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tvct.go
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tvct.go
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package psip
import (
"github.com/mh-orange/ts"
)
type TVCT struct {
*Table
}
func newTVCT(payload []byte) VCT {
return &TVCT{&Table{payload}}
}
func (vct *TVCT) NumChannelsInSection() int {
return int(ts.Uimsbf8(vct.Data()[0]))
}
func (vct *TVCT) Channels() []Channel {
numChannels := vct.NumChannelsInSection()
channels := make([]Channel, numChannels)
offset := 1
for i := 0; i < numChannels; i++ {
channels[i] = channel(vct.Data()[offset:])
offset += channels[i].Length()
}
return channels
}
func (vct *TVCT) channelLength() int {
length := 0
for _, channel := range vct.Channels() {
length += channel.Length()
}
return length
}
func (vct *TVCT) AdditionalDescriptorsLength() uint16 {
start := 1 + vct.channelLength()
end := start + 2
return ts.Uimsbf16(vct.Data()[start:end], 10)
}