2 * Copyright (C) 2009, 2010 by Nils Faerber <nils.faerber@kernelconcepts.de>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
23 #include "rds_consts.h"
29 static struct rds_info_s rds_info;
30 static struct tm rds_time;
32 static struct _RDS_Private {
33 void (*rds_PI_cb)(unsigned short PI, unsigned char ccode, unsigned char ptype, unsigned char pref, void *user_data);
35 void (*rds_sname_cb)(char *sname, void *user_data);
36 void *rds_sname_cb_data;
37 void (*rds_sinfo_cb)(unsigned char TP, unsigned char TA, unsigned char MS, unsigned char PTY, void *user_data);
38 void *rds_sinfo_cb_data;
39 void (*rds_radiotext_cb)(char *radio_text, void *user_data);
40 void *rds_radiotext_cb_data;
41 void (*rds_date_time_cb)(struct tm *dtime, void *user_data);
42 void *rds_date_time_cb_data;
43 void (*rds_afinfo_cb)(unsigned char cnt, double *AF, void *user_data);
44 void *rds_afinfo_cb_data;
48 memset(&_rds_private, 0, sizeof(struct _RDS_Private));
51 void rds_set_PI_cb(void (*rds_PI_cb)(unsigned short PI, unsigned char ccode, unsigned char ptype, unsigned char pref, void *user_data), void *user_data)
53 _rds_private.rds_PI_cb = rds_PI_cb;
54 _rds_private.rds_PI_cb_data = user_data;
57 void rds_set_sname_cb(void (*rds_sname_cb)(char *sname, void *user_data), void *user_data)
59 _rds_private.rds_sname_cb = rds_sname_cb;
60 _rds_private.rds_sname_cb_data = user_data;
63 void rds_set_sinfo_cb(void (*rds_sinfo_cb)(unsigned char TP, unsigned char TA, unsigned char MS, unsigned char PTY, void *user_data), void *user_data)
65 _rds_private.rds_sinfo_cb = rds_sinfo_cb;
66 _rds_private.rds_sinfo_cb_data = user_data;
69 void rds_set_afinfo_cb(void (*rds_afinfo_cb)(unsigned char cnt, double *AF, void *user_data), void *user_data)
71 _rds_private.rds_afinfo_cb = rds_afinfo_cb;
72 _rds_private.rds_afinfo_cb_data = user_data;
75 void rds_set_radiotext_cb(void (*rds_radiotext_cb)(char *radio_text, void *user_data), void *user_data)
77 _rds_private.rds_radiotext_cb = rds_radiotext_cb;
78 _rds_private.rds_radiotext_cb_data = user_data;
81 void rds_set_date_time_cb(void (*rds_date_time_cb)(struct tm *dtime, void *user_data), void *user_data)
83 _rds_private.rds_date_time_cb = rds_date_time_cb;
84 _rds_private.rds_date_time_cb_data = user_data;
88 int rds_receive_group(int rds_fd, unsigned short *rdsgroup)
90 static unsigned char expected = 0;
92 unsigned char rbuf[3];
96 rb = read(rds_fd, rbuf, 3);
98 exit(0); // just for testing
100 printf("#read err rb=%d\n", rb);
101 block = rbuf[0] | (rbuf[1] << 8);
102 offset = rbuf[2] & 0x07;
104 if (rbuf[2] & 0x80) {
105 if (OutputFlags & RDS_RECEIVE_INDICATOR)
108 // printf("group block=0x%04x offs=0x%02x\n", block, offset);
109 if (offset != expected) {
110 if (OutputFlags & RDS_RECEIVE_INDICATOR)
111 printf("block out of sync - resetting\n");
113 memset(rdsgroup, 0, sizeof(rdsgroup));
115 rdsgroup[offset] = block;
119 if (OutputFlags & RDS_RECEIVE_INDICATOR)
125 if (OutputFlags & RDS_RECEIVE_INDICATOR)
