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Bochs/bochs/iodev/speaker.cc

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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// 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
#define BX_PLUGGABLE
#include "iodev.h"
#include "speaker.h"
#if BX_SUPPORT_SOUNDLOW
#include "sound/soundlow.h"
#include "sound/soundmod.h"
#endif
#ifdef __linux__
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/kd.h>
#endif
#define LOG_THIS theSpeaker->
bx_speaker_c *theSpeaker= NULL;
#if defined(__linux__) || defined(WIN32)
#define BX_SYSTEM_SPEAKER
#endif
enum {
BX_SPK_MODE_NONE,
#if BX_SUPPORT_SOUNDLOW
BX_SPK_MODE_SOUND,
#endif
#ifdef BX_SYSTEM_SPEAKER
BX_SPK_MODE_SYSTEM,
#endif
BX_SPK_MODE_GUI
};
static const char *speaker_mode_list[] = {
"none",
#if BX_SUPPORT_SOUNDLOW
"sound",
#endif
#ifdef BX_SYSTEM_SPEAKER
"system",
#endif
"gui",
NULL
};
#if BX_SUPPORT_SOUNDLOW
BX_MUTEX(beep_mutex);
Bit32u beep_callback(void *dev, Bit16u rate, Bit8u *buffer, Bit32u len);
#endif
// builtin configuration handling functions
void speaker_init_options(void)
{
bx_list_c *sound = (bx_list_c*)SIM->get_param("sound");
bx_list_c *menu = new bx_list_c(sound, "speaker", "PC speaker output configuration");
menu->set_options(menu->SERIES_ASK);
bx_param_bool_c *enabled = new bx_param_bool_c(menu, "enabled", "Enable speaker output",
"Enables the PC speaker output", 1);
bx_param_enum_c *mode = new bx_param_enum_c(menu, "mode", "Speaker output mode",
"The mode can be one these: 'none', 'sound', 'system' or 'gui'",
speaker_mode_list, 1, BX_SPK_MODE_NONE);
mode->set_ask_format("Select speker output mode [%s] ");
bx_list_c *deplist = new bx_list_c(NULL);
deplist->add(mode);
enabled->set_dependent_list(deplist);
}
Bit32s speaker_options_parser(const char *context, int num_params, char *params[])
{
if (!strcmp(params[0], "speaker")) {
bx_list_c *base = (bx_list_c*) SIM->get_param(BXPN_SOUND_SPEAKER);
for (int i=1; i<num_params; i++) {
if (SIM->parse_param_from_list(context, params[i], base) < 0) {
BX_ERROR(("%s: unknown parameter for speaker ignored.", context));
}
}
} else {
BX_PANIC(("%s: unknown directive '%s'", context, params[0]));
}
return 0;
}
Bit32s speaker_options_save(FILE *fp)
{
return SIM->write_param_list(fp, (bx_list_c*) SIM->get_param(BXPN_SOUND_SPEAKER), NULL, 0);
}
// device plugin entry points
int CDECL libspeaker_LTX_plugin_init(plugin_t *plugin, plugintype_t type)
{
theSpeaker = new bx_speaker_c();
bx_devices.pluginSpeaker = theSpeaker;
BX_REGISTER_DEVICE_DEVMODEL(plugin, type, theSpeaker, BX_PLUGIN_SPEAKER);
// add new configuration parameters for the config interface
speaker_init_options();
// register add-on options for bochsrc and command line
SIM->register_addon_option("speaker", speaker_options_parser, speaker_options_save);
return(0); // Success
}
void CDECL libspeaker_LTX_plugin_fini(void)
{
bx_devices.pluginSpeaker = &bx_devices.stubSpeaker;
delete theSpeaker;
SIM->unregister_addon_option("speaker");
((bx_list_c*)SIM->get_param("sound"))->remove("speaker");
}
// the device object
bx_speaker_c::bx_speaker_c()
