堆栈损坏

Question

这是我的功能，它说

  

变量cinfo周围的堆栈已损坏。

并且它表示问题在第551行，这是此发布代码中的最后一行。

struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr       jerr;

FILE*      pOutFile;     //Target file 
int        nSampsPerRow; //Physical row width in image buffer 
JSAMPARRAY jsmpArray;    //Pixel RGB buffer for JPEG file

cinfo.err = jpeg_std_error(&jerr); //Use default error handling (ugly!)

jpeg_create_compress(&cinfo);

if ((pOutFile = fopen(csJpeg, "wb")) == NULL)
{
    *pcsMsg = "Cannot open ";
    *pcsMsg += csJpeg;
    jpeg_destroy_compress(&cinfo);
    return FALSE;
}

jpeg_stdio_dest(&cinfo, pOutFile);

LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)hDib;

cinfo.image_width      = lpbi->biWidth;  //Image width and height, in pixels 
cinfo.image_height     = lpbi->biHeight;
cinfo.input_components = 3;              //Color components per pixel
                                         //(RGB_PIXELSIZE - see jmorecfg.h)
cinfo.in_color_space   = JCS_RGB;        //Colorspace of input image

jpeg_set_defaults(&cinfo);

jpeg_set_quality(&cinfo,
                 nQuality, //Quality: 0-100 scale
                 TRUE);    //Limit to baseline-JPEG values

jpeg_start_compress(&cinfo, TRUE);

//JSAMPLEs per row in output buffer
nSampsPerRow = cinfo.image_width * cinfo.input_components; 

//Allocate array of pixel RGB values
jsmpArray = (*cinfo.mem->alloc_sarray)
            ((j_common_ptr) &cinfo,
             JPOOL_IMAGE,
             nSampsPerRow,
             cinfo.image_height);

if (DibToSamps(hDib,
               nSampsPerRow,
               cinfo,
               jsmpArray,
               pcsMsg))
{
    //Write the array of scan lines to the JPEG file
    (void)jpeg_write_scanlines(&cinfo,
                               jsmpArray,
                               cinfo.image_height);
}

jpeg_finish_compress(&cinfo); //Always finish

fclose(pOutFile);

jpeg_destroy_compress(&cinfo); //Free resources

if (*pcsMsg != "")
    return FALSE;

else
    return TRUE;
}

堆栈跟踪：＆gt; WindowBitmap.exe！CBitmapFile :: JpegFromDib（void * hDib，int nQuality，ATL :: CStringT＆gt;＆gt; csJpeg，ATL :: CStringT＆gt;＆gt; * pcsMsg）第551行+ 0x28字节C ++

错误消息：运行时检查失败＃2 - 变量'cinfo'周围的堆栈已损坏。 pcsMsg定义：      CString * pcsMsg

Answer 1

jpeg_destroy_compress(&cinfo);

释放自动变量的内存，当cinfo超出范围时，该变量将被第二次释放。

  

函数jpeg_destroy_compress（）将释放并释放与压缩对象关联的所有内存。