M4Err SetTrackDuration(TrackAtom *trak)
{
u64 trackDuration;
u32 i;
edtsEntry *ent;
EditListAtom *elst;
M4Err e;
//if we have an edit list, the duration is the sum of all the editList
//entries' duration (always expressed in MovieTimeScale)
if (trak->EditAtom && trak->EditAtom->editList) {
trackDuration = 0;
elst = trak->EditAtom->editList;
for (i = 0; i<ChainGetCount(elst->entryList); i++) {
ent = (edtsEntry*)ChainGetEntry(elst->entryList, i);
trackDuration += ent->segmentDuration;
}
} else {
//the total duration is the media duration: adjust it in case...
e = Media_SetDuration(trak);
if (e) return e;
//assert the timeScales are non-NULL
if (!trak->moov->mvhd->timeScale && !trak->Media->mediaHeader->timeScale) return M4InvalidMP4File;
trackDuration = (trak->Media->mediaHeader->duration * trak->moov->mvhd->timeScale) / trak->Media->mediaHeader->timeScale;
}
trak->Header->duration = trackDuration;
trak->Header->modificationTime = GetMP4Time();
return M4OK;
}
GF_Err SetTrackDuration(GF_TrackBox *trak)
{
u64 trackDuration;
u32 i;
GF_EdtsEntry *ent;
GF_EditListBox *elst;
GF_Err e;
//the total duration is the media duration: adjust it in case...
e = Media_SetDuration(trak);
if (e) return e;
//assert the timeScales are non-NULL
if (!trak->moov->mvhd->timeScale || !trak->Media->mediaHeader->timeScale) return GF_ISOM_INVALID_FILE;
trackDuration = (trak->Media->mediaHeader->duration * trak->moov->mvhd->timeScale) / trak->Media->mediaHeader->timeScale;
//if we have an edit list, the duration is the sum of all the editList
//entries' duration (always expressed in MovieTimeScale)
if (trak->editBox && !trak->editBox->last_is_empty && trak->editBox->editList) {
trackDuration = 0;
elst = trak->editBox->editList;
i=0;
while ((ent = (GF_EdtsEntry*)gf_list_enum(elst->entryList, &i))) {
trackDuration += ent->segmentDuration;
if (ent->mediaRate && !ent->segmentDuration) {
trak->editBox->last_is_empty = 1;
}
}
if (trak->editBox->last_is_empty) {
ent = (GF_EdtsEntry*) gf_list_last(elst->entryList);
ent->segmentDuration = trackDuration;
}
}
trak->Header->duration = trackDuration;
trak->Header->modificationTime = gf_isom_get_mp4time();
return GF_OK;
}
