support scte-35 parsing

[flavioribeiro]

suggested by @tretelny.

Need to check with @futzu if we could use his lib.

[flavioribeiro]

https://github.com/Comcast/scte35-go

[flavioribeiro]

https://github.com/futzu/cuei

[futzu]

Flavio,
of course.
If I can do anything to help, just let me know.

[futzu]

I see you already have asitis parsing the stream, all you really would have to do is make a cuei.Cue instance and pass it the payload from a SCTE-35 packet like this

import 
	"github.com/futzu/cuei"


var cue cuei.Cue
cue.Decode(payload)

Then you can access whatever you need with dot notation like
cue.Command.PTS

cue.Show() will print the Cue in JSON

cue.Show()

type Cue struct {
	InfoSection
	Command     SpliceCommand
	Descriptors []SpliceDescriptor `json:",omitempty"`
	Packet      *PacketData        `json:",omitempty"`
}

All the SCTE35 Splice Commands (Splice Insert, Time Signal etc) are consolidated into the SpliceCommand struct
and all the Descriptors are consolidated into SpliceDescriptor. No interfaces needed. it makes it much easier to get to vars in the struct.

[futzu]

I put some examples up.

[flavioribeiro]

thanks, @futzu !

[futzu]

I was looking at how you were doing things with the close captions, and I added something similar.

https://github.com/futzu/cuei#use-cuei-with-another-mpegts-stream-parser--demuxer