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/***************************************************************************
* S3m/Mod player by Daniel Marks (dmarks@ais.net)
* GUS support by David Jeske (jeske@uiuc.edu)
*
* (C) 1994,1995 By Daniel Marks and David Jeske
*
* While we retain the copyright to this code, this source code is FREE.
* You may use it in any way you wish, in any product you wish. You may
* NOT steal the copyright for this code from us.
*
* We respectfully ask that you email one of us, if possible, if you
* produce something significant with this code, or if you have any bug
* fixes to contribute. We also request that you give credit where
* credit is due if you include part of this code in a program of your own.
*
* Email: s3mod@uiuc.edu
* jeske@uiuc.edu
*
* See the associated README file for Thanks
***************************************************************************
*
* linux_dsp.c - Support for the Linux DSP driver from the Voxware(C) Drivers.
*/
#ifdef LINUX
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <linux/soundcard.h>
#include <bytesex.h>
#include "main.h"
#include "dsp.h"
static int audio;
int get_dsp_device(void)
{
uint32 j;
audio=open("/dev/dsp",O_WRONLY,0);
if (audio < 1)
{
printf("Could not open audio device!\n");
exit(1);
}
if (stereo)
{
if (ioctl(audio,SNDCTL_DSP_STEREO,&stereo) == -1)
stereo = 0;
}
if (bit16)
{
j = 16;
if (ioctl(audio,SNDCTL_DSP_SAMPLESIZE,&j) == -1) bit16 = 0;
if (j != 16) bit16 = 0;
}
j = mixspeed;
if (ioctl(audio,SNDCTL_DSP_SPEED,&j) == -1)
{
printf("Error setting sample speed\n");
exit(1);
}
mixspeed = j;
if (ioctl(audio,SNDCTL_DSP_GETBLKSIZE, &audio_buffer_size) == -1)
{
printf("Unable to get audio blocksize\n");
exit(1);
}
if ((audio_buffer_size < 4096) || (audio_buffer_size > 131072))
{
printf("Invalid audio buffer size: %d\n",audio_buffer_size);
exit(1);
}
if (!(audio_start_buffer = (uint8 *) malloc(audio_buffer_size)))
{
printf("Could not get audio buffer memory!\n");
exit(1);
}
audio_end_buffer = &audio_start_buffer[audio_buffer_size];
audio_curptr = audio_start_buffer;
return;
}
void write_dsp_device(void *buf, int size) {
write(audio,audio_start_buffer,audio_buffer_size);
return;
}
void close_dsp_device() {
close(audio);
return;
}
#endif /* ?LINUX */
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