Christophe Massiot
13 years ago
committed by
Georgi Chorbadzhiyski
Georgi Chorbadzhiyski
2 changed files with 140 additions and 90 deletions
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+1 -90dvb/si.h
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+139 -0dvb/si/eit.h
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dvb/si.h
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dvb/si/eit.h
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| @ -0,0 +1,139 @@ | |||||
| /***************************************************************************** | |||||
| * eit.h: ETSI EN 300 468 Event Information Table (EIT) | |||||
| ***************************************************************************** | |||||
| * 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_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 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 | |||||