| class MMidiClientUtilityObserver |
Active object utility class to allow MIDI events to be signalled asynchronously. CMidiClientUtility::NewL().
| Public Member Functions | |
|---|---|
| void | MmcuoInstrumentChanged(TInt, TInt, TInt) |
| void | MmcuoMetaDataEntryFound(const TInt, const TTimeIntervalMicroSeconds &) |
| void | MmcuoMipMessageReceived(const RArray< TMipMessageEntry > &) |
| void | MmcuoMuteChanged(TInt, TBool) |
| void | MmcuoPolyphonyChanged(TInt) |
| void | MmcuoStateChanged(TMidiState, TMidiState, const TTimeIntervalMicroSeconds &, TInt) |
| void | MmcuoSyncUpdate(const TTimeIntervalMicroSeconds &, TInt64) |
| void | MmcuoTempoChanged(TInt) |
| void | MmcuoVolumeChanged(TInt, TReal32) |
| void | MmcuoInstrumentChanged | ( | TInt | aChannel, |
| TInt | aBankId, | |||
| TInt | aInstrumentId | |||
| ) | [pure virtual] | |||
An instrument has been changed on a channel.
| TInt aChannel | Channel where the change of instrument occurred. 0 <= aChannel < ChannelsSupportedL(). |
| TInt aBankId | Identifier of the bank that the instrument belongs to, occupying no more than 14 bits. The bank ID is a concatenation of MIDI bank MSB and LSB values. |
| TInt aInstrumentId | Identifier of the instrument that has been changed. 0 <= aInstrumentId <= 127. |
| void | MmcuoMetaDataEntryFound | ( | const TInt | aMetaDataEntryId, |
| const TTimeIntervalMicroSeconds & | aPosition | |||
| ) | [pure virtual] | |||
A timed meta data entry has been found in the MIDI data stream, eg a timed song lyric in an SMF file.
| const TInt aMetaDataEntryId | Index of the meta data entry - if this entry has not been encountere before, it will be added to the list of meta data entries. Previously encountered timed entries still generate this callback. |
| const TTimeIntervalMicroSeconds & aPosition | Position in microseconds relative to the start of the MIDI resource that the MIDI meta data entry was found at. |
| void | MmcuoMipMessageReceived | ( | const RArray< TMipMessageEntry > & | aMessage | ) | [pure virtual] |
A MIP message has been found in the MIDI data stream.
| const RArray< TMipMessageEntry > & aMessage | Reference to an array of MIP message entries (logical {channel, MIP} value pairs) contained in the message. |
| void | MmcuoMuteChanged | ( | TInt | aChannel, |
| TBool | aMuted | |||
| ) | [pure virtual] | |||
The MIDI resource has encountered a mute message in the MIDI data stream.
| void | MmcuoPolyphonyChanged | ( | TInt | aNewPolyphony | ) | [pure virtual] |
The polyphony of the MIDI engine has changed.
| TInt aNewPolyphony | The new polyphony value. |
| void | MmcuoStateChanged | ( | TMidiState | aOldState, |
| TMidiState | aNewState, | |||
| const TTimeIntervalMicroSeconds & | aTime, | |||
| TInt | aError | |||
| ) | [pure virtual] | |||
A state change has occurred in the MIDI client utility.
| TMidiState aOldState | Old state. |
| TMidiState aNewState | New state. |
| const TTimeIntervalMicroSeconds & aTime | The time in microseconds at which playback stopped relative to the start of the MIDI resource. |
| TInt aError | Error code. |
| void | MmcuoSyncUpdate | ( | const TTimeIntervalMicroSeconds & | aMicroSeconds, |
| TInt64 | aMicroBeats | |||
| ) | [pure virtual] | |||
Callback in response to a call to CMIDIClientUtility::SetSyncUpdateCallbackIntervalL(). By default there are no callbacks. Otherwise the callback is called at an interval set by the client.
| const TTimeIntervalMicroSeconds & aMicroSeconds | Position in microseconds relative to the start of the resource - only set if the sync update set function was called with the microseconds parameter set. |
| TInt64 aMicroBeats | Position in microbeats relative to the start of the resource - only set if the sync update set function was called with the microbeats parameter set and the microseconds parameter set to 0. |
| void | MmcuoTempoChanged | ( | TInt | aMicroBeatsPerMinute | ) | [pure virtual] |
The MIDI resource has encountered a tempo change message in the MIDI data stream.
| TInt aMicroBeatsPerMinute | New tempo value in micro beats per minute (BPM*1000000). |