{
put("speaker", "PCSPK");
beep_frequency = 0.0; // Off
#ifdef __linux__
consolefd = -1;
#endif
#if BX_SUPPORT_SOUNDLOW
waveout = NULL;
#endif
}
bx_speaker_c::~bx_speaker_c()
{
beep_off();
switch (output_mode) {
#if BX_SUPPORT_SOUNDLOW
case BX_SPK_MODE_SOUND:
beep_active = 0;
if (waveout != NULL) {
if (beep_callback_id >= 0) {
waveout->unregister_wave_callback(beep_callback_id);
}
}
break;
#endif
#ifdef __linux__
case BX_SPK_MODE_SYSTEM:
if (consolefd >= 0) {
close(consolefd);
}
break;
#endif
}
BX_DEBUG(("Exit"));
}
void bx_speaker_c::init(void)
{
// Read in values from config interface
bx_list_c *base = (bx_list_c*) SIM->get_param(BXPN_SOUND_SPEAKER);
// Check if the device is disabled or not configured
if (!SIM->get_param_bool("enabled", base)->get()) {
BX_INFO(("PC speaker output disabled"));
// mark unused plugin for removal
((bx_param_bool_c*)((bx_list_c*)SIM->get_param(BXPN_PLUGIN_CTRL))->get_by_name("speaker"))->set(0);
return;
}
output_mode = SIM->get_param_enum("mode", base)->get();
switch (output_mode) {
#if BX_SUPPORT_SOUNDLOW
case BX_SPK_MODE_SOUND:
waveout = DEV_sound_get_waveout(0);
if (waveout != NULL) {
beep_active = 0;
#if BX_HAVE_REALTIME_USEC
dsp_active = 0;
dsp_start_usec = bx_get_realtime64_usec();
dsp_cb_usec = 0;
dsp_count = 0;
#endif
BX_INIT_MUTEX(beep_mutex);
beep_callback_id = waveout->register_wave_callback(theSpeaker, beep_callback);
BX_INFO(("Using lowlevel sound support for output"));
} else {
BX_ERROR(("Failed to use lowlevel sound support for output"));
output_mode = BX_SPK_MODE_NONE;
}
break;
#endif
#ifdef BX_SYSTEM_SPEAKER
case BX_SPK_MODE_SYSTEM:
#ifdef __linux__
consolefd = open("/dev/console", O_WRONLY);
if (consolefd != -1) {
BX_INFO(("Using /dev/console for output"));
} else {
BX_ERROR(("Failed to open /dev/console: %s", strerror(errno)));
BX_ERROR(("Deactivating beep on console"));
output_mode = BX_SPK_MODE_NONE;
}
#elif defined(WIN32)
BX_INFO(("Using system beep for output"));
#endif
break;
#endif
case BX_SPK_MODE_GUI:
BX_INFO(("Forwarding beep to gui"));
break;
}
}
void bx_speaker_c::reset(unsigned type)
{
beep_off();
}
#if BX_SUPPORT_SOUNDLOW
Bit32u bx_speaker_c::beep_generator(Bit16u rate, Bit8u *buffer, Bit32u len)
{
Bit32u j = 0, ret = 0;
Bit16u beep_samples;
static Bit8u beep_level = 0x40;
static Bit16u beep_pos = 0;
BX_LOCK(beep_mutex);
if (!beep_active) {
beep_samples = 0;
} else {
beep_samples = (Bit32u)((float)rate / beep_frequency / 2);
}
if (beep_samples == 0) {
#if BX_SUPPORT_SOUNDLOW && BX_HAVE_REALTIME_USEC
if (dsp_active) {
ret = dsp_generator(rate, buffer, len);
}
#endif
BX_UNLOCK(beep_mutex);
return ret;
}
do {
buffer[j++] = 0;
buffer[j++] = beep_level;
buffer[j++] = 0;
buffer[j++] = beep_level;
if ((++beep_pos % beep_samples) == 0) {
beep_level ^= 0x80;
beep_pos = 0;
beep_samples = (Bit32u)((float)rate / beep_frequency / 2);
if (beep_samples == 0) break;
}
} while (j < len);
BX_UNLOCK(beep_mutex);
return len;
}
#if BX_SUPPORT_SOUNDLOW && BX_HAVE_REALTIME_USEC
Bit32u bx_speaker_c::dsp_generator(Bit16u rate, Bit8u *buffer, Bit32u len)
{
Bit32u i = 0, j = 0;
double tmp_dsp_usec, step_usec;
static Bit8u dsp_level = 0x40;
Bit64u new_dsp_cb_usec = bx_get_realtime64_usec() - dsp_start_usec;
if (dsp_cb_usec == 0) {
dsp_cb_usec = new_dsp_cb_usec - 25000;
}
tmp_dsp_usec = (double)dsp_cb_usec;
step_usec = 1000000.0 / (double)rate;
do {
if ((i < dsp_count) && (dsp_event_buffer[i] < (Bit64u)tmp_dsp_usec)) {
dsp_level ^= 0x80;
i++;
}
buffer[j++] = 0;
buffer[j++] = dsp_level;
buffer[j++] = 0;
buffer[j++] = dsp_level;
tmp_dsp_usec += step_usec;
} while (j < len);
dsp_active = 0;
dsp_count = 0;
dsp_cb_usec = new_dsp_cb_usec;
return len;
}
#endif
Bit32u beep_callback(void *dev, Bit16u rate, Bit8u *buffer, Bit32u len)
{
return ((bx_speaker_c*)dev)->beep_generator(rate, buffer, len);
}
#endif
void bx_speaker_c::beep_on(float frequency)
{
#if defined(WIN32)
if ((output_mode == BX_SPK_MODE_SYSTEM) && (beep_frequency != 0.0)) {
beep_off();
}
#endif
switch (output_mode) {
#if BX_SUPPORT_SOUNDLOW
case BX_SPK_MODE_SOUND:
if ((waveout != NULL) && (frequency != beep_frequency)) {
BX_LOCK(beep_mutex);
beep_frequency = frequency;
beep_active = 1;
BX_UNLOCK(beep_mutex);
}
break;
#endif
#ifdef BX_SYSTEM_SPEAKER
case BX_SPK_MODE_SYSTEM:
#ifdef __linux__
if (consolefd != -1) {
BX_DEBUG(("PC speaker on with frequency %f", frequency));
ioctl(consolefd, KIOCSOUND, (int)(clock_tick_rate/frequency));
}
#elif defined(WIN32)
usec_start = bx_pc_system.time_usec();
#endif
break;
#endif
case BX_SPK_MODE_GUI:
// give the gui a chance to signal beep on
bx_gui->beep_on(frequency);
break;
}
beep_frequency = frequency;
}
#if defined(WIN32)
static struct {
DWORD frequency;
DWORD msec;
} beep_info;
DWORD WINAPI BeepThread(LPVOID)
{
static BOOL threadActive = FALSE;
while (threadActive) Sleep(10);
threadActive = TRUE;
Beep(beep_info.frequency, beep_info.msec);
threadActive = FALSE;
return 0;
}
#endif
void bx_speaker_c::beep_off()
{
switch (output_mode) {
#if BX_SUPPORT_SOUNDLOW
case BX_SPK_MODE_SOUND:
if (waveout != NULL) {
BX_LOCK(beep_mutex);
beep_active = 0;
beep_frequency = 0.0;
BX_UNLOCK(beep_mutex);
}
break;
#endif
#ifdef BX_SYSTEM_SPEAKER
case BX_SPK_MODE_SYSTEM:
if (beep_frequency != 0.0) {
#ifdef __linux__
if (consolefd != -1) {
ioctl(consolefd, KIOCSOUND, 0);
}
#elif defined(WIN32)
// FIXME: sound should start at beep_on() and end here
DWORD threadID;
beep_info.msec = (DWORD)((bx_pc_system.time_usec() - usec_start) / 1000);
beep_info.frequency = (DWORD)beep_frequency;
CloseHandle(CreateThread(NULL, 0, BeepThread, NULL, 0, &threadID));
#endif
}
break;
#endif
case BX_SPK_MODE_GUI:
// give the gui a chance to signal beep off
bx_gui->beep_off();
break;
}
beep_frequency = 0.0;
}
void bx_speaker_c::set_line(bx_bool level)
{
#if BX_SUPPORT_SOUNDLOW && BX_HAVE_REALTIME_USEC
if (output_mode == BX_SPK_MODE_SOUND) {
BX_LOCK(beep_mutex);
Bit64u timestamp = bx_get_realtime64_usec() - dsp_start_usec;
dsp_active = 1;
if (dsp_count < 500) {
dsp_event_buffer[dsp_count++] = timestamp;
} else {
BX_ERROR(("DSP event buffer full"));
}
BX_UNLOCK(beep_mutex);
}
#else
BX_DEBUG(("setting speaker line to %d", level));
#endif
}
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