안드로이드에서 NDK를 사용하여 에코 취소 컴파일

Question

내 문제는 두 장치 사이의 안드로이드에서 jni를 사용하여 반향을 취소하는 방법입니다. 나는이 링크에서 코드를 사용하려고 시도했다. Speex echo cancellation configuration 그러나 그것은 나에게 효과가 없었다! 내 프로젝트를 빌드 할 때이 코드

#include <jni.h> 
#include "speex/speex_echo.h" 
#include "speex/speex_preprocess.h" 

SpeexEchoState *st; 
SpeexPreprocessState *den; 

JNIEXPORT void JNICALL Java_speex_EchoCanceller_open 
    (JNIEnv *env, jobject jObj, jint jSampleRate, jint jBufSize, jint jTotalSize) 
{ 
    //init 
    int sampleRate=jSampleRate; 
    st = speex_echo_state_init(jBufSize, jTotalSize); 
    den = speex_preprocess_state_init(jBufSize, sampleRate); 
    speex_echo_ctl(st, SPEEX_ECHO_SET_SAMPLING_RATE, &sampleRate); 
    speex_preprocess_ctl(den, SPEEX_PREPROCESS_SET_ECHO_STATE, st); 
} 

JNIEXPORT jshortArray JNICALL Java_speex_EchoCanceller_process 
    (JNIEnv * env, jobject jObj, jshortArray input_frame, jshortArray echo_frame) 
{ 
    //create native shorts from java shorts 
    jshort *native_input_frame = (*env)->GetShortArrayElements(env, input_frame, NULL); 
    jshort *native_echo_frame = (*env)->GetShortArrayElements(env, echo_frame, NULL); 

    //allocate memory for output data 
    jint length = (*env)->GetArrayLength(env, input_frame); 
    jshortArray temp = (*env)->NewShortArray(env, length); 
    jshort *native_output_frame = (*env)->GetShortArrayElements(env, temp, 0); 

    //call echo cancellation 
    speex_echo_cancellation(st, native_input_frame, native_echo_frame, native_output_frame); 
    //preprocess output frame 
    speex_preprocess_run(den, native_output_frame); 

    //convert native output to java layer output 
    jshortArray output_shorts = (*env)->NewShortArray(env, length); 
    (*env)->SetShortArrayRegion(env, output_shorts, 0, length, native_output_frame); 

    //cleanup and return 
    (*env)->ReleaseShortArrayElements(env, input_frame, native_input_frame, 0); 
    (*env)->ReleaseShortArrayElements(env, echo_frame, native_echo_frame, 0); 
    (*env)->ReleaseShortArrayElements(env, temp, native_output_frame, 0); 

    return output_shorts; 
} 

JNIEXPORT void JNICALL Java_speex_EchoCanceller_close 
    (JNIEnv *env, jobject jObj) 
{ 
    //close 
    speex_echo_state_destroy(st); 
    speex_preprocess_state_destroy(den); 
} 

그리고 Android.mk에 내가 오류 얻을

LOCAL_PATH := $(call my-dir) 

include $(CLEAR_VARS) 

LOCAL_MODULE := SendAudio2 
LOCAL_SRC_FILES := speex.c 


include $(BUILD_SHARED_LIBRARY) 

입니다

/home/Develop/AndroidNDK/android-ndk-r9d/ndk-build all 
Android NDK: WARNING: APP_PLATFORM android-19 is larger than android:minSdkVersion 8 in ./AndroidManifest.xml  
[armeabi] Compile thumb : SendAudio2 <= speex.c 
[armeabi] SharedLibrary : libSendAudio2.so 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_open:jni/speex.c:15: error: undefined reference to 'speex_echo_state_init' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_open:jni/speex.c:16: error: undefined reference to 'speex_preprocess_state_init' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_open:jni/speex.c:17: error: undefined reference to 'speex_echo_ctl' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_open:jni/speex.c:18: error: undefined reference to 'speex_preprocess_ctl' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_process:jni/speex.c:34: error: undefined reference to 'speex_echo_cancellation' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_process:jni/speex.c:36: error: undefined reference to 'speex_preprocess_run' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_close:jni/speex.c:54: error: undefined reference to 'speex_echo_state_destroy' 
/home/Develop/AndroidNDK/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/SendAudio2/speex.o: in function Java_speex_EchoCanceller_close:jni/speex.c:55: error: undefined reference to 'speex_preprocess_state_destroy' 
collect2: ld returned 1 exit status 
make: *** [obj/local/armeabi/libSendAudio2.so] Error 1 

내가이 문제를 어떻게 해결할 수 있습니까? 감사!! 어쩌면이 같은 귀하의 Android.mk도 구축하고 libspeex.so 링크 한다