Aegisub/aegisub/libmedia/video/ffms_video.h

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// Copyright (c) 2008-2009, Karl Blomster <thefluff@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.
//
// $Id$
/// @file ffms_video.h
/// @brief FFmpegSource Video support.
/// @ingroup fmms video
#ifndef AGI_PRE
#include <vector>
#endif
#include <libaegisub/exception.h>
#include "../../libffms/include/ffms.h"
#include "libaegisub/vfr.h"
#include "../common/ffms_common.h"
#include "libmedia/video.h"
namespace media {
namespace ffms {
/// @class FFmpegSourceVideoProvider
/// @brief Implements video loading through the FFMS library.
class FFmpegSourceVideoProvider : public VideoProvider, FFmpegSourceProvider {
private:
FFMS_VideoSource *VideoSource; /// video source object
const FFMS_VideoProperties *VideoInfo; /// video properties
int Width; /// width in pixels
int Height; /// height in pixels
int FrameNumber; /// current framenumber
std::vector<int> KeyFramesList; /// list of keyframes
agi::vfr::Framerate Timecodes; /// vfr object
bool COMInited; /// COM initialization state
media::AegiVideoFrame CurFrame; /// current video frame
char FFMSErrMsg[1024]; /// FFMS error message
FFMS_ErrorInfo ErrInfo; /// FFMS error codes/messages
void LoadVideo(std::string filename);
void Close();
public:
FFmpegSourceVideoProvider(std::string filename);
~FFmpegSourceVideoProvider();
const media::AegiVideoFrame GetFrame(int n);
int GetPosition() const { return FrameNumber; }
int GetFrameCount() const { return VideoInfo->NumFrames; }
int GetWidth() const { return Width; }
int GetHeight() const { return Height; }
agi::vfr::Framerate GetFPS() const { return Timecodes; }
/// @brief Gets a list of keyframes
/// @return Returns a vector<int> of keyframes.
std::vector<int> GetKeyFrames() const { return KeyFramesList; };
std::string GetDecoderName() const { return "FFmpegSource"; }
/// @brief Gets the desired cache behavior.
/// @return Returns true.
bool WantsCaching() const { return true; }
};
} // namespace ffms
} // namespace media