utils/wxMMedia/sndfrag.h

   1 // /////////////////////////////////////////////////////////////////////////////
   2 // Name:       sndfrag.h
   3 // Purpose:    wxMMedia
   4 // Author:     Guilhem Lavaux
   5 // Created:    1997
   6 // Updated:    1998
   7 // Copyright:  (C) 1997, 1998, Guilhem Lavaux
   8 // License:    wxWindows license
   9 // /////////////////////////////////////////////////////////////////////////////
  10 #ifndef __SND_frag_H__
  11 #define __SND_frag_H__
  12 #ifdef __GNUG__
  13 #pragma interface
  14 #endif
  15
  16 #ifdef WX_PRECOMP
  17 #include "wx_prec.h"
  18 #else
  19 #include "wx/wx.h"
  20 #endif
  21 #include "sndsnd.h"
  22
  23 ///
  24 class wxFragmentBuffer {
  25 protected:
  26   wxSound *m_iodrv;
  27
  28   ///
  29   wxUint8 m_maxoq, m_maxiq;
  30
  31   ///
  32   typedef enum {
  33     wxBUFFER_FREE,
  34     wxBUFFER_FFILLED,
  35     wxBUFFER_TOFREE
  36   } BufState;
  37 public:
  38   ///
  39   typedef struct {
  40     char *data;
  41     ///
  42     char *user_data;
  43     ///
  44     wxUint32 size, ptr;
  45     ///
  46     wxList *buffers;
  47     ///
  48     BufState state;
  49   } wxFragBufPtr;
  50 protected:
  51   ///
  52   wxFragBufPtr *m_optrs, *m_iptrs;
  53   ///
  54   wxFragBufPtr *m_lstoptrs, *m_lstiptrs;
  55   ///
  56   bool m_buf2free, m_dontq, m_freeing;
  57 public:
  58   ///
  59   wxFragmentBuffer(wxSound& io_drv);
  60   ///
  61   virtual ~wxFragmentBuffer();
  62
  63   ///
  64   virtual void AllocIOBuffer() = 0;
  65   ///
  66   virtual void FreeIOBuffer() = 0;
  67
  68   ///
  69   void AbortBuffer(wxSndBuffer *buf);
  70
  71   ///
  72   wxFragBufPtr *FindFreeBuffer(wxFragBufPtr *list, wxUint8 max_queue);
  73   ///
  74   bool NotifyOutputBuffer(wxSndBuffer *buf);
  75   ///
  76   bool NotifyInputBuffer(wxSndBuffer *buf);
  77
  78   ///
  79   void OnBufferFinished(wxFragBufPtr *ptr);
  80
  81   ///
  82   virtual bool OnBufferFilled(wxFragBufPtr *ptr, wxSndMode mode) = 0;
  83
  84   ///
  85   inline wxSndBuffer *LastBuffer() {
  86     wxNode *node = m_iodrv->m_buffers.Last();
  87
  88     if (!node) return NULL;
  89     return (wxSndBuffer *)node->Data();
  90   }
  91   ///
  92   inline wxSndBuffer *FirstBuffer() {
  93     wxNode *node = m_iodrv->m_buffers.First();
  94
  95     if (!node) return NULL;
  96     return (wxSndBuffer *)node->Data();
  97   }
  98 protected:
  99   void FreeBufToFree(bool force = FALSE);
 100   void ClearBuffer(wxFragBufPtr *ptr);
 101 };
 102
 103 #endif