Convert VideoProviderManager to AudioProviderManager's new design

build/Aegisub/Aegisub.vcxproj

@@ -243,12 +243,8 @@
     <ClInclude Include="$(SrcDir)video_display.h" />
     <ClInclude Include="$(SrcDir)video_frame.h" />
     <ClInclude Include="$(SrcDir)video_out_gl.h" />
-    <ClInclude Include="$(SrcDir)video_provider_avs.h" />
-    <ClInclude Include="$(SrcDir)video_provider_cache.h" />
     <ClInclude Include="$(SrcDir)video_provider_dummy.h" />
-    <ClInclude Include="$(SrcDir)video_provider_ffmpegsource.h" />
     <ClInclude Include="$(SrcDir)video_provider_manager.h" />
-    <ClInclude Include="$(SrcDir)video_provider_yuv4mpeg.h" />
     <ClInclude Include="$(SrcDir)video_slider.h" />
     <ClInclude Include="$(SrcDir)visual_feature.h" />
     <ClInclude Include="$(SrcDir)visual_tool.h" />

build/Aegisub/Aegisub.vcxproj.filters

@@ -390,21 +390,9 @@
     <ClInclude Include="$(SrcDir)video_out_gl.h">
       <Filter>Video\UI</Filter>
     </ClInclude>
-    <ClInclude Include="$(SrcDir)video_provider_avs.h">
-      <Filter>Video\Providers</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SrcDir)video_provider_yuv4mpeg.h">
-      <Filter>Video\Providers</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SrcDir)video_provider_cache.h">
-      <Filter>Video\Providers</Filter>
-    </ClInclude>
     <ClInclude Include="$(SrcDir)video_provider_dummy.h">
       <Filter>Video\Providers</Filter>
     </ClInclude>
-    <ClInclude Include="$(SrcDir)video_provider_ffmpegsource.h">
-      <Filter>Video\Providers</Filter>
-    </ClInclude>
     <ClInclude Include="$(SrcDir)video_provider_manager.h">
       <Filter>Video\Providers</Filter>
     </ClInclude>

src/dialog_video_details.cpp

@@ -39,8 +39,8 @@
 #include "ass_time.h"
 #include "compat.h"
 #include "include/aegisub/context.h"
+#include "include/aegisub/video_provider.h"
 #include "video_context.h"
-#include "video_provider_manager.h"
 
 #include <boost/rational.hpp>
 

src/frame_main.cpp

@@ -44,6 +44,7 @@
 #include "include/aegisub/menu.h"
 #include "include/aegisub/toolbar.h"
 #include "include/aegisub/hotkey.h"
+#include "include/aegisub/video_provider.h"
 
 #include "ass_file.h"
 #include "audio_controller.h"
@@ -69,7 +70,6 @@
 #include "video_box.h"
 #include "video_context.h"
 #include "video_display.h"
-#include "video_provider_manager.h"
 #include "video_slider.h"
 
 #include <boost/algorithm/string/predicate.hpp>

src/plugin_manager.cpp

@@ -38,13 +38,11 @@
 #include "include/aegisub/spellchecker.h"
 #include "include/aegisub/subtitles_provider.h"
 #include "plugin_manager.h"
-#include "video_provider_manager.h"
 #include "auto4_lua_factory.h"
 
 #include <libaegisub/util.h>
 
 void RegisterBuiltInPlugins() {
-	VideoProviderFactory::RegisterProviders();
 	AudioPlayerFactory::RegisterProviders();
 	SubtitlesProviderFactory::RegisterProviders();
 	SpellCheckerFactory::RegisterProviders();

src/threaded_frame_source.cpp

@@ -25,6 +25,7 @@
 #include "ass_file.h"
 #include "export_fixstyle.h"
 #include "include/aegisub/subtitles_provider.h"
+#include "include/aegisub/video_provider.h"
 #include "video_frame.h"
 #include "video_provider_manager.h"
 

src/video_provider_avs.cpp

@@ -35,7 +35,7 @@
 #include "config.h"
 
 #ifdef WITH_AVISYNTH
-#include "video_provider_avs.h"
+#include "include/aegisub/video_provider.h"
 
 #include "options.h"
 #include "video_frame.h"
@@ -45,6 +45,7 @@
 #include <libaegisub/fs.h>
 #include <libaegisub/log.h>
 #include <libaegisub/path.h>
+#include <libaegisub/util.h>
 
 #include <boost/algorithm/string/predicate.hpp>
 #include <mutex>
@@ -53,8 +54,42 @@
 #include <vfw.h>
 #endif
 
-AvisynthVideoProvider::AvisynthVideoProvider(agi::fs::path const& filename, std::string const& colormatrix)
+#define VideoFrame AVSVideoFrame
-{
+#include "avisynth.h"
+#undef VideoFrame
+#include "avisynth_wrap.h"
+
+namespace {
+class AvisynthVideoProvider: public VideoProvider {
+	AviSynthWrapper avs;
+	std::string decoder_name;
+	agi::vfr::Framerate fps;
+	std::vector<int> keyframes;
+	std::string warning;
+	std::string colorspace;
+
+	PClip RGB32Video;
+	VideoInfo vi;
+
+	AVSValue Open(agi::fs::path const& filename);
+
+public:
+	AvisynthVideoProvider(agi::fs::path const& filename, std::string const& colormatrix);
+
+	std::shared_ptr<VideoFrame> GetFrame(int n);
+
+	int GetFrameCount() const override { return vi.num_frames; }
+	agi::vfr::Framerate GetFPS() const override { return fps; }
+	int GetWidth() const override { return vi.width; }
+	int GetHeight() const override { return vi.height; }
+	double GetDAR() const override { return 0; }
+	std::vector<int> GetKeyFrames() const override { return keyframes; }
+	std::string GetWarning() const override { return warning; }
+	std::string GetDecoderName() const override { return decoder_name; }
+	std::string GetColorSpace() const override { return colorspace; }
+};
+
+AvisynthVideoProvider::AvisynthVideoProvider(agi::fs::path const& filename, std::string const& colormatrix) {
 	agi::acs::CheckFileRead(filename);
 
