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24c86b5501
since the window system doesn't do it for us like other platforms. This prevents sticky keys and missed keys when going in and out of focus, for example Alt would appear to stick if switching away from an SDL app with Alt-Tab and had to be pressed again. CR: Sam
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.h"
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/* Get the name of the audio device we use for output */
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#if SDL_AUDIO_DRIVER_BSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h> /* For close() */
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#include "SDL_stdinc.h"
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#include "SDL_audiodev_c.h"
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#ifndef _PATH_DEV_DSP
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#if defined(__NETBSD__) || defined(__OPENBSD__)
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#define _PATH_DEV_DSP "/dev/audio"
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#else
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#define _PATH_DEV_DSP "/dev/dsp"
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#endif
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#endif
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#ifndef _PATH_DEV_DSP24
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#define _PATH_DEV_DSP24 "/dev/sound/dsp"
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#endif
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#ifndef _PATH_DEV_AUDIO
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#define _PATH_DEV_AUDIO "/dev/audio"
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#endif
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static SDL_INLINE void
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test_device(const char *fname, int flags, int (*test) (int fd),
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SDL_AddAudioDevice addfn)
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{
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struct stat sb;
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if ((stat(fname, &sb) == 0) && (S_ISCHR(sb.st_mode))) {
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const int audio_fd = open(fname, flags, 0);
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if (audio_fd >= 0) {
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if (test(audio_fd)) {
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addfn(fname);
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}
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close(audio_fd);
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}
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}
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}
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static int
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test_stub(int fd)
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{
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return 1;
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}
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void
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SDL_EnumUnixAudioDevices(int iscapture, int classic, int (*test)(int fd),
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SDL_AddAudioDevice addfn)
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{
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const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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const char *audiodev;
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char audiopath[1024];
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if (test == NULL)
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test = test_stub;
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/* Figure out what our audio device is */
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if (((audiodev = SDL_getenv("SDL_PATH_DSP")) == NULL) &&
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((audiodev = SDL_getenv("AUDIODEV")) == NULL)) {
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if (classic) {
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audiodev = _PATH_DEV_AUDIO;
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} else {
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struct stat sb;
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/* Added support for /dev/sound/\* in Linux 2.4 */
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if (((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode))
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&& ((stat(_PATH_DEV_DSP24, &sb) == 0)
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&& S_ISCHR(sb.st_mode))) {
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audiodev = _PATH_DEV_DSP24;
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} else {
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audiodev = _PATH_DEV_DSP;
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}
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}
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}
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test_device(audiodev, flags, test, addfn);
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if (SDL_strlen(audiodev) < (sizeof(audiopath) - 3)) {
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int instance = 0;
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while (instance++ <= 64) {
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SDL_snprintf(audiopath, SDL_arraysize(audiopath),
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"%s%d", audiodev, instance);
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test_device(audiopath, flags, test, addfn);
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}
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}
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}
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#endif /* Audio driver selection */
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/* vi: set ts=4 sw=4 expandtab: */
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