page_magick.h

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/*
* page_magick.h -- FX Page
* Copyright (C) 2002 Charles Yates <charles.yates@pandora.be>
* Copyright (C) 2002-2007 Dan Dennedy <dan@dennedy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef _PAGE_MAGICK_H
#define _PAGE_MAGICK_H

#include "image_create.h"
#include "image_filters.h"
#include "image_transitions.h"
#include "audio_filters.h"
#include "audio_transitions.h"
#include "kino_common.h"
#include "page.h"
#include "oss.h"
#include "kino_extra.h"

class Plugin
{
private:
    void *ptr;

public:
    bool Open( char *file );
    void Close( );
    void *Find( char *symbol );
    const char *GetError( );
};

class PluginCollection
{
private:
    vector < Plugin * > collection;

public:
    PluginCollection( );
    ~PluginCollection( );
    void Initialise( char *directory );
    void RegisterPlugin( char *filename );
    unsigned int Count();
    Plugin *Get( unsigned int index );
};

class PluginImageCreateRepository : public GDKImageCreateRepository
{
public:
    void InstallPlugins( Plugin * );
};

class PluginImageFilterRepository : public GDKImageFilterRepository
{
public:
    void InstallPlugins( Plugin * );
};

class PluginImageTransitionRepository : public GDKImageTransitionRepository
{
public:
    void InstallPlugins( Plugin * );
};

class PluginAudioFilterRepository : public GDKAudioFilterRepository
{
public:
    void InstallPlugins( Plugin * );
};

class PluginAudioTransitionRepository : public GDKAudioTransitionRepository
{
public:
    void InstallPlugins( Plugin * );
};

class PageMagick : public Page, public KeyFrameController
{
public:
    PageMagick( KinoCommon *common );
    virtual ~PageMagick();

    // Page interface implementation
    void newFile();
    void start();
    gulong activate();
    void clean();
    void selectScene( int );
    void videoStartOfMovie();
    void videoBack(int step = -1);
    void videoPlay();
    void videoForward(int step = 1);
    void videoEndOfMovie();
    void videoPause();
    void videoStop();
    void videoPreviousScene();
    void videoNextScene();
    void videoStartOfScene()
        { videoPreviousScene(); }
    void videoEndOfScene()
        { videoNextScene(); }
    void showFrameInfo( int frame_number );
    void showFrameInfo( int frame_number, int duration );
    void movedToFrame( int frame_number );
    void windowMoved();
    void timeFormatChanged();
    gboolean processKeyboard( GdkEventKey *event );
    gboolean processCommand( char *cmd );
    std::string getHelpPage()
    {
        return "FX";
    }

    // PageMagick methods
    void PreviewFrame();
    void StartPreview();
    void AudioThread();
    void VideoThread();
    void StartRender();
    void Stop();
    void StopPreview();
    void UpdateProgress( gfloat );
    void UpdateStatus( int currentFrame, int begin, int end, int every );
    void RefreshStatus( bool with_fx_notify = false );

    // PageMagick accessors
    GDKImageCreate *GetImageCreate() const;
    GDKImageFilter *GetImageFilter() const;
    GDKImageTransition *GetImageTransition() const;
    GDKAudioFilter *GetAudioFilter() const;
    GDKAudioTransition *GetAudioTransition() const;
    GtkWidget* GetWindow() const
    {
        return window;
    }
    bool IsRepainting() const
    {
        return repainting;
    }
    bool IsPreviewing() const
    {
        return previewing;
    }
    void SetKeyFrameControllerClient( KeyFrameControllerClient* client )
    {
        keyFrameControllerClient = client;
    }

    // KeyFrameController methods
    void ShowCurrentStatus( double position, frame_type type, bool hasPrev, bool hasNext );
    double GetCurrentPosition( );

    // KeyFrameController callbacks
    void OnKeyFrameControllerKeyChanged( GtkToggleButton* togglebutton );

    // Used by signal handlers
    void OnTimeRangeChanged();
    GtkWidget *window;

private:
    // Imported
    KinoCommon *common;

    int last_page;
    bool rendering;
    bool paused;
    bool previewing;
    bool repainting;
    GtkProgressBar *progressBar;
    char status[ 10240 ];
    int previewPosition;
    GtkWidget *scrubBar;
    GtkAdjustment *scrubAdjustment;

    // Filters and Transitions
    PluginImageCreateRepository image_creators;
    PluginImageFilterRepository image_filters;
    PluginImageTransitionRepository image_transitions;
    PluginAudioFilterRepository audio_filters;
    PluginAudioTransitionRepository audio_transitions;

    // audio structures
    kino_sound_t *audio_device;
    dv_audio_t dv_audio;
    bool audio_device_avail;
    gint audio_sampling_rate;
    void PlayAudio( int16_t *buffers[], int, int, int, bool );

    // Video structures
    void ShowImage( GtkWidget *area, uint8_t *pixels, int, int, bool );

    PluginCollection plugins;
    string last_fx_file;
    double startTime;
    double pauseTime;
    double nextUpdateTime;
    KeyFrameControllerClient* keyFrameControllerClient;
    bool isGuiLocked;
    bool isPreviousScene;
    bool isNextScene;
    double newPosition;
};

#endif

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