mhi.h

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#ifndef _MHI_H_
#define _MHI_H_

// Misc header
#include <ft2build.h>
#include FT_FREETYPE_H

// STL headers
#include <list>
#include <vector>
using namespace std;

// Qt headers
#include <QWaitCondition>
#include <QRunnable>
#include <QString>
#include <QMutex>
#include <QImage>

// MythTV headers
#include "../libmythfreemheg/freemheg.h"
#include "interactivetv.h"
#include "dsmcc.h"
#include "mythcontext.h"
#include "mythdbcon.h"
#include "mythdeque.h"
#include "mthread.h"

extern "C" {
#include "libavcodec/avcodec.h" // to decode single MPEG I-frames
}

class MythPainter;
class InteractiveScreen;
class DSMCCPacket;
class MHIImageData;
class MHIContext;

class MHIContext : public MHContext, public QRunnable
{
  public:
    MHIContext(InteractiveTV *parent);
    virtual ~MHIContext();

    void QueueDSMCCPacket(unsigned char *data, int length, int componentTag,
        unsigned carouselId, int dataBroadcastId);
    // A NetworkBootInfo sub-descriptor is present in the PMT.
    void SetNetBootInfo(const unsigned char *data, uint length);
    void Restart(int chanid, int sourceid, bool isLive);
    // Offer a key press.  Returns true if it accepts it.
    // This will depend on the current profile.
    bool OfferKey(QString key);
    void UpdateOSD(InteractiveScreen *osdWindow, MythPainter *osdPainter);
    void Reinit(const QRect &display);

    void StopEngine(void);

    // Test for an object in the carousel.
    // Returns true if the object is present and
    // so a call to GetCarouselData will not block and will return the data.
    // Returns false if the object is not currently present because it has not
    // yet appeared and also if it is not present in the containing directory.
    virtual bool CheckCarouselObject(QString objectPath);

    // Get an object from the carousel.  Returns true and sets the data if
    // it was able to retrieve the named object.  Blocks if the object seems
    // to be present but has not yet appeared.  Returns false if the object
    // cannot be retrieved.
    virtual bool GetCarouselData(QString objectPath, QByteArray &result);

    // Set the input register.  This sets the keys that are to be handled
    // by MHEG.  Flushes the key queue.
    virtual void SetInputRegister(int nReg);

    virtual void RequireRedraw(const QRegion &region);

    virtual bool CheckStop(void) { return m_stop; }

    void GetInitialStreams(int &audioTag, int &videoTag);

    virtual MHDLADisplay *CreateDynamicLineArt(
        bool isBoxed, MHRgba lineColour, MHRgba fillColour);
    virtual MHTextDisplay *CreateText(void);
    virtual MHBitmapDisplay *CreateBitmap(bool tiling);
    virtual void DrawRect(int xPos, int yPos, int width, int height,
                          MHRgba colour);
    virtual void DrawBackground(const QRegion &reg);
    virtual void DrawVideo(const QRect &videoRect, const QRect &displayRect);

    void DrawImage(int x, int y, const QRect &rect, const QImage &image);

    virtual int GetChannelIndex(const QString &str);
    virtual bool GetServiceInfo(int channelId, int &netId, int &origNetId,
                                int &transportId, int &serviceId);
    virtual bool TuneTo(int channel, int tuneinfo);

    virtual bool BeginAudio(const QString &stream, int tag);
    virtual void StopAudio(void);
    virtual bool BeginVideo(const QString &stream, int tag);
    virtual void StopVideo(void);

    // Get the context id strings.  The format of these strings is specified
    // by the UK MHEG profile.
    virtual const char *GetReceiverId(void)
        { return "MYT001001"; } // Version number?
    virtual const char *GetDSMCCId(void)
        { return "DSMMYT001"; } // DSMCC version.

    // Operations used by the display classes
    // Add an item to the display vector
    void AddToDisplay(const QImage &image, int x, int y);

    FT_Face GetFontFace(void) { return m_face; }
    bool IsFaceLoaded(void) { return m_face_loaded; }
    bool LoadFont(QString name);
    bool ImageUpdated(void) { return m_updated; }

    static const int StdDisplayWidth = 720;
    static const int StdDisplayHeight = 576;
    int GetWidth(void) { return m_displayWidth; }
    int GetHeight(void) { return m_displayHeight; }

  protected:
    void run(void); // QRunnable
    void ProcessDSMCCQueue(void);
    void NetworkBootRequested(void);
    void ClearDisplay(void);
    void ClearQueue(void);

    InteractiveTV   *m_parent;

    Dsmcc           *m_dsmcc;  // Pointer to the DSMCC object carousel.
    QMutex           m_dsmccLock;
    MythDeque<DSMCCPacket*> m_dsmccQueue;

    QMutex           m_keyLock;
    MythDeque<int>   m_keyQueue;
    int              m_keyProfile;

