHAREDLIBSUFFIX)
 SHLDFLAGS =
-NDKLEVEL = 12
+
+NDK_TOOLCHAIN_VERSION = clang
+
 ifeq ($(ARCH), arm)
   ifneq ($(APP_ABI), armeabi)
     CFLAGS += -march=armv7-a -mfloat-abi=softfp
@@ -32,48 +34,49 @@ endif
 ifndef NDKROOT
 $(error NDKROOT is not set)
 endif
+
 ifndef TARGET
 $(error TARGET is not set)
 endif
 
-TOOLCHAINPREFIX = $(shell NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_PREFIX APP_ABI=$(APP_ABI))
-TOOLCHAIN_NAME = $(shell NDK_TOOLCHAIN_VERSION= NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_NAME APP_ABI=$(APP_ABI))
-GCC_TOOLCHAIN_PATH = $(shell dirname $(TOOLCHAINPREFIX) | xargs dirname )
-
-SYSROOT = $(NDKROOT)/platforms/android-$(NDKLEVEL)/arch-$(ARCH)
-CXX = $(TOOLCHAINPREFIX)g++
-CC = $(TOOLCHAINPREFIX)gcc
-AR = $(TOOLCHAINPREFIX)ar
-CFLAGS += -DANDROID_NDK -fpic --sysroot=$(SYSROOT) -MMD -MP
-ifeq ($(USE_STACK_PROTECTOR), Yes)
-CFLAGS += -fstack-protector-all
+ifeq ($(NDKLEVEL),)
+NDKLEVEL = $(TARGET:android-%=%)
 endif
-CFLAGS += -isystem $(NDKROOT)/sysroot/usr/include -isystem $(NDKROOT)/sysroot/usr/include/$(TOOLCHAIN_NAME) -D__ANDROID_API__=$(NDKLEVEL)
+
+CFLAGS += -DANDROID_NDK -fpic -MMD -MP -fstack-protector-all
 CXXFLAGS += -fno-rtti -fno-exceptions
-LDFLAGS += --sysroot=$(SYSROOT)
 SHLDFLAGS = -Wl,--no-undefined -Wl,-z,relro -Wl,-z,now -Wl,-soname,lib$(PROJECT_NAME).so
 UTSHLDFLAGS = -Wl,-soname,libut.so
 
 ifeq ($(NDK_TOOLCHAIN_VERSION), clang)
-  HOST_OS = $(shell uname -s | tr [A-Z] [a-z])
-  LLVM_INSTALL_DIR = $(NDKROOT)/toolchains/llvm/prebuilt/$(HOST_OS)-x86_64/bin
-  CC = $(LLVM_INSTALL_DIR)/clang
-  CXX = $(LLVM_INSTALL_DIR)/clang++
+  LLVM_INSTALL_DIR = $(wildcard $(NDKROOT)/toolchains/llvm/prebuilt/*/bin)
 
   ifeq ($(ARCH), arm)
-    TARGET_NAME = armv7-none-linux-androideabi
+    TARGET_NAME = armv7a-linux-androideabi
   else ifeq ($(ARCH), arm64)
-    TARGET_NAME = aarch64-none-linux-android
+    TARGET_NAME = aarch64-linux-android
   else ifeq ($(ARCH), x86)
-    TARGET_NAME = i686-none-linux-android
+    TARGET_NAME = i686-linux-android
   else ifeq ($(ARCH), x86_64)
-    TARGET_NAME = x86_64-none-linux-android
+    TARGET_NAME = x86_64-linux-android
   else
     $(error "does not support this arch now!")
   endif
 
-  CFLAGS += -target $(TARGET_NAME)
-  LDFLAGS += -target $(TARGET_NAME) -gcc-toolchain $(GCC_TOOLCHAIN_PATH)
+  CC = $(LLVM_INSTALL_DIR)/$(TARGET_NAME)$(NDKLEVEL)-clang
+  CXX = $(LLVM_INSTALL_DIR)/$(TARGET_NAME)$(NDKLEVEL)-clang++
+  AR = $(LLVM_INSTALL_DIR)/llvm-ar
+  SYSROOT = $(LLVM_INSTALL_DIR)/../sysroot
+else
+  TOOLCHAINPREFIX = $(shell NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_PREFIX APP_ABI=$(APP_ABI))
+  TOOLCHAIN_NAME = $(shell NDK_TOOLCHAIN_VERSION= NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_NAME APP_ABI=$(APP_ABI))
+  GCC_TOOLCHAIN_PATH = $(shell dirname $(TOOLCHAINPREFIX) | xargs dirname )
+  SYSROOT = $(NDKROOT)/platforms/android-$(NDKLEVEL)/arch-$(ARCH)
+
+  CXX = $(TOOLCHAINPREFIX)g++
+  CC = $(TOOLCHAINPREFIX)gcc
+  AR = $(TOOLCHAINPREFIX)ar
+  CFLAGS += -isystem $(NDKROOT)/sysroot/usr/include -isystem $(NDKROOT)/sysroot/usr/include/$(TOOLCHAIN_NAME) -D__ANDROID_API__=$(NDKLEVEL) --sysroot=$(SYSROOT)
 endif
 
