diff options
Diffstat (limited to 'lib/libucsi/dvb/announcement_support_descriptor.h')
| -rw-r--r-- | lib/libucsi/dvb/announcement_support_descriptor.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/announcement_support_descriptor.h b/lib/libucsi/dvb/announcement_support_descriptor.h new file mode 100644 index 0000000..9eb20c4 --- /dev/null +++ b/lib/libucsi/dvb/announcement_support_descriptor.h @@ -0,0 +1,219 @@ +/* + * 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_ANNOUNCEMENT_SUPPORT_DESCRIPTOR +#define _UCSI_DVB_ANNOUNCEMENT_SUPPORT_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> + +/** + * Possible values for announcement_support_indicator. + */ +enum { + DVB_ANNOUNCEMENT_SUPPORT_EMERGENCY = 0x01, + DVB_ANNOUNCEMENT_SUPPORT_ROAD_TRAFFIC_FLASH = 0x02, + DVB_ANNOUNCEMENT_SUPPORT_PUBLIC_TRANSPORT_FLASH = 0x04, + DVB_ANNOUNCEMENT_SUPPORT_WARNING_MESSAGE = 0x08, + DVB_ANNOUNCEMENT_SUPPORT_NEWS_FLASH = 0x10, + DVB_ANNOUNCEMENT_SUPPORT_WEATHER_FLASH = 0x20, + DVB_ANNOUNCEMENT_SUPPORT_EVENT_ANNOUNCEMENT = 0x40, + DVB_ANNOUNCEMENT_SUPPORT_PERSONAL_CALL = 0x80, +}; + +/** + * Possible values for announcement_type. + */ +enum { + DVB_ANNOUNCEMENT_TYPE_EMERGENCY = 0x00, + DVB_ANNOUNCEMENT_TYPE_ROAD_TRAFFIC_FLASH = 0x01, + DVB_ANNOUNCEMENT_TYPE_PUBLIC_TRANSPORT_FLASH = 0x02, + DVB_ANNOUNCEMENT_TYPE_WARNING_MESSAGE = 0x03, + DVB_ANNOUNCEMENT_TYPE_NEWS_FLASH = 0x04, + DVB_ANNOUNCEMENT_TYPE_WEATHER_FLASH = 0x05, + DVB_ANNOUNCEMENT_TYPE_EVENT_ANNOUNCEMENT = 0x06, + DVB_ANNOUNCEMENT_TYPE_PERSONAL_CALL = 0x07, +}; + +/** + * Possible values for reference_type. + */ +enum { + DVB_REFERENCE_TYPE_AUDIO = 0x00, + DVB_REFERENCE_TYPE_OTHER_AUDIO = 0x01, + DVB_REFERENCE_TYPE_OTHER_SERVICE = 0x02, + DVB_REFERENCE_TYPE_OTHER_TS = 0x03, +}; + +/** + * dvb_announcement_support_descriptor structure. + */ +struct dvb_announcement_support_descriptor { + struct descriptor d; + uint16_t announcement_support_indicator; + /* struct dvb_announcement_support_entry entries[] */ +} __ucsi_packed; + +/** + * An entry in the entries field of a dvb_announcement_support_descriptor. + */ +struct dvb_announcement_support_entry { + EBIT3(uint8_t announcement_type : 4; , + uint8_t reserved : 1; , + uint8_t reference_type : 3; ); + /* Only if reference_type == 1, 2 or 3: + * struct dvb_announcement_support_reference reference */ +} __ucsi_packed; + +/** + * The optional reference field only present in a dvb_announcement_support_descriptor if + * its reference_type field is 1,2 or 3. + */ +struct dvb_announcement_support_reference { + uint16_t original_network_id; + uint16_t transport_stream_id; + uint16_t service_id; + uint8_t component_tag; +} __ucsi_packed; + +/** + * Process a dvb_announcement_support_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_announcement_support_descriptor pointer, or NULL on error. + */ +static inline struct dvb_announcement_support_descriptor* + dvb_announcement_support_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint8_t* buf = (uint8_t*) d + 2; + uint32_t len = d->len; + + if (len < (sizeof(struct dvb_announcement_support_descriptor) - 2)) + return NULL; + + bswap16(buf+pos); + + pos += 2; + + while(pos < len) { + struct dvb_announcement_support_entry *e = + (struct dvb_announcement_support_entry*) (buf+pos); + + pos += sizeof(struct dvb_announcement_support_entry); + + if (pos > len) + return NULL; + + if ((e->reference_type == 1) || + (e->reference_type == 2) || + (e->reference_type == 3)) { + if ((pos + sizeof(struct dvb_announcement_support_reference)) > len) + return NULL; + + bswap16(buf+pos); + bswap16(buf+pos+2); + bswap16(buf+pos+4); + + pos += sizeof(struct dvb_announcement_support_reference); + } + } + + return (struct dvb_announcement_support_descriptor*) d; +} + +/** + * Iterator for the entries field of a dvb_announcement_support_descriptor. + * + * @param d dvb_announcement_support_descriptor pointer. + * @param pod Variable holding a pointer to the current dvb_announcement_support_entry. + */ +#define dvb_announcement_support_descriptor_entries_for_each(d, pos) \ + for ((pos) = dvb_announcement_support_descriptor_entries_first(d); \ + (pos); \ + (pos) = dvb_announcement_support_descriptor_entries_next(d, pos)) + +/** + * Accessor for the reference field of a dvb_announcement_support_entry if present. + * + * @param entry dvb_announcement_support_entry pointer. + * @return dvb_announcement_support_reference pointer, or NULL on error. + */ +static inline struct dvb_announcement_support_reference* + dvb_announcement_support_entry_reference(struct dvb_announcement_support_entry* entry) +{ + if ((entry->reference_type != 0x01) && + (entry->reference_type != 0x02) && + (entry->reference_type != 0x03)) + return NULL; + + return (struct dvb_announcement_support_reference*) + ((uint8_t*) entry + sizeof(struct dvb_announcement_support_entry)); +} + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_announcement_support_entry* + dvb_announcement_support_descriptor_entries_first(struct dvb_announcement_support_descriptor *d) +{ + if (d->d.len == 2) + return NULL; + + return (struct dvb_announcement_support_entry *) + ((uint8_t*) d + sizeof(struct dvb_announcement_support_descriptor)); +} + +static inline struct dvb_announcement_support_entry* + dvb_announcement_support_descriptor_entries_next(struct dvb_announcement_support_descriptor *d, + struct dvb_announcement_support_entry *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t* next = (uint8_t*) pos + sizeof(struct dvb_announcement_support_entry); + struct dvb_announcement_support_reference* reference = + dvb_announcement_support_entry_reference(pos); + + if (reference) + next += sizeof(struct dvb_announcement_support_reference); + + if (next >= end) + return NULL; + + return (struct dvb_announcement_support_entry *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |