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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/service_list_descriptor.h | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-debian/1.1.1+rev1207-1.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libucsi/dvb/service_list_descriptor.h')
-rw-r--r-- | lib/libucsi/dvb/service_list_descriptor.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/service_list_descriptor.h b/lib/libucsi/dvb/service_list_descriptor.h new file mode 100644 index 0000000..0086b25 --- /dev/null +++ b/lib/libucsi/dvb/service_list_descriptor.h @@ -0,0 +1,122 @@ +/* + * 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_SERVICE_LIST_DESCRIPTOR +#define _UCSI_DVB_SERVICE_LIST_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> + +/** + * dvb_service_list_descriptor structure. + */ +struct dvb_service_list_descriptor { + struct descriptor d; + + /* struct dvb_service_list_service services[] */ +} __ucsi_packed; + +/** + * An entry in the services field of a dvb_service_list_descriptor. + */ +struct dvb_service_list_service { + uint16_t service_id; + uint8_t service_type; +} __ucsi_packed; + +/** + * Process a dvb_service_list_descriptor. + * + * @param d Generic descriptor structure. + * @return dvb_service_list_descriptor pointer, or NULL on error. + */ +static inline struct dvb_service_list_descriptor* + dvb_service_list_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint32_t len = d->len; + uint8_t *p = (uint8_t*) d + 2; + + if (len % sizeof(struct dvb_service_list_service)) + return NULL; + + while(pos < len) { + bswap16(p+pos); + pos += sizeof(struct dvb_service_list_service); + } + + return (struct dvb_service_list_descriptor*) d; +} + +/** + * Iterator for services field in a dvb_service_list_descriptor. + * + * @param d dvb_service_list_descriptor pointer. + * @param pos Variable containing a pointer to the current dvb_service_list_service. + */ +#define dvb_service_list_descriptor_services_for_each(d, pos) \ + for ((pos) = dvb_service_list_descriptor_services_first(d); \ + (pos); \ + (pos) = dvb_service_list_descriptor_services_next(d, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_service_list_service* + dvb_service_list_descriptor_services_first(struct dvb_service_list_descriptor *d) +{ + if (d->d.len == 0) + return NULL; + + return (struct dvb_service_list_service *) + ((uint8_t*) d + sizeof(struct dvb_service_list_descriptor)); +} + +static inline struct dvb_service_list_service* + dvb_service_list_descriptor_services_next(struct dvb_service_list_descriptor *d, + struct dvb_service_list_service *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_service_list_service); + + if (next >= end) + return NULL; + + return (struct dvb_service_list_service *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |