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author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
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committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libucsi/dvb/linkage_descriptor.h | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-a966623153d5c69ef156542.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libucsi/dvb/linkage_descriptor.h')
-rw-r--r-- | lib/libucsi/dvb/linkage_descriptor.h | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/linkage_descriptor.h b/lib/libucsi/dvb/linkage_descriptor.h new file mode 100644 index 0000000..d2be789 --- /dev/null +++ b/lib/libucsi/dvb/linkage_descriptor.h @@ -0,0 +1,480 @@ +/* + * 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_LINKAGE_DESCRIPTOR +#define _UCSI_DVB_LINKAGE_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> +#include <libucsi/types.h> + +/** + * Possible values for linkage_type. + */ +enum { + DVB_LINKAGE_TYPE_INFORMATION = 0x01, + DVB_LINKAGE_TYPE_EPG = 0x02, + DVB_LINKAGE_TYPE_CA_REPLACEMENT = 0x03, + DVB_LINKAGE_TYPE_TS_WITH_BAT_NIT = 0x04, + DVB_LINKAGE_TYPE_SERVICE_REPLACMENT = 0x05, + DVB_LINKAGE_TYPE_DATA_BCAST = 0x06, + DVB_LINKAGE_TYPE_RCS_MAP = 0x07, + DVB_LINKAGE_TYPE_MOBILE_HANDOVER = 0x08, + DVB_LINKAGE_TYPE_SOFTWARE_UPDATE = 0x09, + DVB_LINKAGE_TYPE_TS_WITH_SSU_BAT_NIT = 0x0a, + DVB_LINKAGE_TYPE_IP_MAC_NOTIFICATION = 0x0b, + DVB_LINKAGE_TYPE_TS_WITH_INT_BAT_NIT = 0x0c, +}; + +/** + * Possible values for hand_over_type. + */ +enum { + DVB_HAND_OVER_TYPE_IDENTICAL_NEIGHBOURING_COUNTRY = 0x01, + DVB_HAND_OVER_TYPE_LOCAL_VARIATION = 0x02, + DVB_HAND_OVER_TYPE_ASSOCIATED_SERVICE = 0x03, +}; + +/** + * Possible values for origin_type. + */ +enum { + DVB_ORIGIN_TYPE_NIT = 0x00, + DVB_ORIGIN_TYPE_SDT = 0x01, +}; + +/** + * dvb_linkage_descriptor structure. + */ +struct dvb_linkage_descriptor { + struct descriptor d; + + uint16_t transport_stream_id; + uint16_t original_network_id; + uint16_t service_id; + uint8_t linkage_type; + /* uint8_t data[] */ +} __ucsi_packed; + +/** + * Data for a linkage_type of 0x08. + */ +struct dvb_linkage_data_08 { + EBIT3(uint8_t hand_over_type : 4; , + uint8_t reserved : 3; , + uint8_t origin_type : 1; ); + /* uint16_t network_id if hand_over_type == 1,2,3 */ + /* uint16_t initial_service_id if origin_type = 0 */ + /* uint8_t data[] */ +} __ucsi_packed; + +/** + * Data for an linkage_type of 0x0b (IP/MAC Notification Table). + */ +struct dvb_linkage_data_0b { + uint8_t platform_id_data_length; + /* struct platform_id ids[] */ +} __ucsi_packed; + +/** + * Entries in the ids field of a dvb_linkage_data_0b. + */ +struct dvb_platform_id { + EBIT2(uint32_t platform_id : 24; , + uint8_t platform_name_loop_length : 8; ); + /* struct platform_name names[] */ +} __ucsi_packed; + +/** + * Entries in the names field of a dvb_platform_id. + */ +struct dvb_platform_name { + iso639lang_t language_code; + uint8_t platform_name_length; + /* uint8_t text[] */ +} __ucsi_packed; + +/** + * Data for a linkage_type of 0x0c (IP/MAC Notification Table). + */ +struct dvb_linkage_data_0c { + uint8_t table_type; + /* uint16_t bouquet_id if table_type == 0x02 */ +} __ucsi_packed; + + +/** + * Process a dvb_linkage_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_linkage_descriptor pointer, or NULL on error. + */ +static inline struct dvb_linkage_descriptor* + dvb_linkage_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint8_t* buf = (uint8_t*) d + 2; + uint32_t len = d->len; + struct dvb_linkage_descriptor *p = + (struct dvb_linkage_descriptor*) d; + + if (len < (sizeof(struct dvb_linkage_descriptor) - 2)) + return NULL; + + bswap16(buf); + bswap16(buf+2); + bswap16(buf+4); + + pos += sizeof(struct dvb_linkage_descriptor) - 2; + + if (p->linkage_type == 0x08) { + struct dvb_linkage_data_08 *d08; + + if ((len - pos) < sizeof(struct dvb_linkage_data_08)) + return NULL; + d08 = (struct dvb_linkage_data_08 *) (buf+pos); + pos += sizeof(struct dvb_linkage_data_08); + + switch(d08->hand_over_type) { + case 1: + case 2: + case 3: + if ((len - pos) < 2) + return NULL; + bswap16(buf+pos); + pos += 2; + break; + } + if (d08->origin_type == 0) { + if ((len - pos) < 2) + return NULL; + bswap16(buf+pos); + pos+=2; + } + + } else if (p->linkage_type == 0x0b) { + uint32_t pos2=0; + struct dvb_linkage_data_0b *l_0b = (struct dvb_linkage_data_0b *) (buf + pos); + + if ((len - pos) < sizeof(struct dvb_linkage_data_0b)) + return NULL; + + pos += sizeof(struct dvb_linkage_data_0b); + if ((len - pos) < l_0b->platform_id_data_length) + return NULL; + + while (pos2 < l_0b->platform_id_data_length) { + bswap32(buf + pos + pos2); + + struct dvb_platform_id *p_id = (struct dvb_platform_id *) (buf + pos + pos2); + if ((len - pos - pos2) < p_id->platform_name_loop_length) + return NULL; + + pos2 += sizeof(struct dvb_platform_id) + p_id->platform_name_loop_length; + } + + pos += pos2; + } else if (p->linkage_type == 0x0c) { + struct dvb_linkage_data_0c *l_0c = (struct dvb_linkage_data_0c *) (buf + pos); + + if ((len - pos) < sizeof(struct dvb_linkage_data_0c)) + return NULL; + pos += sizeof(struct dvb_linkage_data_0c); + + if (l_0c->table_type == 0x02) { + if ((len - pos) < 2) + return NULL; + bswap16(buf+pos); + } + } + + return (struct dvb_linkage_descriptor*) d; +} + +/** + * Accessor for the data field of a dvb_linkage_descriptor. + * + * @param d dvb_linkage_descriptor pointer. + * @return Pointer to the data field. + */ +static inline uint8_t * + dvb_linkage_descriptor_data(struct dvb_linkage_descriptor *d) +{ + return (uint8_t *) d + sizeof(struct dvb_linkage_descriptor); +} + +/** + * Determine the length of the data field of a dvb_linkage_descriptor. + * + * @param d dvb_linkage_descriptor pointer. + * @return Length of the field in bytes. + */ +static inline int + dvb_linkage_descriptor_data_length(struct dvb_linkage_descriptor *d) +{ + return d->d.len - 7; +} + +/** + * Accessor for a dvb_linkage_data_08 pointer. + * + * @param d dvb_linkage_descriptor pointer. + * @return Pointer to the data field. + */ +static inline struct dvb_linkage_data_08 * + dvb_linkage_data_08(struct dvb_linkage_descriptor *d) +{ + if (d->linkage_type != 0x08) + return NULL; + return (struct dvb_linkage_data_08 *) dvb_linkage_descriptor_data(d); +} + +/** + * Accessor for the network_id field of a dvb_linkage_data_08. + * + * @param d dvb_linkage_descriptor pointer + * @param d08 dvb_linkage_data_08 pointer. + * @return network_id, or -1 if not present + */ +static inline int + dvb_linkage_data_08_network_id(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08) +{ + if (d->linkage_type != 0x08) + return -1; + + switch(d08->hand_over_type) { + case 1: + case 2: + case 3: + return *((uint16_t*) ((uint8_t*) d08 + sizeof(struct dvb_linkage_data_08))); + } + + return -1; +} + +/** + * Accessor for the initial_service_id field of a dvb_linkage_data_08. + * + * @param d dvb_linkage_descriptor pointer + * @param d08 dvb_linkage_data_08 pointer. + * @return initial_service_id, or -1 if not present + */ +static inline int + dvb_linkage_data_08_initial_service_id(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08) +{ + uint8_t *pos; + + if (d->linkage_type != 0x08) + return -1; + if (d08->origin_type != 0) + return -1; + + pos = ((uint8_t*) d08) + sizeof(struct dvb_linkage_data_08); + switch(d08->hand_over_type) { + case 1: + case 2: + case 3: + pos +=2; + break; + } + + return *((uint16_t*) pos); +} + +/** + * Accessor for the data field of a dvb_linkage_data_08. + * + * @param d dvb_linkage_descriptor pointer + * @param d08 dvb_linkage_data_08 pointer. + * @param length Pointer to int destination for data length. + * @return Pointer to the data field, or NULL if invalid + */ +static inline uint8_t * + dvb_linkage_data_08_data(struct dvb_linkage_descriptor *d, struct dvb_linkage_data_08 *d08, int *length) +{ + uint8_t *pos; + int used = 0; + + if (d->linkage_type != 0x08) { + *length = 0; + return NULL; + } + + pos = ((uint8_t*) d08) + sizeof(struct dvb_linkage_data_08); + switch(d08->hand_over_type) { + case 1: + case 2: + case 3: + pos += 2; + used += 2; + break; + } + if (d08->origin_type == 0) { + pos+=2; + used+=2; + } + + *length = dvb_linkage_descriptor_data_length(d) - (sizeof(struct dvb_linkage_data_08) + used); + return pos; +} + +/** + * Accessor for a dvb_linkage_data_0b pointer. + * + * @param d dvb_linkage_descriptor pointer. + * @return Pointer to the data field. + */ +static inline struct dvb_linkage_data_0b * + dvb_linkage_data_0b(struct dvb_linkage_descriptor *d) +{ + if (d->linkage_type != 0x0b) + return NULL; + return (struct dvb_linkage_data_0b *) dvb_linkage_descriptor_data(d); +} + +/** + * Iterator for the platform_id field of a dvb_linkage_data_0b. + * + * @param linkage dvb_linkage_data_0b pointer. + * @param pos Variable containing a pointer to the current dvb_platform_id. + */ +#define dvb_linkage_data_0b_platform_id_for_each(linkage, pos) \ + for ((pos) = dvb_platform_id_first(linkage); \ + (pos); \ + (pos) = dvb_platform_id_next(linkage, pos)) + +/** + * Iterator for the platform_name field of a dvb_platform_id. + * + * @param platid dvb_platform_id pointer. + * @param pos Variable containing a pointer to the current dvb_platform_name. + */ +#define dvb_platform_id_platform_name_for_each(platid, pos) \ + for ((pos) = dvb_platform_name_first(platid); \ + (pos); \ + (pos) = dvb_platform_name_next(platid, pos)) + +/** + * Accessor for the text field of a dvb_platform_name. + * + * @param p dvb_platform_name pointer. + * @return Pointer to the field. + */ +static inline uint8_t * + dvb_platform_name_text(struct dvb_platform_name *p) +{ + return (uint8_t *) p + sizeof(struct dvb_platform_name); +} + +/** + * Accessor for a dvb_linkage_data_0c pointer. + * + * @param d dvb_linkage_descriptor pointer. + * @return Pointer to the data field. + */ +static inline struct dvb_linkage_data_0c * + dvb_linkage_data_0c(struct dvb_linkage_descriptor *d) +{ + if (d->linkage_type != 0x0c) + return NULL; + return (struct dvb_linkage_data_0c *) dvb_linkage_descriptor_data(d); +} + +/** + * Accessor for the bouquet_id field of a dvb_linkage_data_0c if table_id == 0x02. + * + * @param l_0c dvb_linkage_data_0c pointer. + * @return The bouquet field, or -1 on error. + */ +static inline int + dvb_linkage_data_0c_bouquet_id(struct dvb_linkage_data_0c *l_0c) +{ + if (l_0c->table_type != 0x02) + return -1; + + return *((uint16_t *) ((uint8_t*) l_0c + 1)); +} + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_platform_id * + dvb_platform_id_first(struct dvb_linkage_data_0b *d) +{ + if (d->platform_id_data_length == 0) + return NULL; + + return (struct dvb_platform_id *) ((uint8_t *) d + sizeof(struct dvb_linkage_data_0b)); +} + +static inline struct dvb_platform_id * + dvb_platform_id_next(struct dvb_linkage_data_0b *d, + struct dvb_platform_id *pos) +{ + uint8_t *end = (uint8_t *) d + d->platform_id_data_length; + uint8_t *next = (uint8_t *) pos + + sizeof(struct dvb_platform_id) + + pos->platform_name_loop_length; + + if (next >= end) + return NULL; + + return (struct dvb_platform_id *) next; +} + +static inline struct dvb_platform_name * + dvb_platform_name_first(struct dvb_platform_id *p) +{ + if (p->platform_name_loop_length == 0) + return NULL; + + return (struct dvb_platform_name *) ((uint8_t *) p + sizeof(struct dvb_platform_id)); +} + +static inline struct dvb_platform_name * + dvb_platform_name_next(struct dvb_platform_id *p, + struct dvb_platform_name *pos) +{ + uint8_t *end = (uint8_t *) p + p->platform_name_loop_length; + uint8_t *next = (uint8_t *) pos + + sizeof(struct dvb_platform_name) + + pos->platform_name_length; + + if (next >= end) + return NULL; + + return (struct dvb_platform_name *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |