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/mosaic_descriptor.h | 324 ++++++++++++++++++++++++++++++++++++ 1 file changed, 324 insertions(+) create mode 100644 lib/libucsi/dvb/mosaic_descriptor.h (limited to 'lib/libucsi/dvb/mosaic_descriptor.h') diff --git a/lib/libucsi/dvb/mosaic_descriptor.h b/lib/libucsi/dvb/mosaic_descriptor.h new file mode 100644 index 0000000..6da1e95 --- /dev/null +++ b/lib/libucsi/dvb/mosaic_descriptor.h @@ -0,0 +1,324 @@ +/* + * 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_MOSAIC_DESCRIPTOR +#define _UCSI_DVB_MOSAIC_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include + +/** + * dvb_mosaic_descriptor structure. + */ +struct dvb_mosaic_descriptor { + struct descriptor d; + + EBIT4(uint8_t mosaic_entry_point : 1; , + uint8_t number_of_horiz_elementary_cells: 3; , + uint8_t reserved : 1; , + uint8_t number_of_vert_elementary_cells : 3; ); + /* struct dvb_mosaic_info infos[] */ +} __ucsi_packed; + +/** + * An entry in the infos field of a dvb_mosaic_descriptor. + */ +struct dvb_mosaic_info { + EBIT3(uint16_t logical_cell_id : 6; , + uint16_t reserved : 7; , + uint16_t logical_cell_presentation_info : 3; ); + uint8_t elementary_cell_field_length; + /* struct dvb_mosaic_elementary_cell_field fields[] */ + /* struct dvb_mosaic_info_part2 part2 */ + /* struct dvb_mosaic_linkage linkage */ +} __ucsi_packed; + +/** + * An entry in the fields field of a dvb_mosaic_info. + */ +struct dvb_mosaic_elementary_cell_field { + EBIT2(uint8_t reserved : 2; , + uint8_t elementary_cell_id : 6; ); +} __ucsi_packed; + +/** + * Part2 of dvb_mosaic_info, following the variable length fields field. + */ +struct dvb_mosaic_info_part2 { + uint8_t cell_linkage_info; +} __ucsi_packed; + +struct dvb_mosaic_linkage_01 { + uint16_t bouquet_id; +} __ucsi_packed; + +struct dvb_mosaic_linkage_02 { + uint16_t original_network_id; + uint16_t transport_stream_id; + uint16_t service_id; +} __ucsi_packed; + +struct dvb_mosaic_linkage_03 { + uint16_t original_network_id; + uint16_t transport_stream_id; + uint16_t service_id; +} __ucsi_packed; + +struct dvb_mosaic_linkage_04 { + uint16_t original_network_id; + uint16_t transport_stream_id; + uint16_t service_id; + uint16_t event_id; +} __ucsi_packed; + +/** + * Structure describing the linkage field of a dvb_mosaic_info + */ +struct dvb_mosaic_linkage { + union { + struct dvb_mosaic_linkage_01 linkage_01; + struct dvb_mosaic_linkage_02 linkage_02; + struct dvb_mosaic_linkage_03 linkage_03; + struct dvb_mosaic_linkage_04 linkage_04; + } u; +} __ucsi_packed; + +/** + * Process a dvb_mosaic_descriptor. + * + * @param d Pointer to a generic descriptor structure. + */ +static inline struct dvb_mosaic_descriptor* + dvb_mosaic_descriptor_codec(struct descriptor* d) +{ + uint8_t* buf = (uint8_t*) d + 2; + uint32_t pos = 0; + uint32_t len = d->len; + struct dvb_mosaic_descriptor * p = + (struct dvb_mosaic_descriptor *) d; + + pos += (sizeof(struct dvb_mosaic_descriptor) - 2); + + if (pos > len) + return NULL; + + while(pos < len) { + struct dvb_mosaic_info *e = + (struct dvb_mosaic_info*) (buf+pos); + struct dvb_mosaic_info_part2 *e2; + struct dvb_mosaic_linkage *linkage; + + if ((pos + sizeof(struct dvb_mosaic_info)) > len) + return NULL; + + bswap16(buf + pos); + + pos += sizeof(struct dvb_mosaic_info) + + e->elementary_cell_field_length; + + if (pos > len) + return NULL; + + e2 = (struct dvb_mosaic_info_part2*) (buf+pos); + + pos += sizeof(struct dvb_mosaic_info_part2); + + if (pos > len) + return NULL; + + linkage = (struct dvb_mosaic_linkage*) (buf+pos); + + switch(e2->cell_linkage_info) { + case 0x01: + if ((pos + sizeof(struct dvb_mosaic_linkage_01)) > len) + return NULL; + bswap16(buf+pos); + pos += sizeof(struct dvb_mosaic_linkage_01); + break; + + case 0x02: + if ((pos + sizeof(struct dvb_mosaic_linkage_02)) > len) + return NULL; + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap16(buf+pos+4); + pos += sizeof(struct dvb_mosaic_linkage_02); + break; + + case 0x03: + if ((pos + sizeof(struct