// Copyright (c) 2008-2009, Karl Blomster
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/// @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 : 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 */