Fix typos in multiple comments

Author: knowmost

Diff for: api_js.go

@@ -6,7 +6,7 @@
 
 package webrtc
 
-// API bundles the global funcions of the WebRTC and ORTC API.
+// API bundles the global functions of the WebRTC and ORTC API.
 type API struct {
 	settingEngine *SettingEngine
 }

Diff for: datachannel.go

@@ -236,7 +236,7 @@ func (d *DataChannel) onOpen() {
 }
 
 // OnDial sets an event handler which is invoked when the
-// peer has been dialed, but before said peer has responsed
+// peer has been dialed, but before said peer has responded
 func (d *DataChannel) OnDial(f func()) {
 	d.mu.Lock()
 	d.dialHandlerOnce = sync.Once{}

Diff for: datachannel_js.go

@@ -115,7 +115,7 @@ func (d *DataChannel) SendText(s string) (err error) {
 // Before calling Detach you have to enable this behavior by calling
 // webrtc.DetachDataChannels(). Combining detached and normal data channels
 // is not supported.
-// Please reffer to the data-channels-detach example and the
+// Please refer to the data-channels-detach example and the
 // pion/datachannel documentation for the correct way to handle the
 // resulting DataChannel object.
 func (d *DataChannel) Detach() (datachannel.ReadWriteCloser, error) {

Diff for: examples/insertable-streams/README.md

@@ -4,7 +4,7 @@ This example modifies the video with a single-byte XOR cipher before sending, an
 decrypts in Javascript.
 
 insertable-streams allows the browser to process encoded video. You could implement
-E2E encyption, add metadata or insert a completely different video feed!
+E2E encryption, add metadata or insert a completely different video feed!
 
 ## Instructions
 ### Create IVF named `output.ivf` that contains a VP8 track

Diff for: interceptor.go

@@ -127,7 +127,7 @@ func ConfigureCongestionControlFeedback(mediaEngine *MediaEngine, interceptorReg
 	return nil
 }
 
-// ConfigureSimulcastExtensionHeaders enables the RTP Extenison Headers needed for Simulcast
+// ConfigureSimulcastExtensionHeaders enables the RTP Extension Headers needed for Simulcast
 func ConfigureSimulcastExtensionHeaders(mediaEngine *MediaEngine) error {
 	if err := mediaEngine.RegisterHeaderExtension(RTPHeaderExtensionCapability{URI: sdp.SDESMidURI}, RTPCodecTypeVideo); err != nil {
 		return err

Diff for: internal/util/util.go

@@ -18,12 +18,12 @@ const (
 // Use global random generator to properly seed by crypto grade random.
 var globalMathRandomGenerator = randutil.NewMathRandomGenerator() // nolint:gochecknoglobals
 
-// MathRandAlpha generates a mathmatical random alphabet sequence of the requested length.
+// MathRandAlpha generates a mathematical random alphabet sequence of the requested length.
 func MathRandAlpha(n int) string {
 	return globalMathRandomGenerator.GenerateString(n, runesAlpha)
 }
 
-// RandUint32 generates a mathmatical random uint32.
+// RandUint32 generates a mathematical random uint32.
 func RandUint32() uint32 {
 	return globalMathRandomGenerator.Uint32()
 }

Diff for: peerconnection.go

@@ -1326,7 +1326,7 @@ func runIfNewReceiver(
 	return false
 }
 
-// configurepRTPReceivers opens knows inbound SRTP streams from the RemoteDescription
+// configureRTPReceivers opens knows inbound SRTP streams from the RemoteDescription
 func (pc *PeerConnection) configureRTPReceivers(isRenegotiation bool, remoteDesc *SessionDescription, currentTransceivers []*RTPTransceiver) { //nolint:gocognit
 	incomingTracks := trackDetailsFromSDP(pc.log, remoteDesc.parsed)
 

Diff for: peerconnection_media_test.go

@@ -1606,7 +1606,7 @@ func TestPeerConnection_Simulcast_RTX(t *testing.T) {
 	assert.Greater(t, rtxPacketRead.Load(), int32(0), "no rtx packet read")
 }
 
-// Everytime we receieve a new SSRC we probe it and try to determine the proper way to handle it.
+// Everytime we receive a new SSRC we probe it and try to determine the proper way to handle it.
 // In most cases a Track explicitly declares a SSRC and a OnTrack is fired. In two cases we don't
 // know the SSRC ahead of time
 // * Undeclared SSRC in a single media section (https://github.com/pion/webrtc/issues/880)

Diff for: sdp.go

@@ -85,7 +85,7 @@ func trackDetailsFromSDP(log logging.LeveledLogger, s *sdp.SessionDescription) (
 		tracksInMediaSection := []trackDetails{}
 		rtxRepairFlows := map[uint64]uint64{}
 
-		// Plan B can have multiple tracks in a signle media section
+		// Plan B can have multiple tracks in a single media section
 		streamID := ""
 		trackID := ""