81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/**
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* Copyright (c) 2019 Paul-Louis Ageneau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#ifndef RTC_DATA_CHANNEL_H
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#define RTC_DATA_CHANNEL_H
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#include "channel.hpp"
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#include "common.hpp"
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#include "reliability.hpp"
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#include <type_traits>
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namespace rtc {
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namespace impl {
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struct DataChannel;
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struct PeerConnection;
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} // namespace impl
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class RTC_CPP_EXPORT DataChannel final : private CheshireCat<impl::DataChannel>, public Channel {
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public:
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DataChannel(impl_ptr<impl::DataChannel> impl);
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~DataChannel() override;
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optional<uint16_t> stream() const;
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optional<uint16_t> id() const;
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string label() const;
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string protocol() const;
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Reliability reliability() const;
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bool isOpen(void) const override;
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bool isClosed(void) const override;
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size_t maxMessageSize() const override;
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void close(void) override;
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bool send(message_variant data) override;
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bool send(const byte *data, size_t size) override;
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template <typename Buffer> bool sendBuffer(const Buffer &buf);
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template <typename Iterator> bool sendBuffer(Iterator first, Iterator last);
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private:
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using CheshireCat<impl::DataChannel>::impl;
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};
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template <typename Buffer> std::pair<const byte *, size_t> to_bytes(const Buffer &buf) {
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using T = typename std::remove_pointer<decltype(buf.data())>::type;
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using E = typename std::conditional<std::is_void<T>::value, byte, T>::type;
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return std::make_pair(static_cast<const byte *>(static_cast<const void *>(buf.data())),
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buf.size() * sizeof(E));
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}
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template <typename Buffer> bool DataChannel::sendBuffer(const Buffer &buf) {
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auto [bytes, size] = to_bytes(buf);
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return send(bytes, size);
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}
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template <typename Iterator> bool DataChannel::sendBuffer(Iterator first, Iterator last) {
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size_t size = 0;
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for (Iterator it = first; it != last; ++it)
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size += it->size();
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binary buffer(size);
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byte *pos = buffer.data();
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for (Iterator it = first; it != last; ++it) {
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auto [bytes, len] = to_bytes(*it);
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pos = std::copy(bytes, bytes + len, pos);
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}
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return send(std::move(buffer));
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}
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} // namespace rtc
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#endif
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