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ExRTCDataChannel.cxx
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ExRTCDataChannel.cxx
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// https://www.w3.org/TR/webrtc/#dom-rtcdatachannel
#include "ExRTCDataChannel.h"
#include "ExMessageEvent.h"
ExRTCDataChannel::ExRTCDataChannel(rtc::scoped_refptr<webrtc::DataChannelInterface> obj)
: m_obj(obj)
, m_callback_onopen(nullptr)
, m_callback_onerror(nullptr)
, m_callback_onclose(nullptr)
, m_callback_onmessage(nullptr)
, m_callback_onbufferedamountlow(nullptr)
// supported values: "blob" and "arraybuffer"
// default value: "blob"
, m_binaryType("blob")
, m_bufferedAmountLowThreshold(8192)
{
m_obj->RegisterObserver(this);
}
ExRTCDataChannel::~ExRTCDataChannel()
{
m_obj->UnregisterObserver();
m_obj = nullptr;
}
const std::string ExRTCDataChannel::label() const
{
return m_obj->label();
}
bool ExRTCDataChannel::ordered() const
{
return m_obj->ordered();
}
RTC_nullable_ushort ExRTCDataChannel::maxPacketLifeTime() const
{
return m_obj->maxRetransmitTime();
}
RTC_nullable_ushort ExRTCDataChannel::maxRetransmits() const
{
return m_obj->maxRetransmits();
}
const std::string ExRTCDataChannel::protocol() const
{
return m_obj->protocol();
}
bool ExRTCDataChannel::negotiated() const
{
return m_obj->negotiated();
}
RTC_nullable_ushort ExRTCDataChannel::id() const
{
return m_obj->id();
}
const std::string& ExRTCDataChannel::priority() const
{
RTC_DEBUG_ERROR("Not implemented");
return kStringEmpty;
}
const std::string ExRTCDataChannel::readyState() const
{
switch (m_obj->state()) {
case webrtc::DataChannelInterface::DataState::kConnecting:
return kRTCDataChannelStateConnecting;
case webrtc::DataChannelInterface::DataState::kOpen:
return kRTCDataChannelStateOpen;
case webrtc::DataChannelInterface::DataState::kClosing:
return kRTCDataChannelStateClosing;
case webrtc::DataChannelInterface::DataState::kClosed:
return kRTCDataChannelStateClosed;
}
return kStringEmpty;
}
uint64_t ExRTCDataChannel::bufferedAmount() const
{
return m_obj->buffered_amount();
}
uint64_t ExRTCDataChannel::bufferedAmountLowThreshold() const
{
return m_bufferedAmountLowThreshold;
}
const std::string& ExRTCDataChannel::binaryType() const
{
return m_binaryType;
}
bool ExRTCDataChannel::setBufferedAmountLowThreshold(unsigned long newVal)
{
m_bufferedAmountLowThreshold = static_cast<uint64_t>(newVal);
return true;
}
bool ExRTCDataChannel::send(const Buffer* data, bool binary /*= true*/)
{
if (data && data->ptr() && data->size()) {
rtc::CopyOnWriteBuffer _data(reinterpret_cast<const uint8_t *>(data->ptr()), data->size());
webrtc::DataBuffer buffer(_data, binary);
return m_obj->Send(buffer);
}
return false;
}
bool ExRTCDataChannel::setBinaryType(const std::string& newVal)
{
if (newVal.compare("blob") == 0 || newVal.compare("arraybuffer") == 0) {
m_binaryType = newVal;
return true;
}
return false;
}
void ExRTCDataChannel::close()
{
m_obj->Close();
}
void ExRTCDataChannel::OnStateChange()
{
switch (m_obj->state()) {
case webrtc::DataChannelInterface::DataState::kClosed:
if (m_callback_onclose) {
m_callback_onclose();
}
break;
case webrtc::DataChannelInterface::DataState::kOpen:
if (m_callback_onopen) {
m_callback_onopen();
}
break;
case webrtc::DataChannelInterface::DataState::kClosing:
case webrtc::DataChannelInterface::DataState::kConnecting:
default:
break;
}
}
void ExRTCDataChannel::OnMessage(const webrtc::DataBuffer& buffer)
{
if (m_callback_onmessage) {
m_callback_onmessage(std::make_shared<ExMessageEvent>(
std::make_shared<Buffer>(buffer.data.data(), buffer.data.size()), buffer.binary));
}
}
void ExRTCDataChannel::OnBufferedAmountChange(uint64_t previous_amount)
{
// bufferedamountlow: The RTCDataChannel object's bufferedAmount decreases from above its bufferedAmountLowThreshold to less than or equal to its bufferedAmountLowThreshold.
if (m_callback_onbufferedamountlow) {
if (previous_amount > m_bufferedAmountLowThreshold && m_obj->buffered_amount() <= m_bufferedAmountLowThreshold) {
m_callback_onbufferedamountlow();
}
}
}