/* * 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_SUBTITLING_DESCRIPTOR #define _UCSI_DVB_SUBTITLING_DESCRIPTOR 1 #ifdef __cplusplus extern "C" { #endif #include #include #include /** * dvb_subtitling_descriptor structure. */ struct dvb_subtitling_descriptor { struct descriptor d; /* struct dvb_subtitling_entry subtitles[] */ } __ucsi_packed; /** * An entry in the subtitles field of the a dvb_subtitling_descriptor. */ struct dvb_subtitling_entry { iso639lang_t language_code; uint8_t subtitling_type; uint16_t composition_page_id; uint16_t ancillary_page_id; } __ucsi_packed; /** * Process a dvb_subtitling_descriptor. * * @param d Generic descriptor. * @return dvb_subtitling_descriptor pointer, or NULL on error. */ static inline struct dvb_subtitling_descriptor* dvb_subtitling_descriptor_codec(struct descriptor* d) { uint32_t pos = 0; uint8_t* ptr = (uint8_t*) d + 2; uint32_t len = d->len; if (len % sizeof(struct dvb_subtitling_entry)) return NULL; while(pos < len) { bswap16(ptr+pos+4); bswap16(ptr+pos+6); pos += sizeof(struct dvb_subtitling_entry); } return (struct dvb_subtitling_descriptor*) d; } /** * Iterator for subtitles field in dvb_subtitling_descriptor. * * @param d dvb_subtitling_descriptor pointer. * @param pos Variable containing a pointer to current dvb_subtitling_entry. */ #define dvb_subtitling_descriptor_subtitles_for_each(d, pos) \ for ((pos) = dvb_subtitling_descriptor_subtitles_first(d); \ (pos); \ (pos) = dvb_subtitling_descriptor_subtitles_next(d, pos)) /******************************** PRIVATE CODE ********************************/ static inline struct dvb_subtitling_entry* dvb_subtitling_descriptor_subtitles_first(struct dvb_subtitling_descriptor *d) { if (d->d.len == 0) return NULL; return (struct dvb_subtitling_entry *) ((uint8_t*) d + sizeof(struct dvb_subtitling_descriptor)); } static inline struct dvb_subtitling_entry* dvb_subtitling_descriptor_subtitles_next(struct dvb_subtitling_descriptor *d, struct dvb_subtitling_entry *pos) { uint8_t *end = (uint8_t*) d + 2 + d->d.len; uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_subtitling_entry); if (next >= end) return NULL; return (struct dvb_subtitling_entry *) next; } #ifdef __cplusplus } #endif #endif n/0%2bgit20131201.52a7b0a-1&id=472c327ffa614bd53ee8a1698d7c9c802ac8f6cc'>dk-Copenhagen-AFDK

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