From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/dvb/cell_list_descriptor.h | 201 +++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 lib/libucsi/dvb/cell_list_descriptor.h (limited to 'lib/libucsi/dvb/cell_list_descriptor.h') diff --git a/lib/libucsi/dvb/cell_list_descriptor.h b/lib/libucsi/dvb/cell_list_descriptor.h new file mode 100644 index 0000000..ddbaf2c --- /dev/null +++ b/lib/libucsi/dvb/cell_list_descriptor.h @@ -0,0 +1,201 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#ifndef _UCSI_DVB_CELL_LIST_DESCRIPTOR +#define _UCSI_DVB_CELL_LIST_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include + +/** + * dvb_cell_list_descriptor structure. + */ +struct dvb_cell_list_descriptor { + struct descriptor d; + + /* struct dvb_cell_list_entry cells[] */ +} __ucsi_packed; + +/** + * An entry in the cells field of a dvb_cell_list_descriptor. + */ +struct dvb_cell_list_entry { + uint16_t cell_id; + uint16_t cell_latitude; + uint16_t cell_longitude; + EBIT3(uint32_t cell_extend_of_latitude :12; , + uint32_t cell_extend_of_longitude :12; , + uint32_t subcell_info_loop_length : 8; ); + /* struct dvb_subcell_list_entry subcells[] */ +} __ucsi_packed; + +/** + * An entry in the subcells field of a dvb_cell_list_entry. + */ +struct dvb_subcell_list_entry { + uint8_t cell_id_extension; + uint16_t subcell_latitude; + uint16_t subcell_longitude; + EBIT2(uint32_t subcell_extend_of_latitude :12; , + uint32_t subcell_extend_of_longitude :12; ); +} __ucsi_packed; + +/** + * Process a dvb_cell_list_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_cell_list_descriptor pointer, or NULL on error. + */ +static inline struct dvb_cell_list_descriptor* + dvb_cell_list_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint32_t pos2 = 0; + uint8_t* buf = (uint8_t*) d + 2; + uint32_t len = d->len; + + while(pos < len) { + struct dvb_cell_list_entry *e = + (struct dvb_cell_list_entry*) (buf+pos); + + if ((pos + sizeof(struct dvb_cell_list_entry)) > len) + return NULL; + + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap16(buf+pos+4); + bswap32(buf+pos+6); + + pos += sizeof(struct dvb_cell_list_entry); + + if ((pos + e->subcell_info_loop_length) > len) + return NULL; + + if (e->subcell_info_loop_length % sizeof(struct dvb_subcell_list_entry)) + return NULL; + + pos2 = 0; + while(pos2 < e->subcell_info_loop_length) { + bswap16(buf+pos+pos2+1); + bswap16(buf+pos+pos2+3); + bswap24(buf+pos+pos2+5); + + pos2 += sizeof(struct dvb_subcell_list_entry); + } + + pos += e->subcell_info_loop_length; + } + + return (struct dvb_cell_list_descriptor*) d; +} + +/** + * Iterator for the cells field of a dvb_cell_list_descriptor. + * + * @param d dvb_cell_list_descriptor pointer. + * @param pos Variable holding a pointer to the current dvb_cell_list_entry. + */ +#define dvb_cell_list_descriptor_cells_for_each(d, pos) \ + for ((pos) = dvb_cell_list_descriptor_cells_first(d); \ + (pos); \ + (pos) = dvb_cell_list_descriptor_cells_next(d, pos)) + +/** + * Iterator for the subcells field of a dvb_cell_list_entry. + * + * @param cell dvb_cell_list_entry pointer. + * @param pos Variable holding a pointer to the current dvb_subcell_list_entry. + */ +#define dvb_cell_list_entry_subcells_for_each(cell, pos) \ + for ((pos) = dvb_cell_list_entry_subcells_first(cell); \ + (pos); \ + (pos) = dvb_cell_list_entry_subcells_next(cell, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_cell_list_entry* + dvb_cell_list_descriptor_cells_first(struct dvb_cell_list_descriptor *d) +{ + if (d->d.len == 0) + return NULL; + + return (struct dvb_cell_list_entry *) + ((uint8_t*) d + sizeof(struct dvb_cell_list_descriptor)); +} + +static inline struct dvb_cell_list_entry* + dvb_cell_list_descriptor_cells_next(struct dvb_cell_list_descriptor *d, + struct dvb_cell_list_entry *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + + sizeof(struct dvb_cell_list_entry) + + pos->subcell_info_loop_length; + + if (next >= end) + return NULL; + + return (struct dvb_cell_list_entry *) next; +} + +static inline struct dvb_subcell_list_entry* + dvb_cell_list_entry_subcells_first(struct dvb_cell_list_entry *d) +{ + if (d->subcell_info_loop_length == 0) + return NULL; + + return (struct dvb_subcell_list_entry*) + ((uint8_t*) d + sizeof(struct dvb_cell_list_entry)); +} + +static inline struct dvb_subcell_list_entry* + dvb_cell_list_entry_subcells_next(struct dvb_cell_list_entry *d, + struct dvb_subcell_list_entry *pos) +{ + uint8_t *next = (uint8_t*) pos + sizeof(struct dvb_subcell_list_entry); + uint8_t *end = (uint8_t*) d + + sizeof(struct dvb_cell_list_entry) + + d->subcell_info_loop_length; + + if (next >= end) + return NULL; + + return (struct dvb_subcell_list_entry *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3