forked from mia/Aegisub
112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
// Copyright (c) 2022, arch1t3cht <arch1t3cht@gmail.com>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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/// @file vapoursynth_wrap.cpp
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/// @brief Wrapper-layer for VapourSynth
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/// @ingroup video_input audio_input
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///
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#ifdef WITH_VAPOURSYNTH
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#include "vapoursynth_wrap.h"
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#include "VSScript4.h"
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#include "options.h"
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#include <mutex>
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#ifndef _WIN32
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#include <dlfcn.h>
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#endif
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#ifdef _WIN32
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#define VSSCRIPT_SO "vsscript.dll"
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#else
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#define VSSCRIPT_SO "libvapoursynth-script.so"
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#endif
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// Allocate storage for and initialise static members
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namespace {
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bool vs_loaded = false;
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#ifdef _WIN32
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HINSTANCE hLib = nullptr;
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#else
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void* hLib = nullptr;
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#endif
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const VSAPI *api = nullptr;
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VSSCRIPTAPI *scriptapi = nullptr;
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std::mutex VapourSynthMutex;
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}
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typedef VSSCRIPTAPI* VS_CC FUNC(int);
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VapourSynthWrapper::VapourSynthWrapper() {
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// VSScript assumes it's only loaded once, so unlike AVS we can't unload it when the refcount reaches zero
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if (!vs_loaded) {
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#ifdef _WIN32
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#define CONCATENATE(x, y) x ## y
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#define _Lstr(x) CONCATENATE(L, x)
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hLib = LoadLibraryW(_Lstr(VSSCRIPT_SO));
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#undef _Lstr
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#undef CONCATENATE
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#else
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hLib = dlopen(VSSCRIPT_SO, RTLD_LAZY | RTLD_GLOBAL | RTLD_DEEPBIND);
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#endif
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if (!hLib)
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throw VapourSynthError("Could not load " VSSCRIPT_SO);
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#ifdef _WIN32
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FUNC* getVSScriptAPI = (FUNC*)GetProcAddress(hLib, "getVSScriptAPI");
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#else
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FUNC* getVSScriptAPI = (FUNC*)dlsym(hLib, "getVSScriptAPI");
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#endif
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if (!getVSScriptAPI)
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throw VapourSynthError("Failed to get address of getVSScriptAPI from " VSSCRIPT_SO);
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// Python will set the program's locale to the user's default locale, which will break
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// half of wxwidgets on some operating systems due to locale mismatches. There's not really anything
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// we can do to fix it except for saving it and setting it back to its original value afterwards.
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std::string oldlocale(setlocale(LC_ALL, NULL));
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scriptapi = getVSScriptAPI(VSSCRIPT_API_VERSION);
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setlocale(LC_ALL, oldlocale.c_str());
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if (!scriptapi)
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throw VapourSynthError("Failed to get VapourSynth ScriptAPI");
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api = scriptapi->getVSAPI(VAPOURSYNTH_API_VERSION);
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if (!api)
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throw VapourSynthError("Failed to get VapourSynth API");
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vs_loaded = true;
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}
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}
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std::mutex& VapourSynthWrapper::GetMutex() const {
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return VapourSynthMutex;
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}
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const VSAPI *VapourSynthWrapper::GetAPI() const {
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return api;
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}
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const VSSCRIPTAPI *VapourSynthWrapper::GetScriptAPI() const {
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return scriptapi;
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}
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#endif
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