mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-23 21:02:50 +00:00
158 lines
3.2 KiB
C
158 lines
3.2 KiB
C
/*
|
|
snd_sdl.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
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <SDL_audio.h>
|
|
#include <SDL_byteorder.h>
|
|
|
|
#include "QF/cmd.h"
|
|
#include "QF/console.h"
|
|
#include "QF/qargs.h"
|
|
#include "QF/sound.h"
|
|
|
|
static dma_t the_shm;
|
|
static int snd_inited;
|
|
|
|
extern int desired_speed;
|
|
extern int desired_bits;
|
|
|
|
static void
|
|
paint_audio (void *unused, Uint8 * stream, int len)
|
|
{
|
|
if (shm) {
|
|
shm->buffer = stream;
|
|
shm->samplepos += len / (shm->samplebits / 8);
|
|
// Check for samplepos overflow?
|
|
S_PaintChannels (shm->samplepos);
|
|
}
|
|
}
|
|
|
|
qboolean
|
|
SNDDMA_Init (void)
|
|
{
|
|
SDL_AudioSpec desired, obtained;
|
|
|
|
snd_inited = 0;
|
|
|
|
/* Set up the desired format */
|
|
desired.freq = desired_speed;
|
|
switch (desired_bits) {
|
|
case 8:
|
|
desired.format = AUDIO_U8;
|
|
break;
|
|
case 16:
|
|
if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
|
|
desired.format = AUDIO_S16MSB;
|
|
else
|
|
desired.format = AUDIO_S16LSB;
|
|
break;
|
|
default:
|
|
Con_Printf ("Unknown number of audio bits: %d\n", desired_bits);
|
|
return 0;
|
|
}
|
|
desired.channels = 2;
|
|
desired.samples = 512;
|
|
desired.callback = paint_audio;
|
|
|
|
/* Open the audio device */
|
|
if (SDL_OpenAudio (&desired, &obtained) < 0) {
|
|
Con_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ());
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure we can support the audio format */
|
|
switch (obtained.format) {
|
|
case AUDIO_U8:
|
|
/* Supported */
|
|
break;
|
|
case AUDIO_S16LSB:
|
|
case AUDIO_S16MSB:
|
|
if (((obtained.format == AUDIO_S16LSB) &&
|
|
(SDL_BYTEORDER == SDL_LIL_ENDIAN)) ||
|
|
((obtained.format == AUDIO_S16MSB) &&
|
|
(SDL_BYTEORDER == SDL_BIG_ENDIAN))) {
|
|
/* Supported */
|
|
break;
|
|
}
|
|
/* Unsupported, fall through */ ;
|
|
default:
|
|
/* Not supported -- force SDL to do our bidding */
|
|
SDL_CloseAudio ();
|
|
if (SDL_OpenAudio (&desired, NULL) < 0) {
|
|
Con_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ());
|
|
return 0;
|
|
}
|
|
memcpy (&obtained, &desired, sizeof (desired));
|
|
break;
|
|
}
|
|
SDL_PauseAudio (0);
|
|
|
|
/* Fill the audio DMA information block */
|
|
shm = &the_shm;
|
|
shm->splitbuffer = 0;
|
|
shm->samplebits = (obtained.format & 0xFF);
|
|
shm->speed = obtained.freq;
|
|
shm->channels = obtained.channels;
|
|
shm->samples = obtained.samples * shm->channels;
|
|
shm->samplepos = 0;
|
|
shm->submission_chunk = 1;
|
|
shm->buffer = NULL;
|
|
|
|
snd_inited = 1;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
SNDDMA_GetDMAPos (void)
|
|
{
|
|
return shm->samplepos;
|
|
}
|
|
|
|
void
|
|
SNDDMA_Shutdown (void)
|
|
{
|
|
if (snd_inited) {
|
|
SDL_CloseAudio ();
|
|
snd_inited = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
SNDDMA_Submit
|
|
|
|
Send sound to device if buffer isn't really the dma buffer
|
|
|
|
*/
|
|
void
|
|
SNDDMA_Submit (void)
|
|
{
|
|
}
|