我正在尝试实现一种结构以保留二进制数据。像这样:

struct Buffer {
    int size_;
    int capacity = 1000000;
    int beg_index, end_index;
    char data_[1000000];
} buffer_audio[3];


还有一个将二进制数据写入缓冲区的函数:

int writing_bufer(Buffer buffers, const char *data, int nbytes) {
    if (nbytes == 0) return 0;

    int capacity = buffers.capacity;
    int bytes_to_write = std::min(nbytes, capacity - buffers.size_);

    if (bytes_to_write <= capacity - buffers.end_index)
    {

        memcpy(buffers.data_ + buffers.end_index, data, bytes_to_write);
        buffers.end_index += bytes_to_write;
        if (buffers.end_index == capacity) buffers.end_index = 0;
    }
    else { return 0; }

    buffers.size_ += bytes_to_write;
    return bytes_to_write;
}


但是问题是..每次我运行此例程时,都会删除beg_indexend_index的值。并且memcpy将覆盖。
例程:

void buffering_mem(char* chunk,int size_chunk, int close_file, int client, int total_size){

    int check_bytes = writing_bufer(buffer_audio[client], chunk, size_chunk);
    //other code

}

最佳答案

int writing_bufer(Buffer buffers, const char *data, int nbytes)


应该

int writing_bufer(Buffer& buffers, const char *data, int nbytes)


您将缓冲区复制到函数中,并填充了本地缓冲区,然后销毁了它们。

关于c++ - 保持值(value),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/32584298/

10-12 22:34