quakeforge/libs/audio/targets/snd_sgi.c

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/*
snd_sgi.c
sound support for sgi
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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <dmedia/audio.h>
#include <stdlib.h>
#include "QF/qargs.h"
#include "QF/qtypes.h"
#include "QF/sys.h"
#include "snd_internal.h"
static int snd_inited = 0;
static ALconfig alc;
static ALport alp;
static int tryrates[] = { 11025, 22050, 44100, 8000 };
static unsigned char *dma_buffer, *write_buffer;
static int bufsize;
static int wbufp;
static int framecount;
static volatile dma_t sn;
static plugin_t plugin_info;
static plugin_data_t plugin_info_data;
static plugin_funcs_t plugin_info_funcs;
static general_data_t plugin_info_general_data;
static general_funcs_t plugin_info_general_funcs;
static snd_output_data_t plugin_info_snd_output_data;
static snd_output_funcs_t plugin_info_snd_output_funcs;
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static volatile dma_t *
SNDDMA_Init (void)
{
char *s;
int i;
ALpv alpv;
alc = alNewConfig ();
if (!alc) {
Sys_Printf ("Could not make an new sound config: %s\n",
alGetErrorString (oserror ()));
return 0;
}
/* get & probe settings */
/* sample format */
if (alSetSampFmt (alc, AL_SAMPFMT_TWOSCOMP) < 0) {
Sys_Printf ("Could not sample format of default output to two's "
"complement\n");
alFreeConfig (alc);
return 0;
}
/* sample bits */
s = getenv ("QUAKE_SOUND_SAMPLEBITS");
if (s)
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sn.samplebits = atoi (s);
else if ((i = COM_CheckParm ("-sndbits")) != 0)
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sn.samplebits = atoi (com_argv[i + 1]);
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if (sn.samplebits != 16 && sn.samplebits != 8) {
alpv.param = AL_WORDSIZE;
if (alGetParams (AL_DEFAULT_OUTPUT, &alpv, 1) < 0) {
Sys_Printf ("Could not get supported wordsize of default "
"output: %s\n", alGetErrorString (oserror ()));
return 0;
}
if (alpv.value.i >= 16) {
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sn.samplebits = 16;
} else {
if (alpv.value.i >= 8)
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sn.samplebits = 8;
else {
Sys_Printf ("Sound disabled since interface "
"doesn't even support 8 bit.");
alFreeConfig (alc);
return 0;
}
}
}
/* sample rate */
s = getenv ("QUAKE_SOUND_SPEED");
if (s)
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sn.speed = atoi (s);
else if ((i = COM_CheckParm ("-sndspeed")) != 0)
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sn.speed = atoi (com_argv[i + 1]);
else {
alpv.param = AL_RATE;
for (i = 0; i < sizeof (tryrates) / sizeof (int); i++) {
alpv.value.ll = alDoubleToFixed (tryrates[i]);
if (alSetParams (AL_DEFAULT_OUTPUT, &alpv, 1) >= 0)
break;
}
if (i >= sizeof (tryrates) / sizeof (int)) {
Sys_Printf ("Sound disabled since interface doesn't even "
"support a sample rate of %d\n", tryrates[i - 1]);
alFreeConfig (alc);
return 0;
}
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sn.speed = tryrates[i];
}
/* channels */
s = getenv ("QUAKE_SOUND_CHANNELS");
if (s)
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sn.channels = atoi (s);
else if ((i = COM_CheckParm ("-sndmono")) != 0)
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sn.channels = 1;
else if ((i = COM_CheckParm ("-sndstereo")) != 0)
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sn.channels = 2;
else
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sn.channels = 2;
/* set 'em */
/* channels */
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while (sn.channels > 0) {
if (alSetChannels (alc, sn.channels) < 0) {
Sys_Printf ("Unable to set number of channels to %d, "
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"trying half\n", sn.channels);
sn.channels /= 2;
} else
break;
}
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if (sn.channels <= 0) {
Sys_Printf ("Sound disabled since interface doesn't even support 1 "
"channel\n");
alFreeConfig (alc);
return 0;
}
/* sample rate */
alpv.param = AL_RATE;
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alpv.value.ll = alDoubleToFixed (sn.speed);
if (alSetParams (AL_DEFAULT_OUTPUT, &alpv, 1) < 0) {
Sys_Printf ("Could not set samplerate of default output to %d: %s\n",
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sn.speed, alGetErrorString (oserror ()));
