mirror of
https://git.code.sf.net/p/quake/quake2forge
synced 2024-12-13 22:21:34 +00:00
301 lines
6.4 KiB
C
301 lines
6.4 KiB
C
/*
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Copyright (C) 1997-2001 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 <linux/soundcard.h>
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#include <stdio.h>
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#include "../client/client.h"
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#include "../client/snd_loc.h"
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int audio_fd = -1;
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int snd_inited;
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cvar_t *sndbits;
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cvar_t *sndspeed;
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cvar_t *sndchannels;
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cvar_t *snddevice;
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static int tryrates[] = { 11025, 22051, 44100, 48000, 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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struct audio_buf_info info;
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int caps;
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extern uid_t saved_euid;
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if (snd_inited)
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return 1;
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snd_inited = 0;
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if (!snddevice)
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{
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sndbits = Cvar_Get("sndbits", "16", CVAR_ARCHIVE);
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sndspeed = Cvar_Get("sndspeed", "0", CVAR_ARCHIVE);
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sndchannels = Cvar_Get("sndchannels", "2", CVAR_ARCHIVE);
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snddevice = Cvar_Get("snddevice", "/dev/dsp", CVAR_ARCHIVE);
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}
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// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
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if (audio_fd == -1)
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{
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seteuid(saved_euid);
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audio_fd = open(snddevice->string, O_RDWR);
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if (audio_fd == -1)
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{
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perror(snddevice->string);
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seteuid(getuid());
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Com_Printf("SNDDMA_Init: Could not open %s.\n", snddevice->string);
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return 0;
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}
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seteuid(getuid());
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}
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rc = ioctl(audio_fd, SNDCTL_DSP_RESET, 0);
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if (rc == -1)
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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not reset %s.\n", snddevice->string);
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close(audio_fd);
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audio_fd = -1;
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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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Sound driver too old.\n");
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close(audio_fd);
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audio_fd = -1;
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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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{
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Com_Printf("SNDDMA_Init: Sorry, but your soundcard doesn't support trigger or mmap. (%08x)\n", caps);
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close(audio_fd);
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audio_fd = -1;
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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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{
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perror("GETOSPACE");
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Com_Printf("SNDDMA_Init: GETOSPACE ioctl failed.\n");
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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// set sample bits & speed
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dma.samplebits = (int)sndbits->value;
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if (dma.samplebits != 16 && dma.samplebits != 8)
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{
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ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
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if (fmt & AFMT_S16_LE) dma.samplebits = 16;
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else if (fmt & AFMT_U8) dma.samplebits = 8;
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}
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dma.speed = (int)sndspeed->value;
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if (!dma.speed)
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{
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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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dma.speed = tryrates[i];
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}
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dma.channels = (int)sndchannels->value;
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if (dma.channels < 1 || dma.channels > 2)
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dma.channels = 2;
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dma.samples = info.fragstotal * info.fragsize / (dma.samplebits/8);
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dma.submission_chunk = 1;
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// memory map the dma buffer
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if (!dma.buffer)
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dma.buffer = (unsigned char *) mmap(NULL, info.fragstotal
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* info.fragsize, PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0);
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if (!dma.buffer || dma.buffer == MAP_FAILED)
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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not mmap %s.\n", snddevice->string);
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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tmp = 0;
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if (dma.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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not set %s to stereo=%d.", snddevice->string, dma.channels);
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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if (tmp)
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dma.channels = 2;
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else
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dma.channels = 1;
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if (dma.samplebits == 16)
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{
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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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not support 16-bit data. Try 8-bit.\n");
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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}
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else if (dma.samplebits == 8)
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{
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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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not support 8-bit data.\n");
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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}
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else
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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: %d-bit sound not supported.", dma.samplebits);
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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rc = ioctl(audio_fd, SNDCTL_DSP_SPEED, &dma.speed);
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if (rc < 0)
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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not set %s speed to %d.", snddevice->string, dma.speed);
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close(audio_fd);
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audio_fd = -1;
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return 0;
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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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not toggle. (1)\n");
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close(audio_fd);
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audio_fd = -1;
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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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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_Init: Could not toggle. (2)\n");
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close(audio_fd);
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audio_fd = -1;
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return 0;
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}
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dma.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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struct count_info count;
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if (!snd_inited) return 0;
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if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &count)==-1)
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{
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perror(snddevice->string);
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Com_Printf("SNDDMA_GetDMAPos: GETOPTR failed.\n");
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close(audio_fd);
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audio_fd = -1;
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snd_inited = 0;
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return 0;
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}
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// dma.samplepos = (count.bytes / (dma.samplebits / 8)) & (dma.samples-1);
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// fprintf(stderr, "%d \r", count.ptr);
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dma.samplepos = count.ptr / (dma.samplebits / 8);
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return dma.samplepos;
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}
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void SNDDMA_Shutdown(void)
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{
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#if 0
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if (snd_inited)
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{
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close(audio_fd);
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audio_fd = -1;
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snd_inited = 0;
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}
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#endif
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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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void SNDDMA_BeginPainting (void)
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{
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}
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