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Simplify and improve tempomap, measure line drawing and snapping.

This commit is contained in:
Jonathan Moore Liles 2008-05-14 13:31:11 -05:00
parent 974618863b
commit 4f52567504
3 changed files with 74 additions and 116 deletions
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13
Timeline/Sequence_Widget.H
View File

@ -82,6 +82,19 @@ struct BBT
};
/* FIXME: wrong place for this */
struct position_info
{
nframes_t frame;
float tempo;
int beats_per_bar;
int beat_type;
BBT bbt;
};
/* Base class for virtual widget on a track */
class Sequence_Widget : public Loggable
{

171
Timeline/Timeline.C
View File

@ -277,6 +277,12 @@ Timeline::time ( nframes_t when, int bpb, int note_type )
/* } */
/* } */
/************/
/* Snapping */
/************/
struct nearest_line_arg
{
nframes_t original;
@ -285,7 +291,6 @@ struct nearest_line_arg
const int snap_pixel = 10;
static nframes_t
abs_diff ( nframes_t n1, nframes_t n2 )
{
@ -297,6 +302,9 @@ nearest_line_cb ( nframes_t frame, const BBT &bbt, void *arg )
{
nearest_line_arg *n = (nearest_line_arg *)arg;
if ( Timeline::snap_to == Timeline::Bars && bbt.beat )
return;
if ( Timeline::snap_magnetic &&
abs_diff( frame, n->original ) > timeline->x_to_ts( snap_pixel ) )
return;
@ -305,7 +313,9 @@ nearest_line_cb ( nframes_t frame, const BBT &bbt, void *arg )
n->closest = frame;
}
/** return the absolute pixel of the nearest measure line to /x/ */
/** Set the value pointed to by /frame/ to the frame number of the of
the nearest measure line to /when/. Returns true if the new value of
*frame is valid, false otherwise. */
bool
Timeline::nearest_line ( nframes_t when, nframes_t *frame ) const
{
@ -314,13 +324,14 @@ Timeline::nearest_line ( nframes_t when, nframes_t *frame ) const
nearest_line_arg n = { when, -1 };
/* FIXME: handle snap to bar */
draw_measure( when - x_to_ts( 10 ), x_to_ts( 20 ), nearest_line_cb, frame );
render_tempomap( when - x_to_ts( w() >> 1 ), x_to_ts( w() ), nearest_line_cb, &n );
*frame = n.closest;
return *frame != (nframes_t)-1;
}
nframes_t
Timeline::x_to_offset ( int x ) const
{
@ -328,11 +339,8 @@ Timeline::x_to_offset ( int x ) const
}
void
static
/** draws a single measure line */
static void
draw_measure_cb ( nframes_t frame, const BBT &bbt, void *arg )
{
Fl_Color *color = (Fl_Color*)arg;
@ -352,117 +360,30 @@ draw_measure_cb ( nframes_t frame, const BBT &bbt, void *arg )
fl_line_style( FL_SOLID, 0 );
}
#if 0
/* we cache measure lines by rendering them to these structures. */
struct Measure_Line
{
/* it's easier to use this than a pixel coord, because the snapping
* code requires a frame number to be precise. */
nframes_t frame;
bool bar; /* is this a bar line, or just a beat? */
};
#endif
/* FIXME wrong place for this */
/* FIXME: wrong place for this */
const float ticks_per_beat = 1920.0;
/** return the BBT values for point in time /frame/ */
BBT
Timeline::solve_tempomap ( nframes_t when )
Timeline::solve_tempomap ( nframes_t frame ) const
{
BBT bbt;
position_info pos = render_tempomap( frame, 1, 0, 0 );
if ( ! tempo_track->_widgets.size() )
return bbt;
const nframes_t samples_per_minute = sample_rate() * 60;
list <Sequence_Widget*> tempo_map;
/* merge time and tempo maps into one list for convenience */
for ( list <Sequence_Widget *>::iterator i = tempo_track->_widgets.begin();
i != tempo_track->_widgets.end(); ++i )
tempo_map.push_back( *i );
for ( list <Sequence_Widget *>::iterator i = time_track->_widgets.begin();
i != time_track->_widgets.end(); ++i )
tempo_map.push_back( *i );
tempo_map.sort( Sequence_Widget::sort_func );
float bpm = 120.0f;
time_sig sig;
sig.beats_per_bar = 4;
sig.beat_type = 4;
nframes_t f = 0;
nframes_t frames_per_beat = samples_per_minute / bpm;
