forked from mia/Aegisub
129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
// Copyright (c) 2005, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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/// @file avisynth_wrap.cpp
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/// @brief Wrapper-layer for Avisynth
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/// @ingroup video_input audio_input
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///
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#ifdef WITH_AVISYNTH
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#include "avisynth_wrap.h"
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#include "avisynth.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 AVISYNTH_SO "avisynth.dll"
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#else
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#define AVISYNTH_SO "libavisynth.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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int avs_refcount = 0;
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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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IScriptEnvironment *env = nullptr;
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std::mutex AviSynthMutex;
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}
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// This needs to be visible so Avisynth sees it
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const AVS_Linkage *AVS_linkage = nullptr;
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typedef IScriptEnvironment* __stdcall FUNC(int);
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AviSynthWrapper::AviSynthWrapper() {
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if (!avs_refcount){
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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(AVISYNTH_SO));
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#undef _Lstr
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#undef CONCATENATE
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#else
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hLib = dlopen(AVISYNTH_SO, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
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#endif
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if (!hLib)
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throw AvisynthError("Could not load " AVISYNTH_SO);
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#ifdef _WIN32
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FUNC* CreateScriptEnv = (FUNC*)GetProcAddress(hLib, "CreateScriptEnvironment");
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#else
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FUNC* CreateScriptEnv = (FUNC*)dlsym(hLib, "CreateScriptEnvironment");
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#endif
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if (!CreateScriptEnv)
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throw AvisynthError("Failed to get address of CreateScriptEnv from " AVISYNTH_SO);
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env = CreateScriptEnv(AVISYNTH_INTERFACE_VERSION);
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if (!env)
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throw AvisynthError("Failed to create a new avisynth script environment. Avisynth is too old?");
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avs_refcount++;
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AVS_linkage = env->GetAVSLinkage();
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// Set memory limit
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const int memoryMax = OPT_GET("Provider/Avisynth/Memory Max")->GetInt();
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if (memoryMax)
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env->SetMemoryMax(memoryMax);
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}
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}
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AviSynthWrapper::~AviSynthWrapper() {
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if (!--avs_refcount) {
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env->DeleteScriptEnvironment();
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#ifdef _WIN32
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FreeLibrary(hLib);
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#else
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dlclose(hLib);
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#endif
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AVS_linkage = nullptr;
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}
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}
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std::mutex& AviSynthWrapper::GetMutex() const {
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return AviSynthMutex;
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}
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IScriptEnvironment *AviSynthWrapper::GetEnv() const {
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return env;
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}
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#endif
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