 	std::lock_guard<std::mutex> lock(avs.GetMutex());
@@ -273,4 +308,9 @@ std::shared_ptr<VideoFrame> AvisynthVideoProvider::GetFrame(int n) {
 	auto frame = RGB32Video->GetFrame(n, avs.GetEnv());
 	return std::make_shared<VideoFrame>(frame->GetReadPtr(), frame->GetRowSize() / 4, frame->GetHeight(), frame->GetPitch(), true);
 }
+}
+
+std::unique_ptr<VideoProvider> CreateAvisynthVideoProvider(agi::fs::path const& path, std::string const& colormatrix) {
+	return agi::util::make_unique<AvisynthVideoProvider>(path, colormatrix);
+}
 #endif // HAVE_AVISYNTH

src/video_provider_avs.h

@@ -1,71 +0,0 @@
-// Copyright (c) 2006, Fredrik Mellbin
-// 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 video_provider_avs.h
-/// @see video_provider_avs.cpp
-/// @ingroup video_input
-///
-
-#ifdef WITH_AVISYNTH
-#include "include/aegisub/video_provider.h"
-
-#define VideoFrame AVSVideoFrame
-#include "avisynth.h"
-#undef VideoFrame
-#include "avisynth_wrap.h"
-
-class AvisynthVideoProvider: public VideoProvider {
-	AviSynthWrapper avs;
-	std::string decoder_name;
-	agi::vfr::Framerate fps;
-	std::vector<int> keyframes;
-	std::string warning;
-	std::string colorspace;
-
-	PClip RGB32Video;
-	VideoInfo vi;
-
-	AVSValue Open(agi::fs::path const& filename);
-
-public:
-	AvisynthVideoProvider(agi::fs::path const& filename, std::string const& colormatrix);
-
-	std::shared_ptr<VideoFrame> GetFrame(int n);
-
-	int GetFrameCount() const { return vi.num_frames; }
-	agi::vfr::Framerate GetFPS() const { return fps; }
-	int GetWidth() const { return vi.width; }
-	int GetHeight() const { return vi.height; }
-	double GetDAR() const { return 0; }
-	std::vector<int> GetKeyFrames() const { return keyframes; }
-	std::string GetWarning() const { return warning; }
-	std::string GetDecoderName() const { return decoder_name; }
-	std::string GetColorSpace() const { return colorspace; }
-};
-#endif

src/video_provider_cache.cpp

@@ -16,25 +16,16 @@
 
 #include "config.h"
 
-#include "video_provider_cache.h"
+#include "include/aegisub/video_provider.h"
 
 #include "options.h"
 #include "video_frame.h"
 
-#include <algorithm>
+#include <libaegisub/util.h>
-#include <boost/version.hpp>
 
-#if BOOST_VERSION <= 105200
+#include <list>
-// Compilation fails without this with boost 1.52. I have no idea why.
-static bool operator==(VideoFrame const& a, VideoFrame const& b) {
-	return a.width == b.width
-		&& a.height == b.height
-		&& a.pitch == b.pitch
-		&& a.flipped == b.flipped
-		&& a.data == b.data;
-}
-#endif
 
+namespace {
 /// A video frame and its frame number
 struct CachedFrame final : public VideoFrame {
 	int frame_number;
@@ -46,29 +37,47 @@ struct CachedFrame final : public VideoFrame {
 	}
 };
 
-VideoProviderCache::VideoProviderCache(std::unique_ptr<VideoProvider> parent)
+/// @class VideoProviderCache
-: master(std::move(parent))
+/// @brief A wrapper around a video provider which provides LRU caching
-, max_cache_size(OPT_GET("Provider/Video/Cache/Size")->GetInt() << 20) // convert MB to bytes
+class VideoProviderCache final : public VideoProvider {
-{
+	/// The source provider to get frames from
-}
+	std::unique_ptr<VideoProvider> master;
 
-VideoProviderCache::~VideoProviderCache() {
+	/// @brief Maximum size of the cache in bytes
-}
+	///
+	/// Note that this is a soft limit. The cache stops allocating new frames
+	/// once it has exceeded the limit, but it never tries to shrink
+	const size_t max_cache_size;
+
+	/// Cache of video frames with the most recently used ones at the front
+	std::list<CachedFrame> cache;
+
+public:
+	VideoProviderCache(std::unique_ptr<VideoProvider> master)
+	: master(std::move(master))
+	, max_cache_size(OPT_GET("Provider/Video/Cache/Size")->GetInt() << 20) // convert MB to bytes
+	{
+	}
+
+	std::shared_ptr<VideoFrame> GetFrame(int n) override;
+
+	int GetFrameCount() const override             { return master->GetFrameCount(); }
+	int GetWidth() const override                  { return master->GetWidth(); }
+	int GetHeight() const override                 { return master->GetHeight(); }
+	double GetDAR() const override                 { return master->GetDAR(); }
+	agi::vfr::Framerate GetFPS() const override    { return master->GetFPS(); }
+	std::vector<int> GetKeyFrames() const override { return master->GetKeyFrames(); }
+	std::string GetWarning() const override        { return master->GetWarning(); }
+	std::string GetDecoderName() const override    { return master->GetDecoderName(); }
+	std::string GetColorSpace() const override     { return master->GetColorSpace(); }
+};
 
 std::shared_ptr<VideoFrame> VideoProviderCache::GetFrame(int n) {
 	size_t total_size = 0;
 
 	for (auto cur = cache.begin(); cur != cache.end(); ++cur) {
 		if (cur->frame_number == n) {
-#if BOOST_VERSION <= 105200
-			// Until boost 1.52, boost::container::list incorrectly asserted
-			// that this != &other, so do an extra splice through an empty list
-			decltype(cache) temp;
-			temp.splice(temp.begin(), cache, cur);
-			cache.splice(cache.begin(), temp, temp.begin());
-#else
 			cache.splice(cache.begin(), cache, cur); // Move to front
-#endif
 			return std::make_shared<VideoFrame>(cache.front());
 		}
 
