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- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- Sam Lantinga
- slouken@devolution.com
- */
-
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_audiodev.c,v 1.1.2.3 2001/02/10 22:10:17 hercules Exp $";
- #endif
-
- /* Get the name of the audio device we use for output */
-
- #if defined(unix) || defined(__unix__)
-
- #include <stdlib.h>
- #include <stdio.h>
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <string.h>
-
- #include "SDL_audiodev_c.h"
-
- #ifndef _PATH_DEV_DSP
- #define _PATH_DEV_DSP "/dev/dsp"
- #endif
- #ifndef _PATH_DEV_DSP24
- #define _PATH_DEV_DSP24 "/dev/sound/dsp"
- #endif
- #ifndef _PATH_DEV_AUDIO
- #define _PATH_DEV_AUDIO "/dev/audio"
- #endif
-
-
- int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic)
- {
- const char *audiodev;
- int audio_fd;
- char audiopath[1024];
-
- /* Figure out what our audio device is */
- if ( ((audiodev=getenv("SDL_PATH_DSP")) == NULL) &&
- ((audiodev=getenv("AUDIODEV")) == NULL) ) {
- if ( classic ) {
- audiodev = _PATH_DEV_AUDIO;
- } else {
- struct stat sb;
-
- /* Added support for /dev/sound/\* in Linux 2.4 */
- if ( (stat("/dev/sound", &sb) == 0) &&
- S_ISDIR(sb.st_mode) ) {
- audiodev = _PATH_DEV_DSP24;
- } else {
- audiodev = _PATH_DEV_DSP;
- }
- }
- }
- audio_fd = open(audiodev, flags, 0);
-
- /* If the first open fails, look for other devices */
- if ( (audio_fd < 0) && (strlen(audiodev) < (sizeof(audiopath)-3)) ) {
- int exists, instance;
- struct stat sb;
-
- instance = 1;
- do { /* Don't use errno ENOENT - it may not be thread-safe */
- sprintf(audiopath, "%s%d", audiodev, instance++);
- exists = 0;
- if ( stat(audiopath, &sb) == 0 ) {
- exists = 1;
- audio_fd = open(audiopath, flags, 0);
- }
- } while ( exists && (audio_fd < 0) );
- audiodev = audiopath;
- }
- if ( path != NULL ) {
- strncpy(path, audiodev, maxlen);
- path[maxlen-1] = '\0';
- }
- return(audio_fd);
- }
-
- #elif defined(_AIX)
-
- /* Get the name of the audio device we use for output */
-
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <string.h>
-
- #include "SDL_audiodev_c.h"
-
- #ifndef _PATH_DEV_DSP
- #define _PATH_DEV_DSP "/dev/%caud%c/%c"
- #endif
-
- char devsettings[][3] =
- {
- { 'p', '0', '1' }, { 'p', '0', '2' }, { 'p', '0', '3' }, { 'p', '0', '4' },
- { 'p', '1', '1' }, { 'p', '1', '2' }, { 'p', '1', '3' }, { 'p', '1', '4' },
- { 'p', '2', '1' }, { 'p', '2', '2' }, { 'p', '2', '3' }, { 'p', '2', '4' },
- { 'p', '3', '1' }, { 'p', '3', '2' }, { 'p', '3', '3' }, { 'p', '3', '4' },
- { 'b', '0', '1' }, { 'b', '0', '2' }, { 'b', '0', '3' }, { 'b', '0', '4' },
- { 'b', '1', '1' }, { 'b', '1', '2' }, { 'b', '1', '3' }, { 'b', '1', '4' },
- { 'b', '2', '1' }, { 'b', '2', '2' }, { 'b', '2', '3' }, { 'b', '2', '4' },
- { 'b', '3', '1' }, { 'b', '3', '2' }, { 'b', '3', '3' }, { 'b', '3', '4' },
- { '\0', '\0', '\0' }
- };
-
- static int OpenUserDefinedDevice(char *path, int maxlen, int flags)
- {
- const char *audiodev;
- int audio_fd;
-
- /* Figure out what our audio device is */
- if ((audiodev=getenv("SDL_PATH_DSP")) == NULL) {
- audiodev=getenv("AUDIODEV");
- }
- if ( audiodev == NULL ) {
- return -1;
- }
- audio_fd = open(audiodev, flags, 0);
- if ( path != NULL ) {
- strncpy(path, audiodev, maxlen);
- path[maxlen-1] = '\0';
- }
- return audio_fd;
- }
-
- int SDL_OpenAudioPath(char *path, int maxlen, int flags, int classic)
- {
- struct stat sb;
- int audio_fd;
- char audiopath[1024];
- int cycle;
-
- audio_fd = OpenUserDefinedDevice(path,maxlen,flags);
- if ( audio_fd != -1 ) {
- return audio_fd;
- }
-
- cycle = 0;
- while( devsettings[cycle][0] != '\0' ) {
- sprintf( audiopath,
- _PATH_DEV_DSP,
- devsettings[cycle][0],
- devsettings[cycle][1],
- devsettings[cycle][2]);
-
- if ( stat(audiopath, &sb) == 0 ) {
- audio_fd = open(audiopath, flags, 0);
- if ( audio_fd > 0 ) {
- if ( path != NULL ) {
- strncpy( path, audiopath, maxlen );
- path[maxlen-1] = '\0';
- }
- return audio_fd;
- }
- }
- }
- return -1;
- }
-
- #endif /* UNIX system */
-