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BtSequenceBtSequence — class for the event timeline of a BtSong instance |
gboolean | bt_sequence_add_track () |
void | bt_sequence_delete_full_rows () |
void | bt_sequence_delete_rows () |
GstClockTime | bt_sequence_get_bar_time () |
gchar * | bt_sequence_get_label () |
GstClockTime | bt_sequence_get_loop_time () |
BtMachine * | bt_sequence_get_machine () |
BtPattern * | bt_sequence_get_pattern () |
glong | bt_sequence_get_tick_by_pattern () |
glong | bt_sequence_get_track_by_machine () |
void | bt_sequence_insert_full_rows () |
void | bt_sequence_insert_rows () |
gboolean | bt_sequence_is_pattern_used () |
gulong | bt_sequence_limit_play_pos () |
gboolean | bt_sequence_move_track_left () |
gboolean | bt_sequence_move_track_right () |
BtSequence * | bt_sequence_new () |
gboolean | bt_sequence_remove_track_by_ix () |
gboolean | bt_sequence_remove_track_by_machine () |
void | bt_sequence_repair_damage () |
void | bt_sequence_set_label () |
void | bt_sequence_set_pattern () |
gboolean | bt_sequence_set_pattern_quick () |
void | bt_sequence_update_tempo () |
gulong | length | Read / Write |
gboolean | loop | Read / Write |
glong | loop-end | Read / Write |
glong | loop-start | Read / Write |
gpointer | properties | Read |
BtSong * | song | Read / Write / Construct Only |
gulong | tracks | Read / Write |
void | pattern-added | No Hooks |
void | pattern-removed | No Hooks |
void | rows-changed | No Hooks |
void | track-added | No Hooks |
void | track-removed | No Hooks |
A sequence holds grid of BtPatterns, with labels on the time axis and BtMachine instances on the track axis. It tracks first and last use of patterns and provides two signals for notification - “pattern-added” and “pattern-removed”.
It supports looping a section of the sequence (see “loop”, “loop-start”, “loop-end”).
The BtSequence manages the GstController event queues for the BtMachines and BtWires. It uses a damage-repair based two phase algorithm to update the controller queues whenever patterns or the sequence changes.
gboolean bt_sequence_add_track (const BtSequence * const self
,const BtMachine * const machine
,const glong ix
);
Adds a new track with the machine
at ix
or the end.
self |
the BtSequence that holds the tracks |
|
machine |
the BtMachine |
|
ix |
position to add the track at, use -1 to append |
void bt_sequence_delete_full_rows (const BtSequence * const self
,const gulong time
,const gulong rows
);
Delete row for all tracks.
Since 0.3
void bt_sequence_delete_rows (const BtSequence * const self
,const gulong time
,const glong track
,const gulong rows
);
Delete row for given track
.
self |
the sequence |
|
time |
the postion to delete |
|
track |
the track |
|
rows |
the number of rows to remove |
Since 0.3
GstClockTime
bt_sequence_get_bar_time (const BtSequence * const self
);
Calculates the length of one sequence bar in microseconds.
Divide it by G_USEC_PER_SEC
to get it in milliseconds.
gchar * bt_sequence_get_label (const BtSequence * const self
,const gulong time
);
Fetches the label for the given time
position. Free when done.
GstClockTime
bt_sequence_get_loop_time (const BtSequence * const self
);
Calculates the length of the song loop in microseconds.
Divide it by G_USEC_PER_SEC
to get it in milliseconds.
BtMachine * bt_sequence_get_machine (const BtSequence * const self
,const gulong track
);
Fetches the BtMachine for the given track
. Unref when done.
BtPattern * bt_sequence_get_pattern (const BtSequence * const self
,const gulong time
,const gulong track
);
Fetches the pattern for the given time
and track
position. Unref when done.
self |
the BtSequence that holds the patterns |
|
time |
the requested time position |
|
track |
the requested track index |
glong bt_sequence_get_tick_by_pattern (const BtSequence * const self
,gulong track
,const BtPattern * const pattern
,gulong tick
);
Gets the next tick position >= tick
this pattern
is on.
self |
the sequence to search in |
|
track |
the track to search in |
|
pattern |
the pattern to find the next track for |
|
tick |
the tick position to start the search from |
Since 0.6
glong bt_sequence_get_track_by_machine (const BtSequence * const self
,const BtMachine * const machine
,gulong track
);
Gets the next track >= track
this machine
is on.
self |
the sequence to search in |
|
machine |
the machine to find the next track for |
|
track |
the track to start the search from |
Since 0.6
void bt_sequence_insert_full_rows (const BtSequence * const self
,const gulong time
,const gulong rows
);
Insert one empty row for all tracks.
