c++ - NDK：尚未声明

Question

我正在使用 Android 本机库 NDK 编译 C++ 代码，但是在尝试将g729a.h文件包含在g729_jni.cpp中时出现以下错误：

错误：

Compile++ arm    : g729_jni <= g729_jni.cpp
/usr/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -MMD -MP -MF ./obj/local/armeabi/objs/g729_jni/g729_jni.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__  -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -fno-exceptions -fno-rtti -O2 -fomit-frame-pointer -fstrict-aliasing -funswitch-loops -finline-limit=300 -I/usr/src/android-ndk-r8/sources/cxx-stl/system/include -Ijni -DANDROID -O3 -Wa,--noexecstack   -O2 -DNDEBUG -g   -I/usr/src/android-ndk-r8/platforms/android-3/arch-arm/usr/include -c  jni/g729_jni.cpp -o ./obj/local/armeabi/objs/g729_jni/g729_jni.o 


In file included from jni/g729_jni.cpp:34:
jni/g729/g729a.h:70: error: 'UWord8' has not been declared
jni/g729/g729a.h:126: error: 'UWord8' has not been declared
jni/g729_jni.cpp: In function 'jint Java_org_sipdroid_codecs_G729_open(JNIEnv*, _jobject*)':
jni/g729_jni.cpp:72: error: 'UWord8' was not declared in this scope
jni/g729_jni.cpp: In function 'jint Java_org_sipdroid_codecs_G729_encode(JNIEnv*, _jobject*, _jshortArray*, jint, _jbyteArray*, jint)':
jni/g729_jni.cpp:111: error: 'UWord8' was not declared in this scope
jni/g729_jni.cpp:111: error: expected ';' before 'serial'
jni/g729_jni.cpp:125: error: 'serial' was not declared in this scope
jni/g729_jni.cpp: In function 'jint Java_org_sipdroid_codecs_G729_decode(JNIEnv*, _jobject*, _jbyteArray*, _jshortArray*, jint)':
jni/g729_jni.cpp:156: error: cannot convert 'unsigned char*' to 'int*' for argument '2' to 'void g729a_dec_process(void*, int*, Word16*, Flag)'
make: *** [obj/local/armeabi/objs/g729_jni/g729_jni.o] Error 1

我用谷歌搜索试图找出这个错误背后的原因。由于C++是区分大小写的，如果大小写有误，就会出现这种错误。但我没有犯这种错误。

如果您有任何想法或建议，请指导我完成。

谢谢

更新：

[root@localhost sipdroid-read-only]# /usr/src/android-ndk-r8/ndk-build V=1 APP_ABI=armeabi APP_PROJECT_PATH=. obj/local/armeabi/objs/g729_jni/g729_jni.o
make: `obj/local/armeabi/objs/g729_jni/g729_jni.o' is up to date.

Answer 1

确保您的 typedef.h 类似于http://siphon.googlecode.com/svn/trunk/g729a/Headers/typedef.h

以下是我为重现您的问题而采取的步骤：

svn checkout http://sipdroid.googlecode.com/svn/trunk/ sipdroid
cd sipdroid
sed "s/^SILK/include $(CLEAR_VARS)\\nSILK/" -i jni/Android.mk

（请注意，Android.mk 在第 89 行之后需要修复）。

svn checkout http://siphon.googlecode.com/svn/trunk/ ../siphon
cp -d ../siphon/g729a/Headers/ jni/g729
wget http://pastie.org/pastes/4737332/download -O jni/g729/g729a.h
wget "http://sipdroid.googlecode.com/issues/attachment?aid=7963991223373796529&name=g729_jni.cpp&token=KHEZCoq6ZYSuV_VhsV8fC3uwsSs%3A1348058591979" -O jni/g729_jni.cpp
sed -e "s/g722_jni/g729_jni/" -i jni/Android.mk
ndk-build.cmd V=1 APP_ABI=armeabi APP_PROJECT_PATH=. obj/local/armeabi/objs/g729_jni/g729_jni.o

...并且您的文件在编译时带有一个小警告。你做了什么不同的事情？