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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: linux.c,v 1.3 1997/01/26 07:45:01 b1 Exp $
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
//
// $Log: linux.c,v $
// Revision 1.3 1997/01/26 07:45:01 b1
// 2nd formatting run, fixed a few warnings as well.
//
// Revision 1.2 1997/01/21 19:00:01 b1
// First formatting run:
// using Emacs cc-mode.el indentation for C++ now.
//
// Revision 1.1 1997/01/19 17:22:45 b1
// Initial check in DOOM sources as of Jan. 10th, 1997
//
//
// DESCRIPTION:
// UNIX, soundserver for Linux i386.
//
//-----------------------------------------------------------------------------
static const char rcsid[] = "$Id: linux.c,v 1.3 1997/01/26 07:45:01 b1 Exp $";
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/soundcard.h>
#include "soundsrv.h"
int audio_fd;
void
myioctl
( int fd,
int command,
int* arg )
{
int rc;
extern int errno;
rc = ioctl(fd, command, arg);
if (rc < 0)
{
fprintf(stderr, "ioctl(dsp,%d,arg) failed\n", command);
fprintf(stderr, "errno=%d\n", errno);
exit(-1);
}
}
void I_InitMusic(void)
{
}
void
I_InitSound
( int samplerate,
int samplesize )
{
int i;
audio_fd = open("/dev/dsp", O_WRONLY);
if (audio_fd<0)
fprintf(stderr, "Could not open /dev/dsp\n");
i = 11 | (2<<16);
myioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &i);
myioctl(audio_fd, SNDCTL_DSP_RESET, 0);
i=11025;
myioctl(audio_fd, SNDCTL_DSP_SPEED, &i);
i=1;
myioctl(audio_fd, SNDCTL_DSP_STEREO, &i);
myioctl(audio_fd, SNDCTL_DSP_GETFMTS, &i);
if (i&=AFMT_S16_LE)
myioctl(audio_fd, SNDCTL_DSP_SETFMT, &i);
else
{
if (!snd_16bit)
{
fprintf(stderr, "Could not play signed 16 data using 8 bit\n");
snd_8bit=1;
}
}
}
void
I_SubmitOutputBuffer
( void* samples,
int samplecount )
{
if (! snd_8bit)
write(audio_fd, samples, samplecount*4);
else {
/* 8bit sound support by wakko@kitenet.net. */
int count;
unsigned short s[1024];
unsigned char b[1024];
memcpy(s, samples, samplecount*4);
for(count=0;count<samplecount*2;count++)
{
s[count] ^= 0x8000;
b[count] = (s[count]>>8);
}
write(audio_fd, b, samplecount*2);
}
}
void I_ShutdownSound(void)
{
close(audio_fd);
}
void I_ShutdownMusic(void)
{
}
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