Add moodbar

src/moodbar/moodbarbuilder.h

@@ -0,0 +1,50 @@
+/* This file was part of Clementine.
+   Copyright 2014, David Sansome <me@davidsansome.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 MOODBARBUILDER_H
+#define MOODBARBUILDER_H
+
+#include <QList>
+#include <QByteArray>
+
+class MoodbarBuilder {
+ public:
+  MoodbarBuilder();
+
+  void Init(int bands, int rate_hz);
+  void AddFrame(const double* magnitudes, int size);
+  QByteArray Finish(int width);
+
+ private:
+  struct Rgb {
+    Rgb() : r(0), g(0), b(0) {}
+    Rgb(double r_, double g_, double b_) : r(r_), g(g_), b(b_) {}
+
+    double r, g, b;
+  };
+
+  int BandFrequency(int band) const;
+  static void Normalize(QList<Rgb>* vals, double Rgb::*member);
+
+  QList<uint> barkband_table_;
+  int bands_;
+  int rate_hz_;
+
+  QList<Rgb> frames_;
+};
+
+#endif  // MOODBARBUILDER_H