subtitle.h

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#ifndef __lib_dvb_subtitle_h
#define __lib_dvb_subtitle_h
 
#include <stdint.h>
#include <lib/base/object.h>
#include <lib/dvb/idvb.h>
#include <lib/dvb/pesparse.h>
#include <lib/gdi/gpixmap.h>
 
struct subtitle_clut_entry
{
  uint8_t Y, Cr, Cb, T;
  uint8_t valid;
};
 
struct subtitle_clut
{
  unsigned char clut_id;
  unsigned char CLUT_version_number;
  subtitle_clut_entry entries_2bit[4];
  subtitle_clut_entry entries_4bit[16];
  subtitle_clut_entry entries_8bit[256];
  subtitle_clut *next;
};
 
struct subtitle_page_region
{
  int region_id;
  int region_horizontal_address;
  int region_vertical_address;
  subtitle_page_region *next;
};
 
struct subtitle_region_object
{
  int object_id;
  int object_type;
  int object_provider_flag;
 
  int object_horizontal_position;
  int object_vertical_position;
 
    // not supported right now...
  int foreground_pixel_value;
  int background_pixel_value;
 
  subtitle_region_object *next;
};
 
struct subtitle_region
{
  int region_id;
  int version_number;
  int height, width;
  enum tDepth { bpp2=1, bpp4=2, bpp8=3 } depth;
 
  ePtr<gPixmap> buffer;
 
  int clut_id;
 
  subtitle_region_object *objects;
 
  subtitle_region *next;
 
  bool committed;
};
 
struct subtitle_page
{
  int page_id;
  time_t page_time_out;
  int page_version_number;
  int state;
  int pcs_size;
  subtitle_page_region *page_regions;
 
  subtitle_region *regions;
 
  subtitle_clut *cluts;
 
  subtitle_page *next;
};
 
struct bitstream
{
  uint8_t *data;
  int size;
  int avail;
  int consumed;
};
 
struct eDVBSubtitleRegion
{
  ePtr<gPixmap> m_pixmap;
  ePoint m_position;
  eDVBSubtitleRegion &operator=(const eDVBSubtitleRegion &s)
  {
    m_pixmap = s.m_pixmap;
    m_position = s.m_position;
    return *this;
  }
};
 
struct eDVBSubtitlePage
{
  std::list<eDVBSubtitleRegion> m_regions;
  pts_t m_show_time;
  eSize m_display_size;
};
 
class eDVBSubtitleParser
  :public iObject, public ePESParser, public sigc::trackable
{
  DECLARE_REF(eDVBSubtitleParser);
  subtitle_page *m_pages;
  ePtr<iDVBPESReader> m_pes_reader;
  ePtr<eConnection> m_read_connection;
  pts_t m_show_time;
  sigc::signal1<void,const eDVBSubtitlePage&> m_new_subtitle_page;
  int m_composition_page_id, m_ancillary_page_id;
  bool m_seen_eod;
  eSize m_display_size;
public:
  eDVBSubtitleParser(iDVBDemux *demux);
  virtual ~eDVBSubtitleParser();
  int start(int pid, int composition_page_id, int ancillary_page_id);
  int stop();
  void connectNewPage(const sigc::slot1<void, const eDVBSubtitlePage&> &slot, ePtr<eConnection> &connection);
private:
  void subtitle_process_line(subtitle_region *region, subtitle_region_object *object, int line, uint8_t *data, int len);
  int subtitle_process_pixel_data(subtitle_region *region, subtitle_region_object *object, int *linenr, int *linep, uint8_t *data);
  int subtitle_process_segment(uint8_t *segment);
  void subtitle_process_pes(uint8_t *buffer, int len);
  void subtitle_redraw_all();
  void subtitle_reset();
  void subtitle_redraw(int page_id);
  void processPESPacket(uint8_t *pkt, int len) { subtitle_process_pes(pkt, len); }
};
 
#endif