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/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* This program is free software; you can redistribute it and/or modify it */
/* under the terms of the GNU General Public License as published by the */
/* Free Software Foundation; either version 2 of the License, or (at your */
/* option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, but WITHOUT */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
#include "Timeline.H"
#include "Tempo_Sequence.H"
#include "Time_Sequence.H"
#include "Audio_Sequence.H"
#include "Control_Sequence.H"
#include <FL/Fl_Scrollbar.H>
#include "Ruler_Sequence.H"
// #include <FL/Fl_Image.H>
// #include <FL/Fl_RGB_Image.H> // needed for alpha blending
#include "Track.H"
bool Timeline::draw_with_measure_lines = true;
Timeline::snap_e Timeline::snap_to = Bars;
bool Timeline::snap_magnetic = true;
bool Timeline::follow_playhead = true;
const float UPDATE_FREQ = 0.02f;
#include "Playback_DS.H"
#include "Record_DS.H"
#include "Transport.H"
/** return the combined height of all visible children of (veritcal)
pack, /p/. This is necessary because pack sizes are adjusted only
when the relevant areas are exposes. */
static int
pack_visible_height ( const Fl_Pack *p )
{
int th = 0;
const Fl_Widget* const *w = p->array();
for ( int i = p->children(); i--; ++w )
if ( (*w)->visible() )
th += (*w)->h() + p->spacing();
return th;
}
/** recalculate the size of vertical scrolling area and inform scrollbar */
void
Timeline::adjust_vscroll ( void )
{
vscroll->value( _yposition, h() - rulers->h() - hscroll->h(), 0, pack_visible_height( tracks ) );
}
void
Timeline::cb_scroll ( Fl_Widget *w, void *v )
{
((Timeline*)v)->cb_scroll( w );
}
void
Timeline::cb_scroll ( Fl_Widget *w )
{
if ( w == vscroll )
{
tracks->position( tracks->x(), (rulers->y() + rulers->h()) - vscroll->value() );
yposition( vscroll->value() );
adjust_vscroll();
}
else
{
if ( hscroll->zoom_changed() )
{
_fpp = hscroll->zoom();
const int tw = tracks->w() - Track::width() - vscroll->w();
hscroll->value( ts_to_x( xoffset ), tw, 0, ts_to_x( _length ) );
redraw();
}
xposition( hscroll->value() );
}
}
Timeline::Timeline ( int X, int Y, int W, int H, const char* L ) : Fl_Overlay_Window( X, Y, W, H, L )
{
box( FL_FLAT_BOX );
xoffset = 0;
_yposition = 0;
_old_yposition = 0;
_old_xposition = 0;
X = Y = 0;
p1 = p2 = 0;
{
Scalebar *o = new Scalebar( X, Y + H - 18, W - 18, 18 );
o->range( 0, 48000 * 300 );
// o->zoom_range( 1, 16384 );
// o->zoom_range( 1, 65536 << 4 );
o->zoom_range( 1, 20 );
o->zoom( 8 );
o->type( FL_HORIZONTAL );
o->callback( cb_scroll, this );
hscroll = o;
}
{
Fl_Scrollbar *o = new Fl_Scrollbar( X + W - 18, Y, 18, H - 18 );
o->type( FL_VERTICAL );
o->callback( cb_scroll, this );
vscroll = o;
}
{
Fl_Pack *o = new Fl_Pack( X + Track::width(), Y, (W - Track::width()) - vscroll->w(), H - hscroll->h(), "rulers" );
o->type( Fl_Pack::VERTICAL );
{
Tempo_Sequence *o = new Tempo_Sequence( 0, 0, 800, 24 );
o->color( fl_gray_ramp( 18 ) );
o->label( "Tempo" );
o->align( FL_ALIGN_LEFT );
tempo_track = o;
}
{
Time_Sequence *o = new Time_Sequence( 0, 24, 800, 24 );
o->color( fl_gray_ramp( 16 ) );
o->label( "Time" );
