/* snd_oss.c OSS sound output plugin. 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 */ #ifdef HAVE_CONFIG_H # include "config.h" #endif static __attribute__ ((unused)) const char rcsid[] = "$Id$"; #ifdef HAVE_SYS_TYPES_H # include #endif #ifdef HAVE_SYS_IOCTL_H # include #endif #ifdef HAVE_SYS_MMAN_H # include #endif #ifdef HAVE_SYS_PARAM_H # include #endif #ifdef HAVE_SYS_SOUNDCARD_H # include #elif defined HAVE_LINUX_SOUNDCARD_H # include #elif HAVE_MACHINE_SOUNDCARD_H # include #endif #include #include #include #include #include #include #include #include #include "QF/cmd.h" #include "QF/cvar.h" #include "QF/plugin.h" #include "QF/qargs.h" #include "QF/sound.h" #include "QF/sys.h" #ifndef MAP_FAILED # define MAP_FAILED ((void *) -1) #endif static int audio_fd; static int snd_inited; static int mmaped_io = 0; static const char *snd_dev = "/dev/dsp"; static volatile dma_t sn; static int tryrates[] = { 11025, 22050, 22051, 44100, 8000 }; static cvar_t *snd_stereo; static cvar_t *snd_rate; static cvar_t *snd_device; static cvar_t *snd_bits; static cvar_t *snd_oss_mmaped; static plugin_t plugin_info; static plugin_data_t plugin_info_data; static plugin_funcs_t plugin_info_funcs; static general_data_t plugin_info_general_data; static general_funcs_t plugin_info_general_funcs; static snd_output_data_t plugin_info_snd_output_data; static snd_output_funcs_t plugin_info_snd_output_funcs; static void SNDDMA_Init_Cvars (void) { snd_stereo = Cvar_Get ("snd_stereo", "1", CVAR_ROM, NULL, "sound stereo output"); snd_rate = Cvar_Get ("snd_rate", "0", CVAR_ROM, NULL, "sound playback rate. 0 is system default"); snd_device = Cvar_Get ("snd_device", "", CVAR_ROM, NULL, "sound device. \"\" is system default"); snd_bits = Cvar_Get ("snd_bits", "0", CVAR_ROM, NULL, "sound sample depth. 0 is system default"); snd_oss_mmaped = Cvar_Get ("snd_oss_mmaped", "1", CVAR_ROM, NULL, "mmaped io"); } static qboolean SNDDMA_Init (void) { int caps, fmt, rc, tmp, i; int retries = 3; struct audio_buf_info info; snd_inited = 0; mmaped_io = snd_oss_mmaped->int_val; // open snd_dev, confirm capability to mmap, and get size of dma buffer if (snd_device->string[0]) snd_dev = snd_device->string; audio_fd = open (snd_dev, 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 (snd_dev, O_RDWR); } if (audio_fd < 0) { perror (snd_dev); Sys_Printf ("Could not open %s\n", snd_dev); return 0; } } if ((rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0)) < 0) { perror (snd_dev); Sys_Printf ("Could not reset %s\n", snd_dev); close (audio_fd); return 0; } if (ioctl (audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) { perror (snd_dev); Sys_Printf ("Sound driver too old\n"); close (audio_fd); return 0; } if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) { Sys_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"); Sys_Printf ("Um, can't do GETOSPACE?\n"); close (audio_fd); return 0; } shm = &sn; shm->splitbuffer = 0; // set sample bits & speed shm->samplebits = snd_bits->int_val; 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 (snd_rate->int_val) { shm->speed = snd_rate->int_val; } else { for (i = 0; i < (sizeof (tryrates) / 4); i++) if (!ioctl (audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break; shm->speed = tryrates[i]; } if (!snd_stereo->int_val) { shm->channels = 1; } else { shm->channels = 2; } shm->samples = info.fragstotal * info.fragsize / (shm->samplebits / 8); shm->submission_chunk = 1; tmp = 0; if (shm->channels == 2) tmp = 1; rc = ioctl (audio_fd, SNDCTL_DSP_STEREO, &tmp); if (rc < 0) { perror (snd_dev); Sys_Printf ("Could not set %s to stereo=%d", snd_dev, 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 (snd_dev); Sys_Printf ("Could not set %s speed to %d", snd_dev, 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 (snd_dev); Sys_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 (snd_dev); Sys_Printf ("Could not support 8-bit data.