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367 lines
12 KiB
367 lines
12 KiB
/*****************************************************************************
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* desc_51.h: ETSI EN 300 518 Descriptor 0x51: Mosaic 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 300 518 V1.11.1 (2010-04) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_DESC_51_H__
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#define __BITSTREAM_DVB_DESC_51_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/descriptors.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 0x51: Mosaic descriptor
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*****************************************************************************/
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#define DESC51_HEADER_SIZE (DESC_HEADER_SIZE + 1)
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#define DESC51_DATA_SIZE 4
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static inline void desc51_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x51);
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desc_set_length(p_desc, 1);
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p_desc[2] = 0x08;
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}
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static inline bool desc51_get_mosaic_entry_point(const uint8_t *p_desc)
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{
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return (p_desc[2] & 0x80) == 0x80;
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}
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static inline void desc51_set_mosaic_entry_point(uint8_t *p_desc, bool b_entry_point)
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{
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p_desc[2] = b_entry_point ? (p_desc[2] | 0x80) : (p_desc[2] &~ 0x80);
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}
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static inline uint8_t desc51_get_horizontal_cells(const uint8_t *p_desc)
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{
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return (p_desc[2] & 0x70) >> 4;
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}
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static inline void desc51_set_horizontal_cells(uint8_t *p_desc, uint8_t i_hcells)
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{
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p_desc[2] = (p_desc[2] & 0x8f) | ((i_hcells & 0x07) << 4);
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}
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static inline uint8_t desc51_get_vertical_cells(const uint8_t *p_desc)
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{
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return (p_desc[2] & 0x07);
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}
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static inline void desc51_set_vertical_cells(uint8_t *p_desc, uint8_t i_vcells)
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{
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p_desc[2] = (p_desc[2] & 0xf8) | (i_vcells & 0x07);
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}
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static inline uint8_t desc51n_get_logical_cell_id(const uint8_t *p_desc_n)
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{
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return p_desc_n[0] >> 2;
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}
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static inline void desc51n_set_logical_cell_id(uint8_t *p_desc_n, uint8_t i_logical_cell_id)
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{
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p_desc_n[0] = (i_logical_cell_id << 2) | 0x03;
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}
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static inline uint8_t desc51n_get_logical_cell_presentation_info(const uint8_t *p_desc_n)
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{
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return p_desc_n[1] & 0x07;
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}
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static inline void desc51n_set_logical_cell_presentation_info(uint8_t *p_desc_n, uint8_t i_lc_presentation_info)
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{
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p_desc_n[1] = (i_lc_presentation_info & 0x07) | 0xf8;
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}
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static inline char *desc51_get_logical_cell_presentation_info_txt(uint8_t i_lcp_info)
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{
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return i_lcp_info == 0x00 ? "undefined" :
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i_lcp_info == 0x01 ? "video" :
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i_lcp_info == 0x02 ? "still picture" :
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i_lcp_info == 0x03 ? "graphics/text" : "reserved";
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}
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static inline uint8_t desc51n_get_elementary_cell_field_length(const uint8_t *p_desc_n)
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{
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return p_desc_n[2];
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}
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static inline void desc51n_set_elementary_cell_field_length(uint8_t *p_desc_n, uint8_t i_length)
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{
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p_desc_n[2] = i_length;
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}
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static inline uint8_t desc51n_get_elementary_cell_id(const uint8_t *p_desc_n, uint8_t idx)
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{
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return p_desc_n[3 + idx] & 0x3f;
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}
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static inline void desc51n_set_elementary_cell_id(uint8_t *p_desc_n, uint8_t idx, uint8_t i_elementary_cell_id)
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{
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p_desc_n[3 + idx] = 0xc0 | (i_elementary_cell_id & 0x3f);
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}
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static inline uint8_t desc51n_get_cell_linkage_info(const uint8_t *p_desc_n)
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{
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return p_desc_n[3 + desc51n_get_elementary_cell_field_length(p_desc_n)];
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}
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static inline void desc51n_set_cell_linkage_info(uint8_t *p_desc_n, uint8_t i_cell_linkage_info)
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{
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p_desc_n[3 + desc51n_get_elementary_cell_field_length(p_desc_n)] = i_cell_linkage_info;
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}
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static inline char *desc51_get_cell_linkage_info_txt(uint8_t i_icl_info)
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{
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return i_icl_info == 0x00 ? "undefined" :
