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126 lines
4.4 KiB
126 lines
4.4 KiB
/*****************************************************************************
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* bat.h: ETSI EN 300 468 Bouquet Association Table (BAT)
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*****************************************************************************
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* Copyright (C) 2009-2010 VideoLAN
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Georgi Chorbadzhiyski <georgi@unixsol.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_BAT_H__
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#define __BITSTREAM_DVB_BAT_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/psi.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#include <bitstream/dvb/si/nit.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*****************************************************************************
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* Bouquet Association Table
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*****************************************************************************/
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#define BAT_PID 0x11
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#define BAT_TABLE_ID 0x4a
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#define BAT_HEADER_SIZE (PSI_HEADER_SIZE_SYNTAX1 + 2)
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#define BAT_HEADER2_SIZE 2
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#define BAT_TS_SIZE 6
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#define bat_set_bouquet_id psi_set_tableidext
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#define bat_get_bouquet_id psi_get_tableidext
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static inline void bat_init(uint8_t *p_bat)
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{
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psi_init(p_bat, true);
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psi_set_tableid(p_bat, BAT_TABLE_ID);
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p_bat[8] = 0xf0;
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}
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#define bat_set_length nit_set_length
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#define bat_set_desclength nit_set_desclength
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#define bat_get_desclength nit_get_desclength
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#define bat_get_descs nit_get_descs
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#define bath_init nith_init
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#define bath_set_tslength nith_set_tslength
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#define bath_get_tslength nith_get_tslength
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#define bat_get_header2 nit_get_header2
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#define batn_init nitn_init
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#define batn_set_tsid nitn_set_tsid
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#define batn_get_tsid nitn_get_tsid
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#define batn_set_onid nitn_set_onid
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#define batn_get_onid nitn_get_onid
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#define batn_set_desclength nitn_set_desclength
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#define batn_get_desclength nitn_get_desclength
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#define batn_get_descs nitn_get_descs
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#define bat_get_ts nit_get_ts
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#define bat_validate_ts nit_validate_ts
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#define bat_table_find_ts nit_table_find_ts
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#define bat_table_validate nit_table_validate
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static inline bool bat_validate(const uint8_t *p_bat)
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{
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uint16_t i_section_size = psi_get_length(p_bat) + PSI_HEADER_SIZE
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- PSI_CRC_SIZE;
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const uint8_t *p_bat_n;
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if (!psi_get_syntax(p_bat) || psi_get_tableid(p_bat) != BAT_TABLE_ID)
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return false;
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if (i_section_size < BAT_HEADER_SIZE
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|| i_section_size < BAT_HEADER_SIZE + bat_get_desclength(p_bat))
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return false;
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if (!descs_validate(p_bat + 8))
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return false;
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p_bat_n = p_bat + BAT_HEADER_SIZE + bat_get_desclength(p_bat);
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if (bath_get_tslength(p_bat_n) != p_bat + i_section_size - p_bat_n
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- BAT_HEADER2_SIZE)
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return false;
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p_bat_n += BAT_HEADER2_SIZE;
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while (p_bat_n + BAT_TS_SIZE - p_bat <= i_section_size
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&& p_bat_n + BAT_TS_SIZE + batn_get_desclength(p_bat_n) - p_bat
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<= i_section_size) {
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if (!descs_validate(p_bat_n + 4))
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return false;
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p_bat_n += BAT_TS_SIZE + batn_get_desclength(p_bat_n);
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}
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return (p_bat_n - p_bat == i_section_size);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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