@@ -83,3 +92,8 @@ std::shared_ptr<VideoFrame> VideoProviderCache::GetFrame(int n) {
 
 	return frame;
 }
+}
+
+std::unique_ptr<VideoProvider> CreateCacheVideoProvider(std::unique_ptr<VideoProvider> parent) {
+	return agi::util::make_unique<VideoProviderCache>(std::move(parent));
+}

src/video_provider_cache.h

@@ -1,53 +0,0 @@
-// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
-//
-// Permission to use, copy, modify, and distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-// Aegisub Project http://www.aegisub.org/
-
-#include <boost/container/list.hpp>
-
-#include "include/aegisub/video_provider.h"
-
-struct CachedFrame;
-
-/// @class VideoProviderCache
-/// @brief A wrapper around a video provider which provides LRU caching
-class VideoProviderCache final : public VideoProvider {
-	/// The source provider to get frames from
-	std::unique_ptr<VideoProvider> master;
-
-	/// @brief Maximum size of the cache in bytes
-	///
-	/// Note that this is a soft limit. The cache stops allocating new frames
-	/// once it has exceeded the limit, but it never tries to shrink
-	const size_t max_cache_size;
-
-	/// Cache of video frames with the most recently used ones at the front
-	boost::container::list<CachedFrame> cache;
-
-public:
-	VideoProviderCache(std::unique_ptr<VideoProvider> master);
-	~VideoProviderCache();
-
-	std::shared_ptr<VideoFrame> GetFrame(int n) override;
-
-	int GetFrameCount() const override             { return master->GetFrameCount(); }
-	int GetWidth() const override                  { return master->GetWidth(); }
-	int GetHeight() const override                 { return master->GetHeight(); }
-	double GetDAR() const override                 { return master->GetDAR(); }
-	agi::vfr::Framerate GetFPS() const override    { return master->GetFPS(); }
-	std::vector<int> GetKeyFrames() const override { return master->GetKeyFrames(); }
-	std::string GetWarning() const override        { return master->GetWarning(); }
-	std::string GetDecoderName() const override    { return master->GetDecoderName(); }
-	std::string GetColorSpace() const override     { return master->GetColorSpace(); }
-};

src/video_provider_dummy.cpp

@@ -49,13 +49,18 @@
 #include <boost/format.hpp>
 #include <boost/gil/gil_all.hpp>
 
-void DummyVideoProvider::Create(double fps, int frames, int width, int height, unsigned char red, unsigned char green, unsigned char blue, bool pattern) {
+DummyVideoProvider::DummyVideoProvider(double fps, int frames, int width, int height, agi::Color colour, bool pattern)
-	this->framecount = frames;
+: framecount(frames)
-	this->fps = fps;
+, fps(fps)
-	this->width = width;
+, width(width)
-	this->height = height;
+, height(height)
+{
 	data.resize(width * height * 4);
 
+	auto red = colour.r;
+	auto green = colour.g;
+	auto blue = colour.b;
+
 	using namespace boost::gil;
 	auto dst = interleaved_view(width, height, (bgra8_pixel_t*)data.data(), 4 * width);
 
@@ -84,9 +89,17 @@ void DummyVideoProvider::Create(double fps, int frames, int width, int height, u
 	}
 }
 
-DummyVideoProvider::DummyVideoProvider(agi::fs::path const& filename, std::string const&) {
+std::string DummyVideoProvider::MakeFilename(double fps, int frames, int width, int height, agi::Color colour, bool pattern) {
+	return str(boost::format("?dummy:%f:%d:%d:%d:%d:%d:%d:%s") % fps % frames % width % height % (int)colour.r % (int)colour.g % (int)colour.b % (pattern ? "c" : ""));
+}
+
+std::shared_ptr<VideoFrame> DummyVideoProvider::GetFrame(int) {
+	return std::make_shared<VideoFrame>(data.data(), width, height, width * 4, false);
+}
+
+std::unique_ptr<VideoProvider> CreateDummyVideoProvider(agi::fs::path const& filename, std::string const&) {
 	if (!boost::starts_with(filename.string(), "?dummy"))
-		throw agi::fs::FileNotFound(std::string("Attempted creating dummy video provider with non-dummy filename"));
+		return {};
 
 	std::vector<std::string> toks;
 	auto const& fields = filename.string().substr(7);
@@ -109,17 +122,5 @@ DummyVideoProvider::DummyVideoProvider(agi::fs::path const& filename, std::strin
 
 	bool pattern = toks[i] == "c";
 
-	Create(fps, frames, width, height, red, green, blue, pattern);
+	return agi::util::make_unique<DummyVideoProvider>(fps, frames, width, height, agi::Color(red, green, blue), pattern);
-}
-
-DummyVideoProvider::DummyVideoProvider(double fps, int frames, int width, int height, agi::Color colour, bool pattern) {
-	Create(fps, frames, width, height, colour.r, colour.g, colour.b, pattern);
-}
-
-std::string DummyVideoProvider::MakeFilename(double fps, int frames, int width, int height, agi::Color colour, bool pattern) {
-	return str(boost::format("?dummy:%f:%d:%d:%d:%d:%d:%d:%s") % fps % frames % width % height % (int)colour.r % (int)colour.g % (int)colour.b % (pattern ? "c" : ""));
-}
-
-std::shared_ptr<VideoFrame> DummyVideoProvider::GetFrame(int) {
-	return std::make_shared<VideoFrame>(data.data(), width, height, width * 4, false);
 }

src/video_provider_dummy.h

@@ -50,21 +50,7 @@ class DummyVideoProvider final : public VideoProvider {
 	/// The data for the image returned for all frames
 	std::vector<unsigned char> data;
 
