一、項(xiàng)目結(jié)構(gòu)

jni相關(guān)的單獨(dú)放在一個(gè)文件夾內(nèi)，包括

st_stereo.h,main.cpp，這個(gè)是要進(jìn)行編譯的文件

lib下的libSTdisp.so,libStereoblur.so,前面要編譯的文件所引用的庫文件

android.mk和Application.mk

image.png

二、android.mk中相關(guān)設(shè)置

注意點(diǎn)有：

1.前面兩個(gè)庫的引用基本是固定寫法，結(jié)尾寫成

include $(PREBUILT_SHARED_LIBRARY)

2.第三個(gè)庫為main.cpp，是我們要編譯的庫，它引用其他.so庫的時(shí)候，用

LOCAL_SHARED_LIBRARIES := CLEAR_VARS

LOCAL_SHARED_LIBRARIES += STdisp

LOCAL_SHARED_LIBRARIES += Stereoblur

3.新建項(xiàng)目默認(rèn)是沒有ndk環(huán)境的，需要右鍵項(xiàng)目AndroidTools里啟用NDK環(huán)境,如果沒有這一步，項(xiàng)目是沒有obj文件夾的，之后ndk-build也不會(huì)正常編譯

Android.mk

LOCAL_PATH := $(call my-dir)

LOCAL_PREBUILT_DIR := prebuilt

include $(CLEAR_VARS)

LOCAL_MODULE := Stereoblur

LOCAL_MODULE_PATH := ./

LOCAL_SRC_FILES := $(LOCAL_PREBUILT_DIR)/lib/$(TARGET_ARCH_ABI)/libStereoblur.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := STdisp

LOCAL_MODULE_PATH := ./

LOCAL_SRC_FILES := $(LOCAL_PREBUILT_DIR)/lib/$(TARGET_ARCH_ABI)/libSTdisp.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := jniSTDualCamPreview

#LOCAL_C_INCLUDES += $(LOCAL_PATH)/include $(LOCAL_PATH)/$(LOCAL_PREBUILT_DIR)/include

LOCAL_SRC_FILES := main.cpp

LOCAL_SHARED_LIBRARIES := CLEAR_VARS

LOCAL_SHARED_LIBRARIES += STdisp

LOCAL_SHARED_LIBRARIES += Stereoblur

LOCAL_LDLIBS += -lstdc++ -llog -ldl -lGLESv2 -lm -ljnigraphics

include $(BUILD_SHARED_LIBRARY)

Application.mk

APP_STL := gnustl_static

APP_CPPFLAGS := -frtti -fexceptions

#APP_ABI := armeabi-v7a arm64-v8a

APP_ABI := armeabi-v7a

#APP_ABI := armeabi-v7a x86 arm64-v8a

APP_PLATFORM := android-18

#忽略warning，防止編譯不通過

APP_CFLAGS += -Wno-error=format-security

三、main.cpp文件

這就是一個(gè)普通的.cpp文件，所以很多寫法要遵守cpp的格式來寫，比如頭文件的引入，方法的重復(fù)定義報(bào)的錯(cuò)，都需要一修改

#include

#include

#include

#include "prebuilt/include/st_stereo.h"

#include "license.h"

#include

//#ifndef _Included_stereo_engine

#define _Included_stereo_engine

#ifndef _Included_com_example_nodspdualcampreview_JNIUtils

#define _Included_com_example_nodspdualcampreview_JNIUtils

#if defined (__cplusplus)

extern "C" {

#endif

void readYUVFile(char *fileName, int image_width, int image_height,

unsigned char *dataPointer) {

int yuv_len = image_width * (image_height + image_height / 2);

FILE *file = fopen(fileName, "rb");

fread(dataPointer, 1, yuv_len, file);

fclose(file);

}

int main(int argc, char *argv[]) {

initLicense(license);

void *handle = NULL;

stStereoSize_t inLeft_size;

stStereoSize_t inRight_size;

stStereoSize_t out_size;

inLeft_size.width = 1440;

inLeft_size.height = 1080;

inLeft_size.width_stride = 1536;

inLeft_size.height_stride = 1088;

inRight_size.width = 1440;

inRight_size.height = 1080;

inRight_size.width_stride = 1536;

inRight_size.height_stride = 1088;

out_size.width = 1440;

out_size.height = 1080;

out_size.width_stride = 1536;

out_size.height_stride = 1088;

handle = initStereoEngine(inLeft_size, inRight_size, out_size);

if (handle == NULL) {

return -1;

}

stCalibParam_t Param;

FILE *pFile = fopen("/sdcard/preview/OTP_buffer.bin", "rb");

const int length = 512;

unsigned char buffer[length];

fread(buffer, 1, length, pFile);

fclose(pFile);

Param.OTP_buffer = buffer;

Param.OTP_size = length;

int calib_result = 0;

calib_result = initCalibrateParam(handle, Param);

if (calib_result != 0) {

return -1;

}

int left_length = inLeft_size.width_stride * inLeft_size.height_stride

* 1.5;

int right_length = inRight_size.width_stride * inRight_size.height_stride

* 1.5;

int out_length = out_size.width_stride * out_size.height_stride * 1.5;

unsigned char *left_image = new unsigned char[left_length];

unsigned char *right_image = new unsigned char[right_length];

unsigned char *out_image = new unsigned char[out_length];

stStereoEnv_t cam_info;

int blur_state[1];

readYUVFile("/sdcard/preview/left.yuv", inLeft_size.width_stride,

inLeft_size.height_stride, left_image);

readYUVFile("/sdcard/preview/right.yuv", inRight_size.width_stride,

inRight_size.height_stride, right_image);

FILE *para = fopen("/sdcard/preview/camInfo.bin", "rb");

fread(&cam_info, sizeof(stStereoEnv_t), 1, para);

fclose(para);

for (int i = 0; i < 100; i++) {

int stereoBlur_result = 0;

stereoBlur_result = stereoBlur(handle, left_image, right_image,

out_image, 0, 0, 1, cam_info, blur_state);

if (stereoBlur_result != 0) {

return -1;

}

}

FILE *out_file = fopen("/sdcard/preview/out.yuv", "w");

if (out_file == NULL) {

} else {

fwrite(out_image, sizeof(unsigned char), 1536 * 1088 * 3 / 2, out_file);

}

delete[] left_image;

delete[] right_image;

delete[] out_image;

fclose(out_file);

releaseStereoEngine(handle);

return 0;

}

//自己的jni方法，上面必須引用

JNIEXPORT jstring JNICALL Java_com_example_nodspdualcampreview_JNIUtils_getString(

JNIEnv *env, jobject obj) {

return env->NewStringUTF("Hello World shit!");

}

JNIEXPORT void JNICALL Java_com_example_nodspdualcampreview_JNIUtils_preview(

JNIEnv *env, jobject obj) {

//調(diào)用上面設(shè)定的方法

main(1,NULL);

}

#if defined (__cplusplus)

}

#endif

#endif

四、將main.cpp編譯成.so文件

這一步比較簡單，命令行進(jìn)入jni文件夾下，運(yùn)行ndk-build即可，期間可能會(huì)遇到各種問題，百度解決即可，此時(shí)的主要問題一般是cpp文件編譯的問題

1.遇到一個(gè)編譯waning問題

在Application.mk中加入這個(gè)即可

忽略warning，防止編譯不通過

APP_CFLAGS += -Wno-error=format-security

五、至于java引用編譯成功的.so文件，就不用記了

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