non/timeline/src/Audio_Region.H

177 lines
5.6 KiB
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. */
/*******************************************************************************/
#pragma once
#include "Timeline.H"
#include "Sequence_Region.H"
class Audio_File;
class Fl_Menu_;
class Fl_Menu_Button;
class Audio_Region : public Sequence_Region
{
/* not permitted */
Audio_Region & operator = ( const Audio_Region &rhs );
static void peaks_ready_callback ( void *v );
public:
static bool inherit_track_color;
static bool show_box;
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;
}
double increment ( void ) const
{
return 1.0f / 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
gain ( const float fi ) const
{
switch ( type )
{
case Linear:
return fi;
case Sigmoid:
return (1.0f - cosf( fi * M_PI )) * 0.5f;
case Logarithmic:
return powf( 0.1f, (1.0f - fi) * 3.0f );
case Parabolic:
return 1.0f - (1.0f - fi) * (1.0f - fi);
default:
return 1.0f;
}
}
void apply ( sample_t *buf, fade_dir_e dir, nframes_t start, nframes_t nframes ) const;
void apply_interleaved ( sample_t *buf, fade_dir_e dir, nframes_t start, nframes_t nframes, int channels ) const;
};
/* struct Fade_In : public Fade; */
/* struct Fade_Out : public Fade; */
private:
Audio_File *_clip; /* clip this region represents */
float _adjusting_gain;
float _scale; /* amplitude adjustment */
Fade _fade_in;
Fade _fade_out;
nframes_t _loop; /* loop point */
friend class Track; /* for _clip */
Fl_Menu_Button & menu ( void );
static void menu_cb ( Fl_Widget *w, void *v );
void menu_cb ( const Fl_Menu_ *m );
void draw_fade ( const Fade &fade, Fade::fade_dir_e dir, bool filled, int X, int W );
protected:
virtual void get ( Log_Entry &e ) const;
virtual void set ( Log_Entry &e );
virtual void draw_label ( const char *label, Fl_Align align, Fl_Color color=(Fl_Color)0, int xo=0, int yo=0 )
{
Sequence_Widget::draw_label( label, align );
}
virtual void draw_label ( void );
int handle ( int m );
void draw_box ( void );
void draw ( void );
void resize ( void );
public:
LOG_CREATE_FUNC( Audio_Region );
SEQUENCE_WIDGET_CLONE_FUNC( Audio_Region );
static Fl_Boxtype _box;
static Fl_Color _selection_color;
Fl_Color selection_color ( void ) const { return _selection_color; }
void selection_color ( Fl_Color v ) { _selection_color = v; }
void init ( void );
Audio_Region ( )
{
init();
}
bool current ( void ) const { return this == belowmouse(); }
const char * source_name ( void ) const;
Audio_Region ( const Audio_Region & rhs );
Audio_Region ( Audio_File *c );
Audio_Region ( Audio_File *c, Sequence *t, nframes_t o );
~Audio_Region ( );
Fl_Boxtype box ( void ) const { return Audio_Region::_box; }
Fl_Align align ( void ) const { return (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM | FL_ALIGN_INSIDE | FL_ALIGN_CLIP ); }
void normalize ( void );
void split ( nframes_t where );
bool recording ( void ) const;
virtual Fl_Color actual_box_color ( void ) const;
/* Engine */
nframes_t read ( sample_t *buf, bool buf_is_empty, nframes_t pos, nframes_t nframes, int out_channels ) const;
nframes_t write ( nframes_t nframes );
void prepare ( void );
bool finalize ( nframes_t frame );
};