Class BaseSongSession

java.lang.Object

org.jjazz.musiccontrol.api.playbacksession.BaseSongSession

All Implemented Interfaces:

PropertyChangeListener, EventListener, ControlTrackProvider, EndOfPlaybackActionProvider, PlaybackSession, SongContextProvider

Direct Known Subclasses:

StaticSongSession, UpdateProviderSongSession

public class BaseSongSession
extends Object
implements PropertyChangeListener, PlaybackSession, ControlTrackProvider, SongContextProvider, EndOfPlaybackActionProvider

A base implementation of a PlaybackSession to render a SongContext.

Music generation uses the SongSequenceBuilder (and optionnaly ActiveSongBackgroundMusicBuilder) then adds control/click/precount tracks, taking into account drums rerouting.

Once generated the session listens to the following changes:
- Song tempo, song closing
- MidiMix channel mute changes
- PlaybackSettings Click and Loop changes

The session never makes the session dirty. Use the provided subclasses for more advanced behaviors, e.g. update the dirty state, etc.

Nested Class Summary

Nested classes/interfaces inherited from interface org.jjazz.musiccontrol.api.playbacksession.PlaybackSession

PlaybackSession.Context, PlaybackSession.State

Field Summary

Fields

Modifier and Type	Field	Description
static final int	PLAYBACK_SETTINGS_LOOP_COUNT

Fields inherited from interface org.jjazz.musiccontrol.api.playbacksession.ControlTrackProvider

ENABLED_STATE

Fields inherited from interface org.jjazz.musiccontrol.api.playbacksession.PlaybackSession

PROP_DIRTY, PROP_LOOP_COUNT, PROP_MUTED_TRACKS, PROP_STATE, PROP_TEMPO

Constructor Summary

Constructors

Constructor	Description
BaseSongSession(SongContext sgContext, SessionConfig sConfig, boolean useActiveSongBackgroundMusicBuilder, PlaybackSession.Context context)	Create a session with the specified parameters.

Method Summary

Modifier and Type	Method	Description
void	addPropertyChangeListener(PropertyChangeListener l)
void	close()	Put session in the CLOSED state and release used resources, so that session can be disposed.
void	generate(boolean silent)	Generate the sequence for the SongContext.
IntRange	getBarRange()	The bar range corresponding to the sequence.
int	getClickTrackId()	Get the click sequence track number.
PlaybackSession.Context	getContext()	The context of this PlaybackSession.
ControlTrack	getControlTrack()	get the control track.
ActionListener	getEndOfPlaybackAction()	An action to be executed when music playback is stopped or paused (because user stopped it or end of sequence is reached).
BaseSongSession	getFreshCopy(SongContext sgContext)	Get a copy of this session in the NEW state for the specified context.
int	getLoopCount()	The sequencer loop count (see Java Sequencer setLoopCount()).
long	getLoopEndTick()	The tick position of the end of the loop.
long	getLoopStartTick()	The tick position of the start of the loop.
int	getPrecountTrackId()	Get the precount sequence track number.
Map<RhythmVoice,Phrase>	getRvPhraseMap()	A map giving the resulting Phrase for each RhythmVoice, in the current context.
Map<RhythmVoice,Integer>	getRvTrackIdMap()	A map providing the track id (index) corresponding to each used RhythmVoice in the given context.
Sequence	getSequence()	The Midi sequence.
SessionConfig	getSessionConfig()
SongContext	getSongContext()
PlaybackSession.State	getState()	Get the state of this session.
int	getTempo()	Get the tempo in BPM.
long	getTick(int barIndex)	Get the start tick position corresponding to the specified bar.
HashMap<Integer,Boolean>	getTracksMuteStatus()	The mute status of all tracks.
boolean	isDirty()	We don't listen to any change on the underlying context data: always return false.
boolean	isUseActiveSongBackgroundMusicBuilder()
void	propertyChange(PropertyChangeEvent e)
void	removePropertyChangeListener(PropertyChangeListener l)
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

PLAYBACK_SETTINGS_LOOP_COUNT

public static final int PLAYBACK_SETTINGS_LOOP_COUNT

See Also:

• Constant Field Values

Constructor Details

BaseSongSession

public BaseSongSession(SongContext sgContext,
 SessionConfig sConfig,
 boolean useActiveSongBackgroundMusicBuilder,
 PlaybackSession.Context context)

Create a session with the specified parameters.

Parameters:

sgContext - Can not be null

sConfig - Can not be null

useActiveSongBackgroundMusicBuilder - If true use ActiveSongBackgroundMusicBuilder when possible to speed up music generation

context - Can not be null

Method Details

getFreshCopy

public BaseSongSession getFreshCopy(SongContext sgContext)

Description copied from interface: PlaybackSession

Get a copy of this session in the NEW state for the specified context.

Specified by:

getFreshCopy in interface PlaybackSession

Parameters:

sgContext - If null use a copy of this session'SongContext

Returns:

getContext

public PlaybackSession.Context getContext()

Description copied from interface: PlaybackSession

The context of this PlaybackSession.

Specified by:

getContext in interface PlaybackSession

Returns:

Can not be null

isUseActiveSongBackgroundMusicBuilder

public boolean isUseActiveSongBackgroundMusicBuilder()

getState

public PlaybackSession.State getState()

Description copied from interface: PlaybackSession

Get the state of this session.