131 enum RDSGroupType { GROUP_0A=0, GROUP_0B, GROUP_1A, GROUP_1B, GROUP_2A, GROUP_2B,
132 GROUP_3A, GROUP_3B, GROUP_4A, GROUP_4B, GROUP_5A, GROUP_5B,
133 GROUP_6A, GROUP_6B, GROUP_7A, GROUP_7B, GROUP_8A, GROUP_8B,
134 GROUP_9A, GROUP_9B, GROUP_10A, GROUP_10B, GROUP_11A, GROUP_11B,
135 GROUP_12A, GROUP_12B, GROUP_13A, GROUP_13B, GROUP_14A, GROUP_14B,
136 GROUP_15A, GROUP_15B, GROUP_UNKNOWN };
138 void rds_decode_group(unsigned short *rdsgroup)
140 static unsigned short ogrp[4];
141 static unsigned char grp_decoded = 0;
142 unsigned char grp_type = (rdsgroup[1] >> 11);
144 static unsigned char otextAB = 0, newtext = 0;
145 unsigned short PI = rdsgroup[0];
146 unsigned char textAB = 0;
147 int local_time_off = 0;
151 /* we want to wait for at least two identical group transmits */
152 if (ogrp[0] != rdsgroup[0] || ogrp[1] != rdsgroup[1] || ogrp[2] != rdsgroup[2] || ogrp[3] != rdsgroup[3]) {
153 ogrp[0] = rdsgroup[0];
154 ogrp[1] = rdsgroup[1];
155 ogrp[2] = rdsgroup[2];
156 ogrp[3] = rdsgroup[3];
157 //printf("grp: 0x%04x 0x%04x 0x%04x 0x%04x\n", rdsgroup[0], rdsgroup[1], rdsgroup[2], rdsgroup[3]);
164 if (rds_info.PI != PI) {
165 /* station change? */
166 memset(&rds_info, 0, sizeof(rds_info));
168 memset(&rds_time, 0, sizeof(rds_time));
169 rds_info.ccode = (PI & 0xf000) >> 12;
170 rds_info.ptype = (PI & 0x0f00) >> 8;
171 rds_info.pref = (PI & 0x00ff);
172 if (rds_info.pref == 0) /* something is wrong here */
174 rds_info.PI = rdsgroup[0];
175 if (_rds_private.rds_PI_cb != NULL)
176 _rds_private.rds_PI_cb(rds_info.PI, rds_info.ccode, rds_info.ptype, rds_info.pref, _rds_private.rds_PI_cb_data);
177 if (OutputFlags & RDS_OUTPUT_RDSINFO)
178 printf("PI=%d ccode=%X ptype=%X '%s' '%s' pref=%d\n", rds_info.PI, rds_info.ccode, rds_info.ptype, ptype_stext[rds_info.ptype], ptype_ltext[rds_info.ptype], rds_info.pref);
182 case GROUP_0A: { /* basic switching and tuning */
183 unsigned char AFc1, AFc2;
186 offs = (rdsgroup[1] & 0x03);
187 rds_info.sname[offs*2] = ((rdsgroup[3] & 0xff00) >> 8);
188 rds_info.sname[(offs*2)+1] = rdsgroup[3] & 0x00ff;
189 if (_rds_private.rds_sname_cb != NULL)
190 _rds_private.rds_sname_cb(rds_info.sname, _rds_private.rds_sname_cb_data);
192 rds_info.TA = (rdsgroup[1] & 0x10) >> 4;
193 rds_info.TP = (rdsgroup[1] & 0x400) >> 10;
194 rds_info.MS = (rdsgroup[1] & 0x08) >> 3;
195 rds_info.PTY = (rdsgroup[1] & 0x3e0) >> 5;
196 if (_rds_private.rds_sinfo_cb != NULL)
197 _rds_private.rds_sinfo_cb(rds_info.TP, rds_info.TA, rds_info.MS, rds_info.PTY, _rds_private.rds_sinfo_cb_data);
199 AFc1 = ((rdsgroup[2] & 0xff00) >> 8);
200 AFc2 = (rdsgroup[2] & 0x00ff);
201 if (AFc1 > 225 && AFc1 < 250) {
202 if (OutputFlags & RDS_OUTPUT_STATION_ID)
203 printf(" %d AFs follow:\n", AFc1-224);
204 } else if (AFc1 > 0 && AFc1 < 205)
205 AF1 = (float)87.5 + ((float)AFc1 * .1);
206 else if (AFc1 == 205)
207 printf(" filler- \n");
208 if (AFc2 > 0 && AFc2 < 205)
209 AF2 = (float)87.5 + ((float)AFc2 * .1);
211 if (OutputFlags & RDS_OUTPUT_STATION_ID)
