Функция std::copy устарела?

struct CLASS::SdpOpaque {using Vector = std::vector<uint8_t>; Vector data; Vector::iterator pos;};
 
int СLASS::func_name(void *opaque, uint8_t *buf, int size) /*noexcept*/
{
    assert(opaque);
    assert(buf);
    auto octx = static_cast<CLASS::SdpOpaque*>(opaque);
 
    if (octx->pos == octx->data.end()) {
        return 0;
    }
 
    auto dist = static_cast<int>(std::distance(octx->pos, octx->data.end()));
    auto count = std::min(size, dist);
 
    std::copy(octx->pos, octx->pos + count, buf);
    octx->pos += count;
 
    return count;
}

std::copy(octx->pos, octx->pos + count, buf);

int СLASS::func_name2(AVFormatContext **pctx, const char *data, AVDictionary **options) /*noexcept*/
{
    assert(pctx);
    *pctx = avformat_alloc_context();
    assert(*pctx);
 
    const size_t avioBufferSize = 4096;
    auto avioBuffer = static_cast<uint8_t*>(av_malloc(avioBufferSize));
    auto opaque = new CLASS::SdpOpaque();
 
    opaque->data = CLASS::SdpOpaque::Vector(data, data + strlen(data));
    opaque->pos = opaque->data.begin();
    
    auto pbctx = avio_alloc_context(avioBuffer, avioBufferSize, 0, opaque, func_name/*(opaque, avioBuffer, avioBufferSize)*/, nullptr, nullptr);
    assert(pbctx);
 
    (*pctx)->pb = pbctx;
 
    auto infmt = av_find_input_format("sdp");
 
    return avformat_open_input(pctx, "memory.sdp", infmt, options);
}