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Bochs/bochs/iodev/sound/soundlnx.cc
Volker Ruppert 51688143aa Some work on the lowlevel sound support 
- ALSA driver is now default on Linux (if present)
- SDL sound driver is now default if no platform-specific driver is available
  and the SDL gui is enabled
- soundlnx.cc: sendwavepacket() now exits with error if device is not opened
- soundmod.cc: exit beep loop if sendwavepacket() returns error
2013-08-04 14:35:06 +00:00

387 lines
9.3 KiB
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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001-2013 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
/////////////////////////////////////////////////////////////////////////
// Josef Drexler coded the original version of the lowlevel sound support
// for Linux using OSS. The current version also supports OSS on FreeBSD.
#include "iodev.h"
#include "soundmod.h"
#include "soundlnx.h"
#if (defined(linux) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)) && BX_SUPPORT_SOUNDLOW
#define LOG_THIS
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
bx_sound_linux_c::bx_sound_linux_c()
:bx_sound_lowlevel_c()
{
midi = NULL;
wave_device[0] = NULL;
wave_device[1] = NULL;
wave_fd[0] = -1;
wave_fd[1] = -1;
BX_INFO(("Sound lowlevel module 'oss' initialized"));
}
bx_sound_linux_c::~bx_sound_linux_c()
{
// nothing for now
}
int bx_sound_linux_c::waveready()
{
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::midiready()
{
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::openmidioutput(const char *mididev)
{
if ((mididev == NULL) || (strlen(mididev) < 1))
return BX_SOUNDLOW_ERR;
midi = fopen(mididev,"w");
if (midi == NULL) {
BX_ERROR(("Couldn't open midi output device %s: %s",
mididev, strerror(errno)));
return BX_SOUNDLOW_ERR;
}
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::sendmidicommand(int delta, int command, int length, Bit8u data[])
{
UNUSED(delta);
fputc(command, midi);
fwrite(data, 1, length, midi);
fflush(midi); // to start playing immediately
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::closemidioutput()
{
fclose(midi);
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::openwaveoutput(const char *wavedev)
{
int length = strlen(wavedev) + 1;
if (wave_device[0] != NULL)
delete [] wave_device[0];
wave_device[0] = new char[length];
if (wave_device[0] == NULL)
return BX_SOUNDLOW_ERR;
strncpy(wave_device[0], wavedev, length);
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::startwaveplayback(int frequency, int bits, bx_bool stereo, int format)
{
int fmt, ret;
int signeddata = format & 1;
if ((wave_device[0] == NULL) || (strlen(wave_device[0]) < 1))
return BX_SOUNDLOW_ERR;
if (wave_fd[0] == -1) {
wave_fd[0] = open(wave_device[0], O_WRONLY);
if (wave_fd[0] == -1) {
return BX_SOUNDLOW_ERR;
} else {
BX_INFO(("OSS: opened output device %s", wave_device[0]));
}
} else {
if ((frequency == wave_ch[0].oldfreq) &&
(bits == wave_ch[0].oldbits) &&
(stereo == wave_ch[0].oldstereo) &&
(format == wave_ch[0].oldformat))
return BX_SOUNDLOW_OK; // nothing to do
}
wave_ch[0].oldfreq = frequency;
wave_ch[0].oldbits = bits;
wave_ch[0].oldstereo = stereo;
wave_ch[0].oldformat = format;
if (bits == 16)
if (signeddata == 1)
fmt = AFMT_S16_LE;
else
fmt = AFMT_U16_LE;
else if (bits == 8)
if (signeddata == 1)
fmt = AFMT_S8;
else
fmt = AFMT_U8;
else
return BX_SOUNDLOW_ERR;
// set frequency etc.
ret = ioctl(wave_fd[0], SNDCTL_DSP_RESET);
if (ret != 0)
BX_DEBUG(("ioctl(SNDCTL_DSP_RESET): %s", strerror(errno)));
/*
ret = ioctl(wave_fd[0], SNDCTL_DSP_SETFRAGMENT, &fragment);
if (ret != 0)
BX_DEBUG(("ioctl(SNDCTL_DSP_SETFRAGMENT, %d): %s",
fragment, strerror(errno)));
*/
ret = ioctl(wave_fd[0], SNDCTL_DSP_SETFMT, &fmt);
if (ret != 0) // abort if the format is unknown, to avoid playing noise
{
BX_DEBUG(("ioctl(SNDCTL_DSP_SETFMT, %d): %s",
fmt, strerror(errno)));
return BX_SOUNDLOW_ERR;
}
ret = ioctl(wave_fd[0], SNDCTL_DSP_STEREO, &stereo);
if (ret != 0)
BX_DEBUG(("ioctl(SNDCTL_DSP_STEREO, %d): %s",
stereo, strerror(errno)));
ret = ioctl(wave_fd[0], SNDCTL_DSP_SPEED, &frequency);
if (ret != 0)
BX_DEBUG(("ioctl(SNDCTL_DSP_SPEED, %d): %s",
frequency, strerror(errno)));
// ioctl(wave_fd[0], SNDCTL_DSP_GETBLKSIZE, &fragment);