212 printf("sname = '%s' %s %s %s AF1=%3.2f AF2=%3.2f PTY='%s'\n", rds_info.sname, rds_info.TP ? "TP" : "", rds_info.TA ? "TA" : "", rds_info.MS ? "M" : "S", AF1, AF2, PTY_text[rds_info.PTY]);
216 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
217 printf("group 0B\n");
219 case GROUP_1A: { /* Programme Item Number and slow labelling codes */
220 unsigned char variant, day, hour, minute;
221 unsigned short tmc_id;
223 variant = (rdsgroup[2] & (0x07 << 12)) >> 12;
224 day = (rdsgroup[3] & (0x1f << 11)) >> 11;
225 hour = (rdsgroup[3] & (0x1f << 6)) >> 6;
226 minute = (rdsgroup[3] & 0x3f);
227 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
228 printf("1A var=%d day=%d %d:%d ", variant, day, hour, minute);
230 rds_info.ECC = (rdsgroup[2] & 0xff);
231 printf(" ccode=%d ECC=0x%02x '%s' ", rds_info.ccode, rds_info.ECC, ECC_text[((rds_info.ECC & 0x0f)*16)+(rds_info.ccode-1)]);
234 tmc_id = (rdsgroup[2] & 0x0fff);
235 printf(" TMC ID=0x%04x", tmc_id);
238 printf(" Paging ID=0x%04x", (rdsgroup[2] & 0x0fff));
241 rds_info.lang_code = (rdsgroup[2] & 0xff);
242 printf(" language=0x%02x ", rds_info.lang_code);
243 switch (rds_info.lang_code) {
271 printf(" EWS Channel ID=0x%04x", (rdsgroup[2] & 0x0fff));
276 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
277 printf("group 1B\n");
279 case GROUP_2A: /* 2A has 64 chars, 4 per group */
280 case GROUP_2B: /* 2B has 32 chars, 2 per group */
281 offs = (rdsgroup[1] & 0x0f);
282 textAB = (rdsgroup[1] & 0x10);
283 if (textAB != otextAB) {
284 memset(rds_info.rtext, ' ', 64);
285 rds_info.rtext[64] = '\0';
288 if (grp_type == GROUP_2A) {
289 rds_info.rtext[offs*4] = ((rdsgroup[2] & 0xff00) >> 8);
290 rds_info.rtext[(offs*4)+1] = (rdsgroup[2] & 0x00ff);
291 rds_info.rtext[(offs*4)+2] = ((rdsgroup[3] & 0xff00) >> 8);
292 rds_info.rtext[(offs*4)+3] = (rdsgroup[3] & 0x00ff);
294 rds_info.rtext[offs*2] = ((rdsgroup[3] & 0xff00) >> 8);
295 rds_info.rtext[(offs*2)+1] = (rdsgroup[3] & 0x00ff);
297 if (offs == 0) /* new text always starts at 0 */
299 if ((offs == 15)) { /* all parts received */
301 if (_rds_private.rds_radiotext_cb != NULL)
302 _rds_private.rds_radiotext_cb(rds_info.rtext, _rds_private.rds_radiotext_cb_data);
303 if (OutputFlags & RDS_OUTPUT_RADIO_TEXT)
304 printf("RT '%s'\n", rds_info.rtext);
309 case GROUP_3A: /* ODA - TMC alarm, */
310 rds_info.AID = rdsgroup[3];
312 if (rds_info.AID == 0xcd46 || rds_info.AID == 0x0d45) {
313 if ((rdsgroup[2] & 0xc000) == 0) {
314 rds_info.LTN = (rdsgroup[2] & 0x0fc0) >> 6;
315 rds_info.AFI = (rdsgroup[2] & 0x0020) >> 5;
316 rds_info.M = (rdsgroup[2] & 0x0010) >> 4;
317 rds_info.I = (rdsgroup[2] & 0x0008) >> 3;
318 rds_info.N = (rdsgroup[2] & 0x0004) >> 2;
319 rds_info.R = (rdsgroup[2] & 0x0002) >> 1;
320 rds_info.U = (rdsgroup[2] & 0x0001);
322 if (rdsgroup[2] & 0x4000) {
325 rds_info.G = (rdsgroup[2] & 0x3000) >> 12;
326 rds_info.Ta = (rdsgroup[2] & 0x0030) >> 4;
327 rds_info.Tw = (rdsgroup[2] & 0x000c) >> 2;
328 rds_info.Td = (rdsgroup[2] & 0x0003);
