I was able to successfully pass in APP_CFLAGS via eclipse through via the settings' ndk-build command as
ndk-build -B NDK_DEBUG=1 APP_CFLAGS=-DTEST
I have now switched to Android studio and was trying to do it directly in the makefile with the following, but its not taking:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
APP_CFLAGS += -DTEST
LOCAL_SRC_FILES:= test.cpp
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
It builds fine, but my TEST variable is never set in the C++ code.
How can I add it to the makefile?
Or, How can I add it to Android Studio project settings?
You could use LOCAL_CFLAGS for C/C++ code additional flags or LOCAL_CPPFLAGS for C++ code in Android build system.
LOCAL_CFLAGS := -DTEST=1
My Application.mk is set to build arm as well as x86 shared libraries:
APP_ABI :- armeabi-v7a x86
I have prebuilt openssl static libraries:
libcrypto_v7a.a
libcrypto_x86.a
libssl_v7a.a
libssl_x86.a
These files have been copied to jni/inc directory:
Would appreciate your help in setting up Android.mk such that it picks up proper library to link with:
LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_v7a -lssl_v7a
or
LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_x86 -lssl_x86
Perhaps there is a $(ARCH) kind of variable defined that I could use to my advantage:
LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_$(ARCH) -lssl_$(ARCH)
What about using ifeq and TARGET_ARCH?
LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/
ifeq ($(TARGET_ARCH),arm)
LOCAL_LDLIBS += -lcrypto_v7a -lssl_v7a
else
ifeq ($(TARGET_ARCH),x86)
LOCAL_LDLIBS += -lcrypto_x86 -lssl_x86
endif
endif
Another alternative is:
MY_LDLIBS_arm := -lcrypto_v7a -lssl_v7a
MY_LDLIBS_x86 := -lcrypto_x86 -lssl_x86
MY_LDLIBS_mips := ...
LOCAL_LDLIBS += $(MY_LDLIBS_$(TARGET_ARCH))
Which is easier to read and write.
I am trying to compile the opus audio codec (http://www.opus-codec.org/downloads/) for use in an Android application. I am using Android NDK (release 6) to compile my libraries. Up to now, the native C libraries that I had to compile for my application has been pretty straightforward and I have been able to base my Android.mk files in jni mostly on tutorials or other examples. However, the compilation of Opus looks to be somewhat more complex. The tar.gz archive contains a solution file for compiling the libraries for Windows and it also contains some Makefiles for a standard Unix implementation, but translating these into an Android.mk makefile for use by the Android NDK is a bit of a challenge.
I have searched, but have been unable to find an online version for the Android makefile to compile libopus. Can someone perhaps link me to such a makefile? Alternatively, I might be missing something simpler? Is it perhaps possible to use Automake or some kind of converter to maybe generate the Android.mk file for me from the unix makefile that is already included in the tar.gz?
The following is the Android.mk makefile that eventually worked for me. I hope this can help someone else too in future. Do take note that in the unix makefile included in the Opus Archive, the decision of whether to use the fixed or float silk sources is defined as an "ifdef" whereas here I am using "fixed". (To use "float" would be simple - simply update the paths "silk/fixed" to point to "silk/float" and update the CFLAGS.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
