|
|
@ -0,0 +1,102 @@ |
|
|
|
/***************************************************************************** |
|
|
|
* tot.h: ETSI EN 300 468 Time Offset Table (TOT) |
|
|
|
***************************************************************************** |
|
|
|
* Copyright (C) 2009-2010 VideoLAN |
|
|
|
* |
|
|
|
* Authors: Christophe Massiot <massiot@via.ecp.fr> |
|
|
|
* |
|
|
|
* 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_TOT_H__ |
|
|
|
#define __BITSTREAM_DVB_TOT_H__ |
|
|
|
|
|
|
|
#include <bitstream/common.h> |
|
|
|
#include <bitstream/mpeg/psi/psi.h> |
|
|
|
#include <bitstream/mpeg/psi/descriptors.h> |
|
|
|
#include <bitstream/dvb/si/tdt.h> |
|
|
|
|
|
|
|
#ifdef __cplusplus |
|
|
|
extern "C" |
|
|
|
{ |
|
|
|
#endif |
|
|
|
|
|
|
|
/***************************************************************************** |
|
|
|
* Time Offset Table |
|
|
|
*****************************************************************************/ |
|
|
|
#define TOT_PID 0x14 |
|
|
|
#define TOT_TABLE_ID 0x73 |
|
|
|
#define TOT_HEADER_SIZE (PSI_HEADER_SIZE + 7) |
|
|
|
|
|
|
|
#define tot_set_utc tdt_set_utc |
|
|
|
#define tot_get_utc tdt_get_utc |
|
|
|
|
|
|
|
static inline void tot_init(uint8_t *p_tot) |
|
|
|
{ |
|
|
|
psi_init(p_tot, false); |
|
|
|
psi_set_tableid(p_tot, TOT_TABLE_ID); |
|
|
|
p_tot[8] = 0xf0; |
|
|
|
} |
|
|
|
|
|
|
|
static inline void tot_set_desclength(uint8_t *p_tot, uint16_t i_length) |
|
|
|
{ |
|
|
|
p_tot[8] &= ~0xf; |
|
|
|
p_tot[8] |= i_length >> 8; |
|
|
|
p_tot[9] = i_length & 0xff; |
|
|
|
} |
|
|
|
|
|
|
|
static inline uint16_t tot_get_desclength(const uint8_t *p_tot) |
|
|
|
{ |
|
|
|
return ((p_tot[8] & 0xf) << 8) | p_tot[9]; |
|
|
|
} |
|
|
|
|
|
|
|
static inline bool tot_validate(const uint8_t *p_tot) |
|
|
|
{ |
|
|
|
uint16_t i_section_size = psi_get_length(p_tot) + PSI_HEADER_SIZE; |
|
|
|
uint8_t i_tid = psi_get_tableid(p_tot); |
|
|
|
|
|
|
|
if (psi_get_syntax(p_tot) || i_tid != TOT_TABLE_ID |
|
|
|
|| i_section_size < TOT_HEADER_SIZE + PSI_CRC_SIZE) |
|
|
|
return false; |
|
|
|
|
|
|
|
/* TOT is a syntax0 table with CRC */ |
|
|
|
if (!psi_check_crc(p_tot)) |
|
|
|
return false; |
|
|
|
|
|
|
|
if (i_section_size < TOT_HEADER_SIZE |
|
|
|
|| i_section_size < TOT_HEADER_SIZE + tot_get_desclength(p_tot)) |
|
|
|
return false; |
|
|
|
|
|
|
|
if (!descs_validate(p_tot + 8)) |
|
|
|
return false; |
|
|
|
|
|
|
|
return true; |
|
|
|
} |
|
|
|
|
|
|
|
#ifdef __cplusplus |
|
|
|
} |
|
|
|
#endif |
|
|
|
|
|
|
|
#endif |