libdvbpsi  1.3.0
psi.h
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00001 /*****************************************************************************
00002  * psi.h
00003  * Copyright (C) 2001-2011 VideoLAN
00004  * $Id: psi.h,v 1.6 2002/04/02 17:55:30 bozo Exp $
00005  *
00006  * Authors: Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr>
00007  *
00008  * This library is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * This library is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with this library; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00021  *
00022  *****************************************************************************/
00023 
00032 #ifndef _DVBPSI_PSI_H_
00033 #define _DVBPSI_PSI_H_
00034 
00035 #ifdef __cplusplus
00036 extern "C" {
00037 #endif
00038 
00039 /*****************************************************************************
00040  * dvbpsi_psi_section_t
00041  *****************************************************************************/
00068 struct dvbpsi_psi_section_s
00069 {
00070   /* non-specific section data */
00071   uint8_t       i_table_id;             
00072   bool          b_syntax_indicator;     
00073   bool          b_private_indicator;    
00074   uint16_t      i_length;               
00076   /* used if b_syntax_indicator is true */
00077   uint16_t      i_extension;            
00080   uint8_t       i_version;              
00081   bool          b_current_next;         
00082   uint8_t       i_number;               
00083   uint8_t       i_last_number;          
00085   /* non-specific section data */
00086   /* the content is table-specific */
00087   uint8_t *     p_data;                 
00088   uint8_t *     p_payload_start;        
00089   uint8_t *     p_payload_end;          
00091   /* used if b_syntax_indicator is true */
00092   uint32_t      i_crc;                  
00094   /* list handling */
00095   struct dvbpsi_psi_section_s *         p_next;         
00097 };
00098 
00099 /*****************************************************************************
00100  * dvbpsi_NewPSISection
00101  *****************************************************************************/
00108 dvbpsi_psi_section_t * dvbpsi_NewPSISection(int i_max_size);
00109 
00110 /*****************************************************************************
00111  * dvbpsi_DeletePSISections
00112  *****************************************************************************/
00119 void dvbpsi_DeletePSISections(dvbpsi_psi_section_t * p_section);
00120 
00121 /*****************************************************************************
00122  * dvbpsi_CheckPSISection
00123  *****************************************************************************/
00135 bool dvbpsi_CheckPSISection(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t *p_section,
00136                             const uint8_t table_id, const char *psz_table_name);
00137 
00138 /*****************************************************************************
00139  * dvbpsi_ValidPSISection
00140  *****************************************************************************/
00150 bool dvbpsi_ValidPSISection(dvbpsi_psi_section_t* p_section);
00151 
00152 /*****************************************************************************
00153  * dvbpsi_BuildPSISection
00154  *****************************************************************************/
00162 void dvbpsi_BuildPSISection(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_section);
00163 
00164 /*****************************************************************************
00165  * dvbpsi_CalculateCRC32
00166  *****************************************************************************/
00175 void dvbpsi_CalculateCRC32(dvbpsi_psi_section_t *p_section);
00176 
00177 /*****************************************************************************
00178  * dvbpsi_has_CRC32
00179  *****************************************************************************/
00188 static inline bool dvbpsi_has_CRC32(dvbpsi_psi_section_t *p_section)
00189 {
00190     if ((p_section->i_table_id == (uint8_t) 0x70) /* TDT (has no CRC 32) */ ||
00191         (p_section->i_table_id == (uint8_t) 0x71) /* RST (has no CRC 32) */ ||
00192         (p_section->i_table_id == (uint8_t) 0x72) /*  ST (has no CRC 32) */ ||
00193         (p_section->i_table_id == (uint8_t) 0x7E))/* DIT (has no CRC 32) */
00194         return false;
00195 
00196     return (p_section->b_syntax_indicator || (p_section->i_table_id == 0x73));
00197 }
00198 
00199 #ifdef __cplusplus
00200 };
00201 #endif
00202 
00203 #else
00204 #error "Multiple inclusions of psi.h"
00205 #endif
00206