332 if (OutputFlags & RDS_OUTPUT_RDSINFO) {
333 printf("AID = 0x%04x\n", rds_info.AID);
334 printf("LTN ID = %d (0x%02x)\n", rds_info.LTN, rds_info.LTN);
335 printf("Traffic information: ");
337 printf("international ");
346 } else if (rds_info.AID == 0x4bd7) {
347 if (OutputFlags & RDS_OUTPUT_RDSINFO) {
348 printf("RT+\nG2 = 0x%04x\n", rdsgroup[2]);
349 printf("template = 0x%02x\n", (rdsgroup[2] & 0x00ff));
350 printf("SCB = 0x%02x\n", (rdsgroup[2] & 0x0f00)>>8);
351 printf("CB = 0x%02x\n", (rdsgroup[2] & 0x1000)>>12);
352 printf("rfu = 0x%02x\n", (rdsgroup[2] & 0xe000)>>13);
355 printf("3A AID=0x%04x\n", rds_info.AID);
359 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
360 printf("group 3B\n");
363 //printf("group 4A - time/date\n");
364 rds_time.tm_sec = 0; // date/time message is sent at 00 secs +/- .2sec
365 rds_time.tm_min = ((rdsgroup[3] & (0x3f << 6)) >> 6);
366 rds_time.tm_hour = ((rdsgroup[3] & (0x0f << 12)) >> 12) | ((rdsgroup[2] & 0x01) << 4);
367 local_time_off = (rdsgroup[3] & 0x0f) * ((rdsgroup[3] & 0x10) ? -1 : 1);
368 rds_time.tm_hour += local_time_off / 2;
369 rds_time.tm_min = (rds_time.tm_min + ((local_time_off % 2) * 30)) % 60;
371 day_code = (((rdsgroup[2] & 0xfffe) >> 1) | ((rdsgroup[1] & 0x03) << 15)) /*+ local_time_off*/;
373 year_ = ((float)day_code - 15078.2) / 365.25;
374 mon_ = ((day_code - 14956.1) - (int)(year_ * 365.25)) / 30.6001;
375 rds_time.tm_mday = day_code - 14956 - (int)(year_ * 365.25) - (int)(mon_ * 30.6001);
376 if (mon_ == 14 || mon_ == 15)
380 rds_time.tm_year = year_ + K;
381 rds_time.tm_mon = mon_ - 1 - (K * 12) - 1;
383 rds_time.tm_isdst = -1;
385 if (_rds_private.rds_date_time_cb != NULL)
386 _rds_private.rds_date_time_cb(&rds_time, _rds_private.rds_date_time_cb_data);
388 if (OutputFlags & RDS_OUTPUT_DATETIME)
389 printf("%s", asctime(&rds_time));
391 printf("%d:%02d - local time offset = %d, %s (dcode = %d)\n", rds_time.tm_hour, rds_time.tm_min, local_time_off, asctime(&rds_time), day_code);
393 //printf("day=%d month=%d year=%d\n", day, mon, year);
396 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
400 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
404 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
408 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
412 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
416 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
420 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
424 if (rds_info.LTN != 0) // non TMCpro
425 decode_tmc(rdsgroup);
426 if (rds_info.LTN == 0)
430 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
434 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
438 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
442 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
446 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
449 case GROUP_11A: /* Open Data Application ODA */
450 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
