Aegisub/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/
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//
// $Id$
/// @file avisynth_wrap.cpp
/// @brief Wrapper-layer for Avisynth
/// @ingroup video_input audio_input
///
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////////////
// Includes
#include "config.h"
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#ifdef WITH_AVISYNTH
#include "avisynth_wrap.h"
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#include "options.h"
#ifdef DEBUG_AVISYNTH_CODE
#include "main.h"
#include <wx/textfile.h>
/// DOCME
wxTextFile avs_trace_file;
/// @brief DOCME
/// @param s
///
void DoAvsTrace(const wxString &s)
{
if (!avs_trace_file.IsOpened()) {
if (!avs_trace_file.Open(AegisubApp::folderName + _T("avstrace.txt"))) {
avs_trace_file.Create(AegisubApp::folderName + _T("avstrace.txt"));
}
avs_trace_file.AddLine(_T(""));
avs_trace_file.AddLine(_T("======= NEW SESSION ======="));
}
avs_trace_file.AddLine(s);
avs_trace_file.Write();
}
#endif
// Allocate storage for and initialise static members
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int AviSynthWrapper::avs_refcount = 0;
HINSTANCE AviSynthWrapper::hLib = NULL;
IScriptEnvironment *AviSynthWrapper::env = NULL;
wxMutex AviSynthWrapper::AviSynthMutex;
/// @brief AviSynth constructor
///
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AviSynthWrapper::AviSynthWrapper() {
if (!avs_refcount) {
AVSTRACE(_T("Avisynth not loaded, trying to load it now..."));
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hLib=LoadLibrary(_T("avisynth.dll"));
if (hLib == NULL) {
AVSTRACE(_T("Avisynth loading failed"));
throw wxString(_T("Could not load avisynth.dll"));
}
AVSTRACE(_T("Avisynth loading successful"));
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FUNC *CreateScriptEnv = (FUNC*)GetProcAddress(hLib, "CreateScriptEnvironment");
if (CreateScriptEnv == NULL) {
AVSTRACE(_T("Failed to get address of CreateScriptEnv"));
throw wxString(_T("Failed to get function from avisynth.dll"));
}
AVSTRACE(_T("Got address of CreateScriptEnv"));
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// Require Avisynth 2.5.6+?
if (Options.AsBool(_T("Allow Ancient Avisynth")))
env = CreateScriptEnv(AVISYNTH_INTERFACE_VERSION-1);
else
env = CreateScriptEnv(AVISYNTH_INTERFACE_VERSION);
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if (env == NULL) {
AVSTRACE(_T("Failed to create script environment"));
throw wxString(_T("Failed to create a new avisynth script environment. Avisynth is too old?"));
}
AVSTRACE(_T("Created script environment"));
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// Set memory limit
int memoryMax = Options.AsInt(_T("Avisynth MemoryMax"));
if (memoryMax != 0) {
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env->SetMemoryMax(memoryMax);
AVSTRACE(_T("Set Avisynth memory limit"));
}
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}
avs_refcount++;
AVSTRACE(_T("Increased reference count"));
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}
/// @brief AviSynth destructor
///
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AviSynthWrapper::~AviSynthWrapper() {
AVSTRACE(_T("Decreasing reference count"));
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if (!--avs_refcount) {
AVSTRACE(_T("Reference count reached zero, deleting environment"));
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delete env;
AVSTRACE(_T("Environment deleted"));
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FreeLibrary(hLib);
AVSTRACE(_T("Free'd library, unloading complete"));
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}
}
/// @brief Get environment
///
IScriptEnvironment *AviSynthWrapper::GetEnv() {
return env;
}
#endif