Kurento:OpenCV模块中的链接库

我正在编写一个与Kurento Media Server配套的OpenCV模块。 我正在使用lib curl从URL读取文件

我的守则如下：

#include<curl/curl.h>

size_t write_data(char *ptr, size_t size, size_t nmemb, void *userdata)
{
    vector<uchar> *stream = (vector<uchar>*)userdata;
    size_t count = size * nmemb;
    stream->insert(stream->end(), ptr, ptr + count);
    return count;
}

Mat curlImg(const char *img_url, int timeout=10)
{
    vector<uchar> stream;
    CURL *curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL, img_url);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); 
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    return imdecode(stream, -1);
}

Mat image = curlImg(link);

generate_code (
   MODELS ${CMAKE_CURRENT_SOURCE_DIR}/interface
   SERVER_STUB_DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/implementation/objects
   SERVER_IMPL_LIB_EXTRA_LIBRARIES ${CURL_LIBRARIES}
)

2

SET(requiredlibs)

FIND_PACKAGE(CURL)
IF(CURL_FOUND)
    INCLUDE_DIRECTORIES(${CURL_INCLUDE_DIR})
    SET(requiredlibs ${requiredlibs} ${CURL_LIBRARIES} )
ELSE(CURL_FOUND)
    MESSAGE(FATAL_ERROR "Could not find the CURL library and development files.")
ENDIF(CURL_FOUND)

target_link_libraries (curl)

SET(${CURL_LIBRARIES} )

3

SET(requiredlibs)

FIND_PACKAGE(CURL)
IF(CURL_FOUND)
    INCLUDE_DIRECTORIES(${CURL_INCLUDE_DIR})
    SET(requiredlibs ${requiredlibs} ${CURL_LIBRARIES} )
ELSE(CURL_FOUND)
    MESSAGE(FATAL_ERROR "Could not find the CURL library and development files.")
ENDIF(CURL_FOUND)

target_link_libraries (curl)

SET(${CURL_LIBRARIES} )

---

在主文件夹project

CMakeLists.txt

中完成其他要求的地方，您需要添加：

pkg_check_modules(CURL REQUIRED curl)

然后在文件夹

src/server

中，您需要修改CMakeLists.txt文件，如下所示：

#include<curl/curl.h>

size_t write_data(char *ptr, size_t size, size_t nmemb, void *userdata)
{
    vector<uchar> *stream = (vector<uchar>*)userdata;
    size_t count = size * nmemb;
    stream->insert(stream->end(), ptr, ptr + count);
    return count;
}

Mat curlImg(const char *img_url, int timeout=10)
{
    vector<uchar> stream;
    CURL *curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL, img_url);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); 
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    return imdecode(stream, -1);
}

Mat image = curlImg(link);

generate_code (
   MODELS ${CMAKE_CURRENT_SOURCE_DIR}/interface
   SERVER_STUB_DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/implementation/objects
   SERVER_IMPL_LIB_EXTRA_LIBRARIES ${CURL_LIBRARIES}
)

---

在主文件夹project

CMakeLists.txt

中完成其他要求的地方，您需要添加：

pkg_check_modules(CURL REQUIRED curl)

然后在文件夹

src/server

中，您需要修改CMakeLists.txt文件，如下所示：

#include<curl/curl.h>

size_t write_data(char *ptr, size_t size, size_t nmemb, void *userdata)
{
    vector<uchar> *stream = (vector<uchar>*)userdata;
    size_t count = size * nmemb;
    stream->insert(stream->end(), ptr, ptr + count);
    return count;
}

Mat curlImg(const char *img_url, int timeout=10)
{
    vector<uchar> stream;
    CURL *curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL, img_url);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); 
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
    curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    return imdecode(stream, -1);
}

Mat image = curlImg(link);

generate_code (
   MODELS ${CMAKE_CURRENT_SOURCE_DIR}/interface
   SERVER_STUB_DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/implementation/objects
   SERVER_IMPL_LIB_EXTRA_LIBRARIES ${CURL_LIBRARIES}
)

我试过了，但没有成功

我必须在主文件夹项目的

CMakeLists.txt

中将

curl

更改为

libcurl

：

pkg_check_modules(CURL REQUIRED libcurl)

我试过了，但没有成功

我必须在主文件夹项目的

CMakeLists.txt

中将

curl

更改为

libcurl

：

pkg_check_modules(CURL REQUIRED libcurl)

---

你可以找到一个target_link_libries的例子。你现在是如何链接它们的？我已经尝试过了：target_link_库（curl）和SET（${curl_库}）都不起作用。试着用你尝试过的内容和你的

CMakeList.txt

文件（至少相关部分）@santocadenas编辑你的问题，我不知道如何链接它们，因此我没有在问题中添加它。通常我给出的可执行文件名在这里不起作用。你可以找到一个target_link_libries的例子。你现在如何链接它们？我已经尝试过了：target_link_库（curl）和SET（${curl_libraries}）都不起作用。试着用你尝试过的内容和

CMakeList.txt

文件编辑你的问题（至少是相关部分）@santoscadenas，我不知道如何链接它们，因此我没有在问题中添加它。通常我给出的可执行文件名在这里可能不起作用。