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84 lines
2.7 KiB
84 lines
2.7 KiB
/*****************************************************************************
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* dit.h: ETSI EN 300 468 Discontinuity Information Table (DIT)
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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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* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_DIT_H__
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#define __BITSTREAM_DVB_DIT_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/psi.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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* Discontinuity Information Table
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*****************************************************************************/
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#define DIT_PID 0x1E
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#define DIT_TABLE_ID 0x7E
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#define DIT_HEADER_SIZE PSI_HEADER_SIZE
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static inline void dit_init(uint8_t *p_dit)
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{
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psi_init(p_dit, false);
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psi_set_tableid(p_dit, DIT_TABLE_ID);
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psi_set_length(p_dit, 1);
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}
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static inline void dit_set_transition_flag(uint8_t *p_dit, bool b_transition_flag)
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{
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p_dit[3] = b_transition_flag ? 0xff : 0x7f;
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}
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static inline bool dit_get_transition_flag(const uint8_t *p_dit)
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{
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return p_dit[3] >> 7;
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}
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static inline bool dit_validate(const uint8_t *p_dit)
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{
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uint16_t i_section_size = psi_get_length(p_dit) + PSI_HEADER_SIZE;
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uint8_t i_tid = psi_get_tableid(p_dit);
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if (psi_get_syntax(p_dit) || i_tid != DIT_TABLE_ID
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|| i_section_size < DIT_HEADER_SIZE)
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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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