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dcsctp: Add public API for BufferedAmountLow

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This adds native support for the RTCDataChannel properties:
https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/bufferedAmount
https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/bufferedAmountLowThreshold

And the RTCDataChannel event:
https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/onbufferedamountlow

The old callback, NotifyOutgoingMessageBufferEmpty, is deprecated as it
didn't work very well. It will not be triggered and will be removed
as soon as all users of it are gone. There is a new callback,
OnTotalBufferedAmountLow, that serves the same purpose but also allows
setting an arbitrary limit when it should be triggered (See
DcSctpOptions::total_buffered_amount_low_threshold).

Bug: webrtc:12794
Change-Id: Ic1c92f174eff8a1acda0b5fd3dcc45bd1cfa2704
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/219691
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34144}
This commit is contained in:
Victor Boivie
2021-05-20 19:34:18 +02:00
committed by WebRTC LUCI CQ
parent bd9031bf22
commit 236ac50628
15 changed files with 247 additions and 37 deletions
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4
net/dcsctp/socket/dcsctp_socket.h
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@ -93,7 +93,9 @@ class DcSctpSocket : public DcSctpSocketInterface {
SocketState state() const override;
const DcSctpOptions& options() const override { return options_; }
void SetMaxMessageSize(size_t max_message_size) override;
size_t buffered_amount(StreamID stream_id) const override;
size_t buffered_amount_low_threshold(StreamID stream_id) const override;
void SetBufferedAmountLowThreshold(StreamID stream_id, size_t bytes) override;
// Returns this socket's verification tag, or zero if not yet connected.
VerificationTag verification_tag() const {
return tcb_ != nullptr ? tcb_->my_verification_tag() : VerificationTag(0);