-	/// Create the dummy frame from the given parameters
-	/// @param fps Frame rate of the dummy video
-	/// @param frames Length in frames of the dummy video
-	/// @param width Width in pixels of the dummy video
-	/// @param height Height in pixels of the dummy video
-	/// @param red Red component of the primary colour of the dummy video
-	/// @param green Green component of the primary colour of the dummy video
-	/// @param blue Blue component of the primary colour of the dummy video
-	/// @param pattern Use a checkerboard pattern rather than a solid colour
-	void Create(double fps, int frames, int width, int height, unsigned char red, unsigned char green, unsigned char blue, bool pattern);
-
 public:
-	/// Create a dummy video from a string returned from MakeFilename
-	DummyVideoProvider(agi::fs::path const& filename, std::string const& colormatix);
-
 	/// Create a dummy video from separate parameters
 	/// @param fps Frame rate of the dummy video
 	/// @param frames Length in frames of the dummy video

src/video_provider_ffmpegsource.cpp

@@ -35,7 +35,8 @@
 #include "config.h"
 
 #ifdef WITH_FFMS2
-#include "video_provider_ffmpegsource.h"
+#include "ffmpegsource_common.h"
+#include "include/aegisub/video_provider.h"
 
 #include "compat.h"
 #include "options.h"
@@ -44,11 +45,47 @@
 #include "video_frame.h"
 
 #include <libaegisub/fs.h>
+#include <libaegisub/util.h>
 
 #include <wx/choicdlg.h>
 #include <wx/msgdlg.h>
 
 namespace {
+/// @class FFmpegSourceVideoProvider
+/// @brief Implements video loading through the FFMS library.
+class FFmpegSourceVideoProvider final : public VideoProvider, FFmpegSourceProvider {
+	/// video source object
+	agi::scoped_holder<FFMS_VideoSource*, void (FFMS_CC*)(FFMS_VideoSource*)> VideoSource;
+	const FFMS_VideoProperties *VideoInfo = nullptr; ///< video properties
+
+	int Width = -1;                 ///< width in pixels
+	int Height = -1;                ///< height in pixels
+	double DAR;                     ///< display aspect ratio
+	std::vector<int> KeyFramesList; ///< list of keyframes
+	agi::vfr::Framerate Timecodes;  ///< vfr object
+	std::string ColorSpace;         ///< Colorspace name
+
+	char FFMSErrMsg[1024];          ///< FFMS error message
+	FFMS_ErrorInfo ErrInfo;         ///< FFMS error codes/messages
+
+	void LoadVideo(agi::fs::path const& filename, std::string const& colormatrix);
+
+public:
+	FFmpegSourceVideoProvider(agi::fs::path const& filename, std::string const& colormatrix);
+
+	std::shared_ptr<VideoFrame> GetFrame(int n) override;
+
+	int GetFrameCount() const override { return VideoInfo->NumFrames; }
+	int GetWidth() const override { return Width; }
+	int GetHeight() const override { return Height; }
+	double GetDAR() const override { return DAR; }
+	agi::vfr::Framerate GetFPS() const override { return Timecodes; }
+	std::string GetColorSpace() const override { return ColorSpace; }
+	std::vector<int> GetKeyFrames() const override { return KeyFramesList; };
+	std::string GetDecoderName() const override { return "FFmpegSource"; }
+	bool WantsCaching() const override { return true; }
+};
+
 std::string colormatrix_description(int cs, int cr) {
 	// Assuming TV for unspecified
 	std::string str = cr == FFMS_CR_JPEG ? "PC" : "TV";
@@ -70,7 +107,6 @@ std::string colormatrix_description(int cs, int cr) {
 			throw VideoOpenError("Unknown video color space");
 	}
 }
-}
 
 FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(agi::fs::path const& filename, std::string const& colormatrix) try
 : VideoSource(nullptr, FFMS_DestroyVideoSource)
@@ -247,5 +283,10 @@ std::shared_ptr<VideoFrame> FFmpegSourceVideoProvider::GetFrame(int n) {
 
 	return std::make_shared<VideoFrame>(frame->Data[0], Width, Height, frame->Linesize[0], false);
 }
+}
+
+std::unique_ptr<VideoProvider> CreateFFmpegSourceVideoProvider(agi::fs::path const& path, std::string const& colormatrix) {
+	return agi::util::make_unique<FFmpegSourceVideoProvider>(path, colormatrix);
+}
 
 #endif /* WITH_FFMS2 */

src/video_provider_ffmpegsource.h

@@ -1,73 +0,0 @@
-// Copyright (c) 2008-2009, Karl Blomster
-// 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 video_provider_ffmpegsource.h
-/// @see video_provider_ffmpegsource.cpp
-/// @ingroup video_input ffms
-///
-
-#ifdef WITH_FFMS2
-#include "ffmpegsource_common.h"
-#include "include/aegisub/video_provider.h"
-
-/// @class FFmpegSourceVideoProvider
-/// @brief Implements video loading through the FFMS library.
-class FFmpegSourceVideoProvider final : public VideoProvider, FFmpegSourceProvider {
-	/// video source object
-	agi::scoped_holder<FFMS_VideoSource*, void (FFMS_CC*)(FFMS_VideoSource*)> VideoSource;
-	const FFMS_VideoProperties *VideoInfo = nullptr; ///< video properties
-
-	int Width = -1;                 ///< width in pixels
-	int Height = -1;                ///< height in pixels
-	double DAR;                     ///< display aspect ratio
-	std::vector<int> KeyFramesList; ///< list of keyframes
-	agi::vfr::Framerate Timecodes;  ///< vfr object
-	std::string ColorSpace;         ///< Colorspace name
-
-	char FFMSErrMsg[1024];          ///< FFMS error message
-	FFMS_ErrorInfo ErrInfo;         ///< FFMS error codes/messages
-
-	void LoadVideo(agi::fs::path const& filename, std::string const& colormatrix);
-
-public:
-	FFmpegSourceVideoProvider(agi::fs::path const& filename, std::string const& colormatrix);
-
-	std::shared_ptr<VideoFrame> GetFrame(int n) override;
-
-	int GetFrameCount() const override { return VideoInfo->NumFrames; }
-	int GetWidth() const override { return Width; }
-	int GetHeight() const override { return Height; }
-	double GetDAR() const override { return DAR; }
-	agi::vfr::Framerate GetFPS() const override { return Timecodes; }
-	std::string GetColorSpace() const override { return ColorSpace; }
-	std::vector<int> GetKeyFrames() const override { return KeyFramesList; };
-	std::string GetDecoderName() const override { return "FFmpegSource"; }
-	bool WantsCaching() const override { return true; }
-};
-#endif /* WITH_FFMS2 */

