Aegisub/src/avisynth_wrap.cpp

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// Copyright (c) 2005, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
/// @file avisynth_wrap.cpp
/// @brief Wrapper-layer for Avisynth
/// @ingroup video_input audio_input
///
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#ifdef WITH_AVISYNTH
#include "avisynth_wrap.h"
#include "avisynth.h"
#include "options.h"
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#include <mutex>
// Allocate storage for and initialise static members
namespace {
int avs_refcount = 0;
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HINSTANCE hLib = nullptr;
IScriptEnvironment *env = nullptr;
std::mutex AviSynthMutex;
}
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typedef IScriptEnvironment* __stdcall FUNC(int);
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AviSynthWrapper::AviSynthWrapper() {
if (!avs_refcount++) {
hLib = LoadLibrary(L"avisynth.dll");
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if (!hLib)
throw AvisynthError("Could not load avisynth.dll");
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FUNC *CreateScriptEnv = (FUNC*)GetProcAddress(hLib, "CreateScriptEnvironment");
if (!CreateScriptEnv)
throw AvisynthError("Failed to get address of CreateScriptEnv from avisynth.dll");
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// Require Avisynth 2.5.6+?
if (OPT_GET("Provider/Avisynth/Allow Ancient")->GetBool())
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env = CreateScriptEnv(AVISYNTH_INTERFACE_VERSION-1);
else
env = CreateScriptEnv(AVISYNTH_INTERFACE_VERSION);
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if (!env)
throw AvisynthError("Failed to create a new avisynth script environment. Avisynth is too old?");
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// Set memory limit
const int memoryMax = OPT_GET("Provider/Avisynth/Memory Max")->GetInt();
if (memoryMax)
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env->SetMemoryMax(memoryMax);
}
}
AviSynthWrapper::~AviSynthWrapper() {
if (!--avs_refcount) {
delete env;
FreeLibrary(hLib);
}
}
std::mutex& AviSynthWrapper::GetMutex() const {
return AviSynthMutex;
}
IScriptEnvironment *AviSynthWrapper::GetEnv() const {
return env;
}
#endif