/* snd_oss.c (description) Copyright (C) 1996-1997 Id Software, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #ifdef HAVE_SYS_IOCTL_H # include #endif #ifdef HAVE_SYS_MMAN_H # include #endif #if defined HAVE_SYS_SOUNDCARD_H # include #elif defined HAVE_LINUX_SOUNDCARD_H # include #elif HAVE_MACHINE_SOUNDCARD_H # include #endif #include "console.h" #include "qargs.h" #include "sound.h" #include "cmd.h" #ifndef MAP_FAILED # define MAP_FAILED ((void *) -1) #endif int audio_fd; int snd_inited; static int tryrates[] = { 11025, 22051, 44100, 8000 }; qboolean SNDDMA_Init (void) { int rc; int fmt; int tmp; int i; char *s; struct audio_buf_info info; int caps; int retries = 3; snd_inited = 0; // open /dev/dsp, confirm capability to mmap, and get size of dma buffer audio_fd = open ("/dev/dsp", O_RDWR); if (audio_fd < 0) { // Failed open, retry up to 3 times // if it's busy while ((audio_fd < 0) && retries-- && ((errno == EAGAIN) || (errno == EBUSY))) { sleep (1); audio_fd = open ("/dev/dsp", O_RDWR); } if (audio_fd < 0) { perror ("/dev/dsp"); Con_Printf ("Could not open /dev/dsp\n"); return 0; } } if ((rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0)) < 0) { perror ("/dev/dsp"); Con_Printf ("Could not reset /dev/dsp\n"); close (audio_fd); return 0; } if (ioctl (audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) { perror ("/dev/dsp"); Con_Printf ("Sound driver too old\n"); close (audio_fd); return 0; } if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) { Con_Printf ("Sound device can't do memory-mapped I/O.\n"); close (audio_fd); return 0; } if (ioctl (audio_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) { perror ("GETOSPACE"); Con_Printf ("Um, can't do GETOSPACE?\n"); close (audio_fd); return 0; } shm = &sn; shm->splitbuffer = 0; // set sample bits & speed if ((i = COM_CheckParm ("-sndbits"))) { shm->samplebits = atoi (com_argv[i + 1]); } else { if ((s = getenv ("QF_SND_BITS"))) { shm->samplebits = atoi (s); } } if (shm->samplebits != 16 && shm->samplebits != 8) { ioctl (audio_fd, SNDCTL_DSP_GETFMTS, &fmt); if (fmt & AFMT_S16_LE) { // little-endian 16-bit signed shm->samplebits = 16; } else { if (fmt & AFMT_U8) { // unsigned 8-bit ulaw shm->samplebits = 8; } } } if ((i = COM_CheckParm ("-sndspeed"))) { shm->speed = atoi (com_argv[i + 1]); } else if ((s = getenv ("QF_SND_SPEED"))) { shm->speed = atoi (s); } else { for (i = 0; i < (sizeof (tryrates) / 4); i++) if (!ioctl (audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break; shm->speed = tryrates[i]; } if ((i = COM_CheckParm ("-sndmono"))) { shm->channels = 1; } else if ((i = COM_CheckParm ("-sndstereo"))) { shm->channels = 2; } else if ((s = getenv ("QF_SND_CHANNELS"))) { shm->channels = atoi (s); } else { shm->channels = 2; } shm->samples = info.fragstotal * info.fragsize / (shm->samplebits / 8); shm->submission_chunk = 1; // memory map the dma buffer shm->buffer = (unsigned char *) mmap (NULL, info.fragstotal * info.fragsize, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, audio_fd, 0); if (shm->buffer == MAP_FAILED) { perror ("/dev/dsp"); Con_Printf ("Could not mmap /dev/dsp\n"); close (audio_fd); return 0; } tmp = 0; if (shm->channels == 2) tmp = 1; rc = ioctl (audio_fd, SNDCTL_DSP_STEREO, &tmp); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not set /dev/dsp to stereo=%d", shm->channels); close (audio_fd); return 0; } if (tmp) shm->channels = 2; else shm->channels = 1; rc = ioctl (audio_fd, SNDCTL_DSP_SPEED, &shm->speed); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not set /dev/dsp speed to %d", shm->speed); close (audio_fd); return 0; } if (shm->samplebits == 16) { rc = AFMT_S16_LE; rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not support 16-bit data. Try 8-bit.\n"); close (audio_fd); return 0; } } else if (shm->samplebits == 8) { rc = AFMT_U8; rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not support 8-bit data.\n"); close (audio_fd); return 0; } } else { perror ("/dev/dsp"); Con_Printf ("%d-bit sound not supported.", shm->samplebits); close (audio_fd); return 0; } // toggle the trigger & start her up tmp = 0; rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not toggle.\n"); close (audio_fd); return 0; } tmp = PCM_ENABLE_OUTPUT; rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); if (rc < 0) { perror ("/dev/dsp"); Con_Printf ("Could not toggle.\n"); close (audio_fd); return 0; } shm->samplepos = 0; snd_inited = 1; return 1; } int SNDDMA_GetDMAPos (void) { struct count_info count; if (!snd_inited) return 0; if (ioctl (audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) { perror ("/dev/dsp"); Con_Printf ("Uh, sound dead.\n"); close (audio_fd); snd_inited = 0; return 0; } // shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1); // fprintf(stderr, "%d \r", count.ptr); shm->samplepos = count.ptr / (shm->samplebits / 8); return shm->samplepos; } void SNDDMA_Shutdown (void) { if (snd_inited) { close (audio_fd); snd_inited = 0; } } /* ============== SNDDMA_Submit Send sound to device if buffer isn't really the dma buffer =============== */ void SNDDMA_Submit (void) { }