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102 lines
3.2 KiB
102 lines
3.2 KiB
/*****************************************************************************
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* tot.h: ETSI EN 300 468 Time Offset Table (TOT)
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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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*
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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_TOT_H__
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#define __BITSTREAM_DVB_TOT_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/tdt.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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* Time Offset Table
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*****************************************************************************/
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#define TOT_PID 0x14
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#define TOT_TABLE_ID 0x73
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#define TOT_HEADER_SIZE (PSI_HEADER_SIZE + 7)
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#define tot_set_utc tdt_set_utc
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#define tot_get_utc tdt_get_utc
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static inline void tot_init(uint8_t *p_tot)
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{
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psi_init(p_tot, false);
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psi_set_tableid(p_tot, TOT_TABLE_ID);
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p_tot[8] = 0xf0;
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}
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static inline void tot_set_desclength(uint8_t *p_tot, uint16_t i_length)
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{
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p_tot[8] &= ~0xf;
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p_tot[8] |= i_length >> 8;
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p_tot[9] = i_length & 0xff;
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}
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static inline uint16_t tot_get_desclength(const uint8_t *p_tot)
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{
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return ((p_tot[8] & 0xf) << 8) | p_tot[9];
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}
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static inline bool tot_validate(const uint8_t *p_tot)
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{
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uint16_t i_section_size = psi_get_length(p_tot) + PSI_HEADER_SIZE;
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uint8_t i_tid = psi_get_tableid(p_tot);
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if (psi_get_syntax(p_tot) || i_tid != TOT_TABLE_ID
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|| i_section_size < TOT_HEADER_SIZE + PSI_CRC_SIZE)
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return false;
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/* TOT is a syntax0 table with CRC */
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if (!psi_check_crc(p_tot))
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return false;
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if (i_section_size < TOT_HEADER_SIZE
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|| i_section_size < TOT_HEADER_SIZE + tot_get_desclength(p_tot))
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return false;
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if (!descs_validate(p_tot + 8))
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return false;
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return true;
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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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