o->align( FL_ALIGN_LEFT );
time_track = o;
}
{
Ruler_Sequence *o = new Ruler_Sequence( 0, 24, 800, 24 );
o->color( fl_gray_ramp( 'F' ) );
o->label( "Ruler" );
o->align( FL_ALIGN_LEFT );
ruler_track = o;
}
o->size( o->w(), o->child( 0 )->h() * o->children() );
rulers = o;
o->end();
}
{
// sample_rate() = engine->sample_rate();
_fpp = 8;
// _length = sample_rate() * 60 * 2;
/* FIXME: hack */
_length = -1;
{
Fl_Pack *o = new Fl_Pack( X, rulers->y() + rulers->h(), W - vscroll->w(), 1 );
o->type( Fl_Pack::VERTICAL );
o->spacing( 1 );
tracks = o;
o->end();
resizable( o );
}
}
/* rulers go above tracks... */
add( rulers );
/* make sure scrollbars are on top */
add( vscroll );
add( hscroll );
vscroll->range( 0, tracks->h() );
redraw();
end();
Fl::add_timeout( UPDATE_FREQ, update_cb, this );
}
float
Timeline::beats_per_minute ( nframes_t when ) const
{
return tempo_track->beats_per_minute( when );
}
int
Timeline::beats_per_bar ( nframes_t when ) const
{
time_sig t = time_track->time( when );
return t.beats_per_bar;
}
void
Timeline::beats_per_minute ( nframes_t when, float bpm )
{
tempo_track->add( new Tempo_Point( when, bpm ) );
}
#if 0
struct BBT
{
int bar, beat, tick;
BBT ( int bar, int beat, int tick ) : bar( bar ), beat( beat ), tick( tick )
{
}
};
/** returns the BBT value for timestamp /when/ by examining the tempo/time maps */
BBT
Timeline::bbt ( nframes_t when )
{
Tempo_Sequence *tempo = (Tempo_Sequence*)rulers->child( 0 );
BBT bbt;
for ( list <Sequence_Widget *>::const_iterator i = tempo.widgets.begin();
i != tempo.widgets.end(); ++i )
{
Tempo_Point *p = *i;
}
};
#endif
/** return the absolute pixel of the nearest measure line to /x/ */
int
Timeline::nearest_line ( int ix )
{
if ( snap_to == None )
return -1;
const nframes_t samples_per_minute = sample_rate() * 60;
for ( int x = ix - 10; x < ix + 10; ++x )
{
const int measure = ts_to_x( samples_per_minute / beats_per_minute( x_to_ts( x - Track::width() ) + xoffset ) );
if ( measure == 0 )
break;
// const int abs_x = ts_to_x( xoffset ) + x - Track::width();
const int abs_x = ts_to_x( xoffset ) + x;
int bpb = beats_per_bar( x_to_ts( x -Track::width() ) + xoffset );
if ( 0 == x % measure )
{
if ( snap_to == Bars )
{
if ( 0 == (abs_x / measure) % bpb )
return x;
}
else if ( snap_to == Beats )
{
return x;
}
}
}
return -1;
}
/** draw appropriate measure lines inside the given bounding box */
/* FIXME: this function *really* needs to be optimized. Currently it
searched both the time and tempo lists once for every horiontal
pixel and performs a number of calculations--this is slow. */
void
Timeline::draw_measure ( int X, int Y, int W, int H, Fl_Color color, bool BBT )
{
if ( ! draw_with_measure_lines )
return;
fl_push_clip( X, Y, W, H );
// fl_line_style( FL_DASH, 2 );
fl_line_style( FL_DASH, 0 );
const Fl_Color beat = fl_color_average( FL_BLACK, color, 0.65f );
const Fl_Color bar = fl_color_average( FL_RED, color, 0.65f );
const nframes_t samples_per_minute = sample_rate() * 60;
/* we need to back up a bit in order to catch all the numbers */
if ( BBT )
{
X -= 40;
W += 40;
}
for ( int x = X; x < X + W; ++x )
{
// measure = ts_to_x( (double)(sample_rate() * 60) / beats_per_minute( x_to_ts( x - Track::width() ) + xoffset ) );
