/* snd_sun.c (description) Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 1999,2000 contributors of the QuakeForge project Please see the file "AUTHORS" for a list of contributors 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__ ((used)) const char rcsid[] = "$Id$"; #ifdef HAVE_UNISTD_H # include #endif #include #include #include #include #include #include #include #include #include #include #include "QF/plugin.h" #include "QF/qargs.h" #include "QF/qtypes.h" #include "QF/sys.h" #include "snd_internal.h" static int audio_fd; static int snd_inited; static int snd_blocked = 0; static int wbufp; static audio_info_t info; #define BUFFER_SIZE 8192 static unsigned char dma_buffer[BUFFER_SIZE]; static volatile dma_t sn; 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_sound_data; static snd_output_funcs_t plugin_info_sound_funcs; static void SNDDMA_Init_Cvars (void) { } static volatile dma_t * SNDDMA_Init (void) { if (snd_inited) { Sys_Printf ("Sound already init'd\n"); return 0; } audio_fd = open ("/dev/audio", O_WRONLY | O_NDELAY); if (audio_fd < 0) { if (errno == EBUSY) { Sys_Printf ("Audio device is being used by another process\n"); } perror ("/dev/audio"); Sys_Printf ("Could not open /dev/audio\n"); return (0); } if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) { perror ("/dev/audio"); Sys_Printf ("Could not communicate with audio device.\n"); close (audio_fd); return 0; } // set to nonblock if (fcntl (audio_fd, F_SETFL, O_NONBLOCK) < 0) { perror ("/dev/audio"); close (audio_fd); return 0; } AUDIO_INITINFO (&info); sn.speed = 11025; // try 16 bit stereo info.play.encoding = AUDIO_ENCODING_LINEAR; info.play.sample_rate = 11025; info.play.channels = 2; info.play.precision = 16; if (ioctl (audio_fd, AUDIO_SETINFO, &info) < 0) { info.play.encoding = AUDIO_ENCODING_LINEAR; info.play.sample_rate = 11025; info.play.channels = 1; info.play.precision = 16; if (ioctl (audio_fd, AUDIO_SETINFO, &info) < 0) { Sys_Printf ("Incapable sound hardware.\n"); close (audio_fd); return 0; } Sys_Printf ("16 bit mono sound initialized\n"); sn.samplebits = 16; sn.channels = 1; } else { // 16 bit stereo Sys_Printf ("16 bit stereo sound initialized\n"); sn.samplebits = 16; sn.channels = 2; } sn.samples = sizeof (dma_buffer) / (sn.samplebits / 8); sn.samplepos = 0; sn.submission_chunk = 1; sn.buffer = (unsigned char *) dma_buffer; snd_inited = 1; return &sn; } static int SNDDMA_GetDMAPos (void) { if (!snd_inited) return (0); if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) { perror ("/dev/audio"); Sys_Printf ("Could not communicate with audio device.\n"); close (audio_fd); snd_inited = 0; return (0); } return ((info.play.samples * sn.channels) % sn.samples); } static int SNDDMA_GetSamples (void) { if (!snd_inited) return (0); if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) { perror ("/dev/audio"); Sys_Printf ("Could not communicate with audio device.\n"); close (audio_fd); snd_inited = 0; return (0); } return info.play.samples; } static 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 */ static void SNDDMA_Submit (void) { unsigned char *p; static unsigned char writebuf[1024]; int bsize, bytes, idx, b; int stop = *plugin_info_sound_data.paintedtime; if (snd_blocked) return; if (*plugin_info_sound_data.paintedtime < wbufp) wbufp = 0; // reset bsize = sn.channels * (sn.samplebits / 8); bytes = (*plugin_info_sound_data.paintedtime - wbufp) * bsize; if (!bytes) return; if (bytes > sizeof (writebuf)) { bytes = sizeof (writebuf); stop = wbufp + bytes / bsize; } p = writebuf; idx = (wbufp * bsize) & (BUFFER_SIZE - 1); for (b = bytes; b; b--) { *p++ = dma_buffer[idx]; idx = (idx + 1) & (BUFFER_SIZE - 1); } wbufp = stop; if (write (audio_fd, writebuf, bytes) < bytes) Sys_Printf ("audio can't keep up!\n"); } static void SNDDMA_BlockSound (void) { ++snd_blocked; } static void SNDDMA_UnblockSound (void) { if (!snd_blocked) return; --snd_blocked; } PLUGIN_INFO(snd_output, sun) { plugin_info.type = qfp_snd_output; plugin_info.api_version = QFPLUGIN_VERSION; plugin_info.plugin_version = "0.1"; plugin_info.description = "SUN 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_sound_data; plugin_info_funcs.general = &plugin_info_general_funcs; plugin_info_funcs.input = NULL; plugin_info_funcs.snd_output = &plugin_info_sound_funcs; plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars; plugin_info_general_funcs.p_Shutdown = NULL; plugin_info_sound_funcs.pS_O_Init = SNDDMA_Init; plugin_info_sound_funcs.pS_O_Shutdown = SNDDMA_Shutdown; plugin_info_sound_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos; plugin_info_sound_funcs.pS_O_Submit = SNDDMA_Submit; plugin_info_sound_funcs.pS_O_BlockSound = SNDDMA_BlockSound; plugin_info_sound_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound; return &plugin_info; }