39429549e3
Original by Maurices Nonnekes, a few tweaks (sound, i386 optimizations, longer save menus) by me. The client/server part probably still needs some work... and it is definitely unaudited. Packaging might be changed to account for docs... In fact, I really need `common' package files and reference counting...
177 lines
3.8 KiB
C
177 lines
3.8 KiB
C
/*
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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 "quakedef.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 <fcntl.h>
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#include <sys/types.h>
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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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# include <sys/audioio.h>
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static int audio_fd;
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static int snd_inited;
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static int tryrates[] = { 11025, 22051, 44100, 8000 };
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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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audio_info_t info;
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int caps;
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snd_inited = 0;
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// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
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// XXX Must open audio Read-Write for now for dma to work !!!
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audio_fd = open("/dev/audio", O_RDWR);
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if (audio_fd < 0)
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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_GETPROPS, &caps)==-1)
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{
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perror("/dev/audio");
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Con_Printf("Sound driver does not understand GETPROPS\n");
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close(audio_fd);
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return 0;
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}
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if (!(caps & AUDIO_PROP_MMAP))
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{
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Con_Printf("Sorry but your soundcard doesn't support mmap\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 = 16;
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shm->speed = 11025;
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s = getenv("QUAKE_SOUND_CHANNELS");
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if (s) shm->channels = atoi(s);
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else if ((i = COM_CheckParm("-sndmono")) != 0)
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shm->channels = 1;
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else if ((i = COM_CheckParm("-sndstereo")) != 0)
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shm->channels = 2;
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else shm->channels = 2;
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AUDIO_INITINFO(&info);
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info.play.precision = shm->samplebits;
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info.play.sample_rate = 11025;
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info.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
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info.play.channels = shm->channels;
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if (ioctl(audio_fd, AUDIO_SETINFO, &info) == -1) {
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Con_Printf("Bad encoding size\n");
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close(audio_fd);
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return 0;
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}
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ioctl(audio_fd, AUDIO_GETINFO, &info);
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shm->speed = info.play.sample_rate;
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shm->samples = info.play.buffer_size / (shm->samplebits/8);
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shm->submission_chunk = 1;
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// memory map the dma buffer
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// XXX This is absurd but dma does not work if not mmapped read/write.
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shm->buffer = (unsigned char *) mmap(NULL, info.play.buffer_size,
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PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0);
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// if (!shm->buffer || shm->buffer == (unsigned char *)-1)
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if (shm->buffer == MAP_FAILED)
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{
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perror("/dev/audio");
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Con_Printf("Could not mmap /dev/audio\n");
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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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int SNDDMA_GetDMAPos(void)
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{
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audio_offset_t count;
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if (!snd_inited) return 0;
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if (ioctl(audio_fd, AUDIO_GETOOFFS, &count)==-1)
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{
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perror("/dev/audio");
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Con_Printf("Uh, sound dead.\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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// 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.offset / (shm->samplebits / 8);
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return shm->samplepos;
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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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{
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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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}
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