src/video_provider_manager.cpp

@@ -1,68 +1,95 @@
-// Copyright (c) 2006, Rodrigo Braz Monteiro
+// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
-// All rights reserved.
 //
-// Redistribution and use in source and binary forms, with or without
+// Permission to use, copy, modify, and distribute this software for any
-// modification, are permitted provided that the following conditions are met:
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
 //
-//   * Redistributions of source code must retain the above copyright notice,
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-//     this list of conditions and the following disclaimer.
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-//   * Redistributions in binary form must reproduce the above copyright notice,
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-//     this list of conditions and the following disclaimer in the documentation
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-//     and/or other materials provided with the distribution.
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-//   * Neither the name of the Aegisub Group nor the names of its contributors
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-//     may be used to endorse or promote products derived from this software
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 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 video_provider_manager.cpp
-/// @brief Keep track of installed video providers
-/// @ingroup video_input
-///
-
 #include "config.h"
 
 #include "video_provider_manager.h"
 
+#include "include/aegisub/video_provider.h"
 #include "options.h"
-#include "video_provider_avs.h"
-#include "video_provider_cache.h"
-#include "video_provider_dummy.h"
-#include "video_provider_ffmpegsource.h"
-#include "video_provider_yuv4mpeg.h"
 
 #include <libaegisub/fs.h>
 #include <libaegisub/log.h>
 #include <libaegisub/util.h>
 
-std::unique_ptr<VideoProvider> VideoProviderFactory::GetProvider(agi::fs::path const& video_file, std::string const& colormatrix) {
+std::unique_ptr<VideoProvider> CreateDummyVideoProvider(agi::fs::path const&, std::string const&);
-	std::vector<std::string> factories = GetClasses(OPT_GET("Video/Provider")->GetString());
+std::unique_ptr<VideoProvider> CreateYUV4MPEGVideoProvider(agi::fs::path const&, std::string const&);
-	factories.insert(factories.begin(), "YUV4MPEG");
+std::unique_ptr<VideoProvider> CreateFFmpegSourceVideoProvider(agi::fs::path const&, std::string const&);
-	factories.insert(factories.begin(), "Dummy");
+std::unique_ptr<VideoProvider> CreateAvisynthVideoProvider(agi::fs::path const&, std::string const&);
+
+std::unique_ptr<VideoProvider> CreateCacheVideoProvider(std::unique_ptr<VideoProvider>);
+
+namespace {
+	using factory_fn = std::unique_ptr<VideoProvider> (*)(agi::fs::path const&, std::string const&);
+	struct factory {
+		const char *name;
+		factory_fn create;
+		bool hidden;
+	};
+
+	const factory providers[] = {
+		{"Dummy", CreateDummyVideoProvider, true},
+		{"YUV4MPEG", CreateYUV4MPEGVideoProvider, true},
+#ifdef WITH_FFMS2
+		{"FFmpegSource", CreateFFmpegSourceVideoProvider, false},
+#endif
+#ifdef WITH_AVISYNTH
+		{"Avisynth", CreateAvisynthVideoProvider, false},
+#endif
+	};
+}
+
+std::vector<std::string> VideoProviderFactory::GetClasses() {
+	std::vector<std::string> list;
+	for (auto const& provider : providers) {
+		if (!provider.hidden)
+			list.push_back(provider.name);
+	}
+	return list;
+}
+
+std::unique_ptr<VideoProvider> VideoProviderFactory::GetProvider(agi::fs::path const& filename, std::string const& colormatrix) {
+	auto preferred = OPT_GET("Video/Provider")->GetString();
+	std::vector<const factory *> sorted;
+	auto preferred_insertion_point = sorted.end();
+	for (auto const& provider : providers) {
+		if (provider.hidden)
+			sorted.push_back(&provider);
+		else if (preferred_insertion_point == sorted.end()) {
+			sorted.push_back(&provider);
+			preferred_insertion_point = prev(sorted.end());
+		}
+		else if (preferred == provider.name)
+			sorted.insert(preferred_insertion_point, &provider);
+		else
+			sorted.push_back(&provider);
+	}
 
 	bool found = false;
 	bool supported = false;
 	std::string errors;
 	errors.reserve(1024);
 
-	for (auto const& factory : factories) {
+	for (auto factory : sorted) {
 		std::string err;
 		try {
-			auto provider = Create(factory, video_file, colormatrix);
+			auto provider = factory->create(filename, colormatrix);
-			LOG_I("manager/video/provider") << factory << ": opened " << video_file;
+			if (!provider) continue;
-			return provider->WantsCaching() ? agi::util::make_unique<VideoProviderCache>(std::move(provider)) : std::move(provider);
+			LOG_I("manager/video/provider") << factory->name << ": opened " << filename;
+			return provider->WantsCaching() ? CreateCacheVideoProvider(std::move(provider)) : std::move(provider);
 		}
 		catch (agi::fs::FileNotFound const&) {
 			err = "file not found.";
@@ -82,26 +109,15 @@ std::unique_ptr<VideoProvider> VideoProviderFactory::GetProvider(agi::fs::path c
 			err = ex.GetMessage();
 		}
 
