调用jpeg库解压多张图片，第一张图片正常，第二张图片出错

Question

    int i, j,k;
    ICON_INFO *info;
    struct jpeg_decompress_struct cinfo;
    struct jpeg_error_mgr jerr;
    FILE * input_file;
    JDIMENSION num_scanlines;
    int row_stride;
    JSAMPARRAY buffer;
    unsigned char * dst_buffer;
    unsigned short *dst;
    unsigned char * src;
    /*jpeg decode for logo*/ 
    cinfo.err = jpeg_std_error(&jerr);
    jpeg_create_decompress(&cinfo);

    /* init icon */
    info = icon_info;
    j = sizeof(icon_info)/sizeof(icon_info[0]);
    printf("=======j=%d=====\n",j);
    for (i = 0; i < j; i++, info++)
    {
        printf("=======i=%d=====\n",i);
        printf(info->name);
        if ((input_file = fopen(info->name, "rb")) == NULL) {
            fprintf(stderr, "can't open %s\n",info->name);
            exit(EXIT_FAILURE);
        }

        /* Specify data source for decompression */
        jpeg_stdio_src(&cinfo, input_file);
        printf("************1\n");
        /* Read file header, set default decompression parameters */
        (void) jpeg_read_header(&cinfo, TRUE);
        printf("************2\n");
        /* Start decompressor */
        (void) jpeg_start_decompress(&cinfo);
        printf("************3\n");
        printf("cinfo.output_width:%d\n",cinfo.output_width);
        printf("cinfo.output_height:%d\n",cinfo.output_height);
        printf("cinfo.output_components:%d\n",cinfo.output_components);

        dst_buffer = malloc(cinfo.output_width*cinfo.output_height*(cinfo.output_components + 1));
        if(NULL == dst_buffer) {
            printf("failed to malloc for icon_logo.jpg \n");
            return -1;
        }
        dst = (unsigned short *)dst_buffer;
        icon_tbl[i] = (int)dst_buffer;

        row_stride = cinfo.output_width * cinfo.output_components;
        buffer = (*cinfo.mem->alloc_sarray)
            ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
        /* Process data */

        while (cinfo.output_scanline < cinfo.output_height) {
            num_scanlines = jpeg_read_scanlines(&cinfo, buffer, 1);

            //argb8888
            src = (unsigned char *)buffer[0];
            for(k=0; k<cinfo.output_width; k++) {
                *dst_buffer = *(src + 2);
                *(dst_buffer + 1) = *(src + 1);
                *(dst_buffer + 2) = *src;
                src += 3;
                dst_buffer +=3;
                *dst_buffer++ = 0xE0;
            }


#endif
        }

        /*end jpeg decode */
    }

    (void) jpeg_finish_decompress(&cinfo);
    jpeg_destroy_decompress(&cinfo);

出错是在

Answer 1

是我没有关闭之前打开的文件以及没有调用结束解压的函数才会出这个问题