Aegisub/aegisub/libmedia/common/video_manager.cpp

130 lines
4.3 KiB
C++

// 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 Project http://www.aegisub.org/
//
// $Id$
/// @file video_provider_manager.cpp
/// @brief Keep track of installed video providers
/// @ingroup video_input
///
#include "config.h"
#ifndef MAGI_PRE
#include <string>
#endif
#include <libaegisub/log.h>
#include "libmedia/video.h"
#ifdef WITH_AVISYNTH
#include "../video/avs_video.h"
#endif
#include "../cache/video_cache.h"
//XXX: needs fixing. #include "../video/dummy_video.h"
#ifdef WITH_FFMPEGSOURCE
#include "../video/ffms_video.h"
#endif
//XXX: needs fixing. #include "../video/yuv4mpeg.h"
namespace media {
/// @brief Get provider
/// @param video
/// @return
///
VideoProvider *VideoProviderFactory::GetProvider(std::string video) {
//XXX std::vector<std::string> list = GetClasses(OPT_GET("Video/Provider")->GetString());
std::vector<std::string> list = GetClasses("ffmpegsource");
if (video.find("?dummy") == 0) list.insert(list.begin(), "Dummy");
list.insert(list.begin(), "YUV4MPEG");
bool fileFound = false;
bool fileSupported = false;
std::string errors;
errors.reserve(1024);
for (int i = 0; i < (signed)list.size(); ++i) {
std::string err;
try {
VideoProvider *provider = Create(list[i], video);
LOG_I("manager/video/provider") << list[i] << ": opened " << video;
if (provider->WantsCaching()) {
return new VideoProviderCache(provider);
}
return provider;
}
catch (agi::FileNotFoundError const&) {
err = list[i] + ": file not found.";
// Keep trying other providers as this one may just not be able to
// open a valid path
}
catch (VideoNotSupported const&) {
fileFound = true;
err = list[i] + ": video is not in a supported format.";
}
catch (VideoOpenError const& ex) {
fileSupported = true;
err = list[i] + ": " + ex.GetMessage();
}
catch (agi::vfr::Error const& ex) {
fileSupported = true;
err = list[i] + ": " + ex.GetMessage();
}
errors += err;
errors += "\n";
LOG_D("manager/video/provider") << err;
}
// No provider could open the file
LOG_E("manager/video/provider") << "Could not open " << video;
std::string msg = "Could not open " + video + ":\n" + errors;
if (!fileFound) throw agi::FileNotFoundError(video);
if (!fileSupported) throw VideoNotSupported(msg);
throw VideoOpenError(msg);
}
/// @brief Register all providers
///
void VideoProviderFactory::RegisterProviders() {
#ifdef WITH_AVISYNTH
Register<AvisynthVideoProvider>("Avisynth");
#endif
#ifdef WITH_FFMPEGSOURCE
Register<ffms::FFmpegSourceVideoProvider>("FFmpegSource");
#endif
//XXX Register<DummyVideoProvider>("Dummy", true);
//XXX Register<YUV4MPEGVideoProvider>("YUV4MPEG", true);
}
template<> VideoProviderFactory::map *FactoryBase<VideoProvider *(*)(std::string)>::classes = NULL;
} // namespace media