421 lines
12 KiB
C++
421 lines
12 KiB
C++
/* This file is part of Clementine.
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Copyright 2003-2005, Max Howell <max.howell@methylblue.com>
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Copyright 2005, Mark Kretschmann <markey@web.de>
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Copyright 2009-2010, David Sansome <davidsansome@gmail.com>
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Copyright 2010, 2014, John Maguire <john.maguire@gmail.com>
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Copyright 2014-2015, Mark Furneaux <mark@furneaux.ca>
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Copyright 2014, Krzysztof Sobiecki <sobkas@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: Max Howell <max.howell@methylblue.com> 2003-2005
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* Original Author: Mark Kretschmann <markey@web.de> 2005
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*/
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#include "blockanalyzer.h"
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#include <cmath>
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#include <QMouseEvent>
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#include <QResizeEvent>
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#include <cstdlib>
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#include <QPainter>
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const uint BlockAnalyzer::kHeight = 2;
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const uint BlockAnalyzer::kWidth = 4;
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const uint BlockAnalyzer::kMinRows = 3; // arbituary
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const uint BlockAnalyzer::kMinColumns = 32; // arbituary
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const uint BlockAnalyzer::kMaxColumns = 256; // must be 2**n
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const uint BlockAnalyzer::kFadeSize = 90;
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const char* BlockAnalyzer::kName =
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QT_TRANSLATE_NOOP("AnalyzerContainer", "Block analyzer");
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BlockAnalyzer::BlockAnalyzer(QWidget* parent)
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: Analyzer::Base(parent, 9),
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columns_(0),
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rows_(0),
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y_(0),
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barPixmap_(1, 1),
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topBarPixmap_(kWidth, kHeight),
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scope_(kMinColumns),
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store_(1 << 8, 0),
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fade_bars_(kFadeSize),
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fade_pos_(1 << 8, 50),
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fade_intensity_(1 << 8, 32) {
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setMinimumSize(kMinColumns * (kWidth + 1) - 1, kMinRows * (kHeight + 1) - 1);
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// -1 is padding, no drawing takes place there
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setMaximumWidth(kMaxColumns * (kWidth + 1) - 1);
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// mxcl says null pixmaps cause crashes, so let's play it safe
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for (uint i = 0; i < kFadeSize; ++i) fade_bars_[i] = QPixmap(1, 1);
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}
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BlockAnalyzer::~BlockAnalyzer() {}
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void BlockAnalyzer::resizeEvent(QResizeEvent* e) {
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QWidget::resizeEvent(e);
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background_ = QPixmap(size());
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canvas_ = QPixmap(size());
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const uint oldRows = rows_;
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// all is explained in analyze()..
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// +1 to counter -1 in maxSizes, trust me we need this!
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columns_ = qMin(
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static_cast<uint>(static_cast<double>(width() + 1) / (kWidth + 1)) + 1,
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kMaxColumns);
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rows_ = static_cast<uint>(static_cast<double>(height() + 1) / (kHeight + 1));
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// this is the y-offset for drawing from the top of the widget
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y_ = (height() - (rows_ * (kHeight + 1)) + 2) / 2;
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scope_.resize(columns_);
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if (rows_ != oldRows) {
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barPixmap_ = QPixmap(kWidth, rows_ * (kHeight + 1));
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for (uint i = 0; i < kFadeSize; ++i)
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fade_bars_[i] = QPixmap(kWidth, rows_ * (kHeight + 1));
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yscale_.resize(rows_ + 1);
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const uint PRE = 1,
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PRO = 1; // PRE and PRO allow us to restrict the range somewhat
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for (uint z = 0; z < rows_; ++z)
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yscale_[z] = 1 - (log10(PRE + z) / log10(PRE + rows_ + PRO));
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yscale_[rows_] = 0;
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determineStep();
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paletteChange(palette());
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}
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updateBandSize(columns_);
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drawBackground();
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}
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void BlockAnalyzer::determineStep() {
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// falltime is dependent on rowcount due to our digital resolution (ie we have
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// boxes/blocks of pixels)
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// I calculated the value 30 based on some trial and error
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// the fall time of 30 is too slow on framerates above 50fps
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const double fallTime = timeout() < 20 ? 20 * rows_ : 30 * rows_;
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step_ = static_cast<double>(rows_ * timeout()) / fallTime;
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}
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void BlockAnalyzer::framerateChanged() { // virtual
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determineStep();
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}
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void BlockAnalyzer::transform(Analyzer::Scope& s) {
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for (uint x = 0; x < s.size(); ++x) s[x] *= 2;
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fht_->spectrum(s.data());
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fht_->scale(s.data(), 1.0 / 20);
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// the second half is pretty dull, so only show it if the user has a large
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// analyzer
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// by setting to scope_.size() if large we prevent interpolation of large
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// analyzers, this is good!
