Christophe Massiot
13 years ago
committed by
Georgi Chorbadzhiyski
Georgi Chorbadzhiyski
4 changed files with 385 additions and 288 deletions
Unified View
Diff Options
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+1 -219dvb/si.h
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+268 -0dvb/si/nit.h
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+115 -0dvb/si/nit_print.h
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+1 -69dvb/si_print.h
+ 1
- 219
dvb/si.h
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+ 268
- 0
dvb/si/nit.h
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| @ -0,0 +1,268 @@ | |||||
| /***************************************************************************** | |||||
| * nit.h: ETSI EN 300 468 Network Information Table (NIT) | |||||
| ***************************************************************************** | |||||
| * 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_NIT_H__ | |||||
| #define __BITSTREAM_DVB_NIT_H__ | |||||
| #include <bitstream/common.h> | |||||
| #include <bitstream/mpeg/psi/psi.h> | |||||
| #include <bitstream/mpeg/psi/descriptors.h> | |||||
| #ifdef __cplusplus | |||||
| extern "C" | |||||
| { | |||||
| #endif | |||||
| /***************************************************************************** | |||||
| * Network Information Table | |||||
| *****************************************************************************/ | |||||
| #define NIT_PID 0x10 | |||||
| #define NIT_TABLE_ID_ACTUAL 0x40 | |||||
| #define NIT_TABLE_ID_OTHER 0x41 | |||||
| #define NIT_HEADER_SIZE (PSI_HEADER_SIZE_SYNTAX1 + 2) | |||||
| #define NIT_HEADER2_SIZE 2 | |||||
| #define NIT_TS_SIZE 6 | |||||
| #define nit_set_nid psi_set_tableidext | |||||
| #define nit_get_nid psi_get_tableidext | |||||
| static inline void nit_init(uint8_t *p_nit, bool b_actual) | |||||
| { | |||||
| psi_init(p_nit, true); | |||||
| psi_set_tableid(p_nit, b_actual ? NIT_TABLE_ID_ACTUAL : NIT_TABLE_ID_OTHER); | |||||
| p_nit[8] = 0xf0; | |||||
| } | |||||
| static inline void nit_set_length(uint8_t *p_nit, uint16_t i_nit_length) | |||||
| { | |||||
| psi_set_length(p_nit, NIT_HEADER_SIZE + PSI_CRC_SIZE - PSI_HEADER_SIZE | |||||
| + i_nit_length); | |||||
| } | |||||
| static inline void nit_set_desclength(uint8_t *p_nit, uint16_t i_length) | |||||
| { | |||||
| p_nit[8] &= ~0xf; | |||||
| p_nit[8] |= i_length >> 8; | |||||
| p_nit[9] = i_length & 0xff; | |||||
| } | |||||
| static inline uint16_t nit_get_desclength(const uint8_t *p_nit) | |||||
| { | |||||
| return ((p_nit[8] & 0xf) << 8) | p_nit[9]; | |||||
| } | |||||
| static inline uint8_t *nit_get_descs(uint8_t *p_nit) | |||||
| { | |||||
| return &p_nit[8]; | |||||
| } | |||||
| static inline void nith_init(uint8_t *p_nit_h) | |||||
| { | |||||
| p_nit_h[0] = 0xf0; | |||||
| } | |||||
| static inline void nith_set_tslength(uint8_t *p_nit_h, uint16_t i_length) | |||||
| { | |||||
| p_nit_h[0] &= ~0xf; | |||||
| p_nit_h[0] |= i_length >> 8; | |||||
| p_nit_h[1] = i_length & 0xff; | |||||
| } | |||||
| static inline uint16_t nith_get_tslength(const uint8_t *p_nit_h) | |||||
| { | |||||
| return ((p_nit_h[0] & 0xf) << 8) | p_nit_h[1]; | |||||
| } | |||||
| static inline void nitn_init(uint8_t *p_nit_n) | |||||
| { | |||||
| p_nit_n[4] = 0xf0; | |||||
| } | |||||
| static inline void nitn_set_tsid(uint8_t *p_nit_n, uint16_t i_tsid) | |||||
| { | |||||
| p_nit_n[0] = i_tsid >> 8; | |||||
| p_nit_n[1] = i_tsid & 0xff; | |||||
| } | |||||
| static inline uint16_t nitn_get_tsid(const uint8_t *p_nit_n) | |||||
| { | |||||
| return (p_nit_n[0] << 8) | p_nit_n[1]; | |||||
| } | |||||
| static inline void nitn_set_onid(uint8_t *p_nit_n, uint16_t i_onid) | |||||
| { | |||||
| p_nit_n[2] = i_onid >> 8; | |||||
| p_nit_n[3] = i_onid & 0xff; | |||||
| } | |||||
| static inline uint16_t nitn_get_onid(const uint8_t *p_nit_n) | |||||
| { | |||||
| return (p_nit_n[2] << 8) | p_nit_n[3]; | |||||
