non/Timeline/Waveform.C

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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. */
/*******************************************************************************/
#include <stdio.h>
#include <FL/Enumerations.H>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
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#include "Timeline.H"
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#include "Waveform.H"
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#include <math.h>
bool Waveform::fill = true;
bool Waveform::outline = true;
bool Waveform::vary_color = true;
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bool Waveform::logarithmic = true;
/* TODO: split the variations into separate functions. eg, plain,
* outlined, filled, polygonal, rectified. */
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/* TODO: this should be made completely independent of /timeline/ so that it can be used for other purposes (file previews) */
/** draw a portion of /clip/'s waveform. coordinates are the portion to draw */
void
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Waveform::draw ( int X, int Y, int W, int H,
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Peak *pbuf, int peaks, int skip,
Fl_Color color )
{
fl_push_clip( X, Y, W, H );
int j;
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// int start = timeline->ts_to_x( _r->start ) + (X - ox);
int start = 0;
const int halfheight = H / 2;
const int mid = Y + halfheight;
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W = min( peaks, W );
if ( Waveform::fill )
{
j = start;
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for ( int x = X; x < X + W; ++x, j += skip )
{
const Peak p = pbuf[ j ];
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const float diff = fabs( p.max - p.min );
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/* if ( Waveform::logarithmic ) */
/* { */
/* p.max = 10.0f * log10f( p.max ); */
/* p.min = 10.0f * log10f( p.min ); */
/* } */
if ( diff > 2.0f )
fl_color( FL_RED );
else
if ( Waveform::vary_color )
fl_color( fl_color_average( FL_WHITE, color, diff / 2.0f ) );
else
fl_color( color );
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const int ty = mid + ( halfheight * p.min );
const int by = mid + ( halfheight * p.max );
fl_line( x, ty, x, by );
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/* if ( outline ) */
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/* { */
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/* fl_color( fl_darker( fl_darker( color ) ) ); */
/* fl_line( x, ty - 2, x, ty ); */
/* fl_line( x, by + 2, x, by ); */
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/* } */
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}
}
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const int ty = Y + halfheight;
if ( Waveform::outline )
{
fl_color( fl_darker( fl_darker( color ) ) );
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fl_line_style( FL_SOLID, 2 );
fl_begin_line();
j = start;
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for ( int x = X; x < X + W; ++x, j += skip )
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fl_vertex( x, ty + ( halfheight * pbuf[ j ].min ) );
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fl_end_line();
fl_begin_line();
j = start;
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for ( int x = X; x < X + W; ++x, j += skip )
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fl_vertex( x, ty + ( halfheight * pbuf[ j ].max ) );
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fl_end_line();
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fl_line_style( FL_SOLID, 0 );
}
fl_pop_clip();
}