MY_MODULE_DIR := opus
LOCAL_MODULE := $(MY_MODULE_DIR)
LOCAL_SRC_FILES := \
$(subst $(ROOT_DIR)/$(MY_MODULE_DIR)/,,$(wildcard $(ROOT_DIR)/$(MY_MODULE_DIR)/src/*.c*)) \
$(subst $(ROOT_DIR)/$(MY_MODULE_DIR)/,,$(wildcard $(ROOT_DIR)/$(MY_MODULE_DIR)/celt/*.c*)) \
$(subst $(ROOT_DIR)/$(MY_MODULE_DIR)/,,$(wildcard $(ROOT_DIR)/$(MY_MODULE_DIR)/silk/*.c*)) \
$(subst $(ROOT_DIR)/$(MY_MODULE_DIR)/,,$(wildcard $(ROOT_DIR)/$(MY_MODULE_DIR)/silk/fixed/*.c*))
LOCAL_LDLIBS := -lm -llog
LOCAL_C_INCLUDES := \
$(ROOT_DIR)/$(MY_MODULE_DIR)/include \
$(ROOT_DIR)/$(MY_MODULE_DIR)/silk \
$(ROOT_DIR)/$(MY_MODULE_DIR)/silk/fixed \
$(ROOT_DIR)/$(MY_MODULE_DIR)/celt
LOCAL_CFLAGS := -DNULL=0 -DSOCKLEN_T=socklen_t -DLOCALE_NOT_USED -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64
LOCAL_CFLAGS += -Drestrict='' -D__EMX__ -DOPUS_BUILD -DFIXED_POINT -DUSE_ALLOCA -DHAVE_LRINT -DHAVE_LRINTF -O3 -fno-math-errno
LOCAL_CPPFLAGS := -DBSD=1
LOCAL_CPPFLAGS += -ffast-math -O3 -funroll-loops
include $(BUILD_STATIC_LIBRARY)
IMPORTANT EDIT
The images might not be up to date but the work has been tested on below versions:
opus-1.1
opus-1.1.2
An updated version (works for opus-1.1.2 ) of #praneetloke's solution. A kind of different approach with some extras.
First of all below is my structure to use (I intended to use more libraries, so I put opus in its own sub-folder. )
Secondly I have a root Android.mk file and one another inside the folder opus-1.1.2 .
Here is the root Android.mk file:
LOCAL_PATH := $(call my-dir)
OPUS_DIR := opus-1.1.2
include $(OPUS_DIR)/Android.mk
include $(CLEAR_VARS)
LOCAL_MODULE := codec
LOCAL_SRC_FILES := Opus_jni.cpp
LOCAL_CFLAGS := -DNULL=0
LOCAL_LDLIBS := -lm -llog
LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(OPUS_DIR)/include
LOCAL_SHARED_LIBRARIES := opus
include $(BUILD_SHARED_LIBRARY)
Android.mk file inside the opus-1.1.2 folder is below:
#Backing up previous LOCAL_PATH so it does not screw with the root Android.mk file
LOCAL_PATH_OLD := $(LOCAL_PATH)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
#include the .mk files
include $(LOCAL_PATH)/celt_sources.mk
include $(LOCAL_PATH)/silk_sources.mk
include $(LOCAL_PATH)/opus_sources.mk
LOCAL_MODULE := opus
#fixed point sources
SILK_SOURCES += $(SILK_SOURCES_FIXED)
#ARM build
CELT_SOURCES += $(CELT_SOURCES_ARM)
SILK_SOURCES += $(SILK_SOURCES_ARM)
LOCAL_SRC_FILES := \
$(CELT_SOURCES) $(SILK_SOURCES) $(OPUS_SOURCES)
LOCAL_LDLIBS := -lm -llog
LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/silk \
$(LOCAL_PATH)/silk/fixed \
$(LOCAL_PATH)/celt
LOCAL_CFLAGS := -DNULL=0 -DSOCKLEN_T=socklen_t -DLOCALE_NOT_USED -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64
LOCAL_CFLAGS += -Drestrict='' -D__EMX__ -DOPUS_BUILD -DFIXED_POINT=1 -DDISABLE_FLOAT_API -DUSE_ALLOCA -DHAVE_LRINT -DHAVE_LRINTF -DAVOID_TABLES
LOCAL_CFLAGS += -w -std=gnu99 -O3 -fno-strict-aliasing -fprefetch-loop-arrays -fno-math-errno
LOCAL_CPPFLAGS := -DBSD=1
LOCAL_CPPFLAGS += -ffast-math -O3 -funroll-loops
include $(BUILD_SHARED_LIBRARY)
#Putting previous LOCAL_PATH back here
LOCAL_PATH := $(LOCAL_PATH_OLD)
This is how it looks like inside opus-1.1.2 folder:
The only touch to the original sources is addition of an Android.mk file. Nothing removed.
This way I can use and update opus just like a separate library.
