GF_Err MergeTrack(GF_TrackBox *trak, GF_TrackFragmentBox *traf, u64 moof_offset, Bool is_first_merge)
{
u32 i, j, chunk_size;
u64 base_offset, data_offset;
u32 def_duration, DescIndex, def_size, def_flags;
u32 duration, size, flags, cts_offset, prev_trun_data_offset;
u8 pad, sync;
u16 degr;
GF_TrackFragmentRunBox *trun;
GF_TrunEntry *ent;
void stbl_AppendTime(GF_SampleTableBox *stbl, u32 duration);
void stbl_AppendSize(GF_SampleTableBox *stbl, u32 size);
void stbl_AppendChunk(GF_SampleTableBox *stbl, u64 offset);
void stbl_AppendSampleToChunk(GF_SampleTableBox *stbl, u32 DescIndex, u32 samplesInChunk);
void stbl_AppendCTSOffset(GF_SampleTableBox *stbl, u32 CTSOffset);
void stbl_AppendRAP(GF_SampleTableBox *stbl, u8 isRap);
void stbl_AppendPadding(GF_SampleTableBox *stbl, u8 padding);
void stbl_AppendDegradation(GF_SampleTableBox *stbl, u16 DegradationPriority);
if (trak->Header->trackID != traf->tfhd->trackID) return GF_OK;
//setup all our defaults
DescIndex = (traf->tfhd->flags & GF_ISOM_TRAF_SAMPLE_DESC) ? traf->tfhd->sample_desc_index : traf->trex->def_sample_desc_index;
def_duration = (traf->tfhd->flags & GF_ISOM_TRAF_SAMPLE_DUR) ? traf->tfhd->def_sample_duration : traf->trex->def_sample_duration;
def_size = (traf->tfhd->flags & GF_ISOM_TRAF_SAMPLE_SIZE) ? traf->tfhd->def_sample_size : traf->trex->def_sample_size;
def_flags = (traf->tfhd->flags & GF_ISOM_TRAF_SAMPLE_FLAGS) ? traf->tfhd->def_sample_flags : traf->trex->def_sample_flags;
//locate base offset
base_offset = (traf->tfhd->flags & GF_ISOM_TRAF_BASE_OFFSET) ? traf->tfhd->base_data_offset : moof_offset;
chunk_size = 0;
prev_trun_data_offset = 0;
/*in playback mode*/
if (traf->tfdt && is_first_merge) {
#ifndef GPAC_DISABLE_LOG
if (trak->sample_count_at_seg_start && (trak->dts_at_seg_start != traf->tfdt->baseMediaDecodeTime)) {
s32 drift = (s32) ((s64)trak->dts_at_seg_start - (s64) traf->tfdt->baseMediaDecodeTime);
if (drift<0) drift = -drift;
if (drift > 1) {
GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("[iso file] Error: TFDT timing "LLD" different from track cumulated timing "LLD" - using tfdt\n", traf->tfdt->baseMediaDecodeTime, trak->dts_at_seg_start ));
}
}
#endif
trak->dts_at_seg_start = traf->tfdt->baseMediaDecodeTime;
}
i=0;
while ((trun = (GF_TrackFragmentRunBox *)gf_list_enum(traf->TrackRuns, &i))) {
//merge the run
for (j=0; j<trun->sample_count; j++) {
ent = (GF_TrunEntry*)gf_list_get(trun->entries, j);
size = def_size;
duration = def_duration;
flags = def_flags;
if (ent) {
if (trun->flags & GF_ISOM_TRUN_DURATION) duration = ent->Duration;
if (trun->flags & GF_ISOM_TRUN_SIZE) size = ent->size;
if (trun->flags & GF_ISOM_TRUN_FLAGS) {
flags = ent->flags;
} else if (!j && (trun->flags & GF_ISOM_TRUN_FIRST_FLAG)) {
flags = trun->first_sample_flags;
}
}
//add size first
stbl_AppendSize(trak->Media->information->sampleTable, size);
//then TS
stbl_AppendTime(trak->Media->information->sampleTable, duration);
//add chunk on first sample
if (!j) {
data_offset = base_offset;
//aggregated offset if base-data-offset-present is not set AND if default-base-is-moof is not set
if (!(traf->tfhd->flags & GF_ISOM_TRAF_BASE_OFFSET) && !(traf->tfhd->flags & GF_ISOM_MOOF_BASE_OFFSET) )
data_offset += chunk_size;
if (trun->flags & GF_ISOM_TRUN_DATA_OFFSET) {
data_offset += trun->data_offset;
/*reset chunk size since data is now relative to this trun*/
chunk_size = 0;
/*remember this data offset for following trun*/
prev_trun_data_offset = trun->data_offset;
} else {
