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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* samplesorter.cc
*
* Mon Nov 30 07:45:58 CET 2009
* Copyright 2009 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "samplesorter.h"
#include <QPainter>
#include <QPaintEvent>
#include <math.h>
#ifndef MAXFLOAT
#define MAXFLOAT (3.40282347e+38F)
#endif
#define NUM_LEVELS 6
SampleSorter::SampleSorter()
{
data = NULL;
size = 0;
attlen = 666; // Magical constants needs biblical proportions...
}
void SampleSorter::setWavData(const float *data, size_t size)
{
this->data = data;
this->size = size;
resort();
}
void SampleSorter::setSelections(Selections s)
{
_selections = s;
resort();
}
int SampleSorter::attackLength()
{
return attlen;
}
void SampleSorter::setAttackLength(int len)
{
attlen = len;
resort();
}
Selections SampleSorter::selections()
{
Selections s;
int j = 0;
QMap<float, Selection>::iterator i = sorted.begin();
while(i != sorted.end()) {
s[j++] = i.value();
i++;
}
return s;
}
QVector<int> SampleSorter::levels()
{
QVector<int> lvls;
int idx = 0;
float next = min;
QMap<float, Selection>::iterator i = sorted.begin();
while(i != sorted.end()) {
if(i.key() >= next) {
lvls.push_back(idx);
next += (max - min) / NUM_LEVELS;
}
i++;
idx++;
}
return lvls;
}
void SampleSorter::resort()
{
sorted.clear();
min = MAXFLOAT;
max = 0.0;
QMap<int, Selection>::iterator i = _selections.begin();
while(i != _selections.end()) {
float energy = 0.0;
Selection s = i.value();
for(size_t idx = s.from;
(idx < (size_t)s.from + (size_t)attackLength()) && (idx < (size_t)s.to) && (idx < size);
idx++) {
energy += data[idx] * data[idx];
}
while(sorted.find(energy) != sorted.end()) {
energy += 1; // Make sure that the key is unique.
}
sorted[energy] = i.value();
if(energy < min) min = energy;
if(energy > max) max = energy;
i++;
}
update();
}
void SampleSorter::setActiveSelection(Selection s)
{
sel = s;
update();
}
#define MAP(p) (height()-(int)(p*((float)height()/(float)width())))
static void drawCircle(QPainter &p, int x, int y)
{
p.drawEllipse(x-2, y-2, 4, 4);
}
void SampleSorter::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
QColor colBg = QColor(180, 200, 180);
QColor colFg = QColor(160, 180, 160);
QColor colPt = QColor(255, 100, 100);
QColor colPtSel = QColor(255, 255, 100);
painter.setPen(colBg);
painter.setBrush(colBg);
painter.drawRect(event->rect());
painter.setPen(colFg);
painter.drawLine(0,height(),width(),0);
if(sorted.isEmpty()) return;
QMap<float, Selection>::iterator i = sorted.begin();
while(i != sorted.end()) {
if(sel.to == i.value().to && sel.from == i.value().from) painter.setPen(colPtSel);
else painter.setPen(colPt);
float x = (i.key()/max)*(float)width();
drawCircle(painter, x, MAP(x));
i++;
}
}
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