for ( list <Sequence_Widget *>::iterator i = tempo_map.begin();
i != tempo_map.end(); ++i )
{
if ( ! strcmp( (*i)->class_name(), "Tempo_Point" ) )
{
const Tempo_Point *p = (Tempo_Point*)(*i);
bpm = p->tempo();
frames_per_beat = samples_per_minute / bpm;
}
else
{
const Time_Point *p = (Time_Point*)(*i);
sig = p->time();
}
nframes_t next;
{
list <Sequence_Widget *>::iterator n = i;
++n;
if ( n == tempo_map.end() )
next = when;
else
next = min( (*n)->start(), when );
}
for ( ; f < next; f += frames_per_beat )
{
if ( ++bbt.beat == sig.beats_per_bar )
{
bbt.beat = 0;
++bbt.bar;
}
}
// const int x = ts_to_x( f - xoffset ) + Track::width();
if ( f >= when )
break;
}
/* FIXME: this this right? */
bbt.tick = ticks_per_beat - ( ( ( f - when ) * ticks_per_beat ) / frames_per_beat );
return bbt;
return pos.bbt;
}
/** draw appropriate measure lines inside the given bounding box */
void
Timeline::draw_measure ( nframes_t start, nframes_t length, measure_line_callback * cb, void *arg ) const
position_info
Timeline::render_tempomap( nframes_t start, nframes_t length, measure_line_callback * cb, void *arg ) const
{
if ( ! draw_with_measure_lines )
return;
const nframes_t end = start + length;
BBT bbt;
position_info pos;
memset( &pos, 0, sizeof( pos ) );
BBT &bbt = pos.bbt;
const nframes_t samples_per_minute = sample_rate() * 60;
@ -521,25 +442,47 @@ Timeline::draw_measure ( nframes_t start, nframes_t length, measure_line_callbac
if ( f >= start )
{
if ( f >= end )
return;
goto done;
/* in the zone */
cb( f, bbt, arg );
if ( cb )
cb( f, bbt, arg );
}
}
}
/* /\* FIXME: this this right? *\/ */
/* bbt.tick = ticks_per_beat - ( ( ( f - start ) * ticks_per_beat ) / frames_per_beat ); */
done:
/* return bbt; */
if ( f < end )
/* no tempo points? */
return pos;
pos.frame = f;
pos.tempo = bpm;
pos.beats_per_bar = sig.beats_per_bar;
pos.beat_type = sig.beat_type;
assert( f >= end );
/* assert( f - end <= frames_per_beat ); */
/* bbt.tick = ticks_per_beat - ( ( ( f - end ) * ticks_per_beat ) / frames_per_beat ); */
/* FIXME: this this right? */
const nframes_t frames_per_tick = frames_per_beat / ticks_per_beat;
bbt.tick = ticks_per_beat - ( ( ( f - end ) / frames_per_tick ) % (nframes_t)ticks_per_beat );
return pos;
}
void
Timeline::draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color )
{
if ( ! draw_with_measure_lines )
return;
Fl_Color colors[] = { fl_color_average( FL_RED, color, 0.65f ),
fl_color_average( FL_BLACK, color, 0.65f ) };
@ -548,7 +491,7 @@ Timeline::draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color )
fl_push_clip( X, Y, W, H );
draw_measure( start, length, draw_measure_cb, &colors );
render_tempomap( start, length, draw_measure_cb, &colors );
fl_pop_clip();
@ -558,7 +501,7 @@ Timeline::draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color )
void
Timeline::draw_measure_BBT ( int X, int Y, int W, int H, Fl_Color color )
{
// draw_measure( X, Y, W, H, color, true );
// render_tempomap( X, Y, W, H, color, true );
}
void

6
Timeline/Timeline.H
View File

@ -62,6 +62,8 @@ class Track;
#define redraw_overlay()
#endif
struct position_info;
struct Rectangle
{
int x;
@ -150,10 +152,10 @@ public:
typedef void (measure_line_callback)( nframes_t frame, const BBT & bbt, void *arg );
BBT solve_tempomap ( nframes_t when );
BBT solve_tempomap ( nframes_t when ) const;
void draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color );
void draw_measure_BBT ( int X, int Y, int W, int H, Fl_Color color );
void draw_measure ( nframes_t start, nframes_t length, measure_line_callback *cb, void *arg ) const;
position_info render_tempomap ( nframes_t start, nframes_t length, measure_line_callback *cb, void *arg ) const;
void xposition ( int X );
void yposition ( int Y );