void CCAcc::invoke(const string& method, const AmArg& args, AmArg& ret)
{
if(method == "getCredit"){
assertArgCStr(args.get(0));
ret.push(getCredit(args.get(0).asCStr()));
} else if(method == "subtractCredit"){
assertArgCStr(args.get(0));
assertArgInt(args.get(1));
ret.push(subtractCredit(args.get(0).asCStr(),
args.get(1).asInt()));
} else if(method == "addCredit"){
assertArgCStr(args.get(0));
assertArgInt(args.get(1));
ret.push(addCredit(args.get(0).asCStr(),
args.get(1).asInt()));
} else if(method == "setCredit"){
assertArgCStr(args.get(0));
assertArgInt(args.get(1));
ret.push(setCredit(args.get(0).asCStr(),
args.get(1).asInt()));
} else if(method == "_list"){
ret.push("getCredit");
ret.push("subtractCredit");
ret.push("setCredit");
ret.push("addCredit");
}
else
throw AmDynInvoke::NotImplemented(method);
}
/*
* RTP packet transmitted
*/
gfloat ScreamTx::addTransmitted(guint64 time_us,
guint32 ssrc,
gint size,
guint16 seqNr) {
if (!isInitialized)
initialize(time_us);
int k = 0;
int ix = -1;
while (k < kMaxTxPackets) {
if (txPackets[k].isUsed == FALSE) {
ix = k;
break;
}
k++;
}
if (ix == -1) {
/*
* If you end up here then it is necessary to increase
* kMaxTxPackets
*/
ix = 0;
cerr << "Max number of txPackets allocated" << endl;
}
txPackets[ix].timestamp = (guint32) (time_us/1000);
txPackets[ix].timeTx_us = time_us;
txPackets[ix].ssrc = ssrc;
txPackets[ix].size = size;
txPackets[ix].seqNr = seqNr;
txPackets[ix].isUsed = TRUE;
Stream* stream = getStream(ssrc);
stream->bytesTransmitted += size;
lastTransmitT_us = time_us;
/*
* Add credit to unserved streams
*/
addCredit(time_us, stream, size);
/*
* Reduce used credit for served stream
*/
subtractCredit(time_us, stream, size);
/*
* compute paceInterval, we assume a min bw of 50kbps and a min tp of 1ms
* for stable operation
* this function implements the packet pacing
*/
gfloat paceInterval = kMinPaceInterval;
pacingBitrate = MAX(kMinimumBandwidth,cwnd * 8.0f / MAX(0.001f,getSRtt()));
gfloat tp = (size * 8.0f) / pacingBitrate;
if (owdFractionAvg > 0.1f && kEnablePacketPacing) {
paceInterval = MAX(kMinPaceInterval,tp);
}
if (kBypassTxSheduling) {
paceInterval = 0.0;
}
guint64 paceInterval_us = (guint64) (paceInterval*1000000);
/*
* Update MSS and cwndMin
*/
mss = MAX(mss, size);
cwndMin = 2 * mss;
/*
* Determine when next RTP packet can be transmitted
*/
nextTransmitT_us = time_us + paceInterval_us;
return paceInterval;
}