src/apps/soundrecorder/VUView.h

   1 /*
   2  * Copyright 2005, Jérôme Duval. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Inspired by SoundCapture from Be newsletter (Media Kit Basics:
   6  *      Consumers and Producers)
   7  */
   8
   9 #ifndef VUVIEW_H
  10 #define VUVIEW_H
  11
  12 #include <Bitmap.h>
  13 #include <View.h>
  14
  15
  16 class VUView : public BView
  17 {
  18 public:
  19         VUView(BRect rect, uint32 resizeFlags);
  20         ~VUView();
  21         void AttachedToWindow();
  22         void DetachedFromWindow();
  23         void Draw(BRect updateRect);
  24         void ComputeLevels(const void* data, size_t size, uint32 format);
  25
  26 private:
  27         void _Run();
  28         void _Quit();
  29         static int32 _RenderLaunch(void *data);
  30         void _RenderLoop();
  31         template<typename T> T _ComputeNextLevel(const void *data,
  32                 size_t size, uint32 format, int32 channel);
  33
  34         thread_id fThreadId;
  35         BBitmap *fBitmap;
  36         BView *fBitmapView;
  37         bool fQuitting;
  38         int32 fLevelCount;
  39         int32 *fCurrentLevels;
  40         int32 fChannels;
  41 };
  42
  43 #endif  /* VUVIEW_H */