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/*
Copyright (C) 1997-2001 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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/shm.h>
#include <sys/wait.h>
#ifdef __linux__
#include <linux/soundcard.h>
#else
#include <sys/soundcard.h>
#endif
#include <stdio.h>
#include <errno.h>
#include "com_local.h"
#include "snd_local.h"
static int audio_fd;
static int snd_inited;
static struct audio_buf_info info;
static cvar_t *sndbits;
static cvar_t *sndspeed;
static cvar_t *sndchannels;
static cvar_t *snddevice;
static int tryrates[] = { 22050, 11025, 44100, 48000, 8000 };
static sndinitstat_t OSS_Init ( void ) {
int rc;
int fmt;
int tmp;
int i;
int caps;
if ( snd_inited )
return SIS_SUCCESS;
sndbits = Cvar_Get ( "sndbits", "16", CVAR_ARCHIVE|CVAR_LATCHED );
sndspeed = Cvar_Get ( "sndspeed", "22050", CVAR_ARCHIVE|CVAR_LATCHED );
sndchannels = Cvar_Get ( "sndchannels", "2", CVAR_ARCHIVE|CVAR_LATCHED );
snddevice = Cvar_Get ( "snddevice", "/dev/dsp", CVAR_ARCHIVE|CVAR_LATCHED );
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
audio_fd = open ( snddevice->string, O_RDWR );
if ( audio_fd < 0 ) {
Com_WPrintf ( "Could not open %s: %s\n", snddevice->string,
strerror ( errno ) );
return SIS_FAILURE;
}
if ( ioctl ( audio_fd, SNDCTL_DSP_GETCAPS, &caps ) == -1 ) {
Com_WPrintf ( "Could not get caps of %s: %s\n", snddevice->string,
strerror ( errno ) );
goto fail;
}
if( ( caps & (DSP_CAP_TRIGGER|DSP_CAP_MMAP) ) !=
(DSP_CAP_TRIGGER|DSP_CAP_MMAP) )
{
Com_WPrintf ( "%s does not support TRIGGER and/or MMAP capabilities\n",
snddevice->string );
goto fail;
}
// set sample bits & speed
dma.samplebits = sndbits->integer;
if ( dma.samplebits != 16 && dma.samplebits != 8 ) {
ioctl ( audio_fd, SNDCTL_DSP_GETFMTS, &fmt );
if ( fmt & AFMT_S16_LE ) {
dma.samplebits = 16;
} else if ( fmt & AFMT_U8 ) {
dma.samplebits = 8;
}
}
dma.speed = sndspeed->integer;
if ( !dma.speed ) {
for ( i = 0; i < sizeof ( tryrates ) / 4; i++ ) {
if ( !ioctl ( audio_fd, SNDCTL_DSP_SPEED, &tryrates[i] ) )
break;
}
if ( i == sizeof ( tryrates ) / 4 ) {
Com_WPrintf ( "%s supports no valid bitrates", snddevice->string );
goto fail;
}
dma.speed = tryrates[i];
}
Cvar_ClampInteger ( sndchannels, 1, 2 );
dma.channels = sndchannels->integer;
tmp = 0;
if ( dma.channels == 2 )
tmp = 1;
rc = ioctl ( audio_fd, SNDCTL_DSP_STEREO, &tmp );
if ( rc < 0 ) {
Com_WPrintf ( "Could not set %s to %d channels: %s", snddevice->string,
dma.channels, strerror ( errno ) );
goto fail;
}
if ( tmp )
dma.channels = 2;
else
dma.channels = 1;
rc = ioctl ( audio_fd, SNDCTL_DSP_SPEED, &dma.speed );
if ( rc < 0 ) {
Com_WPrintf ( "Could not set %s speed to %d: %s", snddevice->string,
dma.speed, strerror ( errno ) );
goto fail;
}
if ( dma.samplebits == 16 ) {
rc = AFMT_S16_LE;
rc = ioctl ( audio_fd, SNDCTL_DSP_SETFMT, &rc );
if ( rc < 0 ) {
Com_WPrintf ( "Could not support 16-bit data. Try 8-bit.\n" );
goto fail;
}
} else if ( dma.samplebits == 8 ) {
rc = AFMT_U8;
rc = ioctl ( audio_fd, SNDCTL_DSP_SETFMT, &rc );
if ( rc < 0 ) {
Com_WPrintf ( "Could not support 8-bit data.\n" );
goto fail;
}
} else {
Com_WPrintf ( "%d-bit sound not supported.", dma.samplebits );
goto fail;
}
if ( ioctl ( audio_fd, SNDCTL_DSP_GETOSPACE, &info ) ==-1 ) {
Com_WPrintf ( "Could not do GETOSPACE: %s\n", strerror ( errno ) );
goto fail;
}
dma.samples = info.fragstotal * info.fragsize / ( dma.samplebits >> 3 );
dma.submission_chunk = 1;
// memory map the dma buffer
dma.buffer = ( byte * ) mmap ( NULL, info.fragstotal * info.fragsize,
PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0 );
if ( !dma.buffer ) {
Com_WPrintf ( "Could not mmap %s: %s\n", snddevice->string,
strerror ( errno ) );
goto fail;
}
// toggle the trigger & start her up
tmp = 0;
rc = ioctl ( audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp );
if ( rc < 0 ) {
Com_WPrintf ( "Could not toggle (0): %s\n", strerror ( errno ) );
munmap ( dma.buffer, info.fragstotal * info.fragsize );
goto fail;
}
tmp = PCM_ENABLE_OUTPUT;
rc = ioctl ( audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp );
if ( rc < 0 ) {
Com_WPrintf ( "Could not toggle (PCM_ENABLE_OUTPUT): %s\n",
strerror ( errno ) );
munmap ( dma.buffer, info.fragstotal * info.fragsize );
goto fail;
}
Com_Printf ( "OSS initialization succeeded\n" );
dma.samplepos = 0;
snd_inited = 1;
return SIS_SUCCESS;
fail:
close ( audio_fd );
return SIS_FAILURE;
}
static void OSS_Shutdown ( void ) {
if ( snd_inited ) {
Com_Printf ( "Shutting down OSS\n" );
ioctl ( audio_fd, SNDCTL_DSP_RESET );
munmap ( dma.buffer, info.fragstotal * info.fragsize );
close ( audio_fd );
snd_inited = qfalse;
}
}
static void OSS_BeginPainting ( void ) {
struct count_info count;
if ( !snd_inited )
return;
if ( ioctl ( audio_fd, SNDCTL_DSP_GETOPTR, &count ) == -1 ) {
Com_EPrintf ( "SNDCTL_DSP_GETOPTR failed on %s: %s\n",
snddevice->string, strerror ( errno ) );
OSS_Shutdown();
return;
}
dma.samplepos = count.ptr / ( dma.samplebits >> 3 );
}
static void OSS_Submit ( void ) {
}
static void OSS_Activate ( qboolean active ) {
}
void OSS_FillAPI ( snddmaAPI_t *api ) {
api->Init = OSS_Init;
api->Shutdown = OSS_Shutdown;
api->BeginPainting = OSS_BeginPainting;
api->Submit = OSS_Submit;
api->Activate = OSS_Activate;
}
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