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Check keyTimingsMatch in DTSC

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Siddarth Tegginamani 2021-11-10 12:21:41 +01:00 • committed by Thulinma
parent b19c642034
commit 4033f1d009
2 changed files with 33 additions and 0 deletions
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32
lib/dtsc.cpp
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@ -3332,6 +3332,38 @@ namespace DTSC{
// return is by reference
}
/// Returns true if the tracks idx1 and idx2 are keyframe aligned
bool Meta::keyTimingsMatch(size_t idx1, size_t idx2) const {
const DTSC::Track &t1 = tracks.at(idx1);
const DTSC::Track &t2 = tracks.at(idx2);
uint64_t t1Firstms = t1.track.getInt(t1.trackFirstmsField);
uint64_t t2Firstms = t2.track.getInt(t2.trackFirstmsField);
uint64_t firstms = t1Firstms > t2Firstms ? t1Firstms : t2Firstms;
uint64_t t1Lastms = t1.track.getInt(t1.trackFirstmsField);
uint64_t t2Lastms = t2.track.getInt(t2.trackFirstmsField);
uint64_t lastms = t1Lastms > t2Lastms ? t1Lastms : t2Lastms;
if (firstms > lastms) {
WARN_MSG("Cannot check for timing alignment for tracks %zu and %zu: No overlap", idx1, idx2);
return false;
}
uint32_t keyIdx1 = getKeyIndexForTime(idx1,firstms);
uint32_t keyIdx2 = getKeyIndexForTime(idx2,firstms);
DTSC::Keys keys1(tracks.at(idx1).keys);
DTSC::Keys keys2(tracks.at(idx2).keys);
while(true) {
if (lastms < keys1.getTime(keyIdx1) || lastms < keys2.getTime(keyIdx2)) {return true;}
if (keys1.getTime(keyIdx1) != keys2.getTime(keyIdx2)) {return false;}
keyIdx1++;
keyIdx2++;
}
return true;
}
Parts::Parts(const Util::RelAccX &_parts) : parts(_parts){
sizeField = parts.getFieldData("size");
durationField = parts.getFieldData("duration");

1
lib/dtsc.h
View file

@ -450,6 +450,7 @@ namespace DTSC{
size_t getPageNumberForTime(uint32_t idx, uint64_t time) const;
size_t getPageNumberForKey(uint32_t idx, uint64_t keynumber) const;
size_t getKeyNumForTime(uint32_t idx, uint64_t time) const;
bool keyTimingsMatch(size_t idx1, size_t idx2) const;
const Util::RelAccX &parts(size_t idx) const;
Util::RelAccX &keys(size_t idx);