diff --git a/dvb/si.h b/dvb/si.h index 24e06fc..7c6fa47 100644 --- a/dvb/si.h +++ b/dvb/si.h @@ -42,6 +42,7 @@ #include #include #include +#include #ifdef __cplusplus extern "C" @@ -1024,96 +1025,6 @@ static inline void desc88p28_init(uint8_t *p_desc) #define desc88p28_validate desc83p28_validate #define desc88p28_print desc83p28_print -/***************************************************************************** - * 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 uint16_t eitn_get_desclength(const uint8_t *p_eit_n) -{ - return ((p_eit_n[10] & 0xf) << 8) | p_eit_n[11]; -} - -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); -} - -/* TODO: unfinished support */ - /***************************************************************************** * Running Status Table *****************************************************************************/ diff --git a/dvb/si/eit.h b/dvb/si/eit.h new file mode 100644 index 0000000..c4ddeea --- /dev/null +++ b/dvb/si/eit.h @@ -0,0 +1,139 @@ +/***************************************************************************** + * eit.h: ETSI EN 300 468 Event Information Table (EIT) + ***************************************************************************** + * Copyright (C) 2009-2010 VideoLAN + * + * Authors: Christophe Massiot + * + * 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 +#include +#include + +#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 uint16_t eitn_get_desclength(const uint8_t *p_eit_n) +{ + return ((p_eit_n[10] & 0xf) << 8) | p_eit_n[11]; +} + +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); +} + +/* TODO: unfinished support */ + +#ifdef __cplusplus +} +#endif + +#endif