Aegisub/core/video_provider.cpp

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// Copyright (c) 2006, 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include "video_provider_avs.h"
#include "video_provider_lavc.h"
#include "video_provider_dshow.h"
#include "options.h"
////////////////
// Get provider
VideoProvider *VideoProvider::GetProvider(wxString video,wxString subtitles) {
// Check if avisynth is available
bool avisynthAvailable = false;
bool dshowAvailable = false;
#ifdef __WINDOWS__
dshowAvailable = true;
try {
// If avisynth.dll cannot be loaded, an exception will be thrown and avisynthAvailable will never be set to true
AviSynthWrapper avs;
avisynthAvailable = true;
}
catch (...) {}
#endif
// Initialize to null
VideoProvider *provider = NULL;
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// Preffered provider
wxString preffered = Options.AsText(_T("Video provider")).Lower();
// See if it's OK to use LAVC
#ifdef USE_LAVC
if (preffered == _T("ffmpeg") || (!avisynthAvailable && !dshowAvailable)) {
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// Load
bool success = false;
wxString error;
try {
provider = new LAVCVideoProvider(video,subtitles);
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success = true;
}
// Catch error
catch (const wchar_t *err) {
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error = err;
}
catch (...) {
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error = _T("Unhandled exception.");
}
if (!success) {
// Delete old provider
delete provider;
provider = NULL;
// Try to fallback to avisynth
if (avisynthAvailable) {
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wxMessageBox(_T("Failed loading FFmpeg decoder for video, falling back to Avisynth.\nError message: ") + error,_T("FFmpeg error."));
provider = NULL;
}
// Out of options, rethrow
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else throw error.c_str();
}
}
#endif
#ifdef __WINDOWS__
#ifdef USE_DIRECTSHOW
// Use DirectShow provider
if (!provider && (preffered == _T("dshow") || !avisynthAvailable)) {
try {
provider = new DirectShowVideoProvider(video,subtitles);
}
catch (...) {
delete provider;
provider = NULL;
throw;
}
}
#endif
// Use Avisynth provider
if (!provider) {
try {
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provider = new AvisynthVideoProvider(video,subtitles);
}
catch (...) {
delete provider;
provider = NULL;
throw;
}
}
#endif
// Return provider
return provider;
}