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i_icl_info == 0x01 ? "bouquet related" :
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i_icl_info == 0x02 ? "service related" :
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i_icl_info == 0x03 ? "other mosaic related" :
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i_icl_info == 0x04 ? "event related" : "reserved";
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}
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#define init_link_n(__const) \
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__const uint8_t *link_n; \
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uint8_t i_cell_linkage_info = desc51n_get_cell_linkage_info(p_desc_n); \
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link_n = p_desc_n + 4 + desc51n_get_elementary_cell_field_length(p_desc_n)
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static inline uint16_t desc51n_get_bouquet_id(const uint8_t *p_desc_n)
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{
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init_link_n(const);
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if (i_cell_linkage_info != 1) return 0;
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return (link_n[0] << 8) | link_n[1];
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}
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static inline void desc51n_set_bouquet_id(uint8_t *p_desc_n, uint16_t i_bouquet_id)
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{
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init_link_n();
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if (i_cell_linkage_info != 1) return;
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link_n[0] = (i_bouquet_id >> 8) & 0xff;
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link_n[1] = i_bouquet_id & 0xff;
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}
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static inline uint16_t desc51n_get_onid(const uint8_t *p_desc_n)
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{
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init_link_n(const);
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return 0;
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return (link_n[0] << 8) | link_n[1];
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}
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static inline void desc51n_set_onid(uint8_t *p_desc_n, uint16_t i_onid)
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{
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init_link_n();
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return;
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link_n[0] = (i_onid >> 8) & 0xff;
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link_n[1] = i_onid & 0xff;
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}
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static inline uint16_t desc51n_get_tsid(const uint8_t *p_desc_n)
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{
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init_link_n(const);
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return 0;
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return (link_n[2] << 8) | link_n[3];
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}
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static inline void desc51n_set_tsid(uint8_t *p_desc_n, uint16_t i_tsid)
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{
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init_link_n();
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return;
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link_n[2] = (i_tsid >> 8) & 0xff;
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link_n[3] = i_tsid & 0xff;
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}
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static inline uint16_t desc51n_get_sid(const uint8_t *p_desc_n)
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{
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init_link_n(const);
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return 0;
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return (link_n[4] << 8) | link_n[5];
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}
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static inline void desc51n_set_sid(uint8_t *p_desc_n, uint16_t i_sid)
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{
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init_link_n();
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if (i_cell_linkage_info < 2 || i_cell_linkage_info > 4) return;
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link_n[4] = (i_sid >> 8) & 0xff;
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link_n[5] = i_sid & 0xff;
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}
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static inline uint16_t desc51n_get_event_id(const uint8_t *p_desc_n)
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{
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init_link_n(const);
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if (i_cell_linkage_info != 4) return 0;
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return (link_n[6] << 8) | link_n[7];
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}
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static inline void desc51n_set_event_id(uint8_t *p_desc_n, uint16_t i_event_id)
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{
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init_link_n();
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if (i_cell_linkage_info != 4) return;
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link_n[6] = (i_event_id >> 8) & 0xff;
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link_n[7] = i_event_id & 0xff;
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}
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#undef init_link_n
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static inline uint8_t *desc51_get_logical_cell(uint8_t *p_desc, uint8_t n)
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{
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uint8_t *p_desc_n = p_desc + DESC51_HEADER_SIZE;
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uint8_t i_desc_size = desc_get_length(p_desc);
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while (n) {
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uint8_t i_desc51_data_size = DESC51_DATA_SIZE + desc51n_get_elementary_cell_field_length(p_desc_n);
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switch (desc51n_get_cell_linkage_info(p_desc_n)) {
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case 1: i_desc51_data_size += 2; break;
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case 2: i_desc51_data_size += 6; break;
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case 3: i_desc51_data_size += 6; break;
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case 4: i_desc51_data_size += 8; break;
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}
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if (p_desc_n + i_desc51_data_size - p_desc > i_desc_size)
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return NULL;
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p_desc_n += i_desc51_data_size;
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n--;
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}
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if (p_desc_n - p_desc > i_desc_size)
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return NULL;
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return p_desc_n;
