psi.h

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/*****************************************************************************
 * psi.h
 * Copyright (C) 2001-2011 VideoLAN
 * $Id: psi.h,v 1.6 2002/04/02 17:55:30 bozo Exp $
 *
 * Authors: Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/
 
#ifndef _DVBPSI_PSI_H_
#define _DVBPSI_PSI_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*****************************************************************************
 * dvbpsi_psi_section_t
 *****************************************************************************/
struct dvbpsi_psi_section_s
{
  /* non-specific section data */
  uint8_t       i_table_id;             
  bool          b_syntax_indicator;     
  bool          b_private_indicator;    
  uint16_t      i_length;               
  /* used if b_syntax_indicator is true */
  uint16_t      i_extension;            
  uint8_t       i_version;              
  bool          b_current_next;         
  uint8_t       i_number;               
  uint8_t       i_last_number;          
  /* non-specific section data */
  /* the content is table-specific */
  uint8_t *     p_data;                 
  uint8_t *     p_payload_start;        
  uint8_t *     p_payload_end;          
  /* used if b_syntax_indicator is true */
  uint32_t      i_crc;                  
  /* list handling */
  struct dvbpsi_psi_section_s *         p_next;         
};
 
/*****************************************************************************
 * dvbpsi_NewPSISection
 *****************************************************************************/
dvbpsi_psi_section_t * dvbpsi_NewPSISection(int i_max_size);
 
/*****************************************************************************
 * dvbpsi_DeletePSISections
 *****************************************************************************/
void dvbpsi_DeletePSISections(dvbpsi_psi_section_t * p_section);
 
/*****************************************************************************
 * dvbpsi_CheckPSISection
 *****************************************************************************/
bool dvbpsi_CheckPSISection(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t *p_section,
                            const uint8_t table_id, const char *psz_table_name);
 
/*****************************************************************************
 * dvbpsi_ValidPSISection
 *****************************************************************************/
bool dvbpsi_ValidPSISection(dvbpsi_psi_section_t* p_section);
 
/*****************************************************************************
 * dvbpsi_BuildPSISection
 *****************************************************************************/
void dvbpsi_BuildPSISection(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_section);
 
/*****************************************************************************
 * dvbpsi_CalculateCRC32
 *****************************************************************************/
void dvbpsi_CalculateCRC32(dvbpsi_psi_section_t *p_section);
 
/*****************************************************************************
 * dvbpsi_has_CRC32
 *****************************************************************************/
static inline bool dvbpsi_has_CRC32(dvbpsi_psi_section_t *p_section)
{
    if ((p_section->i_table_id == (uint8_t) 0x70) /* TDT (has no CRC 32) */ ||
        (p_section->i_table_id == (uint8_t) 0x71) /* RST (has no CRC 32) */ ||
        (p_section->i_table_id == (uint8_t) 0x72) /*  ST (has no CRC 32) */ ||
        (p_section->i_table_id == (uint8_t) 0x7E))/* DIT (has no CRC 32) */
        return false;
 
    return (p_section->b_syntax_indicator || (p_section->i_table_id == 0x73));
}
 
#ifdef __cplusplus
};
#endif
 
#else
#error "Multiple inclusions of psi.h"
#endif