hydrar/mistserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Bug Fix: CMAF DASH playback works

Browse source 
- syntax error fixed
- removed unnecessary track id simplification
This commit is contained in:
Siddarth Tegginamani 2022-01-05 15:03:38 +01:00 • committed by Thulinma
parent e9d5920a80
commit ccee512b3d
2 changed files with 43 additions and 49 deletions
Download patch file Download diff file Expand all files Collapse all files

54
lib/cmaf.cpp
View file

@ -13,14 +13,6 @@ namespace CMAF{
return payloadSize;
}
size_t simplifiedTrackId(const DTSC::Meta & M, size_t idx) {
std::string type = M.getType(idx);
if (type == "video") {return 1;}
if (type == "audio") {return 2;}
if (type == "meta") {return 3;}
return idx;
}
std::string trackHeader(const DTSC::Meta &M, size_t track, bool simplifyTrackIds){
std::string tType = M.getType(track);
@ -43,9 +35,6 @@ namespace CMAF{
MP4::TRAK trakBox;
MP4::TKHD tkhdBox(M, track);
if (simplifyTrackIds){
tkhdBox.setTrackID(simplifiedTrackId(M, track));
}
tkhdBox.setDuration(0);
trakBox.setContent(tkhdBox, 0);
@ -87,7 +76,7 @@ namespace CMAF{
btrtBox.setAverageBitrate(M.getBps(track));
btrtBox.setMaxBitrate(M.getMaxBps(track));
sampleEntry.setBoxEntry(sampleEntry.getBoxEntryCount(),btrtBox);
sampleEntry.setBoxEntry(sampleEntry.getBoxEntryCount(), btrtBox);
stsdBox.setEntry(sampleEntry, 0);
}else if (tType == "audio"){
MP4::AudioSampleEntry sampleEntry(M, track);
@ -96,7 +85,7 @@ namespace CMAF{
btrtBox.setAverageBitrate(M.getBps(track));
btrtBox.setMaxBitrate(M.getMaxBps(track));
sampleEntry.setBoxEntry(sampleEntry.getBoxEntryCount(),btrtBox);
sampleEntry.setBoxEntry(sampleEntry.getBoxEntryCount(), btrtBox);
stsdBox.setEntry(sampleEntry, 0);
}else if (tType == "meta"){
MP4::TextSampleEntry sampleEntry(M, track);
@ -131,9 +120,6 @@ namespace CMAF{
}
MP4::TREX trexBox(track + 1);
if (simplifyTrackIds){
trexBox.setTrackID(simplifiedTrackId(M, track));
}
trexBox.setDefaultSampleDuration(1000);
mvexBox.setContent(trexBox, M.getVod() ? 1 : 0);
@ -148,7 +134,8 @@ namespace CMAF{
MP4::SIDX sidxBox;
sidxBox.setReferenceID(track + 1);
sidxBox.setTimescale(1000);
sidxBox.setEarliestPresentationTime(keys.getTime(0) + parts.getOffset(0) - M.getFirstms(track));
sidxBox.setEarliestPresentationTime(keys.getTime(0) + parts.getOffset(0) -
M.getFirstms(track));
for (size_t i = 0; i < fragments.getEndValid(); i++){
size_t firstKey = fragments.getFirstKey(i);
@ -156,9 +143,12 @@ namespace CMAF{
((i + 1 < fragments.getEndValid()) ? fragments.getFirstKey(i + 1) : keys.getEndValid());
MP4::sidxReference refItem;
refItem.referencedSize = payloadSize(M, track, keys.getTime(firstKey), keys.getTime(endKey)) + keyHeaderSize(M, track, i) + 8;
refItem.referencedSize =
payloadSize(M, track, keys.getTime(firstKey), keys.getTime(endKey)) +
keyHeaderSize(M, track, i) + 8;
refItem.subSegmentDuration =
(endKey == keys.getEndValid() ? M.getLastms(track) : keys.getTime(endKey)) - keys.getTime(firstKey);