Here is the extras for those who wants to compile and use opus in android; Wrapper source, partially:
#include <jni.h>
#include <android/log.h>
#include <opus.h>
/* Header for class net_abcdefgh_opustrial_codec_Opus */
#ifndef _Included_net_abcdefgh_opustrial_codec_Opus
#define _Included_net_abcdefgh_opustrial_codec_Opus
#define TAG "Opus_JNI"
#define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, TAG,__VA_ARGS__)
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG , TAG,__VA_ARGS__)
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO , TAG,__VA_ARGS__)
#define LOGW(...) __android_log_print(ANDROID_LOG_WARN , TAG,__VA_ARGS__)
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR , TAG,__VA_ARGS__)
#ifdef __cplusplus
extern "C" {
#endif
JNIEXPORT jint JNICALL Java_net_abcdefgh_opustrial_codec_Opus_open
(JNIEnv *env, jobject thiz){
...
return error;
}
JNIEXPORT jint JNICALL Java_net_abcdefgh_opustrial_codec_Opus_decode
(JNIEnv * env, jobject thiz, jbyteArray jencoded, jint jencodedOffset, jint jencodedLength, jbyteArray jpcm, jint jpcmOffset, jint jframeSize) {
...
return decodedSize;
}
JNIEXPORT jint JNICALL Java_net_abcdefgh_opustrial_codec_Opus_encode
(JNIEnv * env, jobject thiz, jbyteArray jpcm, jint jpcmOffset, jint jpcmLength, jbyteArray jencoded, jint jencodedOffset) {
...
return encodedSize;
}
JNIEXPORT void JNICALL Java_net_abcdefgh_opustrial_codec_Opus_close
(JNIEnv *env, jobject thiz){
...
}
#ifdef __cplusplus
}
#endif
#endif
Application.mk file (optional)
APP_ABI := all # mips, armeabi, armeabi-v7a, x86 etc. builds
Thanks to #Stanley, I was able to create a shared library successfully by tweaking his solution a bit. I don't know yet if there is an advantage of having a static library vs. a shared library. All I know is I need a shared library for the JNI wrapper. This is what I have. Note the compiler flags for fixed point. Without those the compilation will fail for fixed point mode.
First copy the celt_sources.mk, silk_sources.mk and opus_sources.mk from the opus source tarball to your jni directory. Bringing these files into your Android.mk file will add different variables which you can use to include source files based on the type of the build. This is what the opus build process does as well.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
#include the .mk files
include celt_sources.mk
include silk_sources.mk
include opus_sources.mk
MY_MODULE_DIR := opus
LOCAL_MODULE := $(MY_MODULE_DIR)
#fixed point sources
SILK_SOURCES += $(SILK_SOURCES_FIXED)
#ARM build
CELT_SOURCES += $(CELT_SOURCES_ARM)
SILK_SOURCES += $(SILK_SOURCES_ARM)
LOCAL_SRC_FILES := \
$(CELT_SOURCES) $(SILK_SOURCES) $(OPUS_SOURCES)
LOCAL_LDLIBS := -lm -llog
LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/silk \
$(LOCAL_PATH)/silk/fixed \
$(LOCAL_PATH)/celt
LOCAL_CFLAGS := -DNULL=0 -DSOCKLEN_T=socklen_t -DLOCALE_NOT_USED -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64
LOCAL_CFLAGS += -Drestrict='' -D__EMX__ -DOPUS_BUILD -DFIXED_POINT=1 -DDISABLE_FLOAT_API -DUSE_ALLOCA -DHAVE_LRINT -DHAVE_LRINTF -O3 -fno-math-errno
LOCAL_CPPFLAGS := -DBSD=1
LOCAL_CPPFLAGS += -ffast-math -O3 -funroll-loops
#build a shared library not a static one like in Stanley's solution
include $(BUILD_SHARED_LIBRARY)
Here's my project structure for the opus library.
EDIT: Just use the accepted answer's solution above, the original link is dead plus it's basically the same as the accepted answer at the time I answered.
Here is one, maybe a little outdated (it used opus 0.9.14):
https://github.com/haxar/mangler/blob/master/android/jni/Android.mk
You're to write some JNI wrappers after getting the library to compile, though...
