Add boom and rainbow analyzers

2019-02-04 21:34:12 +01:00
parent ad7084b897
commit 0679b78c1d
17 changed files with 973 additions and 296 deletions
--- a/src/analyzer/rainbowanalyzer.h
+++ b/src/analyzer/rainbowanalyzer.h
@@ -0,0 +1,141 @@
+/*
+   Strawberry Music Player
+   This file was part of Clementine.
+   Copyright 2011, Tyler Rhodes <tyler.s.rhodes@gmail.com>
+   Copyright 2011-2012, 2014, David Sansome <me@davidsansome.com>
+   Copyright 2011, 2014, John Maguire <john.maguire@gmail.com>
+   Copyright 2014, Alibek Omarov <a1ba.omarov@gmail.com>
+   Copyright 2014, Krzysztof Sobiecki <sobkas@gmail.com>
+   Copyright 2014-2015, Mark Furneaux <mark@furneaux.ca>
+   Copyright 2015, Arun Narayanankutty <n.arun.lifescience@gmail.com>
+
+   Strawberry 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.
+
+   Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAINBOWANALYZER_H
+#define RAINBOWANALYZER_H
+
+#include "analyzerbase.h"
+
+#include <QObject>
+#include <QWidget>
+#include <QDateTime>
+#include <QPainter>
+#include <QPen>
+
+namespace Rainbow {
+class RainbowAnalyzer : public Analyzer::Base {
+  Q_OBJECT
+
+ public:
+  enum RainbowType {
+    Nyancat = 0,
+    Dash = 1 
+  };
+
+  RainbowAnalyzer(const RainbowType& rbtype, QWidget* parent);
+
+ protected:
+  void transform(Analyzer::Scope&);
+  void analyze(QPainter& p, const Analyzer::Scope&, bool new_frame);
+
+  void timerEvent(QTimerEvent* e);
+  void resizeEvent(QResizeEvent* e);
+
+ private:
+  static const int kHeight[];
+  static const int kWidth[];
+  static const int kFrameCount[];
+  static const int kRainbowHeight[];
+  static const int kRainbowOverlap[];
+  static const int kSleepingHeight[];
+
+  static const int kHistorySize = 128;
+  static const int kRainbowBands = 6;
+  static const float kPixelScale;
+
+  static const int kFrameIntervalMs = 150;
+
+  static RainbowType rainbowtype;
+
+  inline QRect SourceRect(RainbowType rainbowtype) const {
+    return QRect(0, kHeight[rainbowtype] * frame_, kWidth[rainbowtype], kHeight[rainbowtype]);
+  }
+
+  inline QRect SleepingSourceRect(RainbowType rainbowtype) const {
+    return QRect(0, kHeight[rainbowtype] * kFrameCount[rainbowtype], kWidth[rainbowtype], kSleepingHeight[rainbowtype]);
+  }
+
+  inline QRect DestRect(RainbowType rainbowtype) const {
+    return QRect(width() - kWidth[rainbowtype], (height() - kHeight[rainbowtype]) / 2, kWidth[rainbowtype], kHeight[rainbowtype]);
+  }
+
+  inline QRect SleepingDestRect(RainbowType rainbowtype) const {
+    return QRect(width() - kWidth[rainbowtype], (height() - kSleepingHeight[rainbowtype]) / 2, kWidth[rainbowtype], kSleepingHeight[rainbowtype]);
+  }
+
+ private:
+  // "constants" that get initialised in the constructor
+  float band_scale_[kRainbowBands];
+  QPen colors_[kRainbowBands];
+
+  // Rainbow Nyancat & Dash
+  QPixmap cat_dash_[2];
+
+  // For the cat or dash animation
+  int timer_id_;
+  int frame_;
+
+  // The y positions of each point on the rainbow.
+  float history_[kHistorySize * kRainbowBands];
+
+  // A cache of the last frame's rainbow, 
+  // so it can be used in the next frame.
+  QPixmap buffer_[2];
+  int current_buffer_;
+
+  // Geometry information that's updated on resize:
+  // The width of the widget minus the space for the cat
+  int available_rainbow_width_;
+
+  // X spacing between each point in the polyline.
+  int px_per_frame_;
+
+  // Amount the buffer_ is shifted to the left (off the edge of the widget) 
+  // to make the rainbow extend from 0 to available_rainbow_width_.
+  int x_offset_;
+
+  QBrush background_brush_;
+};
+
+class NyanCatAnalyzer : public RainbowAnalyzer {
+  Q_OBJECT
+
+ public:
+  Q_INVOKABLE NyanCatAnalyzer(QWidget* parent);
+  
+  static const char* kName;
+};
+
+class RainbowDashAnalyzer : public RainbowAnalyzer {
+  Q_OBJECT
+
+ public:
+  Q_INVOKABLE RainbowDashAnalyzer(QWidget* parent);
+
+  static const char* kName;
+};
+}
+
+#endif  // RAINBOWANALYZER_H