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// +build !js
package webrtc
import (
"sync/atomic"
"github.com/pion/interceptor"
"github.com/pion/interceptor/pkg/nack"
"github.com/pion/interceptor/pkg/report"
"github.com/pion/rtp"
)
// RegisterDefaultInterceptors will register some useful interceptors.
// If you want to customize which interceptors are loaded, you should copy the
// code from this method and remove unwanted interceptors.
func RegisterDefaultInterceptors(mediaEngine *MediaEngine, interceptorRegistry *interceptor.Registry) error {
if err := ConfigureNack(mediaEngine, interceptorRegistry); err != nil {
return err
}
if err := ConfigureRTCPReports(interceptorRegistry); err != nil {
return err
}
return nil
}
// ConfigureRTCPReports will setup everything necessary for generating Sender and Receiver Reports
func ConfigureRTCPReports(interceptorRegistry *interceptor.Registry) error {
reciver, err := report.NewReceiverInterceptor()
if err != nil {
return err
}
sender, err := report.NewSenderInterceptor()
if err != nil {
return err
}
interceptorRegistry.Add(reciver)
interceptorRegistry.Add(sender)
return nil
}
// ConfigureNack will setup everything necessary for handling generating/responding to nack messages.
func ConfigureNack(mediaEngine *MediaEngine, interceptorRegistry *interceptor.Registry) error {
generator, err := nack.NewGeneratorInterceptor()
if err != nil {
return err
}
responder, err := nack.NewResponderInterceptor()
if err != nil {
return err
}
mediaEngine.RegisterFeedback(RTCPFeedback{Type: "nack"}, RTPCodecTypeVideo)
mediaEngine.RegisterFeedback(RTCPFeedback{Type: "nack", Parameter: "pli"}, RTPCodecTypeVideo)
interceptorRegistry.Add(responder)
interceptorRegistry.Add(generator)
return nil
}
type interceptorToTrackLocalWriter struct{ interceptor atomic.Value } // interceptor.RTPWriter }
func (i *interceptorToTrackLocalWriter) WriteRTP(header *rtp.Header, payload []byte) (int, error) {
if writer, ok := i.interceptor.Load().(interceptor.RTPWriter); ok && writer != nil {
return writer.Write(header, payload, interceptor.Attributes{})
}
return 0, nil
}
func (i *interceptorToTrackLocalWriter) Write(b []byte) (int, error) {
packet := &rtp.Packet{}
if err := packet.Unmarshal(b); err != nil {
return 0, err
}
return i.WriteRTP(&packet.Header, packet.Payload)
}
func createStreamInfo(id string, ssrc SSRC, payloadType PayloadType, codec RTPCodecCapability, webrtcHeaderExtensions []RTPHeaderExtensionParameter) interceptor.StreamInfo {
headerExtensions := make([]interceptor.RTPHeaderExtension, 0, len(webrtcHeaderExtensions))
for _, h := range webrtcHeaderExtensions {
headerExtensions = append(headerExtensions, interceptor.RTPHeaderExtension{ID: h.ID, URI: h.URI})
}
feedbacks := make([]interceptor.RTCPFeedback, 0, len(codec.RTCPFeedback))
for _, f := range codec.RTCPFeedback {
feedbacks = append(feedbacks, interceptor.RTCPFeedback{Type: f.Type, Parameter: f.Parameter})
}
return interceptor.StreamInfo{
ID: id,
Attributes: interceptor.Attributes{},
SSRC: uint32(ssrc),
PayloadType: uint8(payloadType),
RTPHeaderExtensions: headerExtensions,
MimeType: codec.MimeType,
ClockRate: codec.ClockRate,
Channels: codec.Channels,
SDPFmtpLine: codec.SDPFmtpLine,
RTCPFeedback: feedbacks,
}
}
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