// Break received audio data into manageable chunks, forward them to decoder
void FaxTerminal::rxData(const DataBlock& data, unsigned long tStamp)
{
unsigned int pos = 0;
while (pos < data.length())
{
// feed the decoder with small chunks of data (16 bytes/ms)
int len = data.length() - pos;
if (len > FAX_DATA_CHUNK)
len = FAX_DATA_CHUNK;
rxBlock(((char *)data.data())+pos, len);
pos += len;
}
}
// Convert endiannes
bool RadioDataFile::fixEndian(DataBlock& buf, unsigned int bytes)
{
if (!bytes)
return false;
unsigned int n = buf.length() / bytes;
if (bytes == 2) {
for (uint16_t* p = (uint16_t*)buf.data(); n; n--, p++)
#ifdef LITTLE_ENDIAN
*p = be16toh(*p);
#else
*p = le16toh(*p);
#endif
return true;
}
if (bytes == 4) {
for (uint32_t* p = (uint32_t*)buf.data(); n; n--, p++)
#ifdef LITTLE_ENDIAN
*p = be32toh(*p);
#else
*p = le32toh(*p);
#endif
return true;
}
if (bytes == 8) {
for (uint64_t* p = (uint64_t*)buf.data(); n; n--, p++)
#ifdef LITTLE_ENDIAN
*p = be64toh(*p);
#else
*p = le64toh(*p);
#endif
return true;
}
return false;
}
virtual unsigned long Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags)
{
if (!ref())
return 0;
unsigned long len = 0;
if (m_valid && getTransSource() && m_buffer.convert(data,m_sFmt,m_dFmt)) {
if (tStamp == invalidStamp()) {
unsigned int delta = data.length();
if (delta > m_buffer.length())
delta = m_buffer.length();
tStamp = m_timestamp + delta;
}
m_timestamp = tStamp;
len = getTransSource()->Forward(m_buffer,tStamp,flags);
}
deref();
return len;
}
// Feed samples to the filter(s)
unsigned long ToneConsumer::Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags)
{
unsigned int samp = data.length() / 2;
if (m_mode != Mono)
samp /= 2;
if (!samp)
return 0;
const int16_t* s = (const int16_t*)data.data();
if (!s)
return 0;
while (samp--) {
m_xv[0] = m_xv[1]; m_xv[1] = m_xv[2];
switch (m_mode) {
case Left:
// use 1st sample, skip 2nd
m_xv[2] = *s++;
s++;
break;
case Right:
// skip 1st sample, use 2nd
s++;
m_xv[2] = *s++;
break;
case Mixed:
// add together samples
m_xv[2] = s[0]+(int)s[1];
s+=2;
break;
default:
m_xv[2] = *s++;
}
double dx = m_xv[2] - m_xv[0];
updatePwr(m_pwr,m_xv[2]);
// update all active detectors
if (m_detFax)
m_fax.update(dx);
if (m_detCont)
m_cont.update(dx);
if (m_detDtmf || m_detDnis) {
for (int j = 0; j < 4; j++) {
m_dtmfL[j].update(dx);
m_dtmfH[j].update(dx);
}
}
// only do checks every millisecond
if (samp % 8)
continue;
// is it enough total power to accept a signal?