| } | |||||
| static inline void nitn_set_desclength(uint8_t *p_nit_n, uint16_t i_length) | |||||
| { | |||||
| p_nit_n[4] &= ~0xf; | |||||
| p_nit_n[4] |= i_length >> 8; | |||||
| p_nit_n[5] = i_length & 0xff; | |||||
| } | |||||
| static inline uint16_t nitn_get_desclength(const uint8_t *p_nit_n) | |||||
| { | |||||
| return ((p_nit_n[4] & 0xf) << 8) | p_nit_n[5]; | |||||
| } | |||||
| static inline uint8_t *nitn_get_descs(uint8_t *p_nit_n) | |||||
| { | |||||
| return &p_nit_n[4]; | |||||
| } | |||||
| static inline uint8_t *nit_get_header2(uint8_t *p_nit) | |||||
| { | |||||
| return p_nit + NIT_HEADER_SIZE + nit_get_desclength(p_nit); | |||||
| } | |||||
| static inline uint8_t *nit_get_ts(uint8_t *p_nit, uint8_t n) | |||||
| { | |||||
| uint16_t i_section_size = psi_get_length(p_nit) + PSI_HEADER_SIZE | |||||
| - PSI_CRC_SIZE; | |||||
| uint8_t *p_nit_n = p_nit + NIT_HEADER_SIZE + nit_get_desclength(p_nit) | |||||
| + NIT_HEADER2_SIZE; | |||||
| if (p_nit_n - p_nit > i_section_size) return NULL; | |||||
| while (n) { | |||||
| if (p_nit_n + NIT_TS_SIZE - p_nit > i_section_size) return NULL; | |||||
| p_nit_n += NIT_TS_SIZE + nitn_get_desclength(p_nit_n); | |||||
| n--; | |||||
| } | |||||
| if (p_nit_n - p_nit >= i_section_size) return NULL; | |||||
| return p_nit_n; | |||||
| } | |||||
| static inline bool nit_validate_ts(const uint8_t *p_nit, const uint8_t *p_nit_n, | |||||
| uint16_t i_desclength) | |||||
| { | |||||
| uint16_t i_section_size = psi_get_length(p_nit) + PSI_HEADER_SIZE | |||||
| - PSI_CRC_SIZE; | |||||
| return (p_nit_n + NIT_TS_SIZE + i_desclength | |||||
| <= p_nit + i_section_size); | |||||
| } | |||||
| static inline bool nit_validate(const uint8_t *p_nit) | |||||
| { | |||||
| uint16_t i_section_size = psi_get_length(p_nit) + PSI_HEADER_SIZE | |||||
| - PSI_CRC_SIZE; | |||||
| const uint8_t *p_nit_n; | |||||
| if (!psi_get_syntax(p_nit) | |||||
| || (psi_get_tableid(p_nit) != NIT_TABLE_ID_ACTUAL | |||||
| && psi_get_tableid(p_nit) != NIT_TABLE_ID_OTHER)) | |||||
| return false; | |||||
| if (i_section_size < NIT_HEADER_SIZE | |||||
| || i_section_size < NIT_HEADER_SIZE + nit_get_desclength(p_nit)) | |||||
| return false; | |||||
| if (!descs_validate(p_nit + 8)) | |||||
| return false; | |||||
| p_nit_n = p_nit + NIT_HEADER_SIZE + nit_get_desclength(p_nit); | |||||
| if (nith_get_tslength(p_nit_n) != p_nit + i_section_size - p_nit_n | |||||
| - NIT_HEADER2_SIZE) | |||||
| return false; | |||||
| p_nit_n += NIT_HEADER2_SIZE; | |||||
| while (p_nit_n + NIT_TS_SIZE - p_nit <= i_section_size | |||||
| && p_nit_n + NIT_TS_SIZE + nitn_get_desclength(p_nit_n) - p_nit | |||||
| <= i_section_size) { | |||||
| if (!descs_validate(p_nit_n + 4)) | |||||
| return false; | |||||
| p_nit_n += NIT_TS_SIZE + nitn_get_desclength(p_nit_n); | |||||
| } | |||||
| return (p_nit_n - p_nit == i_section_size); | |||||
| } | |||||
| static inline uint8_t *nit_table_find_ts(uint8_t **pp_sections, | |||||
| uint16_t i_tsid, uint16_t i_onid) | |||||
| { | |||||
| uint8_t i_last_section = psi_table_get_lastsection(pp_sections); | |||||
| uint8_t i; | |||||
| for (i = 0; i <= i_last_section; i++) { | |||||
| uint8_t *p_section = psi_table_get_section(pp_sections, i); | |||||
| uint8_t *p_ts; | |||||
| int j = 0; | |||||
| while ((p_ts = nit_get_ts(p_section, j)) != NULL) { | |||||
| j++; | |||||
| if (nitn_get_tsid(p_ts) == i_tsid && nitn_get_onid(p_ts) == i_onid) | |||||
| return p_ts; | |||||
| } | |||||
| } | |||||
| return NULL; | |||||
| } | |||||
| static inline bool nit_table_validate(uint8_t **pp_sections) | |||||
| { | |||||
| uint8_t i_last_section = psi_table_get_lastsection(pp_sections); | |||||
| uint8_t i; | |||||
| for (i = 0; i <= i_last_section; i++) { | |||||
| uint8_t *p_section = psi_table_get_section(pp_sections, i); | |||||
| uint8_t *p_ts; | |||||
| int j = 0; | |||||
| if (!psi_check_crc(p_section)) | |||||
