/* 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 #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 #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include #include #include #include #include #include #include #include "QF/cmd.h" #include "QF/cvar.h" #include "QF/qargs.h" #include "QF/sys.h" #include "snd_internal.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 int tryrates[] = { 44100, 48000, 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 int try_open (snd_t *snd, int rw) { int caps, fmt, rc, tmp, i; int retries = 3; int omode = O_WRONLY; int mmmode = PROT_WRITE; int mmflags = MAP_FILE; 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; if (rw) { omode = O_RDWR; mmmode |= PROT_READ; mmflags |= MAP_SHARED; } omode |= O_NONBLOCK; audio_fd = open (snd_dev, omode); 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, omode); } if (audio_fd < 0) { Sys_Printf ("Could not open %s: %s\n", snd_dev, strerror (errno)); return 0; } } if ((rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0)) < 0) { Sys_Printf ("Could not reset %s: %s\n", snd_dev, strerror (errno)); close (audio_fd); return 0; } if (ioctl (audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) { Sys_Printf ("Sound driver too old: %s\n", strerror (errno)); 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; } // set sample bits & speed snd->samplebits = snd_bits->int_val; if (snd->samplebits != 16 && snd->samplebits != 8) { ioctl (audio_fd, SNDCTL_DSP_GETFMTS, &fmt); if (fmt & AFMT_S16_LE) { // little-endian 16-bit signed snd->samplebits = 16; } else { if (fmt & AFMT_U8) { // unsigned 8-bit ulaw snd->samplebits = 8; } } } if (snd->samplebits == 16) { rc = AFMT_S16_LE; rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc); if (rc < 0) { Sys_Printf ("Could not support 16-bit data. Try 8-bit. %s\n", strerror (errno)); close (audio_fd); return 0; } } else if (snd->samplebits == 8) { rc = AFMT_U8; rc = ioctl (audio_fd, SNDCTL_DSP_SETFMT, &rc); if (rc < 0) { Sys_Printf ("Could not support 8-bit data. %s\n", strerror (errno)); close (audio_fd); return 0; } } else { Sys_Printf ("%d-bit sound not supported. %s", snd->samplebits, strerror (errno)); close (audio_fd); return 0; } tmp = snd->channels; rc = ioctl (audio_fd, SNDCTL_DSP_CHANNELS, &tmp); if (rc < 0) { Sys_Printf ("Could not set %s to stereo=%d: %s\n", snd_dev, snd->channels, strerror (errno)); close (audio_fd); return 0; } if (snd_rate->int_val) { snd->speed = snd_rate->int_val; } else { for (i = 0; i < ((int) sizeof (tryrates) / 4); i++) if (!ioctl (audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break; snd->speed = tryrates[i]; } if (!snd_stereo->int_val) { snd->channels = 1; } else { snd->channels = 2; } rc = ioctl (audio_fd, SNDCTL_DSP_SPEED, &snd->speed); if (rc < 0) { Sys_Printf ("Could not set %s speed to %d: %s\n", snd_dev, snd->speed, strerror (errno)); close (audio_fd); return 0; } if (ioctl (audio_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) { Sys_Printf ("Um, can't do GETOSPACE?: %s\n", strerror (errno)); close (audio_fd); return 0; } snd->frames = info.fragstotal * info.fragsize; snd->frames /= snd->channels * snd->samplebits / 8; snd->submission_chunk = 1; if (mmaped_io) { // memory map the dma buffer unsigned long sz = sysconf (_SC_PAGESIZE); unsigned long len = info.fragstotal * info.fragsize; len = (len + sz - 1) & ~(sz - 1); snd->buffer = (byte *) mmap (NULL, len, mmmode, mmflags, audio_fd, 0); if (snd->buffer == MAP_FAILED) { Sys_MaskPrintf (SYS_snd, "Could not mmap %s: %s\n", snd_dev, strerror (errno)); close (audio_fd); return 0; } } else { snd->buffer = malloc (snd->frames * snd->channels * (snd->samplebits / 8)); if (!snd->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) { Sys_Printf ("Could not toggle.: %s\n", strerror (errno)); if (mmaped_io) munmap (snd->buffer, snd->frames * snd->channels * snd->samplebits / 8); close (audio_fd); return 0; } tmp = PCM_ENABLE_OUTPUT; rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); if (rc < 0) { Sys_Printf ("Could not toggle.: %s\n", strerror (errno)); if (mmaped_io) munmap (snd->buffer, snd->frames * snd->channels * snd->samplebits / 8); close (audio_fd); return 0; } snd->framepos = 0; snd_inited = 1; return 1; } static int SNDDMA_Init (snd_t *snd) { return try_open (snd, 0) || try_open (snd, 1); } static int SNDDMA_GetDMAPos (snd_t *snd) { struct count_info count; if (!snd_inited) return 0; if (ioctl (audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) { Sys_Printf ("Uh, %s dead: %s\n", snd_dev, strerror (errno)); if (mmaped_io) munmap (snd->buffer, snd->frames * snd->channels * snd->samplebits / 8); close (audio_fd); snd_inited = 0; return 0; } snd->framepos = count.ptr / (snd->channels * snd->samplebits / 8); return snd->framepos; } static void SNDDMA_shutdown (snd_t *snd) { if (snd_inited) { if (mmaped_io) munmap (snd->buffer, snd->frames * snd->channels * snd->samplebits / 8); close (audio_fd); snd_inited = 0; } } static int sample_bytes (snd_t *snd, int frames) { return frames * snd->channels * snd->samplebits / 8; } /* SNDDMA_Submit Send sound to device if buffer isn't really the dma buffer */ static void SNDDMA_Submit (snd_t *snd) { int frames; int len; int offset; if (snd_inited && !mmaped_io) { frames = *plugin_info_snd_output_data.paintedtime - *plugin_info_snd_output_data.soundtime; offset = frames * snd->channels * snd->samplebits / 8; if (snd->framepos + frames <= snd->frames) { len = sample_bytes (snd, frames); if (write (audio_fd, snd->buffer + offset, len) != len) Sys_Printf ("SNDDMA_Submit(): %s\n", strerror (errno)); } else { int len = sample_bytes (snd, snd->frames - snd->framepos); if (write (audio_fd, snd->buffer + offset, len) != len) Sys_Printf ("SNDDMA_Submit(): %s\n", strerror (errno)); if (write (audio_fd, snd->buffer, offset - len) != offset - len) Sys_Printf ("SNDDMA_Submit(): %s\n", strerror (errno)); } *plugin_info_snd_output_data.soundtime += frames; } } static void SNDDMA_BlockSound (snd_t *snd) { } static void SNDDMA_UnblockSound (snd_t *snd) { } PLUGIN_INFO(snd_output, oss) { 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.init = SNDDMA_Init_Cvars; plugin_info_general_funcs.shutdown = NULL; plugin_info_snd_output_funcs.init = SNDDMA_Init; plugin_info_snd_output_funcs.shutdown = SNDDMA_shutdown; plugin_info_snd_output_funcs.get_dma_pos = SNDDMA_GetDMAPos; plugin_info_snd_output_funcs.submit = SNDDMA_Submit; plugin_info_snd_output_funcs.block_sound = SNDDMA_BlockSound; plugin_info_snd_output_funcs.unblock_sound = SNDDMA_UnblockSound; return &plugin_info; }