/
Demuxer.go
82 lines (70 loc) · 2.05 KB
/
Demuxer.go
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// Copyright 2015 CANAL+ Group
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package parser
import (
"strings"
"errors"
)
type Demuxer interface {
Open(path string) error
GetTracks(tracks *[]*Track) error
Close()
ExtractChunk(tracks *[]*Track, isLive bool) bool
}
type DemuxerConstructor func() Demuxer
var demuxerConstructors map[string]DemuxerConstructor
func fileConstructor() Demuxer {
return new(FFMPEGDemuxer)
}
func dashConstructor() Demuxer {
return new(DASHDemuxer)
}
func smoothConstructor() Demuxer {
return new(SmoothDemuxer)
}
/* Initialise specifics for each demuxer interface */
func InitialiseDemuxers() error {
demuxerConstructors = make(map[string]DemuxerConstructor)
demuxerConstructors["file"] = fileConstructor
demuxerConstructors["dash"] = dashConstructor
demuxerConstructors["smooth"] = smoothConstructor
err := FFMPEGInitialise()
return err
}
func GetAuthorizedProtocols() []string {
keys := make([]string, 0, len(demuxerConstructors))
for k := range demuxerConstructors {
keys = append(keys, k)
}
return keys
}
func extractProto(path string) string {
var i int
for i = 0; i < len(path); i++ {
if path[i] == ':' {
break
}
}
return path[:i]
}
/* Open a file from a path and initialize a demuxer structure */
func OpenDemuxer(path string) (Demuxer, error) {
var demux Demuxer
proto := extractProto(path)
if demuxerConstructors[proto] == nil {
return nil, errors.New("Unknown protocol for '" + path + "'")
}
demux = demuxerConstructors[proto]()
return demux, demux.Open(strings.Replace(path, proto + "://", "", 1))
}