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/*****************************************************************************
* dit.h: ETSI EN 300 468 Discontinuity Information Table (DIT)
*****************************************************************************
* Copyright (C) 2011 Unix Solutions Ltd.
*
* Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject
* to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/
/*
* Normative references:
* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
*/
#ifndef __BITSTREAM_DVB_DIT_H__
#define __BITSTREAM_DVB_DIT_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/psi.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Discontinuity Information Table
*****************************************************************************/
#define DIT_PID 0x1E
#define DIT_TABLE_ID 0x7E
#define DIT_HEADER_SIZE PSI_HEADER_SIZE
static inline void dit_init(uint8_t *p_dit)
{
psi_init(p_dit, false);
psi_set_tableid(p_dit, DIT_TABLE_ID);
psi_set_length(p_dit, 1);
}
static inline void dit_set_transition_flag(uint8_t *p_dit, bool b_transition_flag)
{
p_dit[3] = b_transition_flag ? 0xff : 0x7f;
}
static inline bool dit_get_transition_flag(const uint8_t *p_dit)
{
return p_dit[3] >> 7;
}
static inline bool dit_validate(const uint8_t *p_dit)
{
uint16_t i_section_size = psi_get_length(p_dit) + PSI_HEADER_SIZE;
uint8_t i_tid = psi_get_tableid(p_dit);
if (psi_get_syntax(p_dit) || i_tid != DIT_TABLE_ID
|| i_section_size < DIT_HEADER_SIZE)
return false;
return true;
}
#ifdef __cplusplus
}
#endif
#endif
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