lib/dvb/subtitle.h

   1 #ifndef __lib_dvb_subtitle_h
   2 #define __lib_dvb_subtitle_h
   3
   4 #include <lib/base/object.h>
   5 #include <lib/dvb/idvb.h>
   6 #include <lib/dvb/pesparse.h>
   7 #include <lib/gdi/gpixmap.h>
   8
   9 typedef unsigned char __u8;
  10
  11 struct subtitle_clut_entry
  12 {
  13         __u8 Y, Cr, Cb, T;
  14 };
  15
  16 struct subtitle_clut
  17 {
  18         unsigned char clut_id;
  19         unsigned char size_2, size_4, size_8;
  20         unsigned char CLUT_version_number;
  21         struct subtitle_clut_entry entries_2bit[4];
  22         struct subtitle_clut_entry entries_4bit[16];
  23         struct subtitle_clut_entry entries_8bit[256];
  24         struct subtitle_clut *next;
  25 };
  26
  27 struct subtitle_page_region
  28 {
  29         int region_id;
  30         int region_horizontal_address;
  31         int region_vertical_address;
  32         struct subtitle_page_region *next;
  33 };
  34
  35 struct subtitle_region_object
  36 {
  37         int object_id;
  38         int object_type;
  39         int object_provider_flag;
  40
  41         int object_horizontal_position;
  42         int object_vertical_position;
  43
  44                 // not supported right now...
  45         int foreground_pixel_value;
  46         int background_pixel_value;
  47
  48         struct subtitle_region_object *next;
  49 };
  50
  51 struct subtitle_region
  52 {
  53         int region_id;
  54         int region_version_number;
  55         int region_height, region_width;
  56         enum depth { bpp2=1, bpp4=2, bpp8=3 } region_depth;
  57         ePtr<gPixmap> region_buffer;
  58
  59         int clut_id;
  60
  61         struct subtitle_region_object *region_objects;
  62
  63         struct subtitle_region *next;
  64 };
  65
  66 struct subtitle_page
  67 {
  68         int page_id;
  69         time_t page_time_out;
  70         int page_version_number;
  71         int pcs_size;
  72         struct subtitle_page_region *page_regions;
  73
  74         struct subtitle_region *regions;
  75
  76         struct subtitle_clut *cluts;
  77
  78         struct subtitle_page *next;
  79 };
  80
  81 struct bitstream
  82 {
  83         __u8 *data;
  84         int size;
  85         int avail;
  86         int consumed;
  87 };
  88
  89 struct eDVBSubtitleRegion
  90 {
  91         pts_t show_time;
  92         int timeout;
  93         ePtr<gPixmap> region;
  94 };
  95
  96 class eDVBSubtitleParser
  97         :public iObject, public ePESParser, public Object
  98 {
  99         DECLARE_REF(eDVBSubtitleParser);
 100         struct subtitle_page *pages;
 101         int current_clut_id, current_clut_page_id;
 102         int screen_width, screen_height;
 103         int bbox_left, bbox_top, bbox_right, bbox_bottom;
 104         ePtr<iDVBPESReader> m_pes_reader;
 105         ePtr<eConnection> m_read_connection;
 106         pts_t show_time;
 107         Signal1<void,const eDVBSubtitleRegion&> m_new_subtitle_region;
 108 public:
 109         eDVBSubtitleParser(iDVBDemux *demux);
 110         virtual ~eDVBSubtitleParser();
 111         int start(int pid);
 112         void connectNewRegion(const Slot1<void, const eDVBSubtitleRegion&> &slot, ePtr<eConnection> &connection);
 113 private:
 114         void subtitle_process_line(struct subtitle_page *page, int object_id, int line, __u8 *data, int len);
 115         int subtitle_process_pixel_data(struct subtitle_page *page, int object_id, int *linenr, int *linep, __u8 *data);
 116         int subtitle_process_segment(__u8 *segment);
 117         void subtitle_process_pes(__u8 *buffer, int len);
 118         void subtitle_clear_screen();
 119         void subtitle_redraw_all();
 120         void subtitle_reset();
 121         void subtitle_redraw(int page_id);
 122         void processPESPacket(__u8 *pkt, int len) { subtitle_process_pes(pkt, len); }
 123 };
 124
 125 #endif