include/lib/dvb/pvrparse.h

   1 #ifndef __include_lib_dvb_pvrparse_h
   2 #define __include_lib_dvb_pvrparse_h
   3
   4 #include <map>
   5 #include <set>
   6
   7         /* This module parses TS data and collects valuable information  */
   8         /* about it, like PTS<->offset correlations and sequence starts. */
   9
  10         /* At first, we define the collector class: */
  11 class eMPEGStreamInformation
  12 {
  13 public:
  14         typedef unsigned long long Timestamp;
  15         typedef unsigned long long off_t;
  16                 /* we order by off_t here, since the timestamp may */
  17                 /* wrap around. */
  18                 /* we only record sequence start's pts values here. */
  19         std::map<off_t, Timestamp> accessPoints;
  20                 /* timestampDelta is in fact the difference between */
  21                 /* the PTS in the stream and a real PTS from 0..max */
  22         std::map<off_t, Timestamp> timestampDeltas;
  23
  24         int save(const char *filename);
  25         int load(const char *filename);
  26
  27                 /* recalculates timestampDeltas */
  28         void fixupDiscontinuties();
  29
  30                 /* get delta at specific offset */
  31         Timestamp getDelta(off_t offset);
  32
  33                 /* inter/extrapolate timestamp from offset */
  34         Timestamp getInterpolated(off_t offset);
  35
  36         off_t getAccessPoint(Timestamp ts);
  37
  38         operator bool();
  39 };
  40
  41         /* Now we define the parser's state: */
  42 class eMPEGStreamParserTS
  43 {
  44         eMPEGStreamInformation &streaminfo;
  45         unsigned char pkt[188];
  46         int pktptr;
  47         int processPacket(const unsigned char *pkt, eMPEGStreamInformation::off_t offset);
  48         inline int wantPacket(const unsigned char *hdr) const;
  49         int pid;
  50         int needNextPacket;
  51         int skip;
  52 public:
  53         eMPEGStreamParserTS(eMPEGStreamInformation &streaminfo);
  54         void parseData(eMPEGStreamInformation::off_t offset, const void *data, unsigned int len);
  55         void setPid(int pid);
  56 };
  57
  58 #endif