av/container/mts/pes/helpers.go

/*
DESCRIPTIONS
  helpers.go provides general codec related helper functions.

AUTHORS
  Saxon A. Nelson-Milton <saxon@ausocean.org>

LICENSE
  Copyright (C) 2019 the Australian Ocean Lab (AusOcean).

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License
  in gpl.txt.  If not, see http://www.gnu.org/licenses.
*/

package pes

import "errors"

// Stream types AKA stream IDs as per ITU-T Rec. H.222.0 / ISO/IEC 13818-1 [1], tables 2-22 and 2-34.
const (
	H264SID  = 27
	H265SID  = 36
	MJPEGSID = 136
	JPEGSID = 137
	PCMSID   = 192
	ADPCMSID = 193
)

// SIDToMIMEType will return the corresponding MIME type for passed stream ID.
func SIDToMIMEType(id int) (string, error) {
	switch id {
	case H264SID:
		return "video/h264", nil
	case H265SID:
		return "video/h265", nil
	case MJPEGSID:
		return "video/x-motion-jpeg", nil
	case JPEGSID:
		return "image/jpeg", nil
	case PCMSID:
		return "audio/pcm", nil
	case ADPCMSID:
		return "audio/adpcm", nil
	default:
		return "", errors.New("unknown stream ID")
	}
}