451 printf("GRP11A ODA: #1=0x%02x #2=0x%04x #3=0x%04x\n", rdsgroup[1] & 0x1f, rdsgroup[2], rdsgroup[3]);
453 /* we previously got an RT+ identifier, try RT+ decoding */
454 if (rds_info.AID == 0x4bd7) {
455 printf("RT+\ntoggle: %s\n", (rdsgroup[1] & 0x10) ? "yes" : "no");
456 printf("item running : %s\n", (rdsgroup[1] & 0x08) ? "yes" : "no");
457 printf("content type 1 : %d\n", (rdsgroup[1] & 0x07) << 3 | (rdsgroup[2] & 0x0e00) >> 13);
458 printf("start marker 1 : %d\n", (rdsgroup[2] & 0x1f80) >> 7);
459 printf("length marker 1: %d\n", (rdsgroup[2] & 0x007e) >> 1);
460 printf("content type 2 : %d\n", (rdsgroup[1] & 0x01) << 4);
461 printf("start marker 2 : %d\n", (rdsgroup[2] & 0x07e0) >> 5);
462 printf("length marker 2: %d\n", (rdsgroup[2] & 0x001f));
465 case GROUP_11B: /* Open Data Application ODA */
466 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
468 printf("11B ODA: #1=0x%02x PI=0x%04x #3=0x%04x\n", rdsgroup[1] & 0x1f, rdsgroup[2], rdsgroup[3]);
470 case GROUP_12A: /* Open Data Application ODA */
471 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
474 case GROUP_12B: /* Open Data Application ODA */
475 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
478 case GROUP_13A: /* Open Data Application ODA or paging */
479 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
482 case GROUP_13B: /* Open Data Application ODA */
483 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
486 case GROUP_14A: /* EON */ {
487 unsigned char variant = rdsgroup[1] & 0x0f;
488 unsigned char AFc1=0, AFc2=0;
492 rds_info.PTY = (rdsgroup[1] & 0x3e0) >> 5;
493 rds_info.TPTN = (rdsgroup[1] & 0x400) >> 10;
494 rds_info.TPON = (rdsgroup[1] & 0x10) >> 4;
497 if (variant <= 3) { // PS
498 rds_info.PS[variant*2] = ((rdsgroup[2] & 0xff00) >> 8);
499 rds_info.PS[(variant*2)+1] = (rdsgroup[2] & 0x00ff);
500 } else if (variant == 4) {
501 printf("EON variant 4\n");
502 } else if (variant >= 5 && variant <= 8) { // AF - alternate frequency
503 AFc1 = ((rdsgroup[2] & 0xff00) >> 8);
504 AFc2 = (rdsgroup[2] & 0x00ff);
505 if (AFc1 > 0 && AFc1 < 205)
506 AF1 = (float)87.5 + ((float)AFc1 * .1);
507 else if (AFc1 >= 225 && AFc1 <= 249)
509 if (AFc2 > 0 && AFc2 < 205)
510 AF2 = (float)87.5 + ((float)AFc2 * .1);
511 else if (AFc2 >= 225 && AFc2 <= 249)
514 if (OutputFlags & RDS_OUTPUT_EON) {
515 printf("EON var=0x%01x PTY=%d ('%s') PS='%s' AF1=%3.2f (%d) AF2=%3.2f (%d) PI=%d\n", variant, rds_info.PTY, PTY_text[rds_info.PTY], rds_info.PS, AF1, AFc1, AF2, AFc2, PI);
518 case GROUP_14B: /* Enhanced Other Networks information */
519 if (OutputFlags & RDS_OUTPUT_EON)
520 printf("GRP14B: Enhanced Other Networks information\n");
523 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
526 case GROUP_15B: /* Fast basic tuning and switching information */
527 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
528 printf("GRP15B: Fast basic tuning and switching information\n");
531 if (OutputFlags & RDS_OUTPUT_UNKNGRP)
532 printf("unkn. RDS group %d\n", grp_type);
536 /* done with this group */