// BX_DEBUG(("current output block size is %d", fragment));
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::sendwavepacket(int length, Bit8u data[])
{
if (wave_fd[0] == -1) {
return BX_SOUNDLOW_ERR;
}
int ret = write(wave_fd[0], data, length);
if (ret == length) {
return BX_SOUNDLOW_OK;
} else {
BX_ERROR(("OSS: write error"));
return BX_SOUNDLOW_ERR;
}
}
int bx_sound_linux_c::stopwaveplayback()
{
// ioctl(wave_fd[0], SNDCTL_DSP_SYNC);
// close(wave_fd[0]);
// wave_fd[0] = -1;
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::closewaveoutput()
{
if (wave_device[0] != NULL)
delete(wave_device[0]);
if (wave_fd[0] != -1)
{
close(wave_fd[0]);
wave_fd[0] = -1;
}
wave_device[0] = NULL;
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::openwaveinput(const char *wavedev, sound_record_handler_t rh)
{
record_handler = rh;
if (rh != NULL) {
record_timer_index = bx_pc_system.register_timer(this, record_timer_handler, 1, 1, 0, "soundlnx");
// record timer: inactive, continuous, frequency variable
}
int length = strlen(wavedev) + 1;
if (wave_device[1] != NULL)
delete [] wave_device[1];
wave_device[1] = new char[length];
if (wave_device[1] == NULL)
return BX_SOUNDLOW_ERR;
strncpy(wave_device[1], wavedev, length);
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::startwaverecord(int frequency, int bits, bx_bool stereo, int format)
{
Bit64u timer_val;
Bit8u shift = 0;
int fmt, ret;
int signeddata = format & 1;
if (record_timer_index != BX_NULL_TIMER_HANDLE) {
if (bits == 16) shift++;
if (stereo) shift++;
record_packet_size = (frequency / 10) << shift; // 0.1 sec
if (record_packet_size > BX_SOUNDLOW_WAVEPACKETSIZE) {
record_packet_size = BX_SOUNDLOW_WAVEPACKETSIZE;
}
timer_val = (Bit64u)record_packet_size * 1000000 / (frequency << shift);
bx_pc_system.activate_timer(record_timer_index, (Bit32u)timer_val, 1);
}
if ((wave_device[1] == NULL) || (strlen(wave_device[1]) < 1))
return BX_SOUNDLOW_ERR;
if (wave_fd[1] == -1) {
wave_fd[1] = open(wave_device[1], O_RDONLY);
if (wave_fd[1] == -1) {
return BX_SOUNDLOW_ERR;
} else {
BX_INFO(("OSS: opened input device %s", wave_device[1]));
}
} else {
if ((frequency == wave_ch[0].oldfreq) &&
(bits == wave_ch[0].oldbits) &&
(stereo == wave_ch[0].oldstereo) &&
(format == wave_ch[0].oldformat))
return BX_SOUNDLOW_OK; // nothing to do
}
wave_ch[0].oldfreq = frequency;
wave_ch[0].oldbits = bits;
wave_ch[0].oldstereo = stereo;
wave_ch[0].oldformat = format;
if (bits == 16)
if (signeddata == 1)
fmt = AFMT_S16_LE;
else
fmt = AFMT_U16_LE;
else if (bits == 8)
if (signeddata == 1)
fmt = AFMT_S8;
else
fmt = AFMT_U8;
else
return BX_SOUNDLOW_ERR;
// set frequency etc.
ret = ioctl(wave_fd[1], SNDCTL_DSP_RESET);
if (ret != 0)
BX_DEBUG(("ioctl(SNDCTL_DSP_RESET): %s", strerror(errno)));
ret = ioctl(wave_fd[1], SNDCTL_DSP_SETFMT, &fmt);
if (ret != 0) { // abort if the format is unknown, to avoid playing noise
BX_DEBUG(("ioctl(SNDCTL_DSP_SETFMT, %d): %s",
fmt, strerror(errno)));
return BX_SOUNDLOW_ERR;
}
ret = ioctl(wave_fd[1], SNDCTL_DSP_STEREO, &stereo);
if (ret != 0) {
BX_DEBUG(("ioctl(SNDCTL_DSP_STEREO, %d): %s",
stereo, strerror(errno)));
return BX_SOUNDLOW_ERR;
}
ret = ioctl(wave_fd[1], SNDCTL_DSP_SPEED, &frequency);
if (ret != 0) {
BX_DEBUG(("ioctl(SNDCTL_DSP_SPEED, %d): %s",
frequency, strerror(errno)));
return BX_SOUNDLOW_ERR;
}
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::getwavepacket(int length, Bit8u data[])
{
int ret;
ret = read(wave_fd[1], data, length);
if (ret == length) {
return BX_SOUNDLOW_OK;
} else {
BX_ERROR(("OSS: write error"));
return BX_SOUNDLOW_ERR;
}
}
int bx_sound_linux_c::stopwaverecord()
{
if (record_timer_index != BX_NULL_TIMER_HANDLE) {
bx_pc_system.deactivate_timer(record_timer_index);
}
return BX_SOUNDLOW_OK;
}
int bx_sound_linux_c::closewaveinput()
{
stopwaverecord();
if (wave_device[1] != NULL)
delete(wave_device[1]);
if (wave_fd[1] != -1)
{
close(wave_fd[1]);
wave_fd[1] = -1;
}
wave_device[1] = NULL;
return BX_SOUNDLOW_OK;
}
void bx_sound_linux_c::record_timer_handler(void *this_ptr)
{
bx_sound_linux_c *class_ptr = (bx_sound_linux_c *) this_ptr;
class_ptr->record_timer();
}
void bx_sound_linux_c::record_timer(void)
{
record_handler(this, record_packet_size);
}
#endif
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