| return false; | |||||
| while ((p_ts = nit_get_ts(p_section, j)) != NULL) { | |||||
| j++; | |||||
| /* check that the TS is not already in the table */ | |||||
| if (nit_table_find_ts(pp_sections, nitn_get_tsid(p_ts), | |||||
| nitn_get_onid(p_ts)) != p_ts) | |||||
| return false; | |||||
| } | |||||
| } | |||||
| return true; | |||||
| } | |||||
| #ifdef __cplusplus | |||||
| } | |||||
| #endif | |||||
| #endif | |||||
+ 115
- 0
dvb/si/nit_print.h
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| @ -0,0 +1,115 @@ | |||||
| /***************************************************************************** | |||||
| * nit_print.h: ETSI EN 300 468 Network Information Table (NIT) (printing) | |||||
| ***************************************************************************** | |||||
| * Copyright (C) 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. | |||||
| *****************************************************************************/ | |||||
| #ifndef __BITSTREAM_DVB_NIT_PRINT_H__ | |||||
| #define __BITSTREAM_DVB_NIT_PRINT_H__ | |||||
| #include <bitstream/common.h> | |||||
| #include <bitstream/mpeg/psi/psi.h> | |||||
| #include <bitstream/mpeg/psi/descs_print.h> | |||||
| #include <bitstream/dvb/si/nit.h> | |||||
| #ifdef __cplusplus | |||||
| extern "C" | |||||
| { | |||||
| #endif | |||||
| /***************************************************************************** | |||||
| * Network Information Table | |||||
| *****************************************************************************/ | |||||
| static inline void nit_table_print(uint8_t **pp_sections, | |||||
| f_print pf_print, void *print_opaque, | |||||
| f_iconv pf_iconv, void *iconv_opaque, | |||||
| print_type_t i_print_type) | |||||
| { | |||||
| uint8_t i_last_section = psi_table_get_lastsection(pp_sections); | |||||
| uint8_t i; | |||||
| switch (i_print_type) { | |||||
| case PRINT_XML: | |||||
| pf_print(print_opaque, "<NIT tid=\"%hhu\" networkid=\"%hu\" version=\"%hhu\" current_next=\"%d\">", | |||||
| psi_table_get_tableid(pp_sections), | |||||
| psi_table_get_tableidext(pp_sections), | |||||
| psi_table_get_version(pp_sections), | |||||
| !psi_table_get_current(pp_sections) ? 0 : 1); | |||||
| break; | |||||
| default: | |||||
| pf_print(print_opaque, "new NIT %s networkid=%hu version=%hhu%s", | |||||
| psi_table_get_tableid(pp_sections) == NIT_TABLE_ID_ACTUAL ? | |||||
| "actual" : "other", | |||||
| psi_table_get_tableidext(pp_sections), | |||||
| psi_table_get_version(pp_sections), | |||||
| !psi_table_get_current(pp_sections) ? " (next)" : ""); | |||||
| } | |||||
| descs_print(nit_get_descs(psi_table_get_section(pp_sections, 0)), | |||||
| pf_print, print_opaque, pf_iconv, iconv_opaque, i_print_type); | |||||
| for (i = 0; i <= i_last_section; i++) { | |||||
| uint8_t *p_section = psi_table_get_section(pp_sections, i); | |||||
| uint8_t *p_ts; | |||||
| int j = 0; | |||||
| while ((p_ts = nit_get_ts(p_section, j)) != NULL) { | |||||
| j++; | |||||
| switch (i_print_type) { | |||||
| case PRINT_XML: | |||||
| pf_print(print_opaque, "<TS tsid=\"%hu\" onid=\"%hu\">", | |||||
| nitn_get_tsid(p_ts), nitn_get_onid(p_ts)); | |||||
| break; | |||||
| default: | |||||
| pf_print(print_opaque, " * ts tsid=%hu onid=%hu", | |||||
| nitn_get_tsid(p_ts), nitn_get_onid(p_ts)); | |||||
| } | |||||
| descs_print(nitn_get_descs(p_ts), pf_print, print_opaque, | |||||
| pf_iconv, iconv_opaque, i_print_type); | |||||
| switch (i_print_type) { | |||||
| case PRINT_XML: | |||||
| pf_print(print_opaque, "</TS>"); | |||||
| break; | |||||
| default: | |||||
| break; | |||||
| } | |||||
| } | |||||
| } | |||||
| switch (i_print_type) { | |||||
| case PRINT_XML: | |||||
| pf_print(print_opaque, "</NIT>"); | |||||
| break; | |||||
| default: | |||||
| pf_print(print_opaque, "end NIT"); | |||||
| } | |||||
| } | |||||
| #ifdef __cplusplus | |||||
| } | |||||
| #endif | |||||
| #endif | |||||