const int measure = ts_to_x( samples_per_minute / beats_per_minute( x_to_ts( x - Track::width() ) + xoffset ) );
if ( measure == 0 )
break;
const int abs_x = ts_to_x( xoffset ) + x - Track::width();
if ( 0 == abs_x % measure )
{
int bpb = beats_per_bar( x_to_ts( x -Track::width() ) + xoffset );
if ( 0 == (abs_x / measure) % bpb )
{
if ( measure * bpb < 8 )
break;
if ( BBT )
{
fl_font( FL_HELVETICA, 14 );
fl_color( fl_lighter( color ) );
char pat[40];
const nframes_t ts = x_to_ts( abs_x );
// if ( draw_hms )
{
const double seconds = (double)ts / sample_rate();
int S = (int)seconds;
int M = S / 60; S -= M * 60;
int H = M / 60; M -= H * 60;
snprintf( pat, sizeof( pat ), "%d:%d:%d", H, M, S );
}
// else if ( draw_bbt )
{
/* const int bar = */
/* const int beat; */
/* const int tick = 0; */
/* snprintf( pat, sizeof( pat ), "%d:%d:%d", bar, beat, tick ); */
}
fl_draw( pat, x, Y + 14 );
}
fl_color( bar );
}
else
{
if ( measure < 8 )
continue;
fl_color( beat );
}
fl_line( x, Y, x, Y + H );
}
}
fl_line_style( FL_SOLID, 0 );
fl_pop_clip();
}
void
Timeline::draw_measure_lines ( int X, int Y, int W, int H, Fl_Color color )
{
draw_measure( X, Y, W, H, color, false );
}
/** just like draw mesure lines except that it also draws the BBT values. */
void
Timeline::draw_measure_BBT ( int X, int Y, int W, int H, Fl_Color color )
{
draw_measure( X, Y, W, H, color, true );
}
void
Timeline::xposition ( int X )
{
// _old_xposition = xoffset;
/* FIXME: shouldn't have to do this... */
X = min( X, ts_to_x( _length ) - tracks->w() - Track::width() );
xoffset = x_to_ts( X );
damage( FL_DAMAGE_SCROLL );
}
void
Timeline::yposition ( int Y )
{
// _old_yposition = _yposition;
_yposition = Y;
damage( FL_DAMAGE_SCROLL );
}
void
Timeline::draw_clip ( void * v, int X, int Y, int W, int H )
{
Timeline *tl = (Timeline *)v;
fl_push_clip( X, Y, W, H );
/* fl_color( rand() ); */
/* fl_rectf( X, Y, X + W, Y + H ); */
tl->draw_box();
tl->draw_child( *tl->rulers );
fl_push_clip( tl->tracks->x(), tl->rulers->y() + tl->rulers->h(), tl->tracks->w(), tl->h() - tl->rulers->h() - tl->hscroll->h() );
tl->draw_child( *tl->tracks );
fl_pop_clip();
fl_pop_clip();
}
// static unsigned char *rect_image;
void
Timeline::resize ( int X, int Y, int W, int H )
{
Fl_Overlay_Window::resize( X, Y, W, H );
/* why is this necessary? */
rulers->resize( Track::width(), 0, W - Track::width() - vscroll->w(), rulers->h() );
/* why is THIS necessary? */
hscroll->resize( 0, H - 18, hscroll->w(), 18 );
vscroll->size( vscroll->w(), H - 18 );
}
void
Timeline::draw ( void )
{
int X, Y, W, H;
int bdx = 0;
int bdw = 0;
X = tracks->x() + bdx + 1;
Y = tracks->y();
W = tracks->w() - bdw - 1;
H = tracks->h();
adjust_vscroll();
/* if ( damage() & FL_DAMAGE_USER1 ) */
/* { */
/* /\* save the rectangle so we can draw it (darkened) in the overlay *\/ */
/* Rectangle &r = _selection; */
/* make_current(); */
/* rect_image = fl_read_image( NULL, r.x, r.y, r.w, r.h, 0 ); */
/* return; */
/* } */
if ( ( damage() & FL_DAMAGE_ALL ) || ( damage() & FL_DAMAGE_EXPOSE ) )
{
printf( "complete redraw\n" );
draw_box( box(), 0, 0, w(), h(), color() );
fl_push_clip( 0, rulers->y(), w(), rulers->h() );
draw_child( *rulers );
fl_pop_clip();
