186 lines
6.6 KiB
C++
186 lines
6.6 KiB
C++
/* This file is part of Clementine.
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Copyright 2003, Mark Kretschmann <markey@web.de>
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Copyright 2009-2010, David Sansome <davidsansome@gmail.com>
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Copyright 2014, Alibek Omarov <a1ba.omarov@gmail.com>
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Copyright 2014, Mark Furneaux <mark@romaco.ca>
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Copyright 2014, Krzysztof Sobiecki <sobkas@gmail.com>
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Copyright 2014, John Maguire <john.maguire@gmail.com>
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Clementine is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Clementine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Original Author: Mark Kretschmann <markey@web.de> 2003
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*/
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#include "baranalyzer.h"
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#include <cmath>
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#include <QtDebug>
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#include <QPainter>
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using Analyzer::Scope;
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const char* BarAnalyzer::kName =
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QT_TRANSLATE_NOOP("AnalyzerContainer", "Bar analyzer");
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BarAnalyzer::BarAnalyzer(QWidget* parent) : Analyzer::Base(parent, 8) {
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// roof pixmaps don't depend on size() so we do in the ctor
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m_bg = parent->palette().color(QPalette::Background);
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QColor fg(parent->palette().color(QPalette::Highlight).lighter(150));
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double dr = static_cast<double>(m_bg.red() - fg.red()) /
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(NUM_ROOFS - 1); // -1 because we start loop below at 0
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double dg = static_cast<double>(m_bg.green() - fg.green()) / (NUM_ROOFS - 1);
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double db = static_cast<double>(m_bg.blue() - fg.blue()) / (NUM_ROOFS - 1);
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for (uint i = 0; i < NUM_ROOFS; ++i) {
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m_pixRoof[i] = QPixmap(COLUMN_WIDTH, 1);
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m_pixRoof[i].fill(QColor(fg.red() + static_cast<int>(dr * i), fg.green() + static_cast<int>(dg * i),
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fg.blue() + static_cast<int>(db * i)));
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}
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}
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void BarAnalyzer::resizeEvent(QResizeEvent* e) { init(); }
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// METHODS =====================================================
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void BarAnalyzer::init() {
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const double MAX_AMPLITUDE = 1.0;
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const double F = static_cast<double>(height() - 2) / (log10(255) * MAX_AMPLITUDE);
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BAND_COUNT = width() / 5;
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MAX_DOWN = static_cast<int>(0 - (qMax(1, height() / 50)));
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MAX_UP = static_cast<int>(qMax(1, height() / 25));
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barVector.resize(BAND_COUNT, 0);
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roofVector.resize(BAND_COUNT, height() - 5);
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roofVelocityVector.resize(BAND_COUNT, ROOF_VELOCITY_REDUCTION_FACTOR);
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m_roofMem.resize(BAND_COUNT);
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m_scope.resize(BAND_COUNT);
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// generate a list of values that express amplitudes in range 0-MAX_AMP as
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// ints from 0-height() on log scale
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for (uint x = 0; x < 256; ++x) {
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m_lvlMapper[x] = static_cast<uint>(F * log10(x + 1));
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}
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m_pixBarGradient = QPixmap(height() * COLUMN_WIDTH, height());
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m_pixCompose = QPixmap(size());
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canvas_ = QPixmap(size());
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canvas_.fill(palette().color(QPalette::Background));
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QPainter p(&m_pixBarGradient);
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QColor rgb(palette().color(QPalette::Highlight));
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for (int x = 0, r = rgb.red(), g = rgb.green(), b = rgb.blue(), r2 = 255 - r; x < height();
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++x) {
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for (int y = x; y > 0; --y) {
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const double fraction = static_cast<double>y / height();
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// p.setPen( QColor( r + (int)(r2 * fraction), g, b - (int)(255 *
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// fraction) ) );
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p.setPen(QColor(r + static_cast<int>(r2 * fraction), g, b));
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p.drawLine(x * COLUMN_WIDTH, height() - y, (x + 1) * COLUMN_WIDTH,
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height() - y);
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}
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}
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setMinimumSize(QSize(BAND_COUNT * COLUMN_WIDTH, 10));
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}
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void BarAnalyzer::analyze(QPainter& p, const Scope& s, bool new_frame) {
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if (!new_frame) {
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p.drawPixmap(0, 0, canvas_);
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return;
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}
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// Analyzer::interpolate( s, m_bands );
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Scope& v = m_scope;
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Analyzer::interpolate(s, v);
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QPainter canvas_painter(&canvas_);
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canvas_.fill(palette().color(QPalette::Background));
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for (uint i = 0, x = 0, y2; i < v.size(); ++i, x += COLUMN_WIDTH + 1) {
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// assign pre[log10]'d value
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y2 = static_cast<uint>(v[i] *
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256); // 256 will be optimised to a bitshift //no, it's a float
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y2 = m_lvlMapper[(y2 > 255) ? 255 : y2]; // lvlMapper is array of ints with
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// values 0 to height()
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int change = y2 - barVector[i];
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// using the best of Markey's, piggz and Max's ideas on the way to shift the
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// bars
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// we have the following:
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// 1. don't adjust shift when doing small up movements
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// 2. shift large upwards with a bias towards last value
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// 3. fall downwards at a constant pace
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/*if ( change > MAX_UP ) //anything too much greater than 2 gives "jitter"
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//add some dynamics - makes the value slightly closer to what it was last time
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y2 = ( barVector[i] + MAX_UP );
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//y2 = ( barVector[i] * 2 + y2 ) / 3;
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else*/ if (change <
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MAX_DOWN)
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y2 = barVector[i] + MAX_DOWN;
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if (static_cast<int>y2 > roofVector[i]) {
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roofVector[i] = static_cast<int>y2;
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roofVelocityVector[i] = 1;
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}
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// remember where we are
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barVector[i] = y2;
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if (m_roofMem[i].size() > NUM_ROOFS)
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m_roofMem[i].erase(m_roofMem[i].begin());
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// blt last n roofs, a.k.a motion blur
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for (uint c = 0; c < m_roofMem[i].size(); ++c)
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// bitBlt( m_pComposePixmap, x, m_roofMem[i]->at( c ), m_roofPixmaps[ c ]
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// );
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// bitBlt( canvas(), x, m_roofMem[i][c], &m_pixRoof[ NUM_ROOFS - 1 - c ]
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// );
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canvas_painter.drawPixmap(x, m_roofMem[i][c],
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m_pixRoof[NUM_ROOFS - 1 - c]);
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// blt the bar
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canvas_painter.drawPixmap(x, height() - y2, *gradient(), y2 * COLUMN_WIDTH,
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height() - y2, COLUMN_WIDTH, y2);
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/*bitBlt( canvas(), x, height() - y2,
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gradient(), y2 * COLUMN_WIDTH, height() - y2, COLUMN_WIDTH, y2,
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Qt::CopyROP );*/
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m_roofMem[i].push_back(height() - roofVector[i] - 2);
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// set roof parameters for the NEXT draw
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if (roofVelocityVector[i] != 0) {
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if (roofVelocityVector[i] > 32) // no reason to do == 32
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roofVector[i] -=
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(roofVelocityVector[i] - 32) / 20; // trivial calculation
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if (roofVector[i] < 0) {
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roofVector[i] = 0; // not strictly necessary
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roofVelocityVector[i] = 0;
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} else {
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++roofVelocityVector[i];
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}
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}
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}
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p.drawPixmap(0, 0, canvas_);
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}
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