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139 lines
4.6 KiB
139 lines
4.6 KiB
/*****************************************************************************
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* desc_46.h: ETSI EN 300 468 Descriptor 0x46: VBI teletext 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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*
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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_46_H__
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#define __BITSTREAM_DVB_DESC_46_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/mpeg/psi/desc_0a.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 0x46: VBI teletext descriptor
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*****************************************************************************/
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#define DESC46_HEADER_SIZE DESC_HEADER_SIZE
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#define DESC46_LANGUAGE_SIZE 5
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static inline void desc46_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x46);
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}
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static inline uint8_t *desc46_get_language(uint8_t *p_desc, uint8_t n)
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{
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uint8_t *p_desc_n = p_desc + DESC46_HEADER_SIZE + n * DESC46_LANGUAGE_SIZE;
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if (p_desc_n + DESC46_LANGUAGE_SIZE - p_desc
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> desc_get_length(p_desc) + DESC46_HEADER_SIZE)
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return NULL;
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return p_desc_n;
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}
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#define desc46n_set_code desc0an_set_code
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#define desc46n_get_code desc0an_get_code
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static inline void desc46n_set_teletexttype(uint8_t *p_desc_n, uint8_t i_type)
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{
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p_desc_n[3] &= ~0xfc;
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p_desc_n[3] |= (i_type << 3) & 0xfc;
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}
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static inline uint8_t desc46n_get_teletexttype(const uint8_t *p_desc_n)
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{
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return p_desc_n[3] >> 3;
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}
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static inline void desc46n_set_teletextmagazine(uint8_t *p_desc_n,
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uint8_t i_magazine)
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{
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p_desc_n[3] &= ~0x3;
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p_desc_n[3] |= (i_magazine & 0x3);
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}
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static inline uint8_t desc46n_get_teletextmagazine(const uint8_t *p_desc_n)
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{
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return p_desc_n[3] & 0x3;
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}
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static inline void desc46n_set_teletextpage(uint8_t *p_desc_n, uint8_t i_page)
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{
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p_desc_n[4] = i_page;
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}
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static inline uint8_t desc46n_get_teletextpage(const uint8_t *p_desc_n)
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{
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return p_desc_n[4];
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}
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static inline bool desc46_validate(const uint8_t *p_desc)
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{
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return !(desc_get_length(p_desc) % DESC46_LANGUAGE_SIZE);
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}
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static inline void desc46_print(uint8_t *p_desc, f_print pf_print,
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void *opaque, print_type_t i_print_type)
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{
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uint8_t j = 0;
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uint8_t *p_desc_n;
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while ((p_desc_n = desc46_get_language(p_desc, j)) != NULL) {
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j++;
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switch (i_print_type) {
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case PRINT_XML:
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pf_print(opaque,
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"<%s language=\"%3.3s\" type=\"0x%hhx\" mag=\"%hhu\" page=\"0x%hhx\"/>",
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desc_get_tag(p_desc) == 0x46 ? "VBI_TELX_DESC" : "TELX_DESC",
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(const char *)desc46n_get_code(p_desc_n),
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desc46n_get_teletexttype(p_desc_n),
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desc46n_get_teletextmagazine(p_desc_n),
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desc46n_get_teletextpage(p_desc_n));
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break;
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default:
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pf_print(opaque,
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" - desc %x telx language=%3.3s type=0x%hhx mag=%hhu page=0x%hhx",
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desc_get_tag(p_desc), (const char *)desc46n_get_code(p_desc_n),
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desc46n_get_teletexttype(p_desc_n),
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desc46n_get_teletextmagazine(p_desc_n),
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desc46n_get_teletextpage(p_desc_n));
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}
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}
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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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