private static void PackComment(EncodeBuffer buffer, Comments vorbisComment)
{
// Preamble
buffer.Write(0x03, 8);
buffer.WriteString(VorbisString);
// Vendor
buffer.Write((uint)VendorString.Length, 32);
buffer.WriteString(VendorString);
// Comments
buffer.Write((uint)vorbisComment.UserComments.Count, 32);
foreach (var comment in vorbisComment.UserComments)
{
if (!string.IsNullOrEmpty(comment))
{
buffer.Write((uint)comment.Length, 32);
buffer.WriteString(comment);
}
else
{
buffer.Write(0, 32);
}
}
buffer.Write(1, 1);
}
private void PackBooks(EncodeBuffer buffer, VorbisInfo info)
{
var codecSetup = info.CodecSetup;
buffer.Write(0x05, 8);
buffer.WriteString(VorbisString);
buffer.Write((uint)(codecSetup.BookParams.Count - 1), 8);
foreach (var book in codecSetup.BookParams)
{
PackStaticBook(buffer, book);
}
// times; hook placeholders
buffer.Write(0, 6);
buffer.Write(0, 16);
buffer.Write((uint)(codecSetup.FloorParams.Count - 1), 6);
foreach (var floor in codecSetup.FloorParams)
{
buffer.Write(1, 16); // For now we're only using floor type 1
PackFloor(buffer, floor);
}
buffer.Write((uint)(codecSetup.ResidueParams.Count - 1), 6);
foreach (var residue in codecSetup.ResidueParams)
{
buffer.Write((uint)residue.ResidueType, 16);
PackResidue(buffer, residue);
}
buffer.Write((uint)(codecSetup.MapParams.Count - 1), 6);
foreach (var mapping in codecSetup.MapParams)
{
buffer.Write(0, 16); // Mapping type is always zero
PackMapping(buffer, info, mapping);
}
buffer.Write((uint)(codecSetup.ModeParams.Count - 1), 6);
for (var i = 0; i < codecSetup.ModeParams.Count; i++)
{
PackModes(buffer, codecSetup, i);
}
buffer.Write(1, 1);
}
private static void PackInfo(EncodeBuffer buffer, VorbisInfo info)
{
var codecSetup = info.CodecSetup;
// preamble
buffer.Write(0x01, 8);
buffer.WriteString(VorbisString);
// basic information about the stream
buffer.Write(0x00, 32);
buffer.Write((uint)info.Channels, 8);
buffer.Write((uint)info.SampleRate, 32);
buffer.Write(0, 32); // Bit rate upper not used
buffer.Write((uint)info.BitRateNominal, 32);
buffer.Write(0, 32); // Bit rate lower not used
buffer.Write((uint)Encoding.Log(codecSetup.BlockSizes[0] - 1), 4);
buffer.Write((uint)Encoding.Log(codecSetup.BlockSizes[1] - 1), 4);
buffer.Write(1, 1);
}
