MMidiClientUtilityObserver Class Reference
#include
<midiclientutility.h>
| class MMidiClientUtilityObserver |
Detailed Description
Active object utility class to allow MIDI events to be signalled asynchronously.
See also: CMidiClientUtility::NewL().
Member Function Documentation
MmcuoInstrumentChanged ( TInt, TInt, TInt )
| void | MmcuoInstrumentChanged | ( | TInt | aChannel, |
| | TInt | aBankId, |
| | TInt | aInstrumentId |
| | ) | [pure virtual] |
An instrument has been changed on a channel.
| Parameter | Description | | aChannel | Channel where the change of instrument occurred. 0 <= aChannel < ChannelsSupportedL(). |
| 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. |
| aInstrumentId | Identifier of the instrument that has been changed. 0 <= aInstrumentId <= 127. |
MmcuoMetaDataEntryFound ( const TInt, const TTimeIntervalMicroSeconds & )
A timed meta data entry has been found in the MIDI data stream, eg a timed song lyric in an SMF file.
| Parameter | Description | | 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. |
| aPosition | Position in microseconds relative to the start of the MIDI resource that the MIDI meta data entry was found at. |
MmcuoMipMessageReceived ( const RArray< TMipMessageEntry > & )
A MIP message has been found in the MIDI data stream.
| Parameter | Description | | aMessage | Reference to an array of MIP message entries (logical {channel, MIP} value pairs) contained in the message. |
MmcuoMuteChanged ( TInt, TBool )
| void | MmcuoMuteChanged | ( | TInt | aChannel, |
| | TBool | aMuted |
| | ) | [pure virtual] |
The MIDI resource has encountered a mute message in the MIDI data stream.
| Parameter | Description | | aChannel | Logical channel to which the message applies. 0 <= aChannel < ChannelsSupportedL(). |
| aMuted | New muting state of the channel - ETrue is muted, EFalse is unmuted. |
MmcuoPolyphonyChanged ( TInt )
| void | MmcuoPolyphonyChanged | ( | TInt | aNewPolyphony | ) | [pure virtual] |
The polyphony of the MIDI engine has changed.
| Parameter | Description | | aNewPolyphony | The new polyphony value. |
MmcuoStateChanged ( TMidiState, TMidiState, const TTimeIntervalMicroSeconds &, TInt )
A state change has occurred in the MIDI client utility.
| Parameter | Description | | aOldState | Old state. |
| aNewState | New state. |
| aTime | The time in microseconds at which playback stopped relative to the start of the MIDI resource. |
| aError | Error code. |
MmcuoSyncUpdate ( const TTimeIntervalMicroSeconds &, TInt64 )
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.
| Parameter | Description | | 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. |
| 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. |
MmcuoTempoChanged ( TInt )
| void | MmcuoTempoChanged | ( | TInt | aMicroBeatsPerMinute | ) | [pure virtual] |
The MIDI resource has encountered a tempo change message in the MIDI data stream.
| Parameter | Description | | aMicroBeatsPerMinute | New tempo value in micro beats per minute (BPM*1000000). |
MmcuoVolumeChanged ( TInt, TReal32 )
| void | MmcuoVolumeChanged | ( | TInt | aChannel, |
| | TReal32 | aVolumeInDecibels |
| | ) | [pure virtual] |
The MIDI resource has encountered a volume change message in the MIDI data stream.
| Parameter | Description | | aChannel | Logical channel to which the message applies. 0 <= aChannel < ChannelsSupportedL(). |
| aVolumeInDecibels | New volume setting being used. |