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}
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static inline bool desc51_validate(const uint8_t *p_desc)
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{
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const uint8_t *p_desc_n = p_desc + DESC51_HEADER_SIZE;
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int i_desc_size = desc_get_length(p_desc);
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while (i_desc_size > (DESC51_HEADER_SIZE - DESC_HEADER_SIZE)) {
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uint8_t i_desc51_data_size = DESC51_DATA_SIZE + desc51n_get_elementary_cell_field_length(p_desc_n);
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switch (desc51n_get_cell_linkage_info(p_desc_n)) {
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case 1: i_desc51_data_size += 2; break;
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case 2: i_desc51_data_size += 6; break;
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case 3: i_desc51_data_size += 6; break;
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case 4: i_desc51_data_size += 8; break;
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}
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i_desc_size -= i_desc51_data_size;
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p_desc_n += i_desc51_data_size;
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}
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return i_desc_size == (DESC51_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline void desc51_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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if (i_print_type == PRINT_XML)
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pf_print(opaque,
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"<MOSAIC_DESC entry_point=\"%u\" horizontal_elementary_cells=\"%u\" vertical_elementary_cells=\"%u\">",
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desc51_get_mosaic_entry_point(p_desc),
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desc51_get_horizontal_cells(p_desc),
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desc51_get_vertical_cells(p_desc)
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);
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else
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pf_print(opaque,
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" - desc 51 mosaic entry_point=%u horizontal_elementary_cells=%u vertical_elementary_cells=%u",
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desc51_get_mosaic_entry_point(p_desc),
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desc51_get_horizontal_cells(p_desc),
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desc51_get_vertical_cells(p_desc)
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);
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while ((p_desc_n = desc51_get_logical_cell(p_desc, j++)) != NULL) {
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uint8_t k;
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uint8_t i_present_info = desc51n_get_logical_cell_presentation_info(p_desc_n);
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uint8_t i_el_cell_len = desc51n_get_elementary_cell_field_length(p_desc_n);
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uint8_t i_cell_linkage = desc51n_get_cell_linkage_info(p_desc_n);
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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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"<MOSAIC_LOGICAL_CELL cell_id=\"%u\" presentation_info=\"%u\""
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" presentation_info_txt=\"%s\" cell_linkage=\"%u\""
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" cell_linkage_txt=\"%s\" bouquet_id=\"%u\" onid=\"%u\""
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" tsid=\"%u\" sid=\"%u\" event_id=\"%u\">",
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desc51n_get_logical_cell_id(p_desc_n),
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i_present_info,
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desc51_get_logical_cell_presentation_info_txt(i_present_info),
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i_cell_linkage,
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desc51_get_cell_linkage_info_txt(i_cell_linkage),
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desc51n_get_bouquet_id(p_desc_n),
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desc51n_get_onid(p_desc_n),
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desc51n_get_tsid(p_desc_n),
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desc51n_get_sid(p_desc_n),
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desc51n_get_event_id(p_desc_n)
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);
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for (k = 0; k < i_el_cell_len; k++) {
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pf_print(opaque,
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"<MOSAIC_ELEMENTARY_CELL cell_id=\"%u\"/>",
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desc51n_get_elementary_cell_id(p_desc_n, k));
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}
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pf_print(opaque, "</MOSAIC_LOGICAL_CELL>");
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break;
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default:
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pf_print(opaque,
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" - logical_cell cell_id=%u presentation_info=%u"
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" presentation_info_txt=\"%s\" cell_linkage=%u"
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" cell_linkage_txt=\"%s\" bouquet_id=%u onid=%u"
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" tsid=%u sid=%u event_id=%u",
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desc51n_get_logical_cell_id(p_desc_n),
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i_present_info,
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desc51_get_logical_cell_presentation_info_txt(i_present_info),
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i_cell_linkage,
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desc51_get_cell_linkage_info_txt(i_cell_linkage),
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desc51n_get_bouquet_id(p_desc_n),
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desc51n_get_onid(p_desc_n),
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desc51n_get_tsid(p_desc_n),
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desc51n_get_sid(p_desc_n),
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desc51n_get_event_id(p_desc_n)
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);
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for (k = 0; k < i_el_cell_len; k++) {
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pf_print(opaque,
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" - elementary_cell cell_id=%u",
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desc51n_get_elementary_cell_id(p_desc_n, k));
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}
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}
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}
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if (i_print_type == PRINT_XML)
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pf_print(opaque, "</MOSAIC_DESC>");
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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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