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162 lines
5.6 KiB
162 lines
5.6 KiB
/*****************************************************************************
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* desc_4d.h: ETSI EN 300 468 Descriptor 0x4d: Short event descriptor
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*****************************************************************************
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* Copyright (C) 2011 Unix Solutions Ltd.
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*
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* Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_DESC_4D_H__
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#define __BITSTREAM_DVB_DESC_4D_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#include <bitstream/dvb/si/numbers.h>
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#include <bitstream/dvb/si/strings.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*****************************************************************************
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* Descriptor 0x4d: Short event descriptor
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*****************************************************************************/
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#define DESC4D_HEADER_SIZE (DESC_HEADER_SIZE + 3)
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static inline void desc4d_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x4d);
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}
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static inline const uint8_t *desc4d_get_lang(const uint8_t *p_desc)
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{
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return p_desc + DESC_HEADER_SIZE;
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}
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static inline void desc4d_set_lang(uint8_t *p_desc, const uint8_t p_lang[3])
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{
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p_desc[2] = p_lang[0];
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p_desc[3] = p_lang[1];
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p_desc[4] = p_lang[2];
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}
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static inline const uint8_t *desc4d_get_event_name(const uint8_t *p_desc,
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uint8_t *pi_length)
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{
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const uint8_t *p = p_desc + DESC4D_HEADER_SIZE;
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*pi_length = p[0];
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return p + 1;
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}
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static inline void desc4d_set_event_name(uint8_t *p_desc,
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const uint8_t *p_event_name,
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uint8_t i_length)
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{
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uint8_t *p = p_desc + DESC4D_HEADER_SIZE;
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p[0] = i_length;
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memcpy(p + 1, p_event_name, i_length);
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}
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static inline uint8_t *desc4d_get_text(const uint8_t *p_desc,
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uint8_t *pi_length)
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{
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const uint8_t *p = (uint8_t *)p_desc + DESC4D_HEADER_SIZE + 1 + p_desc[5];
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*pi_length = p[0];
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return (uint8_t *)p + 1;
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}
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static inline void desc4d_set_text(uint8_t *p_desc,
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const uint8_t *p_text,
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uint8_t i_length)
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{
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uint8_t *p = p_desc + DESC4D_HEADER_SIZE + 1 + p_desc[5];
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p[0] = i_length;
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memcpy(p + 1, p_text, i_length);
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}
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static inline void desc4d_set_length(uint8_t *p_desc)
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{
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uint8_t i_event_name_len, i_text_len;
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desc4d_get_event_name(p_desc, &i_event_name_len);
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desc4d_get_text(p_desc, &i_text_len);
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desc_set_length(p_desc, DESC4D_HEADER_SIZE - DESC_HEADER_SIZE
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+ 1 + i_event_name_len
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+ 1 + i_text_len);
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}
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static inline bool desc4d_validate(const uint8_t *p_desc)
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{
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uint8_t i_length = desc_get_length(p_desc);
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const uint8_t *p = p_desc + DESC4D_HEADER_SIZE;
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p += *p + 1;
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if (DESC4D_HEADER_SIZE + 2 > i_length + DESC_HEADER_SIZE ||
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p + 1 - p_desc > i_length + DESC_HEADER_SIZE)
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return false;
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p += *p + 1;
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if (p - p_desc > i_length + DESC_HEADER_SIZE)
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return false;
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return true;
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}
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static inline void desc4d_print(const uint8_t *p_desc,
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f_print pf_print, void *print_opaque,
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f_iconv pf_iconv, void *iconv_opaque,
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print_type_t i_print_type)
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{
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uint8_t i_event_name_length, i_text_length;
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const uint8_t *p_event_name = desc4d_get_event_name(p_desc, &i_event_name_length);
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const uint8_t *p_text = desc4d_get_text(p_desc, &i_text_length);
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char *psz_event_name = dvb_string_get(p_event_name, i_event_name_length,
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pf_iconv, iconv_opaque);
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char *psz_text = dvb_string_get(p_text, i_text_length,
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pf_iconv, iconv_opaque);
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switch (i_print_type) {
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case PRINT_XML:
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psz_event_name = dvb_string_xml_escape(psz_event_name);
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psz_text = dvb_string_xml_escape(psz_text);
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pf_print(print_opaque,
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"<SHORT_EVENT_DESC lang=\"%3.3s\" event_name=\"%s\" text=\"%s\"/>",
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(char *)desc4d_get_lang(p_desc), psz_event_name, psz_text);
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break;
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default:
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pf_print(print_opaque,
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" - desc 4d short_event lang=%3.3s event_name=\"%s\" text=\"%s\"",
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(char *)desc4d_get_lang(p_desc), psz_event_name, psz_text);
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}
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free(psz_event_name);
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free(psz_text);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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