diff options
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/application_signalling_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/application_signalling_descriptor.h')
-rw-r--r-- | lib/libucsi/dvb/application_signalling_descriptor.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/application_signalling_descriptor.h b/lib/libucsi/dvb/application_signalling_descriptor.h new file mode 100644 index 0000000..78211cf --- /dev/null +++ b/lib/libucsi/dvb/application_signalling_descriptor.h @@ -0,0 +1,124 @@ +/* + * 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_APPLICATION_SIGNALLING_DESCRIPTOR +#define _UCSI_DVB_APPLICATION_SIGNALLING_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include <libucsi/descriptor.h> +#include <libucsi/endianops.h> + +/** + * dvb_application_signalling_descriptor structure. + */ +struct dvb_application_signalling_descriptor { + struct descriptor d; + + /* struct dvb_application_signalling_entry entries[] */ +} __ucsi_packed; + +/** + * An entry in the entries field of a dvb_application_signalling_descriptor. + */ +struct dvb_application_signalling_entry { + uint16_t application_type; + EBIT2(uint8_t reserved : 3; , + uint8_t AIT_version_number : 5; ); +} __ucsi_packed; + +/** + * Process a dvb_application_signalling_descriptor. + * + * @param d Generic descriptor pointer. + * @return dvb_application_signalling_descriptor pointer, or NULL on error. + */ +static inline struct dvb_application_signalling_descriptor* + dvb_application_signalling_descriptor_codec(struct descriptor* d) +{ + uint32_t pos = 0; + uint32_t len = d->len; + uint8_t* buf = (uint8_t*) d + 2; + + pos += sizeof(struct dvb_application_signalling_descriptor) - 2; + if (len % sizeof(struct dvb_application_signalling_entry)) + return NULL; + + while(pos < len) { + bswap16(buf+pos); + pos+=3; + } + + return (struct dvb_application_signalling_descriptor*) d; +} + +/** + * Iterator for the entries field of a dvb_application_signalling_descriptor. + * + * @param d dvb_application_signalling_descriptor pointer. + * @param pos Variable containing a pointer to the current dvb_application_signalling_entry. + */ +#define dvb_application_signalling_descriptor_entries_for_each(d, pos) \ + for ((pos) = dvb_application_signalling_descriptor_entries_first(d); \ + (pos); \ + (pos) = dvb_application_signalling_descriptor_entries_next(d, pos)) + + + + + + + + + + +/******************************** PRIVATE CODE ********************************/ +static inline struct dvb_application_signalling_entry* + dvb_application_signalling_descriptor_entries_first(struct dvb_application_signalling_descriptor *d) +{ + if (d->d.len == 0) + return NULL; + + return (struct dvb_application_signalling_entry *) + ((uint8_t*) d + sizeof(struct dvb_application_signalling_descriptor)); +} + +static inline struct dvb_application_signalling_entry* + dvb_application_signalling_descriptor_entries_next(struct dvb_application_signalling_descriptor *d, + struct dvb_application_signalling_entry *pos) +{ + uint8_t *end = (uint8_t*) d + 2 + d->d.len; + uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_application_signalling_entry); + + if (next >= end) + return NULL; + + return (struct dvb_application_signalling_entry *) next; +} + +#ifdef __cplusplus +} +#endif + +#endif |