mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-05 12:40:35 +00:00
a7f1e1185b
<Alexander@Leidinger.net>
401 lines
9.8 KiB
C
401 lines
9.8 KiB
C
/*
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snd_oss.c
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OSS sound output plugin.
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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static const char rcsid[] =
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"$Id$";
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#ifdef HAVE_SYS_SOUNDCARD_H
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# include <sys/soundcard.h>
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#elif defined HAVE_LINUX_SOUNDCARD_H
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# include <linux/soundcard.h>
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#elif HAVE_MACHINE_SOUNDCARD_H
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# include <machine/soundcard.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/shm.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "QF/cmd.h"
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#include "QF/cvar.h"
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#include "QF/plugin.h"
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#include "QF/qargs.h"
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#include "QF/sound.h"
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#include "QF/sys.h"
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#ifndef MAP_FAILED
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# define MAP_FAILED ((void *) -1)
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#endif
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static int audio_fd;
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static int snd_inited;
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static int mmaped_io = 0;
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static const char *snd_dev = "/dev/dsp";
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static volatile dma_t sn;
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static cvar_t *snd_stereo;
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static cvar_t *snd_rate;
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static cvar_t *snd_device;
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static cvar_t *snd_bits;
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static cvar_t *snd_oss_mmaped;
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static int tryrates[] = { 11025, 22050, 22051, 44100, 8000 };
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static plugin_t plugin_info;
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static plugin_data_t plugin_info_data;
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static plugin_funcs_t plugin_info_funcs;
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static general_data_t plugin_info_general_data;
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static general_funcs_t plugin_info_general_funcs;
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static snd_output_data_t plugin_info_snd_output_data;
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static snd_output_funcs_t plugin_info_snd_output_funcs;
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static void
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SNDDMA_Init_Cvars (void)
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{
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snd_stereo = Cvar_Get ("snd_stereo", "1", CVAR_ROM, NULL,
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"sound stereo output");
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snd_rate = Cvar_Get ("snd_rate", "0", CVAR_ROM, NULL,
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"sound playback rate. 0 is system default");
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snd_device = Cvar_Get ("snd_device", "", CVAR_ROM, NULL,
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"sound device. \"\" is system default");
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snd_bits = Cvar_Get ("snd_bits", "0", CVAR_ROM, NULL,
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"sound sample depth. 0 is system default");
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snd_oss_mmaped = Cvar_Get ("snd_oss_mmaped", "1", CVAR_ROM, NULL,
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"mmaped io");
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}
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static qboolean
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SNDDMA_Init (void)
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{
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int caps, fmt, rc, tmp, i;
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int retries = 3;
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struct audio_buf_info info;
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snd_inited = 0;
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mmaped_io = snd_oss_mmaped->int_val;
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// open snd_dev, confirm capability to mmap, and get size of dma buffer
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if (snd_device->string[0])
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snd_dev = snd_device->string;
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audio_fd = open (snd_dev, O_RDWR);
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if (audio_fd < 0) { // Failed open, retry up to 3 times
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// if it's busy
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while ((audio_fd < 0) && retries-- &&
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((errno == EAGAIN) || (errno == EBUSY))) {
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sleep (1);
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audio_fd = open (snd_dev, O_RDWR);
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}
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if (audio_fd < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not open %s\n", snd_dev);
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return 0;
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}
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}
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if ((rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0)) < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not reset %s\n", snd_dev);
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close (audio_fd);
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return 0;
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}
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if (ioctl (audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) {
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perror (snd_dev);
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Sys_Printf ("Sound driver too old\n");
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close (audio_fd);
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return 0;
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}
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if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) {
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Sys_Printf ("Sound device can't do memory-mapped I/O.\n");
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close (audio_fd);
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return 0;
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}
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if (ioctl (audio_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) {
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perror ("GETOSPACE");
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Sys_Printf ("Um, can't do GETOSPACE?\n");
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close (audio_fd);
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return 0;
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}
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shm = &sn;
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shm->splitbuffer = 0;
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// set sample bits & speed
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shm->samplebits = snd_bits->int_val;
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if (shm->samplebits != 16 && shm->samplebits != 8) {
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ioctl (audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
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if (fmt & AFMT_S16_LE) { // little-endian 16-bit signed
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shm->samplebits = 16;
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} else {
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if (fmt & AFMT_U8) { // unsigned 8-bit ulaw
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shm->samplebits = 8;
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}
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}
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}
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if (snd_rate->int_val) {
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shm->speed = snd_rate->int_val;
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} else {
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for (i = 0; i < (sizeof (tryrates) / 4); i++)
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if (!ioctl (audio_fd, SNDCTL_DSP_SPEED, &tryrates[i]))
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break;
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shm->speed = tryrates[i];
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}
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if (!snd_stereo->int_val) {
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shm->channels = 1;
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} else {
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shm->channels = 2;
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}
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shm->samples = info.fragstotal * info.fragsize / (shm->samplebits / 8);
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shm->submission_chunk = 1;
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tmp = 0;
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if (shm->channels == 2)
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tmp = 1;
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rc = ioctl (audio_fd, SNDCTL_DSP_STEREO, &tmp);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not set %s to stereo=%d", snd_dev, shm->channels);
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close (audio_fd);
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return 0;
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}
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if (tmp)
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shm->channels = 2;
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else
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shm->channels = 1;
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rc = ioctl (audio_fd, SNDCTL_DSP_SPEED, &shm->speed);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not set %s speed to %d", snd_dev, shm->speed);
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close (audio_fd);
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return 0;
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}
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if (shm->samplebits == 16) {