-		errors += factory + ": " + err + "\n";
+		errors += std::string(factory->name) + ": " + err + "\n";
-		LOG_D("manager/video/provider") << factory << ": " << err;
+		LOG_D("manager/video/provider") << factory->name << ": " << err;
 	}
 
 	// No provider could open the file
-	LOG_E("manager/video/provider") << "Could not open " << video_file;
+	LOG_E("manager/video/provider") << "Could not open " << filename;
-	std::string msg = "Could not open " + video_file.string() + ":\n" + errors;
+	std::string msg = "Could not open " + filename.string() + ":\n" + errors;
 
-	if (!found) throw agi::fs::FileNotFound(video_file.string());
+	if (!found) throw agi::fs::FileNotFound(filename.string());
 	if (!supported) throw VideoNotSupported(msg);
 	throw VideoOpenError(msg);
 }
-
-void VideoProviderFactory::RegisterProviders() {
-#ifdef WITH_AVISYNTH
-	Register<AvisynthVideoProvider>("Avisynth");
-#endif
-#ifdef WITH_FFMS2
-	Register<FFmpegSourceVideoProvider>("FFmpegSource");
-#endif
-	Register<DummyVideoProvider>("Dummy", true);
-	Register<YUV4MPEGVideoProvider>("YUV4MPEG", true);
-}

src/video_provider_manager.h

@@ -1,4 +1,4 @@
-// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
+// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
 //
 // Permission to use, copy, modify, and distribute this software for any
 // purpose with or without fee is hereby granted, provided that the above
@@ -14,13 +14,15 @@
 //
 // Aegisub Project http://www.aegisub.org/
 
-#include "factory_manager.h"
-#include "include/aegisub/video_provider.h"
-
 #include <libaegisub/fs_fwd.h>
 
-class VideoProviderFactory final : public Factory<VideoProvider, agi::fs::path, std::string> {
+#include <memory>
-public:
+#include <string>
+#include <vector>
+
+class VideoProvider;
+
+struct VideoProviderFactory {
+	static std::vector<std::string> GetClasses();
 	static std::unique_ptr<VideoProvider> GetProvider(agi::fs::path const& video_file, std::string const& colormatrix);
-	static void RegisterProviders();
 };

src/video_provider_yuv4mpeg.cpp

@@ -34,7 +34,7 @@
 
 #include "config.h"
 
-#include "video_provider_yuv4mpeg.h"
+#include "include/aegisub/video_provider.h"
 
 #include "compat.h"
 #include "utils.h"
@@ -47,11 +47,122 @@
 
 #include <boost/algorithm/string/case_conv.hpp>
 #include <boost/filesystem/path.hpp>
+#include <memory>
+#include <vector>
+
+/// the maximum allowed header length, in bytes
+#define YUV4MPEG_HEADER_MAXLEN 128
+
+namespace {
+
+/// @class YUV4MPEGVideoProvider
+/// @brief Implements reading of YUV4MPEG uncompressed video files
+class YUV4MPEGVideoProvider final : public VideoProvider {
+	/// Pixel formats
+	enum Y4M_PixelFormat {
+		Y4M_PIXFMT_NONE		= -1,	/// not set/unknown
+
+		/// 4:2:0 sampling variants.
+		/// afaict the only difference between these three
+		/// is the chroma sample location, and nobody cares about that.
+		Y4M_PIXFMT_420JPEG,		/// 4:2:0, H/V centered, for JPEG/MPEG-1
+		Y4M_PIXFMT_420MPEG2,	/// 4:2:0, H cosited, for MPEG-2
+		Y4M_PIXFMT_420PALDV,	/// 4:2:0, alternating Cb/Cr, for PAL-DV
+
+		Y4M_PIXFMT_411,			/// 4:1:1, H cosited
+		Y4M_PIXFMT_422,			/// 4:2:2, H cosited
+		Y4M_PIXFMT_444,			/// 4:4:4, i.e. no chroma subsampling
+		Y4M_PIXFMT_444ALPHA,	/// 4:4:4 plus alpha channel
+
+		Y4M_PIXFMT_MONO		/// luma only (grayscale)
+	};
+
+
+	/// Interlacing mode for an entire stream
+	enum Y4M_InterlacingMode {
+		Y4M_ILACE_NOTSET = -1,	/// undefined
+		Y4M_ILACE_PROGRESSIVE,	/// progressive (no interlacing)
+
+		Y4M_ILACE_TFF,			/// interlaced, top field first
+		Y4M_ILACE_BFF,			/// interlaced, bottom field first
+
+		Y4M_ILACE_MIXED,		/// mixed interlaced/progressive, possibly with RFF flags
+		Y4M_ILACE_UNKNOWN		/// unknown interlacing mode (not the same as undefined)
+	};
+
+
+	/// Frame information flags
+	enum Y4M_FrameFlags {
+		Y4M_FFLAG_NOTSET	= -1,		/// undefined
+		Y4M_FFLAG_NONE		= 0x0000,	/// no flags set
+
+		/// field order/repeat field flags
+		Y4M_FFLAG_R_TFF		= 0x0001,	/// top field first
+		Y4M_FFLAG_R_TFF_R	= 0x0002,	/// top field first, and repeat that field
+		Y4M_FFLAG_R_BFF		= 0x0004,	/// bottom field first
+		Y4M_FFLAG_R_BFF_R	= 0x0008,	/// bottom field first, and repeat that field
+		Y4M_FFLAG_R_P		= 0x0010,	/// progressive
+		Y4M_FFLAG_R_P_R		= 0x0020,	/// progressive, and repeat frame once
+		Y4M_FFLAG_R_P_RR	= 0x0040,	/// progressive, and repeat frame twice
+
+		/// temporal sampling flags
+		Y4M_FFLAG_T_P		= 0x0080,	/// progressive (fields sampled at the same time)
+		Y4M_FFLAG_T_I		= 0x0100,	/// interlaced (fields sampled at different times)
+
+		/// chroma subsampling flags
+		Y4M_FFLAG_C_P		= 0x0200,	/// progressive (whole frame subsampled)
+		Y4M_FFLAG_C_I		= 0x0400,	/// interlaced (fields subsampled independently)
+		Y4M_FFLAG_C_UNKNOWN = 0x0800	/// unknown (only allowed for non-4:2:0 sampling)
+	};
+
+	agi::read_file_mapping file;
+	bool inited = false;	/// initialization state
+
+	int w = 0, h = 0;	/// frame width/height
+	int num_frames = -1; /// length of file in frames
+	int frame_sz;	/// size of each frame in bytes
+	int luma_sz;	/// size of the luma plane of each frame, in bytes
+	int chroma_sz;	/// size of one of the two chroma planes of each frame, in bytes
+
+	Y4M_PixelFormat pixfmt = Y4M_PIXFMT_NONE;		/// colorspace/pixel format
+	Y4M_InterlacingMode imode = Y4M_ILACE_NOTSET;	/// interlacing mode (for the entire stream)
+	struct {
+		int num = -1;	/// numerator
+		int den = 1;	/// denominator
+	} fps_rat;          /// framerate
+
+	agi::vfr::Framerate fps;
+
+	/// a list of byte positions detailing where in the file
+	/// each frame header can be found
+	std::vector<uint64_t> seek_table;
+
+	void CheckFileFormat();
+	void ParseFileHeader(const std::vector<std::string>& tags);
+	Y4M_FrameFlags ParseFrameHeader(const std::vector<std::string>& tags);
+	std::vector<std::string> ReadHeader(uint64_t &startpos);
+	int IndexFile(uint64_t pos);
+
+public:
+	YUV4MPEGVideoProvider(agi::fs::path const& filename);
+
+	std::shared_ptr<VideoFrame> GetFrame(int n) override;
+
+	int GetFrameCount() const override             { return num_frames; }
+	int GetWidth() const override                  { return w; }
+	int GetHeight() const override                 { return h; }
+	double GetDAR() const override                 { return 0; }
+	agi::vfr::Framerate GetFPS() const override    { return fps; }
+	std::vector<int> GetKeyFrames() const override { return {}; }
+	std::string GetColorSpace() const override     { return "TV.601"; }
+	std::string GetDecoderName() const override    { return "YU4MPEG"; }
+	bool WantsCaching() const override             { return true; }
+};
 
