102 lines
3.0 KiB
C
102 lines
3.0 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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#include <stdio.h>
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#include <FL/Enumerations.H>
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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#include "Timeline.H"
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#include "Audio_File.H"
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#include <math.h>
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/** draw a portion of /clip/'s waveform. coordinates are the portion to draw */
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void
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draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, int channel, nframes_t _start, nframes_t _end, float _scale, Fl_Color color )
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{
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fl_push_clip( X, Y, W, H );
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int j;
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int start = timeline->ts_to_x( _start );
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const Peaks *pk = _clip->peaks( channel );
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pk->fill_buffer( _start, _start + timeline->x_to_ts( W ) );
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j = start;
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for ( int x = X; x < X + W; ++x, ++j )
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{
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Peak p = (*pk)[ j ];
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int mid = Y + (H / 2);
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// FIXME: cache this stuff.
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fl_color( fl_color_average( FL_RED, color, fabs( p.max - p.min ) ) );
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p.max *= _scale;
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p.min *= _scale;
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if ( p.min < -1.0 || p.max > 1.0 )
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fl_color( FL_RED );
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fl_line( x, mid + (H / 2 * p.min), x, mid + (H / 2 * p.max) );
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}
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fl_color( fl_darker( fl_darker( color ) ) );
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fl_line_style( FL_SOLID, 2 );
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fl_begin_line();
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j = start;
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for ( int x = X; x < X + W; ++x, ++j )
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{
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Peak p = (*pk)[ j ];
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p.min *= _scale;
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fl_vertex( x, Y + (H / 2) + ((float)H / 2 * p.min ));
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}
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fl_end_line();
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fl_begin_line();
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j = start;
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for ( int x = X; x < X + W; ++x, ++j )
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{
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Peak p = (*pk)[ j ];
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p.max *= _scale;
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fl_vertex( x, Y + (H / 2) + ((float)H / 2 * p.max ));
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}
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fl_end_line();
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fl_line_style( FL_SOLID, 0 );
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fl_pop_clip();
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}
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