Move Engine portion of Control_Sequence into Engine/.
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Jonathan Moore Liles
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ab7cab34bd
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331078c3b2
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@ -19,19 +19,22 @@
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#include <FL/fl_ask.H>
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#include <list>
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using namespace std;
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using std::list;
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#include "Control_Sequence.H"
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#include "Track.H"
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#include "Engine/Port.H"
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#include "Engine/Engine.H" // for lock()
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#include "Transport.H" // for transport->frame
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bool Control_Sequence::draw_with_gradient = true;
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bool Control_Sequence::draw_with_polygon = true;
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bool Control_Sequence::draw_with_grid = true;
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Control_Sequence::Control_Sequence ( Track *track ) : Sequence( 0 )
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{
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init();
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@ -76,6 +79,8 @@ Control_Sequence::init ( void )
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color( fl_darker( FL_YELLOW ) );
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}
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void
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Control_Sequence::get ( Log_Entry &e ) const
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{
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@ -333,76 +338,3 @@ Control_Sequence::handle ( int m )
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return 0;
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}
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}
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/**********/
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/* Engine */
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/**********/
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static inline float
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linear_interpolate ( float y1, float y2, float mu )
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{
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// return y1 + mu * ( y2 - y1 );
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return y1 * ( 1.0f - mu ) + y2 * mu;
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}
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static inline float
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sigmoid_interpolate ( float y1, float y2, float mu )
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{
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return linear_interpolate( y1, y2, ( 1 - cos( mu * M_PI ) ) / 2 );
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}
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/* THREAD: ?? */
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/** fill buf with /nframes/ of interpolated control curve values
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* starting at /frame/ */
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nframes_t
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Control_Sequence::play ( sample_t *buf, nframes_t frame, nframes_t nframes )
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{
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Control_Point *p2, *p1 = (Control_Point*)&_widgets.front();
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nframes_t n = nframes;
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for ( list <Sequence_Widget *>::const_iterator i = _widgets.begin();
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i != _widgets.end(); ++i, p1 = p2 )
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{
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p2 = (Control_Point*)(*i);
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if ( p2->when() < frame )
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continue;
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/* do incremental linear interpolation */
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const nframes_t len = p2->when() - p1->when();
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/* scale to -1.0 to 1.0 */
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const float y1 = 1.0f - ( 2.0f * p1->control() );
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const float y2 = 1.0f - ( 2.0f * p2->control() );
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const nframes_t start = frame - p1->when();
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const float incr = ( y2 - y1 ) / (float)len;
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float v = y1 + start * incr;
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for ( nframes_t i = start; i < len && n--; ++i, v += incr )
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*(buf++) = v;
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}
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return nframes - n;
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}
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/* THREAD: RT */
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nframes_t
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Control_Sequence::process ( nframes_t nframes )
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{
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if ( _output->connected() ) /* don't waste CPU on disconnected ports */
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{
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void *buf = _output->buffer( nframes );
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return play( (sample_t*)buf, transport->frame, nframes );
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}
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else
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return nframes;
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}
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@ -0,0 +1,100 @@
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#include "../Control_Sequence.H"
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#include "../Transport.H" // for ->frame
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#include <list>
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using std::list;
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/**********/
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/* Engine */
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/**********/
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static inline float
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linear_interpolate ( float y1, float y2, float mu )
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{
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// return y1 + mu * ( y2 - y1 );
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return y1 * ( 1.0f - mu ) + y2 * mu;
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}
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static inline float
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sigmoid_interpolate ( float y1, float y2, float mu )
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{
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return linear_interpolate( y1, y2, ( 1 - cos( mu * M_PI ) ) / 2 );
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}
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/* THREAD: RT */
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/** fill buf with /nframes/ of interpolated control curve values
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* starting at /frame/ */
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nframes_t
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Control_Sequence::play ( sample_t *buf, nframes_t frame, nframes_t nframes )
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{
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Control_Point *p2, *p1 = (Control_Point*)&_widgets.front();
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nframes_t n = nframes;
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for ( list <Sequence_Widget *>::const_iterator i = _widgets.begin();
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i != _widgets.end(); ++i, p1 = p2 )
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{
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p2 = (Control_Point*)(*i);
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if ( p2->when() < frame )
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continue;
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/* do incremental linear interpolation */
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const nframes_t len = p2->when() - p1->when();
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/* scale to -1.0 to 1.0 */
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const float y1 = 1.0f - ( 2.0f * p1->control() );
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const float y2 = 1.0f - ( 2.0f * p2->control() );
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const nframes_t start = frame - p1->when();
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const float incr = ( y2 - y1 ) / (float)len;
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float v = y1 + start * incr;
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for ( nframes_t i = start; i < len && n--; ++i, v += incr )
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*(buf++) = v;
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}
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return nframes - n;
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}
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/* THREAD: RT */
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nframes_t
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Control_Sequence::process ( nframes_t nframes )
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{
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if ( _output->connected() ) /* don't waste CPU on disconnected ports */
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{
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void *buf = _output->buffer( nframes );
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return play( (sample_t*)buf, transport->frame, nframes );
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}
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else
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return nframes;
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}
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