newtree/source/snd_oss.c

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/*
snd_oss.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
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#ifdef HAVE_CONFIG_H
# include "config.h"
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#endif
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#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/shm.h>
#include <sys/wait.h>
#include <errno.h>
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#include <stdio.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#if defined HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
#elif defined HAVE_LINUX_SOUNDCARD_H
# include <linux/soundcard.h>
#elif HAVE_MACHINE_SOUNDCARD_H
# include <machine/soundcard.h>
#endif
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#include "cmd.h"
#include "console.h"
#include "qargs.h"
#include "sound.h"
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#ifndef MAP_FAILED
# define MAP_FAILED ((void *) -1)
#endif
int audio_fd;
int snd_inited;
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static int tryrates[] = { 11025, 22050, 22051, 44100, 8000 };
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qboolean
SNDDMA_Init (void)
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{
int rc;
int fmt;
int tmp;
int i;
char *s;
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struct audio_buf_info info;
int caps;
int retries = 3;
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snd_inited = 0;
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
audio_fd = open ("/dev/dsp", O_RDWR);
if (audio_fd < 0) { // Failed open, retry up to 3 times
// if it's busy
while ((audio_fd < 0) && retries-- &&
((errno == EAGAIN) || (errno == EBUSY))) {
sleep (1);
audio_fd = open ("/dev/dsp", O_RDWR);
}
if (audio_fd < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not open /dev/dsp\n");
return 0;
}
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}
if ((rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0)) < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not reset /dev/dsp\n");
close (audio_fd);
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return 0;
}
if (ioctl (audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) {
perror ("/dev/dsp");
Con_Printf ("Sound driver too old\n");
close (audio_fd);
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return 0;
}
if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) {
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Con_Printf ("Sound device can't do memory-mapped I/O.\n");
close (audio_fd);
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return 0;
}
if (ioctl (audio_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) {
perror ("GETOSPACE");
Con_Printf ("Um, can't do GETOSPACE?\n");
close (audio_fd);
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return 0;
}
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shm = &sn;
shm->splitbuffer = 0;
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// set sample bits & speed
if ((i = COM_CheckParm ("-sndbits"))) {
shm->samplebits = atoi (com_argv[i + 1]);
} else {
if ((s = getenv ("QF_SND_BITS"))) {
shm->samplebits = atoi (s);
}
}
if (shm->samplebits != 16 && shm->samplebits != 8) {
ioctl (audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
if (fmt & AFMT_S16_LE) { // little-endian 16-bit signed
shm->samplebits = 16;
} else {
if (fmt & AFMT_U8) { // unsigned 8-bit ulaw
shm->samplebits = 8;
}
}
}
if ((i = COM_CheckParm ("-sndspeed"))) {
shm->speed = atoi (com_argv[i + 1]);
} else if ((s = getenv ("QF_SND_SPEED"))) {
shm->speed = atoi (s);
} else {
for (i = 0; i < (sizeof (tryrates) / 4); i++)
if (!ioctl (audio_fd, SNDCTL_DSP_SPEED, &tryrates[i]))
break;
shm->speed = tryrates[i];
}
if ((i = COM_CheckParm ("-sndmono"))) {
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shm->channels = 1;
} else if ((i = COM_CheckParm ("-sndstereo"))) {
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shm->channels = 2;
} else if ((s = getenv ("QF_SND_CHANNELS"))) {
shm->channels = atoi (s);
} else {
shm->channels = 2;
}
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shm->samples = info.fragstotal * info.fragsize / (shm->samplebits / 8);
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shm->submission_chunk = 1;
// memory map the dma buffer
shm->buffer = (unsigned char *) mmap (NULL, info.fragstotal
* info.fragsize,
PROT_READ | PROT_WRITE,
MAP_FILE | MAP_SHARED, audio_fd, 0);
if (shm->buffer == MAP_FAILED) {
perror ("/dev/dsp");
Con_Printf ("Could not mmap /dev/dsp\n");
close (audio_fd);
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return 0;
}
tmp = 0;
if (shm->channels == 2)
tmp = 1;
rc = ioctl (audio_fd, SNDCTL_DSP_STEREO, &tmp);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not set /dev/dsp to stereo=%d", shm->channels);
close (audio_fd);
return 0;
}
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if (tmp)
shm->channels = 2;
else
shm->channels = 1;
rc = ioctl (audio_fd, SNDCTL_DSP_SPEED, &shm->speed);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not set /dev/dsp speed to %d", shm->speed);
close (audio_fd);
return 0;
}
if (shm->samplebits == 16) {
rc = AFMT_S16_LE;
rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not support 16-bit data. Try 8-bit.\n");
close (audio_fd);
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return 0;
}
} else if (shm->samplebits == 8) {
rc = AFMT_U8;
rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not support 8-bit data.\n");
close (audio_fd);
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return 0;
}
} else {
perror ("/dev/dsp");
Con_Printf ("%d-bit sound not supported.", shm->samplebits);
close (audio_fd);
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return 0;
}
// toggle the trigger & start her up
tmp = 0;
rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not toggle.\n");
close (audio_fd);
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return 0;
}
tmp = PCM_ENABLE_OUTPUT;
rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
if (rc < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not toggle.\n");
close (audio_fd);
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return 0;
}
shm->samplepos = 0;
snd_inited = 1;
return 1;
}
int
SNDDMA_GetDMAPos (void)
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{
struct count_info count;
if (!snd_inited)
return 0;
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if (ioctl (audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) {
perror ("/dev/dsp");
Con_Printf ("Uh, sound dead.\n");
close (audio_fd);
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snd_inited = 0;
return 0;
}
// shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1);
// fprintf(stderr, "%d \r", count.ptr);
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shm->samplepos = count.ptr / (shm->samplebits / 8);
return shm->samplepos;
}
void
SNDDMA_Shutdown (void)
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{
if (snd_inited) {
close (audio_fd);
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snd_inited = 0;
}
}
/*
==============
SNDDMA_Submit
Send sound to device if buffer isn't really the dma buffer
===============
*/
void
SNDDMA_Submit (void)
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{
}