FILE *Binfid;
h_u32 framenum = 0;
h_s32 frameformat = 0;
char filename_last[256] = "output.txt";
void vs_printf_open(char filename[], int framenum1, int format)
{
    int temp_str = 0;
    temp_str = strcmp(filename, filename_last); // strcmp返回的规律是什么？

    do
    {
        if (temp_str != 0)
        {
            Binfid = fopen(filename, "w+");
        }
        else
        {
            Binfid = fopen(filename, "a+");
        }
    } while (Binfid == NULL); // 为什么写成 do while???
    if (Binfid == NULL)
    {
        printf("this is error!\r\n");
    }
    framenum = framenum1;
    frameformat = format;
    memcpy(filename_last, filename, sizeof(char) * 256); // 保证每一帧切换时，是添加
}