I've searched a lot of topics about linking libpng to my android ndk project but I've found right answer for my problem and I hope somebody will help me.
This is hierarchy of my project:
jni
different_cpp_files
different_hpp_files
Android.mk
libpng
different_cpp_files
different_hpp_files
Android.mk
Android.mk in libpng folder:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LS_C=$(subst $(1)/,,$(wildcard $(1)/*.c))
LOCAL_MODULE := png
LOCAL_SRC_FILES := \
$(filter-out example.c pngtest.c,$(call LS_C,$(LOCAL_PATH)))
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
LOCAL_EXPORT_LDLIBS := -lz
include $(BUILD_STATIC_LIBRARY)
I suppose that everything is right here..
Android.mk in jni folder:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LS_CPP=$(subst $(1)/,,$(wildcard $(1)/*.cpp))
LOCAL_MODULE := pacman
LOCAL_CFLAGS := -Wno-psabi
LOCAL_SRC_FILES := $(call LS_CPP,$(LOCAL_PATH))
LOCAL_LDLIBS := -landroid -llog -lEGL -lGLESv1_CM -lOpenSLES
LOCAL_STATIC_LIBRARIES := android_native_app_glue png
include $(BUILD_SHARED_LIBRARY)
$(call import-module,android/native_app_glue)
$(call import-module,libpng)
The last line shows that I got libpng like native_app_glue lib(in the directory of android-ndk sources) Now I want to compile libpng from my project. What I need to change in Android.mk file?
i've got another way for you:
Download all files from here and paste it into a new folder anywhere on your system:
https://github.com/julienr/libpng-android
go into the folder and run:
./build.sh
You will get an libpng.a file in [YOUR_FOLDER]/obj/local/armeabi/libpng.a
Copy this file into:
[YOUR_ANDROID_NDK_FOLDER]/platforms/[ALL_FOLDERS_IN_HERE]/arch-arm/usr/lib/
now you can use libpng in all your projects with the simple line:
LOCAL_LDLIBS += -lpng
you only have to include this in your cpp's:
#include <png.h>
Have fun!
I am doing NDK profiling for my project using android-ndk-profiler-3.1. I have made changes in Android.mk as follows...
LOCAL_PATH := $(call my-dir)
-include android-ndk-profiler.mk
include $(CLEAR_VARS)
# Module name -------------------------------------------------------
LOCAL_CFLAGS += -O3
TARGET_ARCH_ABI :=armeabi
LOCAL_CFLAGS := -pg
LOCAL_STATIC_LIBRARIES := andprof
LOCAL_LDLIBS += -llog
LOCAL_MODULE := libitv
include $(BUILD_SHARED_LIBRARY)
Application.mk is as follows...
APP_ABI := armeabi
APP_PLATFORM := android-10
I have called monstartup("itv.so"); function in the beginning of the native code and moncleanup(); function in the stop method. And gmon.out file is created successfully.And then I have pasted gmon.out in
D:\android\android-ndk-r6-windows\android-ndk-r6\toolchains\arm-linux-androideabi-4.4.3\prebuilt\windows\bin directory.
But when I am trying to read gmon.out using the following command...
D:\android\android-ndk-r6-windows\android-ndk-r6\toolchains\arm-linux-androideab
i-4.4.3\prebuilt\windows\bin>arm-linux-androideabi-gprof D:\InternetTV_FD_Canvas
\libs\armeabi\libitv.so > out.txt
This Error is showing...
arm-linux-androideabi-gprof: file `D:\InternetTV_FD_Canvas\libs\armeabi\libitv.so'
has no symbols
I am not able to make out why this error is coming even I have done everything fine.
Can anybody please help me.
Any help will be appreciated.
Thanks in Advance.
The NDK build process creates 2 libraries, one with symbols and one stripped without. You install the stripped, symbol-less library in your APK, but you need to use the unstripped version with gprof. If you run:
arm-linux-androideabi-gprof D:\InternetTV_FD_Canvas\obj\local\armeabi\libitv.so
... then that should be the correct library.