mirror of
https://github.com/mpv-player/mpv
synced 2024-11-14 22:48:35 +01:00
48a7c4be3a
We want to avoid causing problems if libmpv is used in an application that links cuda, or if the libav* libraries are linked with cuda, as might happen if the scale_npp filter is used.
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cuda_dynamic.h"
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#include <pthread.h>
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#if defined(_WIN32)
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# include <windows.h>
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# define dlopen(filename, flags) LoadLibrary(TEXT(filename))
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# define dlsym(handle, symbol) (void *)GetProcAddress(handle, symbol)
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# define dlclose(handle) FreeLibrary(handle)
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#else
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# include <dlfcn.h>
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#endif
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#if defined(_WIN32) || defined(__CYGWIN__)
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# define CUDA_LIBNAME "nvcuda.dll"
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#else
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# define CUDA_LIBNAME "libcuda.so.1"
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#endif
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#define CUDA_DECL(NAME, TYPE) \
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TYPE *mpv_ ## NAME;
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CUDA_FNS(CUDA_DECL)
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static bool cuda_loaded = false;
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static pthread_once_t cuda_load_once = PTHREAD_ONCE_INIT;
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static void cuda_do_load(void)
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{
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void *lib = dlopen(CUDA_LIBNAME, RTLD_LAZY);
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if (!lib) {
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return;
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}
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#define CUDA_LOAD_SYMBOL(NAME, TYPE) \
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mpv_ ## NAME = dlsym(lib, #NAME); if (!mpv_ ## NAME) return;
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CUDA_FNS(CUDA_LOAD_SYMBOL)
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cuda_loaded = true;
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}
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bool cuda_load(void)
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{
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pthread_once(&cuda_load_once, cuda_do_load);
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return cuda_loaded;
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}
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