iodev/speaker.h

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: speaker.h,v 1.4 2006/04/27 15:11:45 sshwarts Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4
   5 /*
   6 Copyright David N. Welton <davidw@dedasys.com> 2003
   7
   8 This code may be distributed under the same terms as bochs.
   9 */
  10
  11 /* This file defines a class to deal with the speaker.
  12  * This class also tries to play beeps on the console
  13  * (linux only) and also forwards beeps to the gui
  14  * so we have the possiblity to signal the beep
  15  */
  16
  17 #ifndef BX_PC_SPEAKER_H
  18 #define BX_PC_SPEAKER_H
  19
  20 class bx_speaker_c : public bx_speaker_stub_c {
  21 public:
  22     bx_speaker_c();
  23     virtual ~bx_speaker_c();
  24
  25     virtual void init(void);
  26     virtual void reset(unsigned int);
  27
  28     void beep_on(float frequency);
  29     void beep_off();
  30 private:
  31     float beep_frequency;  // 0 : beep is off
  32 #ifdef __linux__
  33     /* Do we have access?  If not, just skip everything else. */
  34     signed int consolefd;
  35     const static unsigned int clock_tick_rate = 1193180;
  36 #elif defined(WIN32)
  37     Bit64u usec_start;
  38 #endif
  39 };
  40
  41 #endif