if (m_pwr >= THRESHOLD2_ABS) {
if (m_detDtmf || m_detDnis)
checkDtmf();
if (m_detFax)
checkFax();
if (m_detCont)
checkCont();
}
else {
m_dtmfTone = '\0';
m_dtmfCount = 0;
}
}
XDebug(&plugin,DebugAll,"Fax detector on %s: signal=%0.1f, total=%0.1f",
m_id.c_str(),m_fax.value(),m_pwr);
return invalidStamp();
}
// Create a buffer containing the byte representation of a message to be sent
// and another one with the header
bool ETSIModem::createMsg(NamedList& params, DataBlock& data)
{
int type = lookup(params,s_msg);
switch (type) {
case MsgCallSetup:
break;
case MsgMWI:
case MsgCharge:
case MsgSMS:
Debug(this,DebugStub,"Create message '%s' not implemented [%p]",
params.c_str(),this);
return false;
default:
Debug(this,DebugNote,"Can't create unknown message '%s' [%p]",
params.c_str(),this);
return false;
}
ObjList msg;
bool fail = !params.getBoolValue("force-send",true);
// DateTime - ETSI EN 300 659-3 - 5.4.1
String datetime = params.getValue("datetime");
unsigned char dt[4];
bool ok = false;
if (datetime.isBoolean())
if (datetime.toBoolean())
ok = getDateTime(dt);
else ;
else
ok = getDateTime(dt,&datetime);
if (ok) {
DataBlock* dtParam = new DataBlock(0,10);
unsigned char* d = (unsigned char*)dtParam->data();
d[0] = DateTime;
d[1] = 8;
// Set date and time: %.2d%.2d%.2d%.2d month:day:hour:minute
for (int i = 0, j = 2; i < 4; i++, j += 2) {
d[j] = '0' + dt[i] / 10;
d[j+1] = '0' + dt[i] % 10;
}
msg.append(dtParam);
}
else
DDebug(this,DebugInfo,"Can't set datetime parameter from '%s' [%p]",
datetime.c_str(),this);
// CallerId/CallerIdReason - ETSI EN 300 659-3 - 5.4.2: Max caller id 20
// Parameter is missing: append reason (default caller absence: 0x4f: unavailable)
int res = appendParam(msg,params,CallerId,20,fail);
if (res == -1)
return false;
if (!res)
appendParam(msg,params,CallerIdReason,s_dict_callerAbsence,0x4f);
// CallerName/CallerNameReason - ETSI EN 300 659-3 - 5.4.5: Max caller name 50
// Parameter is missing: append reason (default callername absence: 0x4f: unavailable)
res = appendParam(msg,params,CallerName,50,fail);
if (res == -1)
return false;
if (!res)
appendParam(msg,params,CallerNameReason,s_dict_callerAbsence,0x4f);
// Build message
unsigned char len = 0;
unsigned char hdr[2] = {type};
data.assign(&hdr,sizeof(hdr));
for (ObjList* o = msg.skipNull(); o; o = o->skipNext()) {
DataBlock* msgParam = static_cast<DataBlock*>(o->get());
if (len + msgParam->length() > 255) {
if (!fail) {
Debug(this,DebugNote,"Trucating %s message length to %u bytes [%p]",
params.c_str(),data.length(),this);
break;
}
params.setParam("error","message-too-long");
return false;
}
len += msgParam->length();
data += *msgParam;
}
if (!len) {
params.setParam("error","empty-message");
return false;
}
unsigned char* buf = ((unsigned char*)(data.data()));
buf[1] = len;
m_chksum = 0;
for (unsigned int i = 0; i < data.length(); i++)
m_chksum += buf[i];
unsigned char crcVal = 256 - (m_chksum & 0xff);
FSKModem::addRaw(data,&crcVal,1);
return true;
}
// Process (decode) a valid received buffer. Call recvParams() after decoding the message
// Return false to stop processing data
bool ETSIModem::decode(MsgType msg, const DataBlock& buffer)
{
NamedList params("");
DDebug(this,DebugAll,"Decoding message %s [%p]",lookup(msg,s_msg),this);
unsigned char* data = (unsigned char*)buffer.data();
for (unsigned int i = 0; i < buffer.length();) {
unsigned char param = data[i++]; // Param type
const char* pname = lookup(param,s_msgParams);
unsigned int len = data[i++]; // Param length (non 0)
unsigned char* pdata = data + i;
// End of buffer: Force index outside the end of buffer
if (i < buffer.length())
i += data[i-1];
else
i++;
if (i > buffer.length()) {
Debug(this,DebugWarn,"Unexpected end of %s parameter [%p]",pname,this);
return UART::error(UART::EInvalidData);
