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Bitstream by VideoLAN
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bitstream/dvb/si/eit.h

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/*****************************************************************************
* eit.h: ETSI EN 300 468 Event Information Table (EIT)
*****************************************************************************
* Copyright (C) 2009-2010 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* 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_EIT_H__
#define __BITSTREAM_DVB_EIT_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/psi.h>
#include <bitstream/mpeg/psi/descriptors.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Event Information Table
*****************************************************************************/
#define EIT_PID 0x12
#define EIT_TABLE_ID_PF_ACTUAL 0x4e
#define EIT_TABLE_ID_PF_OTHER 0x4f
#define EIT_TABLE_ID_SCHED_ACTUAL_FIRST 0x50
#define EIT_TABLE_ID_SCHED_ACTUAL_LAST 0x5f
#define EIT_TABLE_ID_SCHED_OTHER_FIRST 0x60
#define EIT_TABLE_ID_SCHED_OTHER_LAST 0x6f
#define EIT_HEADER_SIZE (PSI_HEADER_SIZE_SYNTAX1 + 6)
#define EIT_EVENT_SIZE 12
#define eit_set_sid psi_set_tableidext
#define eit_get_sid psi_get_tableidext
static inline void eit_init(uint8_t *p_eit, bool b_actual)
{
psi_init(p_eit, true);
psi_set_tableid(p_eit, b_actual ? EIT_TABLE_ID_PF_ACTUAL :
EIT_TABLE_ID_PF_OTHER);
}
static inline void eit_set_length(uint8_t *p_eit, uint16_t i_eit_length)
{
psi_set_length(p_eit, EIT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE
+ i_eit_length);
}
static inline void eit_set_tsid(uint8_t *p_eit, uint16_t i_tsid)
{
p_eit[8] = i_tsid >> 8;
p_eit[9] = i_tsid & 0xff;
}
static inline uint16_t eit_get_tsid(const uint8_t *p_eit)
{
return (p_eit[8] << 8) | p_eit[9];
}
static inline void eit_set_onid(uint8_t *p_eit, uint16_t i_onid)
{
p_eit[10] = i_onid >> 8;
p_eit[11] = i_onid & 0xff;
}
static inline uint16_t eit_get_onid(const uint8_t *p_eit)
{
return (p_eit[10] << 8) | p_eit[11];
}
static inline void eit_set_segment_last_sec_number(uint8_t *p_eit, uint8_t i_segment_last_sec_number)
{
p_eit[12] = i_segment_last_sec_number;
}
static inline uint8_t eit_get_segment_last_sec_number(const uint8_t *p_eit)
{
return p_eit[12];
}
static inline void eit_set_last_table_id(uint8_t *p_eit, uint8_t i_last_table_id)
{
p_eit[13] = i_last_table_id;
}
static inline uint8_t eit_get_last_table_id(const uint8_t *p_eit)
{
return p_eit[13];
}
static inline uint16_t eitn_get_event_id(const uint8_t *p_eit_n)
{
return (p_eit_n[0] << 8) | p_eit_n[1];
}
static inline void eitn_set_event_id(uint8_t *p_eit_n, uint16_t i_event_id)
{
p_eit_n[0] = i_event_id >> 8;
p_eit_n[1] = i_event_id & 0xff;
}
static inline uint64_t eitn_get_start_time(const uint8_t *p_eit_n)
{
return (uint64_t)(((uint64_t)p_eit_n[2] << 32) | ((uint64_t)p_eit_n[3] << 24) |
((uint64_t)p_eit_n[4] << 16) | ((uint64_t)p_eit_n[5] << 8) | p_eit_n[6]);
}
static inline void eitn_set_start_time(uint8_t *p_eit_n, uint64_t i_start_time)
{
p_eit_n[2] = (i_start_time >> 32) & 0xff;
p_eit_n[3] = (i_start_time >> 24) & 0xff;
p_eit_n[4] = (i_start_time >> 16) & 0xff;
p_eit_n[5] = (i_start_time >> 8) & 0xff;
p_eit_n[6] = i_start_time & 0xff;
}
static inline uint32_t eitn_get_duration_bcd(const uint8_t *p_eit_n)
{
return ((p_eit_n[7] << 16) | (p_eit_n[8] << 8)) | p_eit_n[9];
}
static inline void eitn_set_duration_bcd(uint8_t *p_eit_n, uint32_t i_duration_bcd)
{
p_eit_n[7] = (i_duration_bcd >> 16) & 0xff;
p_eit_n[8] = (i_duration_bcd >> 8) & 0xff;
p_eit_n[9] = i_duration_bcd & 0xff;
}
static inline uint8_t eitn_get_running(const uint8_t *p_eit_n)
{
return p_eit_n[10] >> 5;
}
static inline void eitn_set_running(uint8_t *p_eit_n, uint8_t i_running_status)
{
p_eit_n[10] = (p_eit_n[10] & 0x1f) | (i_running_status << 5);
}
static inline bool eitn_get_ca(const uint8_t *p_eit_n)
{
return (p_eit_n[10] & 0x10) == 0x10;
}
static inline void eitn_set_ca(uint8_t *p_eit_n, bool b_free_CA_mode)
{
p_eit_n[10] = b_free_CA_mode ? (p_eit_n[10] | 0x10) : (p_eit_n[10] &~ 0x10);
}
static inline uint16_t eitn_get_desclength(const uint8_t *p_eit_n)
{
return ((p_eit_n[10] & 0xf) << 8) | p_eit_n[11];
}
static inline void eitn_set_desclength(uint8_t *p_eit_n, uint16_t i_length)
{
p_eit_n[10] &= ~0xf;
p_eit_n[10] |= (i_length >> 8) & 0xf;
p_eit_n[11] = i_length & 0xff;
}
static inline uint8_t *eitn_get_descs(uint8_t *p_eit_n)
{
return &p_eit_n[10];
}
static inline uint8_t *eit_get_event(uint8_t *p_eit, uint8_t n)
{
uint16_t i_section_size = psi_get_length(p_eit) + PSI_HEADER_SIZE
- PSI_CRC_SIZE;
uint8_t *p_eit_n = p_eit + EIT_HEADER_SIZE;
if (p_eit_n - p_eit > i_section_size) return NULL;
while (n) {
if (p_eit_n + EIT_EVENT_SIZE - p_eit > i_section_size) return NULL;
p_eit_n += EIT_EVENT_SIZE + eitn_get_desclength(p_eit_n);
n--;
}
if (p_eit_n - p_eit >= i_section_size) return NULL;
return p_eit_n;
}
static inline bool eit_validate_event(const uint8_t *p_eit,
const uint8_t *p_eit_n,
uint16_t i_desclength)
{
uint16_t i_section_size = psi_get_length(p_eit) + PSI_HEADER_SIZE
- PSI_CRC_SIZE;
return (p_eit_n + EIT_EVENT_SIZE + i_desclength
<= p_eit + i_section_size);
}
static inline bool eit_validate(const uint8_t *p_eit)
{
uint16_t i_section_size = psi_get_length(p_eit) + PSI_HEADER_SIZE
- PSI_CRC_SIZE;
uint8_t i_tid = psi_get_tableid(p_eit);
const uint8_t *p_eit_n;
if (!psi_get_syntax(p_eit)
|| (i_tid != EIT_TABLE_ID_PF_ACTUAL
&& i_tid != EIT_TABLE_ID_PF_OTHER
&& !(i_tid >= EIT_TABLE_ID_SCHED_ACTUAL_FIRST
&& i_tid <= EIT_TABLE_ID_SCHED_ACTUAL_LAST)
&& !(i_tid >= EIT_TABLE_ID_SCHED_OTHER_FIRST
&& i_tid <= EIT_TABLE_ID_SCHED_OTHER_LAST)))
return false;
if (!psi_check_crc(p_eit))
return false;
p_eit_n = p_eit + EIT_HEADER_SIZE;
while (p_eit_n + EIT_EVENT_SIZE - p_eit <= i_section_size
&& p_eit_n + EIT_EVENT_SIZE + eitn_get_desclength(p_eit_n) - p_eit
<= i_section_size) {
if (!descs_validate(p_eit_n + 10))
return false;
p_eit_n += EIT_EVENT_SIZE + eitn_get_desclength(p_eit_n);
}
return (p_eit_n - p_eit == i_section_size);
}
#ifdef __cplusplus
}
#endif
#endif