fl_push_clip( tracks->x(), rulers->y() + rulers->h(), tracks->w(), hscroll->y() - (rulers->y() + rulers->h()) );
draw_child( *tracks );
fl_pop_clip();
draw_child( *hscroll );
draw_child( *vscroll );
redraw_overlay();
/* Rectangle &r = _selection; */
/* unsigned char *data = fl_read_image( NULL, r.x, r.y, r.w, r.h, 0 ); */
/* Fl_RGB_Image bi( data, r.w, r.h, 3 ); */
/* bi.color_average( FL_BLACK, 0.50f ); */
/* bi.draw( r.x, r.y ); */
/* delete[] data; */
/* if ( r.w && r.h ) */
/* { */
/* const unsigned char data[] = { 0, 127, 0, 96, */
/* 0, 96, 0, 127 }; */
/* Fl_RGB_Image bi( data, 2, 2, 2 ); */
/* Fl_Image *bi2 = bi.copy( r.w, r.h ); */
/* bi2->draw( r.x, r.y ); */
/* delete bi2; */
/* } */
return;
}
if ( damage() & FL_DAMAGE_SCROLL )
{
int dx = ts_to_x( _old_xposition ) - ts_to_x( xoffset );
int dy = _old_yposition - _yposition;
if ( ! dy )
fl_scroll( rulers->x(), rulers->y(), rulers->w(), rulers->h(), dx, 0, draw_clip, this );
Y = rulers->y() + rulers->h();
H = h() - rulers->h() - hscroll->h();
if ( dy == 0 )
fl_scroll( X + Track::width(), Y, W - Track::width(), H, dx, dy, draw_clip, this );
else
fl_scroll( X, Y, W, H, dx, dy, draw_clip, this );
_old_xposition = xoffset;
_old_yposition = _yposition;
}
if ( damage() & FL_DAMAGE_CHILD )
{
fl_push_clip( rulers->x(), rulers->y(), rulers->w(), rulers->h() );
update_child( *rulers );
fl_pop_clip();
fl_push_clip( tracks->x(), rulers->y() + rulers->h(), tracks->w(), h() - rulers->h() - hscroll->h() );
update_child( *tracks );
fl_pop_clip();
update_child( *hscroll );
update_child( *vscroll );
}
}
void
Timeline::draw_cursor ( nframes_t frame, Fl_Color color )
{
int x = ( ts_to_x( frame ) - ts_to_x( xoffset ) ) + tracks->x() + Track::width();
if ( x < tracks->x() + Track::width() || x > tracks->x() + tracks->w() )
return;
fl_color( color );
int y = rulers->y() + rulers->h();
int h = this->h() - hscroll->h();
fl_push_clip( Track::width(), y, tracks->w(), h );
fl_line( x, y, x, h );
fl_color( fl_darker( color ) );
fl_line( x - 1, y, x - 1, h );
fl_color( FL_BLACK );
fl_line( x + 1, y, x + 1, h );
/* draw cap */
fl_color( color );
fl_begin_polygon();
fl_vertex( x - 8, y );
fl_vertex( x, y + 8 );
fl_vertex( x + 8, y );
fl_end_polygon();
/* draw cap outline */
fl_color( FL_BLACK );
fl_begin_line();
fl_vertex( x - 8, y );
fl_vertex( x, y + 8 );
fl_vertex( x + 8, y );
fl_end_line();
fl_pop_clip();
}
void
Timeline::draw_playhead ( void )
{
if ( p1 != p2 )
{
draw_cursor( p1, FL_BLUE );
draw_cursor( p2, FL_GREEN );
}
draw_cursor( transport->frame, FL_RED );
}
void
Timeline::redraw_playhead ( void )
{
static nframes_t last_playhead = -1;
if ( last_playhead != transport->frame )
{
redraw_overlay();
last_playhead = transport->frame;
if ( follow_playhead )
xposition( max( 0, ts_to_x( transport->frame ) - ( ( tracks->w() - Track::width() ) >> 1 ) ) );
}
}
/** called so many times a second to redraw the playhead etc. */
void
Timeline::update_cb ( void *arg )
{
Fl::repeat_timeout( UPDATE_FREQ, update_cb, arg );
Timeline *tl = (Timeline *)arg;
tl->redraw_playhead();
}
void
Timeline::draw_overlay ( void )
{
draw_playhead();
if ( ! ( _selection.w && _selection.h ) )
return;
fl_push_clip( tracks->x() + Track::width(), rulers->y() + rulers->h(), tracks->w() - Track::width(), h() - rulers->h() - hscroll->h() );
const Rectangle &r = _selection;
fl_color( FL_BLACK );
fl_line_style( FL_SOLID, 2 );
fl_rect( r.x + 2, r.y + 2, r.w, r.h );
fl_color( FL_MAGENTA );
fl_line_style( FL_DASH, 2 );
fl_rect( r.x, r.y, r.w, r.h );
fl_line( r.x, r.y, r.x + r.w, r.y + r.h );
fl_line( r.x + r.w, r.y, r.x, r.y + r.h );
/* fl_overlay_rect( r.x, r.y, r.w, r.h ); */
fl_line_style( FL_SOLID, 0 );
/* const unsigned char data[] = { 127, 127, 127, 96, */
/* 127, 96, 127, 40 }; */
/* Fl_RGB_Image bi( data, 2, 2, 2 ); */
/* Fl_Image *bi2 = bi.copy( r.w, r.h ); */
/* bi2->draw( r.x, r.y ); */
/* delete bi2; */
/* unsigned char *data = fl_read_image( NULL, r.x, r.y, r.w, r.h, 0 ); */
/* Fl_RGB_Image bi( rect_image, r.w, r.h, 3 ); */
/* bi.color_average( FL_BLACK, 0.50f ); */
/* bi.draw( r.x, r.y ); */
/* delete[] rect_image; */
/* rect_image = NULL; */
fl_pop_clip();
}
// #include "Sequence_Widget.H"
/** select all widgets in inside rectangle /r/ */
void
Timeline::select ( const Rectangle &r )
{
const int Y = r.y;
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( ! ( t->y() > Y + r.h || t->y() + t->h() < Y ) )
t->select( r.x, r.y, r.w, r.h, true, true );
}
}
void
Timeline::delete_selected ( void )
{
Sequence_Widget::delete_selected();
}
void
Timeline::select_none ( void )
{
Sequence_Widget::select_none();
}
int
Timeline::handle ( int m )
{
static Drag *drag = NULL;
switch ( m )
{
case FL_FOCUS:
case FL_UNFOCUS:
// redraw();
return 1;
case FL_KEYBOARD:
case FL_SHORTCUT:
{
if ( Fl::event_state() & ( FL_ALT || FL_CTRL || FL_SHIFT ) )
/* we don't want any keys with modifiers... */
return 0;
switch ( Fl::event_key() )
{
case FL_Delete:
case FL_Home:
case FL_End:
/* keep scrollbar from eating these. */
return 0;
case 'p':
{
int X = Fl::event_x() - Track::width();
if ( X > 0 )
{
transport->locate( xoffset + x_to_ts( X ) );
}
return 1;
}
case '[':
{
int X = Fl::event_x() - Track::width();
if ( X > 0 )
{
p1 = xoffset + x_to_ts( X );
}
return 1;
}
case ']':
{
int X = Fl::event_x() - Track::width();
if ( X > 0 )
{
p2 = xoffset + x_to_ts( X );
}
return 1;
}
default:
return Fl_Overlay_Window::handle( m );
}
return 0;
}
default:
{
if ( m == FL_PUSH )
Fl::focus( this );
int r = Fl_Overlay_Window::handle( m );
if ( m != FL_RELEASE && r )
return r;
const int X = Fl::event_x();
const int Y = Fl::event_y();
switch ( m )
{
case FL_PUSH:
{
// take_focus();
if ( Fl::event_button1() )
{
assert( ! drag );
drag = new Drag( X - x(), Y - y() );
_selection.x = drag->x;
_selection.y = drag->y;
}
else if ( Fl::event_button3() )
{
Fl_Menu_Item menu[] =
{
{ "Add Track", 0, 0, 0, FL_SUBMENU },
{ "Audio", 0, 0, 0 },
{ 0 },
{ 0 },
};
const Fl_Menu_Item *r = menu->popup( X, Y, "Timeline" );
if ( r == &menu[1] )
{
/* FIXME: prompt for I/O config? */
Loggable::block_start();
/* add audio track */
char *name = get_unique_track_name( "Audio" );
Track *t = new Track( name );
Sequence *o = new Audio_Sequence( t );
// new Control_Sequence( t );
add_track( t );
t->track( o );
Loggable::block_end();
}
}
else
return 0;
break;
}
case FL_DRAG:
{
int ox = X - drag->x;
int oy = Y - drag->y;
if ( ox < 0 )
_selection.x = X;
if ( oy < 0 )
_selection.y = Y;
_selection.w = abs( ox );
_selection.h = abs( oy );
break;
}
case FL_RELEASE:
{
delete drag;
drag = NULL;
select( _selection );
_selection.w = _selection.h = 0;
break;
}
default:
return 0;
break;
}
redraw_overlay();
return 1;
}
}
}
void
Timeline::zoom_in ( void )
{
hscroll->zoom_in();
}
void
Timeline::zoom_out ( void )
{
hscroll->zoom_out();
}
/** zoom the display to show /secs/ seconds per screen */
void
Timeline::zoom ( float secs )
{
const int sw = w() - vscroll->w() - Track::width();
/* FIXME: we actually need to set this in the scalebar */
// _fpp = (int)((secs * sample_rate()) / sw);
redraw();
}
Track *
Timeline::track_by_name ( const char *name )
{
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( ! strcmp( name, t->name() ) )
return t;
}
return NULL;
}
char *
Timeline::get_unique_track_name ( const char *name )
{
char pat[256];
strcpy( pat, name );
for ( int i = 1; track_by_name( pat ); ++i )
snprintf( pat, sizeof( pat ), "%s.%d", name, i );
return strdup( pat );
}
void
Timeline::add_track ( Track *track )
{
printf( "added new track to the timeline\n" );
/* FIXME: do locking */
tracks->add( track );
/* FIXME: why is this necessary? doesn't the above add do DAMAGE_CHILD? */
redraw();
}
void
Timeline::remove_track ( Track *track )
{
printf( "removed track from the timeline\n" );
/* FIXME: do locking */
/* FIXME: what to do about track contents? */
tracks->remove( track );
/* FIXME: why is this necessary? doesn't the above add do DAMAGE_CHILD? */
redraw();
}
/** Initiate recording for all armed tracks */
bool
Timeline::record ( void )
{
Loggable::block_start();
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( t->armed() && t->record_ds )
t->record_ds->start( transport->frame );
}
deactivate();
return true;
}
/** stop recording for all armed tracks */
void
Timeline::stop ( void )
{
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( t->armed() && t->record_ds )
t->record_ds->stop( transport->frame );
}
Loggable::block_end();
activate();
}
/**********/
/* Engine */
/**********/
/** call process() on each track header */
nframes_t
Timeline::process ( nframes_t nframes )
{
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
t->process( nframes );
}
/* FIXME: BOGUS */
return nframes;
}
/* THREAD: RT */
void
Timeline::seek ( nframes_t frame )
{
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
t->seek( frame );
}
}
/* THREAD: RT */
int
Timeline::seek_pending ( void )
{
int r = 0;
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( t->playback_ds )
r += t->playback_ds->buffer_percent() < 50;
}
return r;
}
/* FIXME: shouldn't these belong to the engine? */
int
Timeline::total_input_buffer_percent ( void )
{
int r = 0;
int cnt = 0;
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( t->record_ds )
{
++cnt;
r += t->record_ds->buffer_percent();
}
}
if ( ! cnt )
return 0;
return r / cnt;
}
int
Timeline::total_output_buffer_percent ( void )
{
int r = 0;
int cnt = 0;
for ( int i = tracks->children(); i-- ; )
{
Track *t = (Track*)tracks->child( i );
if ( t->playback_ds )
{
++cnt;
r += t->playback_ds->buffer_percent();
}
}
if ( ! cnt )
return 0;
return r / cnt;
}
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