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/*
* Schism Tracker - a cross-platform Impulse Tracker clone
* copyright (c) 2003-2005 Storlek <storlek@rigelseven.com>
* copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org>
* copyright (c) 2009 Storlek & Mrs. Brisby
* copyright (c) 2010-2012 Storlek
* URL: http://schismtracker.org/
*
* 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 the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Here be demons. */
#include "headers.h"
#include "util.h"
#include "osdefs.h"
#if defined(USE_DLTRICK_ALSA)
# include <dlfcn.h>
void *_dltrick_handle = NULL;
static void *_alsaless_sdl_hack = NULL;
#else
# error You are in a maze of twisty little passages, all alike.
#endif
/* --------------------------------------------------------------------- */
void alsa_dlinit(void)
{
/* okay, this is how this works:
* to operate the alsa mixer and alsa midi, we need functions in
* libasound.so.2 -- if we can do that, *AND* libSDL has the
* ALSA_bootstrap routine- then SDL was built with alsa-support-
* which means schism can probably use ALSA - so we set that as the
* default here.
*/
_dltrick_handle = dlopen("libasound.so.2", RTLD_NOW);
if (!_dltrick_handle)
_dltrick_handle = dlopen("libasound.so", RTLD_NOW);
if (!getenv("SDL_AUDIODRIVER")) {
_alsaless_sdl_hack = dlopen("libSDL-1.2.so.0", RTLD_NOW);
if (!_alsaless_sdl_hack)
_alsaless_sdl_hack = RTLD_DEFAULT;
#if 0
if (_dltrick_handle && _alsaless_sdl_hack
&& (dlsym(_alsaless_sdl_hack, "ALSA_bootstrap")
|| dlsym(_alsaless_sdl_hack, "snd_pcm_open"))) {
static int (*alsa_snd_pcm_open)(void **pcm,
const char *name,
int stream,
int mode);
static int (*alsa_snd_pcm_close)(void *pcm);
alsa_snd_pcm_open = dlsym(_dltrick_handle, "snd_pcm_open");
alsa_snd_pcm_close = dlsym(_dltrick_handle, "snd_pcm_close");
}
#endif
}
}
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