Question

我发现this library名为SoundTouch-Android。

我将jni和armeabi-v7a文件夹复制到我的项目中。

转到我输入的终端jni文件夹后：

export ANDROID_NDK=~/daniele/Android/Sdk/ndk-bundle
export NDK_ROOT=$ANDROID_NDK
export PATH=${PATH}:${ANDROID_NDK}
ndk-build

这就是我得到的：

Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-14.    
Android NDK: WARNING:/home/daniele/AndroidStudioProjects/Chords2/app/jni/Android.mk:soundtouch: non-system libraries in linker flags: -lgcc    
Android NDK:     This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES    
Android NDK:     or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the    
Android NDK:     current module    
Android NDK: WARNING:/home/daniele/AndroidStudioProjects/Chords2/app/jni/Android.mk:soundtouch: non-system libraries in linker flags: -lgcc    
Android NDK:     This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES    
Android NDK:     or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the    
Android NDK:     current module    
[armeabi-v7a] Compile++ thumb: soundtouch <= soundtouch-jni.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= AAFilter.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= FIFOSampleBuffer.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= FIRFilter.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= cpu_detect_x86.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= RateTransposer.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= SoundTouch.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= TDStretch.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= BPMDetect.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= PeakFinder.cpp
[armeabi-v7a] SharedLibrary  : libsoundtouch.so
[armeabi-v7a] Install        : libsoundtouch.so => libs/armeabi-v7a/libsoundtouch.so
[armeabi] Compile++ thumb: soundtouch <= soundtouch-jni.cpp
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch-jni.cpp:133:2: error: 
      no matching function for call to 'convertInput16'
        convertInput16(ar, fBufferIn, BUFF_SIZE);
        ^~~~~~~~~~~~~~
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch-jni.cpp:58:13: note: 
      candidate function not viable: no known conversion from
      'soundtouch::SAMPLETYPE *' (aka 'short *') to 'float *' for 2nd argument
static void convertInput16(jbyte*, float*, int);
            ^
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch-jni.cpp:210:16: error: 
      no matching function for call to 'write'
                processed += write(fBufferIn, fBufferOut, nSamples * cha...
                             ^~~~~
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch-jni.cpp:56:12: note: 
      candidate function not viable: no known conversion from
      'soundtouch::SAMPLETYPE *' (aka 'short *') to 'const float *' for 1st
      argument
static int write(const float*, queue<signed char>*, int, int);
           ^
2 errors generated.

我该如何解决？

更新

我按照Dan Albert的回答中的建议修改了Application.mk后尝试重建它。现在我得到了一个不同的日志，但仍然是一个错误，我不知道如何修复。

Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-14.    
Android NDK: WARNING:/home/daniele/AndroidStudioProjects/Chords2/app/jni/Android.mk:soundtouch: non-system libraries in linker flags: -lgcc    
Android NDK:     This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES    
Android NDK:     or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the    
Android NDK:     current module    
[armeabi-v7a] Compile++ thumb: soundtouch <= soundtouch-jni.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= AAFilter.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= FIFOSampleBuffer.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= FIRFilter.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= cpu_detect_x86.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= RateTransposer.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= SoundTouch.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= TDStretch.cpp
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch/source/SoundTouch/TDStretch.cpp:72:13: warning: 
      unused variable '_scanOffsets' [-Wunused-const-variable]
const short _scanOffsets[5][24]={
            ^
1 warning generated.
[armeabi-v7a] Compile++ thumb: soundtouch <= BPMDetect.cpp
[armeabi-v7a] Compile++ thumb: soundtouch <= PeakFinder.cpp
[armeabi-v7a] SharedLibrary  : libsoundtouch.so
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch/source/SoundTouch/RateTransposer.cpp:296: error: undefined reference to 'soundtouch::InterpolateLinearFloat::InterpolateLinearFloat()'
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch/source/SoundTouch/RateTransposer.cpp:302: error: undefined reference to 'soundtouch::InterpolateShannon::InterpolateShannon()'
/home/daniele/AndroidStudioProjects/Chords2/app/jni/soundtouch/source/SoundTouch/RateTransposer.cpp:299: error: undefined reference to 'soundtouch::InterpolateCubic::InterpolateCubic()'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [/home/daniele/AndroidStudioProjects/Chords2/app/obj/local/armeabi-v7a/libsoundtouch.so] Error 1

我不太清楚它是否有用，但我会在下面发布Android.mk以便您查看：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

# *** Remember: Change -O0 into -O2 in add-applications.mk ***

LOCAL_MODULE    := soundtouch
LOCAL_SRC_FILES := soundtouch-jni.cpp soundtouch/source/SoundTouch/AAFilter.cpp  soundtouch/source/SoundTouch/FIFOSampleBuffer.cpp \
                soundtouch/source/SoundTouch/FIRFilter.cpp soundtouch/source/SoundTouch/cpu_detect_x86.cpp \
                soundtouch/source/SoundTouch/RateTransposer.cpp soundtouch/source/SoundTouch/SoundTouch.cpp \
                soundtouch/source/SoundTouch/TDStretch.cpp soundtouch/source/SoundTouch/BPMDetect.cpp soundtouch/source/SoundTouch/PeakFinder.cpp

# for native audio
LOCAL_LDLIBS    += -lgcc 
LOCAL_C_INCLUDES += $(LOCAL_PATH)/soundtouch/include
# --whole-archive -lgcc 
# for logging
LOCAL_LDLIBS    += -llog
# for native asset manager
#LOCAL_LDLIBS    += -landroid
# don't export all symbols
# added "-marm" switch to use arm instruction set instead of thumb for improved calculation performance.
LOCAL_CFLAGS += -Wall -fvisibility=hidden -I soundtouch/source/../include -D ST_NO_EXCEPTION_HANDLING -fdata-sections -ffunction-sections -marm

include $(BUILD_SHARED_LIBRARY)

Answer 1

看起来可能已经签入的代码被SOUND_TOUCH_INTEGER_SAMPLES打破了：https://github.com/VladimirKulyk/SoundTouch-Android/blob/a614c7b37b0c4d58b20e0581aadfd6a43f3a5f2d/jni/soundtouch/include/STTypes.h#L139

看起来好像是line 85。它只适用于没有浮点硬件的情况（从日志中可以看出，这对于大多数ABI来说都很好，对于arm5它只是失败了）。我建议只禁用arm5。几乎每个设备都可以做arm7。在Application.mk file中，更改APP_ABI行：

APP_ABI := armeabi-v7a

Android NDK - 编译库时出错

1 个答案: