Aegisub/aegisub/src/video_provider_manager.cpp

// 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
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file video_provider_manager.cpp
/// @brief Keep track of installed video providers
/// @ingroup video_input
///

#include "config.h"

#include <libaegisub/log.h>

#include "compat.h"
#include "main.h"

#ifdef WITH_AVISYNTH
#include "video_provider_avs.h"
#endif
#include "video_provider_cache.h"
#include "video_provider_dummy.h"
#ifdef WITH_FFMPEGSOURCE
#include "video_provider_ffmpegsource.h"
#endif
#include "video_provider_manager.h"
#include "video_provider_yuv4mpeg.h"


/// @brief Get provider 
/// @param video 
/// @return 
///
VideoProvider *VideoProviderFactory::GetProvider(wxString video) {
	// First check special case of dummy video
	if (video.StartsWith(_T("?dummy:"))) {
		return new DummyVideoProvider(video.wc_str());
	}

	try {
		VideoProvider *y4m_provider = new YUV4MPEGVideoProvider(video);
		if (y4m_provider)
			y4m_provider = new VideoProviderCache(y4m_provider);
		return y4m_provider;
	}
	catch (wxString temp) {
		LOG_E("manager/video/provider/yuv4mpeg") << "Provider creation failed with reason: "<< temp.c_str() << " trying other providers";
	}
	catch (...) {
		LOG_E("manager/video/provider/yuv4mpeg") << "Provider creation failed (unknown reason) trying other providers";
	}

	// List of providers
	std::vector<std::string> list = GetClasses(OPT_GET("Video/Provider")->GetString());
	if (video.StartsWith("?dummy")) list.insert(list.begin(), "Dummy");
	list.insert(list.begin(), "YUV4MPEG");

	// None available
	if (list.empty()) throw _T("No video providers are available.");

	// Get provider
	wxString error;
	for (unsigned int i=0;i<list.size();i++) {
		try {
			// Create provider
			VideoProvider *provider = Create(list[i], video);
			if (provider) {
				// Cache if necessary
				if (provider->WantsCaching()) {
					provider = new VideoProviderCache(provider);
				}
				return provider;
			}
		}
		catch (wxString err) { error += list[i] + _T(" factory: ") + err + _T("\n"); }
		catch (const wxChar *err) { error += list[i] + _T(" factory: ") + wxString(err) + _T("\n"); }
		catch (...) { error += list[i] + _T(" factory: Unknown error\n"); }
	}

	// Failed
	throw error;
}

/// @brief Register all providers 
///
void VideoProviderFactory::RegisterProviders() {
#ifdef WITH_AVISYNTH
	Register<AvisynthVideoProvider>("Avisynth");
#endif
#ifdef WITH_FFMPEGSOURCE
	Register<FFmpegSourceVideoProvider>("FFmpegSource");
#endif
	Register<DummyVideoProvider>("Dummy", true);
	Register<YUV4MPEGVideoProvider>("YUV4MPEG", true);
}

/// DOCME
template<> VideoProviderFactory::map *FactoryBase<VideoProvider *(*)(wxString)>::classes = NULL;