 /// @brief Constructor
 /// @param filename The filename to open
-YUV4MPEGVideoProvider::YUV4MPEGVideoProvider(agi::fs::path const& filename, std::string const&)
+YUV4MPEGVideoProvider::YUV4MPEGVideoProvider(agi::fs::path const& filename)
-: file(agi::util::make_unique<agi::read_file_mapping>(filename))
+: file(filename)
 {
 	CheckFileFormat();
 
@@ -89,15 +200,13 @@ YUV4MPEGVideoProvider::YUV4MPEGVideoProvider(agi::fs::path const& filename, std:
 		throw VideoOpenError("Unable to determine file length");
 }
 
-YUV4MPEGVideoProvider::~YUV4MPEGVideoProvider() { }
-
 /// @brief Checks if the file is an YUV4MPEG file or not
 /// Note that it reports the error by throwing an exception,
 /// not by returning a false value.
 void YUV4MPEGVideoProvider::CheckFileFormat() {
-	if (file->size() < 10)
+	if (file.size() < 10)
 		throw VideoNotSupported("CheckFileFormat: File is not a YUV4MPEG file (too small)");
-	if (strncmp("YUV4MPEG2 ", file->read(0, 10), 10))
+	if (strncmp("YUV4MPEG2 ", file.read(0, 10), 10))
 		throw VideoNotSupported("CheckFileFormat: File is not a YUV4MPEG file (bad magic)");
 }
 
@@ -106,11 +215,11 @@ void YUV4MPEGVideoProvider::CheckFileFormat() {
 /// @return				A list of parameters
 std::vector<std::string> YUV4MPEGVideoProvider::ReadHeader(uint64_t &pos) {
 	std::vector<std::string> tags;
-	if (pos >= file->size())
+	if (pos >= file.size())
 		return tags;
 
-	auto len = std::min<uint64_t>(YUV4MPEG_HEADER_MAXLEN, file->size() - pos);
+	auto len = std::min<uint64_t>(YUV4MPEG_HEADER_MAXLEN, file.size() - pos);
-	auto buff = file->read(pos, len);
+	auto buff = file.read(pos, len);
 
 	// read header until terminating newline (0x0A) is found
 	auto curtag = buff;
@@ -307,7 +416,7 @@ std::shared_ptr<VideoFrame> YUV4MPEGVideoProvider::GetFrame(int n) {
 			throw "YUV4MPEG video provider: GetFrame: Unsupported source colorspace";
 	}
 
-	auto src_y = reinterpret_cast<const unsigned char *>(file->read(seek_table[n], luma_sz + chroma_sz * 2));
+	auto src_y = reinterpret_cast<const unsigned char *>(file.read(seek_table[n], luma_sz + chroma_sz * 2));
 	auto src_u = src_y + luma_sz;
 	auto src_v = src_u + chroma_sz;
 	std::vector<unsigned char> data;
@@ -337,3 +446,8 @@ std::shared_ptr<VideoFrame> YUV4MPEGVideoProvider::GetFrame(int n) {
 
 	return std::make_shared<VideoFrame>(data.data(), w, h, w * 4, false);
 }
+}
+
+std::unique_ptr<VideoProvider> CreateYUV4MPEGVideoProvider(agi::fs::path const& path, std::string const&) {
+	return agi::util::make_unique<YUV4MPEGVideoProvider>(path);
+}

src/video_provider_yuv4mpeg.h

@@ -1,148 +0,0 @@
-// Copyright (c) 2009, Karl Blomster
-// 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 video_provider_yuv4mpeg.h
-/// @see video_provider_yuv4mpeg.cpp
-/// @ingroup video_input
-///
-
-#include "include/aegisub/video_provider.h"
-
-#include <memory>
-#include <vector>
-
-namespace agi { class read_file_mapping; }
-
-/// the maximum allowed header length, in bytes
-#define YUV4MPEG_HEADER_MAXLEN 128
-
-/// @class YUV4MPEGVideoProvider
-/// @brief Implements reading of YUV4MPEG uncompressed video files
-class YUV4MPEGVideoProvider final : public VideoProvider {
-	/// Pixel formats
-	enum Y4M_PixelFormat {
-		Y4M_PIXFMT_NONE		= -1,	/// not set/unknown
-
-		/// 4:2:0 sampling variants.
-		/// afaict the only difference between these three
-		/// is the chroma sample location, and nobody cares about that.
-		Y4M_PIXFMT_420JPEG,		/// 4:2:0, H/V centered, for JPEG/MPEG-1
-		Y4M_PIXFMT_420MPEG2,	/// 4:2:0, H cosited, for MPEG-2
-		Y4M_PIXFMT_420PALDV,	/// 4:2:0, alternating Cb/Cr, for PAL-DV
-
-		Y4M_PIXFMT_411,			/// 4:1:1, H cosited
-		Y4M_PIXFMT_422,			/// 4:2:2, H cosited
-		Y4M_PIXFMT_444,			/// 4:4:4, i.e. no chroma subsampling
-		Y4M_PIXFMT_444ALPHA,	/// 4:4:4 plus alpha channel
-
-		Y4M_PIXFMT_MONO		/// luma only (grayscale)
-	};
-
-
-	/// Interlacing mode for an entire stream
-	enum Y4M_InterlacingMode {
-		Y4M_ILACE_NOTSET = -1,	/// undefined
-		Y4M_ILACE_PROGRESSIVE,	/// progressive (no interlacing)
-
-		Y4M_ILACE_TFF,			/// interlaced, top field first
-		Y4M_ILACE_BFF,			/// interlaced, bottom field first
-
-		Y4M_ILACE_MIXED,		/// mixed interlaced/progressive, possibly with RFF flags
-		Y4M_ILACE_UNKNOWN		/// unknown interlacing mode (not the same as undefined)
-	};
-
-
-	/// Frame information flags
-	enum Y4M_FrameFlags {
-		Y4M_FFLAG_NOTSET	= -1,		/// undefined
-		Y4M_FFLAG_NONE		= 0x0000,	/// no flags set
-
-		/// field order/repeat field flags
-		Y4M_FFLAG_R_TFF		= 0x0001,	/// top field first
-		Y4M_FFLAG_R_TFF_R	= 0x0002,	/// top field first, and repeat that field
-		Y4M_FFLAG_R_BFF		= 0x0004,	/// bottom field first
-		Y4M_FFLAG_R_BFF_R	= 0x0008,	/// bottom field first, and repeat that field
-		Y4M_FFLAG_R_P		= 0x0010,	/// progressive
-		Y4M_FFLAG_R_P_R		= 0x0020,	/// progressive, and repeat frame once
-		Y4M_FFLAG_R_P_RR	= 0x0040,	/// progressive, and repeat frame twice
-
-		/// temporal sampling flags
-		Y4M_FFLAG_T_P		= 0x0080,	/// progressive (fields sampled at the same time)
-		Y4M_FFLAG_T_I		= 0x0100,	/// interlaced (fields sampled at different times)
-
-		/// chroma subsampling flags
-		Y4M_FFLAG_C_P		= 0x0200,	/// progressive (whole frame subsampled)
-		Y4M_FFLAG_C_I		= 0x0400,	/// interlaced (fields subsampled independently)
-		Y4M_FFLAG_C_UNKNOWN = 0x0800	/// unknown (only allowed for non-4:2:0 sampling)
-	};
-
-	std::unique_ptr<agi::read_file_mapping> file;
-	bool inited = false;	/// initialization state
-
-	int w = 0, h = 0;	/// frame width/height
-	int num_frames = -1; /// length of file in frames
-	int frame_sz;	/// size of each frame in bytes
-	int luma_sz;	/// size of the luma plane of each frame, in bytes
-	int chroma_sz;	/// size of one of the two chroma planes of each frame, in bytes
-
-	Y4M_PixelFormat pixfmt = Y4M_PIXFMT_NONE;		/// colorspace/pixel format
-	Y4M_InterlacingMode imode = Y4M_ILACE_NOTSET;	/// interlacing mode (for the entire stream)
-	struct {
-		int num = -1;	/// numerator
-		int den = 1;	/// denominator
-	} fps_rat;          /// framerate
-
-	agi::vfr::Framerate fps;
-
-	/// a list of byte positions detailing where in the file
-	/// each frame header can be found
-	std::vector<uint64_t> seek_table;
-
-	void CheckFileFormat();
-	void ParseFileHeader(const std::vector<std::string>& tags);
-	Y4M_FrameFlags ParseFrameHeader(const std::vector<std::string>& tags);
-	std::vector<std::string> ReadHeader(uint64_t &startpos);
-	int IndexFile(uint64_t pos);
-
-public:
-	YUV4MPEGVideoProvider(agi::fs::path const& filename, std::string const&);
-	~YUV4MPEGVideoProvider();
-
-	std::shared_ptr<VideoFrame> GetFrame(int n) override;
-
-	int GetFrameCount() const override             { return num_frames; }
-	int GetWidth() const override                  { return w; }
-	int GetHeight() const override                 { return h; }
-	double GetDAR() const override                 { return 0; }
-	agi::vfr::Framerate GetFPS() const override    { return fps; }
-	std::vector<int> GetKeyFrames() const override { return {}; }
-	std::string GetColorSpace() const override     { return "TV.601"; }
-	std::string GetDecoderName() const override    { return "YU4MPEG"; }
-	bool WantsCaching() const override             { return true; }
-};