mkvtoolnix/r_ogm.h

/*
  mkvmerge -- utility for splicing together matroska files
      from component media subtypes

  r_ogm.h

  Written by Moritz Bunkus <moritz@bunkus.org>

  Distributed under the GPL
  see the file COPYING for details
  or visit http://www.gnu.org/copyleft/gpl.html
*/

/*!
    \file
    \version \$Id: r_ogm.h,v 1.6 2003/03/03 23:20:44 mosu Exp $
    \brief class definitions for the OGG media stream reader
    \author Moritz Bunkus         <moritz @ bunkus.org>
*/

#ifndef __R_OGM_H
#define __R_OGM_H

#include <stdio.h>

#include <ogg/ogg.h>

#include "common.h"
#include "pr_generic.h"

#define OGM_STREAM_TYPE_UNKNOWN 0
#define OGM_STREAM_TYPE_VORBIS  1
#define OGM_STREAM_TYPE_VIDEO   2
#define OGM_STREAM_TYPE_PCM     3
#define OGM_STREAM_TYPE_MP3     4
#define OGM_STREAM_TYPE_AC3     5
#define OGM_STREAM_TYPE_TEXT    6

typedef struct {
  ogg_stream_state      os;
  generic_packetizer_c *packetizer;
  int                   sid;
  int                   stype;
  int                   eos;
  int                   serial;
  int                   units_processed;
  int                   num_packets;
  int                   packet_sizes[3];
  void                 *packet_data[3];
  int                   vorbis_rate;
} ogm_demuxer_t;

class ogm_reader_c: public generic_reader_c {
private:
  ogg_sync_state    oy;
  unsigned char    *astreams, *vstreams, *tstreams;
  FILE             *file;
  char             *filename;
  int               act_wchar;
  ogm_demuxer_t   **sdemuxers;
  int               num_sdemuxers;
  int               nastreams, nvstreams, ntstreams, numstreams;
  audio_sync_t      async;
  range_t           range;
  char            **comments;
  char             *fourcc;
  int               o_eos, bos_pages_read;
     
public:
  ogm_reader_c(char *fname, unsigned char *astreams,
               unsigned char *vstreams, unsigned char *tstreams,
               audio_sync_t *nasync, range_t *nrange, char *nfourcc)
    throw (error_c);
  virtual ~ogm_reader_c();

  virtual int                   read();
  virtual packet_t             *get_packet();

  virtual int                   display_priority();
  virtual void                  display_progress();
  
  virtual void                  overwrite_eos(int no_eos);
  virtual generic_packetizer_c *set_packetizer(generic_packetizer_c *np);
  
  static int                    probe_file(FILE *file, u_int64_t size);
    
private:
  virtual ogm_demuxer_t        *find_demuxer(int serialno);
  virtual int                   demuxing_requested(unsigned char *, int);
  virtual int                   read_page(ogg_page *);
  virtual void                  add_new_demuxer(ogm_demuxer_t *);
  virtual void                  handle_new_stream(ogg_page *);
  virtual void                  process_page(ogg_page *);
  virtual int                   packet_available();
  virtual int                   read_headers();
  virtual void                  process_header_page(ogg_page *);
  virtual void                  create_packetizers();
  virtual void                  free_demuxer(int);
};


#endif  // __R_OGM_H