teletext
-- import "github.com/boomlinde/teletext"
A Go library for generating teletext data suitable for
raspi-teletext. Contains data
structures and routines suitable for building pages from the ground up or
generating them using .tti files.
Usage
func Ham
func Ham(data []byte) []byte
8:4 hamming encodes the input bytes
func Parity
func Parity(data []byte) []byte
Generates parity bit for 7 bit data
type Header
type Header struct {
Page int // Page number
Row int // Row number
}
Teletext line header.
func (Header) GetHeader
func (h Header) GetHeader() *Header
Returns a pointer to the line header
func (Header) Serialize
func (h Header) Serialize() []byte
func (Header) SetPage
func (h Header) SetPage(page int)
Sets the page number of a line
type Line
type Line interface {
Serialize() []byte
GetHeader() *Header
SetPage(int)
}
Interface for line types
type OutputLine
type OutputLine struct {
Header
Data []byte // Line data
}
Output line type
func (OutputLine) Serialize
func (o OutputLine) Serialize() []byte
type Page
type Page []Line
func ConvertTTI
func ConvertTTI(title string, data []byte) Page
Converts .tti file data to the internal page format
func ConvertTTV
func ConvertTTV(title string, pagenumber int, data []byte) Page
Converts 971 format .ttv file data to the internal page format
func (Page) Len
func (p Page) Len() int
Satisfies sorting interface
func (Page) Less
func (p Page) Less(i, j int) bool
Satisfies sorting interface
func (Page) Serialize
func (p Page) Serialize() []byte
Serializes a teletext page
func (Page) Swap
func (p Page) Swap(i, j int)
Satisfies sorting interface
type PageHeader
type PageHeader struct {
Header
Title string // Page title
}
Page header line type
func (PageHeader) Serialize
func (p PageHeader) Serialize() []byte