60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
#include "global.h"
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#include <dlfcn.h>
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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#include <alsa/asoundlib.h>
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static void *Handle = NULL;
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#include "RageUtil.h"
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#include "ALSA9Dynamic.h"
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/* foo_f dfoo = NULL */
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#define FUNC(ret, name, proto) name##_f d##name = NULL
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#include "ALSA9Functions.h"
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#undef FUNC
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static const CString lib = "libasound.so.2";
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CString LoadALSA()
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{
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ASSERT( Handle == NULL );
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Handle = dlopen( lib, RTLD_NOW );
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if( Handle == NULL )
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return ssprintf("dlopen(%s): %s", lib.c_str(), dlerror());
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CString error;
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/* Eww. The "new" HW and SW API functions are really prefixed by __,
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* eg. __snd_pcm_hw_params_set_rate_near. */
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#define FUNC(ret, name, proto) \
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d##name = (name##_f) dlsym(Handle, "__" #name); \
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if( !d##name ) { \
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d##name = (name##_f) dlsym(Handle, #name); \
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if( !d##name ) { \
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error="Couldn't load symbol " #name; \
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goto error; \
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} \
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}
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#include "ALSA9Functions.h"
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#undef FUNC
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return "";
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error:
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UnloadALSA();
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if( Handle )
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dlclose( Handle );
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Handle = NULL;
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return error;
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}
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void UnloadALSA()
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{
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dlclose( Handle );
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#define FUNC(ret, name, proto) d##name = NULL;
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#include "ALSA9Functions.h"
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#undef FUNC
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}
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