psip

README

TVCT

Property	Number of Bits	Format	Byte Offset
table_id	8	0xC8	0
section_syntax_indicator	1	'1'	1
private_indicator	1	'1'	1
reserved	2	'11'	1
section_length	12	uimsbf	1-2
transport_stream_id	16	uimsbf	3-4
reserved	2	'11'	5
version_number	5	uimsbf	5
current_next_indicator	1	bslbf	5
section_number	8	uimsbf	6
last_section_number	8	uimsbf	7
protocol_version	8	uimsbf	8
num_channels_in_section	8	uimsbf	9
channels	N * sizeof(channel)	[]channel	10
reserved	6	'111111'	10 + sizeof(channels)
additional_descriptors_length	10	uimsbf	10 + sizeof(channels)
additional_descriptors	N * sizeof(descriptor)	[]descriptor	12 + sizeof(channels)
CRC_32	32	rpchof	section_length - 4

Channel

Property	Number of Bits	Format	Byte Offset
short_name	112	uimsbf	0-13
reserved	4	'1111'	14
major_channel_number	10	uimsbf	14-15
minor_channel_number	10	uimsbf	15-16
modulation_mode	8	uimsbf	17
carrier_frequency	32	uimsbf	18-21
channel_TSID	16	uimsbf	22-23
program_number	16	uimsbf	24-25
ETM_location	2	uimsbf	26
access_controlled	1	bslbf	26
hidden	1	bslbf	26
reserved	2	'11'	26
hide_guide	1	bslbf	26
reserved	3	'111'	26-27
service_type	6	uimsbf	27
source_id	16	uimsbf	28-29
reserved	6	'111111'	30
descriptors_length	10	uimsbf	30-31
descriptors	N * sizeof(descriptor)	[]descriptor	32

Documentation

Index

• Constants
• Variables
• type CVCT
• type Channel
• type DSControl
  • func (dsc DSControl) DayOfMonth() int
  • func (dsc DSControl) Hour() int
  • func (dsc DSControl) Status() bool
• type MGT
• type PSIPHandler
• type STT
  • func (s *STT) DaylightSaving() DSControl
  • func (s *STT) GPSOffset() uint8
  • func (s *STT) SystemTime() time.Time
• type TVCT
  • func (vct *TVCT) AdditionalDescriptorsLength() uint16
  • func (vct *TVCT) Channels() []Channel
  • func (vct *TVCT) NumChannelsInSection() int
• type Table
  • func (t *Table) Data() []byte
  • func (t *Table) ProtocolVersion() uint8
• type TableInfo
  • func (t TableInfo) Descriptors() []psi.Descriptor
  • func (t TableInfo) DescriptorsLength() int
  • func (t TableInfo) Length() int
  • func (t TableInfo) PID() uint16
  • func (t TableInfo) TableLength() int
  • func (t TableInfo) Type() uint16
  • func (t TableInfo) Version() uint8
• type Tables
• type VCT

Constants

const (
	// BasePID is the PID for all ATSC PSIP tables
	BasePID     = uint16(0x1FFB)
	MGTTableID  = uint8(0xC7)
	TVCTTableID = uint8(0xC8)
	CVCTTableID = uint8(0xC9)
	SVCTTableID = uint8(0xDA)
)

const (
	MODULATION_8VSB = 0x04
)

Variables

var (
	// returned when expected T-VCT packet is not found when
	// reading TS packets.
	ErrVCTNotFound = errors.New("No T-VCT was found while reading TS")

	// returned when a Terrerstrial VCT cannot be parsed because there are not enough bytes
	ErrInvalidTVCTLength = errors.New("too few bytes to parse T-VCT")

	// returned when the table ID of the VCT is unknown
	ErrInvalidTableID = errors.New("invalid VCT table ID (unknown VCT table type)")

	// returned when updating PSIP tables and a Continuity Error occurs.  Continuity errors happen
	// when a packet does not contain a Payload Unit Start and the last packet received was not
	// the previous packet as indicated by the MPEG header continuity counter
	ErrContinuity = errors.New("continuity error")

	ErrShortBuffer = errors.New("Buffer too short to parse")
)

Types

type CVCT

type CVCT struct {
	*TVCT
}

type Channel

type Channel interface {
	ShortName() string
	MajorNumber() uint16
	MinorNumber() uint16
	ModulationMode() uint8
	CarrierFrequency() uint32
	TSID() uint16
	Program() uint16
	ETMLocation() uint8
	AccessControlled() bool
	Hidden() bool
	HideGuide() bool
	ServiceType() uint8
	SourceID() uint16
	DescriptorsLength() int
	Descriptors() []psi.Descriptor
	Length() int
	CRC() []byte
}

type DSControl

type DSControl []byte

func (DSControl) DayOfMonth

func (dsc DSControl) DayOfMonth() int

func (DSControl) Hour

func (dsc DSControl) Hour() int

func (DSControl) Status

func (dsc DSControl) Status() bool

type MGT

type MGT interface {
	NumTables() int
	Tables() []TableInfo
	Descriptors() []psi.Descriptor
}

Master Guide Table

type PSIPHandler

type PSIPHandler struct {
	// contains filtered or unexported fields
}

type STT

type STT struct {
	*Table
}

func (*STT) DaylightSaving

func (s *STT) DaylightSaving() DSControl

func (*STT) GPSOffset

func (s *STT) GPSOffset() uint8

func (*STT) SystemTime

func (s *STT) SystemTime() time.Time

type TVCT

type TVCT struct {
	*Table
}

func (*TVCT) AdditionalDescriptorsLength

func (vct *TVCT) AdditionalDescriptorsLength() uint16

func (*TVCT) Channels

func (vct *TVCT) Channels() []Channel

func (*TVCT) NumChannelsInSection

func (vct *TVCT) NumChannelsInSection() int

type Table

type Table struct {
	psi.Table
}

func (*Table) Data

func (t *Table) Data() []byte

func (*Table) ProtocolVersion

func (t *Table) ProtocolVersion() uint8

type TableInfo

type TableInfo []byte

func (TableInfo) Descriptors

func (t TableInfo) Descriptors() []psi.Descriptor

func (TableInfo) DescriptorsLength

func (t TableInfo) DescriptorsLength() int

func (TableInfo) Length

func (t TableInfo) Length() int

func (TableInfo) PID

func (t TableInfo) PID() uint16

func (TableInfo) TableLength

func (t TableInfo) TableLength() int

func (TableInfo) Type

func (t TableInfo) Type() uint16

func (TableInfo) Version

func (t TableInfo) Version() uint8

type Tables

type Tables interface {
	Update(ts.Packet) error
	VCT() VCT
}

Tables are the collection of all ATSC PSIP tables

type VCT

type VCT interface {
	NumChannelsInSection() int
	Channels() []Channel
	AdditionalDescriptorsLength() uint16
}

VCT represents operations on a Terrestrial Virtual Channel Table