Rename analyzers and add turbine analyzer

src/analyzer/turbineanalyzer.cpp

@@ -0,0 +1,100 @@
+/*
+   Strawberry Music Player
+   This file was part of Clementine.
+   Copyright 2003, Stanislav Karchebny <berkus@users.sf.net>
+   Copyright 2003, Max Howell <max.howell@methylblue.com>
+   Copyright 2009-2010, David Sansome <davidsansome@gmail.com>
+   Copyright 2014-2015, Mark Furneaux <mark@furneaux.ca>
+   Copyright 2014, Krzysztof Sobiecki <sobkas@gmail.com>
+   Copyright 2014, John Maguire <john.maguire@gmail.com>
+
+   Clementine 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 3 of the License, or
+   (at your option) any later version.
+
+   Clementine 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 Clementine.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include <cmath>
+#include <algorithm>
+
+#include <QPainter>
+
+#include "turbineanalyzer.h"
+#include "engine/enginebase.h"
+
+const char *TurbineAnalyzer::kName = QT_TRANSLATE_NOOP("AnalyzerContainer", "Turbine");
+
+TurbineAnalyzer::TurbineAnalyzer(QWidget *parent) : BoomAnalyzer(parent) {}
+
+void TurbineAnalyzer::analyze(QPainter &p, const Scope &scope, const bool new_frame) {
+
+  if (!new_frame || engine_->state() == EngineBase::State::Paused) {
+    p.drawPixmap(0, 0, canvas_);
+    return;
+  }
+
+  const uint hd2 = height() / 2;
+  const uint kMaxHeight = hd2 - 1;
+
+  QPainter canvas_painter(&canvas_);
+  canvas_.fill(palette().color(QPalette::Window));
+
+  AnalyzerBase::interpolate(scope, scope_);
+
+  for (uint i = 0, x = 0, y = 0; i < static_cast<uint>(bands_); ++i, x += kColumnWidth + 1) {
+    float h = static_cast<float>(std::min(log10(scope_[i] * 256.0) * F_ * 0.5, kMaxHeight * 1.0));
+
+    if (h > bar_height_[i]) {
+      bar_height_[i] = h;
+      if (h > peak_height_[i]) {
+        peak_height_[i] = h;
+        peak_speed_[i] = 0.01;
+      }
+      else {
+        goto peak_handling;
+      }
+    }
+    else {
+      if (bar_height_[i] > 0.0) {
+        bar_height_[i] -= K_barHeight_;  // 1.4
+        if (bar_height_[i] < 0.0) bar_height_[i] = 0.0;
+      }
+
+    peak_handling:
+      if (peak_height_[i] > 0.0) {
+        peak_height_[i] -= peak_speed_[i];
+        peak_speed_[i] *= F_peakSpeed_;  // 1.12
+        peak_height_[i] = std::max(0.0, std::max(bar_height_[i], peak_height_[i]));
+      }
+    }
+
+    y = hd2 - static_cast<uint>(bar_height_[i]);
+    canvas_painter.drawPixmap(static_cast<int>(x + 1), static_cast<int>(y), barPixmap_, 0, static_cast<int>(y), -1, -1);
+    canvas_painter.drawPixmap(static_cast<int>(x + 1), static_cast<int>(hd2), barPixmap_, 0, static_cast<int>(bar_height_[i]), -1, -1);
+
+    canvas_painter.setPen(fg_);
+    if (bar_height_[i] > 0) {
+      canvas_painter.drawRect(static_cast<int>(x), static_cast<int>(y), kColumnWidth - 1, static_cast<int>(bar_height_[i]) * 2 - 1);
+    }
+
+    const uint x2 = x + kColumnWidth - 1;
+    canvas_painter.setPen(palette().color(QPalette::Midlight));
+    y = hd2 - static_cast<uint>(peak_height_[i]);
+    canvas_painter.drawLine(static_cast<int>(x), static_cast<int>(y), static_cast<int>(x2), static_cast<int>(y));
+    y = hd2 + static_cast<uint>(peak_height_[i]);
+    canvas_painter.drawLine(static_cast<int>(x), static_cast<int>(y), static_cast<int>(x2), static_cast<int>(y));
+  }
+
+  p.drawPixmap(0, 0, canvas_);
+
+}