/*data offset is previous chunk size plus previous offset of the trun*/
data_offset += prev_trun_data_offset;
}
stbl_AppendChunk(trak->Media->information->sampleTable, data_offset);
//then sampleToChunk
stbl_AppendSampleToChunk(trak->Media->information->sampleTable,
DescIndex, trun->sample_count);
}
chunk_size += size;
//CTS
cts_offset = (trun->flags & GF_ISOM_TRUN_CTS_OFFSET) ? ent->CTS_Offset : 0;
stbl_AppendCTSOffset(trak->Media->information->sampleTable, cts_offset);
//flags
sync = GF_ISOM_GET_FRAG_SYNC(flags);
stbl_AppendRAP(trak->Media->information->sampleTable, sync);
pad = GF_ISOM_GET_FRAG_PAD(flags);
if (pad) stbl_AppendPadding(trak->Media->information->sampleTable, pad);
degr = GF_ISOM_GET_FRAG_DEG(flags);
if (degr) stbl_AppendDegradation(trak->Media->information->sampleTable, degr);
}
}
/*merge sample groups*/
if (traf->sampleGroups) {
GF_List *groups;
GF_List *groupDescs;
if (!trak->Media->information->sampleTable->sampleGroups)
trak->Media->information->sampleTable->sampleGroups = gf_list_new();
if (!trak->Media->information->sampleTable->sampleGroupsDescription)
trak->Media->information->sampleTable->sampleGroupsDescription = gf_list_new();
groupDescs = trak->Media->information->sampleTable->sampleGroupsDescription;
for (i=0; i<gf_list_count(traf->sampleGroupsDescription); i++) {
GF_SampleGroupDescriptionBox *new_sgdesc = NULL;
GF_SampleGroupDescriptionBox *sgdesc = gf_list_get(traf->sampleGroupsDescription, i);
for (j=0; j<gf_list_count(groupDescs); j++) {
new_sgdesc = gf_list_get(groupDescs, j);
if (new_sgdesc->grouping_type==sgdesc->grouping_type) break;
new_sgdesc = NULL;
}
/*new description, move it to our sample table*/
if (!new_sgdesc) {
gf_list_add(groupDescs, sgdesc);
gf_list_rem(traf->sampleGroupsDescription, i);
i--;
}
/*merge descriptions*/
else {
u32 idx = gf_list_count(new_sgdesc->group_descriptions);
for (j=idx; j<gf_list_count(sgdesc->group_descriptions); j++) {
void *ptr = gf_list_get(sgdesc->group_descriptions, j);
if (ptr) {
gf_list_add(new_sgdesc->group_descriptions, ptr);
gf_list_rem(sgdesc->group_descriptions, j);
j--;
}
}
}
}
groups = trak->Media->information->sampleTable->sampleGroups;
for (i=0; i<gf_list_count(traf->sampleGroups); i++) {
GF_SampleGroupBox *stbl_group = NULL;
GF_SampleGroupBox *frag_group = gf_list_get(traf->sampleGroups, i);
for (j=0; j<gf_list_count(groups); j++) {
stbl_group = gf_list_get(groups, j);
if ((frag_group->grouping_type==stbl_group->grouping_type) && (frag_group->grouping_type_parameter==stbl_group->grouping_type_parameter))
break;
stbl_group = NULL;
}
if (!stbl_group) {
stbl_group = (GF_SampleGroupBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_SBGP);
stbl_group->grouping_type = frag_group->grouping_type;
stbl_group->grouping_type_parameter = frag_group->grouping_type_parameter;
stbl_group->version = frag_group->version;
gf_list_add(groups, stbl_group);
}
if (frag_group->entry_count && stbl_group->entry_count &&
(frag_group->sample_entries[0].group_description_index==stbl_group->sample_entries[stbl_group->entry_count-1].group_description_index)
) {
stbl_group->sample_entries[stbl_group->entry_count - 1].sample_count += frag_group->sample_entries[0].sample_count;
if (frag_group->entry_count>1) {
stbl_group->sample_entries = gf_realloc(stbl_group->sample_entries, sizeof(GF_SampleGroupEntry) * (stbl_group->entry_count + frag_group->entry_count - 1));
memcpy(&stbl_group->sample_entries[stbl_group->entry_count], &frag_group->sample_entries[1], sizeof(GF_SampleGroupEntry) * (frag_group->entry_count - 1));
