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336
src/rds.h
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336
src/rds.h
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/*
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* mpxgen - FM multiplex encoder with Stereo and RDS
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* Copyright (C) 2019 Anthony96922
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef RDS_H
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#define RDS_H
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/* The RDS error-detection code generator polynomial is
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* x^10 + x^8 + x^7 + x^5 + x^4 + x^3 + x^0
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*/
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#define POLY 0x1B9
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#define POLY_DEG 10
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#define BLOCK_SIZE 16
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#define GROUP_LENGTH 4
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#define BITS_PER_GROUP (GROUP_LENGTH * (BLOCK_SIZE + POLY_DEG))
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#define RDS_SAMPLE_RATE 190000
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#define SAMPLES_PER_BIT 160
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#define FILTER_SIZE 1120
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#define SAMPLE_BUFFER_SIZE (SAMPLES_PER_BIT + FILTER_SIZE)
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/* Text items
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*
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*/
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#define RT_LENGTH 64
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#define PS_LENGTH 8
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#define PTYN_LENGTH 8
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#define LPS_LENGTH 32
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/* AF list size
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*
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*/
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#define MAX_AFS 25
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typedef struct rds_af_t {
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uint8_t num_entries;
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uint8_t num_afs;
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uint8_t afs[MAX_AFS];
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} rds_af_t;
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/* AF codes */
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#define AF_CODE_FILLER 205
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#define AF_CODE_NO_AF 224
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#define AF_CODE_NUM_AFS_BASE AF_CODE_NO_AF
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#define AF_CODE_LFMF_FOLLOWS 250
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typedef struct rds_params_t {
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uint16_t pi; /*Program Identification*/
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uint16_t lic; /* Language Identification code. lic should have 12 bits, 16 is the closest */
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uint8_t ecc; /* Extended Country Code*/
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uint8_t ta; /* Traffic Annoucement*/
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uint8_t pty; /* Program Type */
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uint8_t tp; /* Traffic Program */
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uint8_t ms; /* Music/Speech */
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uint8_t di; /* Decoder ID */
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/* Program Service */
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unsigned char ps[PS_LENGTH];
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/* Traffic PS */
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uint8_t traffic_ps_on;
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unsigned char tps[PS_LENGTH];
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/* Radio Text */
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unsigned char rt1[RT_LENGTH];
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/* Program Type Name */
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unsigned char ptyn[PTYN_LENGTH];
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/* Alternative Frequencies */
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struct rds_af_t af;
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/* Clock-time */
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uint8_t ct;
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/* Long PS */
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unsigned char lps[LPS_LENGTH];
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/* Program Item Number */
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uint8_t pin_day;
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uint8_t pin_hour;
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uint8_t pin_minute;
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#ifdef RDS2
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/* RDS2 image path*/
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char rds2_image_path[51];
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#endif
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} rds_params_t;
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/* Here, the first member of the struct must be a scalar to avoid a
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warning on -Wmissing-braces with GCC < 4.8.3
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(bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119)
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*/
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/* Group type
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*
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* 0-15
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*/
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#define GROUP_TYPE_0 ( 0 << 4)
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#define GROUP_TYPE_1 ( 1 << 4)
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#define GROUP_TYPE_2 ( 2 << 4)
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#define GROUP_TYPE_3 ( 3 << 4)
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#define GROUP_TYPE_4 ( 4 << 4)
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#define GROUP_TYPE_5 ( 5 << 4)
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#define GROUP_TYPE_6 ( 6 << 4)
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#define GROUP_TYPE_7 ( 7 << 4)
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#define GROUP_TYPE_8 ( 8 << 4)
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#define GROUP_TYPE_9 ( 9 << 4)
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#define GROUP_TYPE_10 (10 << 4)
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#define GROUP_TYPE_11 (11 << 4)
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#define GROUP_TYPE_12 (12 << 4)
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#define GROUP_TYPE_13 (13 << 4)
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#define GROUP_TYPE_14 (14 << 4)
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#define GROUP_TYPE_15 (15 << 4)
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/* Group versions
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*
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* The first 4 bits are the group number and the remaining 4 are
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* the group version