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s.resize(scope_.size() <= kMaxColumns / 2 ? kMaxColumns / 2 : scope_.size());
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}
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void BlockAnalyzer::analyze(QPainter& p, const Analyzer::Scope& s,
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bool new_frame) {
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// y = 2 3 2 1 0 2
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// . . . . # .
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// . . . # # .
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// # . # # # #
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// # # # # # #
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//
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// visual aid for how this analyzer works.
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// y represents the number of blanks
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// y starts from the top and increases in units of blocks
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// yscale_ looks similar to: { 0.7, 0.5, 0.25, 0.15, 0.1, 0 }
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// if it contains 6 elements there are 5 rows in the analyzer
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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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QPainter canvas_painter(&canvas_);
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Analyzer::interpolate(s, scope_);
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// update the graphics with the new colour
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if (psychedelic_enabled_) {
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paletteChange(QPalette());
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}
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// Paint the background
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canvas_painter.drawPixmap(0, 0, background_);
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for (uint y, x = 0; x < scope_.size(); ++x) {
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// determine y
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for (y = 0; scope_[x] < yscale_[y]; ++y) continue;
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// this is opposite to what you'd think, higher than y
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// means the bar is lower than y (physically)
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if (static_cast<float>(y) > store_[x])
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y = static_cast<int>(store_[x] += step_);
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else
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store_[x] = y;
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// if y is lower than fade_pos_, then the bar has exceeded the kHeight of
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// the fadeout
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// if the fadeout is quite faded now, then display the new one
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if (y <= fade_pos_[x] /*|| fade_intensity_[x] < kFadeSize / 3*/) {
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fade_pos_[x] = y;
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fade_intensity_[x] = kFadeSize;
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}
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if (fade_intensity_[x] > 0) {
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const uint offset = --fade_intensity_[x];
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const uint y = y_ + (fade_pos_[x] * (kHeight + 1));
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canvas_painter.drawPixmap(x * (kWidth + 1), y, fade_bars_[offset], 0, 0,
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kWidth, height() - y);
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}
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if (fade_intensity_[x] == 0) fade_pos_[x] = rows_;
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// REMEMBER: y is a number from 0 to rows_, 0 means all blocks are glowing,
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// rows_ means none are
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canvas_painter.drawPixmap(x * (kWidth + 1), y * (kHeight + 1) + y_, *bar(),
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0, y * (kHeight + 1), bar()->width(),
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bar()->height());
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}
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for (uint x = 0; x < store_.size(); ++x)
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canvas_painter.drawPixmap(x * (kWidth + 1),
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static_cast<int>(store_[x]) * (kHeight + 1) + y_,
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topBarPixmap_);
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p.drawPixmap(0, 0, canvas_);
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}
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static inline void adjustToLimits(int& b, int& f, uint& amount) {
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// with a range of 0-255 and maximum adjustment of amount,
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// maximise the difference between f and b
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if (b < f) {
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if (b > 255 - f) {
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amount -= f;
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f = 0;
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} else {
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amount -= (255 - f);
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f = 255;
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}
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} else {
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if (f > 255 - b) {
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amount -= f;
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f = 0;
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} else {
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amount -= (255 - f);
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f = 255;
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}
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}
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}
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void BlockAnalyzer::psychedelicModeChanged(bool enabled) {
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psychedelic_enabled_ = enabled;
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// reset colours back to normal
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paletteChange(QPalette());
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}
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/**
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* Clever contrast function
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*
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* It will try to adjust the foreground color such that it contrasts well with
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*the background
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* It won't modify the hue of fg unless absolutely necessary
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* @return the adjusted form of fg
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*/
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QColor ensureContrast(const QColor& bg, const QColor& fg, uint _amount = 150) {
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class OutputOnExit {
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public:
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explicit OutputOnExit(const QColor& color) : c(color) {}
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~OutputOnExit() {
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int h, s, v;
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c.getHsv(&h, &s, &v);
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}
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private:
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const QColor& c;
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};
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OutputOnExit allocateOnTheStack(fg);
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int bh, bs, bv;
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int fh, fs, fv;
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bg.getHsv(&bh, &bs, &bv);
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fg.getHsv(&fh, &fs, &fv);
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int dv = abs(bv - fv);
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// value is the best measure of contrast
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// if there is enough difference in value already, return fg unchanged
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if (dv > static_cast<int>(_amount)) return fg;
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int ds = abs(bs - fs);
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// saturation is good enough too. But not as good. TODO adapt this a little
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if (ds > static_cast<int>(_amount)) return fg;