Since 0.3
void bt_sequence_insert_rows (const BtSequence * const self
,const gulong time
,const glong track
,const gulong rows
);
Insert one empty row for given track
.
self |
the sequence |
|
time |
the postion to insert at |
|
track |
the track |
|
rows |
the number of rows to insert |
Since 0.3
gboolean bt_sequence_is_pattern_used (const BtSequence * const self
,const BtPattern * const pattern
);
Checks if the pattern
is used in the sequence.
gulong bt_sequence_limit_play_pos (const BtSequence * const self
,const gulong play_pos
);
Enforce the playback position to be within loop start and end or the song bounds if there is no loop.
gboolean bt_sequence_move_track_left (const BtSequence * const self
,const gulong track
);
Move the selected track on column left.
gboolean bt_sequence_move_track_right (const BtSequence * const self
,const gulong track
);
Move the selected track on column left.
BtSequence *
bt_sequence_new (const BtSong * const song
);
Create a new instance. One would not call this directly, but rather get this from a BtSong instance.
gboolean bt_sequence_remove_track_by_ix (const BtSequence * const self
,const gulong ix
);
Removes the specified track
.
gboolean bt_sequence_remove_track_by_machine (const BtSequence * const self
,const BtMachine * const machine
);
Removes all tracks that belong the the given machine
.
void
bt_sequence_repair_damage (const BtSequence * const self
);
Works through the repair queue and rebuilds controller queues, where needed.
There is usualy no need to call that manualy. Only call after soing mass
updates using bt_sequence_set_pattern_quick()
functions.
Since 0.5
void bt_sequence_set_label (const BtSequence * const self
,const gulong time
,const gchar * const label
);
Sets a new label for the respective time
position.
self |
the BtSequence that holds the labels |
|
time |
the requested time position |
|
label |
the new label |
void bt_sequence_set_pattern (const BtSequence * const self
,const gulong time
,const gulong track
,const BtPattern * const pattern
);
Sets the BtPattern for the respective time
and track
position.
self |
the BtSequence that holds the patterns |
|
time |
the requested time position |
|
track |
the requested track index |
|
pattern |
the BtPattern or |
gboolean bt_sequence_set_pattern_quick (const BtSequence * const self
,const gulong time
,const gulong track
,const BtPattern * const pattern
);
A quick version of bt_sequence_set_pattern()
that does not repair damaged
area. Useful when doing mass updates.
self |
the BtSequence that holds the patterns |
|
time |
the requested time position |
|
track |
the requested track index |
|
pattern |
the BtPattern or |
Since 0.5
void
bt_sequence_update_tempo (const BtSequence * const self
);
Refresh sequence after tempo changes. Called from BtSongInfo.
struct BtSequence;
Starting point for the BtSong timeline data-structures. Holds a series of array of BtPatterns for time and tracks, which define the events that are sent to a BtMachine at a time.
“length”
property “length” gulong
length of the sequence in timeline bars.
Flags: Read / Write
Allowed values: <= G_MAXINT64
“loop-end”
property “loop-end” glong
end of the repeat sequence on the timeline.
Flags: Read / Write
Allowed values: >= -1
Default value: -1
“loop-start”
property “loop-start” glong
start of the repeat sequence on the timeline.
Flags: Read / Write
Allowed values: >= -1
Default value: -1
“song”
property“song” BtSong *
Set song object, the sequence belongs to.
Flags: Read / Write / Construct Only
“pattern-added”
signalvoid user_function (BtSequence *self, BtPattern *pattern, gpointer user_data)
A pattern has been used in the sequence for the first time.
self |
the sequence object that emitted the signal |
|
pattern |
the new pattern |
|
user_data |
user data set when the signal handler was connected. |
Flags: No Hooks
“pattern-removed”
signalvoid user_function (BtSequence *self, BtPattern *pattern, gpointer user_data)
The last occurance of pattern has been removed from the sequence.
self |
the sequence object that emitted the signal |
|
pattern |
the old pattern |
|
user_data |
user data set when the signal handler was connected. |
Flags: No Hooks
“rows-changed”
signalvoid user_function (BtSequence *self, gulong begin, gulong end, gpointer user_data)
The content of the given rows in the sequence has changed.
self |
the sequence object that emitted the signal |
|
begin |
start row that changed |
|
end |
last row that changed |
|
user_data |
user data set when the signal handler was connected. |
Flags: No Hooks
Since 0.6
“track-added”
signalvoid user_function (BtSequence *self, BtMachine *machine, gulong track, gpointer user_data)
A new track for machine
has been added with the track
index.
self |
the sequence object that emitted the signal |
|
machine |
the machine for the track |
|
track |
the track index |
|
user_data |
user data set when the signal handler was connected. |
Flags: No Hooks
Since 0.6
“track-removed”
signalvoid user_function (BtSequence *self, BtMachine *machine, gulong track, gpointer user_data)
A track for machine
has been removed at the track
index.
self |
the sequence object that emitted the signal |
|
machine |
the machine for the track |
|
track |
the track index |
|
user_data |
user data set when the signal handler was connected. |
Flags: No Hooks
Since 0.6