diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/audio/SDL_audiodev.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/audio/SDL_audiodev.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/audio/SDL_audiodev.c b/distrib/sdl-1.2.15/src/audio/SDL_audiodev.c new file mode 100644 index 0000000..396156c --- /dev/null +++ b/distrib/sdl-1.2.15/src/audio/SDL_audiodev.c @@ -0,0 +1,179 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +/* Get the name of the audio device we use for output */ + +#if SDL_AUDIO_DRIVER_BSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO + +#include <fcntl.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "SDL_stdinc.h" +#include "SDL_audiodev_c.h" + +#ifndef _PATH_DEV_DSP +#if defined(__NETBSD__) || defined(__OPENBSD__) +#define _PATH_DEV_DSP "/dev/audio" +#else +#define _PATH_DEV_DSP "/dev/dsp" +#endif +#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=SDL_getenv("SDL_PATH_DSP")) == NULL) && + ((audiodev=SDL_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)) && + ((stat(_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(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) && (SDL_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 */ + SDL_snprintf(audiopath, SDL_arraysize(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 ) { + SDL_strlcpy(path, audiodev, maxlen); + path[maxlen-1] = '\0'; + } + return(audio_fd); +} + +#elif SDL_AUDIO_DRIVER_PAUD + +/* Get the name of the audio device we use for output */ + +#include <sys/types.h> +#include <sys/stat.h> + +#include "SDL_stdinc.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=SDL_getenv("SDL_PATH_DSP")) == NULL) { + audiodev=SDL_getenv("AUDIODEV"); + } + if ( audiodev == NULL ) { + return -1; + } + audio_fd = open(audiodev, flags, 0); + if ( path != NULL ) { + SDL_strlcpy(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' ) { + SDL_snprintf( audiopath, SDL_arraysize(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 ) { + SDL_strlcpy( path, audiopath, maxlen ); + } + return audio_fd; + } + } + } + return -1; +} + +#endif /* Audio driver selection */ |