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Fixed / improved fragmenter.

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Thulinma 2013-04-13 13:45:42 +02:00
parent 71b918b7aa
commit 61246062fb
1 changed files with 33 additions and 11 deletions
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44
lib/dtsc.cpp
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@ -342,32 +342,54 @@ void DTSC::Stream::updateHeaders(){
metadata["keytime"].append(buffers[keyframes[1].b]["time"].asInt());
metadata["keynum"].append(buffers[keyframes[1].b]["fragnum"].asInt());
metadata["keylen"].append(buffers[keyframes[0].b]["time"].asInt() - buffers[keyframes[1].b]["time"].asInt());
long long int firstFragNo = -1;
metadata["frags"].null();
long long int currFrag = -1;
for (unsigned int i = 1; i < metadata["keytime"].size(); i++){
if (metadata["keytime"][i].asInt() / 10000 > currFrag){
currFrag = metadata["keytime"][i].asInt() / 10000;
unsigned int fragStart = 0;
if ( !metadata["frags"]){
// this means that if we have < ~10 seconds in the buffer, fragmenting goes horribly wrong.
if ( !metadata.isMember("missed_frags")){
metadata["missed_frags"] = 0ll;
}
}else{
// delete fragments of which the beginning can no longer be reached
while (metadata["frags"][0u]["num"].asInt() < metadata["keynum"][0u].asInt()){
metadata["frags"].shrink(metadata["frags"].size() - 1);
// increase the missed fragments counter
metadata["missed_frags"] = metadata["missed_frags"].asInt() + 1;
}
if (metadata["frags"].size() > 0){
// set oldestFrag to the first keynum outside any current fragment
long long unsigned int oldestFrag = metadata["frags"][metadata["frags"].size() - 1]["num"].asInt() + metadata["frags"][metadata["frags"].size() - 1]["len"].asInt();
// seek fragStart to the first keynum >= oldestFrag
while (metadata["keynum"][fragStart].asInt() < oldestFrag){
fragStart++;
}
}
}
for (unsigned int i = fragStart; i < metadata["keytime"].size(); i++){
if (i == fragStart){
long long int currFrag = metadata["keytime"][i].asInt() / 10000;
long long int fragLen = 1;
long long int fragDur = metadata["keylen"][i].asInt();
for (unsigned int j = i + 1; j < metadata["keytime"].size(); j++){
if (metadata["keytime"][j].asInt() / 10000 > currFrag){
if (firstFragNo == -1){
firstFragNo = currFrag;
}
// if we are now 10+ seconds, finish the fragment
if (fragDur >= 10000){
// construct and append the fragment
JSON::Value thisFrag;
thisFrag["num"] = metadata["keynum"][i];
thisFrag["len"] = fragLen;
thisFrag["dur"] = fragDur;
metadata["frags"].append(thisFrag);
// next fragment starts fragLen fragments up
fragStart += fragLen;
// skip that many - no unneeded looping
i += fragLen - 1;
break;
}
// otherwise, +1 the length and add up the duration
fragLen++;
fragDur += metadata["keylen"][j].asInt();
}
}
}
metadata["missed_frags"] = firstFragNo;
metadata["lastms"] = buffers[keyframes[0].b]["time"].asInt();
metadata["buffer_window"] = (long long int)buffertime;
metadata["live"] = true;