 # background reading: https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#unwinding
@@ -82,22 +85,9 @@ LDFLAGS += -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libunwind.a
 ifneq ($(findstring /,$(CXX)),$(findstring \,$(CXX)))
 ifneq ($(CXX),$(wildcard $(CXX)))
 ifneq ($(CXX).exe,$(wildcard $(CXX).exe))
-$(error Compiler not found, bad NDKROOT or ARCH?)
-endif
+$(error Compiler not found, bad NDKROOT or ARCH? $(CXX))
 endif
 endif
-
-ifeq ($(NDK_TOOLCHAIN_VERSION), clang)
-STL_INCLUDES = \
-    -I$(NDKROOT)/sources/cxx-stl/llvm-libc++/include \
-    -I$(NDKROOT)/sources/cxx-stl/llvm-libc++abi/include
-STL_LIB = \
-    $(NDKROOT)/sources/cxx-stl/llvm-libc++/libs/$(APP_ABI)/libc++_static.a
-else
-STL_INCLUDES = \
-    -I$(NDKROOT)/sources/cxx-stl/stlport/stlport
-STL_LIB = \
-    $(NDKROOT)/sources/cxx-stl/stlport/libs/$(APP_ABI)/libstlport_static.a
 endif
 
 GTEST_INCLUDES = $(STL_INCLUDES)
@@ -109,18 +99,26 @@ MODULE_LDFLAGS = $(STL_LIB)
 ifeq (./,$(SRC_PATH))
 binaries: decdemo encdemo
 
+NDK_BUILD = $(NDKROOT)/ndk-build APP_ABI=$(APP_ABI) APP_PLATFORM=$(TARGET) NDK_TOOLCHAIN_VERSION=$(NDK_TOOLCHAIN_VERSION) V=$(V:Yes=1)
+
 decdemo: libraries
-	cd ./codec/build/android/dec && $(NDKROOT)/ndk-build -B NDK_TOOLCHAIN_VERSION=$(NDK_TOOLCHAIN_VERSION) APP_ABI=$(APP_ABI) APP_PLATFORM=$(TARGET) && android update project -t $(TARGET) -p . && ant debug
+	$(NDK_BUILD) -C codec/build/android/dec -B
+	./gradlew test-dec:assembleDebug
 
 encdemo: libraries
-	cd ./codec/build/android/enc && $(NDKROOT)/ndk-build -B NDK_TOOLCHAIN_VERSION=$(NDK_TOOLCHAIN_VERSION) APP_ABI=$(APP_ABI) APP_PLATFORM=$(TARGET) && android update project -t $(TARGET) -p . && ant debug
+	$(NDK_BUILD) -C codec/build/android/enc -B
+	./gradlew test-enc:assembleDebug
 
 clean_Android: clean_Android_dec clean_Android_enc
 
 clean_Android_dec:
-	-cd ./codec/build/android/dec && $(NDKROOT)/ndk-build APP_ABI=$(APP_ABI) clean && ant clean
+	-$(NDK_BUILD) -C codec/build/android/dec clean
+	-./gradlew test-dec:clean
+
 clean_Android_enc:
-	-cd ./codec/build/android/enc && $(NDKROOT)/ndk-build APP_ABI=$(APP_ABI) clean && ant clean
+	-$(NDK_BUILD) -C codec/build/android/enc clean
+	-./gradlew test-enc:clean
+
 else
 clean_Android:
 	@:

codec/build/android/dec/.gitignore

@@ -0,0 +1 @@
+build

codec/build/android/dec/build.gradle

@@ -0,0 +1,12 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 29
+
+    sourceSets.main {
+        manifest.srcFile "AndroidManifest.xml"
+        res.srcDir "res"
+        java.srcDir "src"
+        jniLibs.srcDir "libs"
+    }
+}

codec/build/android/dec/src/com/wels/dec/WelsDecTest.java

@@ -140,7 +140,7 @@ public boolean onKeyDown (int keyCode, KeyEvent event) {
   static {
     try {
       System.loadLibrary ("openh264");
-      System.loadLibrary ("stlport_shared");
+      System.loadLibrary ("c++_shared");
       System.loadLibrary ("welsdecdemo");
       Log.v (TAG, "Load libwelsdec successful");
     } catch (Exception e) {

codec/build/android/enc/.gitignore

@@ -0,0 +1 @@
+build

codec/build/android/enc/build.gradle

@@ -0,0 +1,12 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 29
+
+    sourceSets.main {
+        manifest.srcFile "AndroidManifest.xml"
+        res.srcDir "res"
+        java.srcDir "src"
+        jniLibs.srcDir "libs"
+    }
+}

codec/build/android/enc/src/com/wels/enc/WelsEncTest.java

@@ -161,7 +161,7 @@ public native void  DoEncoderAutoTest (String cfgFileName, String layerFileName,
   static {
     try {
       System.loadLibrary ("openh264");
-      System.loadLibrary ("stlport_shared");
+      System.loadLibrary ("c++_shared");
       System.loadLibrary ("welsencdemo");
       Log.v (TAG, "Load libwelsencdemo.so successful");
     } catch (Exception e) {