\n"); close (audio_fd); return 0; } } else { perror (snd_dev); Sys_Printf ("%d-bit sound not supported.", shm->samplebits); close (audio_fd); return 0; } if (mmaped_io) { // memory map the dma buffer shm->buffer = (unsigned char *) mmap (NULL, info.fragstotal * info.fragsize, #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) // workaround for BSD OSS quirk PROT_READ | PROT_WRITE, #else PROT_WRITE, #endif MAP_FILE | MAP_SHARED, audio_fd, 0); if (shm->buffer == MAP_FAILED) { perror (snd_dev); Sys_Printf ("Could not mmap %s\n", snd_dev); close (audio_fd); return 0; } } else { shm->buffer = malloc (shm->samples * (shm->samplebits / 8) * 2); if (!shm->buffer) { Sys_Printf ("SNDDMA_Init: memory allocation failure\n"); 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 (snd_dev); Sys_Printf ("Could not toggle.\n"); if (mmaped_io) munmap (shm->buffer, shm->samples * shm->samplebits / 8); close (audio_fd); return 0; } tmp = PCM_ENABLE_OUTPUT; rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); if (rc < 0) { perror (snd_dev); Sys_Printf ("Could not toggle.\n"); if (mmaped_io) munmap (shm->buffer, shm->samples * shm->samplebits / 8); close (audio_fd); return 0; } shm->samplepos = 0; snd_inited = 1; return 1; } static int SNDDMA_GetDMAPos (void) { struct count_info count; if (!snd_inited) return 0; if (ioctl (audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) { perror (snd_dev); Sys_Printf ("Uh, sound dead.\n"); if (mmaped_io) munmap (shm->buffer, shm->samples * shm->samplebits / 8); 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; } static void SNDDMA_Shutdown (void) { if (snd_inited) { if (mmaped_io) munmap (shm->buffer, shm->samples * shm->samplebits / 8); close (audio_fd); snd_inited = 0; } } #define BITSIZE (shm->samplebits / 8) #define BYTES (samples / BITSIZE) /* SNDDMA_Submit Send sound to device if buffer isn't really the dma buffer */ static void SNDDMA_Submit (void) { int samples; if (snd_inited && !mmaped_io) { samples = *plugin_info_snd_output_data.paintedtime - *plugin_info_snd_output_data.soundtime; if (shm->samplepos + BYTES <= shm->samples) write (audio_fd, shm->buffer + BYTES, samples); else { write (audio_fd, shm->buffer + BYTES, shm->samples - shm->samplepos); write (audio_fd, shm->buffer, BYTES - (shm->samples - shm->samplepos)); } *plugin_info_snd_output_data.soundtime += samples; } } static void SNDDMA_BlockSound (void) { } static void SNDDMA_UnblockSound (void) { } QFPLUGIN plugin_t *PLUGIN_INFO(snd_output, oss) (void); QFPLUGIN plugin_t * PLUGIN_INFO(snd_output, oss) (void) { plugin_info.type = qfp_snd_output; plugin_info.api_version = QFPLUGIN_VERSION; plugin_info.plugin_version = "0.1"; plugin_info.description = "OSS digital output"; plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n" "Copyright (C) 1999,2000,2001 contributors of the QuakeForge " "project\n" "Please see the file \"AUTHORS\" for a list of contributors"; plugin_info.functions = &plugin_info_funcs; plugin_info.data = &plugin_info_data; plugin_info_data.general = &plugin_info_general_data; plugin_info_data.input = NULL; plugin_info_data.snd_output = &plugin_info_snd_output_data; plugin_info_funcs.general = &plugin_info_general_funcs; plugin_info_funcs.input = NULL; plugin_info_funcs.snd_output = &plugin_info_snd_output_funcs; plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars; plugin_info_general_funcs.p_Shutdown = NULL; plugin_info_snd_output_funcs.pS_O_Init = SNDDMA_Init; plugin_info_snd_output_funcs.pS_O_Shutdown = SNDDMA_Shutdown; plugin_info_snd_output_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos; plugin_info_snd_output_funcs.pS_O_Submit = SNDDMA_Submit; plugin_info_snd_output_funcs.pS_O_BlockSound = SNDDMA_BlockSound; plugin_info_snd_output_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound; return &plugin_info; }