alFreeConfig (alc);
return 0;
}
/* set sizes of buffers relative to sizes of those for the 'standard'
frequency of 11025 use *huge* buffers since at least my indigo2
has enough to do to get sound on the way anyway
*/
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bufsize = 32768 * (int) ((double) sn.speed / 11025.0);
dma_buffer = malloc (bufsize);
if (dma_buffer == NULL) {
Sys_Printf ("Could not get %d bytes of memory for audio dma buffer\n",
bufsize);
alFreeConfig (alc);
return 0;
}
write_buffer = malloc (bufsize);
if (write_buffer == NULL) {
Sys_Printf ("Could not get %d bytes of memory for audio write "
"buffer\n", bufsize);
free (dma_buffer);
alFreeConfig (alc);
return 0;
}
/* sample bits */
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switch (sn.samplebits) {
case 24:
i = AL_SAMPLE_24;
break;
case 16:
i = AL_SAMPLE_16;
break;
default:
i = AL_SAMPLE_8;
break;
}
if (alSetWidth (alc, i) < 0) {
Sys_Printf ("Could not set wordsize of default output to %d: %s\n",
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sn.samplebits, alGetErrorString (oserror ()));
free (write_buffer);
free (dma_buffer);
alFreeConfig (alc);
return 0;
}
alp = alOpenPort ("quakeforge", "w", alc);
if (!alp) {
Sys_Printf ("Could not open sound port: %s\n",
alGetErrorString (oserror ()));
free (write_buffer);
free (dma_buffer);
alFreeConfig (alc);
return 0;
}
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sn.samples = bufsize / (sn.samplebits / 8);
sn.samplepos = 0;
sn.submission_chunk = 1;
sn.buffer = dma_buffer;
framecount = 0;
snd_inited = 1;
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return &sn;
}
static void
SNDDMA_Init_Cvars (void)
{
}
static int
SNDDMA_GetDMAPos (void)
{
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/* Sys_Printf("framecount: %d %d\n", (framecount * sn.channels) %
sn.samples, alGetFilled(alp)); */
sn.samplepos = ((framecount - alGetFilled (alp))
* sn.channels) % sn.samples;
return sn.samplepos;
}
static void
SNDDMA_Shutdown (void)
{
if (snd_inited) {
free (write_buffer);
free (dma_buffer);
alClosePort (alp);
alFreeConfig (alc);
snd_inited = 0;
}
}
/*
SNDDMA_Submit
Send sound to device if buffer isn't really the dma buffer
*/
static void
SNDDMA_Submit (void)
{
unsigned char *p;
int bsize, bytes, idx, b;
int stop = *plugin_info_snd_output_data.paintedtime;
if (snd_blocked)
return;
if (*plugin_info_snd_output_data.paintedtime < wbufp)
wbufp = 0; // reset
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bsize = sn.channels * (sn.samplebits / 8);
bytes = (*plugin_info_snd_output_data.paintedtime - wbufp) * bsize;
if (!bytes)
return;
if (bytes > bufsize) {
bytes = bufsize;
stop = wbufp + bytes / bsize;
}
p = write_buffer;
idx = (wbufp * bsize) & (bufsize - 1);
for (b = bytes; b; b--) {
*p++ = dma_buffer[idx];
idx = (idx + 1) & (bufsize - 1);
}
wbufp = stop;
alWriteFrames (alp, write_buffer, bytes / bsize);
framecount += bytes / bsize;
}
static void
SNDDMA_BlockSound (void)
{
}
static void
SNDDMA_UnblockSound (void)
{
}
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PLUGIN_INFO(snd_output, sgi)
{
plugin_info.type = qfp_snd_output;
plugin_info.api_version = QFPLUGIN_VERSION;
plugin_info.plugin_version = "0.1";
plugin_info.description = "SGI IRIX digital output";
plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n"
"Copyright (C) 1999,2000,2001 contributors of the QuakeForge "
"project\n"
"Please see the file \"AUTHORS\" for a list of contributors";
plugin_info.functions = &plugin_info_funcs;
plugin_info.data = &plugin_info_data;
plugin_info_data.general = &plugin_info_general_data;
plugin_info_data.input = NULL;
plugin_info_data.snd_output = &plugin_info_snd_output_data;
plugin_info_funcs.general = &plugin_info_general_funcs;
plugin_info_funcs.input = NULL;
plugin_info_funcs.snd_output = &plugin_info_snd_output_funcs;
plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars;
plugin_info_general_funcs.p_Shutdown = NULL;
plugin_info_snd_output_funcs.pS_O_Init = SNDDMA_Init;
plugin_info_snd_output_funcs.pS_O_Shutdown = SNDDMA_Shutdown;
plugin_info_snd_output_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos;
plugin_info_snd_output_funcs.pS_O_Submit = SNDDMA_Submit;
plugin_info_snd_output_funcs.pS_O_BlockSound = SNDDMA_BlockSound;
plugin_info_snd_output_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound;
return &plugin_info;
}