stbl_group->entry_count += frag_group->entry_count - 1;
}
} else {
stbl_group->sample_entries = gf_realloc(stbl_group->sample_entries, sizeof(GF_SampleGroupEntry) * (stbl_group->entry_count + frag_group->entry_count));
memcpy(&stbl_group->sample_entries[stbl_group->entry_count], &frag_group->sample_entries[0], sizeof(GF_SampleGroupEntry) * frag_group->entry_count);
stbl_group->entry_count += frag_group->entry_count;
}
}
}
return GF_OK;
}
M4Err MergeTrack(TrackAtom *trak, TrackFragmentAtom *traf, u64 *moof_offset)
{
u32 i, j, chunk_size;
u64 base_offset, data_offset;
u32 def_duration, DescIndex, def_size, def_flags;
u32 duration, size, flags, cts_offset;
u8 pad, sync;
u16 degr;
TrackFragmentRunAtom *trun;
TrunEntry *ent;
void stbl_AppendTime(SampleTableAtom *stbl, u32 duration);
void stbl_AppendSize(SampleTableAtom *stbl, u32 size);
void stbl_AppendChunk(SampleTableAtom *stbl, u64 offset);
void stbl_AppendSampleToChunk(SampleTableAtom *stbl, u32 DescIndex, u32 samplesInChunk);
void stbl_AppendCTSOffset(SampleTableAtom *stbl, u32 CTSOffset);
void stbl_AppendRAP(SampleTableAtom *stbl, u8 isRap);
void stbl_AppendPadding(SampleTableAtom *stbl, u8 padding);
void stbl_AppendDegradation(SampleTableAtom *stbl, u16 DegradationPriority);
//setup all our defaults
DescIndex = (traf->tfhd->flags & TF_SAMPLE_DESC) ? traf->tfhd->sample_desc_index : traf->trex->def_sample_desc_index;
def_duration = (traf->tfhd->flags & TF_SAMPLE_DUR) ? traf->tfhd->def_sample_duration : traf->trex->def_sample_duration;
def_size = (traf->tfhd->flags & TF_SAMPLE_SIZE) ? traf->tfhd->def_sample_size : traf->trex->def_sample_size;
def_flags = (traf->tfhd->flags & TF_SAMPLE_FLAGS) ? traf->tfhd->def_sample_flags : traf->trex->def_sample_flags;
//locate base offset
base_offset = (traf->tfhd->flags & TF_BASE_OFFSET) ? traf->tfhd->base_data_offset : *moof_offset;
chunk_size = 0;
for (i=0; i<ChainGetCount(traf->TrackRuns); i++) {
trun = ChainGetEntry(traf->TrackRuns, i);
//merge the run
for (j=0;j<trun->sample_count; j++) {
ent = ChainGetEntry(trun->entries, j);
size = def_size;
duration = def_duration;
flags = def_flags;
if (ent) {
if (trun->flags & TR_DURATION) duration = ent->Duration;
if (trun->flags & TR_SIZE) size = ent->size;
if (trun->flags & TR_FLAGS) {
flags = ent->flags;
} else if (!j && (trun->flags & TR_FIRST_FLAG)) {
flags = trun->first_sample_flags;
}
}
//add size first
stbl_AppendSize(trak->Media->information->sampleTable, size);
//then TS
stbl_AppendTime(trak->Media->information->sampleTable, duration);
//add chunk on first sample
if (!j) {
data_offset = base_offset;
//aggregated offset
if (!(traf->tfhd->flags & TF_BASE_OFFSET)) data_offset += chunk_size;
if (trun->flags & TR_DATA_OFFSET) data_offset += trun->data_offset;
stbl_AppendChunk(trak->Media->information->sampleTable, data_offset);
//then sampleToChunk
stbl_AppendSampleToChunk(trak->Media->information->sampleTable,
DescIndex, trun->sample_count);
}
chunk_size += size;
//CTS
cts_offset = (trun->flags & TR_CTS_OFFSET) ? ent->CTS_Offset : 0;
if (cts_offset) stbl_AppendCTSOffset(trak->Media->information->sampleTable, cts_offset);
//flags
sync = GET_FRAG_SYNC(flags);
stbl_AppendRAP(trak->Media->information->sampleTable, sync);
pad = GET_FRAG_PAD(flags);
if (pad) stbl_AppendPadding(trak->Media->information->sampleTable, pad);
degr = GET_FRAG_DEG(flags);
if (degr) stbl_AppendDegradation(trak->Media->information->sampleTable, degr);
}
}
//end of the fragment, update offset
*moof_offset += chunk_size;
return M4OK;
}
