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#include <vdr/remote.h>
#include <vdr/status.h>
#include <vdr/plugin.h>
#include "radioaudio.h"
#include "radioskin.h"
#include "radiotools.h"
#include "service.h"
#include <math.h>
extern bool RdsLogo;
extern cRadioAudio *RadioAudio;
// --- cRDSReceiver ------------------------------------------------------------
cRDSReceiver::cRDSReceiver(int Pid) {
dsyslog("radio: additional RDS-Receiver starts on Pid=%d", Pid);
pid = Pid;
rt_start = rt_bstuff = false;
}
cRDSReceiver::~cRDSReceiver() {
dsyslog("radio: additional RDS-Receiver stopped");
}
#if VDRVERSNUM >= 20300
void cRDSReceiver::Receive(const uchar *Data, int Length)
#else
void cRDSReceiver::Receive(uchar *Data, int Length)
#endif
{
const int mframel = 263; // max. 255(MSG)+4(ADD/SQC/MFL)+2(CRC)+2(Start/Stop) of RDS-data
static unsigned char mtext[mframel + 1];
static int index;
static int mec = 0;
// check TS-Size, -Sync, PID, Payload
if (Length != TS_SIZE || Data[0] != 0x47
|| pid != ((Data[1] & 0x1f) << 8) + Data[2] || !(Data[3] & 0x10)) {
return;
}
int offset;
if (Data[1] & 0x40) { // 1.TS-Frame, payload-unit-start
offset = (Data[3] & 0x20) ? Data[4] + 11 : 10; // Header + ADFL + 6 byte: PES-Startcode, -StreamID, -PacketLength
if (Data[offset - 3] == 0xbd) { // StreamID = Private stream 1 (for rds)
offset += 3; // 3 byte: Extension + Headerlength
offset += Data[offset - 1];
} else {
return;
}
} else {
offset = (Data[3] & 0x20) ? Data[4] + 5 : 4; // Header + ADFL
}
if ((TS_SIZE - offset) <= 0) {
return;
}
// print TS-RawData with RDS
if ((S_Verbose & 0x02) == 0x02) {
printf("\n\nTS-Data(%d):\n", Length);
int cnt = 0;
for (int a = 0; a < Length; a++) {
printf("%02x ", Data[a]);
cnt++;
if (cnt > 15) {
cnt = 0;
printf("\n");
}
}
printf("(End)\n");
}
for (int i = 0, val = 0; i < (TS_SIZE - offset); i++) {
val = Data[offset + i];
if (val == 0xfe) { // Start
index = -1;
rt_start = true;
rt_bstuff = false;
mec = 0;
if ((S_Verbose & 0x0f) >= 2) {
printf("\nRDS-Start: ");
}
}
if (rt_start) {
if ((S_Verbose & 0x0f) >= 2) {
printf("%02x ", val);
}
// byte-stuffing reverse: 0xfd00->0xfd, 0xfd01->0xfe, 0xfd02->0xff
if (rt_bstuff) {
switch (val) {
case 0x00:
mtext[index] = 0xfd;
break;
case 0x01:
mtext[index] = 0xfe;
break;
case 0x02:
mtext[index] = 0xff;
break;
default:
mtext[++index] = val; // should never be
}
rt_bstuff = false;
if ((S_Verbose & 0x0f) >= 2) {
printf("(Bytestuffing -> %02x) ", mtext[index]);
}
} else {
mtext[++index] = val;
}
if (val == 0xfd && index > 0) { // stuffing found
rt_bstuff = true;
}
// early check for used MEC
if (index == 5) {
//mec = val;
switch (val) {
case 0x0a: // RT
case 0x46: // ODA-Data
case 0x07: // PTY
case 0x3e: // PTYN
case 0x30: // TMC
case 0x02:
mec = val; // PS
RdsLogo = true;
break;
default:
rt_start = false;
if ((S_Verbose & 0x0f) >= 2) {
printf("[RDS-MEC '%02x' not used -> End]\n", val);
}
}
}
if (index >= mframel) { // max. rdslength, garbage ?
rt_start = false;
if ((S_Verbose & 0x0f) >= 2) {
printf("(RDS-Error: too long, garbage ?)\n");
}
}
}
if (rt_start && val == 0xff) { // End
rt_start = false;
if ((S_Verbose & 0x0f) >= 2) {
printf("(RDS-End)\n");
}
if (index < 9) { // min. rdslength, garbage ?
if ((S_Verbose & 0x0f) >= 1) {
printf("RDS-Error: too short -> garbage ?\n");
}
} else {
// crc16-check
unsigned short crc16 = crc16_ccitt(mtext, index - 3, true);
if (crc16 != (mtext[index - 2] << 8) + mtext[index - 1]) {
if ((S_Verbose & 0x0f) >= 1) {
printf(
"RDS-Error: wrong CRC # calc = %04x <> transmit = %02x%02x\n",
crc16, mtext[index - 2], mtext[index - 1]);
}
} else {
switch (mec) {
case 0x0a:
RadioAudio->RadiotextDecode(mtext, index); // Radiotext
break;
case 0x46:
switch ((mtext[7] << 8) + mtext[8]) { // ODA-ID
case 0x4bd7:
RadioAudio->RadiotextDecode(mtext, index); // RT+
break;
case 0x0d45:
case 0xcd46:
if ((S_Verbose & 0x20) > 0) {
unsigned char tmc[6]; // TMC Alert-C
int i;
for (i = 9; i <= (index - 3); i++) {
tmc[i - 9] = mtext[i];
}
tmc_parser(tmc, i - 8);
}
break;
default:
if ((S_Verbose & 0x0f) >= 2) {
printf(
"[RDS-ODA AID '%02x%02x' not used -> End]\n",
mtext[7], mtext[8]);
}
}
break;
case 0x07:
RT_PTY = mtext[8]; // PTY
if ((S_Verbose & 0x0f) >= 1) {
printf("RDS-PTY set to '%s'\n",
ptynr2string(RT_PTY));
}
break;
case 0x3e:
RadioAudio->RDS_PsPtynDecode(true, mtext, index); // PTYN
break;
case 0x02:
RadioAudio->RDS_PsPtynDecode(false, mtext, index); // PS
break;
case 0x30:
if ((S_Verbose & 0x20) > 0) { // TMC Alert-C
unsigned char tmc[6];
int i;
for (i = 7; i <= (index - 3); i++) {
tmc[i - 7] = mtext[i];
}
tmc_parser(tmc, i - 6);
}
break;
}
}
}
}
}
}
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