dvb_mosaic_linkage_03)) > len) + return NULL; + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap16(buf+pos+4); + pos += sizeof(struct dvb_mosaic_linkage_03); + break; + + case 0x04: + if ((pos + sizeof(struct dvb_mosaic_linkage_04)) > len) + return NULL; + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap16(buf+pos+4); + bswap16(buf+pos+6); + pos += sizeof(struct dvb_mosaic_linkage_04); + break; + } + } + + return p; +} + +/** + * Iterator over the infos field of a dvb_mosaic_descriptor. + * + * @param d dvb_mosaic_descriptor pointer. + * @param pos Variable containing a pointer to the current dvb_mosaic_info. + */ +#define dvb_mosaic_descriptor_infos_for_each(d, pos) \ + for ((pos) = dvb_mosaic_descriptor_infos_first(d); \ + (pos); \ + (pos) = dvb_mosaic_descriptor_infos_next(d, pos)) + +/** + * Iterator over the fields field of a dvb_mosaic_info. + * + * @param info dvb_mosaic_info pointer. + * @param pos Variable containing a pointer to the current dvb_mosaic_elementary_cell_field. + */ +#define dvb_mosaic_info_fields_for_each(info, pos) \ + for ((pos) = dvb_mosaic_info_fields_first(info); \ + (pos); \ + (pos) = dvb_mosaic_info_fields_next(info, pos)) + +/** + * Accessor for the second part of the dvb_mosaic_info structure. + * + * @param entry dvb_mosaic_info pointer. + * @return dvb_mosaic_info_part2 pointer. + */ +static inline struct dvb_mosaic_info_part2* + dvb_mosaic_info_part2(struct dvb_mosaic_info* entry) +{ + return (struct dvb_mosaic_info_part2*) + ((uint8_t*) entry + sizeof(struct dvb_mosaic_info) + + entry->elementary_cell_field_length); +} + +/** + * Accessor for the linkage field a dvb_mosaic_info structure. + * + * @param entry dvb_mosaic_info_part2 pointer. + * @return dvb_mosaic_linkage pointer, or NULL on error. + */ +static inline struct dvb_mosaic_linkage* + dvb_mosaic_linkage(struct dvb_mosaic_info_part2* entry) +{ + if ((entry->cell_linkage_info != 0x01) && + (entry->cell_linkage_info != 0x02) && + (entry->cell_linkage_info != 0x03) && + (entry->cell_linkage_info != 0x04)) + return NULL; + + return (struct dvb_mosaic_linkage*) + ((uint8_t*) entry + sizeof(struct dvb_mosaic_info_part2)); +} + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_mosaic_info* + dvb_mosaic_descriptor_infos_first(struct dvb_mosaic_descriptor *d) +{ + if (d->d.len == 1) + return NULL; + + return (struct dvb_mosaic_info *) + ((uint8_t*) d + sizeof(struct dvb_mosaic_descriptor)); +} + +static inline struct dvb_mosaic_info* + dvb_mosaic_descriptor_infos_next(struct dvb_mosaic_descriptor *d, + struct dvb_mosaic_info *pos) +{ + struct dvb_mosaic_info_part2* part2 = dvb_mosaic_info_part2(pos); + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_mosaic_info) + + pos->elementary_cell_field_length + + sizeof(struct dvb_mosaic_info_part2); + + if (part2->cell_linkage_info == 0x01) + next += sizeof(struct dvb_mosaic_linkage_01); + else if (part2->cell_linkage_info == 0x02) + next += sizeof(struct dvb_mosaic_linkage_02); + else if (part2->cell_linkage_info == 0x03) + next += sizeof(struct dvb_mosaic_linkage_03); + else if (part2->cell_linkage_info == 0x04) + next += sizeof(struct dvb_mosaic_linkage_04); + + if (next >= end) + return NULL; + + return (struct dvb_mosaic_info *) next; +} + +static inline struct dvb_mosaic_elementary_cell_field* + dvb_mosaic_info_fields_first(struct dvb_mosaic_info *d) +{ + if (d->elementary_cell_field_length == 0) + return NULL; + + return (struct dvb_mosaic_elementary_cell_field*) + ((uint8_t*) d + sizeof(struct dvb_mosaic_info)); +} + +static inline struct dvb_mosaic_elementary_cell_field* + dvb_mosaic_info_fields_next(struct dvb_mosaic_info *d, + struct dvb_mosaic_elementary_cell_field* pos) +{ + uint8_t *end = (uint8_t*) d + sizeof(struct dvb_mosaic_info) + + d->elementary_cell_field_length; + uint8_t *next = (uint8_t *) pos + + sizeof(struct dvb_mosaic_elementary_cell_field); + + if (next >= end) + return NULL; + + return (struct dvb_mosaic_elementary_cell_field *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3