Moof::Moof(Box& aBox, Trex& aTrex, Mvhd& aMvhd, Mdhd& aMdhd, Edts& aEdts, Sinf& aSinf, bool aIsAudio)
: mRange(aBox.Range())
, mMaxRoundingError(35000)
{
for (Box box = aBox.FirstChild(); box.IsAvailable(); box = box.Next()) {
if (box.IsType("traf")) {
ParseTraf(box, aTrex, aMvhd, aMdhd, aEdts, aSinf, aIsAudio);
}
}
if (IsValid()) {
ProcessCenc();
}
}
Moof::Moof(Box& aBox, Trex& aTrex, Mvhd& aMvhd, Mdhd& aMdhd, Edts& aEdts, Sinf& aSinf, uint64_t* aDecodeTime, bool aIsAudio)
: mRange(aBox.Range())
, mMaxRoundingError(35000)
{
for (Box box = aBox.FirstChild(); box.IsAvailable(); box = box.Next()) {
if (box.IsType("traf")) {
ParseTraf(box, aTrex, aMvhd, aMdhd, aEdts, aSinf, aDecodeTime, aIsAudio);
}
}
if (IsValid()) {
if (mIndex.Length()) {
// Ensure the samples are contiguous with no gaps.
nsTArray<Sample*> ctsOrder;
for (auto& sample : mIndex) {
ctsOrder.AppendElement(&sample);
}
ctsOrder.Sort(CtsComparator());
for (size_t i = 1; i < ctsOrder.Length(); i++) {
ctsOrder[i-1]->mCompositionRange.end = ctsOrder[i]->mCompositionRange.start;
}
// In MP4, the duration of a sample is defined as the delta between two decode
// timestamps. The operation above has updated the duration of each sample
// as a Sample's duration is mCompositionRange.end - mCompositionRange.start
// MSE's TrackBuffersManager expects dts that increased by the sample's
// duration, so we rewrite the dts accordingly.
int64_t presentationDuration =
ctsOrder.LastElement()->mCompositionRange.end
- ctsOrder[0]->mCompositionRange.start;
int64_t endDecodeTime =
aMdhd.ToMicroseconds((int64_t)*aDecodeTime - aEdts.mMediaStart)
+ aMvhd.ToMicroseconds(aEdts.mEmptyOffset);
int64_t decodeDuration = endDecodeTime - mIndex[0].mDecodeTime;
double adjust = (double)decodeDuration / presentationDuration;
int64_t dtsOffset = mIndex[0].mDecodeTime;
int64_t compositionDuration = 0;
// Adjust the dts, ensuring that the new adjusted dts will never be greater
// than decodeTime (the next moof's decode start time).
for (auto& sample : mIndex) {
sample.mDecodeTime = dtsOffset + int64_t(compositionDuration * adjust);
compositionDuration += sample.mCompositionRange.Length();
}
mTimeRange = Interval<Microseconds>(ctsOrder[0]->mCompositionRange.start,
ctsOrder.LastElement()->mCompositionRange.end);
}
ProcessCenc();
}
}
Moof::Moof(Box& aBox, Trex& aTrex, Mvhd& aMvhd, Mdhd& aMdhd, Edts& aEdts, Sinf& aSinf, uint64_t* aDecodeTime, bool aIsAudio)
: mRange(aBox.Range())
, mMaxRoundingError(35000)
{
nsTArray<Box> psshBoxes;
for (Box box = aBox.FirstChild(); box.IsAvailable(); box = box.Next()) {
if (box.IsType("traf")) {
ParseTraf(box, aTrex, aMvhd, aMdhd, aEdts, aSinf, aDecodeTime, aIsAudio);
}
if (box.IsType("pssh")) {
psshBoxes.AppendElement(box);
}
}
// The EME spec requires that PSSH boxes which are contiguous in the
// file are dispatched to the media element in a single "encrypted" event.
// So append contiguous boxes here.
for (size_t i = 0; i < psshBoxes.Length(); ++i) {
Box box = psshBoxes[i];
if (i == 0 || box.Offset() != psshBoxes[i - 1].NextOffset()) {
mPsshes.AppendElement();
}
nsTArray<uint8_t>& pssh = mPsshes.LastElement();
pssh.AppendElements(box.Header());
pssh.AppendElements(box.Read());
}
if (IsValid()) {
if (mIndex.Length()) {
// Ensure the samples are contiguous with no gaps.
nsTArray<Sample*> ctsOrder;
for (auto& sample : mIndex) {
ctsOrder.AppendElement(&sample);
}
ctsOrder.Sort(CtsComparator());
for (size_t i = 1; i < ctsOrder.Length(); i++) {
ctsOrder[i-1]->mCompositionRange.end = ctsOrder[i]->mCompositionRange.start;
}
// In MP4, the duration of a sample is defined as the delta between two decode
// timestamps. The operation above has updated the duration of each sample
// as a Sample's duration is mCompositionRange.end - mCompositionRange.start
// MSE's TrackBuffersManager expects dts that increased by the sample's
// duration, so we rewrite the dts accordingly.
int64_t presentationDuration =
ctsOrder.LastElement()->mCompositionRange.end
- ctsOrder[0]->mCompositionRange.start;
auto decodeOffset = aMdhd.ToMicroseconds((int64_t)*aDecodeTime - aEdts.mMediaStart);
auto offsetOffset = aMvhd.ToMicroseconds(aEdts.mEmptyOffset);
int64_t endDecodeTime = decodeOffset.isOk() & offsetOffset.isOk() ?
decodeOffset.unwrap() + offsetOffset.unwrap() : 0;
int64_t decodeDuration = endDecodeTime - mIndex[0].mDecodeTime;
double adjust = !!presentationDuration ? (double)decodeDuration / presentationDuration : 0;
int64_t dtsOffset = mIndex[0].mDecodeTime;
int64_t compositionDuration = 0;
// Adjust the dts, ensuring that the new adjusted dts will never be greater
// than decodeTime (the next moof's decode start time).
for (auto& sample : mIndex) {
sample.mDecodeTime = dtsOffset + int64_t(compositionDuration * adjust);
compositionDuration += sample.mCompositionRange.Length();
}
mTimeRange = MP4Interval<Microseconds>(ctsOrder[0]->mCompositionRange.start,
ctsOrder.LastElement()->mCompositionRange.end);
}
ProcessCenc();
}
}
