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/***************************************************************************** |
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* desc_6d.h: ETSI EN 300 468 Descriptor 0x6d: Cell frequency link 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_6D_H__ |
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#define __BITSTREAM_DVB_DESC_6D_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 0x6d: Cell frequency link descriptor |
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*****************************************************************************/ |
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#define DESC6D_HEADER_SIZE DESC_HEADER_SIZE |
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#define DESC6D_DATA_SIZE 7 |
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#define DESC6D_SUBCELL_SIZE 5 |
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static inline void desc6d_init(uint8_t *p_desc) |
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{ |
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desc_set_tag(p_desc, 0x6d); |
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} |
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static inline uint16_t desc6dn_get_cell_id(const uint8_t *p_desc_n) |
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{ |
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return (p_desc_n[0] << 8) | p_desc_n[1]; |
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} |
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static inline void desc6dn_set_cell_id(uint8_t *p_desc_n, uint16_t i_cell_id) |
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{ |
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p_desc_n[0] = (i_cell_id >> 8) & 0xff; |
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p_desc_n[1] = i_cell_id & 0xff; |
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} |
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static inline uint32_t desc6dn_get_frequency(const uint8_t *p_desc_n) |
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{ |
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return (p_desc_n[2] << 24) | (p_desc_n[3] << 16) | (p_desc_n[4] << 8) | p_desc_n[5]; |
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} |
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static inline void desc6dn_set_frequency(uint8_t *p_desc_n, uint16_t i_frequency) |
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{ |
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p_desc_n[2] = (i_frequency >> 24) & 0xff; |
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p_desc_n[3] = (i_frequency >> 16) & 0xff; |
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p_desc_n[4] = (i_frequency >> 8) & 0xff; |
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p_desc_n[5] = i_frequency & 0xff; |
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} |
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static inline uint8_t desc6dn_get_subcell_info_loop_length(const uint8_t *p_desc_n) |
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{ |
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return p_desc_n[6]; |
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} |
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static inline void desc6dn_set_subcell_info_loop_length(uint8_t *p_desc_n, uint8_t i_subcell_info_loop_length) |
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{ |
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p_desc_n[6] = i_subcell_info_loop_length; |
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} |
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/* Subcell loop */ |
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static inline uint8_t desc6dk_get_cell_id_extension(const uint8_t *p_desc_k) |
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{ |
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return p_desc_k[0]; |
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} |
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static inline void desc6dk_set_cell_id_extension(uint8_t *p_desc_k, uint8_t i_cell_id_extension) |
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{ |
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p_desc_k[0] = i_cell_id_extension; |
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} |
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static inline uint32_t desc6dk_get_transponder_frequency(const uint8_t *p_desc_k) |
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{ |
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return (p_desc_k[1] << 24) | (p_desc_k[2] << 16) | (p_desc_k[3] << 8) | p_desc_k[4]; |
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} |
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static inline void desc6dk_set_transponder_frequency(uint8_t *p_desc_k, uint32_t i_frequency) |
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{ |
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p_desc_k[1] = (i_frequency >> 24) & 0xff; |
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p_desc_k[2] = (i_frequency >> 16) & 0xff; |
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p_desc_k[3] = (i_frequency >> 8) & 0xff; |
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p_desc_k[4] = i_frequency & 0xff; |
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} |
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/* ----- */ |
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static inline uint8_t *desc6d_get_cell(uint8_t *p_desc, uint8_t n) |
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{ |
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uint8_t *p_desc_n = p_desc + DESC6D_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_desc6d_data_size = DESC6D_DATA_SIZE + desc6dn_get_subcell_info_loop_length(p_desc_n); |
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if (p_desc_n + i_desc6d_data_size - p_desc > i_desc_size) |
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return NULL; |
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p_desc_n += i_desc6d_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 uint8_t *desc6dn_get_subcell(uint8_t *p_desc_n, uint8_t k) |
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{ |
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int ofs = k * DESC6D_SUBCELL_SIZE; |
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if (ofs < desc6dn_get_subcell_info_loop_length(p_desc_n)) |
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return p_desc_n + DESC6D_DATA_SIZE + ofs; |
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else |
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return NULL; |
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} |
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static inline bool desc6d_validate(const uint8_t *p_desc) |
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{ |
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const uint8_t *p_desc_n = p_desc + DESC6D_HEADER_SIZE; |
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int i_desc_size = desc_get_length(p_desc); |
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while (i_desc_size > (DESC6D_HEADER_SIZE - DESC_HEADER_SIZE)) { |
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uint8_t i_desc6d_data_size = DESC6D_DATA_SIZE + desc6dn_get_subcell_info_loop_length(p_desc_n); |
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i_desc_size -= i_desc6d_data_size; |
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p_desc_n += i_desc6d_data_size; |
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} |
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return i_desc_size == (DESC6D_HEADER_SIZE - DESC_HEADER_SIZE); |
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} |
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static inline void desc6d_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 n = 0; |
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uint8_t *p_desc_n; |
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while ((p_desc_n = desc6d_get_cell(p_desc, n++)) != NULL) { |
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uint8_t k = 0; |
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uint8_t *p_desc_k; |
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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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"<CELL_FREQUENCY_LINK_DESC cell_id=\"%u\" frequency=\"%u\">", |
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desc6dn_get_cell_id(p_desc_n), |
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desc6dn_get_frequency(p_desc_n) |
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); |
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while ((p_desc_k = desc6dn_get_subcell(p_desc_n, k++)) != NULL) { |
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pf_print(opaque, |
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"<SUBCELL_FREQUENCY_LINK_INFO cell_id_extension=\"%u\" transponder_frequency=\"%u\"/>", |
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desc6dk_get_cell_id_extension(p_desc_k), |
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desc6dk_get_transponder_frequency(p_desc_k) |
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); |
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} |
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pf_print(opaque, "</CELL_FREQUENCY_LINK_DESC>"); |
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break; |
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default: |
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pf_print(opaque, |
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" - desc 6d cell_frequency_link cell_id=%u frequency=%u", |
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desc6dn_get_cell_id(p_desc_n), |
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desc6dn_get_frequency(p_desc_n) |
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); |
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while ((p_desc_k = desc6dn_get_subcell(p_desc_n, k++)) != NULL) { |
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pf_print(opaque, |
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" - subcell_frequency_link cell_id_extension=%u" |
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" transponder_frequency=%u", |
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desc6dk_get_cell_id_extension(p_desc_k), |
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desc6dk_get_transponder_frequency(p_desc_k) |
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); |
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} |
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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 |