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CMAF debug session 2021-02-04

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Thulinma 2021-02-05 00:12:26 +01:00
parent 4a3204cb1e
commit 5a40225046
5 changed files with 36 additions and 32 deletions
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1
lib/defines.h
View file

@ -170,6 +170,7 @@ static inline void show_stackframe(){}
#define DEFAULT_FRAGMENT_DURATION 1900
/// \TODO These values are hardcoded and that is dangerous and probably a very bad idea. I don't even know if they are currently correct...?! I doubt they are.
#define META_META_OFFSET 104
#define META_META_RECORDSIZE 576

4
lib/dtsc.cpp
View file

@ -1723,12 +1723,12 @@ namespace DTSC{
t.track.addField("channels", RAX_16UINT);
t.track.addField("width", RAX_32UINT);
t.track.addField("height", RAX_32UINT);
t.track.addField("fpks", RAX_16UINT);
t.track.addField("missedFrags", RAX_32UINT);
t.track.addField("parts", RAX_NESTED, TRACK_PART_OFFSET + (TRACK_PART_RECORDSIZE * partCount));
t.track.addField("keys", RAX_NESTED, TRACK_KEY_OFFSET + (TRACK_KEY_RECORDSIZE * keyCount));
t.track.addField("fragments", RAX_NESTED, TRACK_FRAGMENT_OFFSET + (TRACK_FRAGMENT_RECORDSIZE * fragCount));
t.track.addField("pages", RAX_NESTED, TRACK_PAGE_OFFSET + (TRACK_PAGE_RECORDSIZE * pageCount));
t.track.addField("fpks", RAX_16UINT);
t.track.addField("missedFrags", RAX_32UINT);
t.track.setRCount(1);
t.track.addRecords(1);

9
src/output/output.cpp
View file

@ -737,8 +737,6 @@ namespace Mist{
HIGH_MSG("Seeking to track %zu key %zu => time %" PRIu64, tid, keyNum, pos);
if (actualKeyTime > pos){
if (M.getLive()){
WARN_MSG("Actually seeking to %" PRIu64 ", for %" PRIu64 " is not available any more",
actualKeyTime, pos);
pos = actualKeyTime;
userSelect[tid].setKeyNum(keyNum);
}
@ -784,7 +782,7 @@ namespace Mist{
stats();
}
if (curPage[tid].mapped[tmp.offset]){return seek(tid, pos, getNextKey);}
FAIL_MSG("Track %zu no data (key %zu@%" PRIu64 ") - timeout", tid, keyNum + (getNextKey ? 1 : 0), tmp.offset);
FAIL_MSG("Track %zu no data (key %zu@%" PRIu64 ", page %s, time %" PRIu64 " -> %" PRIu64 ", next=%" PRIu64 ") - timeout", tid, keyNum + (getNextKey ? 1 : 0), tmp.offset, curPage[tid].name.c_str(), pos, actualKeyTime, keys.getTime(keyNum+1));
userSelect.erase(tid);
firstTime = Util::bootMS() - (buffer.begin()->time * realTime / 1000);
return false;
@ -1249,7 +1247,7 @@ namespace Mist{
uint32_t sleepTime = std::min(20ul, needsLookAhead);
// wait at most double the look ahead time, plus ten seconds
uint64_t timeoutTries = (needsLookAhead / sleepTime) * 2 + (10000 / sleepTime);
uint64_t needsTime = thisPacket.getTime() + needsLookAhead;
uint64_t needsTime = thisTime + needsLookAhead;
bool firstTime = true;
while (--timeoutTries && keepGoing()){
bool lookReady = true;
@ -1273,9 +1271,10 @@ namespace Mist{
//Make sure we stay responsive to requests and stats while waiting
if (wantRequest){requestHandler();}
stats();
meta.reloadReplacedPagesIfNeeded();
}
if (!timeoutTries){
WARN_MSG("Waiting for lookahead timed out - resetting lookahead!");
WARN_MSG("Waiting for lookahead (%zums in %zu tracks) timed out - resetting lookahead!", needsLookAhead, userSelect.size());
needsLookAhead = 0;
}
}

