282 lines
7.8 KiB
C++
282 lines
7.8 KiB
C++
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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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#pragma once
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#include "Audio_File.H"
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#include "Track.H"
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#include "Timeline.H"
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/* Regions are "virtual" FLTK widgets; this is necessary because the
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* dimensions of real FLTK widgets are limited to 16-bits, which is
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* far too little for our purposes */
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#include "Track_Widget.H"
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#include "Loggable.H"
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class Region;
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/* Base for engine. Just to maintain state. Must be free of FLTK
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* stuff */
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class Region_Base : public Track_Widget
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{
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public:
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struct Fade
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{
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enum fade_type_e { Linear, Cosine, Logarithmic, Parabolic };
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enum fade_dir_e { In, Out };
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fade_type_e type;
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nframes_t length;
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Fade ( )
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{
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type = Linear;
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length = 0;
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}
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bool
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operator< ( const Fade &rhs ) const
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{
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return length < rhs.length;
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}
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/** Return gain for frame /index/ of /nframes/ on a gain curve
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* of type /type/.*/
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/* FIXME: calling a function per sample is bad, switching on
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* type mid fade is bad. */
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inline float
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gain ( nframes_t index ) const
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{
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float g;
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const float fi = index / (float)length;
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switch ( type )
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{
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case Linear:
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g = fi;
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break;
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case Cosine:
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// g = sin( fi * M_PI / 2 );
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g = (1.0f - cos( fi * M_PI )) / 2.0f;
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break;
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case Logarithmic:
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g = pow( 0.1f, (1.0f - fi) * 5.0f );
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break;
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case Parabolic:
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g = 1.0f - (1.0f - fi) * (1.0f - fi);
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break;
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default:
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g = 1.0f;
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}
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return g;
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}
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void apply ( sample_t *buf, fade_dir_e dir, long start, nframes_t end, nframes_t nframes ) const;
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};
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/* struct Fade_In : public Fade; */
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/* struct Fade_Out : public Fade; */
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private:
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Audio_File *_clip; /* clip this region represents */
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float _scale; /* amplitude adjustment */
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Fade _fade_in;
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Fade _fade_out;
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protected:
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const char *class_name ( void ) { return "Region"; }
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char ** get ( void )
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{
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// char *r;
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char **sa = (char**)malloc( sizeof( char* ) * 8 );
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int i = 0;
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asprintf( &sa[ i++ ], ":source \"%s\"", _clip ? _clip->name() : "" );
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asprintf( &sa[ i++ ], ":track 0x%X", _track ? _track->id() : 0 );
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asprintf( &sa[ i++ ], ":x %lu", _r->offset );
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asprintf( &sa[ i++ ], ":l %lu", _r->start );
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asprintf( &sa[ i++ ], ":r %lu", _r->end );
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asprintf( &sa[ i++ ], ":selected %d", selected() );
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asprintf( &sa[ i++ ], ":gain %f", _scale );
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sa[ i ] = NULL;
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return sa;
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}
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void
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set ( char **sa )
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{
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for ( int i = 0; sa[i]; ++i )
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{
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char *s = sa[i];
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strtok( s, " " );
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char *v = s + strlen( s ) + 1;
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if ( *v == '"' )
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{
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v++;
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v[ strlen( v ) - 2 ] = '\0';
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}
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if ( ! strcmp( s, ":x" ) )
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_r->offset = atol( v );
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else if ( ! strcmp( s, ":l" ) )
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_r->start = atol( v );
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else if ( ! strcmp( s, ":r" ) )
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_r->end = atol( v );
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else if ( ! strcmp( s, ":selected" ) )
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{
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if ( atoi( v ) )
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select();
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else
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deselect();
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}
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else if ( ! strcmp( s, ":gain" ) )
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_scale = atof( v );
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else if ( ! strcmp( s, ":source" ) )
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{
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if ( ! ( _clip = Audio_File::from_file( v ) ) )
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{
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printf( "Grave error: could not open source \"%s\"\n", v );
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}
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}
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else if ( ! strcmp( s, ":track" ) )
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{
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int i;
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sscanf( v, "%X", &i );
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Track *t = (Track*)Loggable::find( i );
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assert( t );
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t->add( this );
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}
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free( s );
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}
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free( sa );
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#ifndef ENGINE
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if ( _track )
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_track->redraw();
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#endif
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}
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public:
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Region_Base ( )
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{
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_clip = NULL;
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_scale = 1.0f;
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}
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#ifdef ENGINE
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/* for loggable */
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static Loggable *
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create ( char **sa )
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{
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Region_Base *r = new Region_Base;
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r->set( sa );
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return (Loggable *)r;
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}
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#else
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friend class Region;
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#endif
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};
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#ifndef ENGINE
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class Region : public Region_Base
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{
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static Fl_Boxtype _box;
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static Fl_Color _selection_color;
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static Fl_Color selection_color ( void ) { return _selection_color; }
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static void selection_color ( Fl_Color v ) { _selection_color = v; }
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enum trim_e { NO, LEFT, RIGHT };
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void trim ( enum trim_e t, int X );
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void init ( void );
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Region ( )
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{
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init();
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}
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bool current ( void ) const { return this == belowmouse(); }
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public:
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static Loggable *
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create ( char **sa )
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{
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Region *r = new Region;
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r->set( sa );
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return (Loggable *)r;
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}
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Track_Widget *clone ( const Track_Widget *r );
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~Region ( )
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{
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log_destroy();
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}
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Fl_Boxtype box ( void ) const { return Region::_box; }
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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 );
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Region ( Audio_File *c );
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Region ( Audio_File *c, Track *t, nframes_t o );
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int handle ( int m );
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void draw_fade ( const Fade &fade, Fade::fade_dir_e dir, int X, int W );
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void draw_box( int X, int Y, int W, int H );
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void draw ( int X, int Y, int W, int H );
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void resize ( void );
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void normalize ( void );
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nframes_t read ( sample_t *buf, nframes_t pos, nframes_t nframes, int channel ) const;
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};
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#endif
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