/**
* Buffers the given packet up ready for writing to the stream, but doesn't write it to disk yet.
* The granule position is updated on the page. If writing the packet requires a new page, then
* the updated granule position only applies to the new page
*/
public void bufferPacket(OggPacket packet, long granulePosition) {
if (closed) {
throw new IllegalStateException("Can't buffer packets on a closed stream!");
}
if (!doneFirstPacket) {
packet.setIsBOS();
doneFirstPacket = true;
}
int size = packet.getData().length;
boolean emptyPacket = (size == 0);
// Add to pages in turn
OggPage page = getCurrentPage(false);
int pos = 0;
while (pos < size || emptyPacket) {
pos = page.addPacket(packet, pos);
if (pos < size) {
page = getCurrentPage(true);
page.setIsContinuation();
}
page.setGranulePosition(granulePosition);
emptyPacket = false;
}
currentGranulePosition = granulePosition;
packet.setParent(page);
}
private OggPage getCurrentPage(boolean forceNew) {
if (buffer.size() == 0 || forceNew) {
OggPage page = new OggPage(sid, sequenceNumber++);
if (currentGranulePosition > 0) {
page.setGranulePosition(currentGranulePosition);
}
buffer.add(page);
return page;
}
return buffer.get(buffer.size() - 1);
}
/**
* Sets the current granule position. The granule position will be applied to all un-flushed
* packets, and all future packets. As such, you should normally either call a flush just before
* or just after this call.
*/
public void setGranulePosition(long position) {
currentGranulePosition = position;
for (OggPage p : buffer) {
p.setGranulePosition(position);
}
}
