non/Timeline/Region.H

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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. */
/*******************************************************************************/
#pragma once
#include "Audio_File.H"
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#include "Sequence.H"
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#include "Timeline.H"
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/* Regions are "virtual" FLTK widgets; this is necessary because the
* dimensions of real FLTK widgets are limited to 16-bits, which is
* far too little for our purposes */
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#include "Sequence_Widget.H"
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#include "Loggable.H"
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class Region : public Sequence_Widget
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{
public:
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static bool inherit_track_color;
struct Fade
{
enum fade_type_e { Linear = 0, Sigmoid, Logarithmic, Parabolic };
enum fade_dir_e { In, Out };
fade_type_e type;
nframes_t length;
Fade ( )
{
type = Linear;
length = 0;
}
bool
operator< ( const Fade &rhs ) const
{
return length < rhs.length;
}
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float increment ( void ) const
{
return 1.0f / (float)length;
}
/** Return gain for frame /index/ of /nframes/ on a gain curve
* of type /type/.*/
/* FIXME: calling a function per sample is bad, switching on
* type mid fade is bad. */
inline float
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gain ( const float fi ) const
{
switch ( type )
{
case Linear:
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return fi;
case Sigmoid:
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return (1.0f - cos( fi * M_PI )) / 2.0f;
case Logarithmic:
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return pow( 0.1f, (1.0f - fi) * 3.0f );
case Parabolic:
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return 1.0f - (1.0f - fi) * (1.0f - fi);
default:
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return 1.0f;
}
}
void apply ( sample_t *buf, fade_dir_e dir, long start, nframes_t end, nframes_t nframes ) const;
};
/* struct Fade_In : public Fade; */
/* struct Fade_Out : public Fade; */
private:
Audio_File *_clip; /* clip this region represents */
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float _scale; /* amplitude adjustment */
Fade _fade_in;
Fade _fade_out;
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friend class Track; /* for _clip */
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protected:
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// const char *class_name ( void ) { return "Region"; }
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virtual void get ( Log_Entry &e ) const
{
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e.add( ":source", _clip ? _clip->name() : "" );
e.add( ":gain", _scale );
e.add( ":fade-in-type", _fade_in.type );
e.add( ":fade-in-duration", _fade_in.length );
e.add( ":fade-out-type", _fade_out.type );
e.add( ":fade-out-duration", _fade_out.length );
e.add( ":color", (int)_box_color );
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Sequence_Widget::get( e );
}
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void
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set ( Log_Entry &e )
{
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for ( int i = 0; i < e.size(); ++i )
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{
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const char *s, *v;
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e.get( i, &s, &v );
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if ( ! strcmp( s, ":gain" ) )
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_scale = atof( v );
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else if ( ! strcmp( s, ":color" ) )
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_box_color = (Fl_Color)atoi( v );
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else if ( ! strcmp( s, ":fade-in-type" ) )
_fade_in.type = (Fade::fade_type_e)atoi( v );
else if ( ! strcmp( s, ":fade-in-duration" ) )
_fade_in.length = atoll( v );
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else if ( ! strcmp( s, ":fade-out-type" ) )
_fade_out.type = (Fade::fade_type_e)atoi( v );
else if ( ! strcmp( s, ":fade-out-duration" ) )
_fade_out.length = atoll( v );
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else if ( ! strcmp( s, ":source" ) )
{
if ( ! ( _clip = Audio_File::from_file( v ) ) )
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{
printf( "Grave error: could not open source \"%s\"\n", v );
}
}
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}
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Sequence_Widget::set( e );
}
public:
static Fl_Boxtype _box;
static Fl_Color _selection_color;
static Fl_Color selection_color ( void ) { return _selection_color; }
static void selection_color ( Fl_Color v ) { _selection_color = v; }
enum trim_e { NO, LEFT, RIGHT };
void trim ( enum trim_e t, int X );
void init ( void );
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Region ( )
{
init();
}
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bool current ( void ) const { return this == belowmouse(); }
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public:
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const char *source_name ( void ) const { return _clip->name(); }
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LOG_CREATE_FUNC( Region );
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Sequence_Widget *clone ( const Sequence_Widget *r );
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~Region ( )
{
log_destroy();
}
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Fl_Boxtype box ( void ) const { return Region::_box; }
Fl_Align align ( void ) const { return (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM /*| FL_ALIGN_CLIP*/ | FL_ALIGN_INSIDE); }
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Region ( const Region & rhs );
Region ( Audio_File *c );
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Region ( Audio_File *c, Sequence *t, nframes_t o );
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int handle ( int m );
void draw_fade ( const Fade &fade, Fade::fade_dir_e dir, bool filled, int X, int W );
void draw_box( void );
void draw ( void );
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void resize ( void );
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void normalize ( void );
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/* Engine */
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nframes_t read ( sample_t *buf, nframes_t pos, nframes_t nframes, int channel ) const;
nframes_t write ( nframes_t nframes );
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void prepare ( void );
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bool finalize ( void );
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};