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95 lines
3.3 KiB
95 lines
3.3 KiB
/*****************************************************************************
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* tsdt.h: ISO/IEC 13818-1 Transport stream descriptor table (TSDT)
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*****************************************************************************
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* Copyright (C) 2011 Unix Solutions Ltd.
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*
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* Authors: 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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* - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
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*/
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#ifndef __BITSTREAM_MPEG_TSDT_H__
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#define __BITSTREAM_MPEG_TSDT_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/mpeg/psi/cat.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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* Transport stream descriptor table
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*****************************************************************************/
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#define TSDT_PID 0x02
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#define TSDT_TABLE_ID 0x03
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#define TSDT_HEADER_SIZE PSI_HEADER_SIZE_SYNTAX1
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static inline void tsdt_init(uint8_t *p_tsdt)
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{
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psi_init(p_tsdt, true);
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psi_set_tableid(p_tsdt, TSDT_TABLE_ID);
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p_tsdt[1] &= ~0x40;
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psi_set_tableidext(p_tsdt, 0xffff);
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psi_set_section(p_tsdt, 0);
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psi_set_lastsection(p_tsdt, 0);
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}
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#define tsdt_set_length cat_set_length
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#define tsdt_get_desclength cat_get_desclength
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#define tsdt_set_desclength cat_set_desclength
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#define tsdt_get_descl cat_get_descl
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#define tsdt_get_descl_const cat_get_descl_const
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static inline bool tsdt_validate(const uint8_t *p_tsdt)
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{
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uint16_t i_section_size = psi_get_length(p_tsdt) + PSI_HEADER_SIZE
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- PSI_CRC_SIZE;
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if (!psi_get_syntax(p_tsdt) || psi_get_section(p_tsdt)
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|| psi_get_lastsection(p_tsdt)
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|| psi_get_tableid(p_tsdt) != TSDT_TABLE_ID)
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return false;
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if (i_section_size < TSDT_HEADER_SIZE
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|| i_section_size < TSDT_HEADER_SIZE + tsdt_get_desclength(p_tsdt))
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return false;
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if (!descl_validate(tsdt_get_descl_const(p_tsdt), tsdt_get_desclength(p_tsdt)))
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return false;
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return true;
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}
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#define tsdt_table_validate cat_table_validate
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#ifdef __cplusplus
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}
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#endif
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#endif
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