Video Programming System Decoder
[Low Level Decoding]

Functions to decode VPS packets (ETS 300 231). More...

Functions
vbi_bool	vbi_decode_vps_cni (unsigned int *cni, const uint8_t buffer[13])
vbi_bool	vbi_encode_vps_cni (uint8_t buffer[13], unsigned int cni)

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Detailed Description

Functions to decode VPS packets (ETS 300 231).

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Function Documentation

vbi_bool vbi_decode_vps_cni	(	unsigned int *	cni,
		const uint8_t	buffer[13]
	)

Parameters:

	cni	CNI of type VBI_CNI_TYPE_VPS is stored here.
	buffer	VPS packet as defined for VBI_SLICED_VPS, i.e. 13 bytes without clock run-in and start code.

Decodes a VPS packet according to ETS 300 231, returning the 12 bit Country and Network Identifier in cni.

The code 0xDC3 is translated according to TR 101 231: "As this code is used for a time in two networks a distinction for automatic tuning systems is given in data line 16 [VPS]: bit 3 of byte 5 = 1 for the ARD network / = 0 for the ZDF network."

Returns:

Always TRUE, no error checking possible. It may be prudent to wait until two identical packets have been received.

Since:

0.2.20

vbi_bool vbi_encode_vps_cni	(	uint8_t	buffer[13],
		unsigned int	cni
	)

Parameters:

	buffer	VPS packet as defined for VBI_SLICED_VPS, i.e. 13 bytes without clock run-in and start code.
	cni	CNI of type VBI_CNI_TYPE_VPS.

Stores the 12 bit Country and Network Identifier cni in a VPS packet according to ETS 300 231.

Returns:

FALSE if cni is invalid; in this case buffer remains unmodified.

Since:

0.2.20

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