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*/
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#define GROUP_VER_A 0
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#define GROUP_VER_B 1
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/* Version A groups */
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#define GROUP_0A (GROUP_TYPE_0 | GROUP_VER_A)
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#define GROUP_1A (GROUP_TYPE_1 | GROUP_VER_A)
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#define GROUP_2A (GROUP_TYPE_2 | GROUP_VER_A)
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#define GROUP_3A (GROUP_TYPE_3 | GROUP_VER_A)
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#define GROUP_4A (GROUP_TYPE_4 | GROUP_VER_A)
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#define GROUP_5A (GROUP_TYPE_5 | GROUP_VER_A)
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#define GROUP_6A (GROUP_TYPE_6 | GROUP_VER_A)
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#define GROUP_7A (GROUP_TYPE_7 | GROUP_VER_A)
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#define GROUP_8A (GROUP_TYPE_8 | GROUP_VER_A)
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#define GROUP_9A (GROUP_TYPE_9 | GROUP_VER_A)
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#define GROUP_10A (GROUP_TYPE_10 | GROUP_VER_A)
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#define GROUP_11A (GROUP_TYPE_11 | GROUP_VER_A)
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#define GROUP_12A (GROUP_TYPE_12 | GROUP_VER_A)
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#define GROUP_13A (GROUP_TYPE_13 | GROUP_VER_A)
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#define GROUP_14A (GROUP_TYPE_14 | GROUP_VER_A)
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#define GROUP_15A (GROUP_TYPE_15 | GROUP_VER_A)
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/* Version B groups */
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#define GROUP_0B (GROUP_TYPE_0 | GROUP_VER_B)
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#define GROUP_1B (GROUP_TYPE_1 | GROUP_VER_B)
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#define GROUP_2B (GROUP_TYPE_2 | GROUP_VER_B)
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#define GROUP_3B (GROUP_TYPE_3 | GROUP_VER_B)
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#define GROUP_4B (GROUP_TYPE_4 | GROUP_VER_B)
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#define GROUP_5B (GROUP_TYPE_5 | GROUP_VER_B)
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#define GROUP_6B (GROUP_TYPE_6 | GROUP_VER_B)
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#define GROUP_7B (GROUP_TYPE_7 | GROUP_VER_B)
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#define GROUP_8B (GROUP_TYPE_8 | GROUP_VER_B)
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#define GROUP_9B (GROUP_TYPE_9 | GROUP_VER_B)
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#define GROUP_10B (GROUP_TYPE_10 | GROUP_VER_B)
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#define GROUP_11B (GROUP_TYPE_11 | GROUP_VER_B)
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#define GROUP_12B (GROUP_TYPE_12 | GROUP_VER_B)
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#define GROUP_13B (GROUP_TYPE_13 | GROUP_VER_B)
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#define GROUP_14B (GROUP_TYPE_14 | GROUP_VER_B)
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#define GROUP_15B (GROUP_TYPE_15 | GROUP_VER_B)
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#define GET_GROUP_TYPE(x) ((x >> 4) & 15)
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#define GET_GROUP_VER(x) (x & 1) /* only check bit 0 */
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#define DI_STEREO (1 << 0) /* 1 - Stereo */
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#define DI_AH (1 << 1) /* 2 - Artificial Head */
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#define DI_COMPRESSED (1 << 2) /* 4 - Compressed */
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#define DI_DPTY (1 << 3) /* 8 - Dynamic PTY */
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/* Bit mask */
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/* 8 bit */
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#define INT8_ALL 0xff
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/* Lower */
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#define INT8_L1 0x01
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#define INT8_L2 0x03
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#define INT8_L3 0x07
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#define INT8_L4 0x0f
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#define INT8_L5 0x1f
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#define INT8_L6 0x3f
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#define INT8_L7 0x7f
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/* Upper */
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#define INT8_U7 0xfe
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#define INT8_U6 0xfc
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#define INT8_U5 0xf8
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#define INT8_U4 0xf0
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#define INT8_U3 0xe0
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#define INT8_U2 0xc0
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#define INT8_U1 0x80
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/* Single */
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#define INT8_0 0x01
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#define INT8_1 0x02
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#define INT8_2 0x04
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#define INT8_3 0x08
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#define INT8_4 0x10
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#define INT8_5 0x20
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#define INT8_6 0x40
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#define INT8_7 0x80
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/* 16 bit */
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#define INT16_ALL 0xffff
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/* Lower */
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#define INT16_L1 0x0001
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#define INT16_L2 0x0003
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#define INT16_L3 0x0007
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#define INT16_L4 0x000f
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#define INT16_L5 0x001f
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#define INT16_L6 0x003f
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#define INT16_L7 0x007f
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#define INT16_L8 0x00ff
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#define INT16_L9 0x01ff
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#define INT16_L10 0x03ff
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#define INT16_L11 0x07ff
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#define INT16_L12 0x0fff
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#define INT16_L13 0x1fff
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#define INT16_L14 0x3fff
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#define INT16_L15 0x7fff
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/* Upper */
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#define INT16_U15 0xfffe
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#define INT16_U14 0xfffc
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#define INT16_U13 0xfff8
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#define INT16_U12 0xfff0
