| @ -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 | |||