c10e8feea6
the square wave generator disabled. This feature has been used by old demos and games to play digitized sound before soundcards with DSP became popular.
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/////////////////////////////////////////////////////////////////////////
|
|
// $Id$
|
|
/////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (C) 2003 David N. Welton <davidw@dedasys.com>.
|
|
// Copyright (C) 2003-2018 The Bochs Project
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2 of the License, or (at your option) any later version.
|
|
//
|
|
// This library 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
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
/*
|
|
* This file defines a class to deal with the speaker.
|
|
* This class also tries to play beeps on the console
|
|
* (linux only) and also forwards beeps to the gui
|
|
* so we have the possiblity to signal the beep
|
|
*/
|
|
|
|
#ifndef BX_PC_SPEAKER_H
|
|
#define BX_PC_SPEAKER_H
|
|
|
|
class bx_soundlow_waveout_c;
|
|
|
|
class bx_speaker_c : public bx_speaker_stub_c {
|
|
public:
|
|
bx_speaker_c();
|
|
virtual ~bx_speaker_c();
|
|
|
|
virtual void init(void);
|
|
virtual void reset(unsigned int);
|
|
|
|
void beep_on(float frequency);
|
|
void beep_off();
|
|
void set_line(bx_bool level);
|
|
#if BX_SUPPORT_SOUNDLOW
|
|
Bit32u beep_generator(Bit16u rate, Bit8u *buffer, Bit32u len);
|
|
#if BX_HAVE_REALTIME_USEC
|
|
Bit32u dsp_generator(Bit16u rate, Bit8u *buffer, Bit32u len);
|
|
#endif
|
|
#endif
|
|
private:
|
|
float beep_frequency; // 0 : beep is off
|
|
unsigned output_mode;
|
|
#ifdef __linux__
|
|
/* Do we have access? If not, just skip everything else. */
|
|
signed int consolefd;
|
|
const static unsigned int clock_tick_rate = 1193180;
|
|
#elif defined(WIN32)
|
|
Bit64u usec_start;
|
|
#endif
|
|
#if BX_SUPPORT_SOUNDLOW
|
|
bx_soundlow_waveout_c *waveout;
|
|
int beep_callback_id;
|
|
bx_bool beep_active;
|
|
#if BX_HAVE_REALTIME_USEC
|
|
bx_bool dsp_active;
|
|
Bit64u dsp_start_usec;
|
|
Bit64u dsp_cb_usec;
|
|
Bit32u dsp_count;
|
|
Bit64u dsp_event_buffer[500];
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
#endif
|