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#define INT16_U11 0xffe0
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#define INT16_U10 0xffc0
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#define INT16_U9 0xff80
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#define INT16_U8 0xff00
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#define INT16_U7 0xfe00
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#define INT16_U6 0xfc00
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#define INT16_U5 0xf800
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#define INT16_U4 0xf000
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#define INT16_U3 0xe000
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#define INT16_U2 0xc000
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#define INT16_U1 0x8000
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/* Single */
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#define INT16_0 0x0001
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#define INT16_1 0x0002
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#define INT16_2 0x0004
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#define INT16_3 0x0008
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#define INT16_4 0x0010
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#define INT16_5 0x0020
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#define INT16_6 0x0040
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#define INT16_7 0x0080
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#define INT16_8 0x0100
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#define INT16_9 0x0200
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#define INT16_10 0x0400
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#define INT16_11 0x0800
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#define INT16_12 0x1000
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#define INT16_13 0x2000
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#define INT16_14 0x4000
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#define INT16_15 0x8000
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/* 18 bit (for RDS2) */
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#define INT18_U2 0x30000
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#define INT18_L4 0x0000f
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#define IS_TYPE_B(a) (a[1] & INT16_11)
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#ifdef RDS2
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#define IS_TUNNELING(a) (a[0] == 0x0000)
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#endif
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#ifdef ODA
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/*
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* RDS ODA ID group
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*
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* This struct is for defining ODAs that will be transmitted
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*
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* Can signal version A or B data groups
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*/
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typedef struct rds_oda_t {
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uint8_t group;
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uint16_t aid;
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uint16_t scb;
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} rds_oda_t;
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#define MAX_ODAS 8
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/*
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* ODA AID
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*
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* Extensive list: https://www.nrscstandards.org/committees/dsm/archive/rds-oda-aids.pdf
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*/
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#define ODA_AID_RTPLUS 0x4bd7
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#endif
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/* RDS2 */
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#define ODA_AID_RFT 0xff7f
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#define ODA_AID_RFTPLUS 0xff80
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extern void init_rds_encoder(struct rds_params_t rds_params);
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extern void exit_rds_encoder();
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extern void get_rds_bits(uint8_t *bits);
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extern void set_rds_pi(uint16_t pi_code);
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extern void set_rds_ecc(uint8_t ecc);
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extern void set_rds_lic(uint8_t lic);
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extern void set_rds_ecclic_toggle(uint8_t toggle);
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extern void set_rds_pin_enabled(uint8_t enabled);
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extern void set_rds_pin(uint8_t day, uint8_t hour, uint8_t minute);
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extern void set_rds_rt1_enabled(uint8_t rt1en);
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extern void set_rds_rt1(unsigned char *rt1);
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extern void set_rds_ps(unsigned char *ps);
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extern void set_rds_tpson(uint8_t tpson);
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extern void set_rds_tps(unsigned char *ps);
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extern void set_rds_lpson(uint8_t lpson);
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extern void set_rds_lps(unsigned char *lps);
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#ifdef ODA_RTP
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extern void set_rds_rtplus_flags(uint8_t flags);
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extern void set_rds_rtplus_tags(uint8_t *tags);
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#endif
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extern void set_rds_ta(uint8_t ta);
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extern void set_rds_pty(uint8_t pty);
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extern void set_rds_ptyn_enabled(uint8_t enabled);
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extern void set_rds_ptyn(unsigned char *ptyn);
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extern void set_rds_af(struct rds_af_t new_af_list);
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extern void clear_rds_af();
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extern void set_rds_tp(uint8_t tp);
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extern void set_rds_ms(uint8_t ms);
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extern void set_rds_ct(uint8_t ct);
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extern void set_rds_di(uint8_t di);
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#ifdef RDS2
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extern float get_rds_sample(uint8_t stream_num, uint8_t rds2tunneling);
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#else
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extern float get_rds_sample(uint8_t stream_num);
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#endif
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extern uint16_t get_rds_pi();
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extern void set_rds_cg(uint16_t* blocks);
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#endif /* RDS_H */
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