Specified by:

getState in interface PlaybackSession

Returns:

See Also:

• PlaybackSession.PROP_STATE

generate

public void generate(boolean silent)
              throws MusicGenerationException

Generate the sequence for the SongContext.

When all parameters are enabled, sequence will contain:
- track 0: song name, tempo and tempo factor changes (see SongSequenceBuilder)
- track 1-N: the song tracks, one per RhythmVoice(see SongSequenceBuilder)
- track N+1: control track with beat events + chord symbol markers
- track N+2: click track
- track N+3: precount-click track

Manage the drums rerouting.

Specified by:

generate in interface PlaybackSession

Parameters:

silent -

Throws:

MusicGenerationException

IllegalStateException - If state is not NEW

isDirty

public boolean isDirty()

We don't listen to any change on the underlying context data: always return false.

Specified by:

isDirty in interface PlaybackSession

Returns:

See Also:

• PlaybackSession.PROP_DIRTY

getTempo

public int getTempo()

Description copied from interface: PlaybackSession

Get the tempo in BPM.

Specified by:

getTempo in interface PlaybackSession

Returns:

-1 if no meaningful value can be returned.

See Also:

• PlaybackSession.PROP_TEMPO

getSequence

public Sequence getSequence()

Description copied from interface: PlaybackSession

The Midi sequence.

Specified by:

getSequence in interface PlaybackSession

Returns:

Can be null if no meaningful value can be returned.

getLoopStartTick

public long getLoopStartTick()

Description copied from interface: PlaybackSession

The tick position of the start of the loop.

Specified by:

getLoopStartTick in interface PlaybackSession

Returns:

-1 if no meaningful value can be returned.

getLoopEndTick

public long getLoopEndTick()

Description copied from interface: PlaybackSession

The tick position of the end of the loop.

Specified by:

getLoopEndTick in interface PlaybackSession

Returns:

-1 if no meaningful value can be returned (loop will be at the end of sequence)

getLoopCount

public int getLoopCount()

Description copied from interface: PlaybackSession

The sequencer loop count (see Java Sequencer setLoopCount()).

Specified by:

getLoopCount in interface PlaybackSession

Returns:

0 means sequence is played only once, 1 means sequence is played twice, etc. -1 means loop forever.

getTick

public long getTick(int barIndex)

Description copied from interface: PlaybackSession

Get the start tick position corresponding to the specified bar.

Specified by:

getTick in interface PlaybackSession

Parameters:

barIndex -

Returns:

-1 if no meaningful value can be returned.

getBarRange

public IntRange getBarRange()

Description copied from interface: PlaybackSession

The bar range corresponding to the sequence.

Specified by:

getBarRange in interface PlaybackSession

Returns:

Null if no meaningful value can be returned.

getTracksMuteStatus

public HashMap<Integer,Boolean> getTracksMuteStatus()

The mute status of all tracks.

This includes the click/precount/control tracks when enabled.

Specified by:

getTracksMuteStatus in interface PlaybackSession

Returns:

See Also:

• PlaybackSession.PROP_MUTED_TRACKS

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener l)

Specified by:

addPropertyChangeListener in interface PlaybackSession

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener l)

Specified by:

removePropertyChangeListener in interface PlaybackSession

close

public void close()

Description copied from interface: PlaybackSession

Put session in the CLOSED state and release used resources, so that session can be disposed.

Specified by:

close in interface PlaybackSession

See Also:

• PlaybackSession.PROP_STATE

getRvTrackIdMap

public Map<RhythmVoice,Integer> getRvTrackIdMap()

A map providing the track id (index) corresponding to each used RhythmVoice in the given context.

If a song uses rhythms R1 and R2 and context is only on R2 bars, then the map only contains R2 rhythm voices and track id.

Returns:

Null if no meaningful value can be returned.

getRvPhraseMap

public Map<RhythmVoice,Phrase> getRvPhraseMap()

A map giving the resulting Phrase for each RhythmVoice, in the current context.

Returns:

Null if no meaningful value can be returned.

getClickTrackId

public int getClickTrackId()

Get the click sequence track number.

Returns:

-1 if no click track

getPrecountTrackId

public int getPrecountTrackId()

Get the precount sequence track number.

Returns:

-1 if no precount track

getSessionConfig

public SessionConfig getSessionConfig()

getSongContext

public SongContext getSongContext()

Specified by:

getSongContext in interface SongContextProvider

getControlTrack

public ControlTrack getControlTrack()

Description copied from interface: ControlTrackProvider

get the control track.

Specified by:

getControlTrack in interface ControlTrackProvider

Returns:

Null if no contral track available.

getEndOfPlaybackAction

public ActionListener getEndOfPlaybackAction()

Description copied from interface: EndOfPlaybackActionProvider

An action to be executed when music playback is stopped or paused (because user stopped it or end of sequence is reached).

Specified by:

getEndOfPlaybackAction in interface EndOfPlaybackActionProvider

Returns:

Can be null

propertyChange

public void propertyChange(PropertyChangeEvent e)

Specified by:

propertyChange in interface PropertyChangeListener

toString

public String toString()

Overrides:

toString in class Object