lowlevel/eit.h

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/*
 * EVENT INFORMATION TABLE
 *
 * Copyright (C) 1998  Thomas Mirlacher
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * The author may be reached as dent@cosy.sbg.ac.at, or
 * Thomas Mirlacher, Jakob-Haringerstr. 2, A-5020 Salzburg,
 * Austria
 *
 *------------------------------------------------------------
 *
 */
 
#ifndef __EIT_H__
#define __EIT_H__
 
// Service Description Section
#include <sys/types.h>
 
typedef struct {
  u_char  table_id      : 8;
 
#if BYTE_ORDER == BIG_ENDIAN
  u_char  section_syntax_indicator  : 1;
  u_char          : 3;
  u_char  section_length_hi   : 4;
#else
  u_char  section_length_hi   : 4;
  u_char          : 3;
  u_char  section_syntax_indicator  : 1;
#endif
 
  u_char  section_length_lo   : 8;
 
  u_char  service_id_hi     : 8;
  u_char  service_id_lo     : 8;
 
#if BYTE_ORDER == BIG_ENDIAN
  u_char          : 2;
  u_char  version_number      : 5;
  u_char  current_next_indicator    : 1;
#else
  u_char  current_next_indicator    : 1;
  u_char  version_number      : 5;
  u_char          : 2;
#endif
 
  u_char  section_number      : 8;
  u_char  last_section_number   : 8;
  u_char  transport_stream_id_hi    : 8;
  u_char  transport_stream_id_lo    : 8;
  u_char  original_network_id_hi    : 8;
  u_char  original_network_id_lo    : 8;
  u_char  segment_last_section_number : 8;
  u_char  segment_last_table_id   : 8;
 
  int getSectionLength() const     { return section_length_hi << 8 | section_length_lo; };
  int getServiceID() const         { return service_id_hi << 8 | service_id_lo; };
  int getTransportStreamId() const { return transport_stream_id_hi << 8 | transport_stream_id_lo; };
  int getOriginalNetworkId() const { return original_network_id_hi << 8 | original_network_id_lo; };
 
  void setSectionLength(int length)  { section_length_hi = length >> 8; section_length_lo = length & 0xFF; };
  void setServiceId(int serviceId)   { service_id_hi = serviceId >> 8; service_id_lo = serviceId & 0xFF; };
  void setTransportStreamId(int tsi) { transport_stream_id_hi = tsi >> 8; transport_stream_id_lo = tsi & 0xFF; };
  void setOriginalNetworkId(int oni) { original_network_id_hi = oni >> 8; original_network_id_lo = oni & 0xFF; };
} eit_t;
 
#define EIT_SIZE 14
 
struct eit_loop_struct1 {
  u_char  service_id_hi     : 8;
  u_char  service_id_lo     : 8;
 
#if BYTE_ORDER == BIG_ENDIAN
  u_char          : 6;
  u_char  eit_schedule_flag   : 1;
  u_char  eit_present_following_flag  : 1;
 
  u_char  running_status      : 3;
  u_char  free_ca_mode      : 1;
  u_char  descriptors_loop_length_hi  : 4;
#else
  u_char  eit_present_following_flag  : 1;
  u_char  eit_schedule_flag   : 1;
  u_char          : 6;
 
  u_char  descriptors_loop_length_hi  : 4;
  u_char  free_ca_mode      : 1;
  u_char  running_status      : 3;
#endif
 
  u_char  descriptors_loop_length_lo  : 8;
};
 
#define EIT_SHORT_EVENT_DESCRIPTOR 0x4d
#define EIT_SHORT_EVENT_DESCRIPTOR_SIZE 6
 
struct eit_short_event_descriptor_struct {
  u_char  descriptor_tag      : 8;
  u_char  descriptor_length   : 8;
 
  u_char  language_code_1     : 8;
  u_char  language_code_2     : 8;
  u_char  language_code_3     : 8;
 
  u_char  event_name_length   : 8;
};
 
#define EIT_EXTENDED_EVENT_DESCRIPOR 0x4e
#define EIT_EXTENDED_EVENT_DESCRIPTOR_SIZE 6
 
typedef struct eit_event_struct {
  u_char  event_id_hi     : 8;
  u_char  event_id_lo     : 8;
 
  u_char  start_time_1      : 8;
  u_char  start_time_2      : 8;
  u_char  start_time_3      : 8;
  u_char  start_time_4      : 8;
  u_char  start_time_5      : 8;
 
  u_char  duration_1      : 8;
  u_char  duration_2      : 8;
  u_char  duration_3      : 8;
 
#if BYTE_ORDER == BIG_ENDIAN
  u_char  running_status      : 3;
  u_char  free_CA_mode      : 1;
  u_char  descriptors_loop_length_hi  : 4;
#else
  u_char  descriptors_loop_length_hi  : 4;
  u_char  free_CA_mode      : 1;
  u_char  running_status      : 3;
#endif
 
  u_char  descriptors_loop_length_lo  : 8;
 
  uint16_t getEventId() const          { return event_id_hi << 8 | event_id_lo; };
  int getDescriptorsLoopLength() const { return descriptors_loop_length_hi << 8 | descriptors_loop_length_lo; };
 
  void setEventId(uint16_t eventId)      { event_id_hi = eventId >> 8; event_id_lo = eventId & 0xFF; };
  void setDescriptorsLoopLength(int dll) { descriptors_loop_length_hi = dll >> 8; descriptors_loop_length_lo = dll & 0xFF; };
 
} eit_event_t;
#define EIT_LOOP_SIZE 12
 
#define EIT_EXTENDED_EVENT_DESCRIPOR 0x4e
 
struct eit_extended_descriptor_struct {
  u_char descriptor_tag : 8;
  u_char descriptor_length : 8;
#if BYTE_ORDER == BIG_ENDIAN
  u_char descriptor_number : 4;
  u_char last_descriptor_number : 4;
#else
  u_char last_descriptor_number : 4;
  u_char descriptor_number : 4;
#endif
  u_char iso_639_2_language_code_1 : 8;
  u_char iso_639_2_language_code_2 : 8;
  u_char iso_639_2_language_code_3 : 8;
};
 
 
#endif