mirror of
https://github.com/livekit/livekit.git
synced 2026-05-14 16:15:25 +00:00
Raja Subramanian
102 lines
2.9 KiB
Go
102 lines
2.9 KiB
Go
// Copyright 2023 LiveKit, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rtc
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import (
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"fmt"
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"time"
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"github.com/livekit/livekit-server/pkg/rtc/datatrack"
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"github.com/livekit/livekit-server/pkg/rtc/types"
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"github.com/livekit/protocol/livekit"
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"github.com/livekit/protocol/logger"
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)
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var _ types.DataDownTrack = (*DataDownTrack)(nil)
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var _ types.DataTrackSender = (*DataDownTrack)(nil)
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type DataDownTrackParams struct {
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Logger logger.Logger
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SubscriberID livekit.ParticipantID
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PublishDataTrack types.DataTrack
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Handle uint16
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Transport types.DataTrackTransport
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}
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type DataDownTrack struct {
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params DataDownTrackParams
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logger logger.Logger
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createdAt int64
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}
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func NewDataDownTrack(params DataDownTrackParams) (*DataDownTrack, error) {
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d := &DataDownTrack{
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params: params,
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createdAt: time.Now().UnixNano(),
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}
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d.logger = params.Logger.WithValues("name", d.Name(), "handle", d.Handle())
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if err := d.params.PublishDataTrack.AddDataDownTrack(d); err != nil {
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d.logger.Warnw("could not add data down track", err)
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return nil, err
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}
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d.logger.Infow("created data down track")
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return d, nil
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}
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func (d *DataDownTrack) Close() {
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d.logger.Infow("closing data down track")
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d.params.PublishDataTrack.DeleteDataDownTrack(d.SubscriberID())
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}
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func (d *DataDownTrack) Handle() uint16 {
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return d.params.Handle
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}
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func (d *DataDownTrack) PublishDataTrack() types.DataTrack {
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return d.params.PublishDataTrack
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}
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func (d *DataDownTrack) ID() livekit.TrackID {
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return d.params.PublishDataTrack.ID()
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}
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func (d *DataDownTrack) Name() string {
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return d.params.PublishDataTrack.Name()
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}
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func (d *DataDownTrack) SubscriberID() livekit.ParticipantID {
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// add `createdAt` to ensure repeated subscriptions from same subscriber to same publisher does not collide
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return livekit.ParticipantID(fmt.Sprintf("%s:%d", d.params.SubscriberID, d.createdAt))
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}
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func (d *DataDownTrack) WritePacket(data []byte, packet *datatrack.Packet, _arrivalTime int64) {
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forwardedPacket := *packet
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forwardedPacket.Handle = d.params.Handle
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buf, err := forwardedPacket.Marshal()
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if err != nil {
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d.logger.Warnw("could not marshal data track message", err)
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return
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}
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if err := d.params.Transport.SendDataTrackMessage(buf); err != nil {
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d.logger.Warnw("could not send data track message", err)
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}
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}
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func (d *DataDownTrack) UpdateSubscriptionOptions(subscriptionOptions *livekit.DataTrackSubscriptionOptions) {
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// DT-TODO
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}
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