Bochs/bochs/iodev/speaker.h

78 lines
2.3 KiB
C++

/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2003 David N. Welton <davidw@dedasys.com>.
// Copyright (C) 2003-2020 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;
Bit16s beep_level;
Bit8u beep_volume;
#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