    MHEG            *m_engine; // Pointer to the MHEG engine

    mutable QMutex   m_runLock;
    QWaitCondition   m_engine_wait; // protected by m_runLock
    bool             m_stop;        // protected by m_runLock
    QMutex           m_display_lock;
    bool             m_updated;
    int              m_displayWidth;
    int              m_displayHeight;
    float            m_xScale;
    float            m_yScale;

    list<MHIImageData*> m_display; // List of items to display

    FT_Face          m_face;
    bool             m_face_loaded;

    MThread         *m_engineThread;

    int              m_currentChannel;
    int              m_currentStream;
    bool             m_isLive;
    int              m_currentSource;

    int              m_audioTag;
    int              m_videoTag;
    QList<int>       m_tuneinfo;

    uint             m_lastNbiVersion;
    vector<unsigned char> m_nbiData;

    QRect            m_videoRect;
    QRect            m_displayRect;
};

// Object for drawing text.
class MHIText : public MHTextDisplay
{
  public:
    MHIText(MHIContext *parent);
    virtual ~MHIText() {}

    virtual void Draw(int x, int y);
    virtual void Clear(void);
    virtual void AddText(int x, int y, const QString &, MHRgba colour);

    virtual void SetSize(int width, int height);
    virtual void SetFont(int size, bool isBold, bool isItalic);

    virtual QRect GetBounds(const QString &str, int &strLen, int maxSize = -1);

  public:
    MHIContext *m_parent;
    QImage      m_image;
    int         m_fontsize;
    bool        m_fontItalic;
    bool        m_fontBold;
    int         m_width;
    int         m_height;
};

class MHIBitmap : public MHBitmapDisplay
{
  public:
    MHIBitmap(MHIContext *parent, bool tiled)
        : m_parent(parent), m_tiled(tiled), m_opaque(false) {}
    virtual ~MHIBitmap() {}

    virtual void CreateFromPNG(const unsigned char *data, int length);

    virtual void CreateFromMPEG(const unsigned char *data, int length);

    virtual void Draw(int x, int y, QRect rect, bool tiled);

    virtual void ScaleImage(int newWidth, int newHeight);

    // Gets
    virtual QSize GetSize(void) { return m_image.size(); }
    virtual bool IsOpaque(void) { return !m_image.isNull() && m_opaque; }

  public:
    MHIContext *m_parent;
    bool        m_tiled;
    QImage      m_image;
    bool        m_opaque;
};

class MHIDLA : public MHDLADisplay
{
  public:
    MHIDLA(MHIContext *parent, bool isBoxed,
           MHRgba lineColour, MHRgba fillColour)
        : m_parent(parent),            m_width(0),
          m_height(0),                 m_boxed(isBoxed),
          m_boxLineColour(lineColour), m_boxFillColour(fillColour),
          m_lineWidth(0) {}
    virtual void Draw(int x, int y);
    virtual void SetSize(int width, int height)
    {
        m_width  = width;
        m_height = height;
        Clear();
    }
    virtual void SetLineSize(int width)       { m_lineWidth = width;   }
    virtual void SetLineColour(MHRgba colour) { m_lineColour = colour; }
    virtual void SetFillColour(MHRgba colour) { m_fillColour = colour; }

    virtual void Clear(void);

    // add items to the drawing.
    virtual void DrawLine(int x1, int y1, int x2, int y2);
    virtual void DrawBorderedRectangle(int x, int y, int width, int height);
    virtual void DrawOval(int x, int y, int width, int height);
    virtual void DrawArcSector(int x, int y, int width, int height,
                               int start, int arc, bool isSector);
    virtual void DrawPoly(bool isFilled, int nPoints, const int *xArray, const int *yArray);

  protected:
    void DrawRect(int x, int y, int width, int height, MHRgba colour);
    void DrawLineSub(int x1, int y1, int x2, int y2, bool swapped);

  protected:
    MHIContext *m_parent;
    QImage      m_image;
    int         m_width;         
    int         m_height;        
    bool        m_boxed;         
    MHRgba      m_boxLineColour; 
    MHRgba      m_boxFillColour; 
    MHRgba      m_lineColour;    
    MHRgba      m_fillColour;    
    int         m_lineWidth;     
};

class DSMCCPacket
{
  public:
    DSMCCPacket(unsigned char *data, int length, int tag,
                unsigned car, int dbid)
        : m_data(data),           m_length(length),
          m_componentTag(tag),    m_carouselId(car),
          m_dataBroadcastId(dbid)
    {
    }

    ~DSMCCPacket()
    {
        free(m_data);
    }

  public:
    unsigned char *m_data;
    int            m_length;
    int            m_componentTag;
    unsigned       m_carouselId;
    int            m_dataBroadcastId;
};

#endif // _MHI_H_

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