private void Write(libogg.ogg_page page)
{
var header = new byte[page.header_len];
var body = new byte[page.body_len];
Marshal.Copy(page.header, header, 0, page.header_len);
Marshal.Copy(page.body, body, 0, page.body_len);
this.writer.Write(header);
this.writer.Write(body);
}
private void BufferPage()
{
var liboggPage = new libogg.ogg_page();
while (libogg.ogg_sync_pageout(ref this.syncState, ref liboggPage) != 1)
{
var bufferPtr = libogg.ogg_sync_buffer(ref this.syncState, 8192);
var readBytes = this.reader.ReadBytes(8192);
if (readBytes.Length == 0)
{
throw new EndOfStreamException("No more data in stream.");
}
Marshal.Copy(readBytes, 0, bufferPtr, readBytes.Length);
if (libogg.ogg_sync_wrote(ref this.syncState, readBytes.Length) != 0)
{
throw new InvalidOperationException("Could not confirm amount of bytes written to libogg.");
}
}
// Initialize a stream state with the same serial number as the page we just read
if (!this.isStreamStateInitialized)
{
var result = libogg.ogg_stream_init(ref this.streamState, libogg.ogg_page_serialno(ref liboggPage));
if (result != 0)
{
throw new InvalidOperationException("Failed to initialize libogg stream state.");
}
this.isStreamStateInitialized = true;
}
// Submit page to stream
if (libogg.ogg_stream_pagein(ref this.streamState, ref liboggPage) != 0)
{
throw new InvalidOperationException("Adding page to packet buffer failed due to a serial or page number mismatch, or an internal error occurred.");
}
}
public void Flush(bool force = true)
{
var liboggPage = new libogg.ogg_page();
int result;
// Output pages until no more are available using the chosen method
do
{
// Try to obtain a page, or squeeze it out if forcing
result = force
? libogg.ogg_stream_flush(ref this.streamState, ref liboggPage)
: libogg.ogg_stream_pageout(ref this.streamState, ref liboggPage);
// Write page data to stream if a page was accumulated
if (result != 0)
{
this.Write(liboggPage);
}
}while (result != 0);
}