}
String tmp;
#define CHECK_LEN(expected) \
if (len != expected) { \
Debug(this,DebugNote,"Invalid len=%u (expected %u) for %s parameter [%p]",len,expected,pname,this); \
continue; \
}
#define SET_PARAM_FROM_DATA(paramname) \
tmp.assign((char*)pdata,len); \
params.addParam(paramname,tmp);
#define SET_PARAM_FROM_DICT(paramname,dict) \
tmp = lookup(*pdata,dict,"unknown"); \
params.addParam(paramname,tmp);
// Process parameters
// References are the sections from ETSI EN 300 659-3
switch (param) {
case CallerId: // 5.4.2
SET_PARAM_FROM_DATA("caller")
break;
case CallerName: // 5.4.5
SET_PARAM_FROM_DATA("callername")
break;
case CallerIdReason: // 5.4.4
CHECK_LEN(1)
SET_PARAM_FROM_DICT("callerpres",s_dict_callerAbsence)
break;
case CallerNameReason: // 5.4.6
CHECK_LEN(1)
SET_PARAM_FROM_DICT("callernamepres",s_dict_callerAbsence)
break;
case DateTime: // 5.4.1
CHECK_LEN(8)
setDateTime(tmp,(char*)pdata,8);
params.addParam("datetime",tmp);
break;
case CompDateTime: // 5.4.10
if (param == CompDateTime && len != 8 && len != 10) {
Debug(this,DebugNote,
"Invalid len=%u (expected 8 or 10) for %s parameter [%p]",len,pname,this);
continue;
}
setDateTime(tmp,(char*)pdata,len);
params.addParam("service_datetime",tmp);
break;
case CalledId: // 5.4.3
SET_PARAM_FROM_DATA("called")
break;
case CallType: // 5.4.12
CHECK_LEN(1)
SET_PARAM_FROM_DICT("calltype",s_dict_callType)
break;
case CallerType: // 5.4.16
CHECK_LEN(1)
SET_PARAM_FROM_DICT("originator_type",s_dict_callerType)
break;
case VisualIndicator: // 5.4.7
CHECK_LEN(1)
if (*pdata == 0 || *pdata == 255)
tmp = String::boolText(*pdata != 0);
else
tmp = (int)(*pdata);
params.addParam("visualindicator",tmp);
break;
case MessageId: // 5.4.8
CHECK_LEN(3)
SET_PARAM_FROM_DICT("message_status",s_dict_mwiStatus)
params.addParam("message_ref",String(net2short(pdata + 1)));
DDebug(this,DebugInfo,
"Decoded %s parameter (status=%s ref=%d) [%p]",
pname,tmp.c_str(),net2short(pdata + 1),this);
continue;
case LastMsgCLI: // 5.4.9
SET_PARAM_FROM_DATA("message_caller")
break;
case CompCallerId: // 5.4.11
SET_PARAM_FROM_DATA("caller_networkprovided")
break;
case FirstCalledId: // 5.4.13
SET_PARAM_FROM_DATA("ffwd_first")
break;
case MWICount: // 5.4.14
CHECK_LEN(1)
tmp = (int)(*pdata);
params.addParam("message_count",tmp);
break;
case FwdCallType: // 5.4.15
CHECK_LEN(1)
SET_PARAM_FROM_DICT("ffwd_reason",s_dict_ffwdReason)
break;
case RedirNumber: // 5.4.17
SET_PARAM_FROM_DATA("ffwd_last")
break;
case Charge: // 5.4.18
Debug(this,DebugStub,"Skipping %s parameter [%p]",pname,this);
continue;
case AdditionalCharge: // 5.4.19
Debug(this,DebugStub,"Skipping %s parameter [%p]",pname,this);
continue;
case Duration: // 5.4.20
CHECK_LEN(6)
setDateTime(tmp,(char*)pdata,6);
params.addParam("duration",tmp);
break;
case NetworkID: // 5.4.21
SET_PARAM_FROM_DATA("netid")
break;
case CarrierId: // 5.4.22
SET_PARAM_FROM_DATA("carrierid")
break;
case SelectFunction: // 5.4.23
Debug(this,DebugStub,"Skipping %s parameter [%p]",pname,this);
continue;
case Display: // 5.4.24
Debug(this,DebugStub,"Skipping %s parameter [%p]",pname,this);
continue;
case ServiceInfo: // 5.4.25
CHECK_LEN(1)
if (*pdata > 1)
tmp = (int)(*pdata);
else
tmp = *pdata ? "active" : "not-active";
params.addParam("service_info",tmp);
break;
case Extension: // 5.4.26
Debug(this,DebugStub,"Skipping %s parameter [%p]",pname,this);
continue;
}
#undef SET_PARAM_FROM_DATA
#undef SET_PARAM_FROM_DICT
#undef CHECK_LEN
DDebug(this,DebugAll,"Decoded %s=%s [%p]",pname,tmp.c_str(),this);
}
if (recvParams(msg,params))
return true;
return UART::error(EStopped);
}
// Handle received digital data
void T38Terminal::rxData(const DataBlock& data, unsigned long tStamp)
{
t38_core_rx_ifp_packet(t38_get_t38_state(&m_t38),(uint8_t*)data.data(),data.length(),tStamp & 0xffff);
}