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rc = AFMT_S16_LE;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not support 16-bit data. Try 8-bit.\n");
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close (audio_fd);
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return 0;
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}
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} else if (shm->samplebits == 8) {
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rc = AFMT_U8;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not support 8-bit data.\n");
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close (audio_fd);
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return 0;
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}
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} else {
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perror (snd_dev);
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Sys_Printf ("%d-bit sound not supported.", shm->samplebits);
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close (audio_fd);
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return 0;
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}
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if (mmaped_io) {
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// memory map the dma buffer
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shm->buffer = (unsigned char *) mmap
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(NULL, info.fragstotal * info.fragsize, PROT_WRITE,
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MAP_FILE | MAP_SHARED, audio_fd, 0);
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if (shm->buffer == MAP_FAILED) {
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perror (snd_dev);
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Sys_Printf ("Could not mmap %s\n", snd_dev);
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close (audio_fd);
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return 0;
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}
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} else {
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shm->buffer = malloc (shm->samples * (shm->samplebits / 8) * 2);
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if (!shm->buffer) {
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Sys_Printf ("SNDDMA_Init: memory allocation failure\n");
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close (audio_fd);
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return 0;
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}
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}
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// toggle the trigger & start her up
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tmp = 0;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not toggle.\n");
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if (mmaped_io)
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munmap (shm->buffer, shm->samples * shm->samplebits / 8);
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close (audio_fd);
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return 0;
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}
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tmp = PCM_ENABLE_OUTPUT;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0) {
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perror (snd_dev);
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Sys_Printf ("Could not toggle.\n");
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if (mmaped_io)
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munmap (shm->buffer, shm->samples * shm->samplebits / 8);
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close (audio_fd);
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return 0;
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}
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shm->samplepos = 0;
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snd_inited = 1;
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return 1;
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}
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static int
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SNDDMA_GetDMAPos (void)
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{
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struct count_info count;
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if (!snd_inited)
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return 0;
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if (ioctl (audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) {
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perror (snd_dev);
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Sys_Printf ("Uh, sound dead.\n");
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if (mmaped_io)
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munmap (shm->buffer, shm->samples * shm->samplebits / 8);
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close (audio_fd);
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snd_inited = 0;
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return 0;
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}
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// shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1);
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// fprintf(stderr, "%d \r", count.ptr);
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shm->samplepos = count.ptr / (shm->samplebits / 8);
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return shm->samplepos;
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}
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static void
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SNDDMA_Shutdown (void)
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{
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if (snd_inited) {
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if (mmaped_io)
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munmap (shm->buffer, shm->samples * shm->samplebits / 8);
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close (audio_fd);
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snd_inited = 0;
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}
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}
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/*
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SNDDMA_Submit
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Send sound to device if buffer isn't really the dma buffer
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*/
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#define BITSIZE (shm->samplebits / 8)
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#define BYTES (samples / BITSIZE)
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static void
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SNDDMA_Submit (void)
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{
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int samples;
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if (snd_inited && !mmaped_io) {
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samples = *plugin_info_snd_output_data.paintedtime
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- *plugin_info_snd_output_data.soundtime;
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if (shm->samplepos + BYTES <= shm->samples)
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write (audio_fd, shm->buffer + BYTES, samples);
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else {
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write (audio_fd, shm->buffer + BYTES, shm->samples -
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shm->samplepos);
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write (audio_fd, shm->buffer, BYTES - (shm->samples -
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shm->samplepos));
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}
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*plugin_info_snd_output_data.soundtime += samples;
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}
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}
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static void
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SNDDMA_BlockSound (void)
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{
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}
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static void
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SNDDMA_UnblockSound (void)
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{
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}
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QFPLUGIN plugin_t *
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PLUGIN_INFO(snd_output, oss) (void) {
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plugin_info.type = qfp_snd_output;
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plugin_info.api_version = QFPLUGIN_VERSION;
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plugin_info.plugin_version = "0.1";
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plugin_info.description = "OSS digital output";
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plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n"
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"Copyright (C) 1999,2000,2001 contributors of the QuakeForge "
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"project\n"
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"Please see the file \"AUTHORS\" for a list of contributors";
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plugin_info.functions = &plugin_info_funcs;
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plugin_info.data = &plugin_info_data;
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plugin_info_data.general = &plugin_info_general_data;
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plugin_info_data.input = NULL;
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plugin_info_data.snd_output = &plugin_info_snd_output_data;
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plugin_info_funcs.general = &plugin_info_general_funcs;
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plugin_info_funcs.input = NULL;
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plugin_info_funcs.snd_output = &plugin_info_snd_output_funcs;
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plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars;
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plugin_info_general_funcs.p_Shutdown = NULL;
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plugin_info_snd_output_funcs.pS_O_Init = SNDDMA_Init;
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plugin_info_snd_output_funcs.pS_O_Shutdown = SNDDMA_Shutdown;
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plugin_info_snd_output_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos;
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plugin_info_snd_output_funcs.pS_O_Submit = SNDDMA_Submit;
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plugin_info_snd_output_funcs.pS_O_BlockSound = SNDDMA_BlockSound;
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plugin_info_snd_output_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound;
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return &plugin_info;
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}
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