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int dh = abs(bh - fh);
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if (dh > 120) {
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// a third of the colour wheel automatically guarantees contrast
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// but only if the values are high enough and saturations significant enough
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// to allow the colours to be visible and not be shades of grey or black
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// check the saturation for the two colours is sufficient that hue alone can
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// provide sufficient contrast
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if (ds > static_cast<int>(_amount) / 2 && (bs > 125 && fs > 125))
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return fg;
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else if (dv > static_cast<int>(_amount) / 2 && (bv > 125 && fv > 125))
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return fg;
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}
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if (fs < 50 && ds < 40) {
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// low saturation on a low saturation is sad
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const int tmp = 50 - fs;
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fs = 50;
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if (static_cast<int>(_amount) > tmp)
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_amount -= tmp;
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else
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_amount = 0;
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}
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// test that there is available value to honor our contrast requirement
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if (255 - dv < static_cast<int>(_amount)) {
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// we have to modify the value and saturation of fg
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// adjustToLimits( bv, fv, amount );
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// see if we need to adjust the saturation
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if (static_cast<int>(_amount) > 0) adjustToLimits(bs, fs, _amount);
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// see if we need to adjust the hue
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if (static_cast<int>(_amount) > 0)
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fh += static_cast<int>(_amount); // cycles around;
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return QColor::fromHsv(fh, fs, fv);
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}
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if (fv > bv && bv > static_cast<int>(_amount))
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return QColor::fromHsv(fh, fs, bv - static_cast<int>(_amount));
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if (fv < bv && fv > static_cast<int>(_amount))
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return QColor::fromHsv(fh, fs, fv - static_cast<int>(_amount));
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if (fv > bv && (255 - fv > static_cast<int>(_amount)))
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return QColor::fromHsv(fh, fs, fv + static_cast<int>(_amount));
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if (fv < bv && (255 - bv > static_cast<int>(_amount)))
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return QColor::fromHsv(fh, fs, bv + static_cast<int>(_amount));
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return Qt::blue;
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}
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void BlockAnalyzer::paletteChange(const QPalette&) {
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const QColor bg = palette().color(QPalette::Background);
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QColor fg;
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if (psychedelic_enabled_) {
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fg = getPsychedelicColor(scope_, 10, 75);
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} else {
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fg = ensureContrast(bg, palette().color(QPalette::Highlight));
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}
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topBarPixmap_.fill(fg);
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const double dr =
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15 * static_cast<double>(bg.red() - fg.red()) / (rows_ * 16);
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const double dg =
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15 * static_cast<double>(bg.green() - fg.green()) / (rows_ * 16);
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const double db =
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15 * static_cast<double>(bg.blue() - fg.blue()) / (rows_ * 16);
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const int r = fg.red(), g = fg.green(), b = fg.blue();
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bar()->fill(bg);
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QPainter p(bar());
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for (int y = 0; static_cast<uint>(y) < rows_; ++y)
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// graduate the fg color
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p.fillRect(
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0, y * (kHeight + 1), kWidth, kHeight,
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QColor(r + static_cast<int>(dr * y), g + static_cast<int>(dg * y),
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b + static_cast<int>(db * y)));
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{
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const QColor bg = palette().color(QPalette::Background).dark(112);
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// make a complimentary fadebar colour
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// TODO(John Maguire): dark is not always correct, dumbo!
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int h, s, v;
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palette().color(QPalette::Background).dark(150).getHsv(&h, &s, &v);
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const QColor fg(QColor::fromHsv(h + 120, s, v));
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const double dr = fg.red() - bg.red();
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const double dg = fg.green() - bg.green();
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const double db = fg.blue() - bg.blue();
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const int r = bg.red(), g = bg.green(), b = bg.blue();
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// Precalculate all fade-bar pixmaps
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for (uint y = 0; y < kFadeSize; ++y) {
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fade_bars_[y].fill(palette().color(QPalette::Background));
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QPainter f(&fade_bars_[y]);
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for (int z = 0; static_cast<uint>(z) < rows_; ++z) {
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const double Y = 1.0 - (log10(kFadeSize - y) / log10(kFadeSize));
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f.fillRect(
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0, z * (kHeight + 1), kWidth, kHeight,
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QColor(r + static_cast<int>(dr * Y), g + static_cast<int>(dg * Y),
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b + static_cast<int>(db * Y)));
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}
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}
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}
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drawBackground();
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}
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void BlockAnalyzer::drawBackground() {
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if (background_.isNull()) {
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return;
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}
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const QColor bg = palette().color(QPalette::Background);
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const QColor bgdark = bg.dark(112);
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background_.fill(bg);
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QPainter p(&background_);
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if (p.paintEngine() == 0) {
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return;
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}
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for (int x = 0; (uint)x < columns_; ++x)
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for (int y = 0; (uint)y < rows_; ++y)
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p.fillRect(x * (kWidth + 1), y * (kHeight + 1) + y_, kWidth, kHeight,
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bgdark);
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}
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