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160 lines
5.5 KiB
160 lines
5.5 KiB
/*****************************************************************************
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* desc_48.h: ETSI EN 300 468 Descriptor 0x48: Service descriptor
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*****************************************************************************
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* Copyright (C) 2009-2010 VideoLAN
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* 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_48_H__
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#define __BITSTREAM_DVB_DESC_48_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/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 0x48: Service descriptor
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*****************************************************************************/
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#define DESC48_HEADER_SIZE (DESC_HEADER_SIZE + 1)
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static inline void desc48_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x48);
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}
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static inline void desc48_set_type(uint8_t *p_desc, uint8_t i_type)
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{
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p_desc[2] = i_type;
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}
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static inline uint8_t desc48_get_type(const uint8_t *p_desc)
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{
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return p_desc[2];
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}
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static inline void desc48_set_provider(uint8_t *p_desc,
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const uint8_t *p_provider,
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uint8_t i_length)
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{
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uint8_t *p = p_desc + DESC48_HEADER_SIZE;
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p[0] = i_length;
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memcpy(p + 1, p_provider, i_length);
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}
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static inline uint8_t *desc48_get_provider(const uint8_t *p_desc,
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uint8_t *pi_length)
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{
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uint8_t *p = p_desc + DESC48_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 desc48_set_service(uint8_t *p_desc,
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const uint8_t *p_service,
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uint8_t i_length)
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{
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uint8_t *p = p_desc + DESC48_HEADER_SIZE + 1 + p_desc[3];
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p[0] = i_length;
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memcpy(p + 1, p_service, i_length);
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}
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static inline uint8_t *desc48_get_service(const uint8_t *p_desc,
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uint8_t *pi_length)
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{
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uint8_t *p = (uint8_t *)p_desc + DESC48_HEADER_SIZE + 1 + p_desc[3];
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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 desc48_set_length(uint8_t *p_desc)
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{
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uint8_t i_provider_len, i_service_len;
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desc48_get_provider(p_desc, &i_provider_len);
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desc48_get_service(p_desc, &i_service_len);
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desc_set_length(p_desc, DESC48_HEADER_SIZE - DESC_HEADER_SIZE
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+ 1 + i_provider_len
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+ 1 + i_service_len);
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}
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static inline bool desc48_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 + DESC48_HEADER_SIZE;
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p += *p + 1;
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if (DESC48_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 desc48_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_provider_length, i_service_length;
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const uint8_t *p_provider = desc48_get_provider(p_desc, &i_provider_length);
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const uint8_t *p_service = desc48_get_service(p_desc, &i_service_length);
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char *psz_provider = dvb_string_get(p_provider, i_provider_length,
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pf_iconv, iconv_opaque);
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char *psz_service = dvb_string_get(p_service, i_service_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_provider = dvb_string_xml_escape(psz_provider);
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psz_service = dvb_string_xml_escape(psz_service);
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pf_print(print_opaque,
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"<SERVICE_DESC type=\"0x%hhx\" provider=\"%s\" service=\"%s\"/>",
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desc48_get_type(p_desc), psz_provider, psz_service);
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break;
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default:
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pf_print(print_opaque,
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" - desc 48 service type=0x%hhx provider=\"%s\" service=\"%s\"",
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desc48_get_type(p_desc), psz_provider, psz_service);
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}
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free(psz_provider);
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free(psz_service);
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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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