non/timeline/src/Transport.C

/*******************************************************************************/
/* 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.  */
/*******************************************************************************/

/* Controls the audio transport */

#include "Transport.H"
#include "Timeline.H"

#include "Engine/Engine.H"



Transport::Transport ( int X, int Y, int W, int H, const char *L )
    : Fl_Flowpack( X, Y, W, H, L )
{
    recording = false;
    rolling = false;
    _stop_disables_record = true;

    bar = 0;
    beat = 0;
    tick = 0;
    beats_per_minute = 120;
    ticks_per_beat = 1920;
    beat_type = 4;
    beats_per_bar = 4;
    next_time = 0;
    frame_time =0;
    frame_rate = 48000;
    frame = 0;

    { _home_button = new Fl_Button(5, 5, 40, 44, "@|<");
    } // Fl_Button* _home_button
    { _end_button = new Fl_Button(45, 5, 40, 44, "@>|");
    } // Fl_Button* _end_button
    { _play_button = new Fl_Button(85, 5, 40, 44, "@>");
    } // Fl_Button* _play_button
    { _record_button = new Fl_Button(130, 5, 40, 44, "@circle");
    } // Fl_Button* _record_button
    { _punch_button = new Fl_Button(175, 5, 38, 21, "Punch");
        _punch_button->type(1);
        _punch_button->labelsize(10);
    } // Fl_Button* _punch_button
    { _loop_button = new Fl_Button(175, 20, 38, 21, "Loop");
        _loop_button->type(1);
        _loop_button->labelsize(10);
    } // Fl_Button* _loop_button
    { _new_take_button = new Fl_Button(225, 5, 60, 21, "New Take");
        _new_take_button->type(1);
        _new_take_button->labelsize(10);
    } // Fl_Button* _new_take_button
    { _freewheel_button = new Fl_Button(225, 5, 60, 21, "Freewheel");
        _freewheel_button->type(1);
        _freewheel_button->labelsize(10);
    } // Fl_Button* _new_take_button
    end();

    Fl_Button *o;

    o = _home_button;
    o->callback( cb_button, this );
    o->shortcut( FL_Home );

    o = _end_button;
    o->callback( cb_button, this );
    o->shortcut( FL_End );

    o = _play_button;
    o->callback( cb_button, this );
    o->shortcut( ' ' );

    o = _record_button;
    o->type( FL_TOGGLE_BUTTON );
    o->shortcut( 'R' );
    o->callback( cb_button, this );
    o->color2( FL_RED );
    o->when( FL_WHEN_CHANGED );

    o = _punch_button;
    o->type( FL_TOGGLE_BUTTON );
    o->shortcut( 'P' );
    o->callback( cb_button, this );
    o->when( FL_WHEN_CHANGED );
    o->color2( fl_color_average( FL_GRAY, FL_RED, 0.50 ));
    o->tooltip( "Toggle punch in/out recording mode" );
    
    o = _loop_button;
    o->type( FL_TOGGLE_BUTTON );
    o->shortcut( 'L' );
    o->callback( cb_button, this );
    o->when( FL_WHEN_CHANGED );
    o->color2( fl_color_average( FL_GRAY, FL_GREEN, 0.50 ));
    o->tooltip( "Toggle looped playback" );

    o = _new_take_button;
    o->type( FL_TOGGLE_BUTTON );
    o->shortcut( 'T' );
    o->callback( cb_button, this );
    o->when( FL_WHEN_CHANGED );
    o->color2( fl_color_average( FL_GRAY, FL_YELLOW, 0.50 ) );
    o->tooltip( "Toggle automatic creation of new takes for armed tracks" );

    o = _freewheel_button;
    o->type( FL_TOGGLE_BUTTON );
    o->shortcut( 'T' );
    o->callback( cb_button, this );
    o->when( FL_WHEN_CHANGED );
    o->color2( fl_color_average( FL_GRAY, FL_BLUE, 0.50 ) );
    o->tooltip( "When active, the next playback will be done in freewheeling mode" );

    type( Fl_Pack::HORIZONTAL );
    flowdown( true );
    vspacing( 1 );
    hspacing( 1 );
             
    dolayout();
}



void
Transport::cb_button ( Fl_Widget *w, void *v )
{
    ((Transport*)v)->cb_button( w );
}

void
Transport::update_record_state ( void )
{
    Fl_Button *w = _record_button;

    /* handle display */
    if ( w->value() )
        w->labelcolor( FL_BACKGROUND_COLOR );
    else
        w->labelcolor( FL_FOREGROUND_COLOR );

    w->redraw();

    /* this covers the case where the record toggle button is
     * pressed while the transport is already rolling. Recording
     * should begin or end on the next frame */
    if ( rolling )
    {
        if ( ! recording && w->value() )
        {
            timeline->record();
            recording = true;
        }
        else if ( recording )
        {
            timeline->stop();
            recording = false;
        }
    }
}

/** cb_button
 * common handler for all transport buttons */
void
Transport::cb_button ( Fl_Widget *w )
{
    if ( w == _home_button )
        locate( timeline->playback_home() );
    else if ( w == _end_button )
        locate( timeline->playback_end() );
    else if ( w == _play_button )
        toggle();
    else if ( w == _record_button )
        update_record_state();
    else if ( w == _punch_button )
        timeline->redraw();
}

void
Transport::toggle_record ( void )
{
    _record_button->value( ! _record_button->value() );
     update_record_state();
}

bool
Transport::freewheel_enabled ( void ) const
{
    return _freewheel_button->value();
}

bool
Transport::rec_enabled ( void ) const
{
    return _record_button->value();
}

bool
Transport::punch_enabled ( void ) const
{
    return _punch_button->value();
}

bool
Transport::loop_enabled ( void ) const
{
    return _loop_button->value();
}

void
Transport::loop_enabled ( bool b )
{
    _loop_button->value( b );
}

bool
Transport::automatically_create_takes ( void ) const
{
    return _new_take_button->value();
}

void
Transport::automatically_create_takes ( bool b )
{
    _new_take_button->value( b );
}



int
Transport::handle ( int m )
{
    /* FIXME: hack to avoid stealing focus */

    if ( m == FL_FOCUS  )
        return 0;
    else
        return Fl_Flowpack::handle( m );
}

/***********/
/* Control */
/***********/

void
Transport::poll ( void )
{

    jack_transport_state_t ts;

    ts = engine->transport_query( this );

    rolling = ts == JackTransportRolling;
}

void
Transport::locate ( nframes_t frame )
{
    if ( ! engine )
        return;

    if ( ! recording )
    {
        // don't allow seeking while record is in progress
        engine->transport_locate( frame );

        /* so there isn't a race waiting for the transport to sync */
        this->frame = frame;
    }

    timeline->_created_new_takes = false;
}


void
Transport::start ( void )
{
//    MESSAGE( "Starting transport" );
    if ( _record_button->value() )
    {
        rolling = true;
        update_record_state();
    }

    if ( engine )
    {
        if ( _freewheel_button->value() )
            engine->freewheeling( true );

        engine->transport_start();
    }
}

void
Transport::stop ( void )
{
//    MESSAGE( "Stopping transport" );
    if ( _record_button->value() )
    {
        if ( _stop_disables_record )
            _record_button->value( 0 );

        timeline->_created_new_takes = false;

        update_record_state();
    }

    if ( engine )
    {
        engine->transport_stop();
        
        if ( _freewheel_button->value() )
        {
            engine->freewheeling( false );
            _freewheel_button->value( false );
        }
    }
}

void
Transport::toggle ( void )
{
    if ( rolling )
        stop();
    else
        start();
}