static GF_Err ShiftOffset(GF_ISOFile *file, GF_List *writers, u64 offset, u8 *converted)
{
u32 i, j, end;
TrackWriter *writer;
GF_StscEntry *ent;
GF_Box *box;
GF_Err result;
*converted = 0;
if (file->meta) ShiftMetaOffset(file->meta, offset);
if (file->moov && file->moov->meta) ShiftMetaOffset(file->moov->meta, offset);
i=0;
while ((writer = (TrackWriter *)gf_list_enum(writers, &i))) {
if (writer->mdia->mediaTrack->meta) ShiftMetaOffset(writer->mdia->mediaTrack->meta, offset);
//we have to proceed entry by entry in case a part of the media is not self-contained...
for (j=0; j<writer->stsc->nb_entries; j++) {
ent = &writer->stsc->entries[j];
if (!Media_IsSelfContained(writer->mdia, ent->sampleDescriptionIndex)) continue;
if (writer->stco->type == GF_ISOM_BOX_TYPE_STCO)
end = ent->nextChunk ? ent->nextChunk : ((GF_ChunkOffsetBox *)writer->stco)->nb_entries + 1;
else
end = ent->nextChunk ? ent->nextChunk : ((GF_ChunkLargeOffsetBox *)writer->stco)->nb_entries + 1;
box = writer->stco;
if ((result = stbl_ShiftOffset(&box, offset, ent->firstChunk, end)) != GF_OK)
return result;
if (box != writer->stco) {
writer->stco = box;
*converted = 1;
}
}
}
return GF_OK;
}
static GF_Err ShiftOffset(GF_ISOFile *file, GF_List *writers, u64 offset)
{
u32 i, j, k, l, last;
TrackWriter *writer;
GF_StscEntry *ent;
GF_ChunkOffsetBox *stco;
GF_ChunkLargeOffsetBox *co64;
if (file->meta) ShiftMetaOffset(file->meta, offset);
if (file->moov && file->moov->meta) ShiftMetaOffset(file->moov->meta, offset);
i=0;
while ((writer = (TrackWriter *)gf_list_enum(writers, &i))) {
if (writer->mdia->mediaTrack->meta) ShiftMetaOffset(writer->mdia->mediaTrack->meta, offset);
//we have to proceed entry by entry in case a part of the media is not self-contained...
for (j=0; j<writer->stsc->nb_entries; j++) {
ent = &writer->stsc->entries[j];
if (!Media_IsSelfContained(writer->mdia, ent->sampleDescriptionIndex)) continue;
//OK, get the chunk(s) number(s) and "shift" its (their) offset(s).
if (writer->stco->type == GF_ISOM_BOX_TYPE_STCO) {
stco = (GF_ChunkOffsetBox *) writer->stco;
//be carefull for the last entry, nextChunk is set to 0 in edit mode...
last = ent->nextChunk ? ent->nextChunk : stco->nb_entries + 1;
for (k = ent->firstChunk; k < last; k++) {
if (stco->offsets[k-1] + offset > 0xFFFFFFFF) {
//too bad, rewrite the table....
co64 = (GF_ChunkLargeOffsetBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_CO64);
if (!co64) return GF_OUT_OF_MEM;
co64->nb_entries = stco->nb_entries;
co64->offsets = (u64*)gf_malloc(co64->nb_entries * sizeof(u64));
if (!co64) {
gf_isom_box_del((GF_Box *)co64);
return GF_OUT_OF_MEM;
}
//duplicate the table
for (l = 0; l < co64->nb_entries; l++) {
co64->offsets[l] = (u64) stco->offsets[l];
if (l + 1 == k) co64->offsets[l] += offset;
}
//and replace our box
gf_isom_box_del(writer->stco);
writer->stco = (GF_Box *)co64;
} else {
stco->offsets[k-1] += (u32) offset;
}
}
} else {
co64 = (GF_ChunkLargeOffsetBox *) writer->stco;
//be carefull for the last entry ...
last = ent->nextChunk ? ent->nextChunk : co64->nb_entries + 1;
for (k = ent->firstChunk; k < last; k++) {
co64->offsets[k-1] += offset;
}
}
}
}
return GF_OK;
}
