Class MMMRdsDataObserver

class MMMRdsDataObserver;

Description

This mixin class should be implemented by applications wishing to receive notifications when RDS data is received, changes or becomes invalid. Each method corresponds to a particular request in CMMRdsTunerUtility. Only methods corresponding to requests in CMMRdsTunerUtility that are used by a client need be implemented - empty default implementations are provided.

Members

Defined in MMMRdsDataObserver:
MrdoDataReceived(), MrdoError(), MrdoRadioTextReceived()

virtual void MrdoError(TInt aError)=0;

Description

Called when some error occurs which makes RDS data unavailable.

Parameters

TInt aError - contains a standard system error code

virtual void MrdoDataReceived(const TRdsData &aData, TUint32 aValid, TUint32 aChanged)=0;

Description

Called when some RDS data is received or has changed.

Two subsets of the RDS data supplied are indicted: that which has changed and that which is valid. This information can be interpreted as follows: For an item of RDS data x: valid(x) & !changed(x) => x was received before and has not changed valid(x) & changed(x) => x has either just been received for the first time, or has just changed !valid(x) & changed(x) => x is no longer available !valid(x) & !changed(x) => x was not available before, and is still not available.

When the tuner is retuned to a new station, all RDS data will be flushed. This will result in a call to this function indicating that all RDS data has changed and is longer valid.

Parameters

const TRdsData &aData The RDS data. TUint32 aValid Indicates a subset of aData that is valid (i.e. has been received) TUint32 aChanged Indicates a subset of aData that has changed since the last call to this function.

virtual void MrdoRadioTextReceived(const TDesC &aRt, TBool aValid, TBool aChanged)=0;

Description

Called when the RDS Radio Text (RT) is received, changes, or is no longer available.

Parameters

const TDesC &aRt The Radio Text message. This will be empty if aValid==EFalse. TBool aValid Indicates if the radio text is valid. TBool aChanged Indicates if the radio text has changed.