46
src/output/output_cmaf.cpp
View file

@ -65,6 +65,7 @@ namespace Mist{
OutCMAF::OutCMAF(Socket::Connection &conn) : HTTPOutput(conn){
uaDelay = 0;
realTime = 0;
if (config->getString("target").size()){
needsLookAhead = 5000;
@ -78,10 +79,7 @@ namespace Mist{
initialize();
initialSeek();
startPushOut();
} else {
realTime = 0;
}
INFO_MSG("Out of constructor now");
}
//Properly end all tracks on shutdown.
@ -802,18 +800,19 @@ namespace Mist{
/// Function that waits at most `maxWait` ms (in steps of 100ms) for the next keyframe to become available.
/// Uses thisIdx and thisPacket to determine track and current timestamp respectively.
bool OutCMAF::waitForNextKey(uint64_t maxWait){
size_t currentKey = M.getKeyIndexForTime(getMainSelectedTrack(), thisPacket.getTime());
DTSC::Keys keys(M.keys(getMainSelectedTrack()));
size_t waitTimes = maxWait / 100;
for (size_t i = 0; i < waitTimes; ++i){
if (keys.getEndValid() > currentKey + 1 && M.getLastms(thisIdx) > M.getTimeForKeyIndex(getMainSelectedTrack(), currentKey+1)){
uint64_t mTrk = getMainSelectedTrack();
size_t currentKey = M.getKeyIndexForTime(mTrk, thisTime);
uint64_t startTime = Util::bootMS();
DTSC::Keys keys(M.keys(mTrk));
while (startTime + maxWait > Util::bootMS() && keepGoing()){
if (keys.getEndValid() > currentKey + 1 && M.getLastms(thisIdx) >= M.getTimeForKeyIndex(mTrk, currentKey+1)){
return true;
}
Util::wait(100);
//Make sure we don't accidentally timeout while waiting - runs approximately every second.
if (i % 10 == 0){stats();}
Util::sleep(20);
meta.reloadReplacedPagesIfNeeded();
}
return (keys.getEndValid() > currentKey + 1 && M.getLastms(thisIdx) > M.getTimeForKeyIndex(getMainSelectedTrack(), currentKey+1));
INFO_MSG("Timed out waiting for next key (track %" PRIu64 ", %zu+1, last is %zu, time is %" PRIu64 ")", mTrk, currentKey, keys.getEndValid()-1, M.getTimeForKeyIndex(getMainSelectedTrack(), currentKey+1));
return (keys.getEndValid() > currentKey + 1 && M.getLastms(thisIdx) >= M.getTimeForKeyIndex(mTrk, currentKey+1));
}
//Set up an empty connection to the target to make sure we can push data towards it.
@ -827,14 +826,15 @@ namespace Mist{
//CMAF Push output uses keyframe boundaries instead of fragment boundaries, to allow for lower latency
void OutCMAF::pushNext() {
size_t mTrk = getMainSelectedTrack();
//Set up a new connection if this is a new track, or if we have been disconnected.
if (!pushTracks.count(thisIdx) || !pushTracks.at(thisIdx).D.getSocket()){
if (pushTracks.count(thisIdx)){INFO_MSG("Reconnecting existing track: socket was disconnected");}
CMAFPushTrack & track = pushTracks[thisIdx];
size_t keyIndex = M.getKeyIndexForTime(getMainSelectedTrack(), thisPacket.getTime());
track.headerFrom = M.getTimeForKeyIndex(getMainSelectedTrack(), keyIndex);
size_t keyIndex = M.getKeyIndexForTime(mTrk, thisPacket.getTime());
track.headerFrom = M.getTimeForKeyIndex(mTrk, keyIndex);
if (track.headerFrom < thisPacket.getTime()){
track.headerFrom = M.getTimeForKeyIndex(getMainSelectedTrack(), keyIndex + 1);
track.headerFrom = M.getTimeForKeyIndex(mTrk, keyIndex + 1);
}
INFO_MSG("Starting track %zu at %" PRIu64 "ms into the stream, current packet at %" PRIu64 "ms", thisIdx, track.headerFrom, thisPacket.getTime());
@ -846,14 +846,18 @@ namespace Mist{
CMAFPushTrack & track = pushTracks[thisIdx];
if (thisPacket.getTime() < track.headerFrom){return;}
if (thisPacket.getTime() >= track.headerUntil){
size_t keyIndex = M.getKeyIndexForTime(getMainSelectedTrack(), thisPacket.getTime());
uint64_t keyTime = M.getTimeForKeyIndex(getMainSelectedTrack(), keyIndex);
if (keyTime > thisPacket.getTime()){
WARN_MSG("Corruption probably occurred, initiating reconnect %" PRIu64 " != %" PRIu64, keyTime, thisPacket.getTime());
size_t keyIndex = M.getKeyIndexForTime(mTrk, thisTime);
uint64_t keyTime = M.getTimeForKeyIndex(mTrk, keyIndex);
if (keyTime > thisTime){
realTime = 1000;
if (!liveSeek()){
WARN_MSG("Corruption probably occurred, initiating reconnect. Key %zu is time %" PRIu64 ", but packet is time %" PRIu64, keyIndex, keyTime, thisTime);
onTrackEnd(thisIdx);
track.headerFrom = M.getTimeForKeyIndex(getMainSelectedTrack(), keyIndex + 1);
track.headerFrom = M.getTimeForKeyIndex(mTrk, keyIndex + 1);
track.headerUntil = 0;
pushNext();
}
realTime = 0;
return;
}
track.headerFrom = keyTime;
@ -862,7 +866,7 @@ namespace Mist{
dropTrack(thisIdx, "No next keyframe available");
return;
}
track.headerUntil = M.getTimeForKeyIndex(getMainSelectedTrack(), keyIndex + 1);
track.headerUntil = M.getTimeForKeyIndex(mTrk, keyIndex + 1);
std::string keyHeader = CMAF::keyHeader(M, thisIdx, track.headerFrom, track.headerUntil, keyIndex+1, true, true);
uint64_t mdatSize = 8 + CMAF::payloadSize(M, thisIdx, track.headerFrom, track.headerUntil);
char mdatHeader[] ={0x00, 0x00, 0x00, 0x00, 'm', 'd', 'a', 't'};

2
src/output/output_cmaf.h
View file

@ -69,7 +69,7 @@ namespace Mist{
HTTP::URL pushUrl;
std::map<size_t, CMAFPushTrack> pushTracks;
void setupTrackObject(size_t idx);
bool waitForNextKey(uint64_t maxWait = 5000);
bool waitForNextKey(uint64_t maxWait = 15000);
// End CMAF push out
};
}// namespace Mist