/***************************************************************************** * desc_6d.h: ETSI EN 300 468 Descriptor 0x6d: Cell frequency link descriptor ***************************************************************************** * Copyright (C) 2011 Unix Solutions Ltd. * * Authors: Georgi Chorbadzhiyski * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject * to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *****************************************************************************/ /* * Normative references: * - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems) */ #ifndef __BITSTREAM_DVB_DESC_6D_H__ #define __BITSTREAM_DVB_DESC_6D_H__ #include #include #ifdef __cplusplus extern "C" { #endif /***************************************************************************** * Descriptor 0x6d: Cell frequency link descriptor *****************************************************************************/ #define DESC6D_HEADER_SIZE DESC_HEADER_SIZE #define DESC6D_DATA_SIZE 7 #define DESC6D_SUBCELL_SIZE 5 static inline void desc6d_init(uint8_t *p_desc) { desc_set_tag(p_desc, 0x6d); } static inline uint16_t desc6dn_get_cell_id(const uint8_t *p_desc_n) { return (p_desc_n[0] << 8) | p_desc_n[1]; } static inline void desc6dn_set_cell_id(uint8_t *p_desc_n, uint16_t i_cell_id) { p_desc_n[0] = (i_cell_id >> 8) & 0xff; p_desc_n[1] = i_cell_id & 0xff; } static inline uint32_t desc6dn_get_frequency(const uint8_t *p_desc_n) { return (p_desc_n[2] << 24) | (p_desc_n[3] << 16) | (p_desc_n[4] << 8) | p_desc_n[5]; } static inline void desc6dn_set_frequency(uint8_t *p_desc_n, uint16_t i_frequency) { p_desc_n[2] = (i_frequency >> 24) & 0xff; p_desc_n[3] = (i_frequency >> 16) & 0xff; p_desc_n[4] = (i_frequency >> 8) & 0xff; p_desc_n[5] = i_frequency & 0xff; } static inline uint8_t desc6dn_get_subcell_info_loop_length(const uint8_t *p_desc_n) { return p_desc_n[6]; } static inline void desc6dn_set_subcell_info_loop_length(uint8_t *p_desc_n, uint8_t i_subcell_info_loop_length) { p_desc_n[6] = i_subcell_info_loop_length; } /* Subcell loop */ static inline uint8_t desc6dk_get_cell_id_extension(const uint8_t *p_desc_k) { return p_desc_k[0]; } static inline void desc6dk_set_cell_id_extension(uint8_t *p_desc_k, uint8_t i_cell_id_extension) { p_desc_k[0] = i_cell_id_extension; } static inline uint32_t desc6dk_get_transponder_frequency(const uint8_t *p_desc_k) { return (p_desc_k[1] << 24) | (p_desc_k[2] << 16) | (p_desc_k[3] << 8) | p_desc_k[4]; } static inline void desc6dk_set_transponder_frequency(uint8_t *p_desc_k, uint32_t i_frequency) { p_desc_k[1] = (i_frequency >> 24) & 0xff; p_desc_k[2] = (i_frequency >> 16) & 0xff; p_desc_k[3] = (i_frequency >> 8) & 0xff; p_desc_k[4] = i_frequency & 0xff; } /* ----- */ static inline uint8_t *desc6d_get_cell(uint8_t *p_desc, uint8_t n) { uint8_t *p_desc_n = p_desc + DESC6D_HEADER_SIZE; uint8_t i_desc_size = desc_get_length(p_desc); while (n) { uint8_t i_desc6d_data_size = DESC6D_DATA_SIZE + desc6dn_get_subcell_info_loop_length(p_desc_n); if (p_desc_n + i_desc6d_data_size - p_desc > i_desc_size) return NULL; p_desc_n += i_desc6d_data_size; n--; } if (p_desc_n - p_desc > i_desc_size) return NULL; return p_desc_n; } static inline uint8_t *desc6dn_get_subcell(uint8_t *p_desc_n, uint8_t k) { int ofs = k * DESC6D_SUBCELL_SIZE; if (ofs < desc6dn_get_subcell_info_loop_length(p_desc_n)) return p_desc_n + DESC6D_DATA_SIZE + ofs; else return NULL; } static inline bool desc6d_validate(const uint8_t *p_desc) { const uint8_t *p_desc_n = p_desc + DESC6D_HEADER_SIZE; int i_desc_size = desc_get_length(p_desc); while (i_desc_size > (DESC6D_HEADER_SIZE - DESC_HEADER_SIZE)) { uint8_t i_desc6d_data_size = DESC6D_DATA_SIZE + desc6dn_get_subcell_info_loop_length(p_desc_n); i_desc_size -= i_desc6d_data_size; p_desc_n += i_desc6d_data_size; } return i_desc_size == (DESC6D_HEADER_SIZE - DESC_HEADER_SIZE); } static inline void desc6d_print(uint8_t *p_desc, f_print pf_print, void *opaque, print_type_t i_print_type) { uint8_t n = 0; uint8_t *p_desc_n; while ((p_desc_n = desc6d_get_cell(p_desc, n++)) != NULL) { uint8_t k = 0; uint8_t *p_desc_k; switch (i_print_type) { case PRINT_XML: pf_print(opaque, "", desc6dn_get_cell_id(p_desc_n), desc6dn_get_frequency(p_desc_n) ); while ((p_desc_k = desc6dn_get_subcell(p_desc_n, k++)) != NULL) { pf_print(opaque, "", desc6dk_get_cell_id_extension(p_desc_k), desc6dk_get_transponder_frequency(p_desc_k) ); } pf_print(opaque, ""); break; default: pf_print(opaque, " - desc 6d cell_frequency_link cell_id=%u frequency=%u", desc6dn_get_cell_id(p_desc_n), desc6dn_get_frequency(p_desc_n) ); while ((p_desc_k = desc6dn_get_subcell(p_desc_n, k++)) != NULL) { pf_print(opaque, " - subcell_frequency_link cell_id_extension=%u" " transponder_frequency=%u", desc6dk_get_cell_id_extension(p_desc_k), desc6dk_get_transponder_frequency(p_desc_k) ); } } } } #ifdef __cplusplus } #endif #endif