Class: shaka.cea.Cea708Service

Constructor

new Cea708Service(serviceNumbernon-null)

Parameters:
Name Type Description
serviceNumber number
Source:

Members

ASCII_BACKSPACE :number

@const
Type:
  • number
Source:

ASCII_CARRIAGE_RETURN :number

@const
Type:
  • number
Source:

ASCII_FORM_FEED :number

@const
Type:
  • number
Source:

ASCII_HOR_CARRIAGE_RETURN :number

@const
Type:
  • number
Source:

Colors :Array.<!string>

An array of 8 colors that 64 colors can be quantized to. Order here matters.
Type:
  • Array.<!string>
Source:

EXT_CEA708_CTRL_CODE_BYTE1 :number

For extended control codes in block_data on CEA-708, byte 1 is 0x10.
Type:
  • number
Source:

G2Charset :Map.<!number, !string>

Holds characters mapping for bytes that are G2 control codes.
Type:
  • Map.<!number, !string>
Source:

currentWindow_ :shaka.cea.Cea708Window

The current window for which window command operate on.
Type:
Source:

serviceNumber_ :number

Number for this specific service (1 - 63).
Type:
  • number
Source:

windows_ :Array.<?shaka.cea.Cea708Window>

Eight Cea708 Windows, as defined by the spec.
Type:
Source:

Methods

clear()

Clears the state of the service completely.
Source:

clearWindows_(windowsBitmapnon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Parameters:
Name Type Description
windowsBitmap number
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

defineWindow_(dtvccPacketnon-null, windowNumnon-null, ptsnon-null)

Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
windowNum number
pts number
Source:
Throws:
shaka.util.Error

deleteWindows_(windowsBitmapnon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Parameters:
Name Type Description
windowsBitmap number
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

displayWindows_(windowsBitmapnon-null, ptsnon-null)

Parameters:
Name Type Description
windowsBitmap number
pts number
Source:

getSpecifiedWindowIds_(bitmap) → {Array.<number>}

Yields each non-null window specified in the 8-bit bitmap.
Parameters:
Name Type Description
bitmap number 8 bits corresponding to each of the 8 windows.
Source:
Returns:
Type
Array.<number>

handleC0_(controlCodenon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Handles C0 group data.
Parameters:
Name Type Description
controlCode number
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

handleC1_(dtvccPacketnon-null, captionCommandnon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Processes C1 group data. These are caption commands.
Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
captionCommand number
pts number in seconds
Source:
Throws:
a possible out-of-range buffer read.
Type
shaka.util.Error
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

handleC2_(dtvccPacketnon-null, controlCodenon-null)

Handles C2 group data.
Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
controlCode number
Source:

handleC3_(dtvccPacketnon-null, controlCodenon-null)

Handles C3 group data.
Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
controlCode number
Source:

handleCea708ControlCode(dtvccPacketnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Processes a CEA-708 control code.
Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
Source:
Throws:
shaka.util.Error
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

handleG0_(controlCodenon-null)

Handles G0 group data.
Parameters:
Name Type Description
controlCode number
Source:

handleG1_(controlCodenon-null)

Handles G1 group data.
Parameters:
Name Type Description
controlCode number
Source:

handleG2_(controlCodenon-null)

Handles G2 group data.
Parameters:
Name Type Description
controlCode number
Source:

handleG3_(controlCodenon-null)

Handles G3 group data.
Parameters:
Name Type Description
controlCode number
Source:

hideWindows_(windowsBitmapnon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Parameters:
Name Type Description
windowsBitmap number
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

reset_(ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Emits anything currently present in any of the windows, and then deletes all windows, cancels all delays, reinitializes the service.
Parameters:
Name Type Description
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

rgbColorToHex_(rednon-null, greennon-null, bluenon-null) → {string}

Maps 64 possible CEA-708 colors to 8 CSS colors.
Parameters:
Name Type Description
red number value from 0-3
green number value from 0-3
blue number value from 0-3
Source:
Returns:
Type
string

setCurrentWindow_(windowNumnon-null)

Parameters:
Name Type Description
windowNum number
Source:

setPenAttributes_(dtvccPacketnon-null)

Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
Source:
Throws:
shaka.util.Error

setPenColor_(dtvccPacketnon-null)

Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
Source:
Throws:
shaka.util.Error

setPenLocation_(dtvccPacketnon-null)

Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
Source:
Throws:
shaka.util.Error

setWindowAttributes_(dtvccPacketnon-null)

Parameters:
Name Type Description
dtvccPacket shaka.cea.DtvccPacket
Source:
Throws:
shaka.util.Error

toggleWindows_(windowsBitmapnon-null, ptsnon-null) → {shaka.cea.ICaptionDecoder.ClosedCaption}

Parameters:
Name Type Description
windowsBitmap number
pts number
Source:
Returns:
Type
shaka.cea.ICaptionDecoder.ClosedCaption

Type Definitions

Cea708Byte

CEA-708 closed captions byte.
Type:
  • {pts: number, type: number, value: number, order: number}
Properties:
Name Type Description
pts number Presentation timestamp (in second) at which this packet was received.
type number Type of the byte. Either 2 or 3, DTVCC Packet Data or a DTVCC Packet Start.
value number The byte containing data relevant to the packet.
order number A number indicating the order this packet was received in a sequence of packets. Used to break ties in a stable sorting algorithm
Source: