263 lines
8.4 KiB
C++
263 lines
8.4 KiB
C++
// Copyright (c) 2005-2007, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file video_context.h
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/// @see video_context.cpp
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/// @ingroup video
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///
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#ifndef AGI_PRE
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#include <time.h>
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#include <list>
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#include <memory>
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#include <wx/timer.h>
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#include <wx/stopwatch.h>
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#endif
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#include <libaegisub/signal.h>
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#include <libaegisub/vfr.h>
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class AegiVideoFrame;
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class SubtitlesProviderErrorEvent;
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class ThreadedFrameSource;
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class VideoProvider;
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class VideoProviderErrorEvent;
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namespace agi {
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struct Context;
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class OptionValue;
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}
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/// DOCME
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/// @class VideoContext
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/// @brief DOCME
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///
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/// DOCME
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class VideoContext : public wxEvtHandler {
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/// Current frame number changed (new frame number)
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agi::signal::Signal<int> Seek;
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/// A new video was opened
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agi::signal::Signal<> VideoOpen;
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/// New keyframes opened (new keyframe data)
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agi::signal::Signal<std::vector<int> const&> KeyframesOpen;
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/// New timecodes opened (new timecode data)
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agi::signal::Signal<agi::vfr::Framerate const&> TimecodesOpen;
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/// Aspect ratio was changed (type, value)
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agi::signal::Signal<int, double> ARChange;
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agi::Context *context;
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/// The video provider owned by the threaded frame source, or NULL if no
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/// video is open
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VideoProvider *videoProvider;
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/// Asynchronous provider of video frames
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std::auto_ptr<ThreadedFrameSource> provider;
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/// Filename of currently open video
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wxString videoFile;
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/// List of frame numbers which are keyframes
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std::vector<int> keyFrames;
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/// File name of the currently open keyframes or empty if keyframes are not overridden
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wxString keyFramesFilename;
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/// DOCME
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wxTimer playback;
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/// Time since playback was last started
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wxStopWatch playTime;
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/// The start time of the first frame of the current playback; undefined if
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/// video is not currently playing
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int startMS;
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/// The last frame to play if video is currently playing
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int endFrame;
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/// The frame number which was last requested from the video provider,
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/// which may not be the same thing as the currently displayed frame
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int frame_n;
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/// The picture aspect ratio of the video if the aspect ratio has been
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/// overridden by the user
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double arValue;
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/// DOCME
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int arType;
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/// Does the currently loaded video file have subtitles muxed into it?
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bool hasSubtitles;
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/// Filename of the currently loaded timecodes file, or empty if timecodes
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/// have not been overriden
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wxString ovrTimecodeFile;
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const agi::OptionValue* playAudioOnStep;
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void OnPlayTimer(wxTimerEvent &event);
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/// The timecodes from the video file
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agi::vfr::Framerate videoFPS;
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/// External timecode which have been loaded, if any
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agi::vfr::Framerate ovrFPS;
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void OnVideoError(VideoProviderErrorEvent const& err);
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void OnSubtitlesError(SubtitlesProviderErrorEvent const& err);
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void OnSubtitlesCommit();
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void OnSubtitlesSave();
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/// Close the video, keyframes and timecodes
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void Reset();
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public:
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const agi::vfr::Framerate &VFR_Input;
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const agi::vfr::Framerate &VFR_Output;
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VideoContext();
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~VideoContext();
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/// @brief Set the context that this is the video controller for
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/// @param context Initialized project context
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///
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/// Once this is no longer a singleton this can probably be moved into
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/// the constructor
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void SetContext(agi::Context *context);
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/// @brief Get the video provider used for the currently open video
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VideoProvider *GetProvider() const { return videoProvider; }
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/// Synchronously get a video frame
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/// @param n Frame number to get
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/// @param raw If true, subtitles are not rendered on the frame
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/// @return The requested frame
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std::tr1::shared_ptr<AegiVideoFrame> GetFrame(int n, bool raw = false);
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/// Asynchronously get a video frame, triggering a EVT_FRAME_READY event when it's ready
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/// @param n Frame number to get
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void GetFrameAsync(int n);
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/// Is there a video loaded?
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bool IsLoaded() const { return !!videoProvider; }
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/// Get the file name of the currently open video, if any
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wxString GetVideoName() const { return videoFile; }
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/// Is the video currently playing?
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bool IsPlaying() const { return playback.IsRunning(); }
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/// Does the video file loaded have muxed subtitles that we can load?
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bool HasSubtitles() const { return hasSubtitles; }
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/// Get the width of the currently open video
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int GetWidth() const;
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/// Get the height of the currently open video
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int GetHeight() const;
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/// Get the length in frames of the currently open video
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int GetLength() const;
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/// Get the current frame number
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int GetFrameN() const { return frame_n; }
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double GetARFromType(int type) const;
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/// Override the aspect ratio of the currently loaded video
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/// @param type Aspect ratio type from 0-4
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/// @param value If type is 4 (custom), the aspect ratio to use
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void SetAspectRatio(int type, double value=1.0);
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/// @brief DOCME
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/// @return
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int GetAspectRatioType() const { return arType; }
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/// Get the current aspect ratio of the video
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double GetAspectRatioValue() const { return arValue; }
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/// @brief Open a new video
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/// @param filename Video to open, or empty to close the current video
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void SetVideo(const wxString &filename);
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/// @brief Close and reopen the current video
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void Reload();
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/// @brief Jump to the beginning of a frame
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/// @param n Frame number to jump to
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void JumpToFrame(int n);
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/// @brief Jump to a time
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/// @param ms Time to jump to in milliseconds
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/// @param end Type of time
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void JumpToTime(int ms, agi::vfr::Time end = agi::vfr::START);
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/// Starting playing the video
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void Play();
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/// Play the next frame then stop
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void NextFrame();
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/// Play the previous frame then stop
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void PrevFrame();
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/// Seek to the beginning of the current line, then play to the end of it
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void PlayLine();
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/// Stop playing
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void Stop();
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DEFINE_SIGNAL_ADDERS(Seek, AddSeekListener)
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DEFINE_SIGNAL_ADDERS(VideoOpen, AddVideoOpenListener)
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DEFINE_SIGNAL_ADDERS(KeyframesOpen, AddKeyframesListener)
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DEFINE_SIGNAL_ADDERS(TimecodesOpen, AddTimecodesListener)
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DEFINE_SIGNAL_ADDERS(ARChange, AddARChangeListener)
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const std::vector<int>& GetKeyFrames() const { return keyFrames; };
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wxString GetKeyFramesName() const { return keyFramesFilename; }
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void LoadKeyframes(wxString filename);
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void SaveKeyframes(wxString filename);
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void CloseKeyframes();
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bool OverKeyFramesLoaded() const { return !keyFramesFilename.empty(); }
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bool KeyFramesLoaded() const { return !keyFrames.empty(); }
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wxString GetTimecodesName() const { return ovrTimecodeFile; }
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void LoadTimecodes(wxString filename);
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void SaveTimecodes(wxString filename);
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void CloseTimecodes();
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bool OverTimecodesLoaded() const { return ovrFPS.IsLoaded(); }
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bool TimecodesLoaded() const { return videoFPS.IsLoaded() || ovrFPS.IsLoaded(); };
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const agi::vfr::Framerate& FPS() const { return ovrFPS.IsLoaded() ? ovrFPS : videoFPS; }
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int TimeAtFrame(int frame, agi::vfr::Time type = agi::vfr::EXACT) const;
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int FrameAtTime(int time, agi::vfr::Time type = agi::vfr::EXACT) const;
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static VideoContext *Get();
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static void OnExit();
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};
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