private void WriteFullFrame(byte[] buffer, int offset, int count, bool lastFrame, bool overflow)
{
// TODO add logic for "overflow" pages
int segments = (count + 254) / 255;
byte[] frameHeader = new byte[27 + segments];
Array.Copy(OggHeader, frameHeader, OggHeader.Length);
frameHeader[4] = 0x00;
int frameType = 0;
if (!isFirstFrameWitten)
{
frameType |= FirstPageFlag;
isFirstFrameWitten = true;
}
if (lastFrame)
{
frameType |= LastPageFlag;
isLastFrameWritten = true;
}
frameHeader[5] = (byte)frameType;
Array.Copy(BitConverter.GetBytes(position), 0, frameHeader, 6, 8);
Array.Copy(BitConverter.GetBytes(streamId), 0, frameHeader, 14, 4);
Array.Copy(BitConverter.GetBytes(pageNumber), 0, frameHeader, 18, 4);
// 22 - 26 crc32
frameHeader[26] = (byte)segments;
for (int i = 0; i < segments - 1; i++)
{
frameHeader[27 + i] = 255;
}
frameHeader[27 + segments - 1] = (byte)(count - (segments - 1) * 255);
uint crc32 = CrcUtils.Crc32(0, frameHeader);
crc32 = CrcUtils.Crc32(crc32, buffer, offset, count);
Array.Copy(BitConverter.GetBytes(crc32), 0, frameHeader, 22, 4);
baseStream.Write(frameHeader, 0, frameHeader.Length);
baseStream.Write(buffer, offset, count);
pageNumber++;
position += (ulong)count;
}
private static uint Crc32(uint seed, byte[] data)
{
return(CrcUtils.Crc32(seed, data));
}