(endKey == keys.getEndValid() ? M.getLastms(track) : keys.getTime(endKey)) -
keys.getTime(firstKey);
refItem.sapStart = true;
refItem.sapType = 16;
refItem.sapDeltaTime = 0;
@ -209,7 +199,8 @@ namespace CMAF{
}
/// Generates the 'moof' box for a DTSC::Key based CMAF fragment.
std::string keyHeader(const DTSC::Meta &M, size_t track, uint64_t startTime, uint64_t endTime, uint64_t segmentNum, bool simplifyTrackIds, bool UTCTime){
std::string keyHeader(const DTSC::Meta &M, size_t track, uint64_t startTime, uint64_t endTime,
uint64_t segmentNum, bool simplifyTrackIds, bool UTCTime){
size_t firstPart = M.getPartIndex(startTime, track);
size_t endPart = M.getPartIndex(endTime, track);
@ -218,10 +209,9 @@ namespace CMAF{
MP4::MFHD mfhdBox(segmentNum);
moofBox.setContent(mfhdBox, 0);
std::set<sortPart> trunOrder;
//We use keyHeaderSize here to determine the relative offsets of the data in the 'mdat' box.
// We use keyHeaderSize here to determine the relative offsets of the data in the 'mdat' box.
uint64_t relativeOffset = keyHeaderSize(M, track, startTime, endTime) + 8;
sortPart temp;
@ -242,13 +232,11 @@ namespace CMAF{
tfhdBox.setFlags(MP4::tfhdSampleFlag | MP4::tfhdBaseIsMoof | MP4::tfhdSampleDesc);
tfhdBox.setTrackID(track + 1);
if (simplifyTrackIds){
tfhdBox.setTrackID(simplifiedTrackId(M, track));
}
tfhdBox.setDefaultSampleDuration(444);
tfhdBox.setDefaultSampleSize(444);
tfhdBox.setDefaultSampleFlags((M.getType(track) == "video") ? (MP4::noIPicture | MP4::noKeySample)
: (MP4::isIPicture | MP4::isKeySample));
tfhdBox.setDefaultSampleFlags((M.getType(track) == "video")
? (MP4::noIPicture | MP4::noKeySample)
: (MP4::isIPicture | MP4::isKeySample));
tfhdBox.setSampleDescriptionIndex(1);
trafBox.setContent(tfhdBox, 0);
@ -256,7 +244,8 @@ namespace CMAF{
if (M.getVod()){
tfdtBox.setBaseMediaDecodeTime(startTime - M.getFirstms(track));
}else{
tfdtBox.setBaseMediaDecodeTime((UTCTime ? startTime + M.getBootMsOffset() + unixBootDiff : startTime));
tfdtBox.setBaseMediaDecodeTime(
(UTCTime ? startTime + M.getBootMsOffset() + unixBootDiff : startTime));
}
trafBox.setContent(tfdtBox, 1);
@ -277,15 +266,14 @@ namespace CMAF{
MP4::trunSampleInformation sampleInfo;
sampleInfo.sampleSize = parts.getSize(it->partIndex);
sampleInfo.sampleDuration = parts.getDuration(it->partIndex);
if (it == lastOne){
sampleInfo.sampleDuration = endTime - it->time;
}
if (it == lastOne){sampleInfo.sampleDuration = endTime - it->time;}
sampleInfo.sampleOffset = parts.getOffset(it->partIndex);
trunBox.setSampleInformation(sampleInfo, trunOffset++);
}
}else{
WARN_MSG("Empty CMAF header for track %zu: %" PRIu64 "-%" PRIu64 " contains no packets (first: %" PRIu64
", last: %" PRIu64 "), firstPart=%zu, lastPart=%zu",
WARN_MSG("Empty CMAF header for track %zu: %" PRIu64 "-%" PRIu64
" contains no packets (first: %" PRIu64 ", last: %" PRIu64
"), firstPart=%zu, lastPart=%zu",
track, startTime, endTime, M.getFirstms(track), M.getLastms(track), firstPart,
endPart);
}