/// <summary>Reads all frames.</summary>
/// <param name="stream">The stream.</param>
/// <returns></returns>
public static SynchronizedLyrics ReadAllFrames(Stream stream)
{
var items = new List <SynchronizedLyricsItem>();
var reader = new CdgReader(stream);
CdgPacket packet;
TimeSpan time;
while (reader.GetNextPacket(out packet, out time))
{
var builder = new SynchronizedLyricsItemBuilder();
builder.TimeCode = time;
switch (packet.Instruction)
{
case CdgInstruction.MemoryPreset: reader.ParseMemoryPreset(builder, packet); break;
case CdgInstruction.BorderPreset: break;
case CdgInstruction.TileBlock: reader.ParseTileBlock(builder, packet, false); break;
case CdgInstruction.TileBlockXor: reader.ParseTileBlock(builder, packet, true); break;
case CdgInstruction.ScrollPreset: reader.ParseScroll(builder, packet, false); break;
case CdgInstruction.ScrollCopy: reader.ParseScroll(builder, packet, true); break;
case CdgInstruction.DefineTransparentColor: reader.ParseDefineTransparentColor(builder, packet); break;
case CdgInstruction.LoadLowerColorTable: reader.ParseLoadColorTable(builder, packet, false); break;
case CdgInstruction.LoadHigherColorTable: reader.ParseLoadColorTable(builder, packet, true); break;
case CdgInstruction.Unknown: continue;
default:
Trace.TraceError("Unknown command <red>{0}", packet.Instruction);
continue;
}
if (builder.Commands.Count > 0)
{
items.Add(builder.ToSynchronizedLyricsItem());
}
}
return(new SynchronizedLyrics(items));
}
/// <summary>Creates a new <see cref="SynchronizedLyrics"/> instance by parsing the specified stream.</summary>
/// <param name="stream">The stream.</param>
/// <returns></returns>
public static SynchronizedLyrics FromStream(MemoryStream stream)
{
var items = new List <SynchronizedLyricsItem>();
long milliSecond = 0;
var reader = new DataReader(stream);
if (reader.ReadString(3) != "SLT")
{
throw new InvalidDataException("Invalid format!");
}
if (reader.Read7BitEncodedUInt64() != 1)
{
throw new InvalidDataException("Invalid version!");
}
while (reader.Available > 0)
{
long milliSecondDistance = reader.Read7BitEncodedInt64();
milliSecond += milliSecondDistance;
var item = new SynchronizedLyricsItemBuilder();
item.TimeCode = new TimeSpan(milliSecond * TimeSpan.TicksPerMillisecond);
while (true)
{
ISynchronizedLyricsCommand command = SynchronizedLyricsCommand.Parse(reader);
if (command == null)
{
break;
}
item.Commands.Add(command);
}
items.Add(item.ToSynchronizedLyricsItem());
}
return(new SynchronizedLyrics(items));
}