mirror of
https://bitbucket.org/CPMADevs/cnq3
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294 lines
7.1 KiB
C
294 lines
7.1 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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 Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#if !USE_SDL_SOUND
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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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#ifdef __linux__ // rb0101023 - guard this
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#include <linux/soundcard.h>
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#endif
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#ifdef __FreeBSD__ // rb0101023 - added
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#include <sys/soundcard.h>
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#endif
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#include <stdio.h>
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#include "../qcommon/q_shared.h"
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#include "../client/snd_local.h"
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int audio_fd;
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int snd_inited=0;
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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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/* Some devices may work only with 48000 */
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static int tryrates[] = { 22050, 11025, 44100, 48000, 8000 };
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static qboolean use_custom_memset = qfalse;
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// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=371
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void Snd_Memset (void* dest, const int val, const size_t count)
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{
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int *pDest;
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int i, iterate;
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if (!use_custom_memset)
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{
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Com_Memset(dest,val,count);
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return;
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}
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iterate = count / sizeof(int);
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pDest = (int*)dest;
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for(i=0; i<iterate; i++)
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{
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pDest[i] = val;
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}
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}
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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; // bk001204 - unused
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struct audio_buf_info info;
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int caps;
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if (snd_inited)
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return 1;
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if (!snddevice) {
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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) {
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audio_fd = open(snddevice->string, O_RDWR);
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if (audio_fd < 0) {
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perror(snddevice->string);
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Com_Printf("Could not open %s\n", snddevice->string);
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return 0;
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}
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}
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if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) {
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perror(snddevice->string);
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Com_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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Com_Printf("Sorry but your soundcard can't do this\n");
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close(audio_fd);
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return 0;
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}
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/* SNDCTL_DSP_GETOSPACE moved to be called later */
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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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ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
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if (fmt & AFMT_S16_LE)
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dma.samplebits = 16;
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else if (fmt & AFMT_U8)
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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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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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/* mmap() call moved forward */
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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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perror(snddevice->string);
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Com_Printf("Could not set %s to stereo=%d", snddevice->string, dma.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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dma.channels = 2;
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else
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dma.channels = 1;
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rc = ioctl(audio_fd, SNDCTL_DSP_SPEED, &dma.speed);
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if (rc < 0) {
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perror(snddevice->string);
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Com_Printf("Could not set %s speed to %d", snddevice->string, dma.speed);
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close(audio_fd);
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return 0;
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}
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if (dma.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(snddevice->string);
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Com_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 (dma.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(snddevice->string);
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Com_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(snddevice->string);
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Com_Printf("%d-bit sound not supported.", dma.samplebits);
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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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Com_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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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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// TTimo 2001/10/08 added PROT_READ to the mmap
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// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=371
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// checking Alsa bug, doesn't allow dma alloc with PROT_READ?
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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|PROT_READ, MAP_FILE|MAP_SHARED, audio_fd, 0);
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if (dma.buffer == MAP_FAILED)
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{
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Com_Printf("Could not mmap dma buffer PROT_WRITE|PROT_READ\n");
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Com_Printf("trying mmap PROT_WRITE (with associated better compatibility / less performance code)\n");
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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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// NOTE TTimo could add a variable to force using regular memset on systems that are known to be safe
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use_custom_memset = qtrue;
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}
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if (dma.buffer == MAP_FAILED) {
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perror(snddevice->string);
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Com_Printf("Could not mmap %s\n", snddevice->string);
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close(audio_fd);
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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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perror(snddevice->string);
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Com_Printf("Could not toggle.\n");
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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(snddevice->string);
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Com_Printf("Could not toggle.\n");
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close(audio_fd);
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return 0;
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}
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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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perror(snddevice->string);
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Com_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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return count.ptr / (dma.samplebits / 8);
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}
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void SNDDMA_Shutdown(void)
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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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void SNDDMA_BeginPainting (void)
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{
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}
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#endif // !USE_SDL_SOUND
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