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https://github.com/id-Software/Quake.git
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The Quake sources as originally release under the GPL license on December 21, 1999
This commit is contained in:
Travis Bradshaw
218
WinQuake/snd_sun.c
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218
WinQuake/snd_sun.c
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/*
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <sys/audioio.h>
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#include <errno.h>
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#include "quakedef.h"
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int audio_fd;
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int snd_inited;
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static int bufpos;
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static int wbufp;
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static audio_info_t info;
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#define BUFFER_SIZE 8192
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unsigned char dma_buffer[BUFFER_SIZE];
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unsigned char pend_buffer[BUFFER_SIZE];
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int pending;
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static int lastwrite = 0;
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qboolean SNDDMA_Init(void)
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{
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int rc;
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int fmt;
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int tmp;
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int i;
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char *s;
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int caps;
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if (snd_inited) {
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printf("Sound already init'd\n");
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return;
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}
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shm = &sn;
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shm->splitbuffer = 0;
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audio_fd = open("/dev/audio", O_WRONLY|O_NDELAY);
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if (audio_fd < 0) {
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if (errno == EBUSY) {
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Con_Printf("Audio device is being used by another process\n");
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}
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perror("/dev/audio");
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Con_Printf("Could not open /dev/audio\n");
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return (0);
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}
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if (ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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perror("/dev/audio");
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Con_Printf("Could not communicate with audio device.\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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// set to nonblock
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//
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if (fcntl(audio_fd, F_SETFL, O_NONBLOCK) < 0) {
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perror("/dev/audio");
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close(audio_fd);
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return 0;
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}
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AUDIO_INITINFO(&info);
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shm->speed = 11025;
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// try 16 bit stereo
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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info.play.sample_rate = 11025;
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info.play.channels = 2;
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info.play.precision = 16;
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if (ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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info.play.sample_rate = 11025;
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info.play.channels = 1;
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info.play.precision = 16;
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if (ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
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Con_Printf("Incapable sound hardware.\n");
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close(audio_fd);
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return 0;
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}
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Con_Printf("16 bit mono sound initialized\n");
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shm->samplebits = 16;
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shm->channels = 1;
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} else { // 16 bit stereo
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Con_Printf("16 bit stereo sound initialized\n");
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shm->samplebits = 16;
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shm->channels = 2;
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}
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shm->soundalive = true;
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shm->samples = sizeof(dma_buffer) / (shm->samplebits/8);
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shm->samplepos = 0;
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shm->submission_chunk = 1;
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shm->buffer = (unsigned char *)dma_buffer;
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snd_inited = 1;
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return 1;
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}
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int SNDDMA_GetDMAPos(void)
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{
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if (!snd_inited)
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return (0);
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if (ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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perror("/dev/audio");
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Con_Printf("Could not communicate with audio device.\n");
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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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return ((info.play.samples*shm->channels) % shm->samples);
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}
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int SNDDMA_GetSamples(void)
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{
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if (!snd_inited)
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return (0);
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if (ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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perror("/dev/audio");
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Con_Printf("Could not communicate with audio device.\n");
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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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return info.play.samples;
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}
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void SNDDMA_Shutdown(void)
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{
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if (snd_inited) {
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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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==============
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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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*/
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void SNDDMA_Submit(void)
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{
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int samps;
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int bsize;
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int bytes, b;
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static unsigned char writebuf[1024];
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unsigned char *p;
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int idx;
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int stop = paintedtime;
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extern int soundtime;
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if (paintedtime < wbufp)
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wbufp = 0; // reset
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bsize = shm->channels * (shm->samplebits/8);
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bytes = (paintedtime - wbufp) * bsize;
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if (!bytes)
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return;
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if (bytes > sizeof(writebuf)) {
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bytes = sizeof(writebuf);
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stop = wbufp + bytes/bsize;
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}
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p = writebuf;
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idx = (wbufp*bsize) & (BUFFER_SIZE - 1);
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for (b = bytes; b; b--) {
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*p++ = dma_buffer[idx];
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idx = (idx + 1) & (BUFFER_SIZE - 1);
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}
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wbufp = stop;
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if (write(audio_fd, writebuf, bytes) < bytes)
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printf("audio can't keep up!\n");
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}
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